并联有源电力滤波器电流预测控制

Current predictive control of shunt active power filter

采用预测控制对并联有源电力滤波器电流进行控制.根据预测控制的3个基本特征,即预测模型、滚动优化和反馈校正对有源电力滤波器(APF)的电流闭环进行设计,使电网中的谐波电流得到了很好的补偿.通过对并联有源电力滤波器的时域分析,得到了电流预测控制的内部模型结构,并根据预测控制理论对并联有源电力滤波器的电流控制环进行了研究和实现.电流预测控制采用实际输出与预测模型输出之间的误差进行反馈校正和滚动优化,克服了系统中存在的不确定性,提高了控制系统的精度和鲁棒性.仿真实验结果表明了该方法的正确性和可行性.

The application of predictive control to current closed loop control of shunt active power filter （SAPF） was discussed. Based on three characters of predictive control, they are predictive model, rolling optimization and feedback adjustment, current close-loop of SAPF is designed and the harmonic current in power system is availably compensated. Through the analysis of SAPF in time domain, the internal model of current predictive control is obtained and the current loop of SAPF is studied and realized. In predictive control, the error between the output of SAPF and predictive model is used to design feedback adjustment and rolling optimization controller. It cancels the uncertainty and improves the controlling precision and robustness of SAPF. The results of simulation show that the method is correct and feasible.