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Method and apparatus for controlling the feed of reactive power in a wind power generation system

  • US 8,615,331 B2
  • Filed: 12/11/2009
  • Issued: 12/24/2013
  • Est. Priority Date: 12/12/2008
  • Status: Active Grant
First Claim
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1. A method for controlling a feed of reactive power in a wind power generation system to a grid, wherein the wind power generation system is connected to the grid at a point of connection, comprising:

  • injecting a disturbance at the point of connection;

    determining a Q-V characteristic for the grid at the point of connection based on the injected disturbance at the point of connection, wherein the Q-V characteristic is a relation between reactive power injected to the grid at the point of connection and grid voltage at the point of connection;

    determining a minimum reactive current, IQmin; and

    controlling the feeding of reactive power to the grid based on the Q-V characteristic, wherein controlling the feeding of reactive power to the grid comprises maintaining the reactive current greater than the minimum reactive current, IQmin.

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