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Table 4
Listing of the various methods in the increasing order of model error, with brief descriptions of the practical advantages associated with such methods in the erection and upkeep of the physical systems for data collection for wind speed forecasting at the height of 80 m.
| Sl. No. | Method | SVR model performance in RMSE (m/s) | Requirements/advantages/disadvantages with regard to setting up of the wind measuring mast system |
|---|---|---|---|
| 1 | Method 1 | 0.93 | Erection and upkeep of a wind mast of 80 m height at the location of interest are necessary during the training period as well as the whole future testing period. Advantage: Highest forecast accuracy; Disadvantage: Most difficult mast system. |
| 2 | Method 2 | 0.97 | The Establishment of an 80 m high wind mast at the location of interest is required during the training period of the first one year. Wind speed data are taken at 80 m and 50 m heights during this period for the training of the model. During the subsequent testing periods, a wind mast of 50 m height only needs to be retained. |
| 3 | Method 5 | 1.06 | Erection and upkeep of an 80 m wind mast at one reference location within the geographical area of the wind regime are required only for the training period of an initial one year. Wind speed data are taken from this wind mast at 80 m and 50 m heights during this period for training the model. This trained model is employed at any other location of interest, where a wind mast of 50 m height only is needed to be erected and maintained. |
| 4 | Method 3 | 1.17 | A wind mast of 50 m height only is required to be established and retained at a location of interest and wind data from anemometers fitted to it at 50 m and 20 m heights are collected, using which the time ahead wind speeds at the higher altitude are predicted. |
| 5 | Method 4 | 1.67 | A wind mast of 50 m height is to be established and retained for the training period of the first one-year at the location of interest and wind data at 50 m and 20 m heights are to be collected from it during this period. In the subsequent testing periods, a shorter wind mast of 20 m height only needs to be retained. Advantage: Simplest mast system; Disadvantage: Lowest forecast accuracy. |
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