中文摘要：

农网负载和风速变化所引起的无功功率是目前制约风力发电系统用于农业供电的主要限制因素之一。为此,研究了电网负载与风速的变化对农用风力发电系统提供电能的有功功率、无功功率以及电网电压的影响;提出了一种固定电容器（FC）复合晶闸管控制电抗器（TCR）来实现风电系统的静态无功补偿（SVC）,对整个风电无功补偿结构进行建模与仿真。仿真结果表明,无论是风力还是负载突变,该方法均能实现无功功率的较好补偿,有效地解决了目前农用风电系统无功功率大的难题。

英文摘要：

Reactive power caused by the changes in load and wind speed is one of the major limiting factors in agricultural wind power generation system.This paper studied the active power,reactive power losses and grid voltage at different load and wind speed.We proposed a fixed capacitor（FC） composite thyristor controlled reactor（TCR） to control the static VAR compensation（SVC）,modeled and simulated the reactive power compensation structure.The results show the method can achieve better compensation of reactive power at different load and wind speed,which suitable for agricultural wind power systems.