多相输电线电磁暂态行波分析

本文利用经典方法严格地求解了描述多相输电线电磁特征的矩阵偏(?)分方程,给出解析表达式。在求解中考虑了与频率有关的参数。在该解析式中,通过输电线参数和故障距离确定所有不同频率的行波因素。从而有利于分析行波保护和与行波保护有关的问题(?)。根据数学解答和物理现象,提出一种行波保护的判据。本文考虑了有损耗输电线的参数频率特性。文中给出了一些概念。为核对所得结果采用了G.W.Swiftn论文中的一个实例。最后在附录中用数学方法验证了所得结果的正确性。

Analysis of the Electromagnetic Transient Travelling-waves in Polyphases Transmission-Lines

This paper solves the matrix partial differential equations which describe electromagnetic behavior on polyphases transmission lines using classical method strictly, and gives formula solutions. The frequency-dependent parameters are considered. In the solutions,all factors of the travelling-waves with different frequency are determinated by transmission-line parameters and faulted distance. Therefore, it is beneficial to the analysis of the travellingwave protections and the problems relating to the travelling-wave protection. Anew criterion of the travelling-wave protection is presented from the mathematicalsolution and physical phenomenon. Present work considers parameter frequency-characteristic with the loss lines.In the paper, several concepts are given. An example is taken which covmes from G.W.Swiftns paper to check the results. In the appendix, correctness of the solutions is proved mathematically.