Based on recent years’ frequent outage of large scale wind power by high voltage during voltage recovery period after grid fault

the high voltage phenomena after grid fault is analyzed from two aspects

one is the dynamic reactive power control strategy during low voltage ride through (LVRT) of wind turbines

the other is control characteristics of reactive power compensation devices in wind farms. It is verified by field test data on wind turbines that the dynamic voltage control strategy could affect terminal voltage of wind turbines. Based on the analysis

this paper presents a coordinated prevention and control strategy to avoid outage of large scale wind power resulting from high voltage. The wind turbines which fulfill the high voltage ride through (HVRT) requirements would regulate the reactive power of power system according to the fluctuation of wind turbine terminal voltage. The reactive power compensation devices in wind farms would realize fast regulation and outage according to the fluctuation of system voltage and the outage saturation of wind turbines in wind farms. Finally

the coordinated prevention and control strategy is validated by simulation results. This work is supported by National Basic Research Program of China (973 Program) (No. 2012CB215105) and National Natural Science Foundation of China (No. 51261130484).