±800 kV陕武特高压直流输电系统直流电流测量故障分析  

Analysis on±800 kV Shan-Wu UHVDC System DC Current Measurement Fault

作　　者：刘云舒 郑昆 万泉 黄元 LIU Yunshu;ZHENG Kun;WAN Quan;HUANG Yuan(State Grid Hubei DC Company,Yichang 443001,China)

机构地区：[1]国网湖北省电力有限公司直流公司,湖北宜昌443001

出　　处：《通信电源技术》2022年第13期186-188,共3页Telecom Power Technology

摘　　要：通过分析±800 kV陕武特高压直流输电(Ultra-High Voltage Direct Current,UHVDC)工程调试期间产生的直流电流测量故障,认为在满足一些特定工况下,当极母线和公共母线区域回路形成环流,高、低端阀组侧IVY、IVD最大电流较小,而直流中性母线电流IDNC较大的情况下可能导致直流测量故障报警产生。分析得知此种情况并非真正的直流测量故障,对特高压直流换流站运维具有一定指导意义。Through the analysis±of the DC current measurement fault generated during the commissioning of the 800 kV Shaanxi Ultra-High Voltage Direct Current(UHVDC)transmission project,it is believed that under some specific working conditions,when the loop of the pole bus and the common bus area form a circulation,the maximum current of the high and low-end valve group side IVY and IVD is small,and the DC neutral bus current is larger,which may lead to a DC measurement fault alarm.The notification analysis learned that this situation is not a true DC measurement fault,which has certain guiding significance for the operation and maintenance of UHVDC converter stations.

关 键 词：特高压直流输电(UHVDC) 测量故障 电压源换流器(VSC) 直流中性母线电 

分 类 号：TM721.1[电气工程—电力系统及自动化]