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One case of mistaken transformer differential protection cause's analysis and countermeasures
Author(s): 
Pages: 78-80,88
Year: Issue:  10
Journal: RELAY

Keyword:  消除零序电流差动保护控制字整定计算对策;
Abstract: 变压器微机型差动保护误动的原因较多,该文以终端变在进线上发生接地故障时终端变主变差动保护误动为例,仔细分析误动产生的原因,并分析各种差动保护消除零序电流的措施.文中所有的事例均源于现场,从控制字的整定、容量或变比计算两个方面加以分析,希望引起同行们的注意.
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