Research on impulse property of pin-type grounding device in mountainous area based on thin-shell theory

Research on impulse property of pin-type grounding device in mountainous area based on thin-shell theory | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Research on impulse property of pin-type grounding device in mountainous area based on thin-shell theory Jingli Li, Mengyao Zhang, Xian Cheng, Guangyin Wu, Zeyu Zhang, and 2 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6418561/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Reduction of impulse resistance for grounding systems in mountainous soil structures is the basic work to improve the lightning resistance of transmission lines. In this paper, firstly, the spatial finite element and time-domain finite difference method are combined to calculate the impulse property of the tower grounding system, in order to simulate the time-varying and spatial distribution of the soil resistivity in the process of lightning current discharge, the soil resistivity is set as a function of the spatial electric field strength. Then the large size difference between the cross-section of the grounding conductor and the soil discharged area will lead to division difficulty and calculation surge, so thin-layer grounding conductor is equivalent to a two-dimensional plane with a certain virtual thickness. Finally, the influence of pin-type grounding devices geometry on impulse properties was analyzed. The results showed that soil structures (hillside slopes and vegetation layer thicknesses) will influence optimal pinning geometry. The pin length achieves its optimal value when maximized provided that it remains within the vegetation layer thickness. Under different hillside slopes, the optimal pinning spacing is 1.5 times the length, and the optimal pinning angle increases with the slope. Under different vegetation layer thicknesses, the optimal pinning spacing is 1.5~2.0 times the length, and the optimal pinning angle of pin-type grounding device in hillside and ridge is about 60° and 75° respectively when the vegetation layer thicknesses are 4, 5, and 6 m. Impulse Grounding Resistance Finite Element Model (FEM) Thin-Shell Theory Pin-Type Stratified Soil in Mountainous Areas Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-6418561","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":466902843,"identity":"2c8ffd70-aafc-4a26-a723-623c77550f1c","order_by":0,"name":"Jingli Li","email":"","orcid":"","institution":"School of Electrical and Information Engineering, Zhengzhou University","correspondingAuthor":false,"prefix":"","firstName":"Jingli","middleName":"","lastName":"Li","suffix":""},{"id":466902845,"identity":"8338330e-b7d2-4d63-976c-49dea215712d","order_by":1,"name":"Mengyao Zhang","email":"","orcid":"","institution":"School of Electrical and 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In this paper, firstly, the spatial finite element and time-domain finite difference method are combined to calculate the impulse property of the tower grounding system, in order to simulate the time-varying and spatial distribution of the soil resistivity in the process of lightning current discharge, the soil resistivity is set as a function of the spatial electric field strength. Then the large size difference between the cross-section of the grounding conductor and the soil discharged area will lead to division difficulty and calculation surge, so thin-layer grounding conductor is equivalent to a two-dimensional plane with a certain virtual thickness. Finally, the influence of pin-type grounding devices geometry on impulse properties was analyzed. The results showed that soil structures (hillside slopes and vegetation layer thicknesses) will influence optimal pinning geometry. The pin length achieves its optimal value when maximized provided that it remains within the vegetation layer thickness. Under different hillside slopes, the optimal pinning spacing is 1.5 times the length, and the optimal pinning angle increases with the slope. Under different vegetation layer thicknesses, the optimal pinning spacing is 1.5~2.0 times the length, and the optimal pinning angle of pin-type grounding device in hillside and ridge is about 60° and 75° respectively when the vegetation layer thicknesses are 4, 5, and 6 m.","manuscriptTitle":"Research on impulse property of pin-type grounding device in mountainous area based on thin-shell theory","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-06-06 04:50:24","doi":"10.21203/rs.3.rs-6418561/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"5ea7cc01-8cfd-4c57-a2c1-07369539dda1","owner":[],"postedDate":"June 6th, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[],"tags":[],"updatedAt":"2025-06-18T01:38:27+00:00","versionOfRecord":[],"versionCreatedAt":"2025-06-06 04:50:24","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-6418561","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-6418561","identity":"rs-6418561","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}