摘要
雷电入侵波是造成变电站设备损毁的重要原因之一,针对入侵波作用下电力变压器的过电压特征进行分析,对于保障变压器的运行安全具有重要的工程意义。本文基于电磁暂态程序EMTP/ATP建立了雷电入侵波与变压器集中参数等值电路模型,重点分析了绕组轴向变形与径向变形对绕组最大电压分布的影响。结果表明,高压绕组前段轴(径)向变形会增加(减小)变形侧高压绕组的最大电压,减小(增加)非变形侧绕组的最大电压;中压绕组径向变形会减小中压绕组变形位置与高压绕组正对位置的最大电压。
The lighting invasion wave is one of the main factors that damage the substation equipment.As a result,the analysis of overvoltage characteristics of transformers under the lighting invasion wave is of great engineering significance for ensuring the operation safety of transformers.In this paper,the lightning invasion wave and the distributed parameter equivalent circuit of a transformer are calculated based on the electro-magnetic transient program/alternative transients program(EMTP/ATP),and the effects of axial and radial deformations of windings on the maximum voltage distribution in windings are analyzed in detail.Results show that in the case of deformation in the front section of the high-voltage winding,the maximum voltage on the deformed side of high-voltage winding will be increased(decreased)by the axial(radial)deformation,while that on the undeformed side will be decreased(increased)by the axial(radial)deformation.In the case of radial deformation in the medium-voltage winding,the maximum voltage at both the deformation position of medium-voltage winding and the opposite position of high-voltage winding will be reduced.
作者
刘晓航
高宇
薛锋
贺天任
LIU Xiaohang;GAO Yu;XUE Feng;HE Tianren(State Grid Tieling Power Supply Company,Tieling 112000,China;School of Electrical and Information Engineering,Tianjin University,Tianjin 300072,China;TBEA Shenyang Transformer Group Co.,Ltd,Shenyang 110144,China;Shenzhen Power Supply Bureau Co.,Ltd,Shenzhen 518000,China)
出处
《电力系统及其自动化学报》
CSCD
北大核心
2023年第3期86-93,共8页
Proceedings of the CSU-EPSA
关键词
电力变压器
绕组变形
雷电入侵波
最大电压分布
power transformer
winding deformation
lightning invasion wave
maximum voltage distribution
作者简介
刘晓航(1994-),男,硕士研究生,研究方向为高电压与绝缘技术。Email:liuxiaohang1230@163.com;高宇(1981-),男,博士,副教授,研究方向为高电压与绝缘技术。Email:hmgaoyu@tju.edu.cn;薛锋(1979-),男,硕士研究生,研究方向为电机与电器。Email:474653920@qq.com。
