电工技术学报2017，Vol.32Issue(8)：129-137,9.
基于串联电阻的特高压变压器空载直流偏磁计算
DC-Bias Calculation for UHV Transformer in No-Load by Series Resistance
摘要
Abstract
The DC-biased characteristics of UHV transformer are solved based on the time-domain field-circuit coupled model.The accuracy of the DC component about the calculated current is improved by increasing the series resistance.According to the calculations of different series resistance,the range of series resistance is deserved.The series resistance changes the circuit configuration of UHV transformer,while the voltage compensation effectively eliminates the current calculation error arising from the series resistance.The transient current is solved by the fourth Runge-Kutta,where a slope calculation corresponds to an inductance calculation.Reducing the time step appropriate can improve the calculation accuracy of current DC component and reduce the series resistance.Based on the analysis of the stability and accuracy,the precise excitation current waveforms are obtained and harmonic components are analyzed through DC bias calculation for UHV transformer in no-load with different bias currents.关键词
特高压变压器/直流偏磁/场路耦合/串联电阻/电压补偿Key words
UHV transformer/DC-bias/field-circuit coupling/series resistance/voltage compensation分类
信息技术与安全科学引用本文复制引用
王泽忠,谭瑞娟,臧英,杨箫箫,周训通..基于串联电阻的特高压变压器空载直流偏磁计算[J].电工技术学报,2017,32(8):129-137,9.基金项目
国家重点研发计划项目(2016YFC0800103),国家自然科学基金(51577060)和中央高校基本科研业务费专项资金(JB2014177)资助项目. （2016YFC0800103）
