一起线路接地引起站用变烧毁的分析

Analysis of Station Transformer Burnout Caused by Line Grounding

针对中性点不接地系统所发生的一次配网两点接地故障,利用继电保护装置所配置的简易故障录波功能进行分析,还原了小电流接地系统所发生的线路接地而引起变电站内站用变烧毁故障的整个过程,提出了对中性点不接地系统加装小电阻接地的必要性与必要性。

Aiming at the two point grounding fault of the primary distribution network occurred in the neutral ungrounded system, the simple fault recording function configured by the relay protection device is used for analysis.The whole process of burning out fault of substation transformer caused by line grounding in small current grounding system is restored. The necessity of adding small resistance grounding to ungrounded neutral system is put forward.