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并联型有源电力滤波器(APF)是用于谐波治理的有效的电力电子设备,它通过检测负荷侧电流,发出与谐波电流大小相等且相位相反的补偿电流注入电网,以达到改善电网电能质量的目的。目前对如何有效设计有源滤波器与电网连接处的低通滤波器(LPF)的研究较少,文中提出利用巴特沃思低通滤波器原则来设计该LPF,并根据APF与电网不同的连接方式对LPF的参数进行适当的调整,仿真和实验结果都验证了这种方法的可行性。
Shunt Active Power Filter (APF) is an effective power electronic device for harmonic control. It detects the load current and injects a compensation current of equal magnitude and opposite phase to the harmonic current into the grid to improve the power grid The purpose of power quality. At present, there are few researches on how to effectively design a low-pass filter (LPF) between the active filter and the power grid. In this paper, we propose to design the LPF based on the Butterworth low-pass filter principle. According to the connection between the APF and the power grid LPF parameters of the appropriate ways to adjust the simulation and experimental results verify the feasibility of this method.