主变低压侧过流保护动作分析及改进方案探讨

牵引变电所安全稳定运行是铁路运输秩序高效、稳定的保证,设备故障时能快速恢复供电对保证运输秩序具有重要意义。通过对牵引变电所主变压器低压侧低电压启动过电流保护动作原因的归类分析,针对各类型故障发生的原因及现象等进行分析探讨,提出了相应的应急处置办法,并从相关保护设置及保护配置等方面对此类故障提出了改进与防范措施,对保障牵变压器过电流保护动作后的快速恢复供电具有一定的积极意义。

The safe and reliable operation of traction substation is the guarantee of an efficient and reliable order for railway transportation,it is of great significance to quickly recover the power supply in case of equipment failure to ensure the order of transportation.On the basis of the classification and analysis of the causes of low-voltage starting overcurrent protection action of the main transformer in the traction substation,the causes and phenomena of various types of faults are analyzed and discussed,corresponding emergency disposal measures are proposed,and improvement methods and preventive measures are proposed for such failures from relevant protection settings and protection configurations.They have a certain positive significance to ensure the fast recovery of power supply after the traction transformer overcurrent protection action.