牵引变电所电气量的通用变换方法及其应用

A GENERALIZED TRANSFORMING METHOD FOR ELECTRICAL VALUES IN A.C.TRACTON SUBSTATIONS AND ITSAPPLICATIONS

本文给出适于各种接线方式的牵引变电所两侧电气量的通用变换关系。得出的主要结论有：（１）次边具有既不相同也不反向接线角的任意两端电气量与原边三相电气量可相互转换，其变换阵是由端口变比和接线角唯一确定的；（２）电流、电压变换阵都是实数阵。如，次边端口电压是原边三相电压的实系数的线性组合，原边三相电流是次边端口电流的实系数的线性组合，等等；（３）三相－两相变压器都是可逆的。文中还侧重讨论了通用变换关系下牵引供电系统的三相和二相等效模型及其应用。

A generalized transform method for electrical values in A.C. traction substationsis given in this paper. Some important conclusions are as follows:(1)For a transformer,baving any two secondary-side ports with different connectionangles,the primary and secondary-side electrical values can be converted towards each Other,and the transform matrices are determined solely by ratio of turns and connection of thetransformer. (2)The voltage and current matrices are real ones.That is to say,the voltages on secondary-side ports are the linear combination with real coefficients of 3-phase voltages on primary side; and the 3-phase currents are the linear combination with real coefficients of thecurrents on secondary ports. (3)All of 3-phase/2-phase transformers can be used conversely.Three-phase and two-phase equivalent models of traction power supply system and their applications are also discussed briefly.