摘要
针对安装均压环可以提高分压器的测量精度,但其尺寸和安装位置的不同会直接影响电场畸变效果的问题,搭建了500 kV直流电阻标准分压器有限元模型,并基于迭代正交实验法分析不同尺寸和安装位置的均压环对直流电阻标准分压器周围电场分布的影响.计算出均压环圆心到地面的距离、内环半径、圆心到对称轴的距离等最优尺寸与最佳安装位置.结果表明,迭代算法使分压器周围的最大电场强度从4212.5 V/mm降低到820.719 V/mm.
Aiming at the problem of electric field distortion directly affected by the different sizes and installation positions of grading ring even that its installation can improve the measurement accuracy of voltage divider,a finite element model for 500 kV standard voltage divider with DC resistance was established.According to an iterative-orthogonal test method,the influence of grading ring with different sizes and installation positions on electric field distribution around standard voltage divider with DC resistance was analyzed.The optimal size and installation position,e.g.the distance from center of grading ring to ground,the radius of inner ring and the distance from circle center to symmetry axis,etc.,were calculated.The results show that the maximum electric field strength around voltage divider obtained by the iterative algorithm reduces from 4212.5 V/mm to 820.719 V/mm.
作者
高帅
赵林
徐占河
袁瑞铭
周丽霞
GAO Shuai;ZHAO Lin;XU Zhan-he;YUAN Rui-ming;ZHOU Li-xia(Electric Power Research Institute,State Grid Jibei Electric Power Co.Ltd.,Beijing 100045,China;Electrical Measurement Technology Institute,North China Electric Power Research Institute,Beijing 100045,China)
出处
《沈阳工业大学学报》
EI
CAS
北大核心
2020年第1期23-28,共6页
Journal of Shenyang University of Technology
基金
国网冀北电力有限公司科技项目(52018K17000A)
关键词
500
kV直流电阻
直流标准分压器
有限元模型
电场分布
均压环
最优尺寸
安装位置
迭代正交实验法
500 kV DC resistance
DC standard voltage divider
finite element model
electric field distribution
grading ring
optimal size
installation position
iterative-orthogonal test method
