地铁供电系统直流侧短路暂态过程分析  

Analysis of Close-up and Remote Short Circuit Transient of DC Supplied Railways

作　　者：廖永衡[1] 冯晓云[1] 张峻领[1] 黄丹丹[1] 

机构地区：[1]西南交通大学,四川成都610031

出　　处：《电力电子技术》2009年第12期28-30,共3页Power Electronics

摘　　要：24脉波整流系统因具有很强的削弱网侧谐波电流的功能,已广泛应用到城市轨道交通电网建设中。精确计算出该牵引整流系统的直流侧短路电流对设计短路时保护器件和相关电力设备是非常重要的。牵引整流系统直流侧短路可分为整流所直流侧近端短路和牵引网远端短路。通过分析分别建立了近端短路暂态和稳态计算模型以及远端短路暂态计算模型,并通过Matlab对该模型进行了仿真,其结果表明了该模型的正确性。Electrical supply substations（ESS）in modern railway DC systems are widely equipped with 24-pulse rectifiers,because such a converter provides a good promise between DC-side voltage ripple and AC-side current harmonic content.Accurate determination of transient DC-side short-circuit current is important for design of protection devices and power equipment.The general method to calculate the short-circuit current is obtained by combining both the impedance calculation and short-circuit current formula in short-circuit state which is verified by the simulation with Matlab.The result shows the method is correct.

关 键 词：整流器 地铁直流供电系统 短路电流 

分 类 号：TM461[电气工程—电器]