{"id":7593,"date":"2023-06-02T09:15:41","date_gmt":"2023-06-02T07:15:41","guid":{"rendered":"https:\/\/cubeconcepts.de\/?p=7593"},"modified":"2026-06-12T12:24:46","modified_gmt":"2026-06-12T10:24:46","slug":"le-facteur-de-dimensionnement-pour-les-onduleurs","status":"publish","type":"post","link":"https:\/\/cubeconcepts.de\/fr\/der-dimensionierungsfaktor-fuer-wechselrichter\/","title":{"rendered":"Le facteur de dimensionnement pour les onduleurs"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Le facteur de dimensionnement des onduleurs d\u00e9crit le rapport entre le courant continu (CC) maximal pouvant \u00eatre produit par l&#x27;ensemble des modules photovolta\u00efques install\u00e9s et la puissance de sortie maximale en courant alternatif (CA) de l&#x27;ensemble de l&#x27;installation photovolta\u00efque. Il sert de base de calcul pour d\u00e9terminer la taille et le nombre d&#x27;onduleurs n\u00e9cessaires. Ces derniers transforment l&#x27;\u00e9lectricit\u00e9 solaire en courant alternatif conforme au r\u00e9seau, adapt\u00e9 au raccordement au r\u00e9seau \u00e9lectrique public ou \u00e0 la consommation directe au sein de l&#x27;entreprise. Le facteur de dimensionnement se calcule \u00e0 partir du quotient de la puissance CC de l&#x27;onduleur et de la puissance photovolta\u00efque. En cas de sous-dimensionnement, la valeur est sup\u00e9rieure \u00e0 100 et, en cas de surdimensionnement, inf\u00e9rieure \u00e0 100. Un facteur de dimensionnement de 100 % signifie donc que, par exemple, pour une puissance photovolta\u00efque install\u00e9e de 700 kWc, la puissance CC de l&#x27;onduleur est \u00e9galement de 700 kW. Une telle configuration n&#x27;est toutefois pas toujours la plus optimale ni la plus rentable. C&#x27;est pourquoi le facteur de dimensionnement doit \u00eatre recalcul\u00e9 individuellement lors de la planification de chaque installation photovolta\u00efque commerciale.&nbsp;&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image alignright size-full is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"989\" height=\"751\" src=\"https:\/\/cubeconcepts.de\/wp-content\/uploads\/2023\/06\/MicrosoftTeams-image.png\" alt=\"\" class=\"wp-image-7594\" style=\"width:614px;height:466px\" srcset=\"https:\/\/cubeconcepts.de\/wp-content\/uploads\/2023\/06\/MicrosoftTeams-image.png 989w, https:\/\/cubeconcepts.de\/wp-content\/uploads\/2023\/06\/MicrosoftTeams-image-300x228.png 300w, https:\/\/cubeconcepts.de\/wp-content\/uploads\/2023\/06\/MicrosoftTeams-image-768x583.png 768w\" sizes=\"(max-width: 989px) 100vw, 989px\" \/><figcaption class=\"wp-element-caption\"><em>Exemple : planification d'une installation en toiture de 700 kWp orient\u00e9e est-ouest - chaque couleur repr\u00e9sente une cha\u00eene de modules distincte.<\/em><\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Onduleurs et cha\u00eenes de modules<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La planification de plus grandes installations photovolta\u00efques pour les entreprises devient complexe du fait qu'il ne faut connecter \u00e0 un onduleur que des panneaux solaires dont les puissances r\u00e9elles sont \u00e9gales. Sur une telle cha\u00eene, tous les modules doivent donc avoir la m\u00eame orientation, la m\u00eame inclinaison et le m\u00eame ombrage afin que l'onduleur puisse convertir efficacement le courant continu en courant alternatif. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\">80 cha\u00eenes diff\u00e9rentes pour un dimensionnement \u00e0 700 kWc<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Cependant, on planifie g\u00e9n\u00e9ralement diff\u00e9rentes <a href=\"https:\/\/cubeconcepts.de\/fr\/les-locaux-commerciaux-et-industriels-appropries-pour-les-installations-photovoltaiques\/\">Toitures de halls<\/a>, abnehmbare Carports, D\u00e4cher mit Solaranlagen oder Freifeldanlagen mit unterschiedlichen Ausrichtungen, Neigungen und Verschattungen. Die Berechnung wird jedes Mal neu durchgef\u00fchrt, sobald ein Modulstring mit einem neuen MPP-Tracker des Wechselrichters oder einem MPP-Tracker eines Multistring-Wechselrichters fertig geplant ist. Um bei einer Anlagengr\u00f6\u00dfe von 700 kWp zu bleiben, berechnet der Planer einer einfachen Dach-PV-Anlage dieser Gr\u00f6\u00dfe bereits etwa 80 Strings, wenn die Anlage eine Ost-West-Ausrichtung haben soll, da auch die Anzahl der Module pro String nicht beliebig gro\u00df sein darf: Die leistungsf\u00e4higsten Wechselrichter k\u00f6nnen heute maximal 1.000 Volt pro String umwandeln, was etwa einer Leistung von 20 Modulen entspricht.<\/p>\n\n\n\n<figure class=\"wp-block-image alignleft size-full is-resized\"><img decoding=\"async\" width=\"701\" height=\"402\" src=\"https:\/\/cubeconcepts.de\/wp-content\/uploads\/2023\/06\/MicrosoftTeams-image-1.png\" alt=\"\" class=\"wp-image-7601\" style=\"width:614px;height:352px\" srcset=\"https:\/\/cubeconcepts.de\/wp-content\/uploads\/2023\/06\/MicrosoftTeams-image-1.png 701w, https:\/\/cubeconcepts.de\/wp-content\/uploads\/2023\/06\/MicrosoftTeams-image-1-300x172.png 300w\" sizes=\"(max-width: 701px) 100vw, 701px\" \/><figcaption class=\"wp-element-caption\"><em>Planification d'une seule cha\u00eene avec un facteur de dimensionnement de 117,9 %<\/em><\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">La plupart du temps, les onduleurs fonctionnent \u00e0 charge partielle<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Avec un facteur de dimensionnement pour les onduleurs de 100 %, on part du principe que dans des conditions id\u00e9ales, c'est-\u00e0-dire en cas d'ensoleillement optimal sans nuages et de temp\u00e9ratures inf\u00e9rieures \u00e0 25\u00b0, chaque string et son onduleur fournissent le meilleur rendement \u00e9lectrique possible. De telles conditions sont toutefois rares et la plupart du temps, un onduleur fonctionne en charge partielle. Et c'est justement l\u00e0 que r\u00e9side le probl\u00e8me : tous les onduleurs ne fonctionnent plus aussi efficacement en charge partielle. Cet effet commence \u00e0 se faire sentir \u00e0 partir d'une baisse de puissance de 20 % du string et d'un fonctionnement de l'onduleur \u00e0 80 % de charge partielle. Outre les co\u00fbts d'investissement plus \u00e9lev\u00e9s des grands onduleurs, un sous-dimensionnement est donc tout \u00e0 fait rentable.<\/p>\n\n\n\n<figure class=\"wp-block-image alignright size-full is-resized\"><img decoding=\"async\" width=\"579\" height=\"626\" src=\"https:\/\/cubeconcepts.de\/wp-content\/uploads\/2023\/06\/Screenshot-2023-06-02-090019.jpg\" alt=\"\" class=\"wp-image-7608\" style=\"width:394px;height:425px\" srcset=\"https:\/\/cubeconcepts.de\/wp-content\/uploads\/2023\/06\/Screenshot-2023-06-02-090019.jpg 579w, https:\/\/cubeconcepts.de\/wp-content\/uploads\/2023\/06\/Screenshot-2023-06-02-090019-277x300.jpg 277w\" sizes=\"(max-width: 579px) 100vw, 579px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Un facteur de dimensionnement pour les onduleurs sup\u00e9rieur \u00e0 100 % est rentable<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Bei der wirtschaftlichen Planung einer gesamten Photovoltaikanlage f\u00fcr ein Unternehmen spielt die Berechnung und Dimensionierung der Wechselrichter dadurch eine entscheidende Rolle. Sind sie unterdimensioniert, lassen sich die Leistungsspitzen nur dann kappen, wenn ideale Bedingungen herrschen. Dieser Energieverlust \u00fcber einen gesamten Jahresverlauf einer PV-Anlage ist in der Regel marginal und muss dann den h\u00f6heren Investitionskosten f\u00fcr gr\u00f6\u00dfere Wechselrichter entgegengesetzt werden. Bei einer 700 kWp-Anlage, die j\u00e4hrlich je nach Standort etwa 630.000 &#8211; 700.000 kWh produzieren k\u00f6nnte, wenn sie mit einem Dimensionierungsfaktor von 100 % geplant w\u00fcrde, betr\u00e4gt der Energieverlust in unseren Breitengraden bei einer Unterdimensionierung von 120 %&nbsp; durchschnittlich 4.500 kWh. Demgegen\u00fcber stehen mehrere zehntausende Euro f\u00fcr Wechselrichter, die eine h\u00f6here Nennleistung aufweisen. Je nach Sonneneinstrahlungsintensit\u00e4t gelten in Europa Dimensionierungsfaktoren zwischen 110 und 130 % als besonders wirtschaftlich. Alleine in Deutschland kann dieser Wert um +\/- 5 % je nach Standort variieren.<\/p>","protected":false},"excerpt":{"rendered":"<p>La bonne conception d\u00e9termine l'efficacit\u00e9 de l'ensemble de l'installation photovolta\u00efque \u2013 particuli\u00e8rement pour les projets complexes comportant des orientations de toit diff\u00e9rentes et de nombreux cha\u00eenes de modules. Cet article explique comment trouver l'\u00e9quilibre entre le rendement maximal et les co\u00fbts optimaux du syst\u00e8me en calculant de mani\u00e8re cibl\u00e9e le facteur de dimensionnement.<\/p>","protected":false},"author":3,"featured_media":7596,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[61,25],"tags":[],"class_list":["post-7593","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-grundlagen-technik","category-photovoltaik"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Dimensionierungsfaktor f\u00fcr Wechselrichter | CUBE CONCEPTS<\/title>\n<meta name=\"description\" content=\"Der Dimensionierungsfaktor f\u00fcr Wechselrichter spielt eine entscheidende Rolle f\u00fcr die Wirtschaftlichkeit von Photovoltaikanlagen.\" 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