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The problem existing in automatic close-up device of stand-by power supply used in sectionalized single bus scheme and its solving measures
Author(s): 
Pages: 133-135,141
Year: Issue:  7
Journal: Relay

Abstract: 单母分段接线与内桥接线在运行方式上极为相似,但目前的备自投装置不能直接应用于终端变不配置母线保护的单母分段接线方式,存在母线故障无法闭锁备自投的问题.提出增加带反方向的线路保护作为母线故障时备自投的闭锁条件.同时,在进线备自投逻辑中,带反方向的线路保护无法选择性区分母线故障,造成任一段母线故障一律闭锁备自投,导致负荷全部丢失的后果.提出在进线备自投逻辑中增加判断母联是否流过故障电流的判据,而母联故...
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