摘要
在进行某站内220 kV母差保护装置改造过程中,发现国电南自厂家生产的FCX-12HP型操作箱只有3个永跳(TJR)节点,分别用于启远跳和启失灵功能。按照南网反事故措施的要求,需取消操作箱第一组和第二组操作电源自动切换功能。在该功能取消后,当第一组操作电源失电时,压力监视电源也失电,则同时会导致三跳节点(TJR)分别启A、B套母差保护的失灵回路功能消失,即不具备了失灵再失灵的功能。针对这类操作箱,特制定了相应的整改方案,从而使得三跳节点(TJR)分别启A、B套母差保护的失灵回路满足相互独立的要求。
During the transformation of the 220 kV bus differential protection device in a station,it was found that the FCX-12HP type operation box produced by Guodian South’s own manufacturer has only three permanent jump(TJR)nodes,which are used for remote jump and start failure functions.In accordance with the requirements of the China Southern Power Grid’s anti-accident measures,the automatic switching function of the first and second operating power supplies of the operation box needs to be cancelled.After this function is cancelled,when the first group of operating power loses power,the pressure monitoring power supply will also lose power at the same time.At the same time,it will cause the failure circuit function of the three-hop node(TJR)to activate A and B sets of bus differential protection respectively to disappear,that is,it does not have the function of failure and then failure.For this type of operation box,a corresponding rectification plan has been formulated.The three-hop node(TJR)enables the failure circuits of A and B bus differential protections to meet the requirements of mutual independence.
作者
何承涛
HE Chengtao(Guizhou Power Grid Co.,Ltd.,Kaili Power Supply Bureau,Kaili 556000,China)
出处
《通信电源技术》
2021年第5期13-16,21,共5页
Telecom Power Technology
