基于可变合闸角的变压器励磁涌流抑制方法  

Research on Inrush Current Suppression of Transformer Based on Changeable Closing Angle

作　　者：李海涛[1] 刘北阳 滕文涛 李宽 刘东超[1] 须雷[1] LI Haitao;LIU Beiyang;TENG Wentao;LI Kuan;LIU Dongchao;XU Lei(NR Electric Co.,Ltd.,Nanjing 211102,China;China Electric Power Research Institute,Beijing 100192,China;State Grid Shandong Electric Power Research Institute,Jinan 250003,China)

机构地区：[1]南京南瑞继保电气有限公司,江苏南京211102 [2]中国电力科学研究院有限公司,北京100192 [3]国网山东省电力公司电力科学研究院,山东济南250003

出　　处：《中国电力》2022年第9期70-78,共9页Electric Power

基　　金：国家电网有限公司科技项目(特高压变压器选相投切技术、控制装置及系统应用研究,SGSDDKOOWJJS1800100)。

摘　　要：变压器空载合闸励磁涌流可能引发电网安全问题,采用固定峰值选相合闸抑制励磁涌流的技术尚有提升空间。提出一种基于可变合闸角的励磁涌流抑制方法及控制策略,采用主变压器高压侧或低压侧的电压互感器测算剩磁,并根据剩磁情况调整目标合闸角,阐明了影响剩磁的关键因素及目标合闸角优选原则。试制了装置样机并通过动模仿真及开关带电试验验证了该方法的有效性,为工程实用化提供参考。The transformer no-load closing inrush current may cause safety problems in power grid,and the controlled switching technology with fixed target angle still has room for improvement in suppressing inrush current.A transformer inrush current suppression method and controlled-switching strategy are thus proposed based on changeable closing angle.The high voltage side PT or low voltage side PT of transformer is used to calculate the residual flux,and the target closing angle is adjusted according to residual flux.The key factors influencing the residual flux are determined,and the principles for choosing the target closing angle are proposed.A device prototype is developed and its effectiveness is verified through dynamic simulation and test station,which can provide reference for its engineering application.

关 键 词：变压器 励磁涌流 选相投切 控制策略 合闸电阻 剩磁 

分 类 号：TM40[电气工程—电器]