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| 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。 |
| 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 |
| DOI： |
| 分类号:TM452 |
| 基金项目: |
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| Analysis of measurement precision of electronic current transducer |
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GUO Chen-yan YOU Da-hai
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| Abstract: |
| 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. |
| Key words: electronic current transducer,Rogowski coil,analog integrator,digital integrator |
