风电场集电线路故障跳闸分析  

Analysis of Fault Trip of Collector Line in Wind Farm

作　　者：刘旭隆 孟秀丽 张寅 孙兴伟 孙晓明 LIU Xulong;MENG Xiuli;ZHANG Yin;SUN Xingwei;SUN Xiaoming(Beijing Branch of Beijing Jingneng Clean Energy Power Co.,Ltd.,Beijing 100000,China)

机构地区：[1]北京京能清洁能源电力股份有限公司北京分公司,北京100000

出　　处：《电工技术》2021年第21期184-186,共3页Electric Engineering

摘　　要：传统的故障测距为阻抗法故障测距,此类方法求取故障距离时要求单位阻抗分布均匀,且故障不为高阻故障,但当线路发生高阻故障时,受过渡阻抗影响,在一定程度上对故障测距的精度有较大影响。由于风电场集电线路大部分为电缆架空混架,且存在较多的T接风机,因此阻抗法故障测距在风电场中定位精度较低。基于行波法测距原理介绍了一起风电场集电线路故障跳闸案例,阐述了风电场故障时故障判定情况和精确定位情况,与阻抗法故障测距进行对比,体现了行波法测距的高精度。The traditional fault location method is the impedance method fault location method.This type of method requires the unit impedance distribution to be uniform when calculating the fault distance,and the fault is not a high-impedance fault.However,when a high-impedance fault occurs on the line,it is affected by the transition impedance,which has a greater impact on the accuracy of fault location to a certain extent.Since most of the collection lines of wind farms are overhead cables,and there are more T-connected wind turbines,the impedance method fault location method has low positioning accuracy in wind farms.A case of fault trip of collecting line in wind farm is introduced.Based on the traveling wave fault location system,the fault determination and precise location of wind farm faults are explained.Compared with the impedance method,the traveling wave method shows the high accuracy of fault location.

关 键 词：行波法测距 风电场故障测距 故障判定 精确定位 

分 类 号：TM614[电气工程—电力系统及自动化]