{"id":3859,"date":"2019-05-06T17:20:34","date_gmt":"2019-05-06T15:20:34","guid":{"rendered":"https:\/\/www.orteanext.com\/non-classifiee\/voltage-sag-the-most-significant-of-all-power-quality-issues\/"},"modified":"2025-06-20T12:10:41","modified_gmt":"2025-06-20T10:10:41","slug":"creux-de-tension-le-plus-important-de-tous-les-problemes-de-qualite-de-lenergie","status":"publish","type":"post","link":"https:\/\/www.orteanext.com\/fr\/qualite-de-l-energie\/creux-de-tension-le-plus-important-de-tous-les-problemes-de-qualite-de-lenergie\/","title":{"rendered":"CREUX DE TENSION: LE PLUS IMPORTANT DE TOUS LES PROBL\u00c8MES DE QUALIT\u00c9 DE L&rsquo;\u00c9NERGIE"},"content":{"rendered":"<p>L&rsquo;industrie moderne est de plus en plus automatis\u00e9e et la sensibilit\u00e9 des processus aux \u00e9v\u00e9nements li\u00e9s \u00e0 la qualit\u00e9 de l&rsquo;\u00e9nergie augmente.<\/p>\n<p>Il est g\u00e9n\u00e9ralement admis que la qualit\u00e9 est un aspect important du service d&rsquo;\u00e9lectricit\u00e9. Il n&rsquo;y a pas que les prix bas qui comptent, la qualit\u00e9 est \u00e9galement importante pour les clients. Le prix et la qualit\u00e9 sont souvent des aspects compl\u00e9mentaires ; ensemble, ils d\u00e9finissent la valeur que les clients retirent de la consommation d&rsquo;\u00e9lectricit\u00e9.<\/p>\n<p>Les entreprises sont de plus en plus sensibles aux probl\u00e8mes de qualit\u00e9 de l&rsquo;\u00e9nergie, car ils peuvent causer des probl\u00e8mes et des dommages aux \u00e9quipements, voire interrompre le cycle de production. Le plus important de tous les ph\u00e9nom\u00e8nes de qualit\u00e9 de l&rsquo;\u00e9nergie est l&rsquo;affaissement de la tension : plus de 60 % des co\u00fbts li\u00e9s \u00e0 la mauvaise qualit\u00e9 de l&rsquo;\u00e9nergie sont dus \u00e0 des affaissements de tension. Le co\u00fbt des SAG est normalement inf\u00e9rieur \u00e0 celui d&rsquo;une interruption de l&rsquo;alimentation en tension, mais le premier est de loin plus fr\u00e9quent. Les probl\u00e8mes augmentent avec les appareils \u00e9lectroniques et sophistiqu\u00e9s.<\/p>\n<p><strong>Que sont les CREUX de tension?<\/strong><\/p>\n<p>R\u00e9duction temporaire de la tension efficace en dessous d&rsquo;un seuil sp\u00e9cifique \u00e0 un point de la ligne d&rsquo;alimentation \u00e9lectrique.<\/p>\n<p>Les creux de tension sont g\u00e9n\u00e9ralement caus\u00e9s par des d\u00e9fauts dans le r\u00e9seau public ou dans les installations des utilisateurs du r\u00e9seau, dans quelques cas par des surcharges transitoires dues \u00e0 la mise en marche de gros moteurs ou \u00e0 l&rsquo;allumage de charges importantes. Les creux de tension sont impr\u00e9visibles et al\u00e9atoires.<\/p>\n<p>Le creux de tension commence lorsque la tension est inf\u00e9rieure \u00e0 90% de la valeur nominale et se termine lorsque la tension repasse au-dessus de 90%. La dur\u00e9e des SAGs de tension est comprise entre 10 ms et 1 minute.<\/p>\n<p>La plupart des creux de tension ont une dur\u00e9e inf\u00e9rieure \u00e0 1 seconde et une tension r\u00e9siduelle sup\u00e9rieure \u00e0 40% de la valeur nominale.<\/p>\n<p>Le creux de tension se propage des niveaux de tension sup\u00e9rieurs vers les niveaux inf\u00e9rieurs, la charge est souvent connect\u00e9e \u00e0 un niveau de tension inf\u00e9rieur au point de d\u00e9faillance. Les d\u00e9fauts dans le r\u00e9seau provoquent des SAG de tension profonds s&rsquo;ils se produisent pr\u00e8s des charges. L&rsquo;incidence des GAE de tension est beaucoup plus importante dans le cas d&rsquo;un r\u00e9seau MT a\u00e9rien que dans le cas de c\u00e2bles souterrains.<\/p>\n<p><strong>PERTINENCE DES CREUX DE TENSION<\/strong><\/p>\n<p>Plus l&rsquo;\u00e9quipement est moderne et plus l&rsquo;\u00e9lectronique est n\u00e9cessaire, plus les probl\u00e8mes caus\u00e9s par les creux de tension sont graves. Avec le nombre croissant de sources d&rsquo;\u00e9nergie r\u00e9g\u00e9n\u00e9ratives, les creux de tension, les fluctuations et les \u00e9carts de fr\u00e9quence augmentent \u00e9galement.<br \/>\nExemple de co\u00fbts dus aux creux de tension:<\/p>\n<ul>\n<li>Co\u00fbts du personnel improductif en raison de l&rsquo;arr\u00eat soudain du cycle de production.<\/li>\n<li>Co\u00fbts des mati\u00e8res premi\u00e8res et de la production perdue.<\/li>\n<li>Co\u00fbts des dommages et\/ou des dysfonctionnements des machines (r\u00e9parations, location temporaire de nouvelles machines).<\/li>\n<li>P\u00e9nalit\u00e9s caus\u00e9es par des manquements contractuels.<\/li>\n<li>Sanctions pour dommages \u00e0 l&rsquo;environnement. Augmentation des co\u00fbts des assurances g\u00e9n\u00e9rales.<\/li>\n<\/ul>\n<p><strong>SOLUTION CONTRE LES CREUX DE TENSION<\/strong><br \/>\nDe nombreuses entreprises ont besoin d&rsquo;une immunit\u00e9 aux creux de tension et au conditionnement de la tension plut\u00f4t que d&rsquo;une alimentation de secours par batterie, fournie par un syst\u00e8me UPS. Dans les cas o\u00f9 l&rsquo;alimentation de secours n&rsquo;est pas n\u00e9cessaire, un compensateur de chute de tension offre une protection sup\u00e9rieure et des fonctions suppl\u00e9mentaires de qualit\u00e9 de l&rsquo;\u00e9nergie, telles que la protection contre les creux de tension, la sur\/sous-tension et les fluctuations de tension.<\/p>\n<p>De plus, la protection d&rsquo;une usine enti\u00e8re par des onduleurs, qui peuvent garantir l&rsquo;immunit\u00e9 contre les SAGs, peut \u00eatre tr\u00e8s co\u00fbteuse, en raison des co\u00fbts de batterie et de maintenance.<\/p>\n<p>La bonne solution est le compensateur de creux de tension, qui permet de corriger les creux de tension jusqu&rsquo;\u00e0 -50% pendant 1 minute.<\/p>\n<p>C&rsquo;est une solution \u00e9conomique : pas de co\u00fbts de maintenance et d&rsquo;exploitation, pas de stockage d&rsquo;\u00e9nergie par batterie et un rendement &gt;98% \u00e0 la puissance nominale.<\/p>\n<p><a href=\"https:\/\/www.voltagesag.ortea.com\/index-en.html\">apprendre encore plus<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>L&rsquo;industrie moderne est de plus en plus automatis\u00e9e et la sensibilit\u00e9 des processus aux \u00e9v\u00e9nements li\u00e9s \u00e0 la qualit\u00e9 de l&rsquo;\u00e9nergie augmente. Il est g\u00e9n\u00e9ralement admis que la qualit\u00e9 est un aspect important du service d&rsquo;\u00e9lectricit\u00e9. Il n&rsquo;y a pas que les prix bas qui comptent, la qualit\u00e9 est \u00e9galement importante pour les clients. Le [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2899,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[20096],"tags":[],"class_list":["post-3859","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-qualite-de-l-energie"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Les creux de tension : un probl\u00e8me majeur de qualit\u00e9 de l&#039;\u00e9nergie<\/title>\n<meta name=\"description\" content=\"L&#039;industrie moderne est de plus en plus automatis\u00e9e et la sensibilit\u00e9 des processus aux \u00e9v\u00e9nements li\u00e9s \u00e0 la qualit\u00e9 de l&#039;\u00e9nergie augmente.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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