电工技术学报2017，Vol.32Issue(20)：53-61,9.DOI:10.19595/j.cnki.1000-6753.tces.170140
油纸绝缘内部合成电场数值模拟方法
Numerical Simulation Method of Electric Field in Oil-Paper Insulation
摘要
Abstract
The oil-paper insulation as the main insulating medium of the converter transformer, its distribution of electric field is influenced by applied voltage and space charge. The traditional numerical methods fail to figure up the influence of space charge accurately. In this paper, a method based on Schottky emission theory and transient upstream finite element method (TUFEM) was proposed to solve the carrier transport equations. The simulation of charge motion characteristics in single oil-paper insulation was carried out considering electrode implantation barrier, carrier mobility, trap coefficient and carrier recombination coefficient. Compared with the test results, the simulation results indicate this method has high accuracy. The effects of temperature gradient on the electric field intensity distortion in oil-paper insulation were studied. Moreover, the charge movement and electric distribution at different time moments under the polarity reversal voltage were calculated. This method can be applied to the calculation and optimization design of the insulation electric field in the high voltage DC converter transformer.关键词
油纸绝缘/空间电荷/瞬态上流元法/温度梯度/极性反转Key words
Oil-paper insulation/space charge/transient upstream finite element method/temperature gradient/polarity reversal分类
信息技术与安全科学引用本文复制引用
连启祥,杜志叶,杨知非,金硕,阮江军..油纸绝缘内部合成电场数值模拟方法[J].电工技术学报,2017,32(20):53-61,9.基金项目
国家自然科学基金(51477120、51741708)和特高压工程技术(昆明、广州)国家工程实验室开放基金(CSGTRC[2015]Q1543B14)资助项目. （51477120、51741708）
