Basic Information

Select voltage level and number of main transformers for the substation according to the following suggestions:

• Voltage level

  Select 35 kV when wind farm capacity ≤ 40MW.

  Select 110 kV when wind farm capacity ≤ 120MW.

  Select 220 kV when wind farm capacity ≥ 120MW.

  The voltage levels listed above are those commonly used in the configuration. The actual determination of voltage level should be based on consideration of accessible voltage level in the adjacent grid and the reply and suggestion from the ultimate access system.

• Number of main transformers

  If the entire wind farm is planned to be constructed in one construction, select one main transformer (For large-scale capacity (larger than 200 MW) wind farm, select no less than two main transformers and verify with electric professionals before your selection.)

  If the entire wind farm is planned to be constructed by stages and the construction time of later stages is close to that of the first stage (within one year), select one main transformer (For large-scale capacity (larger than 200 MW) wind farm, select no less than two main transformers and verify with electric professionals before your selection.)

  If the entire wind farm is planned to be constructed by stages and the construction time gap between the first stage and later stages is long, select two main transformers.

• Current-period and long-period capacity

  Distinguish the wind farm current-period capacity and long-period capacity from substation's current-period capacity and long-period capacity. The values you set here are the substation's current-period and long-period capacity, that is, the main transformer capacity put into operation in current period and that in future period.