基于电流特征的高速铁路供电臂联跳保护方案

发布时间：2018-07-16 17:57

【摘要】：针对高速铁路牵引网所采用的全并联AT供电方式,提出一种基于电流特征的高速铁路供电臂联跳保护方案。从理论上推导不同区段故障时的全并联AT牵引网短路电流表达式,分析并联接线对电流分配的影响。当变电所与AT所之间故障时,变电所的电流比和AT所功率方向可以反映故障线路;当AT所与分区所之间故障时,功率方向可以反映故障线路。在变电所配置电流比和过电流保护,AT所和分区所配置方向过电流保护,利用联跳信号将整个供电臂保护构成一个整体,实现了故障的快速隔离。通过Matlab/Simulink对各种故障类型和故障位置的仿真,验证了该方案的选择性和快速性。理论分析和仿真结果表明,该保护方案实现简单,不同保护之间无需同步,能够快速隔离故障供电臂。
[Abstract]:Aiming at the all-parallel AT power supply mode used in high-speed railway traction network, this paper presents a scheme of high-speed railway power supply joint jump protection based on current characteristics. The expression of short-circuit current of all-parallel AT traction network in different fault sections is deduced theoretically, and the influence of parallel connection on current distribution is analyzed. The current ratio and the power direction of the substation can reflect the fault line when the fault between the substation and the AT station, and the power direction can reflect the fault line when the fault occurs between the AT station and the substation. In the substation, current ratio and over-current protection are arranged in the AT station and in the area. The whole power supply arm protection is formed into a whole by using the joint jump signal, which realizes the fast isolation of the fault. The simulation of various fault types and fault locations by Matlab / Simulink verifies the selectivity and rapidity of the scheme. Theoretical analysis and simulation results show that the protection scheme is simple and can isolate the fault power supply arm quickly.
【作者单位】：西南交通大学电气工程学院;
【基金】：国家自然科学基金重点项目(U1134205) 中央高校基本业务费专项(SWJTUBR037) 铁道部重点项目(2011J023-C)~~
【分类号】：TM773

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