{"id":1594,"date":"2019-09-03T12:27:14","date_gmt":"2019-09-03T12:27:14","guid":{"rendered":"https:\/\/www.sediver.com\/case_studies\/upgrading-an-old-500-kv-dc-line\/"},"modified":"2019-10-09T09:52:13","modified_gmt":"2019-10-09T09:52:13","slug":"rehabilitation-dune-ancienne-ligne-500-kv-dc","status":"publish","type":"case_studies","link":"https:\/\/www.sediver.com\/fr\/etudes-de-cas\/rehabilitation-dune-ancienne-ligne-500-kv-dc\/","title":{"rendered":"R\u00e9habilitation d&rsquo;une ancienne ligne 500 kV DC"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\"> Le d\u00e9fi client  <\/h2>\n\n\n\n<p>Une ancienne ligne courant continu, d\u00e9j\u00e0 r\u00e9nov\u00e9e \u00e0 deux reprises, devait \u00eatre mise \u00e0 niveau \u00e0 une tension plus \u00e9lev\u00e9e, et ce en conservant les structures existantes et la longueur des cha\u00eenes d&rsquo;origine.  <\/p>\n\n\n\n<h2 class=\"wp-block-heading\">La contribution de Sediver  <\/h2>\n\n\n\n<p>Sur une p\u00e9riode de 10 ans, les cha\u00eenes d&rsquo;origine en porcelaine ont \u00e9t\u00e9 test\u00e9es et \u00e9valu\u00e9es afin d&rsquo;identifier d&rsquo;\u00e9ventuelles faiblesses, tandis que diverses \u00e9tudes de pollution \u00e9taient r\u00e9alis\u00e9es sur le site et dans le laboratoire de pollution DC de Sediver. L&rsquo;analyse des isolateurs existants a clairement montr\u00e9 une situation de fin de vie. Les isolateurs ne pouvaient donc pas \u00eatre r\u00e9utilis\u00e9s, car le stress \u00e9lectrique aurait entra\u00een\u00e9 de nombreuses perforations tout au long de la ligne. De nouveaux isolateurs ont \u00e9t\u00e9 sugg\u00e9r\u00e9s avec une plus grande ligne de fuite, tout en conservant la conception globale de la ligne inchang\u00e9e. La remise \u00e0 neuf et la modernisation de la ligne ont \u00e9t\u00e9 entreprises conform\u00e9ment aux recommandations de Sediver. <\/p>\n","protected":false},"featured_media":2933,"template":"","class_list":["post-1594","case_studies","type-case_studies","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>R\u00e9habilitation d&#039;une ancienne ligne 500 kV DC - Sediver<\/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:\/\/www.sediver.com\/fr\/etudes-de-cas\/rehabilitation-dune-ancienne-ligne-500-kv-dc\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"R\u00e9habilitation d&#039;une ancienne ligne 500 kV DC - Sediver\" \/>\n<meta property=\"og:description\" content=\"Le d\u00e9fi client Une ancienne ligne courant continu, d\u00e9j\u00e0 r\u00e9nov\u00e9e \u00e0 deux reprises, devait \u00eatre mise \u00e0 niveau \u00e0 une tension plus \u00e9lev\u00e9e, et ce en conservant les structures existantes et la longueur des cha\u00eenes d&rsquo;origine. La contribution de Sediver Sur une p\u00e9riode de 10 ans, les cha\u00eenes d&rsquo;origine en porcelaine ont \u00e9t\u00e9 test\u00e9es et [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.sediver.com\/fr\/etudes-de-cas\/rehabilitation-dune-ancienne-ligne-500-kv-dc\/\" \/>\n<meta property=\"og:site_name\" content=\"Sediver\" \/>\n<meta property=\"article:modified_time\" content=\"2019-10-09T09:52:13+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.sediver.com\/wp-content\/uploads\/UpgradingOld500kVline.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1250\" \/>\n\t<meta property=\"og:image:height\" content=\"600\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.sediver.com\\\/fr\\\/etudes-de-cas\\\/rehabilitation-dune-ancienne-ligne-500-kv-dc\\\/\",\"url\":\"https:\\\/\\\/www.sediver.com\\\/fr\\\/etudes-de-cas\\\/rehabilitation-dune-ancienne-ligne-500-kv-dc\\\/\",\"name\":\"R\u00e9habilitation d'une ancienne ligne 500 kV DC - Sediver\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.sediver.com\\\/fr\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.sediver.com\\\/fr\\\/etudes-de-cas\\\/rehabilitation-dune-ancienne-ligne-500-kv-dc\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.sediver.com\\\/fr\\\/etudes-de-cas\\\/rehabilitation-dune-ancienne-ligne-500-kv-dc\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.sediver.com\\\/wp-content\\\/uploads\\\/UpgradingOld500kVline.jpg\",\"datePublished\":\"2019-09-03T12:27:14+00:00\",\"dateModified\":\"2019-10-09T09:52:13+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.sediver.com\\\/fr\\\/etudes-de-cas\\\/rehabilitation-dune-ancienne-ligne-500-kv-dc\\\/#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.sediver.com\\\/fr\\\/etudes-de-cas\\\/rehabilitation-dune-ancienne-ligne-500-kv-dc\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\\\/\\\/www.sediver.com\\\/fr\\\/etudes-de-cas\\\/rehabilitation-dune-ancienne-ligne-500-kv-dc\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.sediver.com\\\/wp-content\\\/uploads\\\/UpgradingOld500kVline.jpg\",\"contentUrl\":\"https:\\\/\\\/www.sediver.com\\\/wp-content\\\/uploads\\\/UpgradingOld500kVline.jpg\",\"width\":1250,\"height\":600},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.sediver.com\\\/fr\\\/etudes-de-cas\\\/rehabilitation-dune-ancienne-ligne-500-kv-dc\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Accueil\",\"item\":\"https:\\\/\\\/www.sediver.com\\\/fr\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"R\u00e9habilitation d&rsquo;une ancienne ligne 500 kV DC\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.sediver.com\\\/fr\\\/#website\",\"url\":\"https:\\\/\\\/www.sediver.com\\\/fr\\\/\",\"name\":\"Sediver\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.sediver.com\\\/fr\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"fr-FR\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"R\u00e9habilitation d'une ancienne ligne 500 kV DC - Sediver","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.sediver.com\/fr\/etudes-de-cas\/rehabilitation-dune-ancienne-ligne-500-kv-dc\/","og_locale":"fr_FR","og_type":"article","og_title":"R\u00e9habilitation d'une ancienne ligne 500 kV DC - Sediver","og_description":"Le d\u00e9fi client Une ancienne ligne courant continu, d\u00e9j\u00e0 r\u00e9nov\u00e9e \u00e0 deux reprises, devait \u00eatre mise \u00e0 niveau \u00e0 une tension plus \u00e9lev\u00e9e, et ce en conservant les structures existantes et la longueur des cha\u00eenes d&rsquo;origine. 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