基于比例谐振控制的电网模拟系统设计

Application of Proportional Resonance Control in Power Grid Simulation System

为验证分布式发电并网相关技术,大多利用并网变流器对接可控变流器模拟电网相关状态。基于变流器形式下模拟电网故障的发生装置,针对传统的逆变侧变流器电压开环和闭环控制的问题,提出了将比例谐振控制器作为电压闭环的前馈环节的理论应用于发生电压不对称跌落的矢量控制系统中。仿真试验表明,所提控制策略可以很好地实现模拟不对称跌落故障,电流有较好的跟随性,系统动态响应速度快,对负载扰动有较强的抑制能力,稳态的控制精度较高,谐波含量较少。

This paper studied the reverse side converter control metliod, based on the dein the simulation grid in the converter form, thereinto,researches on the asymmetric drop fault mathematicalalgorithm and control strategy in depth. According to the traditional inverter side converter voltage open loop andclosed loop control problems,the paper put forward the feedforward link theory that takcontroller as the voltage loop to be applied to the vector control system in which happensThe simulation test shows that the control strategy based on proportional resonance can simulate the asymfault very well,the current has better following characteristics,makes the systemdynamic response speed quickly,it has a stronger inhibitory ability to load disturbance,the steady state control accuracy is content is less.