{"id":13639,"date":"2025-04-14T14:24:30","date_gmt":"2025-04-14T14:24:30","guid":{"rendered":"https:\/\/gridenergy.ma\/?p=13639"},"modified":"2025-04-17T14:53:13","modified_gmt":"2025-04-17T14:53:13","slug":"partial-discharge","status":"publish","type":"post","link":"https:\/\/gridenergy.ma\/en\/partial-discharge\/","title":{"rendered":"Partial discharge"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"13639\" class=\"elementor elementor-13639\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-63728a28 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"63728a28\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-65e505b6\" data-id=\"65e505b6\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-29aece2 elementor-widget elementor-widget-text-editor\" data-id=\"29aece2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ol><li style=\"font-weight: 400;\"><strong>What is partial discharge?<\/strong><\/li><\/ol><p>Partial discharge (PD) refers to a localized electrical discharge in an insulator or at the interface between two conductive materials, where the electric field exceeds the local insulation capacity without causing a complete short circuit. Although partial discharge is not an immediate and catastrophic event, it leads to a gradual degradation of the insulation, threatening the long-term reliability of electrical equipment, particularly in high-voltage systems such as transformers, cables, and motors.<\/p><p>Partial discharge is often an indicator of impending failure, making it a crucial element to monitor to avoid unexpected outages. Early detection is therefore essential to enable preventative maintenance and ensure the proper functioning of electrical installations.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-22ec99b elementor-widget elementor-widget-text-editor\" data-id=\"22ec99b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ol start=\"2\"><li><strong> How does a partial discharge occur?<\/strong><\/li><\/ol><p>Partial discharges occur in areas where the local electric field exceeds the dielectric strength of the insulating material. This phenomenon typically occurs in high-voltage electrical systems, such as transformers, motors, or cables, when insulation defects (e.g., the presence of gases, liquids, or solids in the insulating material) or aging anomalies affect the insulation's capabilities.<\/p><p>The main causes of partial discharges are:<\/p><ul><li class=\"translation-block\"><strong>Inclusions of gases or liquids<\/strong> in the insulation, reducing the dielectric strength and allowing the occurrence of discharges.<\/li><li class=\"translation-block\"><strong>Manufacturing defects<\/strong>, such as imperfections in insulation materials or areas of structural weakness.<\/li><li class=\"translation-block\"><strong>Aging of insulating materials<\/strong> due to exposure to thermal cycles, humidity, or electrical radiation, which weaken the insulation over time.<\/li><li class=\"translation-block\"><strong>Environmental conditions<\/strong> such as extreme temperatures, high humidity or overload conditions that promote insulation degradation.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-564dcf9 elementor-widget elementor-widget-text-editor\" data-id=\"564dcf9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"row mt-n4 mb-4 wow fadeIn\" data-wow-delay=\"100ms\"><div class=\"col-md-4 mt-4\"><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-medium wp-image-13778\" src=\"https:\/\/gridenergy.ma\/wp-content\/uploads\/2025\/04\/Decharge-partielle3-300x229.png\" alt=\"\" width=\"300\" height=\"229\" srcset=\"https:\/\/gridenergy.ma\/wp-content\/uploads\/2025\/04\/Decharge-partielle3-300x229.png 300w, https:\/\/gridenergy.ma\/wp-content\/uploads\/2025\/04\/Decharge-partielle3.png 551w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div><div class=\"col-md-4 mt-4\"><img decoding=\"async\" class=\"alignnone size-medium wp-image-13775\" src=\"https:\/\/gridenergy.ma\/wp-content\/uploads\/2025\/04\/Decharge-partielle1-300x229.png\" alt=\"D\u00e9charge-partielle1\" width=\"300\" height=\"229\" srcset=\"https:\/\/gridenergy.ma\/wp-content\/uploads\/2025\/04\/Decharge-partielle1-300x229.png 300w, https:\/\/gridenergy.ma\/wp-content\/uploads\/2025\/04\/Decharge-partielle1.png 551w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div><div class=\"col-md-4 mt-4\"><img decoding=\"async\" class=\"alignnone size-medium wp-image-13776\" src=\"https:\/\/gridenergy.ma\/wp-content\/uploads\/2025\/04\/Decharge-partielle2-300x229.png\" alt=\"D\u00e9charge-partielle2\" width=\"300\" height=\"229\" srcset=\"https:\/\/gridenergy.ma\/wp-content\/uploads\/2025\/04\/Decharge-partielle2-300x229.png 300w, https:\/\/gridenergy.ma\/wp-content\/uploads\/2025\/04\/Decharge-partielle2.png 551w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-10123fd mb-0 elementor-widget elementor-widget-text-editor\" data-id=\"10123fd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ol start=\"3\"><li><strong> The consequences of partial discharges on electrical equipment<\/strong><\/li><\/ol><p>Partial discharges, although localized, have a major impact on electrical equipment. The main consequences include:<\/p><ul><li class=\"translation-block\"><strong>Thermal and chemical deterioration of insulation<\/strong>: Discharges generate localized heat points, causing thermal degradation of insulation materials. This degradation, combined with chemical reactions, gradually weakens the insulation, making the equipment vulnerable to failure.<\/li><li class=\"translation-block\"><strong>Reduced equipment lifespan<\/strong>: The cumulative effect of partial discharges leads to progressive degradation, thus reducing the lifespan of electrical equipment.<\/li><li class=\"translation-block\"><strong>Risk of short circuit or fire<\/strong>: An undetected partial discharge can develop into a total short circuit, or even cause a fire in sensitive installations.<\/li><li class=\"translation-block\"><strong>Loss of performance and risk of breakdown<\/strong>: Discharges create disruptions in the normal operation of electrical equipment, reducing its efficiency and reliability.<\/li><\/ul><ol start=\"4\"><li><strong> How to detect partial discharges?<\/strong><\/li><\/ol><p>Partial discharge detection is a key aspect of managing the reliability of electrical systems. Several technologies can be used to measure and locate these discharges:<\/p><ul><li class=\"translation-block\"><strong>Acoustic analysis (ultrasound)<\/strong>: Partial discharges generate specific high-frequency ultrasonic waves. The use of ultrasonic sensors makes it possible to locate these discharges and assess their severity.<\/li><li class=\"translation-block\"><strong>Measurement of electromagnetic emissions<\/strong>: Partial discharges emit electromagnetic pulses that can be detected using specialized high-frequency sensors. These measurements allow for precise location of discharge points.<\/li><li class=\"translation-block\"><strong>Dissolved Gas Analysis (DGA)<\/strong>: Detecting dissolved gases in transformers can help identify the effects of partial discharge. Gases such as hydrogen and methane are generated by the degradation of the insulation.<\/li><li class=\"translation-block\"><strong>Measurement of partial leakage currents<\/strong>: Some equipment can measure leakage currents associated with a partial discharge, providing a direct indicator of insulation failure.<\/li><\/ul><ol start=\"5\"><li><strong> Solutions to limit or eliminate partial discharges<\/strong><\/li><\/ol><p><strong>Monitoring and analysis solutions with OMICRON equipment<\/strong><\/p><p>OMICRON's solutions for partial discharge detection and analysis are among the most advanced in the field of high-voltage electrical equipment testing. These devices enable accurate assessment and proactive management of partial discharge risks.<\/p><ol><li><strong> Partial discharge test with the PD Analyzer system (OMICRON)<\/strong><\/li><\/ol><p class=\"translation-block\">OMICRON's <strong>PD Analyzer<\/strong> is a comprehensive, mobile solution for measuring and analyzing partial discharges in electrical systems. It detects, locates, and analyzes partial discharges in transformers, cables, and other electrical equipment. Its approach allows for real-time measurement of discharge emissions and in-depth analysis of received signals, enabling the severity of discharges to be determined and their potential impact on equipment to be estimated.<\/p><ol start=\"2\"><li><strong> Polarization test and leakage current measurement with the CPC 100 (OMICRON)<\/strong><\/li><\/ol><p class=\"translation-block\">The <strong>CPC 100<\/strong> is another OMICRON device that can measure partial leakage currents and perform polarization tests on insulation. Its high-precision testing capabilities allow insulation quality to be determined by measuring its ability to withstand discharges. This test is essential for predictive maintenance of electrical equipment.<\/p><ol start=\"3\"><li><strong> Use of the continuous partial discharge monitoring system (OMICRON)<\/strong><\/li><\/ol><p>OMICRON's online monitoring solutions enable real-time detection of equipment anomalies, including partial discharges. These systems provide continuous monitoring, with instant alerts as soon as a partial discharge is detected. With these tools, companies can take preventive measures quickly and avoid costly failures.<\/p><ol start=\"4\"><li><strong> Dissolved gas analysis with the OMICRON device (DGA)<\/strong><\/li><\/ol><p>OMICRON's DGA devices measure the concentration of dissolved gases in transformer oils. These gases are a valuable indicator of insulation degradation and partial discharges. Analyzing these gases helps proactively identify failure risks before they become critical.<\/p><p><strong>Other preventive measures to limit partial discharges<\/strong><\/p><ul><li class=\"translation-block\"><strong>Improved insulation materials<\/strong>: The use of insulating materials with high dielectric and thermal properties, such as reinforced composites, reduces the risk of partial discharges.<\/li><li class=\"translation-block\"><strong>Predictive Maintenance<\/strong>: Implementing preventive maintenance programs using advanced monitoring technologies allows early detection of signs of insulation degradation.<\/li><li class=\"translation-block\"><strong>Reducing humidity and pollution<\/strong>: Maintaining a controlled environment with low humidity and an absence of contaminants is essential to limit the risk of partial discharges.<\/li><\/ul><ol start=\"6\"><li><strong> Conclusion: The importance of prevention and maintenance in electrical installations<\/strong><\/li><\/ol><p>Partial discharges pose a real risk to the reliability of high-voltage electrical equipment. However, thanks to advanced detection and analysis solutions offered by companies like OMICRON, it is possible to detect and locate these discharges before they cause significant damage.<\/p><p class=\"translation-block\">A proactive approach, combined with preventative maintenance and the use of online monitoring tools, is essential to maintain the performance and safety of electrical installations. At <strong>Grid Energy Company<\/strong>, we offer quality maintenance and monitoring services to ensure the longevity of your electrical equipment, while using the latest technologies to detect and prevent risks associated with partial discharges.<\/p><ol start=\"7\"><li><strong> Why call on an expert for your electrical protection needs?<\/strong><\/li><\/ol><p>Grid Energy Company offers specialized services for monitoring, maintenance, and partial discharge detection in your facilities. We work with cutting-edge solutions, such as those offered by OMICRON, to ensure the safety and performance of your electrical equipment. Contact us to learn more about our services and solutions tailored to your specific needs.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Qu\u2019est-ce que la d\u00e9charge partielle ? La d\u00e9charge partielle (DP) d\u00e9signe une d\u00e9charge \u00e9lectrique localis\u00e9e dans un isolant ou \u00e0 l\u2019interface entre deux mat\u00e9riaux conducteurs, o\u00f9 le champ \u00e9lectrique exc\u00e8de la capacit\u00e9 d\u2019isolement local sans provoquer un court-circuit complet. Bien que la d\u00e9charge partielle ne soit pas un \u00e9v\u00e9nement imm\u00e9diat et catastrophique, elle entra\u00eene une [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":13640,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22],"tags":[24],"class_list":["post-13639","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-le-saviez-vous-et-tutoriels-2","tag-le-saviez-vous-et-tutoriels"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>D\u00e9charge partielle - Grid Energy Company<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/gridenergy.ma\/en\/partial-discharge\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"D\u00e9charge partielle - Grid Energy Company\" \/>\n<meta property=\"og:description\" content=\"Qu\u2019est-ce que la d\u00e9charge partielle ? La d\u00e9charge partielle (DP) d\u00e9signe une d\u00e9charge \u00e9lectrique localis\u00e9e dans un isolant ou \u00e0 l\u2019interface entre deux mat\u00e9riaux conducteurs, o\u00f9 le champ \u00e9lectrique exc\u00e8de la capacit\u00e9 d\u2019isolement local sans provoquer un court-circuit complet. 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