Optimization method for geometric shape of DC GIL insulators based on electric thermal multi-physics field coupling model

IF 1.6 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC Electrical Engineering Pub Date : 2024-09-12 DOI:10.1007/s00202-024-02680-6
Qianqiu Shao
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Abstract

The excessive electric field on the surface of DC gas-insulated metal-enclosed transmission lines (GIL) basin insulators is one of the main factors leading to insulation failure. In this paper, we parameterized and reconstructed the shape of the insulator based on the Bernstein polynomial under the Bessel curve and established an optimization model for the geometric shape of 500 kV DC GIL insulators considering the surface charge accumulated on the insulator under temperature gradient. We obtained the optimal parameters of the contour function of the basin insulator surface using the Levenberg–Marquardt optimization algorithm and explored the optimization effect of insulators by the insulation tests. The results show that the optimized basin insulator has a maximum electrical strength of 4.39 kV/mm along the insulator surface, and the flashover voltage of the optimized insulator is 15.37% higher than that of the original structure, laying a foundation for the production of a new type of high-electrical performance basin insulator.

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基于电热多物理场耦合模型的直流 GIL 绝缘子几何形状优化方法
直流气体绝缘金属封闭输电线路(GIL)盆式绝缘子表面过大的电场是导致绝缘失效的主要因素之一。本文基于贝塞尔曲线下的伯恩斯坦多项式对绝缘子的形状进行了参数化和重构,并建立了考虑温度梯度下绝缘子表面电荷累积的 500 kV 直流 GIL 绝缘子几何形状优化模型。利用 Levenberg-Marquardt 优化算法获得了盆式绝缘子表面轮廓函数的最优参数,并通过绝缘试验探索了绝缘子的优化效果。结果表明,优化后的盆式绝缘子沿绝缘子表面的最大电气强度为 4.39 kV/mm,优化后绝缘子的闪络电压比原结构提高了 15.37%,为生产新型高电气性能盆式绝缘子奠定了基础。
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来源期刊
Electrical Engineering
Electrical Engineering 工程技术-工程:电子与电气
CiteScore
3.60
自引率
16.70%
发文量
0
审稿时长
>12 weeks
期刊介绍: The journal “Electrical Engineering” following the long tradition of Archiv für Elektrotechnik publishes original papers of archival value in electrical engineering with a strong focus on electric power systems, smart grid approaches to power transmission and distribution, power system planning, operation and control, electricity markets, renewable power generation, microgrids, power electronics, electrical machines and drives, electric vehicles, railway electrification systems and electric transportation infrastructures, energy storage in electric power systems and vehicles, high voltage engineering, electromagnetic transients in power networks, lightning protection, electrical safety, electrical insulation systems, apparatus, devices, and components. Manuscripts describing theoretical, computer application and experimental research results are welcomed. Electrical Engineering - Archiv für Elektrotechnik is published in agreement with Verband der Elektrotechnik Elektronik Informationstechnik eV (VDE).
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