特殊工况下基于三角形计算的高精度输电线路单端测距方法

准确的故障测距是输电线路故障后快速恢复供电的重要前提.一般来说,线路上发生单相接地故障时,因 过渡电阻的影响,导致计算阻抗无法正确反映保护安装处至故障点的线路阻抗值,必须借助双端测距才可获得精 确测距值.文中在分析附加阻抗来源的基础上,提出在特殊的工况下,双端测距失效,基于三角形计算的单端测距 可精确测距,并且此方法可以推广至架空线、地缆混合参数的输电线路故障.经过仿真数据以及现场数据验证,该 方法具有较高的精度....

Full description

Saved in:
Bibliographic Details
Published in电力工程技术 Vol. 36; no. 2; pp. 110 - 115
Main Author 冯畅 李峰 宋爽 陆帅 王可
Format Journal Article
LanguageChinese
Published 2017
Subjects
T接线
单端测距
双端测距
混合参数输电线路
阻抗计算
Online AccessGet full text

Cover

More Information
Summary:准确的故障测距是输电线路故障后快速恢复供电的重要前提.一般来说,线路上发生单相接地故障时,因 过渡电阻的影响,导致计算阻抗无法正确反映保护安装处至故障点的线路阻抗值,必须借助双端测距才可获得精 确测距值.文中在分析附加阻抗来源的基础上,提出在特殊的工况下,双端测距失效,基于三角形计算的单端测距 可精确测距,并且此方法可以推广至架空线、地缆混合参数的输电线路故障.经过仿真数据以及现场数据验证,该 方法具有较高的精度.
Bibliography:32-1866/TM
FENC Chang1,LI Feng1,SONC Shuang2,LU Shuai1,WANC Ke1 （1.Nanjing PANENC Technology Development Co. L td .,Nanjing 210031,China;2.State Crid Jiangsu Electric Power Company Research Institute,Nanjing 211103,China）
single-ended fault location; double-ended fault location; impedance calculation; hybrid parameter transmission line; T type connection
Precise fault location is an important precondition of quick power supply restoration after transmission line fault occurs. In generally,concerning one-phase to ground fault,it is the transient resistance that causes that the impedance from where the relay is installed to where the fault occurs is caculated incorrectly. On such scenario,a double-ended fault location algorithm is preferred in order to acquire rather precise fault location result. Based on analyzing the source of additive impedance, this essay presents that under some special working conditions whereas double-ended fault location becomes invalid, single-ended fault calculation based on solving tri
ISSN:2096-3203