Coordinate control of active and reactive power in wind integration area to prevent cascading trip fault

Large-scale wind power centralized integration into power grid via long transmission lines is the major way to use wind energy in China. However, cascading trip faults in wind power centralized integration area brings a great new challenge for secure operation of power grid. Due to the complexity of SCOPF, this paper proposes a N-1 sensitivity based method to coordinately control active and reactive power in wind power integration area to prevent cascading trip fault. The control center aims to minimize wind power curtailment and guarantees both normal and secure operation. This control strategy also suppresses wind farms´ voltage fluctuation and minimizes the regulation of reactive power. A real system in Northern China is studied to verify the effectiveness of the proposed method in this work, and an excellent performance has been observed by Monte Carlo method.