摘要
建立了悬挂于金属塔上计及高压母线效应时的金属氧化物避雷器三维静电场模型,利用有限元数值方法计算了这一静电场分布。定义了避雷器阀片电压偏差,提出了以阀片电压偏差最小化为目标的避雷器设计方法。研究了均压环的不同组合、均压环小环径和阀片的介电常数对阀片电压最大偏差的影响。利用最小二乘法和分离变量法拟合了目标函数与均压环直径、悬挂高度的关系,为避雷器的结构优化奠定了理论基础,也为其他电力设备的优化提供了一条途径。
3D electrostatic model for surge arresters suspended under metal tower considering bus effect is proposed in this paper, and the electric field is solved with finite element method (FEM). A concept of voltage warp (VW) for varistors is defined, and a designing arrester method is put forward to whose object is VW minimizing. It was studied that some factors affecting the max VW that include different assembled grading rings, small radius of grading ring, and relative permittivity. The relationship between object function and diameter, suspended height of grading ring were simulated with least square and separated variable method. It is the theoretical base of designing surge arrester; further more provides an approach to design other power apparatus.
出处
《电工技术学报》
EI
CSCD
北大核心
2005年第6期30-34,共5页
Transactions of China Electrotechnical Society
基金
国家电力公司"西北750kV输变电工程攻关项目"
关键词
避雷器
静电场
有限元
电压偏差
Surge arrester,electrostatic,finite element method (FEM),voltage warp (VW)
