电牵引供电系统故障的对称分量统一解析法

Unified Analysis of Railway traction Power Supply System Faults by the Method of Symmetrical Components

将电牵引供电系统作为具有不对称串联阻抗的网络，提出电牵引供电系统故障分析的通用等效电路，应用对称分量法，推导出牵引供电系统的序网络阻抗矩阵计算公式，建立统一序网方程和序网络。根据电牵引供电系统的特点，把故障归结为广义两相短路和广义三相短路两大类，形成相应的复合序网，推导出两类短路电流序分量计算通式。从而建立电牵引供电系统故障的对称分量统一解析方法。

Regarding the railway traction power supply system as the network with theunsymmetrical series impedances,this paper presents a general three-phase equivalent circuitused in the fault analysis of the system,Using the method of symmetrical components,theformulae of the sequence network impedance matrix are derivated from the system,theunified sequence network equations and sequence networks are established,the sequencenetwork connections are formed as regards the generalized line-to-line fault and thegeneralized three-phase fault on the system,and the general formulae of the two kind faultcurrent sequence components are derivated.It concequently establishes the unified analysisby the method of symmetrical components.