微机型母线保护存在的若干问题及解决方案

母线保护装置的可靠性关系到电网系统的安全、稳定运行,但微机型母线保护装置在软硬件设计制造上存在一定缺陷,本文分析了母联开关位置对微机型母线保护装置灵敏度的影响,隔离刀闸辅助触点位置对母差保护的重要性,基准变比对CT断线的影响,母联兼侧路CT极性转换,以及双母双分段母线系统的特殊操作性,并由此提出了解决问题的措施。

Problem of microprocessor-based bus-bar protection and settlement

Reliability of bus-bar protection has contact with safe and steady service of the net,but microprocessor-based bus-bar protection has some defects in design and production of software or hardware.This paper analyzes the influence of position of coupler on sensitivity of microprocessor-based bus-bar protection,the importance of auxiliary point of isolator to bus-bar protection,the influence of datum ratio on TA wire-break,TA reversal of pole of coupler and pass-by,and characteristic operation of the 4-section bus-bar system. Thus some countermeasures are also put forward.