摘要
针对具有特殊结构的全并联AT牵引网在实施有效可靠的单端故障行波测距时存在的问题,根据AT牵引网的线路特点,对其上下行线路进行相模变换解耦,将行波分解为同向模量和反向模量,并结合AT自耦变压器的电磁暂态模型,推导行波同向模量在AT并联连接处的波过程时域表达式,仿真验证解析解的正确性,揭示初始波到浪涌波尾的衰减形状与自耦变压器漏阻抗的关系;分析行波各模量的传播特点,得到反向模量只在故障发生区段内折反射的结论。在此基础上,提出利用反向模量只存在于故障区段内及同向模量通过AT后波尾衰减加剧的现象判定故障区段的方法,对不同区段提出行之有效的单端行波故障测距算法。
Aiming at the problems existing in the implementation of effective and reliable traveling wave fault location for all-parallel AT traction network with special structure,the bidirectional lines were decoupled by phase-mode transformation to decompose the traveling wave into the same direction modulus and reverse modulus according to the characteristics of AT traction network.Combined with the electromagnetic transient model of the AT autotransformer,the time domain expression of the wave process of the traveling wave in the same direction modulus at the parallel connection was derived,and the correctness of the analytical solution was verified by simulation.The relationship between the attenuation shape of the wave tail and the leakage impedance of the autotransformer was revealed.Upon the analysis of the propagation characteristics of each modulus of traveling wave,the conclusion that the reverse modulus was only reflected in the fault area was obtained.Then,a method was proposed to determine the fault zone by using the phenomenon that the reverse modulus only existed in the fault zone and the wave tail attenuation of the same direction modulus increased after passing through the transformer,and an effective single terminal traveling wave fault location algorithm was proposed for different zones.
作者
傅钦翠
陈剑云
钟汉华
周欢
华敏
FU Qincui;CHEN Jianyun;ZHONG Hanhua;ZHOU Huan;HUA Min(State Key Laboratory of Performance and Guarantee of Rail Transportation Infrastructure,East China Jiaotong University,Nanchang 330013,China)
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2021年第7期66-76,共11页
Journal of the China Railway Society
基金
国家自然科学基金(51467004)。
关键词
全并联AT牵引网
行波故障测距
同向模量
反向模量
自耦变压器
all-parallel AT traction network
traveling wave fault location
same direction modulus
reverse modulus
auto transformer
