Methods for transient AC overvoltage reduction at wind farm terminal

In the booming developing wind power market, wind converters are one of the key equipment for wind power integration in the power system. However, the overvoltage level that wind converters can withstand is relatively low compared with the conventional power generation system. Large amount of WTGs might trip due to overvoltage protection if the transient AC overvoltage in the system is too high. Therefore, it is important to limit the transient AC overvoltage in the system. This paper mainly presents four different methods for transient AC overvoltage reduction at wind farm terminal, which could reduce the trip risk of large amount of wind turbine generators (WTGs) and increase the operation stability of the power system integrated with wind power.