To improve the power quality of distribution system in urban rail transit, this article analyzes the power quality of distribution system in urban rail transit, compares the filtering and reactive power compensation schemes, and proposes a reasonable power quality control scheme. By means of measurement, statistics and analysis on the application situation of the device which had been developed to improve the power quality, the article draws a conclusion that the active filtering and dynamic reactive power compensation devices can improve the power quality obviously and can have the effects of energy-saving.%为了改善城市轨道交通配电系统电能质量,对轨道交通的配电系统电能质量进行分析,并对滤波及无功补偿方案进行比较,提出合理的电能质量治理方案.对电能质量改善装置投入使用后的情况进行测量、统计和分析,得出在城市轨道交通配电系统中使用有源滤波及动态无功补偿装置能够显著改善电能质量,并起到节能效果的结论.
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