电测与仪表2012，Vol.49Issue(12)：41-45,5.
影响电子式互感器校验系统设计精度的关键技术
Key Technology of High-accuracy Design of Electronic Transformers Calibration System
摘要
Abstract
In this paper, some key factors affecting electronic instrument transformers (CSEIT) accuracy, including signal measurement, sampling synchronization, digital signals processing and metrological traceability are analyzed, and the corresponding solutions are also offered. Taken HP 3458A multimeter as measurement system, the paper shows that the selection of reference source transformer, sampling synchronization, merging unit synchronization and digital signal processing technology. Furthermore, the method of multi-filters and DSP fusion is proposed to enhance the accuracy of CSEIT based on off-line character for measurement signals. At the same time, a novel metrological traceability scheme of CSEIT is proposed based on FLUKE 5720A, a multifunction calibrator with an accuracy of one per ten thousand, and BHE-I type. Results of verification show that the designed CSEIT can has higher accuracy and better reliability.关键词
电子式互感器/校验系统/HP3458A/数字信号处理/溯源Key words
electronic transformers/ calibration system/ HP3458A/ digital signal processing/ traceability分类
信息技术与安全科学引用本文复制引用
张明珠,李开成,李振兴..影响电子式互感器校验系统设计精度的关键技术[J].电测与仪表,2012,49(12):41-45,5.基金项目
国家自然科学基金资助项目(51077058) （51077058）
河南省教育厅科学技术研究重点资助项目(12A110022) （12A110022）
