基于光电式互感器的故障指示器设计  

Design of Fault Indicator Based on Photoelectric Transformer

作　　者：王敬华 赵卫斌 徐丙垠 卓梦飞[2] WANG Jinghua;ZHAO Weibin;XU Bingyin;ZHUO Mengfei(Shandong Kehui Electric Co.,Ltd.,Zibo 255087,China;Shandong University of Technology,Zibo 255049,China)

机构地区：[1]山东科汇电力自动化股份有限公司,山东淄博255087 [2]山东理工大学,山东淄博255049

出　　处：《供用电》2018年第5期19-24,共6页Distribution & Utilization

基　　金：国家电网公司科技项目(52130416000D)~~

摘　　要：介绍了基于光电式互感器的故障指示器的系统构成、工作原理及现场应用情况。利用光电式互感器实现了故障指示器高压侧与低压侧的模拟量传输,解决了光纤传输模拟量的精度与带宽问题。利用单相电压突变量作为启动条件,有效地解决了接地故障时,故障指示器的启动灵敏度问题。针对故障指示器供电电源可靠性问题,设计了一种利用电容分压的新型取电装置。现场实际运行情况证明,基于光电式互感器的故障指示器,在解决录波启动灵敏度、暂态信号采集精度和提高供电可靠性问题上效果明显。The system structure,working principle and field application of fault indicator based on photoelectric transformer are introduced.The use of photoelectric transformer realizes the analog transmission of the high-side and low-voltage sides of the fault indicator,and solves the problem of the accuracy and bandwidth of the analog quantity of optical fiber transmission.Using the single-phase voltage abrupt change amount as the starting condition,the problem of starting sensitivity of the fault indicator is effectively solved when the ground fault occurs.Aiming at the reliability of fault indicator power supply,a new type of power take-off device based on capacitive voltage division is designed.The actual operation of the site proves that the fault indicator based on the photoelectric transformer has obvious effects in solving the problem of recording start sensitivity,transient signal acquisition accuracy,and improving power supply reliability.

关 键 词：故障指示器 光电式互感器 光纤传输 信号录波 取电装置 

分 类 号：TM73[电气工程—电力系统及自动化]