自励源电子式互感器的唤醒电流和唤醒时间  

The Wake up Current and Wake up Time of Electronic Current Transformers with Self Excitation Power Supply

作　　者：刘忠战 郑新才 忤勋 杨小春[3] 

机构地区：[1]西安华伟光电技术有限公司,陕西西安710119 [2]商丘市电力公司,河南商丘476000 [3]西安高压电器研究院有限责任公司,陕西西安710077

出　　处：《高压电器》2009年第3期78-80,共3页High Voltage Apparatus

摘　　要：介绍了电子式电流互感器的"唤醒电流"和"唤醒时间"概念,阐述了在实际应用中降低唤醒电流以及缩短唤醒时间的物理意义。在详细分析自励供电原理的基础上对如何降低唤醒电流、缩短唤醒时间提出了若干改进措施,提供了相应的试验数据和实例,并对应用效果作了介绍。结果表明:自励源结构的电子式电流互感器,性能稳定可靠,试验样机准确反映了电路故障电流,并使保护系统做出了正确的判断与动作,表明该型互感器在短路大电流情况下工作的可靠性。This paper introduces the concept of ＂wake up current＂ and ＂wake up time＂ and the physical meaning of reducing wake up current and wake up time in application of electric power net. By analyzing the principle of self excitation power supply, some improving methods for reducing wake up current and wake up time are provided, and the relevant experimental data and examples are offered. In addition, the effectiveness of the methods in application is also discussed.

关 键 词：自励源 电子式电流互感器 唤醒电流 唤醒时间 

分 类 号：TM45[电气工程—电器]