Microgrid is an effective way to use renewable energy,and to study the power quality of microgrid has great practical significance. Based on the analysis of the characteristics of the common pow-er quality problems in microgrid, the related indexes for evaluating the power quality of microgrid are put forward. The threshold value of different power quality indexes is determined according to the existing power grid quality related countries,distributed power grid and public power grid standards,and a detailed calculation method is proposed. The classification describes the existing improvement methods and control strategies for the power quality problems of microgrid. According to the trend of distribution network be-coming more and more intelligent,the power quality control method of microgrid is prospected.%微电网是利用可再生能源的有效方式,研究微电网电能质量问题具有重大的现实意义.基于对微电网中常见电能质量问题特点分析,该文提出了评估微电网电能质量的相关指标.根据现有涉及微电网电能质量的国家、分布式电源并网及公用电网标准等,确定微电网中不同电能质量指标的阈值,并提出详细计算方法.分类描述了已有对微电网产生的电能质量问题提出的改善方法和控制策略.根据未来电网将与能源和信息相结合形成综合能源网络的发展趋势,对微电网电能质量的治理方法进行展望.
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