城市轨道交通直流牵引网稳态短路电流计算

Calculation of Steady State Short Circuit Current of DC Traction Network of Urban Mass Transit

基于建立的整流机组外特性模型及牵引变电所、牵引网数学模型,利用电路图法求解单边供电和双边供电直流短路电路中的各个参数,推导直流侧牵引网单边供电和双边供电短路稳态模型中各牵引变电所供给的短路电流及短路点短路电流的表达式,并通过实例分析对直流牵引网稳态短路电流进行计算。

The various parameters of DC short circuit of unilateral and bilateral power supply have been calculated, and expression formulae for short circuit current and short circuit current at all short circuit points in short circuit steady state model for DC traction network unilateral power supply and bilateral power supply are derived respectively on the basis of the external characteristics model of rectifier set and mathematical models of traction substation and traction network, by application of circuit diagram method to solve various parameters of DC short circuit for unilateral and bilateral power supply, and the steady state short circuit current of DC traction network has been calculated by means of analyzing of living examples.