高速动车组高压箱内异常放电故障分析及解决方案

Analysis of Abnormal Discharge Fault in High-voltage Electric Box and Solutions

介绍了高速动车组高压箱内异常放电故障的基本情况,介绍了高压箱主电路原理及故障检测原理。通过检查测试及仿真分析,找出了高压箱设计中的薄弱点,并针对性提出了改进方案,对电气间隙的薄弱点进行了优化提升,增加了箱内绝缘安全裕度。试验验证表明,改进方案满足设计要求。同时提出了高压箱设计绝缘配合的注意事项。

With an analysis of the basic situation of abnormal discharge fault happened in high-speed EMU high voltage box,the principles of the main circuit in high voltage box and the fault detection are introduced.Through test and simulation analysis,the weak points in the design of high voltage box are detected,corresponding improvement solutions are proposed,including the optimization and improvement of weak points in electrical clearance,the increase of the insulation safety margin in the box.The experiment result shows that the the optimization and improvement scheme could meet the design requirements,precautions for insulation coordination in the design of high voltage box are proposed at the same time.