智能变电站简易母线保护

分析了低压母线的保护配置现状,提出了一种简易母线保护新方案。该方案根据低压母线主接线特点抽象出母线单元模块,各母线单元模块根据本母线进线、分段开关的过流情况及其他母线单元模块的开关过流情况,结合出线保护的闭锁信号,实现小电源、进线和分段的选择性跳闸,达到快速切除母线故障的目的。

Simplified Bus Protection for Smart Substation

This paper analyzes the present applications of low voltage bus protection, and presents a new solution of simplified bus protection. Based on the characteristics of low voltage bus topology, the bus unit module is abstracted. Each bus unit module calculates the overcurrent condition of its incoming line and bus section by using the overcurrent of the other bus unit modules. By referring to the blocking signals from the outgoing line protection, selective tripping of weak power, incoming line or bus section is realized and fast fault clearing achieved.