电测与仪表2017，Vol.54Issue(19)：1-6,6.
PEVT和AEVT在实验室和在线运行状态下误差特性比较研究
Research on error characteristics comparison of PEVT and AEVT under the conditions of laboratory and on-line operation
摘要
Abstract
PEVTs and AEVTs are currently two kinds of typical EVTs in operation of power grid , but they would be required to calibrate error characteristics again before the operation .In order to research error characteristics of EVTs in three states of laboratory and field off-line and on-line operation , PEVT and AEVT samples from two mainstream manufacturers were selected to carry out the comparative study of error characteristics .The results show that the effect of the testing environment on ratio error of PEVT is less than 0 .05%;however , the variable quantity of ratio error in laboratory is 4.3% with the temperature in –40℃~+53.5℃ and 0.55% in on-line operation in the temperature range of -20℃ ~40℃.The ratio error of AEVT is sensitive on the test environment with the error from laboratory 0.03%, off-line scene 0.18%and on-line operation 0 .36%;but the variable quantity of ratio error in laboratory is 0.21% within the temperature range of -40 ℃~+63 ℃ and 0.1% in on-line operation within the temperature range of -20℃ ~40℃.In addition, the temperature characteristics of EVTs is sensitive to temperature gradient , and the temperature characteristic in on-line operation is better than in laboratory .关键词
PEVT/AEVT/测试环境/在线运行/误差特性Key words
PEVT/AEVT/test environment/on-line operation/error characteristics分类
信息技术与安全科学引用本文复制引用
胡浩亮,陆以彪,徐子立,李登云,熊前柱,肖霞..PEVT和AEVT在实验室和在线运行状态下误差特性比较研究[J].电测与仪表,2017,54(19):1-6,6.基金项目
国家电网公司科技项目( JL71-15-040) （ JL71-15-040）
