牵引网馈线微机保护的实用算法

The practical algorithm for digital distance protection of tractive power feed lines

摘要通过分析电气化铁道供电系统电力牵引网不同供电和不同种类短路电流暂态分量,提出以电流突变量作为起动判据及电流速断保护的依据,以差分方程配合全波傅里叶算法作为牵引网馈线Ⅰ、Ⅱ段距离保护的算法,并用此算法进行了仿真验证,文中的观点对牵引网馈线微机保护的实现具有参考指导作用。

This paper analysed the transient current component of different types of short circuits and power supply tractive feed lines in electrified railway power supply systems. Based on suddenly changed current information, a starting up criterion and a fast current breaking criterion are proposed. Distance protection algorithm using difference equation combined with full wave Fourier transformation was given. Simulation studies have carried out for the algorithmvalidation. The concepts in this article are of supervisory valuein the realigation of microcomputer protection of tractive power feed lines.