新型电子式电流互感器测量精度分析  

Analysis of measurement precision of electronic current transducer

作　　者：郭郴艳[1] 游大海[1] 

机构地区：[1]华中科技大学电气与电子工程学院,湖北武汉430074

出　　处：《电力自动化设备》2006年第8期27-29,共3页Electric Power Automation Equipment

摘　　要：通过对新型电子式电流互感器的基本测量原理进行介绍和分析可知:采用Rogowski线圈为传感头的电子式电流互感器,就必须再加入积分环节,从而使电子式电流互感器的精度受积分器精度的影响较大。从集成运放输入失调电压、偏置电流及其漂移、集成运放增益和带宽、温度变化对积分电路的影响3个方面分析了传统的模拟积分器对测量精度的影响,并总结出了误差公式。最后,提出了数字式积分器的必要性和可行性,给出了数字式积分器的实现方案。From the analysis of the basic measuring principle of the electronic current transducer, the current transducer with Rogowski coil as its sensor must apply the integrator,the precision of which influences greatly the precision of electronic current transducer, The influence of traditional analog integrator on measuring precision is analyzed from three aspects of integrated operational amplifier：the maladjusted input voltage,bias current and its drift,the gain and band width and the temperature change. The error formula is summarized. The necessity and feasibility of the digital integrator are presented,and its realization plan is provided.

关 键 词：电子式电流互感器 ROGOWSKI线圈 模拟积分器 数字式积分器 

分 类 号：TM452[电气工程—电器]