有源电力滤波器电流环无静差控制策略研究

本文对传统的电流环复合控制器的检测误差进行了理论分析,指出了检测负载侧电流的局限性,设计了基于传统PI控制和指定谐波指令相结合的电流控制器。该控制器基本上可以做到谐波指令的无静差跟踪,具有良好的补偿性能,克服了传统检测负载侧谐波电流时PI控制器的缺陷,而且具有传统检测负载侧谐波电流的灵活性。即使负载谐波电流高于有源电力滤波器的容量,该控制策略也能够总体上无静差输出,具有一定的理论意义和工程应用价值,理论分析和仿真验证了此种新型控制策略的正确性和有效性。

Research on Control Strategy of Current Loop and no Static Error in Active Power Filter

The paper analysis the the theoretical details about the detect error of the traditional current loop complex controller,and points the current limitation of the detection load side,this paper raises a current controller which bases on both the traditional PI controller and the specified harmonic instruction,this controller can basically track the harmonic instruction by the way of zero-static-error,with good compensation performance,this controller overcomes the defects of PI controller when detecting the load side harmonic current in traditional ways and is flexibility.Even if the harmonic current of the load go beyond the capacity of active power filter,it can output the current zero-static-error by using this strategy.This new control strategy has some theoretical significance and value in engineering,its correctness and effectiveness has already been verified by theoretical analysis and simulation.