统一电能质量控制器的研究

Study on Unified Power Quality Controller

讨论了一种统一电能质量控制器的拓扑结构,介绍了它的工作原理、补偿指令的产生方法和控制策略。其中串联有源电力滤波器被控制为电压源,并联有源电力滤波器被控制为电流源,使得负载电压为正弦电压,电网输入电流为正弦电流。在理论分析的基础上,应用MATLAB6.5软件对三相三线系统进行了仿真研究,结果表明统一电能质量控制器可有效地补偿电网侧和负载侧产生的多种电能质量问题。

A kind of topology of Unified Power Quality Controller （UPQC） is presented. The working principles, the algorithm of compensation reference generation and the control method are discussed. In the control scheme, the series APF is controlled as a voltage source and makes the load voltage sinusoidal, while the shunt APE is controlled as a current source and keeps the input line current in the normal value. Based on the theoretical analysis, simulation with MATLAB6.5 has been carried out in three-phase system, and the results show that the UPQC can effectively compensate multiple different power quality interference originated either from the load or from the line side.