机车变流器直流及滤波电容器失效成因及其对策分析

Failure Causes of Dc and Filter Capacitors of Locomotive Converters and Countermeasures

交流传动技术是电气化铁路动车牵引中的重要技术,牵引变流器也逐渐成为交流传动系统中的重要核心部件。交流传动机车目前使用最多的一种变流器就是电压源型,电压源型的变流器需要大量的电容将整流和逆变两个重要的环节衔接在一起,但是容易在实际的运行中发生损害,针对这类问题,本文总结出发生电容器失效的原因,从而提出相应的改进措施。

AC drive technology is an important technology in the traction of electrified railways.Traction converters have gradually become an important core component in AC drive systems.One of the most widely used converters in AC drive locomotives is the voltage source type.The voltage prototype converter needs a large number of capacitors to connect the two important links of rectification and inverter,but it is easy to happen in actual operation.Damage,for this problem,it needs to be discussed intensively,and summarize the causes of capacitor failure,and propose corresponding improvement measures.