数字量输出型直流电压互感器的误差特性分析  

Error characteristic analysis of digital output type DC voltage transformer

作　　者：李登云[1] 雷民[1] 熊前柱[1] 聂琪[1] 沈曙明 章江铭 

机构地区：[1]中国电力科学研究院,湖北武汉430074 [2]国网浙江省电力公司电力科学研究院,浙江杭州310014

出　　处：《现代电子技术》2018年第4期119-123,共5页Modern Electronics Technique

基　　金：国网公司科技项目(JL71-15-042)~~

摘　　要：针对数字量输出型直流电压互感器实际误差情况及误差特性研究不足的现状,建立数字量输出型直流电压互感器的误差分析模型,完成现场校准试验,得到实际误差情况,并详细分析误差特性。结果表明,数字量输出型直流电压互感器存在超差现象,但可以通过误差修正达到0.2级要求;基本误差的线性度为0.1%~0.2%;升降变差和短时稳定性均在10-4数量级;存在零点漂移现象,经过零点修正,线性度优化了0.08%,10%额定电压下的测量准确度提高了0.1%。In view of the lack of research on the actual error condition and error characteristics of the digital output type DC voltage transformer,an error analysis model of the digital output type DC voltage transformer was established. The field calibration test was completed,the actual error condition was obtained,and the error characteristics were analyzed in detail. The results show that:There exists the phenomenon of over tolerance in the digital output type DC voltage transformer,but it can meet the 0.2 level requirements by means of error correction;The linearity of basic errors is about 0.1% to 0.2%;Both the rise and fall variation and the short time stability are 10-4 orders of magnitude;The phenomenon of zero drift exists,and the zero correction improves the linearity by 0.08%,as well as enhances the measurement accuracy by 0.1% at 10% rated voltage.

关 键 词：数字量输出 直流电压互感器 误差特性 误差分析模型 线性度 零点漂移 

分 类 号：TN722.743.4[电子电信—电路与系统] TN721