动态电压恢复器复合控制策略研究*

摘要

Dynamic Voltage Restorer(DVR) is a practicable and economical way to ensure the energy quality of power system .Under the study of the control strategy that combine grid voltage feed‐forward control with the load voltage and ca‐pacitor current double closed‐loop feedback control ,sliding mode variable structure control in feedback control is analyzed . Although this control strategy has excellent dynamic performance as well as good anti‐jamming capability ,it has large static error .A novel control strategy based on sliding mode variable structure control combined with repetitive control is proposed . The simulation and test results show that the proposed strategy makes up the shortfall of fuzzy sliding mode variable struc‐ture control .%动态电压恢复器（DVR）是保障电力系统电能质量经济有效的可行方案。论文在研究动态电压恢复器的电网电压前馈控制加负载电压与电容电流双闭环反馈控制相结合的复合控制策略的基础上，分析了反馈环节中基于滑模变结构的控制方法，虽然该方法使DVR有良好的动态性能以及负载适应性能，但稳态误差较大。考虑到重复控制的良好稳态性能，本文提出一种将滑模变结构与重复控制相结合的控制方法，仿真及实验结果表明该方法稳态误差小，有效地弥补了滑模变结构控制的不足。