This is the initial analysis using ‘Outage 1’. Here is a summary of the inital dataset.
bigdataf1<- (read.csv(file.choose(), header=T))
str(bigdataf1)## 'data.frame': 1076 obs. of 44 variables:
## $ turbine_id : int 1 1 1 1 1 1 1 1 1 1 ...
## $ outage_id : int 6 6 6 6 6 6 6 6 6 6 ...
## $ turbine_type : int 0 0 0 0 0 0 0 0 0 0 ...
## $ time : int 10 20 30 40 50 60 70 80 90 100 ...
## $ classification : int 0 0 0 0 0 0 0 0 0 0 ...
## $ kw : num 260 367 135 394 601 ...
## $ volt_phase_a : num 386 387 386 387 388 ...
## $ volt_phase_b : num 389 389 388 390 391 ...
## $ volt_phase_c : num 390 390 389 390 392 ...
## $ current_phase_a : num 267 344 187 372 529 ...
## $ current_phase_b : num 266 343 187 371 529 ...
## $ current_phase_c : num 270 347 192 375 532 ...
## $ gen_rpm : num 860 875 860 906 975 ...
## $ rotor_rpm : num 9.62 9.78 9.61 10.13 10.9 ...
## $ actual_angle_blade_1 : num -0.12 -0.09 0.92 0.09 -0.14 -0.14 -0.19 -0.27 -0.21 -0.29 ...
## $ wind_speed : num 4.63 5.37 3.91 5.42 6.43 6.63 6.85 6.15 4.88 6.92 ...
## $ nacelle_position : num 31.7 27 27.8 25.5 23.7 ...
## $ actual_angle_blade_2 : num 0 -0.09 1.01 0.07 -0.22 -0.22 -0.07 -0.06 -0.1 -0.15 ...
## $ actual_angle_blade_3 : num 0.29 0.32 1.44 0.77 0.59 0.59 0.49 0.38 0.36 0.33 ...
## $ wind_deviation : num -1.69 -2.15 0.93 -0.99 -1.45 -1.91 -1.78 -3.03 -4.24 -4.56 ...
## $ gen_1_temp : num 58.5 59 58.1 57.7 59.6 ...
## $ gen_2_temp : num 58.6 59 58 57.6 59.5 ...
## $ bearing_a_temp : num 35.6 34.6 34.1 33.3 32.8 ...
## $ bearing_b_temp : num 50.9 49.8 48.8 47.9 47.1 ...
## $ tran_temp : num 64 63.8 63.3 62.9 62.9 ...
## $ ambient_temp : num 10.58 10.46 10.48 10.19 9.84 ...
## $ tran_bearing_a_temp : num 68.2 68.4 67.4 67.4 68.2 ...
## $ wind_deviation_one_sec : num -1.63 -2.14 0.97 -1.02 -1.54 -1.91 -1.69 -2.94 -4.39 -4.4 ...
## $ reactive_power : num -169 -158 -163 -160 -150 ...
## $ generator_speed_plc : num 860 875 860 906 975 ...
## $ torque_actual_value : int 27 25 21 60 66 56 61 57 36 51 ...
## $ torque_set_value : num 25.5 35.1 13.2 35.9 51.6 ...
## $ temp_nacelle : num 24.6 24 23.5 23.2 23.2 ...
## $ temp_generator_cooling_air: num 50.6 50.5 49.9 49.2 50 ...
## $ temp_shaft_bearing : num 31.2 31.2 31 30.9 30.9 ...
## $ high_speed_running_number : num 11.13 9.82 13.46 10.4 9.06 ...
## $ tower_acceleration : num 96.2 93.7 83.3 90.1 90.4 ...
## $ hydraulic_pressure : num 27.9 27.8 27.8 27.8 27.7 ...
## $ temp_main_box : num 20.5 20.3 20.2 19.9 19.7 ...
## $ temp_top_box : num 38.1 37.7 37.2 36.8 36.4 ...
## $ temp_battery_box_axis_1 : num 28.4 28.3 28.2 28.1 27.9 ...
## $ temp_battery_box_axis_2 : num 27.7 27.6 27.6 27.5 27.4 ...
## $ temp_battery_box_axis_3 : num 26.4 26.3 26.2 26.1 25.9 ...
## $ temp_hub : num 25.8 25.7 25.3 25.4 25.6 ...In order to understand the data and important attributes we subset the data into two subsets. The idea is to segregate the one that fails from the normal ones so that important trends can be identified.
failed<-subset(bigdataf1,turbine_id=75,select=turbine_id:temp_hub)
#summary(failed)
normal<-subset(bigdataf1,turbine_id!=75,select=turbine_id:temp_hub)We conducted a linear regression for both the subsets in order to ascertain which independent variables are most significant:
##This is the test for the failed turbine
lm1<-lm(kw~.,data=failed)
summary(lm1)##
## Call:
## lm(formula = kw ~ ., data = failed)
##
## Residuals:
## Min 1Q Median 3Q Max
## -126.435 -8.268 0.383 9.383 58.445
##
## Coefficients: (4 not defined because of singularities)
## Estimate Std. Error t value Pr(>|t|)
## (Intercept) -8.509e+02 3.480e+02 -2.445 0.014644 *
## turbine_id NA NA NA NA
## outage_id NA NA NA NA
## turbine_type NA NA NA NA
## time -1.976e-04 3.014e-04 -0.656 0.512259
## classification NA NA NA NA
## volt_phase_a 1.584e+01 3.237e+00 4.892 1.16e-06 ***
## volt_phase_b -8.798e+00 1.553e+00 -5.664 1.91e-08 ***
## volt_phase_c -5.114e+00 2.745e+00 -1.863 0.062748 .
## current_phase_a 3.522e+00 7.623e-01 4.620 4.33e-06 ***
## current_phase_b -4.139e+00 1.175e+00 -3.522 0.000447 ***
## current_phase_c 1.300e+00 1.144e+00 1.136 0.256194
## gen_rpm -1.651e-01 1.095e+00 -0.151 0.880191
## rotor_rpm -1.221e+01 1.063e+01 -1.148 0.251121
## actual_angle_blade_1 1.620e+01 7.568e+00 2.141 0.032494 *
## wind_speed -3.402e+00 8.742e-01 -3.892 0.000106 ***
## nacelle_position -1.783e-03 5.340e-03 -0.334 0.738573
## actual_angle_blade_2 -3.494e+01 9.847e+00 -3.549 0.000405 ***
## actual_angle_blade_3 2.106e+01 5.516e+00 3.819 0.000142 ***
## wind_deviation -2.465e-01 2.931e+00 -0.084 0.932995
## gen_1_temp 6.839e+00 4.614e+00 1.482 0.138615
## gen_2_temp -5.018e+00 4.739e+00 -1.059 0.289863
## bearing_a_temp -1.105e+00 5.847e-01 -1.889 0.059171 .
## bearing_b_temp 8.252e-01 2.703e-01 3.053 0.002325 **
## tran_temp 3.511e-01 1.100e+00 0.319 0.749684
## ambient_temp 1.558e+00 3.509e-01 4.440 9.96e-06 ***
## tran_bearing_a_temp -1.310e+00 1.096e+00 -1.194 0.232631
## wind_deviation_one_sec 1.389e-01 2.944e+00 0.047 0.962388
## reactive_power 3.217e-01 2.341e-02 13.743 < 2e-16 ***
## generator_speed_plc 4.443e-01 1.135e+00 0.391 0.695616
## torque_actual_value 7.610e-02 4.517e-02 1.684 0.092389 .
## torque_set_value 6.847e+00 2.049e-01 33.410 < 2e-16 ***
## temp_nacelle 8.114e-01 6.361e-01 1.276 0.202383
## temp_generator_cooling_air -2.147e+00 4.002e-01 -5.364 1.00e-07 ***
## temp_shaft_bearing -1.235e+00 1.541e+00 -0.801 0.423303
## high_speed_running_number 1.981e+00 7.403e-01 2.675 0.007584 **
## tower_acceleration -3.529e-02 2.630e-02 -1.342 0.179954
## hydraulic_pressure 2.475e+00 1.620e+00 1.528 0.126924
## temp_main_box -3.313e+00 3.369e-01 -9.835 < 2e-16 ***
## temp_top_box -1.519e+00 2.601e-01 -5.839 7.04e-09 ***
## temp_battery_box_axis_1 8.688e+00 2.636e+00 3.296 0.001014 **
## temp_battery_box_axis_2 -3.328e+00 3.421e+00 -0.973 0.330746
## temp_battery_box_axis_3 -6.836e+00 2.694e+00 -2.537 0.011314 *
## temp_hub 3.805e+00 1.183e+00 3.218 0.001331 **
## ---
## Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
##
## Residual standard error: 16.02 on 1035 degrees of freedom
## (1 observation deleted due to missingness)
## Multiple R-squared: 0.9993, Adjusted R-squared: 0.9993
## F-statistic: 3.768e+04 on 39 and 1035 DF, p-value: < 2.2e-16##This is the test for the normal turbine
lm2<-lm(kw~.,data=normal)
summary(lm2)##
## Call:
## lm(formula = kw ~ ., data = normal)
##
## Residuals:
## Min 1Q Median 3Q Max
## -126.435 -8.268 0.383 9.383 58.445
##
## Coefficients: (4 not defined because of singularities)
## Estimate Std. Error t value Pr(>|t|)
## (Intercept) -8.509e+02 3.480e+02 -2.445 0.014644 *
## turbine_id NA NA NA NA
## outage_id NA NA NA NA
## turbine_type NA NA NA NA
## time -1.976e-04 3.014e-04 -0.656 0.512259
## classification NA NA NA NA
## volt_phase_a 1.584e+01 3.237e+00 4.892 1.16e-06 ***
## volt_phase_b -8.798e+00 1.553e+00 -5.664 1.91e-08 ***
## volt_phase_c -5.114e+00 2.745e+00 -1.863 0.062748 .
## current_phase_a 3.522e+00 7.623e-01 4.620 4.33e-06 ***
## current_phase_b -4.139e+00 1.175e+00 -3.522 0.000447 ***
## current_phase_c 1.300e+00 1.144e+00 1.136 0.256194
## gen_rpm -1.651e-01 1.095e+00 -0.151 0.880191
## rotor_rpm -1.221e+01 1.063e+01 -1.148 0.251121
## actual_angle_blade_1 1.620e+01 7.568e+00 2.141 0.032494 *
## wind_speed -3.402e+00 8.742e-01 -3.892 0.000106 ***
## nacelle_position -1.783e-03 5.340e-03 -0.334 0.738573
## actual_angle_blade_2 -3.494e+01 9.847e+00 -3.549 0.000405 ***
## actual_angle_blade_3 2.106e+01 5.516e+00 3.819 0.000142 ***
## wind_deviation -2.465e-01 2.931e+00 -0.084 0.932995
## gen_1_temp 6.839e+00 4.614e+00 1.482 0.138615
## gen_2_temp -5.018e+00 4.739e+00 -1.059 0.289863
## bearing_a_temp -1.105e+00 5.847e-01 -1.889 0.059171 .
## bearing_b_temp 8.252e-01 2.703e-01 3.053 0.002325 **
## tran_temp 3.511e-01 1.100e+00 0.319 0.749684
## ambient_temp 1.558e+00 3.509e-01 4.440 9.96e-06 ***
## tran_bearing_a_temp -1.310e+00 1.096e+00 -1.194 0.232631
## wind_deviation_one_sec 1.389e-01 2.944e+00 0.047 0.962388
## reactive_power 3.217e-01 2.341e-02 13.743 < 2e-16 ***
## generator_speed_plc 4.443e-01 1.135e+00 0.391 0.695616
## torque_actual_value 7.610e-02 4.517e-02 1.684 0.092389 .
## torque_set_value 6.847e+00 2.049e-01 33.410 < 2e-16 ***
## temp_nacelle 8.114e-01 6.361e-01 1.276 0.202383
## temp_generator_cooling_air -2.147e+00 4.002e-01 -5.364 1.00e-07 ***
## temp_shaft_bearing -1.235e+00 1.541e+00 -0.801 0.423303
## high_speed_running_number 1.981e+00 7.403e-01 2.675 0.007584 **
## tower_acceleration -3.529e-02 2.630e-02 -1.342 0.179954
## hydraulic_pressure 2.475e+00 1.620e+00 1.528 0.126924
## temp_main_box -3.313e+00 3.369e-01 -9.835 < 2e-16 ***
## temp_top_box -1.519e+00 2.601e-01 -5.839 7.04e-09 ***
## temp_battery_box_axis_1 8.688e+00 2.636e+00 3.296 0.001014 **
## temp_battery_box_axis_2 -3.328e+00 3.421e+00 -0.973 0.330746
## temp_battery_box_axis_3 -6.836e+00 2.694e+00 -2.537 0.011314 *
## temp_hub 3.805e+00 1.183e+00 3.218 0.001331 **
## ---
## Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
##
## Residual standard error: 16.02 on 1035 degrees of freedom
## (1 observation deleted due to missingness)
## Multiple R-squared: 0.9993, Adjusted R-squared: 0.9993
## F-statistic: 3.768e+04 on 39 and 1035 DF, p-value: < 2.2e-16As is evident from the initial analysis, both the failed turbine data and normal turbine data show similar results. Both subsets have exactly similar significant attributes. Since the number of significant attributes is quite high, therefore in order to reduce dimensionality we perform stepwise linear regression.
library(MASS)## Warning: package 'MASS' was built under R version 3.1.3##This is the test for the failed turbine
lm3<-lm(kw~.,data=failed)
step1=stepAIC(lm3,direction="both")## Start: AIC=6002.66
## kw ~ turbine_id + outage_id + turbine_type + time + classification +
## volt_phase_a + volt_phase_b + volt_phase_c + current_phase_a +
## current_phase_b + current_phase_c + gen_rpm + rotor_rpm +
## actual_angle_blade_1 + wind_speed + nacelle_position + actual_angle_blade_2 +
## actual_angle_blade_3 + wind_deviation + gen_1_temp + gen_2_temp +
## bearing_a_temp + bearing_b_temp + tran_temp + ambient_temp +
## tran_bearing_a_temp + wind_deviation_one_sec + reactive_power +
## generator_speed_plc + torque_actual_value + torque_set_value +
## temp_nacelle + temp_generator_cooling_air + temp_shaft_bearing +
## high_speed_running_number + tower_acceleration + hydraulic_pressure +
## temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_2 + temp_battery_box_axis_3 + temp_hub
##
##
## Step: AIC=6002.66
## kw ~ turbine_id + outage_id + turbine_type + time + volt_phase_a +
## volt_phase_b + volt_phase_c + current_phase_a + current_phase_b +
## current_phase_c + gen_rpm + rotor_rpm + actual_angle_blade_1 +
## wind_speed + nacelle_position + actual_angle_blade_2 + actual_angle_blade_3 +
## wind_deviation + gen_1_temp + gen_2_temp + bearing_a_temp +
## bearing_b_temp + tran_temp + ambient_temp + tran_bearing_a_temp +
## wind_deviation_one_sec + reactive_power + generator_speed_plc +
## torque_actual_value + torque_set_value + temp_nacelle + temp_generator_cooling_air +
## temp_shaft_bearing + high_speed_running_number + tower_acceleration +
## hydraulic_pressure + temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_2 + temp_battery_box_axis_3 + temp_hub
##
##
## Step: AIC=6002.66
## kw ~ turbine_id + outage_id + time + volt_phase_a + volt_phase_b +
## volt_phase_c + current_phase_a + current_phase_b + current_phase_c +
## gen_rpm + rotor_rpm + actual_angle_blade_1 + wind_speed +
## nacelle_position + actual_angle_blade_2 + actual_angle_blade_3 +
## wind_deviation + gen_1_temp + gen_2_temp + bearing_a_temp +
## bearing_b_temp + tran_temp + ambient_temp + tran_bearing_a_temp +
## wind_deviation_one_sec + reactive_power + generator_speed_plc +
## torque_actual_value + torque_set_value + temp_nacelle + temp_generator_cooling_air +
## temp_shaft_bearing + high_speed_running_number + tower_acceleration +
## hydraulic_pressure + temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_2 + temp_battery_box_axis_3 + temp_hub
##
##
## Step: AIC=6002.66
## kw ~ turbine_id + time + volt_phase_a + volt_phase_b + volt_phase_c +
## current_phase_a + current_phase_b + current_phase_c + gen_rpm +
## rotor_rpm + actual_angle_blade_1 + wind_speed + nacelle_position +
## actual_angle_blade_2 + actual_angle_blade_3 + wind_deviation +
## gen_1_temp + gen_2_temp + bearing_a_temp + bearing_b_temp +
## tran_temp + ambient_temp + tran_bearing_a_temp + wind_deviation_one_sec +
## reactive_power + generator_speed_plc + torque_actual_value +
## torque_set_value + temp_nacelle + temp_generator_cooling_air +
## temp_shaft_bearing + high_speed_running_number + tower_acceleration +
## hydraulic_pressure + temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_2 + temp_battery_box_axis_3 + temp_hub
##
##
## Step: AIC=6002.66
## kw ~ time + volt_phase_a + volt_phase_b + volt_phase_c + current_phase_a +
## current_phase_b + current_phase_c + gen_rpm + rotor_rpm +
## actual_angle_blade_1 + wind_speed + nacelle_position + actual_angle_blade_2 +
## actual_angle_blade_3 + wind_deviation + gen_1_temp + gen_2_temp +
## bearing_a_temp + bearing_b_temp + tran_temp + ambient_temp +
## tran_bearing_a_temp + wind_deviation_one_sec + reactive_power +
## generator_speed_plc + torque_actual_value + torque_set_value +
## temp_nacelle + temp_generator_cooling_air + temp_shaft_bearing +
## high_speed_running_number + tower_acceleration + hydraulic_pressure +
## temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_2 + temp_battery_box_axis_3 + temp_hub
##
## Df Sum of Sq RSS AIC
## - wind_deviation_one_sec 1 1 265543 6000.7
## - wind_deviation 1 2 265544 6000.7
## - gen_rpm 1 6 265548 6000.7
## - tran_temp 1 26 265569 6000.8
## - nacelle_position 1 29 265571 6000.8
## - generator_speed_plc 1 39 265582 6000.8
## - time 1 110 265653 6001.1
## - temp_shaft_bearing 1 165 265707 6001.3
## - temp_battery_box_axis_2 1 243 265786 6001.6
## - gen_2_temp 1 288 265830 6001.8
## - current_phase_c 1 331 265874 6002.0
## - rotor_rpm 1 338 265881 6002.0
## - tran_bearing_a_temp 1 366 265909 6002.1
## - temp_nacelle 1 417 265960 6002.4
## - tower_acceleration 1 462 266005 6002.5
## <none> 265543 6002.7
## - gen_1_temp 1 564 266106 6002.9
## - hydraulic_pressure 1 599 266141 6003.1
## - torque_actual_value 1 728 266271 6003.6
## - volt_phase_c 1 890 266433 6004.3
## - bearing_a_temp 1 915 266458 6004.4
## - actual_angle_blade_1 1 1176 266719 6005.4
## - temp_battery_box_axis_3 1 1652 267195 6007.3
## - high_speed_running_number 1 1836 267379 6008.1
## - bearing_b_temp 1 2391 267934 6010.3
## - temp_hub 1 2657 268199 6011.4
## - temp_battery_box_axis_1 1 2787 268330 6011.9
## - current_phase_b 1 3183 268726 6013.5
## - actual_angle_blade_2 1 3231 268773 6013.7
## - actual_angle_blade_3 1 3741 269284 6015.7
## - wind_speed 1 3886 269428 6016.3
## - ambient_temp 1 5058 270600 6020.9
## - current_phase_a 1 5475 271018 6022.6
## - volt_phase_a 1 6141 271683 6025.2
## - temp_generator_cooling_air 1 7383 272926 6030.1
## - volt_phase_b 1 8231 273774 6033.5
## - temp_top_box 1 8746 274289 6035.5
## - temp_main_box 1 24815 290358 6096.7
## - reactive_power 1 48457 314000 6180.9
## - torque_set_value 1 286378 551920 6787.2
##
## Step: AIC=6000.67
## kw ~ time + volt_phase_a + volt_phase_b + volt_phase_c + current_phase_a +
## current_phase_b + current_phase_c + gen_rpm + rotor_rpm +
## actual_angle_blade_1 + wind_speed + nacelle_position + actual_angle_blade_2 +
## actual_angle_blade_3 + wind_deviation + gen_1_temp + gen_2_temp +
## bearing_a_temp + bearing_b_temp + tran_temp + ambient_temp +
## tran_bearing_a_temp + reactive_power + generator_speed_plc +
## torque_actual_value + torque_set_value + temp_nacelle + temp_generator_cooling_air +
## temp_shaft_bearing + high_speed_running_number + tower_acceleration +
## hydraulic_pressure + temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_2 + temp_battery_box_axis_3 + temp_hub
##
## Df Sum of Sq RSS AIC
## - gen_rpm 1 6 265550 5998.7
## - tran_temp 1 26 265569 5998.8
## - nacelle_position 1 28 265572 5998.8
## - generator_speed_plc 1 41 265584 5998.8
## - time 1 110 265654 5999.1
## - temp_shaft_bearing 1 165 265708 5999.3
## - temp_battery_box_axis_2 1 243 265786 5999.6
## - gen_2_temp 1 287 265830 5999.8
## - current_phase_c 1 331 265875 6000.0
## - rotor_rpm 1 338 265882 6000.0
## - tran_bearing_a_temp 1 365 265909 6000.1
## - wind_deviation 1 413 265956 6000.3
## - temp_nacelle 1 417 265961 6000.4
## - tower_acceleration 1 462 266005 6000.5
## <none> 265543 6000.7
## - gen_1_temp 1 563 266106 6000.9
## - hydraulic_pressure 1 598 266141 6001.1
## - torque_actual_value 1 729 266273 6001.6
## - volt_phase_c 1 890 266433 6002.3
## - bearing_a_temp 1 915 266458 6002.4
## + wind_deviation_one_sec 1 1 265543 6002.7
## - actual_angle_blade_1 1 1177 266720 6003.4
## - temp_battery_box_axis_3 1 1654 267197 6005.3
## - high_speed_running_number 1 1845 267388 6006.1
## - bearing_b_temp 1 2391 267934 6008.3
## - temp_hub 1 2657 268200 6009.4
## - temp_battery_box_axis_1 1 2787 268331 6009.9
## - current_phase_b 1 3182 268726 6011.5
## - actual_angle_blade_2 1 3231 268774 6011.7
## - actual_angle_blade_3 1 3740 269284 6013.7
## - wind_speed 1 3885 269429 6014.3
## - ambient_temp 1 5057 270600 6018.9
## - current_phase_a 1 5476 271019 6020.6
## - volt_phase_a 1 6140 271683 6023.2
## - temp_generator_cooling_air 1 7385 272928 6028.2
## - volt_phase_b 1 8230 273774 6031.5
## - temp_top_box 1 8746 274289 6033.5
## - temp_main_box 1 24814 290358 6094.7
## - reactive_power 1 48486 314029 6179.0
## - torque_set_value 1 286736 552279 6785.9
##
## Step: AIC=5998.69
## kw ~ time + volt_phase_a + volt_phase_b + volt_phase_c + current_phase_a +
## current_phase_b + current_phase_c + rotor_rpm + actual_angle_blade_1 +
## wind_speed + nacelle_position + actual_angle_blade_2 + actual_angle_blade_3 +
## wind_deviation + gen_1_temp + gen_2_temp + bearing_a_temp +
## bearing_b_temp + tran_temp + ambient_temp + tran_bearing_a_temp +
## reactive_power + generator_speed_plc + torque_actual_value +
## torque_set_value + temp_nacelle + temp_generator_cooling_air +
## temp_shaft_bearing + high_speed_running_number + tower_acceleration +
## hydraulic_pressure + temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_2 + temp_battery_box_axis_3 + temp_hub
##
## Df Sum of Sq RSS AIC
## - nacelle_position 1 26 265576 5996.8
## - tran_temp 1 26 265576 5996.8
## - time 1 114 265664 5997.2
## - temp_shaft_bearing 1 164 265714 5997.4
## - temp_battery_box_axis_2 1 249 265798 5997.7
## - gen_2_temp 1 290 265840 5997.9
## - current_phase_c 1 336 265886 5998.1
## - rotor_rpm 1 341 265890 5998.1
## - tran_bearing_a_temp 1 367 265917 5998.2
## - wind_deviation 1 407 265956 5998.3
## - temp_nacelle 1 421 265970 5998.4
## - tower_acceleration 1 456 266005 5998.5
## <none> 265550 5998.7
## - gen_1_temp 1 567 266116 5999.0
## - hydraulic_pressure 1 592 266142 5999.1
## - torque_actual_value 1 732 266282 5999.7
## - bearing_a_temp 1 914 266464 6000.4
## - volt_phase_c 1 924 266473 6000.4
## + gen_rpm 1 6 265543 6000.7
## + wind_deviation_one_sec 1 1 265548 6000.7
## - actual_angle_blade_1 1 1175 266725 6001.4
## - generator_speed_plc 1 1362 266912 6002.2
## - temp_battery_box_axis_3 1 1660 267210 6003.4
## - high_speed_running_number 1 1841 267391 6004.1
## - bearing_b_temp 1 2387 267936 6006.3
## - temp_hub 1 2661 268210 6007.4
## - temp_battery_box_axis_1 1 2844 268393 6008.1
## - current_phase_b 1 3188 268738 6009.5
## - actual_angle_blade_2 1 3234 268783 6009.7
## - actual_angle_blade_3 1 3755 269304 6011.8
## - wind_speed 1 3998 269547 6012.8
## - ambient_temp 1 5054 270604 6017.0
## - current_phase_a 1 5470 271019 6018.6
## - volt_phase_a 1 6334 271883 6022.0
## - temp_generator_cooling_air 1 7381 272931 6026.2
## - volt_phase_b 1 8371 273921 6030.1
## - temp_top_box 1 8742 274292 6031.5
## - temp_main_box 1 24847 290397 6092.8
## - reactive_power 1 48479 314029 6177.0
## - torque_set_value 1 287353 552903 6785.1
##
## Step: AIC=5996.8
## kw ~ time + volt_phase_a + volt_phase_b + volt_phase_c + current_phase_a +
## current_phase_b + current_phase_c + rotor_rpm + actual_angle_blade_1 +
## wind_speed + actual_angle_blade_2 + actual_angle_blade_3 +
## wind_deviation + gen_1_temp + gen_2_temp + bearing_a_temp +
## bearing_b_temp + tran_temp + ambient_temp + tran_bearing_a_temp +
## reactive_power + generator_speed_plc + torque_actual_value +
## torque_set_value + temp_nacelle + temp_generator_cooling_air +
## temp_shaft_bearing + high_speed_running_number + tower_acceleration +
## hydraulic_pressure + temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_2 + temp_battery_box_axis_3 + temp_hub
##
## Df Sum of Sq RSS AIC
## - tran_temp 1 25 265601 5994.9
## - time 1 114 265690 5995.3
## - temp_shaft_bearing 1 183 265759 5995.5
## - temp_battery_box_axis_2 1 256 265832 5995.8
## - gen_2_temp 1 295 265871 5996.0
## - rotor_rpm 1 322 265898 5996.1
## - current_phase_c 1 335 265911 5996.2
## - tran_bearing_a_temp 1 359 265935 5996.2
## - wind_deviation 1 415 265991 5996.5
## - temp_nacelle 1 419 265995 5996.5
## - tower_acceleration 1 452 266028 5996.6
## <none> 265576 5996.8
## - gen_1_temp 1 573 266149 5997.1
## - hydraulic_pressure 1 604 266180 5997.2
## - torque_actual_value 1 744 266320 5997.8
## - bearing_a_temp 1 893 266469 5998.4
## - volt_phase_c 1 928 266505 5998.6
## + nacelle_position 1 26 265550 5998.7
## + gen_rpm 1 4 265572 5998.8
## + wind_deviation_one_sec 1 1 265575 5998.8
## - actual_angle_blade_1 1 1201 266777 5999.7
## - generator_speed_plc 1 1336 266912 6000.2
## - temp_battery_box_axis_3 1 1680 267256 6001.6
## - high_speed_running_number 1 1834 267410 6002.2
## - bearing_b_temp 1 2367 267943 6004.3
## - temp_hub 1 2652 268228 6005.5
## - temp_battery_box_axis_1 1 2995 268571 6006.9
## - current_phase_b 1 3173 268749 6007.6
## - actual_angle_blade_2 1 3258 268834 6007.9
## - actual_angle_blade_3 1 3741 269317 6009.8
## - wind_speed 1 4115 269691 6011.3
## - ambient_temp 1 5056 270632 6015.1
## - current_phase_a 1 5450 271026 6016.6
## - volt_phase_a 1 6450 272026 6020.6
## - temp_generator_cooling_air 1 7371 272947 6024.2
## - volt_phase_b 1 8525 274101 6028.8
## - temp_top_box 1 8839 274415 6030.0
## - temp_main_box 1 25202 290778 6092.3
## - reactive_power 1 48647 314223 6175.6
## - torque_set_value 1 288047 553623 6784.5
##
## Step: AIC=5994.9
## kw ~ time + volt_phase_a + volt_phase_b + volt_phase_c + current_phase_a +
## current_phase_b + current_phase_c + rotor_rpm + actual_angle_blade_1 +
## wind_speed + actual_angle_blade_2 + actual_angle_blade_3 +
## wind_deviation + gen_1_temp + gen_2_temp + bearing_a_temp +
## bearing_b_temp + ambient_temp + tran_bearing_a_temp + reactive_power +
## generator_speed_plc + torque_actual_value + torque_set_value +
## temp_nacelle + temp_generator_cooling_air + temp_shaft_bearing +
## high_speed_running_number + tower_acceleration + hydraulic_pressure +
## temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_2 + temp_battery_box_axis_3 + temp_hub
##
## Df Sum of Sq RSS AIC
## - time 1 122 265722 5993.4
## - temp_shaft_bearing 1 189 265790 5993.7
## - temp_battery_box_axis_2 1 233 265834 5993.8
## - rotor_rpm 1 314 265915 5994.2
## - gen_2_temp 1 321 265922 5994.2
## - current_phase_c 1 323 265923 5994.2
## - wind_deviation 1 428 266029 5994.6
## - temp_nacelle 1 454 266055 5994.7
## - tower_acceleration 1 479 266080 5994.8
## <none> 265601 5994.9
## - hydraulic_pressure 1 584 266184 5995.3
## - gen_1_temp 1 602 266203 5995.3
## - torque_actual_value 1 744 266344 5995.9
## - bearing_a_temp 1 877 266477 5996.4
## - volt_phase_c 1 912 266512 5996.6
## + tran_temp 1 25 265576 5996.8
## + nacelle_position 1 25 265576 5996.8
## + gen_rpm 1 5 265596 5996.9
## + wind_deviation_one_sec 1 0 265600 5996.9
## - actual_angle_blade_1 1 1202 266803 5997.8
## - generator_speed_plc 1 1316 266917 5998.2
## - temp_battery_box_axis_3 1 1863 267464 6000.4
## - high_speed_running_number 1 1947 267548 6000.8
## - bearing_b_temp 1 2418 268018 6002.6
## - temp_hub 1 2837 268438 6004.3
## - temp_battery_box_axis_1 1 2971 268572 6004.9
## - current_phase_b 1 3149 268750 6005.6
## - actual_angle_blade_2 1 3251 268851 6006.0
## - tran_bearing_a_temp 1 3551 269151 6007.2
## - actual_angle_blade_3 1 3727 269328 6007.9
## - wind_speed 1 4091 269692 6009.3
## - ambient_temp 1 5032 270632 6013.1
## - current_phase_a 1 5445 271045 6014.7
## - volt_phase_a 1 6427 272027 6018.6
## - temp_generator_cooling_air 1 8094 273694 6025.2
## - volt_phase_b 1 8517 274117 6026.8
## - temp_top_box 1 8991 274592 6028.7
## - temp_main_box 1 25348 290949 6090.9
## - reactive_power 1 49354 314955 6176.1
## - torque_set_value 1 289356 554956 6785.1
##
## Step: AIC=5993.39
## kw ~ volt_phase_a + volt_phase_b + volt_phase_c + current_phase_a +
## current_phase_b + current_phase_c + rotor_rpm + actual_angle_blade_1 +
## wind_speed + actual_angle_blade_2 + actual_angle_blade_3 +
## wind_deviation + gen_1_temp + gen_2_temp + bearing_a_temp +
## bearing_b_temp + ambient_temp + tran_bearing_a_temp + reactive_power +
## generator_speed_plc + torque_actual_value + torque_set_value +
## temp_nacelle + temp_generator_cooling_air + temp_shaft_bearing +
## high_speed_running_number + tower_acceleration + hydraulic_pressure +
## temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_2 + temp_battery_box_axis_3 + temp_hub
##
## Df Sum of Sq RSS AIC
## - temp_battery_box_axis_2 1 199 265922 5992.2
## - temp_shaft_bearing 1 276 265998 5992.5
## - current_phase_c 1 340 266063 5992.8
## - temp_nacelle 1 366 266089 5992.9
## - gen_2_temp 1 368 266091 5992.9
## - rotor_rpm 1 405 266127 5993.0
## - wind_deviation 1 433 266156 5993.1
## - tower_acceleration 1 493 266215 5993.4
## <none> 265722 5993.4
## - gen_1_temp 1 663 266386 5994.1
## - torque_actual_value 1 729 266451 5994.3
## - volt_phase_c 1 795 266518 5994.6
## + time 1 122 265601 5994.9
## - hydraulic_pressure 1 904 266626 5995.0
## + tran_temp 1 33 265690 5995.3
## + nacelle_position 1 23 265699 5995.3
## - bearing_a_temp 1 981 266703 5995.4
## + gen_rpm 1 9 265713 5995.4
## + wind_deviation_one_sec 1 1 265722 5995.4
## - actual_angle_blade_1 1 1258 266980 5996.5
## - generator_speed_plc 1 1524 267246 5997.5
## - temp_battery_box_axis_3 1 1758 267480 5998.5
## - high_speed_running_number 1 1953 267675 5999.3
## - temp_hub 1 2747 268469 6002.4
## - bearing_b_temp 1 2833 268555 6002.8
## - temp_battery_box_axis_1 1 2851 268573 6002.9
## - actual_angle_blade_2 1 3397 269119 6005.0
## - current_phase_b 1 3581 269303 6005.8
## - tran_bearing_a_temp 1 3628 269351 6006.0
## - actual_angle_blade_3 1 3856 269578 6006.9
## - wind_speed 1 4129 269851 6008.0
## - ambient_temp 1 5463 271185 6013.3
## - current_phase_a 1 6338 272060 6016.7
## - volt_phase_a 1 6348 272071 6016.8
## - temp_generator_cooling_air 1 7972 273695 6023.2
## - volt_phase_b 1 8408 274130 6024.9
## - temp_top_box 1 8897 274619 6026.8
## - temp_main_box 1 25493 291215 6089.9
## - reactive_power 1 49456 315178 6174.9
## - torque_set_value 1 289442 555164 6783.5
##
## Step: AIC=5992.2
## kw ~ volt_phase_a + volt_phase_b + volt_phase_c + current_phase_a +
## current_phase_b + current_phase_c + rotor_rpm + actual_angle_blade_1 +
## wind_speed + actual_angle_blade_2 + actual_angle_blade_3 +
## wind_deviation + gen_1_temp + gen_2_temp + bearing_a_temp +
## bearing_b_temp + ambient_temp + tran_bearing_a_temp + reactive_power +
## generator_speed_plc + torque_actual_value + torque_set_value +
## temp_nacelle + temp_generator_cooling_air + temp_shaft_bearing +
## high_speed_running_number + tower_acceleration + hydraulic_pressure +
## temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_3 + temp_hub
##
## Df Sum of Sq RSS AIC
## - current_phase_c 1 363 266285 5991.7
## - temp_shaft_bearing 1 408 266329 5991.8
## - tower_acceleration 1 467 266388 5992.1
## - wind_deviation 1 482 266403 5992.1
## <none> 265922 5992.2
## - gen_2_temp 1 515 266437 5992.3
## - rotor_rpm 1 581 266503 5992.5
## - temp_nacelle 1 582 266503 5992.5
## - torque_actual_value 1 730 266652 5993.1
## - volt_phase_c 1 788 266709 5993.4
## + temp_battery_box_axis_2 1 199 265722 5993.4
## - gen_1_temp 1 864 266785 5993.7
## + time 1 88 265834 5993.8
## + nacelle_position 1 32 265889 5994.1
## - hydraulic_pressure 1 970 266891 5994.1
## + gen_rpm 1 13 265908 5994.1
## + wind_deviation_one_sec 1 1 265921 5994.2
## + tran_temp 1 0 265921 5994.2
## - bearing_a_temp 1 1212 267134 5995.1
## - actual_angle_blade_1 1 1353 267275 5995.7
## - high_speed_running_number 1 1886 267807 5997.8
## - generator_speed_plc 1 1933 267854 5998.0
## - temp_hub 1 2553 268474 6000.5
## - temp_battery_box_axis_1 1 2781 268703 6001.4
## - bearing_b_temp 1 3306 269228 6003.5
## - temp_battery_box_axis_3 1 3625 269547 6004.8
## - actual_angle_blade_2 1 3633 269554 6004.8
## - current_phase_b 1 3669 269591 6004.9
## - actual_angle_blade_3 1 4038 269960 6006.4
## - tran_bearing_a_temp 1 4296 270217 6007.4
## - wind_speed 1 4352 270274 6007.6
## - ambient_temp 1 5282 271203 6011.3
## - volt_phase_a 1 6284 272206 6015.3
## - current_phase_a 1 6361 272283 6015.6
## - temp_generator_cooling_air 1 7799 273720 6021.3
## - volt_phase_b 1 8350 274271 6023.4
## - temp_top_box 1 8952 274873 6025.8
## - temp_main_box 1 25444 291366 6088.4
## - reactive_power 1 50157 316079 6175.9
## - torque_set_value 1 289537 555458 6782.0
##
## Step: AIC=5991.66
## kw ~ volt_phase_a + volt_phase_b + volt_phase_c + current_phase_a +
## current_phase_b + rotor_rpm + actual_angle_blade_1 + wind_speed +
## actual_angle_blade_2 + actual_angle_blade_3 + wind_deviation +
## gen_1_temp + gen_2_temp + bearing_a_temp + bearing_b_temp +
## ambient_temp + tran_bearing_a_temp + reactive_power + generator_speed_plc +
## torque_actual_value + torque_set_value + temp_nacelle + temp_generator_cooling_air +
## temp_shaft_bearing + high_speed_running_number + tower_acceleration +
## hydraulic_pressure + temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_3 + temp_hub
##
## Df Sum of Sq RSS AIC
## - temp_shaft_bearing 1 367 266652 5991.1
## - wind_deviation 1 423 266707 5991.4
## - tower_acceleration 1 426 266710 5991.4
## - gen_2_temp 1 493 266778 5991.7
## <none> 266285 5991.7
## - volt_phase_c 1 557 266842 5991.9
## + current_phase_c 1 363 265922 5992.2
## - rotor_rpm 1 668 266952 5992.4
## - temp_nacelle 1 709 266994 5992.5
## - torque_actual_value 1 731 267015 5992.6
## + temp_battery_box_axis_2 1 222 266063 5992.8
## - gen_1_temp 1 823 267107 5993.0
## + time 1 102 266183 5993.3
## + nacelle_position 1 32 266253 5993.5
## + gen_rpm 1 20 266264 5993.6
## + tran_temp 1 4 266281 5993.6
## + wind_deviation_one_sec 1 2 266283 5993.7
## - hydraulic_pressure 1 1047 267332 5993.9
## - bearing_a_temp 1 1384 267669 5995.2
## - actual_angle_blade_1 1 1445 267730 5995.5
## - high_speed_running_number 1 1523 267808 5995.8
## - generator_speed_plc 1 2175 268460 5998.4
## - temp_battery_box_axis_1 1 2628 268912 6000.2
## - temp_hub 1 2678 268963 6000.4
## - temp_battery_box_axis_3 1 3607 269892 6004.1
## - bearing_b_temp 1 3744 270029 6004.7
## - actual_angle_blade_2 1 4196 270480 6006.5
## - tran_bearing_a_temp 1 4306 270590 6006.9
## - actual_angle_blade_3 1 4877 271161 6009.2
## - ambient_temp 1 5132 271416 6010.2
## - wind_speed 1 5149 271434 6010.3
## - current_phase_b 1 5692 271977 6012.4
## - volt_phase_a 1 5922 272206 6013.3
## - temp_generator_cooling_air 1 7539 273824 6019.7
## - current_phase_a 1 8062 274346 6021.7
## - volt_phase_b 1 8137 274422 6022.0
## - temp_top_box 1 9184 275469 6026.1
## - temp_main_box 1 27348 293633 6094.8
## - reactive_power 1 50071 316356 6174.9
## - torque_set_value 1 298744 565029 6798.4
##
## Step: AIC=5991.14
## kw ~ volt_phase_a + volt_phase_b + volt_phase_c + current_phase_a +
## current_phase_b + rotor_rpm + actual_angle_blade_1 + wind_speed +
## actual_angle_blade_2 + actual_angle_blade_3 + wind_deviation +
## gen_1_temp + gen_2_temp + bearing_a_temp + bearing_b_temp +
## ambient_temp + tran_bearing_a_temp + reactive_power + generator_speed_plc +
## torque_actual_value + torque_set_value + temp_nacelle + temp_generator_cooling_air +
## high_speed_running_number + tower_acceleration + hydraulic_pressure +
## temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_3 + temp_hub
##
## Df Sum of Sq RSS AIC
## - wind_deviation 1 435 267087 5990.9
## - gen_2_temp 1 492 267144 5991.1
## <none> 266652 5991.1
## - volt_phase_c 1 568 267220 5991.4
## - tower_acceleration 1 580 267232 5991.5
## + temp_shaft_bearing 1 367 266285 5991.7
## + temp_battery_box_axis_2 1 350 266302 5991.7
## + current_phase_c 1 322 266329 5991.8
## - torque_actual_value 1 686 267337 5991.9
## - rotor_rpm 1 696 267347 5991.9
## + time 1 188 266463 5992.4
## - gen_1_temp 1 828 267480 5992.5
## - temp_nacelle 1 908 267560 5992.8
## + nacelle_position 1 67 266585 5992.9
## - hydraulic_pressure 1 959 267610 5993.0
## + gen_rpm 1 22 266630 5993.1
## + tran_temp 1 6 266646 5993.1
## + wind_deviation_one_sec 1 1 266650 5993.1
## - high_speed_running_number 1 1407 268059 5994.8
## - actual_angle_blade_1 1 1709 268361 5996.0
## - bearing_a_temp 1 2112 268763 5997.6
## - generator_speed_plc 1 2257 268909 5998.2
## - temp_battery_box_axis_1 1 2289 268940 5998.3
## - temp_hub 1 2693 269345 5999.9
## - temp_battery_box_axis_3 1 3488 270139 6003.1
## - bearing_b_temp 1 3674 270326 6003.9
## - actual_angle_blade_2 1 4310 270962 6006.4
## - actual_angle_blade_3 1 4609 271261 6007.6
## - ambient_temp 1 4772 271423 6008.2
## - wind_speed 1 5312 271964 6010.3
## - current_phase_b 1 5459 272111 6010.9
## - volt_phase_a 1 5758 272410 6012.1
## - tran_bearing_a_temp 1 6772 273423 6016.1
## - current_phase_a 1 7790 274442 6020.1
## - volt_phase_b 1 7819 274471 6020.2
## - temp_generator_cooling_air 1 7840 274492 6020.3
## - temp_top_box 1 8957 275609 6024.7
## - temp_main_box 1 28601 295253 6098.7
## - reactive_power 1 49738 316389 6173.0
## - torque_set_value 1 314598 581250 6826.8
##
## Step: AIC=5990.9
## kw ~ volt_phase_a + volt_phase_b + volt_phase_c + current_phase_a +
## current_phase_b + rotor_rpm + actual_angle_blade_1 + wind_speed +
## actual_angle_blade_2 + actual_angle_blade_3 + gen_1_temp +
## gen_2_temp + bearing_a_temp + bearing_b_temp + ambient_temp +
## tran_bearing_a_temp + reactive_power + generator_speed_plc +
## torque_actual_value + torque_set_value + temp_nacelle + temp_generator_cooling_air +
## high_speed_running_number + tower_acceleration + hydraulic_pressure +
## temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_3 + temp_hub
##
## Df Sum of Sq RSS AIC
## <none> 267087 5990.9
## - gen_2_temp 1 506 267593 5990.9
## - tower_acceleration 1 531 267619 5991.0
## + wind_deviation 1 435 266652 5991.1
## + wind_deviation_one_sec 1 434 266654 5991.2
## + temp_battery_box_axis_2 1 408 266679 5991.3
## + temp_shaft_bearing 1 380 266707 5991.4
## - volt_phase_c 1 627 267714 5991.4
## - torque_actual_value 1 699 267786 5991.7
## + current_phase_c 1 266 266821 5991.8
## + time 1 191 266897 5992.1
## - rotor_rpm 1 822 267909 5992.2
## - gen_1_temp 1 853 267940 5992.3
## + nacelle_position 1 83 267005 5992.6
## - temp_nacelle 1 948 268035 5992.7
## + gen_rpm 1 6 267081 5992.9
## + tran_temp 1 4 267084 5992.9
## - hydraulic_pressure 1 1098 268185 5993.3
## - high_speed_running_number 1 1502 268590 5994.9
## - actual_angle_blade_1 1 1654 268742 5995.5
## - temp_battery_box_axis_1 1 2171 269258 5997.6
## - bearing_a_temp 1 2279 269367 5998.0
## - generator_speed_plc 1 2457 269544 5998.7
## - temp_hub 1 2682 269769 5999.6
## - temp_battery_box_axis_3 1 3317 270404 6002.2
## - bearing_b_temp 1 3716 270803 6003.8
## - actual_angle_blade_2 1 4247 271334 6005.9
## - actual_angle_blade_3 1 4608 271695 6007.3
## - ambient_temp 1 4781 271869 6008.0
## - wind_speed 1 5162 272249 6009.5
## - volt_phase_a 1 5707 272794 6011.6
## - current_phase_b 1 5757 272844 6011.8
## - tran_bearing_a_temp 1 6930 274017 6016.4
## - volt_phase_b 1 7614 274701 6019.1
## - temp_generator_cooling_air 1 8009 275096 6020.7
## - current_phase_a 1 8156 275243 6021.2
## - temp_top_box 1 9005 276092 6024.5
## - temp_main_box 1 28693 295780 6098.6
## - reactive_power 1 51344 318431 6177.9
## - torque_set_value 1 314175 581262 6824.8step1$anova## Stepwise Model Path
## Analysis of Deviance Table
##
## Initial Model:
## kw ~ turbine_id + outage_id + turbine_type + time + classification +
## volt_phase_a + volt_phase_b + volt_phase_c + current_phase_a +
## current_phase_b + current_phase_c + gen_rpm + rotor_rpm +
## actual_angle_blade_1 + wind_speed + nacelle_position + actual_angle_blade_2 +
## actual_angle_blade_3 + wind_deviation + gen_1_temp + gen_2_temp +
## bearing_a_temp + bearing_b_temp + tran_temp + ambient_temp +
## tran_bearing_a_temp + wind_deviation_one_sec + reactive_power +
## generator_speed_plc + torque_actual_value + torque_set_value +
## temp_nacelle + temp_generator_cooling_air + temp_shaft_bearing +
## high_speed_running_number + tower_acceleration + hydraulic_pressure +
## temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_2 + temp_battery_box_axis_3 + temp_hub
##
## Final Model:
## kw ~ volt_phase_a + volt_phase_b + volt_phase_c + current_phase_a +
## current_phase_b + rotor_rpm + actual_angle_blade_1 + wind_speed +
## actual_angle_blade_2 + actual_angle_blade_3 + gen_1_temp +
## gen_2_temp + bearing_a_temp + bearing_b_temp + ambient_temp +
## tran_bearing_a_temp + reactive_power + generator_speed_plc +
## torque_actual_value + torque_set_value + temp_nacelle + temp_generator_cooling_air +
## high_speed_running_number + tower_acceleration + hydraulic_pressure +
## temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_3 + temp_hub
##
##
## Step Df Deviance Resid. Df Resid. Dev AIC
## 1 1035 265542.7 6002.664
## 2 - classification 0 0.0000000 1035 265542.7 6002.664
## 3 - turbine_type 0 0.0000000 1035 265542.7 6002.664
## 4 - outage_id 0 0.0000000 1035 265542.7 6002.664
## 5 - turbine_id 0 0.0000000 1035 265542.7 6002.664
## 6 - wind_deviation_one_sec 1 0.5708319 1036 265543.2 6000.666
## 7 - gen_rpm 1 6.3822538 1037 265549.6 5998.692
## 8 - nacelle_position 1 26.4491358 1038 265576.1 5996.799
## 9 - tran_temp 1 24.5515909 1039 265600.6 5994.899
## 10 - time 1 121.5803671 1040 265722.2 5993.390
## 11 - temp_battery_box_axis_2 1 199.3942915 1041 265921.6 5992.197
## 12 - current_phase_c 1 362.9925028 1042 266284.6 5991.663
## 13 - temp_shaft_bearing 1 367.1867250 1043 266651.8 5991.145
## 14 - wind_deviation 1 435.4889611 1044 267087.2 5990.899##This is the test for the failed turbine
lm4<-lm(kw~.,data=failed)
step2=stepAIC(lm4,direction="both")## Start: AIC=6002.66
## kw ~ turbine_id + outage_id + turbine_type + time + classification +
## volt_phase_a + volt_phase_b + volt_phase_c + current_phase_a +
## current_phase_b + current_phase_c + gen_rpm + rotor_rpm +
## actual_angle_blade_1 + wind_speed + nacelle_position + actual_angle_blade_2 +
## actual_angle_blade_3 + wind_deviation + gen_1_temp + gen_2_temp +
## bearing_a_temp + bearing_b_temp + tran_temp + ambient_temp +
## tran_bearing_a_temp + wind_deviation_one_sec + reactive_power +
## generator_speed_plc + torque_actual_value + torque_set_value +
## temp_nacelle + temp_generator_cooling_air + temp_shaft_bearing +
## high_speed_running_number + tower_acceleration + hydraulic_pressure +
## temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_2 + temp_battery_box_axis_3 + temp_hub
##
##
## Step: AIC=6002.66
## kw ~ turbine_id + outage_id + turbine_type + time + volt_phase_a +
## volt_phase_b + volt_phase_c + current_phase_a + current_phase_b +
## current_phase_c + gen_rpm + rotor_rpm + actual_angle_blade_1 +
## wind_speed + nacelle_position + actual_angle_blade_2 + actual_angle_blade_3 +
## wind_deviation + gen_1_temp + gen_2_temp + bearing_a_temp +
## bearing_b_temp + tran_temp + ambient_temp + tran_bearing_a_temp +
## wind_deviation_one_sec + reactive_power + generator_speed_plc +
## torque_actual_value + torque_set_value + temp_nacelle + temp_generator_cooling_air +
## temp_shaft_bearing + high_speed_running_number + tower_acceleration +
## hydraulic_pressure + temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_2 + temp_battery_box_axis_3 + temp_hub
##
##
## Step: AIC=6002.66
## kw ~ turbine_id + outage_id + time + volt_phase_a + volt_phase_b +
## volt_phase_c + current_phase_a + current_phase_b + current_phase_c +
## gen_rpm + rotor_rpm + actual_angle_blade_1 + wind_speed +
## nacelle_position + actual_angle_blade_2 + actual_angle_blade_3 +
## wind_deviation + gen_1_temp + gen_2_temp + bearing_a_temp +
## bearing_b_temp + tran_temp + ambient_temp + tran_bearing_a_temp +
## wind_deviation_one_sec + reactive_power + generator_speed_plc +
## torque_actual_value + torque_set_value + temp_nacelle + temp_generator_cooling_air +
## temp_shaft_bearing + high_speed_running_number + tower_acceleration +
## hydraulic_pressure + temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_2 + temp_battery_box_axis_3 + temp_hub
##
##
## Step: AIC=6002.66
## kw ~ turbine_id + time + volt_phase_a + volt_phase_b + volt_phase_c +
## current_phase_a + current_phase_b + current_phase_c + gen_rpm +
## rotor_rpm + actual_angle_blade_1 + wind_speed + nacelle_position +
## actual_angle_blade_2 + actual_angle_blade_3 + wind_deviation +
## gen_1_temp + gen_2_temp + bearing_a_temp + bearing_b_temp +
## tran_temp + ambient_temp + tran_bearing_a_temp + wind_deviation_one_sec +
## reactive_power + generator_speed_plc + torque_actual_value +
## torque_set_value + temp_nacelle + temp_generator_cooling_air +
## temp_shaft_bearing + high_speed_running_number + tower_acceleration +
## hydraulic_pressure + temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_2 + temp_battery_box_axis_3 + temp_hub
##
##
## Step: AIC=6002.66
## kw ~ time + volt_phase_a + volt_phase_b + volt_phase_c + current_phase_a +
## current_phase_b + current_phase_c + gen_rpm + rotor_rpm +
## actual_angle_blade_1 + wind_speed + nacelle_position + actual_angle_blade_2 +
## actual_angle_blade_3 + wind_deviation + gen_1_temp + gen_2_temp +
## bearing_a_temp + bearing_b_temp + tran_temp + ambient_temp +
## tran_bearing_a_temp + wind_deviation_one_sec + reactive_power +
## generator_speed_plc + torque_actual_value + torque_set_value +
## temp_nacelle + temp_generator_cooling_air + temp_shaft_bearing +
## high_speed_running_number + tower_acceleration + hydraulic_pressure +
## temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_2 + temp_battery_box_axis_3 + temp_hub
##
## Df Sum of Sq RSS AIC
## - wind_deviation_one_sec 1 1 265543 6000.7
## - wind_deviation 1 2 265544 6000.7
## - gen_rpm 1 6 265548 6000.7
## - tran_temp 1 26 265569 6000.8
## - nacelle_position 1 29 265571 6000.8
## - generator_speed_plc 1 39 265582 6000.8
## - time 1 110 265653 6001.1
## - temp_shaft_bearing 1 165 265707 6001.3
## - temp_battery_box_axis_2 1 243 265786 6001.6
## - gen_2_temp 1 288 265830 6001.8
## - current_phase_c 1 331 265874 6002.0
## - rotor_rpm 1 338 265881 6002.0
## - tran_bearing_a_temp 1 366 265909 6002.1
## - temp_nacelle 1 417 265960 6002.4
## - tower_acceleration 1 462 266005 6002.5
## <none> 265543 6002.7
## - gen_1_temp 1 564 266106 6002.9
## - hydraulic_pressure 1 599 266141 6003.1
## - torque_actual_value 1 728 266271 6003.6
## - volt_phase_c 1 890 266433 6004.3
## - bearing_a_temp 1 915 266458 6004.4
## - actual_angle_blade_1 1 1176 266719 6005.4
## - temp_battery_box_axis_3 1 1652 267195 6007.3
## - high_speed_running_number 1 1836 267379 6008.1
## - bearing_b_temp 1 2391 267934 6010.3
## - temp_hub 1 2657 268199 6011.4
## - temp_battery_box_axis_1 1 2787 268330 6011.9
## - current_phase_b 1 3183 268726 6013.5
## - actual_angle_blade_2 1 3231 268773 6013.7
## - actual_angle_blade_3 1 3741 269284 6015.7
## - wind_speed 1 3886 269428 6016.3
## - ambient_temp 1 5058 270600 6020.9
## - current_phase_a 1 5475 271018 6022.6
## - volt_phase_a 1 6141 271683 6025.2
## - temp_generator_cooling_air 1 7383 272926 6030.1
## - volt_phase_b 1 8231 273774 6033.5
## - temp_top_box 1 8746 274289 6035.5
## - temp_main_box 1 24815 290358 6096.7
## - reactive_power 1 48457 314000 6180.9
## - torque_set_value 1 286378 551920 6787.2
##
## Step: AIC=6000.67
## kw ~ time + volt_phase_a + volt_phase_b + volt_phase_c + current_phase_a +
## current_phase_b + current_phase_c + gen_rpm + rotor_rpm +
## actual_angle_blade_1 + wind_speed + nacelle_position + actual_angle_blade_2 +
## actual_angle_blade_3 + wind_deviation + gen_1_temp + gen_2_temp +
## bearing_a_temp + bearing_b_temp + tran_temp + ambient_temp +
## tran_bearing_a_temp + reactive_power + generator_speed_plc +
## torque_actual_value + torque_set_value + temp_nacelle + temp_generator_cooling_air +
## temp_shaft_bearing + high_speed_running_number + tower_acceleration +
## hydraulic_pressure + temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_2 + temp_battery_box_axis_3 + temp_hub
##
## Df Sum of Sq RSS AIC
## - gen_rpm 1 6 265550 5998.7
## - tran_temp 1 26 265569 5998.8
## - nacelle_position 1 28 265572 5998.8
## - generator_speed_plc 1 41 265584 5998.8
## - time 1 110 265654 5999.1
## - temp_shaft_bearing 1 165 265708 5999.3
## - temp_battery_box_axis_2 1 243 265786 5999.6
## - gen_2_temp 1 287 265830 5999.8
## - current_phase_c 1 331 265875 6000.0
## - rotor_rpm 1 338 265882 6000.0
## - tran_bearing_a_temp 1 365 265909 6000.1
## - wind_deviation 1 413 265956 6000.3
## - temp_nacelle 1 417 265961 6000.4
## - tower_acceleration 1 462 266005 6000.5
## <none> 265543 6000.7
## - gen_1_temp 1 563 266106 6000.9
## - hydraulic_pressure 1 598 266141 6001.1
## - torque_actual_value 1 729 266273 6001.6
## - volt_phase_c 1 890 266433 6002.3
## - bearing_a_temp 1 915 266458 6002.4
## + wind_deviation_one_sec 1 1 265543 6002.7
## - actual_angle_blade_1 1 1177 266720 6003.4
## - temp_battery_box_axis_3 1 1654 267197 6005.3
## - high_speed_running_number 1 1845 267388 6006.1
## - bearing_b_temp 1 2391 267934 6008.3
## - temp_hub 1 2657 268200 6009.4
## - temp_battery_box_axis_1 1 2787 268331 6009.9
## - current_phase_b 1 3182 268726 6011.5
## - actual_angle_blade_2 1 3231 268774 6011.7
## - actual_angle_blade_3 1 3740 269284 6013.7
## - wind_speed 1 3885 269429 6014.3
## - ambient_temp 1 5057 270600 6018.9
## - current_phase_a 1 5476 271019 6020.6
## - volt_phase_a 1 6140 271683 6023.2
## - temp_generator_cooling_air 1 7385 272928 6028.2
## - volt_phase_b 1 8230 273774 6031.5
## - temp_top_box 1 8746 274289 6033.5
## - temp_main_box 1 24814 290358 6094.7
## - reactive_power 1 48486 314029 6179.0
## - torque_set_value 1 286736 552279 6785.9
##
## Step: AIC=5998.69
## kw ~ time + volt_phase_a + volt_phase_b + volt_phase_c + current_phase_a +
## current_phase_b + current_phase_c + rotor_rpm + actual_angle_blade_1 +
## wind_speed + nacelle_position + actual_angle_blade_2 + actual_angle_blade_3 +
## wind_deviation + gen_1_temp + gen_2_temp + bearing_a_temp +
## bearing_b_temp + tran_temp + ambient_temp + tran_bearing_a_temp +
## reactive_power + generator_speed_plc + torque_actual_value +
## torque_set_value + temp_nacelle + temp_generator_cooling_air +
## temp_shaft_bearing + high_speed_running_number + tower_acceleration +
## hydraulic_pressure + temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_2 + temp_battery_box_axis_3 + temp_hub
##
## Df Sum of Sq RSS AIC
## - nacelle_position 1 26 265576 5996.8
## - tran_temp 1 26 265576 5996.8
## - time 1 114 265664 5997.2
## - temp_shaft_bearing 1 164 265714 5997.4
## - temp_battery_box_axis_2 1 249 265798 5997.7
## - gen_2_temp 1 290 265840 5997.9
## - current_phase_c 1 336 265886 5998.1
## - rotor_rpm 1 341 265890 5998.1
## - tran_bearing_a_temp 1 367 265917 5998.2
## - wind_deviation 1 407 265956 5998.3
## - temp_nacelle 1 421 265970 5998.4
## - tower_acceleration 1 456 266005 5998.5
## <none> 265550 5998.7
## - gen_1_temp 1 567 266116 5999.0
## - hydraulic_pressure 1 592 266142 5999.1
## - torque_actual_value 1 732 266282 5999.7
## - bearing_a_temp 1 914 266464 6000.4
## - volt_phase_c 1 924 266473 6000.4
## + gen_rpm 1 6 265543 6000.7
## + wind_deviation_one_sec 1 1 265548 6000.7
## - actual_angle_blade_1 1 1175 266725 6001.4
## - generator_speed_plc 1 1362 266912 6002.2
## - temp_battery_box_axis_3 1 1660 267210 6003.4
## - high_speed_running_number 1 1841 267391 6004.1
## - bearing_b_temp 1 2387 267936 6006.3
## - temp_hub 1 2661 268210 6007.4
## - temp_battery_box_axis_1 1 2844 268393 6008.1
## - current_phase_b 1 3188 268738 6009.5
## - actual_angle_blade_2 1 3234 268783 6009.7
## - actual_angle_blade_3 1 3755 269304 6011.8
## - wind_speed 1 3998 269547 6012.8
## - ambient_temp 1 5054 270604 6017.0
## - current_phase_a 1 5470 271019 6018.6
## - volt_phase_a 1 6334 271883 6022.0
## - temp_generator_cooling_air 1 7381 272931 6026.2
## - volt_phase_b 1 8371 273921 6030.1
## - temp_top_box 1 8742 274292 6031.5
## - temp_main_box 1 24847 290397 6092.8
## - reactive_power 1 48479 314029 6177.0
## - torque_set_value 1 287353 552903 6785.1
##
## Step: AIC=5996.8
## kw ~ time + volt_phase_a + volt_phase_b + volt_phase_c + current_phase_a +
## current_phase_b + current_phase_c + rotor_rpm + actual_angle_blade_1 +
## wind_speed + actual_angle_blade_2 + actual_angle_blade_3 +
## wind_deviation + gen_1_temp + gen_2_temp + bearing_a_temp +
## bearing_b_temp + tran_temp + ambient_temp + tran_bearing_a_temp +
## reactive_power + generator_speed_plc + torque_actual_value +
## torque_set_value + temp_nacelle + temp_generator_cooling_air +
## temp_shaft_bearing + high_speed_running_number + tower_acceleration +
## hydraulic_pressure + temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_2 + temp_battery_box_axis_3 + temp_hub
##
## Df Sum of Sq RSS AIC
## - tran_temp 1 25 265601 5994.9
## - time 1 114 265690 5995.3
## - temp_shaft_bearing 1 183 265759 5995.5
## - temp_battery_box_axis_2 1 256 265832 5995.8
## - gen_2_temp 1 295 265871 5996.0
## - rotor_rpm 1 322 265898 5996.1
## - current_phase_c 1 335 265911 5996.2
## - tran_bearing_a_temp 1 359 265935 5996.2
## - wind_deviation 1 415 265991 5996.5
## - temp_nacelle 1 419 265995 5996.5
## - tower_acceleration 1 452 266028 5996.6
## <none> 265576 5996.8
## - gen_1_temp 1 573 266149 5997.1
## - hydraulic_pressure 1 604 266180 5997.2
## - torque_actual_value 1 744 266320 5997.8
## - bearing_a_temp 1 893 266469 5998.4
## - volt_phase_c 1 928 266505 5998.6
## + nacelle_position 1 26 265550 5998.7
## + gen_rpm 1 4 265572 5998.8
## + wind_deviation_one_sec 1 1 265575 5998.8
## - actual_angle_blade_1 1 1201 266777 5999.7
## - generator_speed_plc 1 1336 266912 6000.2
## - temp_battery_box_axis_3 1 1680 267256 6001.6
## - high_speed_running_number 1 1834 267410 6002.2
## - bearing_b_temp 1 2367 267943 6004.3
## - temp_hub 1 2652 268228 6005.5
## - temp_battery_box_axis_1 1 2995 268571 6006.9
## - current_phase_b 1 3173 268749 6007.6
## - actual_angle_blade_2 1 3258 268834 6007.9
## - actual_angle_blade_3 1 3741 269317 6009.8
## - wind_speed 1 4115 269691 6011.3
## - ambient_temp 1 5056 270632 6015.1
## - current_phase_a 1 5450 271026 6016.6
## - volt_phase_a 1 6450 272026 6020.6
## - temp_generator_cooling_air 1 7371 272947 6024.2
## - volt_phase_b 1 8525 274101 6028.8
## - temp_top_box 1 8839 274415 6030.0
## - temp_main_box 1 25202 290778 6092.3
## - reactive_power 1 48647 314223 6175.6
## - torque_set_value 1 288047 553623 6784.5
##
## Step: AIC=5994.9
## kw ~ time + volt_phase_a + volt_phase_b + volt_phase_c + current_phase_a +
## current_phase_b + current_phase_c + rotor_rpm + actual_angle_blade_1 +
## wind_speed + actual_angle_blade_2 + actual_angle_blade_3 +
## wind_deviation + gen_1_temp + gen_2_temp + bearing_a_temp +
## bearing_b_temp + ambient_temp + tran_bearing_a_temp + reactive_power +
## generator_speed_plc + torque_actual_value + torque_set_value +
## temp_nacelle + temp_generator_cooling_air + temp_shaft_bearing +
## high_speed_running_number + tower_acceleration + hydraulic_pressure +
## temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_2 + temp_battery_box_axis_3 + temp_hub
##
## Df Sum of Sq RSS AIC
## - time 1 122 265722 5993.4
## - temp_shaft_bearing 1 189 265790 5993.7
## - temp_battery_box_axis_2 1 233 265834 5993.8
## - rotor_rpm 1 314 265915 5994.2
## - gen_2_temp 1 321 265922 5994.2
## - current_phase_c 1 323 265923 5994.2
## - wind_deviation 1 428 266029 5994.6
## - temp_nacelle 1 454 266055 5994.7
## - tower_acceleration 1 479 266080 5994.8
## <none> 265601 5994.9
## - hydraulic_pressure 1 584 266184 5995.3
## - gen_1_temp 1 602 266203 5995.3
## - torque_actual_value 1 744 266344 5995.9
## - bearing_a_temp 1 877 266477 5996.4
## - volt_phase_c 1 912 266512 5996.6
## + tran_temp 1 25 265576 5996.8
## + nacelle_position 1 25 265576 5996.8
## + gen_rpm 1 5 265596 5996.9
## + wind_deviation_one_sec 1 0 265600 5996.9
## - actual_angle_blade_1 1 1202 266803 5997.8
## - generator_speed_plc 1 1316 266917 5998.2
## - temp_battery_box_axis_3 1 1863 267464 6000.4
## - high_speed_running_number 1 1947 267548 6000.8
## - bearing_b_temp 1 2418 268018 6002.6
## - temp_hub 1 2837 268438 6004.3
## - temp_battery_box_axis_1 1 2971 268572 6004.9
## - current_phase_b 1 3149 268750 6005.6
## - actual_angle_blade_2 1 3251 268851 6006.0
## - tran_bearing_a_temp 1 3551 269151 6007.2
## - actual_angle_blade_3 1 3727 269328 6007.9
## - wind_speed 1 4091 269692 6009.3
## - ambient_temp 1 5032 270632 6013.1
## - current_phase_a 1 5445 271045 6014.7
## - volt_phase_a 1 6427 272027 6018.6
## - temp_generator_cooling_air 1 8094 273694 6025.2
## - volt_phase_b 1 8517 274117 6026.8
## - temp_top_box 1 8991 274592 6028.7
## - temp_main_box 1 25348 290949 6090.9
## - reactive_power 1 49354 314955 6176.1
## - torque_set_value 1 289356 554956 6785.1
##
## Step: AIC=5993.39
## kw ~ volt_phase_a + volt_phase_b + volt_phase_c + current_phase_a +
## current_phase_b + current_phase_c + rotor_rpm + actual_angle_blade_1 +
## wind_speed + actual_angle_blade_2 + actual_angle_blade_3 +
## wind_deviation + gen_1_temp + gen_2_temp + bearing_a_temp +
## bearing_b_temp + ambient_temp + tran_bearing_a_temp + reactive_power +
## generator_speed_plc + torque_actual_value + torque_set_value +
## temp_nacelle + temp_generator_cooling_air + temp_shaft_bearing +
## high_speed_running_number + tower_acceleration + hydraulic_pressure +
## temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_2 + temp_battery_box_axis_3 + temp_hub
##
## Df Sum of Sq RSS AIC
## - temp_battery_box_axis_2 1 199 265922 5992.2
## - temp_shaft_bearing 1 276 265998 5992.5
## - current_phase_c 1 340 266063 5992.8
## - temp_nacelle 1 366 266089 5992.9
## - gen_2_temp 1 368 266091 5992.9
## - rotor_rpm 1 405 266127 5993.0
## - wind_deviation 1 433 266156 5993.1
## - tower_acceleration 1 493 266215 5993.4
## <none> 265722 5993.4
## - gen_1_temp 1 663 266386 5994.1
## - torque_actual_value 1 729 266451 5994.3
## - volt_phase_c 1 795 266518 5994.6
## + time 1 122 265601 5994.9
## - hydraulic_pressure 1 904 266626 5995.0
## + tran_temp 1 33 265690 5995.3
## + nacelle_position 1 23 265699 5995.3
## - bearing_a_temp 1 981 266703 5995.4
## + gen_rpm 1 9 265713 5995.4
## + wind_deviation_one_sec 1 1 265722 5995.4
## - actual_angle_blade_1 1 1258 266980 5996.5
## - generator_speed_plc 1 1524 267246 5997.5
## - temp_battery_box_axis_3 1 1758 267480 5998.5
## - high_speed_running_number 1 1953 267675 5999.3
## - temp_hub 1 2747 268469 6002.4
## - bearing_b_temp 1 2833 268555 6002.8
## - temp_battery_box_axis_1 1 2851 268573 6002.9
## - actual_angle_blade_2 1 3397 269119 6005.0
## - current_phase_b 1 3581 269303 6005.8
## - tran_bearing_a_temp 1 3628 269351 6006.0
## - actual_angle_blade_3 1 3856 269578 6006.9
## - wind_speed 1 4129 269851 6008.0
## - ambient_temp 1 5463 271185 6013.3
## - current_phase_a 1 6338 272060 6016.7
## - volt_phase_a 1 6348 272071 6016.8
## - temp_generator_cooling_air 1 7972 273695 6023.2
## - volt_phase_b 1 8408 274130 6024.9
## - temp_top_box 1 8897 274619 6026.8
## - temp_main_box 1 25493 291215 6089.9
## - reactive_power 1 49456 315178 6174.9
## - torque_set_value 1 289442 555164 6783.5
##
## Step: AIC=5992.2
## kw ~ volt_phase_a + volt_phase_b + volt_phase_c + current_phase_a +
## current_phase_b + current_phase_c + rotor_rpm + actual_angle_blade_1 +
## wind_speed + actual_angle_blade_2 + actual_angle_blade_3 +
## wind_deviation + gen_1_temp + gen_2_temp + bearing_a_temp +
## bearing_b_temp + ambient_temp + tran_bearing_a_temp + reactive_power +
## generator_speed_plc + torque_actual_value + torque_set_value +
## temp_nacelle + temp_generator_cooling_air + temp_shaft_bearing +
## high_speed_running_number + tower_acceleration + hydraulic_pressure +
## temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_3 + temp_hub
##
## Df Sum of Sq RSS AIC
## - current_phase_c 1 363 266285 5991.7
## - temp_shaft_bearing 1 408 266329 5991.8
## - tower_acceleration 1 467 266388 5992.1
## - wind_deviation 1 482 266403 5992.1
## <none> 265922 5992.2
## - gen_2_temp 1 515 266437 5992.3
## - rotor_rpm 1 581 266503 5992.5
## - temp_nacelle 1 582 266503 5992.5
## - torque_actual_value 1 730 266652 5993.1
## - volt_phase_c 1 788 266709 5993.4
## + temp_battery_box_axis_2 1 199 265722 5993.4
## - gen_1_temp 1 864 266785 5993.7
## + time 1 88 265834 5993.8
## + nacelle_position 1 32 265889 5994.1
## - hydraulic_pressure 1 970 266891 5994.1
## + gen_rpm 1 13 265908 5994.1
## + wind_deviation_one_sec 1 1 265921 5994.2
## + tran_temp 1 0 265921 5994.2
## - bearing_a_temp 1 1212 267134 5995.1
## - actual_angle_blade_1 1 1353 267275 5995.7
## - high_speed_running_number 1 1886 267807 5997.8
## - generator_speed_plc 1 1933 267854 5998.0
## - temp_hub 1 2553 268474 6000.5
## - temp_battery_box_axis_1 1 2781 268703 6001.4
## - bearing_b_temp 1 3306 269228 6003.5
## - temp_battery_box_axis_3 1 3625 269547 6004.8
## - actual_angle_blade_2 1 3633 269554 6004.8
## - current_phase_b 1 3669 269591 6004.9
## - actual_angle_blade_3 1 4038 269960 6006.4
## - tran_bearing_a_temp 1 4296 270217 6007.4
## - wind_speed 1 4352 270274 6007.6
## - ambient_temp 1 5282 271203 6011.3
## - volt_phase_a 1 6284 272206 6015.3
## - current_phase_a 1 6361 272283 6015.6
## - temp_generator_cooling_air 1 7799 273720 6021.3
## - volt_phase_b 1 8350 274271 6023.4
## - temp_top_box 1 8952 274873 6025.8
## - temp_main_box 1 25444 291366 6088.4
## - reactive_power 1 50157 316079 6175.9
## - torque_set_value 1 289537 555458 6782.0
##
## Step: AIC=5991.66
## kw ~ volt_phase_a + volt_phase_b + volt_phase_c + current_phase_a +
## current_phase_b + rotor_rpm + actual_angle_blade_1 + wind_speed +
## actual_angle_blade_2 + actual_angle_blade_3 + wind_deviation +
## gen_1_temp + gen_2_temp + bearing_a_temp + bearing_b_temp +
## ambient_temp + tran_bearing_a_temp + reactive_power + generator_speed_plc +
## torque_actual_value + torque_set_value + temp_nacelle + temp_generator_cooling_air +
## temp_shaft_bearing + high_speed_running_number + tower_acceleration +
## hydraulic_pressure + temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_3 + temp_hub
##
## Df Sum of Sq RSS AIC
## - temp_shaft_bearing 1 367 266652 5991.1
## - wind_deviation 1 423 266707 5991.4
## - tower_acceleration 1 426 266710 5991.4
## - gen_2_temp 1 493 266778 5991.7
## <none> 266285 5991.7
## - volt_phase_c 1 557 266842 5991.9
## + current_phase_c 1 363 265922 5992.2
## - rotor_rpm 1 668 266952 5992.4
## - temp_nacelle 1 709 266994 5992.5
## - torque_actual_value 1 731 267015 5992.6
## + temp_battery_box_axis_2 1 222 266063 5992.8
## - gen_1_temp 1 823 267107 5993.0
## + time 1 102 266183 5993.3
## + nacelle_position 1 32 266253 5993.5
## + gen_rpm 1 20 266264 5993.6
## + tran_temp 1 4 266281 5993.6
## + wind_deviation_one_sec 1 2 266283 5993.7
## - hydraulic_pressure 1 1047 267332 5993.9
## - bearing_a_temp 1 1384 267669 5995.2
## - actual_angle_blade_1 1 1445 267730 5995.5
## - high_speed_running_number 1 1523 267808 5995.8
## - generator_speed_plc 1 2175 268460 5998.4
## - temp_battery_box_axis_1 1 2628 268912 6000.2
## - temp_hub 1 2678 268963 6000.4
## - temp_battery_box_axis_3 1 3607 269892 6004.1
## - bearing_b_temp 1 3744 270029 6004.7
## - actual_angle_blade_2 1 4196 270480 6006.5
## - tran_bearing_a_temp 1 4306 270590 6006.9
## - actual_angle_blade_3 1 4877 271161 6009.2
## - ambient_temp 1 5132 271416 6010.2
## - wind_speed 1 5149 271434 6010.3
## - current_phase_b 1 5692 271977 6012.4
## - volt_phase_a 1 5922 272206 6013.3
## - temp_generator_cooling_air 1 7539 273824 6019.7
## - current_phase_a 1 8062 274346 6021.7
## - volt_phase_b 1 8137 274422 6022.0
## - temp_top_box 1 9184 275469 6026.1
## - temp_main_box 1 27348 293633 6094.8
## - reactive_power 1 50071 316356 6174.9
## - torque_set_value 1 298744 565029 6798.4
##
## Step: AIC=5991.14
## kw ~ volt_phase_a + volt_phase_b + volt_phase_c + current_phase_a +
## current_phase_b + rotor_rpm + actual_angle_blade_1 + wind_speed +
## actual_angle_blade_2 + actual_angle_blade_3 + wind_deviation +
## gen_1_temp + gen_2_temp + bearing_a_temp + bearing_b_temp +
## ambient_temp + tran_bearing_a_temp + reactive_power + generator_speed_plc +
## torque_actual_value + torque_set_value + temp_nacelle + temp_generator_cooling_air +
## high_speed_running_number + tower_acceleration + hydraulic_pressure +
## temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_3 + temp_hub
##
## Df Sum of Sq RSS AIC
## - wind_deviation 1 435 267087 5990.9
## - gen_2_temp 1 492 267144 5991.1
## <none> 266652 5991.1
## - volt_phase_c 1 568 267220 5991.4
## - tower_acceleration 1 580 267232 5991.5
## + temp_shaft_bearing 1 367 266285 5991.7
## + temp_battery_box_axis_2 1 350 266302 5991.7
## + current_phase_c 1 322 266329 5991.8
## - torque_actual_value 1 686 267337 5991.9
## - rotor_rpm 1 696 267347 5991.9
## + time 1 188 266463 5992.4
## - gen_1_temp 1 828 267480 5992.5
## - temp_nacelle 1 908 267560 5992.8
## + nacelle_position 1 67 266585 5992.9
## - hydraulic_pressure 1 959 267610 5993.0
## + gen_rpm 1 22 266630 5993.1
## + tran_temp 1 6 266646 5993.1
## + wind_deviation_one_sec 1 1 266650 5993.1
## - high_speed_running_number 1 1407 268059 5994.8
## - actual_angle_blade_1 1 1709 268361 5996.0
## - bearing_a_temp 1 2112 268763 5997.6
## - generator_speed_plc 1 2257 268909 5998.2
## - temp_battery_box_axis_1 1 2289 268940 5998.3
## - temp_hub 1 2693 269345 5999.9
## - temp_battery_box_axis_3 1 3488 270139 6003.1
## - bearing_b_temp 1 3674 270326 6003.9
## - actual_angle_blade_2 1 4310 270962 6006.4
## - actual_angle_blade_3 1 4609 271261 6007.6
## - ambient_temp 1 4772 271423 6008.2
## - wind_speed 1 5312 271964 6010.3
## - current_phase_b 1 5459 272111 6010.9
## - volt_phase_a 1 5758 272410 6012.1
## - tran_bearing_a_temp 1 6772 273423 6016.1
## - current_phase_a 1 7790 274442 6020.1
## - volt_phase_b 1 7819 274471 6020.2
## - temp_generator_cooling_air 1 7840 274492 6020.3
## - temp_top_box 1 8957 275609 6024.7
## - temp_main_box 1 28601 295253 6098.7
## - reactive_power 1 49738 316389 6173.0
## - torque_set_value 1 314598 581250 6826.8
##
## Step: AIC=5990.9
## kw ~ volt_phase_a + volt_phase_b + volt_phase_c + current_phase_a +
## current_phase_b + rotor_rpm + actual_angle_blade_1 + wind_speed +
## actual_angle_blade_2 + actual_angle_blade_3 + gen_1_temp +
## gen_2_temp + bearing_a_temp + bearing_b_temp + ambient_temp +
## tran_bearing_a_temp + reactive_power + generator_speed_plc +
## torque_actual_value + torque_set_value + temp_nacelle + temp_generator_cooling_air +
## high_speed_running_number + tower_acceleration + hydraulic_pressure +
## temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_3 + temp_hub
##
## Df Sum of Sq RSS AIC
## <none> 267087 5990.9
## - gen_2_temp 1 506 267593 5990.9
## - tower_acceleration 1 531 267619 5991.0
## + wind_deviation 1 435 266652 5991.1
## + wind_deviation_one_sec 1 434 266654 5991.2
## + temp_battery_box_axis_2 1 408 266679 5991.3
## + temp_shaft_bearing 1 380 266707 5991.4
## - volt_phase_c 1 627 267714 5991.4
## - torque_actual_value 1 699 267786 5991.7
## + current_phase_c 1 266 266821 5991.8
## + time 1 191 266897 5992.1
## - rotor_rpm 1 822 267909 5992.2
## - gen_1_temp 1 853 267940 5992.3
## + nacelle_position 1 83 267005 5992.6
## - temp_nacelle 1 948 268035 5992.7
## + gen_rpm 1 6 267081 5992.9
## + tran_temp 1 4 267084 5992.9
## - hydraulic_pressure 1 1098 268185 5993.3
## - high_speed_running_number 1 1502 268590 5994.9
## - actual_angle_blade_1 1 1654 268742 5995.5
## - temp_battery_box_axis_1 1 2171 269258 5997.6
## - bearing_a_temp 1 2279 269367 5998.0
## - generator_speed_plc 1 2457 269544 5998.7
## - temp_hub 1 2682 269769 5999.6
## - temp_battery_box_axis_3 1 3317 270404 6002.2
## - bearing_b_temp 1 3716 270803 6003.8
## - actual_angle_blade_2 1 4247 271334 6005.9
## - actual_angle_blade_3 1 4608 271695 6007.3
## - ambient_temp 1 4781 271869 6008.0
## - wind_speed 1 5162 272249 6009.5
## - volt_phase_a 1 5707 272794 6011.6
## - current_phase_b 1 5757 272844 6011.8
## - tran_bearing_a_temp 1 6930 274017 6016.4
## - volt_phase_b 1 7614 274701 6019.1
## - temp_generator_cooling_air 1 8009 275096 6020.7
## - current_phase_a 1 8156 275243 6021.2
## - temp_top_box 1 9005 276092 6024.5
## - temp_main_box 1 28693 295780 6098.6
## - reactive_power 1 51344 318431 6177.9
## - torque_set_value 1 314175 581262 6824.8step2$anova## Stepwise Model Path
## Analysis of Deviance Table
##
## Initial Model:
## kw ~ turbine_id + outage_id + turbine_type + time + classification +
## volt_phase_a + volt_phase_b + volt_phase_c + current_phase_a +
## current_phase_b + current_phase_c + gen_rpm + rotor_rpm +
## actual_angle_blade_1 + wind_speed + nacelle_position + actual_angle_blade_2 +
## actual_angle_blade_3 + wind_deviation + gen_1_temp + gen_2_temp +
## bearing_a_temp + bearing_b_temp + tran_temp + ambient_temp +
## tran_bearing_a_temp + wind_deviation_one_sec + reactive_power +
## generator_speed_plc + torque_actual_value + torque_set_value +
## temp_nacelle + temp_generator_cooling_air + temp_shaft_bearing +
## high_speed_running_number + tower_acceleration + hydraulic_pressure +
## temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_2 + temp_battery_box_axis_3 + temp_hub
##
## Final Model:
## kw ~ volt_phase_a + volt_phase_b + volt_phase_c + current_phase_a +
## current_phase_b + rotor_rpm + actual_angle_blade_1 + wind_speed +
## actual_angle_blade_2 + actual_angle_blade_3 + gen_1_temp +
## gen_2_temp + bearing_a_temp + bearing_b_temp + ambient_temp +
## tran_bearing_a_temp + reactive_power + generator_speed_plc +
## torque_actual_value + torque_set_value + temp_nacelle + temp_generator_cooling_air +
## high_speed_running_number + tower_acceleration + hydraulic_pressure +
## temp_main_box + temp_top_box + temp_battery_box_axis_1 +
## temp_battery_box_axis_3 + temp_hub
##
##
## Step Df Deviance Resid. Df Resid. Dev AIC
## 1 1035 265542.7 6002.664
## 2 - classification 0 0.0000000 1035 265542.7 6002.664
## 3 - turbine_type 0 0.0000000 1035 265542.7 6002.664
## 4 - outage_id 0 0.0000000 1035 265542.7 6002.664
## 5 - turbine_id 0 0.0000000 1035 265542.7 6002.664
## 6 - wind_deviation_one_sec 1 0.5708319 1036 265543.2 6000.666
## 7 - gen_rpm 1 6.3822538 1037 265549.6 5998.692
## 8 - nacelle_position 1 26.4491358 1038 265576.1 5996.799
## 9 - tran_temp 1 24.5515909 1039 265600.6 5994.899
## 10 - time 1 121.5803671 1040 265722.2 5993.390
## 11 - temp_battery_box_axis_2 1 199.3942915 1041 265921.6 5992.197
## 12 - current_phase_c 1 362.9925028 1042 266284.6 5991.663
## 13 - temp_shaft_bearing 1 367.1867250 1043 266651.8 5991.145
## 14 - wind_deviation 1 435.4889611 1044 267087.2 5990.899The results suggest that the significant variables are: wind_deviation_one_sec,gen_rpm,nacelle_position,tran_temperature,time,temp_battery_box_axis_2,current_phase_c,temp_shaft_bearing,wind_deviation.
Both the models end up with exactly similar significant variables in the step-wise linear regression model.
##For the failed turbine
confint(lm3)## 2.5 % 97.5 %
## (Intercept) -1.533811e+03 -1.680606e+02
## turbine_id NA NA
## outage_id NA NA
## turbine_type NA NA
## time -7.890432e-04 3.938594e-04
## classification NA NA
## volt_phase_a 9.485593e+00 2.219092e+01
## volt_phase_b -1.184591e+01 -5.749988e+00
## volt_phase_c -1.050055e+01 2.725328e-01
## current_phase_a 2.025749e+00 5.017435e+00
## current_phase_b -6.445191e+00 -1.833186e+00
## current_phase_c -9.454934e-01 3.545694e+00
## gen_rpm -2.313683e+00 1.983521e+00
## rotor_rpm -3.306918e+01 8.653764e+00
## actual_angle_blade_1 1.354016e+00 3.105580e+01
## wind_speed -5.117777e+00 -1.686790e+00
## nacelle_position -1.226174e-02 8.696230e-03
## actual_angle_blade_2 -5.426482e+01 -1.562055e+01
## actual_angle_blade_3 1.023962e+01 3.188809e+01
## wind_deviation -5.997922e+00 5.504940e+00
## gen_1_temp -2.215589e+00 1.589363e+01
## gen_2_temp -1.431711e+01 4.280575e+00
## bearing_a_temp -2.252014e+00 4.283884e-02
## bearing_b_temp 2.948049e-01 1.355663e+00
## tran_temp -1.807611e+00 2.509793e+00
## ambient_temp 8.694411e-01 2.246598e+00
## tran_bearing_a_temp -3.461127e+00 8.420444e-01
## wind_deviation_one_sec -5.637629e+00 5.915341e+00
## reactive_power 2.757455e-01 3.676047e-01
## generator_speed_plc -1.783521e+00 2.672167e+00
## torque_actual_value -1.254801e-02 1.647384e-01
## torque_set_value 6.445145e+00 7.249474e+00
## temp_nacelle -4.367593e-01 2.059490e+00
## temp_generator_cooling_air -2.931882e+00 -1.361416e+00
## temp_shaft_bearing -4.259491e+00 1.790001e+00
## high_speed_running_number 5.278907e-01 3.433348e+00
## tower_acceleration -8.688688e-02 1.631615e-02
## hydraulic_pressure -7.041473e-01 5.653156e+00
## temp_main_box -3.974424e+00 -2.652242e+00
## temp_top_box -2.029085e+00 -1.008283e+00
## temp_battery_box_axis_1 3.515875e+00 1.386024e+01
## temp_battery_box_axis_2 -1.004058e+01 3.383614e+00
## temp_battery_box_axis_3 -1.212210e+01 -1.549435e+00
## temp_hub 1.484932e+00 6.125889e+00## For the normal one
confint(lm4)## 2.5 % 97.5 %
## (Intercept) -1.533811e+03 -1.680606e+02
## turbine_id NA NA
## outage_id NA NA
## turbine_type NA NA
## time -7.890432e-04 3.938594e-04
## classification NA NA
## volt_phase_a 9.485593e+00 2.219092e+01
## volt_phase_b -1.184591e+01 -5.749988e+00
## volt_phase_c -1.050055e+01 2.725328e-01
## current_phase_a 2.025749e+00 5.017435e+00
## current_phase_b -6.445191e+00 -1.833186e+00
## current_phase_c -9.454934e-01 3.545694e+00
## gen_rpm -2.313683e+00 1.983521e+00
## rotor_rpm -3.306918e+01 8.653764e+00
## actual_angle_blade_1 1.354016e+00 3.105580e+01
## wind_speed -5.117777e+00 -1.686790e+00
## nacelle_position -1.226174e-02 8.696230e-03
## actual_angle_blade_2 -5.426482e+01 -1.562055e+01
## actual_angle_blade_3 1.023962e+01 3.188809e+01
## wind_deviation -5.997922e+00 5.504940e+00
## gen_1_temp -2.215589e+00 1.589363e+01
## gen_2_temp -1.431711e+01 4.280575e+00
## bearing_a_temp -2.252014e+00 4.283884e-02
## bearing_b_temp 2.948049e-01 1.355663e+00
## tran_temp -1.807611e+00 2.509793e+00
## ambient_temp 8.694411e-01 2.246598e+00
## tran_bearing_a_temp -3.461127e+00 8.420444e-01
## wind_deviation_one_sec -5.637629e+00 5.915341e+00
## reactive_power 2.757455e-01 3.676047e-01
## generator_speed_plc -1.783521e+00 2.672167e+00
## torque_actual_value -1.254801e-02 1.647384e-01
## torque_set_value 6.445145e+00 7.249474e+00
## temp_nacelle -4.367593e-01 2.059490e+00
## temp_generator_cooling_air -2.931882e+00 -1.361416e+00
## temp_shaft_bearing -4.259491e+00 1.790001e+00
## high_speed_running_number 5.278907e-01 3.433348e+00
## tower_acceleration -8.688688e-02 1.631615e-02
## hydraulic_pressure -7.041473e-01 5.653156e+00
## temp_main_box -3.974424e+00 -2.652242e+00
## temp_top_box -2.029085e+00 -1.008283e+00
## temp_battery_box_axis_1 3.515875e+00 1.386024e+01
## temp_battery_box_axis_2 -1.004058e+01 3.383614e+00
## temp_battery_box_axis_3 -1.212210e+01 -1.549435e+00
## temp_hub 1.484932e+00 6.125889e+00