Coordinative strategy of reactive power and voltage control for improving static voltage stability of wind power centralized system

Abstract

In allusion to the reactive power and voltage issue that the integrated wind farm cluster, which is regarded as a weakly connected sending-end system, has to be faced with, the static voltage stability evaluation index for large-scale wind power centralized system is researched, and on this basis a coordinated strategy for reactive power and voltage control to improve the static voltage stability of wind power centralized system is proposed. The prime-dual interior point filter algorithm is used in the proposed strategy to solve the multi-objective optimization control model. Through coordinative control of various reactive power and voltage regulation equipment configured in wind farms and centralized station, the voltage distribution within the wind power centralized system can be equalized while the voltage control instruction of pilot node is satisfied to enhance the reactive power margin of dynamic equipment, thus the static voltage stability of wind power centralized system can be improved. The effectiveness of the proposed control strategy is validated by simulation results of a certain wind farm centralized system in North China.