基于非接触式行波采集的分布式高压直流故障测距方法
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引用本文:张怿宁1,孟令军2,王越杨1.基于非接触式行波采集的分布式高压直流故障测距方法[J].电网与清洁能源,2020,36(4):55~59
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作者单位
张怿宁1 1. 中国南方电网超高压输电公司 检修试验中心 
孟令军2 2. 山东山大电力技术股份有限公司 
王越杨1 1. 中国南方电网超高压输电公司 检修试验中心 
基金项目:南方电网公司重点科技项目(CGYKJXM20160001)
中文摘要:为提高高压直流输电线路故障测距的精度和供电可靠性,提出一种基于非接触式行波采集的分布式高压直流高阻故障测距方法。该方法采用分布式安装方式,基于空间电压、电流行波电磁场的宽频带检测技术,采用宽频带电磁场传感器实现对暂态行波信号的无失真采集;研究了动态自适应波速算法,利用行波采集终端分布式安装的特点,通过在线测量不同线路区段的实时故障波速,对故障段的行波波速进行矫正计算,避免了波速误差对测距结果的影响,有效提高了测距精度。分布式行波采集终端不需要安装在输电线路上,避免了设备安装和维护导致的停电。仿真及现场试验验证了方法的有效性和实用价值。
中文关键词:非接触式行波采集  分布式  高压直流输电  故障测距
 
A Fault Location Method for Distributed HVDC High Resistance Fault Based on Non-Contact Traveling Wave Collecting
Abstract:This paper presents a distributed fault location method for HVDC high resistance faults based on non-contact traveling wave collecting. This method adopts the distributed installation method, based on the wide band detection technology of the electromagnetic field of spatial voltage and current traveling wave, and adopts the wide band electromagnetic field sensor to realize the distortion-free collection of the transient traveling wave signal. The algorithm of dynamic self-adapting wave speed studied in the paper uses the characteristic of distributed installation the traveling wave collecting terminal, and corrects the traveling wave speed by on-line measuring the real time fault wave speed in different segments of the line to avoid the impacts of the wave speed error on the fault location result and thus to improve the location accuracy effectively. The distributed traveling wave collecting terminal does not need to be installed on the transmission line, which can avoid power failure caused by equipment installation and maintenance. At last, the effectiveness and practical value of the method have been proved by the simulation and field test.
keywords:non-contact traveling wave collecting  distributed  HVDC transmission  fault location
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