Analysis of Transformer Interturn Short Circuit Fault Caused by Near Zone Short Circuit and Comprehensive Diagnostic Test
Power transformer is an important hub equipment of power system,and short-circuit impact in the near ar-ea will cause serious deformation of the transformer body.So,it is of great significance to diagnose the damage of the transformer after short-circuit impact and determine the maintenance strategy.This paper introduces a 220 kV transform-er tripping event caused by short circuit impact in the near area of the middle voltage side.In the process of field diagnos-tic test,the fault indication of different test data is different,and the fault location and cause of transformer fault cannot be reasonably explained through a single test.Based on the analysis of fault recording files and comprehensive diagnostic test data,the fault mechanism of electrical and magnetic circuit of transformer is comprehensively analyzed,and the fault location is determined.The subsequent on-site disintegration confirms the validity of the comprehensive diagnostic analy-sis method.
short circuit impacttransformerinterturn short circuitdiagnostic testwinding deformation
NETL
NSTL
万方数据
