变电站母差保护分列压板投退时机的分析研究

Research on Operating Opportunity of Substation Busbar Differential Protection Separation Connecting Piece

详细分析继电保护“六统一”标准实行前后,母差保护分列压板的投退操作对母差保护的影响,提出两种类型母差保护的不同投退操作方案。结合与备自投或负荷转供装置配合的分析,确定了备母联方式下分列压板应处的状态。提高了母差保护运行的可靠性,为变电站日常倒闸操作和工作现场安全措施布置提供借鉴。

The operation influence of the separation connecting piece on the busbar differential protection before and after the implementation of the“six unified” standard of relay protection is analyzed in detail.Two different operation schemes of the busbar differential protection are put forward.Combined with the analysis of the coordination with the backup self-feeding or load transferring device,the states of the separation connecting piece in the backup bus mode are determined.It improves the reliability of busbar protection operation and provides reference for the routine switching operation of substation and the arrangement of safety measures on the working site.