直流牵引网短路电流的计算  

Calculation of Short-circuit Current in DC Traction Network

作　　者：曹建设[1] 杲秀芳[1] 

机构地区：[1]铁道第一勘察设计院电气化处,西安助理工程师710043

出　　处：《城市轨道交通研究》2008年第2期31-34,共4页Urban Mass Transit

摘　　要：轨道交通直流牵引网短路电流的计算可为变电所设备的选择、继电保护设计、牵引变电所运行方式的确定等提供重要依据。给出了短路电流计算的数学模型,并利用可视化语言CVI完成了短路电流仿真计算;分析了整流机组外特性线性化对短路电流计算的影响。整流机组的外特性呈非线性特性,采用分段线性化的处理方法能够满足实际工程设计对计算精度的要求。The calculation of short-circuit current in DC traction network offers an important basis for the selection of electrical equipment, the design of protective-relay device and the decision for operation mode of traction substation. Mathematical model of short-circuit current calculation is given in this paper, and the calculation is finished by using visual CVI. The influence of the linearization of rectifier external characteristic on the short-circuit current calculation is specially analyzed, because the external characteristic of rectifier is non-linear, and the measures of subsection linearization can meet the required calculation precision on the actual engineering design.

关 键 词：轨道交通 直流牵引 短路电流 整流机组 

分 类 号：TM922[电气工程—电力电子与电力传动]