带有虚拟磁链估算补偿的STATCOM定频直接功率控制

Direct Power Control with Constant Switching Frequency for STATCOM with Compensation in Virtual Flux Estimation

将基于虚拟磁链定频直接功率控制策略应用于STATCOM,解决传统直接功率控制开关频率不固定,滤波器设计困难,抽样频率和A/D转换要求高的问题,重点对传统虚拟磁链估算中由低通滤波器(LPF)代替纯积分环节时产生的幅值和相位误差进行了分析,并对此提出了一种补偿方法。对比仿真结果表明,该补偿方法很好地消除了传统方法存在的误差。理论分析与仿真结果表明,带有虚拟磁链估算补偿的STATCOM定频直接功率控制系统实现了无功功率的快速检测和补偿,具有良好的动静态性能。

The direct power control with constant switching frequency based on virtual flux is applied in STATCOM to solve the problems existing in traditional direct power control: unfixed switching frequency,difficult design of filters,high frequency of sampling and A/D,etc.This paper puts an emphasis on analyzing amplitude and phase errors caused by replacing integrator with LPF in traditional estimation of virtual flux and proposing a method of compensation.The results of comparative simulations show that this met...