中文摘要：

为研究一种电气化铁路高压电缆牵引网电缆短路特性,在充分考虑电缆弗兰梯效应的基础上,建立了电缆短路运行的5种基本支路,并对其电压、电流特性进行分析。采用支路分析法对主变二次侧绕组中点接地系统单相接地模型、主变绕组中点不接地系统单相接地模型和主变绕组中点不接地系统两相短路模型的电气特性进行了分析,并利用Matlab/Simulink仿真平台对分析结果进行验证。仿真结果表明,支路分析法用于高压电缆牵引网的短路特性分析是有效的,主变绕组中点接地与否会影响电缆的绝缘电压等级。

英文摘要：

In order to study the short-circuit characteristics of high-voltage cable traction network（CTN）applied to electrified railway,five basic branches running under short-circuit operation are established considering the cable’s Ferranti effect.On this basis,the voltage and current characteristic of branches are analyzed.Branch analysis is adopted in the single-phase short-circuit model of main transformer（MT）secondary winding midpoint grounded system,singlephase short-circuit model of MT winding midpoint ungrounded system and two-phase short-circuit model of MT winding midpoint ungrounded system.Simulations are conducted in Matlab/Simulink platform to validate the analysis results.It is shown that branch analysis is effective in analyzing the short-circuit characteristics of high-voltage CTN,and the grounded type of MT winding midpoint will affect the insulation voltage level of cables.