一台干式配电变压器线圈匝间短路事故分析

摘要

Introduction was made to a dry-type distribution transformer short-circuit fault. This paper used the relevant circuit principle and limitation etc mathematical methods to carry out theoretical analysis for several kinds of possibilities of resistance variation under single phase coil faults state. The measured data of accident transformer were combined with theoretical analysis to carry out verification and to qualitativly judge the transformer accident state. This method of case analysis could provide technology and case references for the similar accidents.%介绍了一台干式变压器短路事故，运用相关电路原理和极限等数学方法对单相线圈事故状态下电阻变化的几种可能性进行了理论分析，并将事故变压器测量数据和理论分析相结合进行验证，进而对变压器事故状况进行了定性评判，该案例分析方法亦可为同类事故的分析提供技术和案例参考。