自耦变压器供电牵引网接地回流网络的特征阻抗矩阵的求取  

Determination of Characteristic Impedance Matrix of Earth Return Circuit for Autotransformer-Fed Traction Power Network

作　　者：马庆安[1] 刘炜[1] 徐英雷[1] 唐伟 

机构地区：[1]西南交通大学电气工程学院,四川省成都市610031 [2]中国中铁二院电化院,四川省成都市610031

出　　处：《电网技术》2013年第6期1764-1768,共5页Power System Technology

摘　　要：自耦变压器供电牵引网接地回流网络的特征阻抗矩阵的既有求解方法在原理上是不当的。对于半无限长接地回流网络,从任意端口向无限远看去的特征阻抗矩阵应相同。为此,利用接地回流网络的传输参数矩阵,推导出特征阻抗矩阵须满足复数形式的黎卡提代数方程,并可利用特征分解法进行求解。算例表明,所提方法与既有方法的计算结果相近。灵敏度分析表明,特征阻抗对轨–地与贯通地线–地电导的变化最为灵敏。It is incorrect in principle for existing method to derive characteristic impedance matrix （CIM） of earth return circuit for autotransformer-fed （AT-fed） traction network. For semi-infinite earth return circuit, the CIM seen from any designated port to the infinite should be identical. Utilizing transmission parameter matrix of earth return circuit, it is derived that the CIM should satisfy the complex form of algebraic Riccati equation and it can be solved by eigen-decomposition method. Results of calculation cases show that the results calculated by the proposed method are close to those by existing methods, and results of sensitivity analysis show that the CIM is most sensitive to the variation of rail to earth conductance and that of grounding wire to earth conductance.

关 键 词：自耦变压器牵引网 特征阻抗矩阵 接地回流网络 黎卡提代数方程 

分 类 号：TM922.31[电气工程—电力电子与电力传动]