电力系统自动化Issue(13)：163-167,5.DOI:10.7500/AEPS20140703009
数字量输出电子式电压互感器的高精度在线校验方法
A High Accuracy On-line Calibration Method for Electronic Voltage Transformers with Digital Output
摘要
Abstract
To overcome the problems of existing calibration methods for electronic transformers (ETs),such as the need of power off and complicated operation,an on-line calibration system for electronic voltage transformers (EVTs) with digital output is proposed.By employing a rhombic hoist,the standard voltage transformer can be connected to the high voltage bus, and then a standard voltage on-line measuring unit that can measure the high voltage signal on-line is constructed,realizing on-line calibration of the running voltage transformer. In this paper, the factors affecting system accuracy, such as the synchronization methods and the software algorithm,are analyzed in detail,and measures to reduce errors are taken.The system developed has been certified and applied on the spot,the accuracy better than grade 0.05. This work is supported by Hubei Provincial Natural Science Foundation of China(No.2014CFB680).关键词
电子式电压互感器/在线校验/数字量输出/数据采集Key words
electronic voltage transformers/on-line calibration/digital output/data acquisition引用本文复制引用
李振华,李闯,李振兴,邱立,邾玢鑫..数字量输出电子式电压互感器的高精度在线校验方法[J].电力系统自动化,2015,(13):163-167,5.基金项目
湖北省自然科学基金资助项目(2014CFB680)。 （2014CFB680）
