浙江电力2025，Vol.44Issue(2)：103-109,7.DOI:10.19585/j.zjdl.202502010
变压器分闸对铁心剩磁的影响研究
Research on the impact of transformer switching-off on core residual magnetism
摘要
Abstract
Magnetizing inrush current caused by transformer no-load switching can lead to various issues in power grid operations.Techniques such as phase-controlled switching are effective in mitigating these effects,with the key factor being the measurement of the transformer core's residual magnetism.This paper investigates the impact of transformer switching-off on core residual magnetism.First,based on the transformer switching-off circuit,the switching-off interruption overvoltage is estimated,and its qualitative impact on core residual magnetism is ana-lyzed.Next,using J-A hysteresis simulation,the relationship between transformer core residual magnetism and switching-off angle,as well as the magnetic flux trajectory after switching-off,is explored.Finally,quantitative mea-surement of the transformer's residual magnetism is conducted,revealing the evolution patterns of actual residual magnetism.The theoretical analysis and simulation-based findings are validated.关键词
变压器励磁涌流/剩磁/截流过电压/励磁涌流抑制/空载合闸Key words
transformer magnetizing inrush current/residual magnetism/chopping overvoltage/magnetizing inrush current suppression/no-load closing引用本文复制引用
韩霄,陈浩天,周佳,陈卫,陈德树..变压器分闸对铁心剩磁的影响研究[J].浙江电力,2025,44(2):103-109,7.基金项目
南方电网公司科技项目(031900KC23070040) （031900KC23070040）
