Survey on approaches to smooth output of shuntconnected wind farm

YU Huaran1,2, JIANG Weiyi1, QIU Sheng1

(1 Jiangsu Suzhou Power Supply Company, Suzhou 215004, China;
2College of Electrical Engineering， Zhejiang University, Hangzhou 310027, China)

Abstract: Wind power has been the hot spot in the development of power systems, because it has  following advantages: clean, kind to the environment, techniquematured and so on In order to utilize the wind power effectively, the large wind farms must be connected with the power system But the output of wind farm is fluctuant and random, so it can do harm to the stability and power quality of the power system, which becomes a bottleneck of developing the wind power quickly Aiming at the impacts on the power system brought by the fluctuation of wind power output, the effects on power system of shuntconnected wind farm were analyzed The existing control methods of smoothing the wind power output were summarized and the future research was pointed out The result indicates that installing reactive power compensation devices or adopting energy storage devices in wind farms or making up microgrid with other distributed generations are effective approaches to smooth the output of wind farm and reduce the impacts on power system integration

Key words: shuntconnected wind farm; smooth output of wind farms; reactive power compensation; energy storage; microgrid