Analysis of Station Transformer Burnout Caused by Line Grounding

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.