CAJ | 학술논문

介绍双母接线中母联带单侧CT和双侧CT两种情况下, 发生母线故障和母联死区故障时的保护逻辑进行了阐述,指出传统保护逻辑的优缺点. 针对现有母联配置双CT情况下发生死区故障依然要跳两条母线的问题, 对母线死区保护的逻辑进行改进, 改进逻辑在死区故障时仅切除一条母线, 较传统逻辑有较大优越性.
개소쌍모접선중모련대단측CT화쌍측CT량충정황하, 발생모선고장화모련사구고장시적보호라집진행료천술,지출전통보호라집적우결점. 침대현유모련배치쌍CT정황하발생사구고장의연요도량조모선적문제, 대모선사구보호적라집진행개진, 개진라집재사구고장시부절제일조모선, 교전통라집유교대우월성.
This paper describes differential protection logic on busbar and dead zone fault when coupler has one or two CTs, as well as their advantages and limitations. To counter the problem that protection must trip two busbars on dead zone fault when coupler has two CTs, an improved protection logic on dead zone fault is proposed. The improved protection logic just trips one busbar on dead zone fault, which has more advantages than the traditional logic.