基于有效频带内暂态电流差值的配电网故障选线  

Fault Line Selection of Distribution Network Based on the Difference of Transient Current in Effective Frequency Band

作　　者：钟健 姚康 董泽康 ZHONG Jian;YAO Kang;DONG Zekang(Yunnan Power Grid Co.,Ltd.,Linyi Power Supply Bureau,Lincang 677000,China)

机构地区：[1]云南电网有限责任公司临沧供电局,云南临沧677000

出　　处：《电工技术》2021年第5期66-68,共3页Electric Engineering

摘　　要：配电网发生故障时,单相接地故障发生的概率占70%以上,而故障选线法易受弧光接地、运行方式等因素的影响。在研究故障后暂态电流分量特征的基础上,对有效特征频带的选取进行分析,并根据有效特征频带内的暂态电流差值进行故障选线,提高了配电网故障选线精度。When the distribution network fails,the probability of single-phase grounding faults accounts for more than 70%,and the fault line selection method is susceptible to factors such as arc grounding and operation mode.On the basis of studying the characteristics of transient current components after faults,the selection of effective characteristic frequency bands is analyzed.The fault line selection is performed based on the difference of transient currents in the effective characteristic frequency band,which improves the accuracy of fault line selection in the distribution network.

关 键 词：暂态量特征 有效特征频带 暂态电流差值 故障选线 

分 类 号：TM711[电气工程—电力系统及自动化]