微网技术具有诸多优点,但是微网中分布式电源的自身特性不平稳使微网及其运行控制困难,对微网的电能质量产生不利影响.在分析微网结构和特点的基础之上,通过与传统配电网电能质量问题的对比,对微网电能质量问题进行分析.对并联型有源滤波器(SAPF)模型进行改进,在检测环节用形态滤波器代替低通滤波器,并对形态滤波器的结构元素选择进行分析.在Matlab/Simulink软件平台上进行仿真分析仿真结果证改进的SAPF模型能满足微网对电能质量调节装置实时性的要求.%The mictugrid technologies have many outstanding advantages. However, the inherent characteristics of distributed generator (DGs), the special network topology and the operation performances of microgrids bring unfavorable impacts on mierogrid power quality. The structure and performances microgirids discussed. Based un the discussion, the microgrid power quality was analyzed and compared with traditional distribution grids. By replacing lowpass filter with mathematical morphological filter in detection unit, shunt active power filter (SAPF) model was improved. The selection of filter structure elements was also well analyzed. Simulation study was done with Matlab/ Simulink software. The simulation results prove that the improved SAPF model can meet the real-lime requirements of microgrids for power quality regulating devices.
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