信号注入法在油田电网对地电容电流测试中的应用  

Application of Signal Injection Method in Measuring Capacitive Grounding Current of Oilfield Power Grid

作　　者：王勇焕 李林卿 杨靖 WANG Yonghuan;LI Linqing;YANG Jing(Hydropower Plant of Henan Petroleum Exploration Bureau Co.,Ltd.,Sinopec Group,Nanyang 473132,China)

机构地区：[1]中国石化集团河南石油勘探局有限公司水电厂

出　　处：《电工技术》2019年第23期136-137,140,共3页Electric Engineering

摘　　要：介绍一种从电网一次侧中性点注入特定频率信号的单相对地电容电流测量方法,并应用在河南油田电网各变电站6~35 kV系统单相对地电容电流测量中,确定了各变电站消弧线圈补偿运行方案,使消弧线圈能合理补偿系统电容电流,且减少了系统内单相接地发展为两条或多条线路同时跳闸的概率。A single-phase capacitive current measurement method which injected specific frequency signal from the neutral point of the primary side of the power grid was introduced.It was applied to the single-phase capacitive current measurement of 6~35 kV substations in Henan Oilfield Power Grid.The compensation operation scheme of the arc suppression coils in each substation was determined,so that the arc suppression coils could reasonably compensate the capacitive current of the system.Current reduced the probability of single-phase grounding developing into two or more lines tripping at the same time.

关 键 词：电容电流 信号注入法 消弧线圈 合理补偿 

分 类 号：TM755[电气工程—电力系统及自动化]