宁夏电力Issue(2)：51-57,7.DOI:10.3969/j.issn.1672-3643.2025.02.008
基于电容量初值差的CVT电容元件击穿诊断方案
A breakdown diagnosis method for CVT capacitor components based on initial capacitance difference
摘要
Abstract
This study aims to enhance the accuracy of detecting breakdown defects in capacitor voltage transformers(CVT)through capacitance measurements.Two schemes are introduced to address the issues of low precision of C11 measurements and the influence of temperature on capacitance calculations.First,the low-voltage shield method with full-shield reverse wiring is employed to boost the precision of C11 capacitance testing.Secondly,the isomorphic-isotropic isothermal proportional method is utilized to adjust the capacitance to its factory temperature before calculating the initial value difference,thereby diminishing temperature effects on the outcomes.Finally,a case study involving a CVT capacitor component breakdown confirms that the proposed approach can effectively identify single-chip capacitor component faults,significantly enhancing test accuracy and preventing erroneous assessments of the CVT′s condition.关键词
电容式电压互感器(CVT)/电容量/电容元件/分压器Key words
capacitive voltage transformer(CVT)/capacitance/capacitor components/voltage divider分类
动力与电气工程引用本文复制引用
轩莹莹,杨凯楠,刘晓飞..基于电容量初值差的CVT电容元件击穿诊断方案[J].宁夏电力,2025,(2):51-57,7.基金项目
国网河北省电力有限公司科技项目(kj2022-036) （kj2022-036）
