中国铁道科学2012，Vol.33Issue(5)：76-81,6.DOI:10.3969/j.issn.1001-4632.2012.05.12
间歇性重负荷工况下变压器套管介质损耗因数测量方法的改进研究
Improvement Study on the Measurement Method for the Dielectric Loss Factor of Transformer Bushing under Intermittent Heavy Load
摘要
Abstract
According to the analyses of long-term field measured data, the traction power supply system of Datong-Qinhuangdao Railway has the characteristics of great variation in load amplitude, high overload factor as well as abrupt and intermittent heavy load. The load change of traction power supply system had influence on the measurement of the dielectric loss factor of transformer bushing, and the initial current of transformer bushing wiring equivalent circuit had interference in the measurement accuracy of dielectric loss factor before and after load change. Matlab/Simulink was adopted to simulate the wiring equivalent circuit of transformer bushing, which validated the correctness of the analysis results. Traditional measurement method was improved by introducing the initial current of transformer bushing wiring equivalent circuit to determine correction coefficient. The improved method was used to measure the dielectric loss factor of transformer bushing in substation. Results show that the measured value of dielectric loss factor is stable, reliable and accurate, which is advantageous to the accurate monitoring of the insulation aging of transformer HV bushing.关键词
介质损耗因数/测量方法/变压器/牵引供电/负荷/初始电流Key words
Dielectric loss factor/ Measurement method/ Transformer/ Traction power supply/ Load/ Initial current分类
交通工程引用本文复制引用
孙继星,吴广宁,周利军,陈立,文德斌,杜培东,刘益岑..间歇性重负荷工况下变压器套管介质损耗因数测量方法的改进研究[J].中国铁道科学,2012,33(5):76-81,6.基金项目
国家"九七三"计划项目(2011CB711105) （2011CB711105）
