微机母线保护在开关站的应用及分析

The Application and Analysis of the Microcomputer Bus Protection in Switch Station

LFP—975专用母线保护采用了以差电流为总起动元件 ,以母联电流方向或两母线间序电压差值 (方向·幅值 )作为故障母线选择元件的工作原理。本文在保护装置运行的基础上 ,对母线短路时以序电压比较作为故障母线选择元件的灵敏度进行了分析 。

Special bus protection LFP-975 has adopted the work principle that the difference current is taken for start component, and bus joint current flows direction or the different value(direction·value) of order voltage between two bus is regarded as the trouble bus selection component. Based on the protection device operating, this article analyzes the sensitivity that the order voltage comparison is regarded as the trouble bus selection component during bus short-circuit at the same time, it puts forward the parameter modification method by way of calculation.