摘要
以一起220 k V主变压器保护装置发电压互感器(TV)异常告警为例,说明三次谐波超标是引起装置TV异常的原因之一。经过进一步分析得出,当TV中性点装有消谐器时,消谐器会产生电压并在TV零序开口三角上显现出三次谐波,进而引起主变压器保护装置发TV异常告警。针对该类异常告警提出了解决对策,以确保变电站内主设备安全稳定运行。
Taking an abnormal alarm of TV for a 220 kV main transformer protection as an example,it is found that excessive third harmonic is a cause for abnomal TV.Furthermore,when a harmonic elimination is equipped at the TV neutral point,it can produce voltage and third harmonics in the zero sequence open-delta connection,causing abnormal alarm of TV for main transformer protection.Corresponding methods are put forward to ensure the safe and stable operation of the main equipment of substation.
作者
张巍
周国鹏
汪洋
倪浩
钟著辉
ZHANG Wei;ZHOU Guopeng;WANG Yang;NI Hao;ZHONG Zhuhui(School of Electrical and Information Engineering,Hubei University of Science and Technology,Xianning 437000,China;Institute of Engineering Technology,Hubei University of Science and Technology,Xianning 437000,China;State Grid Changde Power Supply Company,Changde 415000,China)
出处
《华电技术》
CAS
2019年第6期23-26,37,共5页
HUADIAN TECHNOLOGY
基金
湖北省科技计划项目(2018ABA076)
湖北科技学院校级考研项目(2017-XB-043)
关键词
TV异常告警
主变压器保护
三次谐波
二次电压异常
消谐器
abnormal alarm of TV
protection of main transformer
third harmonics
secondary voltage
harmonic elimination
