横联线电流比法在双边全并联AT供电牵引网故障测距的应用研究  

Research on the Application of Cross-line Current Ratio for the Fault Location Method of Bilateral Cross-Coupling AT Feeding System

作　　者：李原 林国松[1] 张硕 韩正庆[1] LI Yuan;LIN Guosong;ZHANG Shuo;HAN Zhengqing(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 611756,China)

机构地区：[1]西南交通大学电气工程学院,四川成都611756

出　　处：《电工技术》2022年第18期121-125,共5页Electric Engineering

基　　金：四川省自然科学基金(编号2022NSFSC0405)。

摘　　要：当牵引网发生故障后,快速准确地判断故障类型并进行故障点位置的标定对电气化铁路的安全稳定运行至关重要。目前,横联线电流比故障测距法在我国高速电气化铁路得到了广泛应用。采用双边全并联AT供电方式,是我国高速铁路提高牵引网供电能力,向更高速度发展的一个选项。通过分析一种双边全并联AT供电牵引网发生各种类型短路故障时的电路模型,分析电压电流分布特征,得到横联线电流比与距离的关系特性,说明传统横联线电流比法在双边供电牵引网依然适用,并根据与既有单边供电牵引网应用的不同点,提出改进应用方法,最后基于MATLAB/Simulink平台的仿真分析,验证其合理性。It is particularly important to promptly locate the fault position and judge the fault type accurately after the fault occurs for ensuring the reliability to the electrified railway.At present,cross-line current ratio fault location method is widely applied on high-speed electrified railways in China.Bilateral cross-coupling autotransformer(AT)feeding system is an option for the higher power supply capacity to obtain a higher speed of high-speed railway in China.By analyzing the circuit model of a bilateral cross-coupling AT power supply network under short circuit fault,the characteristics of voltage and current distribution are analyzed and the relationship between distance and cross-line current ratio is obtained.It shows that the traditional cross-line current ratio method is appropriate for bilateral power supply mode.According to the application differentia of fault location method between under bilateral power supply networks and under unilateral power supply networks,the improved application method is put forward.The simulation based on MATLAB/Simulink verified the rationality of the method.

关 键 词：双边供电 横联线电流比 全并联AT供电方式 故障测距 

分 类 号：TM922[电气工程—电力电子与电力传动]