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Contribution of Variable-Speed Wind Turbines to Voltage Control

2002; SAGE Publishing; Volume: 26; Issue: 6 Linguagem: Inglês

10.1260/030952402765173349

2048-402X

Pablo Ledesma, Julio Usaola,

Electric Motor Design and Analysis

Variable speed, grid connected, wind turbines open new possibilities for voltage control, because they use electronic converters, which may regulate the reactive power interchange with the grid. This paper proposes two voltage control schemes for variable speed wind turbines with double-fed induction generator. The first scheme acts on the wind-turbine power factor, while the latter acts directly on the converter current. Advantages and drawbacks of both techniques are discussed. Both control techniques have been tested by simulations of a base case, which represent a synchronous generator, a wind farm and a local load, and several disturbances such as the loss of compensator capacitors.