{"title":"Optimization method for geometric shape of DC GIL insulators based on electric thermal multi-physics field coupling model","authors":"Qianqiu Shao","doi":"10.1007/s00202-024-02680-6","DOIUrl":null,"url":null,"abstract":"<p>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.</p>","PeriodicalId":50546,"journal":{"name":"Electrical Engineering","volume":"60 1","pages":""},"PeriodicalIF":1.6000,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electrical Engineering","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1007/s00202-024-02680-6","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
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.
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).