动车组交流辅助供电系统接地故障检测方法研究

Research on Method for Grounding Fault Detection of AC Auxiliary Power Supply System for Multiple Units

以CRH3型动车组交流辅助供电系统为例,分析了动车组三相三线交流辅助供电系统接地故障的检测方法,构建了检测方法的数学分析模型,并推导出检测方法相关的计算公式,给出了CRH3型动车组交流辅助供电系统接地故障检测判据。通过Matlab仿真和试验共同验证了检测方法的正确性,为动车组交流辅助供电系统接地故障检测提供了指导。

Taking AC auxiliary power supply system for type CRH3 multiple as example,the detection method of grounding fault of three-phase three-wire AC auxiliary power supply system for multiple units is analyzed,the mathematical analysis model of detection method is constructed and calculation formulas related to detection method are derived,the criteria of grounding fault detection of AC auxiliary power supply system for CRH3 multiple units are provided.Via Matlab simulation and test,the correctness of detection method is verified,which provides guidance for grounding fault detection of AC auxiliary power supply system for multiple units.