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微电网概念的提出虽然有效地弥补了大电网的诸多不足,提高了电网的可靠性,但是由于分布式能源、负荷以及储能装置接入微电网大都通过电力电子设备,再加上接入系统的背景谐波,这无疑会为微电网带来一定的谐波污染。提出利用有源电力滤波器(APF)消除谐波的方法。首先分析APF的拓扑结构,提出快速准确的电流检测方法和有效的直流侧电压以及交流侧电流的控制方法。并利用Matlab/Simulink软件对该微电网有源滤波器控制系统进行仿真以验证其滤波能力。
Although the concept of microgrid has effectively made up for many deficiencies of large power grids and improved the reliability of power grids, most of the access to microgrids by distributed energy sources, loads and energy storage devices is through power electronic devices, together with access systems Background harmonics, which will undoubtedly bring some harmonic pollution to the microgrid. A method to eliminate harmonics by using active power filter (APF) is proposed. First of all, the topology of APF is analyzed and a fast and accurate current detection method and an effective control method of DC voltage and AC current are proposed. The simulation of the active power filter control system using Matlab / Simulink software to verify its filtering capability.