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Improvement of duplicating 220 kV bus differential protection in 500 kV substation
Author(s): 
Pages: 72-75
Year: Issue:  10
Journal: RELAY

Keyword:  母差双重化失灵保护危险点回路改造可靠性;
Abstract: 介绍一个500 kV变电站进行220 kV母差双重化改造工程的概况,阐述了在改造过程中,根据施工环节,详细分析现场工作环境,制定相关的施工流程,严格控制危险点,在保证旧母差保护正常运行的基础上,安全地接入了新母差保护装置和断路器失灵保护装置,同时进行了回路优化改造,实现了220 kV母差保护双重化配置,有效提高了该变电站母差保护和断路器失灵保护动作的可靠性.
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