Grid Connection

Please refer to Grid Connection section for general information on grid connection.

For large wind turbines, connection to the grid will probably take the form of "direct grid connection" to the 11kV network, as explained in the Grid Connection section.

Some aspects to be considered for grid connection are:

  1. Power quality - reactive power, voltage fluctuations during switching operations (cut-in and cut-out), voltage fluctuations during operation (e.g. due to fluctuations in wind speed).
  2. Low voltage ride-through - As the electricity grid is subject to voltage dips, the low voltage ride-through requirements in certain countries specifiy the voltage dip thresholds above which the wind turbines are not allowed to disconnect.
  3. Fault current contribution by the wind turbine in case of a fault in the grid.

For a general appreciation of grid connection aspects of large wind turbines, a reference is the information on the website of the British Wind Energy Association relating to grid connection considerations of large wind turbines in the UK:
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