Internal Defect Monitoring System Design for Aluminum Conductor Composite Cores Using a Magnetic-Coating Interlayer in Power Transmission Lines

Internal Defect Monitoring System Design for Aluminum Conductor Composite Cores Using a Magnetic-Coating Interlayer in Power Transmission Lines | 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 Internal Defect Monitoring System Design for Aluminum Conductor Composite Cores Using a Magnetic-Coating Interlayer in Power Transmission Lines Young-Dae Shim, Changhyeon Kim, Jihun Kim, Eun-Ho Lee This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9123365/v1 This work is licensed under a CC BY 4.0 License Status: Under Revision Version 1 posted 9 You are reading this latest preprint version Abstract As power grids demand higher capacity and efficiency, aluminum conductor composite core (ACCC) cables have become increasingly important. However, the reliability of these conductors depends on the structural integrity of their internal composite cores, where hidden defects are difficult to detect due to electromagnetic shielding by surrounding aluminum conductors. This paper proposes a magnetic coating interlayer integrated into the composite core to enable electromagnetic detection of internal defects. The coating enhances the magnetic permeability of the core, improving sensitivity to defect-induced field variations measured by an external sensor. The sensor configuration was optimized through electromagnetic analysis to maximize detection capability. The magnetic coating, composed of epoxy resin and magnetic particles, was further optimized by evaluating signal-to-noise ratio (SNR) and adhesion strength. Numerical simulations, cross-cut adhesion tests, and Pareto analysis were conducted to identify the optimal balance between sensitivity and durability. Experimental validation using a coated composite core embedded in an aluminum pipe confirmed the effectiveness of the proposed method. This technique provides a practical solution for both pre-installation and in-service defect monitoring of ACCC composite cores. Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Revision Version 1 posted Editorial decision: Revision requested 05 May, 2026 Reviews received at journal 15 Apr, 2026 Reviews received at journal 02 Apr, 2026 Reviewers agreed at journal 25 Mar, 2026 Reviewers agreed at journal 24 Mar, 2026 Reviewers invited by journal 23 Mar, 2026 Editor assigned by journal 23 Mar, 2026 Submission checks completed at journal 23 Mar, 2026 First submitted to journal 14 Mar, 2026 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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