一种用于绝缘子泄漏电流在线监测的宽频带微电流传感器的特性研究  

RESEARCH OF BROAD BANDWIDTH MICRO-CURRENT SENSOR CHARACTER FOR INSULATOR LEAKAGE CURRENT MONITORING SYSTEM

作　　者：陈攀[1] 孙才新[1] 米彦[1] 姚陈果[1] 肖立[1] 

机构地区：[1]重庆大学高电压及电工新技术教育部重点实验室,重庆市沙坪坝区400044

出　　处：《中国电机工程学报》2005年第24期144-148,共5页Proceedings of the CSEE

摘　　要：文中描述了一种宽频带微电流传感器,根据传感器的等效电路模型,针对研制的一种用于绝缘子在线监测的穿芯式宽频带微电流传感器,研究了线圈匝数、杂散电容和负载电阻的变化对通频带宽及灵敏度的影响。通过传感器电子电路的分析和saber仿真发现,在理想情况下,传感器低频下限近似为零,高频上限为无穷大。测试表明:该传感器具有通频带宽、线性度好、灵敏度高、无接触等优点,为高压绝缘在线监测系统提供了一种新的微电流传感器。A type of high bandwidth micro-current sensor designed for online monitoring of insulator is described. According to the equivalent circuit model, the effects of sensor coiling number, stray capacitance and loading resistance on pass-bandwidth and sensitivity are dicussed. The academic lower limit of the sensor is nearly zero and the upper limit is infinite, which are proved by the analysis of electronic circuit and the simulation by saber. The test of the current sensor shows that the sensor can be used in most HV insulation sysytem with broad pass-bandwidth , high linearity , high sensitivity and no contact.

关 键 词：绝缘子 在线监测 电流传感器 宽频带 穿芯式 

分 类 号：TM452.5[电气工程—电器]