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Analysis of the adaptive scheme of identifying the substituting situation
Author(s): 
Pages: 14-16,40
Year: Issue:  15
Journal: RELAY

Keyword:  母线差动保护旁母代路运行误动;
Abstract: 带旁路母线的母线接线方式,当投入代路运行时,将影响大差回路差动电流的计算,使起动元件失去选择性,并且在倒闸过程中,由于实际运行方式的不可知,可能引起保护误动作.分析了母线代路运行和常规运行的特点,总结两种运行方式对母联单元接线系数的影响,提出了一种在微机保护平台上,结合刀闸位置和压板输入,自适应地选择大差计算公式的新方案,并且在倒闸过程中,采用两种差动计算公式"与"的方法,提高了母差保护动作的正确性.
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