基于静止无功补偿器的风电场高电压穿越研究

摘要

随着风电场装机增多,电网要求其具有高电压穿越能力,即风电机组在规定电压幅值和时间内不能脱网运行.针对这个问题,设计了一种基于静止同步无功补偿器的提高风电场高电压穿越能力的控制方案,实施在静止同步无功补偿器上,当电网电压骤升时,控制静止同步无功补偿器向电网提供容性无功,使电网电压升速及持续时间下降,从而实现了高电压穿越.最后,基于仿真软件对新型高电压穿越方案进行了仿真验证.%With the increase of wind farms,the ability of the high voltage ride through is requested. When wind turbine joins the high voltage ride through,it should not to be disconnected from the grid with specifically voltage amplitude and time. Aiming at it,a new control scheme based on static synchronous compensator was proposed to improve the high voltage ride through capability of the wind farm. The new control method was used for the static synchronous compensator,when the grid voltage swelled,static synchronous compensator provided capacitive reactive power to the grid by the controller. So,the grid voltage raising speed and duration were decreased,then the high voltage ride through capability was realized. At last,the new high voltage ride through scheme based on the static synchronous compensator has been verified with simulations.