高电压技术2012，Vol.38Issue(8)：1884-1890,7.
基于标准电流注入的钳式微电流传感器在线定标方法
On-line Calibration for Clamp-on Micro-current Transducer Based on Standard Current Injection
摘要
Abstract
Because air gaps of transducers are inconsistent during installation, and the parameters of their signal ~0rocessing circuits change wilh large temperature difference in operating environment, the resultant errors in operation cannot be neglected, even as for a micro current transducer precisely debugged in laboratory, and that the ratio of each sensor will deviate from the designed value. Consequently, we proposed an on-line calibration method for an air-gapped micro-current transducer based on a standard current injection. A given current signal with the specific frequency was firstly injected in the primary coil of the transducer in operation, and the frequency should be largely different from the fundamental and harmonic frequencies, whose amplitude could not be neglected, in the working current of the transducer. Then the corresponding output signal of the processing circuit of the transducer could be obtained, so that the real scale could be calculated and applied to the calculation of the primary leakage current. The transducer accuracy of experiment could be up to±0.05 %. The wdidity and accuracy of the proposed method was verified by laboratory and field testing.关键词
钳式/微电流传感器/铁芯气隙/标准电流注入/在线定标/绝缘精度Key words
clamp on/micro current transducer/iron core air gap/standard current injection/on-line calibration/insulation precision分类
信息技术与安全科学引用本文复制引用
翟学明,朱永利,熊海军,张东阳,王晓辉,黄建才..基于标准电流注入的钳式微电流传感器在线定标方法[J].高电压技术,2012,38(8):1884-1890,7.基金项目
国家自然科学基金（60974125）, （）
