摘要
电流互感器是电能计量装置重要组成部分,其误差是电能计量装置误差主要来源之一。本文分析了电流互感器误差的影响因素。分析表明:电流互感器的误差主要受两方面影响:一是电流互感器的结构,如铁芯尺寸、形状、材料以及线圈匝数;二是电流互感器的工作条件,即一次电流大小和二次绕组的负载阻抗,并就减小误差方法进行分析。最后,介绍了实际使用中如何根据参数选择合适的电流互感器。
Current transformers are part of power metering systems. Its error is one major source of error of energy metering device. In this paper, error factors are introduced. Analysis shows errors are mainly affected by two aspects： one is structure, such as the size of iron core, shape, material and turns of windings. The other is working conditions, such as the primary current and the burden that connected with the secondary winding. Methods to reduce the error are introduced. At last, ways that how to chose appropriate current transformers are presented.
出处
《仪器仪表标准化与计量》
2014年第1期32-34,共3页
Instrument Standardization & Metrology
关键词
电能计量装置
电流互感器
误差
励磁电流
应用
Power Metering Systems Current Transformers Error Excitation Current Application
