A transient voltage security control strategy for the wind power centralized system

It is significant to research the voltage security of the wind power centralized system (WPCS) for the effective development of the large scale clustering wind energy resources. Firstly, an actual WPCS in the Three-North regions of China is employed to analyze the voltage security problem quantitatively. By analyzing the reactive power response features of the wind turbines and the reactive power sources, the time domain simulation method is utilized to discuss the main causes and the development process of the WPCS transient voltage security accident. On this basis, a transient voltage security control strategy of the WPCS is proposed. The simulation results show that the proposed control strategy can suppress the occurrence of the wind turbines' cascading trip-off which is caused by the excessive reactive power.