Abstract：As the developing of electronics technology and digital signal processing, electronic current transformer is becoming mature. Because of its wide dynamic range and frequency band, and non magnetic saturation, the electronic current transformer is replacing the traditional current transformer in power system. As an application, an all-digital on-line calibration system for high voltage current transformer is proposed in this paper. It is based on a kind of high accurate clamp-shape air core coil for sensor and uses optical fiber transmission system for signal transmission and power supply. Finally it realizes the digital integrator and fourth-order convolution window algorithm for error calculation method by the virtual instrument in personal computer. This system can monitor high voltage current transformer on line, and improves the reliability of power system greatly. The experimental results show that, this system can reach the 0.05 accuracy class, and the on site operation results prove that it easy to operation and has high reliability.
童悦, 李红斌, 张明明, 阎东, 王壅. 一种全数字化高压电流互感器在线校验系统[J]. 电工技术学报, 2010, 25(8): 59-65.
Tong Yue, Li Hongbin, Zhang Mingming, Yan Dong, Wang Yong. An All-Digital On-Line Calibration System for High Voltage Current Transformer. Transactions of China Electrotechnical Society, 2010, 25(8): 59-65.
2010, Vol. 25 
