高电压技术2012，Vol.38Issue(2)：368-375,8.
特高压工频无局放试验变压器外电场模拟计算分析及试验布置优化
Electric Field Simulate Calculation and Experimental Layout Optimization of Ultra High Voltage Power Frequency Test Transformer Without Partial Discharge
摘要
Abstract
Multi-stage series connection frequency test transformer without partial discharge is very important for design and experiment of ultra high voltage（UHV） equipment.We developed a finite element method（FEM） to analyze the electric field of the space with a typical series test transformer,respectively discussed the characteristics of electric field distribution for the cases that the transformer locates in ideal outdoor,10 m and 7 m away from the wall indoors,and analyzed its law of maximum field strength changing with the clearance distance.Moreover,we investigated the effect of the transformer itself structure on the maximum field strength,and calculated and compared the field distributions under some specific modeling conditions for three different types of top shielding.Simulation results demonstrate the shielding effect of dual-ring type is prior to single sphere type with the equal radiuses of ring and sphere,and the maximum value of electric field strength decreases with increase in radius of shield ring section.Combining with the space electric field distribution,a law of corona discharge caused by other auxiliary equipments and space stray items can be obtained that discharge will not happen when ground rod is more than 10 m away from the transformer and the effect on space field distribution decreases with smaller light size in the model,when the radius of light was longer than 10 cm,partial discharge will happen.Finally the layout of test transformer is optimized.关键词
特高压（UHV）/工频试验变压器/有限元法（FEM）模型/场强分布/局部放电/优化布置Key words
ultra high voltage（UHV）/power frequency test transformer/finite element method（FEM） model/electric field distribution/partial discharge/layout optimization分类
信息技术与安全科学引用本文复制引用
颜楠楠,傅正财,王国利,陈坚,孙伟..特高压工频无局放试验变压器外电场模拟计算分析及试验布置优化[J].高电压技术,2012,38(2):368-375,8.基金项目
特高压工程技术（昆明、广州）国家工程实验室开放基金 （）
上海交通大学研究生创新能力培养专项基金（编号略）~~ （）
