一种改进的微机距离保护方案

An Improved Design for Distance Protection in Microprocess-based

本文提出了一种改进的微机距离保护方案，该方案侧重考虑了母线出口短路时对系统的危害性，故要求继电保护装置此时能快速动作，切除故障，以最大限度地满足保护电网设备和维护电力系统运行的稳定性。方案中通过故障后不同时段配以相应滤波器的使用，较好地解决了输电线路母线出口处故障时保护快速动作的问题。

This paper describes an improved design for distance protection in microprocess -based,discuss mainly its dangerous when faults is Occus,and the protection must be trip fastly in order to protect device and stab11ity. By three -windows filter,the case workout the fast -done question the fault oaus near the bus.