电压互感器断线原理与应用  

Principle and application of loss-of-potential logic

作　　者：原治安[1] 

机构地区：[1]焦作万方铝业股份有限公司,河南焦作454172

出　　处：《电力自动化设备》2009年第8期147-150,共4页Electric Power Automation Equipment

摘　　要：详细介绍了美国SEL公司SEL-311C、SEL-749M、SEL-751A电压互感器断线功能,及深圳南瑞公司的ISA-351G馈线保护、ISA-367G线路保护、ISA-353G线路光纤纵差保护、ISA-388G变压器后备保护、ISA-359G电容器保护和ISA-347G电动机保护的电压互感器断线功能,分析其逻辑原理,总结优缺点,提出了合理使用电压互感器断线功能的方法。美国SEL公司继电保护装置采用电压互感器断线逻辑判定电压互感器断线,可以灵活运用SEL继电器所具有的逻辑编程功能,编制电压、电流、断路器位置及时间等元件组成的逻辑方程,在电压互感器一相、两相或者三相断线时,进行电压互感器断线判别及进行电压互感器断线闭锁保护的应用。深圳南瑞公司继电保护装置具有母线电压互感器断线逻辑、线路电压互感器断线逻辑,其逻辑中含有电压、电流、断路器位置或时间等元件,在电压互感器一相、两相或者三相断线时,均能够进行电压互感器断线判别及进行电压互感器断线闭锁保护的应用。The loss- of- potential logic of potential transformer SEL- 311C,SEL- 749M and SEL- 751A of SEL is introduced in detail,as well as the loss-of-potential logic of relay protection ISA-351G,ISA-367G, ISA- 353G,ISA- 388G,ISA- 359G and ISA- 347G. Their principles are analyzed,their advantages and disadvantages are summarized, and their reasonable applications are presented. SEL relay takes the PT break as the criterion of loss- of - potential,programming the logic equations of voltage,current,location and time elements to detect PT break and block the protection during one-,two- or three-phase PT break. Nari relay has bus PT break logic and line PT break logic of voltage ,current,location and time elements to detect bus or line PT break and block the protection during one-,two- or three-phase PT break.

关 键 词：电压互感器断线 继电保护 闭锁 断线逻辑 逻辑编程 

分 类 号：TM451[电气工程—电器]