The Research Of Power System Flow Characters With Wind Farm

This paper sets a view to the mutual influence between wind generators and power system,and does some research on the problems brought by large grid-connected wind farm.First,it analyzes the math mode of wind power which can be used to research the power stable character.The mode considers wind generator shaft.Then, the paper the three power flow algorithm which be used to calculate power flow of power system with wind farm.It uses the combine method and I/PSS to research the system power flow which contains Variable-speed Constant-frequency Wind Generator,Doubly-fed Induction Generator.The result shows Variable-speed Constant-frequency Wind Generator has a good benefit to improve the power system stable character.At last,it analyzes the important influence factors of Maximum Power Injection.Then,it brings up some methods to improve the stable character of power grid which contains the choice of Variable-speed Constant-frequency Wind Generator,the injection of high voltage and enhancing power reserve capacity.