Abstract
In large wind farms, the mutual interactions between the power converter control systems and passive components may result in harmonic instability and resonance frequencies at a various frequency range. This paper presents an optimized parameter design of the power converter controllers in large wind farms in order to reduce the resonance probability and guarantee harmonic stability. In fact, a general multiobjective optimization procedure based on the genetic algorithm is proposed to set the poles of the wind farm in a desired location in order to minimize the number of the resonance frequencies and to improve the harmonic stability. Time-domain simulations of a 400-MW wind farm in the PSCAD/EMTDC environment demonstrate the effectiveness of the proposed design technique.
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