牵引变电所基波和谐波通用模型

A GENERAL MODEL OF TRACTION SUBSTATIONS AT HARMONIC AND FUNDAMENTAL FREQUENCIES

牵引变电所是联结牵引供电系统和电力系统的变换单元。为揭示牵引变电所在基波特別是谐波下的拓扑结构特征并准确描述和分析牵引供电系统不对称谐波在三相系统的行为过程,本文通过系统等效变换,首次提出SCOTT、Y/△-11、V/V等几种常用结线牵引变电所的三相通用模型,从而使包括牵引侧并联补偿装置或滤波装置在内的整个牵引变电所在基波和谐波下的行为分析与三相统一起来。

The traction substation is a system-transform unit connecting the railway electric traction system and the public power system. In order to reveal the topological characteristics of the traction substations of various connections at harmonic and fundamental frequencies and to accurately describe and analyse the 3-phase behavioural process of assymetric harmonics generated in the traction systems, the authors of this paper, by carrying out equivalent system transforms, put forward a general model for the SCOTT, Y/△-11 and V/V connected traction substations. It consequently becomes possible to unify thebehaviour analysis of the traction system (including the parallel compensation devices or the filtering devices on the traction side) at harmonic and fundamental frequencies with that of the 3-phase power system.