【摘要】 分别阐述了双母线微机保护中母联带单CT和双CT时,发生母线故障和死区故障时的保护逻辑,同时指出它们各自的优缺点。针对现有的母联双CT交叉接线方式,提出一种能够正确判别是母线故障还是死区故障的方法,同时对母联死区故障的保护原理提出一种改进措施。更多还原

【Abstract】 This paper describes differential protection’s logic on busbar or dead-zone fault when coupler has one or two TAs,as well as their advantages and limitations.Aiming at present across connective mode of the coupler with two TAs,a scheme that can rightly judge busbar or dead-zone fault is presented and an improved method on protection principle of dead-zone fault is proposed.更多还原