电测与仪表2024，Vol.61Issue(10)：82-87,6.DOI:10.19753/j.issn1001-1390.2024.10.011
基于主元-分形理论的电子式电压互感器计量误差自主辨识方法研究
Research on the autonomous identification method of the metering error of the electronic voltage transformer based on principal component-fractal theory
摘要
Abstract
Electronic voltage transformer(EVT)is composed of a large number of electronic units,which is easy to fall in fault under the influence of the complex operation environment of substation.The long-term stability of its metering error is poor.The conventional detection method is to compare and calibrate with the standard transformer regularly.It is a sampling inspection method for EVT,and it is unable to evaluate the impact of EVT metering data on node power accumulation.To solve this problem,firstly,based on the three-phase symmetrical operation char-acteristics of power system nodes,the metering data of three-phase EVT are analyzed by principal component analy-sis,and SPE statistics are established in the residual subspace to realize the self-detection of EVT metering error.Secondly,the autonomous identification of EVT measurement error degradation form is realized by calculating the fractal dimension of SPE statistics during EVT operation.The research results are helpful to promote the develop-ment of EVT state detection from regular detection to on-demand detection.关键词
电子式互感器/计量误差/主元分析/分形理论/自主辨识Key words
electronic voltage transformer/metering error/principal component analysis/fractal theory/autono-mous identification分类
信息技术与安全科学引用本文复制引用
李宾宾,张竹,黄杰,张孟鹃,朱胜龙,马亚彬..基于主元-分形理论的电子式电压互感器计量误差自主辨识方法研究[J].电测与仪表,2024,61(10):82-87,6.基金项目
国家电网有限公司科技项目(SGAHDK00FZJS2100058) （SGAHDK00FZJS2100058）
