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Table 1 An overview of the progressive feature selection for each target time series

From: Net load forecasting using different aggregation levels

  Target time series to be forecast
Onshore wind Offshore wind Solar Demand Net load Supply
Surface net solar radiation north Germany    14   34 32
Surface net solar radiation central Germany    9   12 14
Surface net solar radiation south Germany    2   2 2
Surface net thermal radiation north Germany    6   17 17
Surface net thermal radiation central Germany    3   27 20
Surface net thermal radiation south Germany    7   13 9
Temperature 2 m over ground north Germany    10   28 8
Temperature 2 m over ground central Germany    12   14 26
Temperature 2 m over ground south Germany    8   10 7
Eastward wind velocity Baltic sea   6    24 11
Eastward wind velocity North sea   4    31 31
Northward wind velocity Baltic sea   3    32 27
Northward wind velocity North sea   8    30 29
Resulting wind velocity Baltic sea   2    9 6
Resulting wind velocity North sea   2    6 2
Eastward wind velocity north Germany 5     35 24
Eastward wind velocity central Germany 13     18 18
Eastward wind velocity south Germany 4     11 13
Northward wind velocity north Germany 8     36 12
Northward wind velocity central Germany 9     20 23
Northward wind velocity south Germany 6     26 19
Resulting wind velocity north Germany 2     2 4
Resulting wind velocity central Germany 2     3 3
Resulting wind velocity south Germany 3     8 5
One hot encoded weekdays     5 5  
One hot encoded hours 18 15 5 11 7 16
Public holiday     3 15  
Partial public holiday of Germany     12 37  
Summertime 19 16 4 13 33 15
Historical values (lags) for the last 0 h 7a 5b 2c 2d 4e 10f
Historical values (lags) for the last 24 h 15a 12b 13c 10d 21e 33f
Historical values (lags) for the last 48 h 17a 9b 19c 8d 29e 25f
Historical values (lags) for the last 72 h 10a 11b 15c 6d 23e 34f
Historical values (lags) for the last 96 h 14a 14b 17c 4d 19e 22f
Historical values (lags) for the last 120 h 12a 7b 11c 7d 25e 30f
Historical values (lags) for the last 144 h 16a 10b 16 c 2d 16e 28f
Historical values (lags) for the last 168 h 11a 13b 18c 9d 22e 21f
  1. Starting with a large number of features we iteratively reduce the number of features that can be selected. The number in each row indicates the smallest subset of features that still included the given feature. We perform feature selection until a minimal feature set size of 2
  2. aFor onshore wind, the lags correspond to historical onshore wind values
  3. bFor offshore wind, the lags correspond to historical offshore wind values
  4. cFor solar, the lags correspond to historical solar values
  5. dFor demand the lags correspond to historical demand values
  6. eFor net load, the lags correspond to historical net load values
  7. fFor supply, the lags correspond to historical supply values