{"id":604,"date":"2026-02-01T17:45:09","date_gmt":"2026-02-01T17:45:09","guid":{"rendered":"https:\/\/cnsfdz.com\/%e5%85%89%e4%bc%8f%e9%80%86%e5%8f%98%e5%99%a8mppt%e7%94%b5%e6%b5%81%e6%a3%80%e6%b5%8b%e6%8a%80%e6%9c%af%ef%bc%9a%e5%88%86%e6%b5%81%e5%99%a8%e5%9c%a8%e6%96%b0%e8%83%bd%e6%ba%90%e5%8f%91%e7%94%b5\/"},"modified":"2026-02-04T16:11:08","modified_gmt":"2026-02-04T16:11:08","slug":"technique-de-detection-du-courant-mppt-de-londuleur-photovoltaique","status":"publish","type":"post","link":"https:\/\/cnsfdz.com\/fr\/technique-de-detection-du-courant-mppt-de-londuleur-photovoltaique\/","title":{"rendered":"Technologie de d\u00e9tection du courant MPPT de l'onduleur photovolta\u00efque : application cl\u00e9 des s\u00e9parateurs dans la production d'\u00e9nergie nouvelle"},"content":{"rendered":"<h2>Aper\u00e7u de la production d'\u00e9lectricit\u00e9 photovolta\u00efque et de la technologie MPPT<\/h2>\n<p>La production d'\u00e9nergie solaire photovolta\u00efque (PV) est un moyen important d'atteindre l'objectif de neutralit\u00e9 carbone. En 2024, la capacit\u00e9 install\u00e9e cumul\u00e9e de l'\u00e9nergie photovolta\u00efque dans le monde d\u00e9passera 1 500 GW, la Chine se classant au premier rang mondial avec une capacit\u00e9 install\u00e9e de plus de 600 GW. En tant qu'\u00e9quipement central reliant les modules photovolta\u00efques au r\u00e9seau, les performances des onduleurs photovolta\u00efques ont une incidence directe sur l'efficacit\u00e9 de la production d'\u00e9nergie de l'ensemble du syst\u00e8me.<\/p>\n<p>Le suivi du point de puissance maximale (MPPT) est l'une des fonctions essentielles des onduleurs photovolta\u00efques. Comme la puissance de sortie des modules photovolta\u00efques varie en fonction de l'intensit\u00e9 lumineuse et de la temp\u00e9rature, le contr\u00f4leur MPPT maximise l'efficacit\u00e9 de la r\u00e9colte d'\u00e9nergie en ajustant le point de fonctionnement en temps r\u00e9el afin que le syst\u00e8me fonctionne toujours dans l'\u00e9tat de puissance de sortie maximale.<\/p>\n<h2>I. Principe de contr\u00f4le MPPT et exigences en mati\u00e8re de d\u00e9tection de courant<\/h2>\n<h3>1.1 Caract\u00e9ristiques I-V des modules PV<\/h3>\n<p>La courbe caract\u00e9ristique courant-tension (I-V) d'un module photovolta\u00efque n'est pas lin\u00e9aire. Dans des conditions sp\u00e9cifiques de lumi\u00e8re et de temp\u00e9rature, il existe un point de fonctionnement qui maximise la puissance de sortie, appel\u00e9 point de puissance maximale (PPM). Lorsque les conditions environnementales changent, le MPP se d\u00e9place.<\/p>\n<h3>1.2 Algorithme MPPT<\/h3>\n<p>Les algorithmes MPPT couramment utilis\u00e9s sont les suivants<\/p>\n<ul>\n<li><strong>Observation des perturbations (P&amp;O) :<\/strong>Le MPP est trouv\u00e9 en faisant de petits ajustements \u00e0 la tension de fonctionnement et en observant la direction du changement de puissance.<\/li>\n<li><strong>M\u00e9thode de la conductance incr\u00e9mentale (INC) :<\/strong>Suivi bas\u00e9 sur la condition dP\/dV = 0 au MPP<\/li>\n<li><strong>Algorithmes intelligents tels que le contr\u00f4le flou et les r\u00e9seaux neuronaux :<\/strong>Adaptation \u00e0 des conditions environnementales complexes<\/li>\n<\/ul>\n<p>Quel que soit l'algorithme utilis\u00e9, des mesures pr\u00e9cises du courant et de la tension sont n\u00e9cessaires pour calculer la puissance en temps r\u00e9el afin de prendre des d\u00e9cisions de contr\u00f4le.<\/p>\n<h3>1.3 Exigences en mati\u00e8re de pr\u00e9cision de la d\u00e9tection de courant<\/h3>\n<p>L'am\u00e9lioration de l'efficacit\u00e9 du MPPT d\u00e9pend de la pr\u00e9cision de la d\u00e9tection du courant. Des \u00e9tudes ont montr\u00e9 que pour chaque augmentation de 1% de l'erreur de mesure du courant, l'efficacit\u00e9 MPPT peut chuter de 0,3%~0,5%, ce qui signifie une perte consid\u00e9rable de production d'\u00e9nergie pour les centrales photovolta\u00efques \u00e0 grande \u00e9chelle. Par cons\u00e9quent, les onduleurs de branche exigent g\u00e9n\u00e9ralement une pr\u00e9cision de d\u00e9tection du courant de \u00b10,5% ou plus.<\/p>\n<h2>Architecture des onduleurs de branche<\/h2>\n<h3>2.1 Composants du syst\u00e8me<\/h3>\n<p>Les onduleurs de branche sont les produits les plus courants sur le march\u00e9 actuel, et leur architecture de base comprend :<\/p>\n<ul>\n<li><strong>Entr\u00e9e DC :<\/strong>Entr\u00e9es MPPT multiples, chacune connect\u00e9e \u00e0 un certain nombre de cha\u00eenes PV<\/li>\n<li><strong>Boost\/buck DC-DC :<\/strong>R\u00e9glage de la tension continue pour la fonction MPPT<\/li>\n<li><strong>Onduleur DC-AC :<\/strong>Conversion du courant continu en courant alternatif<\/li>\n<li><strong>Filtrage et protection :<\/strong>Filtrage de la sortie et diverses fonctions de protection<\/li>\n<\/ul>\n<h3>2.2 Points de d\u00e9tection actuels<\/h3>\n<p>Dans les onduleurs de branche, les endroits o\u00f9 la d\u00e9tection du courant est n\u00e9cessaire sont les suivants :<\/p>\n<ul>\n<li><strong>Courant d'entr\u00e9e MPPT par circuit :<\/strong>Pour un contr\u00f4le MPPT ind\u00e9pendant<\/li>\n<li><strong>Courant de bus DC :<\/strong>Pour le calcul de la puissance et la protection<\/li>\n<li><strong>Courant de sortie AC :<\/strong>Pour le contr\u00f4le et le comptage connect\u00e9s au r\u00e9seau<\/li>\n<\/ul>\n<h2>III. application des shunts dans les onduleurs photovolta\u00efques<\/h2>\n<h3>3.1 D\u00e9tection du courant d'entr\u00e9e MPPT<\/h3>\n<p>Chaque canal MPPT n\u00e9cessite une d\u00e9tection de courant ind\u00e9pendante. \u00c9tant donn\u00e9 que les onduleurs de branche ont g\u00e9n\u00e9ralement plusieurs canaux MPPT (par exemple, 10 \u00e0 12 canaux), l'utilisation d'un sch\u00e9ma shunt pr\u00e9sente un avantage en termes de co\u00fbts.<\/p>\n<p>La plage de courant MPPT typique est de 10A~30A. Param\u00e8tres de s\u00e9lection du shunt :<\/p>\n<ul>\n<li>Courant nominal : 30A~50A<\/li>\n<li>Valeur de r\u00e9sistance : 1m\u03a9~5m\u03a9<\/li>\n<li>Pr\u00e9cision : \u00b10,5% ou mieux<\/li>\n<li>TCR : \u00e0 l'int\u00e9rieur de \u00b150ppm\/\u00b0C<\/li>\n<\/ul>\n<h3>3.2 D\u00e9tection du courant du bus DC<\/h3>\n<p>Les courants de bus DC sont g\u00e9n\u00e9ralement \u00e9lev\u00e9s (jusqu'\u00e0 100 A ou plus) et des capteurs \u00e0 effet Hall ou des shunts \u00e0 courant \u00e9lev\u00e9 peuvent \u00eatre utilis\u00e9s. Lors de l'utilisation de shunts, une attention particuli\u00e8re doit \u00eatre accord\u00e9e \u00e0 la conception thermique.<\/p>\n<h3>3.3 Tendance \u00e0 la miniaturisation et \u00e0 l'int\u00e9gration<\/h3>\n<p>L'\u00e9volution des onduleurs vers une densit\u00e9 de puissance \u00e9lev\u00e9e n\u00e9cessite de plus en plus la miniaturisation des composants de d\u00e9tection de courant. Les shunts CMS sont de plus en plus utilis\u00e9s dans les onduleurs photovolta\u00efques en raison de leur petite taille et de leur production automatis\u00e9e facile.<\/p>\n<h2>IV. points de conception et cas d'application<\/h2>\n<h3>4.1 Conception du conditionnement du signal<\/h3>\n<p>Le signal en millivolts \u00e9mis par le shunt doit \u00eatre amplifi\u00e9 et filtr\u00e9. Les points \u00e0 prendre en compte lors de la conception sont les suivants :<\/p>\n<ul>\n<li>S\u00e9lection d'amplificateurs op\u00e9rationnels \u00e0 faible biais et faible d\u00e9rive<\/li>\n<li>Concevoir le bon gain pour exploiter pleinement la gamme ADC<\/li>\n<li>Ajout d'un filtre RC pour supprimer les bruits de haute fr\u00e9quence<\/li>\n<\/ul>\n<h3>4.2 Applications<\/h3>\n<p>L'un des principaux fabricants d'onduleurs au monde en termes de livraisons a adopt\u00e9 la solution de shunt \u00e0 puce de Safran pour ses onduleurs de cha\u00eene de 110 kW. Cette solution pr\u00e9sente les caract\u00e9ristiques suivantes<\/p>\n<ul>\n<li>D\u00e9tection ind\u00e9pendante MPPT \u00e0 12 canaux<\/li>\n<li>Pr\u00e9cision de la d\u00e9tection du courant \u00b10,3%<\/li>\n<li>Fourniture annuelle de plus d'un million de produits<\/li>\n<li>Les exportations couvrent plus de 30 pays dans le monde entier<\/li>\n<\/ul>\n<h2>V. Tendances futures en mati\u00e8re de d\u00e9veloppement<\/h2>\n<h3>5.1 Densit\u00e9 de puissance plus \u00e9lev\u00e9e<\/h3>\n<p>Les onduleurs photovolta\u00efques \u00e9voluent vers des densit\u00e9s de puissance plus \u00e9lev\u00e9es, ce qui impose des exigences accrues en mati\u00e8re de densit\u00e9 de puissance et de dissipation thermique des \u00e9l\u00e9ments de d\u00e9tection de courant.<\/p>\n<h3>5.2 Intelligence et num\u00e9risation<\/h3>\n<p>Avec le d\u00e9veloppement des centrales photovolta\u00efques intelligentes, les donn\u00e9es de d\u00e9tection du courant seront combin\u00e9es \u00e0 la plateforme en nuage pour r\u00e9aliser une surveillance \u00e0 distance et un fonctionnement et une maintenance intelligents.<\/p>\n<h2>remarques finales<\/h2>\n<p>La d\u00e9tection pr\u00e9cise du courant est la base d'un contr\u00f4le MPPT efficace. Les shunts jouent un r\u00f4le important dans les onduleurs photovolta\u00efques gr\u00e2ce \u00e0 leur haute pr\u00e9cision et \u00e0 leur faible co\u00fbt. Safran est au service de l'industrie photovolta\u00efque depuis de nombreuses ann\u00e9es et a accumul\u00e9 une grande exp\u00e9rience en mati\u00e8re d'applications, offrant \u00e0 ses clients un soutien complet, de la s\u00e9lection \u00e0 la production de masse.<\/p>","protected":false},"excerpt":{"rendered":"<p>L'application des shunts dans les syst\u00e8mes de suivi du point de puissance maximale (MPPT) pour les onduleurs photovolta\u00efques est examin\u00e9e, ainsi que la mani\u00e8re d'am\u00e9liorer l'efficacit\u00e9 de la production d'\u00e9nergie photovolta\u00efque gr\u00e2ce \u00e0 une d\u00e9tection pr\u00e9cise du courant.<\/p>","protected":false},"author":1,"featured_media":752,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[123],"tags":[],"class_list":["post-604","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-123"],"yoast_head":"<!-- This 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