摘要
为了给高耐电性能GIS/GIL盆式绝缘子的研制提供理论支持及设计导则,采用数值模拟方法对550kV交流盆式绝缘子模型开展电场分布的多层次综合优化设计。在初步设计阶段,首先通过几何形状的轮廓优化获得盆体凹面和凸面的轮廓外形,在此基础上进一步通过介电分布的拓扑优化,调整绝缘内部的相对介电常数空间分布以实现沿面电场的调控,实现了绝缘结构整体的优化设计。在详细设计阶段,基于几何形状和介电分布拓扑优化的结果,通过参数优化寻找最优的介电常数以及连接件高度等局部关键结构最优尺寸参数。仿真结果表明,提出的多层次综合优化策略能够最大程度地利用设计空间,实现几何形状与介电分布"1+1>2"的优化效果。相较于优化前的原始盆式绝缘子,优化后的盆体凸面和凹面的最大电场降幅可分别达24.2%和28.6%,大幅改善了盆式绝缘子的整体电场分布。
To give theoretical support and guideline for the fabrication of spacer with good electrical strength, a comprehensive multi-level design strategy based on the optimization of electric field(E field) distribution was proposed. Numerical simulation was conducted on a 550 kV AC spacer model. On the preliminary design stage, an overall profile of convex and concave of the spacer was gained through shape optimization. Thereafter, topology optimization was applied to the optimized structure to achieve proper permittivity spatial distribution, which could further relieve electrical stress by the proactive regulation of E field. On the basis of the overall optimized results gained by shape and topology optimization, parameter optimization was carried out on the detailed design stage to achieve the optimal permittivity value and the best geometrical parameters of some key parts like the length of metal insert. Simulation results indicate that the proposed comprehensive optimization strategy could make full use of design space, realizing a "1+1>2" effect by combining the optimization of structure and dielectric distribution. The maximum E field of the convex and concave of optimal insulator could be decreased by 24.2% and 28.6% comparing with original structure, and the overall surface electric field distribution is remarkably improved.
作者
王超
李文栋
杨雄
江智慧
谌明禹
薛建议
张冠军
WANG Chao;LI Wendong;YANG Xiong;JIANG Zhihui;SHEN Mingyu;XUE Jianyi;ZHANG Guanjun(State Key Laboratory of Electrical Insulation and Power Equipment(Xi’an Jiaotong University),Xi’an 710049,Shaanxi Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2020年第22期7166-7174,共9页
Proceedings of the CSEE
基金
国家自然科学基金项目(U1766218,11775175,51827809)。
关键词
结构优化
介电分布优化
盆式绝缘子
电场调控
功能梯度材料
structure optimization
dielectric distribution optimization
spacer
E field regulation
functionally graded material
