{"id":727,"date":"2025-06-13T13:19:00","date_gmt":"2025-06-13T13:19:00","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%96%b9%e6%a1%88%ef%bc%9a%e5%88%86%e6%b5%81%e5%99%a8%e5%8a%a9%e5%8a%9b%e9%ab%98%e6%95%88%e5%8f%91%e7%94%b5\/"},"modified":"2026-02-04T16:11:21","modified_gmt":"2026-02-04T16:11:21","slug":"schema-de-detection-du-courant-mppt-de-londuleur-pv","status":"publish","type":"post","link":"https:\/\/cnsfdz.com\/fr\/schema-de-detection-du-courant-mppt-de-londuleur-pv\/","title":{"rendered":"Solution de d\u00e9tection du courant MPPT de l'onduleur photovolta\u00efque : Splitters pour une production d'\u00e9nergie efficace"},"content":{"rendered":"<h2>I. Aper\u00e7u de la technologie MPPT<\/h2>\n<p>Le suivi du point de puissance maximale (MPPT) est la technologie de base des syst\u00e8mes de production d'\u00e9nergie photovolta\u00efque. \u00c9tant donn\u00e9 que les caract\u00e9ristiques de sortie des cellules photovolta\u00efques ne sont pas lin\u00e9aires et que leur point de fonctionnement change en fonction de l'intensit\u00e9 lumineuse et de la temp\u00e9rature, les contr\u00f4leurs MPPT ajustent la tension de fonctionnement des r\u00e9seaux photovolta\u00efques en temps r\u00e9el afin qu'ils fonctionnent toujours au point de puissance maximale, maximisant ainsi l'efficacit\u00e9 de la production d'\u00e9nergie.<\/p>\n<p>Selon les statistiques, l'utilisation de la technologie MPPT peut augmenter la production d'\u00e9lectricit\u00e9 de 20%~30% par rapport \u00e0 la connexion directe, avec des avantages \u00e9conomiques significatifs. L'ex\u00e9cution pr\u00e9cise de l'algorithme MPPT repose sur une d\u00e9tection pr\u00e9cise de la tension et du courant.<\/p>\n<h2>II - Exigences techniques pour la d\u00e9tection du courant photovolta\u00efque<\/h2>\n<h3>2.1 Plage de courant<\/h3>\n<p>En fonction du type d'onduleur et de la puissance nominale :<\/p>\n<ul>\n<li>Onduleur string : courant MPPT unique 10~20A<\/li>\n<li>Onduleurs centralis\u00e9s : courants de bus jusqu'\u00e0 plusieurs centaines d'amp\u00e8res<\/li>\n<li>Micro-onduleurs : courant plus faible, g\u00e9n\u00e9ralement&lt;15A<\/li>\n<\/ul>\n<h3>2.2 Exigences de pr\u00e9cision<\/h3>\n<p>La pr\u00e9cision de la d\u00e9tection du courant MPPT affecte directement l'efficacit\u00e9 du suivi :<\/p>\n<ul>\n<li>La d\u00e9tection de haute pr\u00e9cision permet des calculs de puissance plus pr\u00e9cis<\/li>\n<li>Pr\u00e9cision recommand\u00e9e \u2264 1%, les produits haut de gamme n\u00e9cessitent \u2264 0,5%.<\/li>\n<li>Petite erreur lin\u00e9aire sur l'ensemble de la gamme pour garantir la pr\u00e9cision pour les petits et les grands courants.<\/li>\n<\/ul>\n<h3>2.3 R\u00e9ponse dynamique<\/h3>\n<p>Les changements de lumi\u00e8re (par exemple, la couverture nuageuse) peuvent entra\u00eener des variations rapides du courant, dont le circuit de d\u00e9tection a besoin :<\/p>\n<ul>\n<li>Largeur de bande &gt;10kHz<\/li>\n<li>Une r\u00e9ponse rapide pour suivre les changements en cours<\/li>\n<li>Capacit\u00e9 anti-interf\u00e9rence \u00e9lev\u00e9e<\/li>\n<\/ul>\n<h3>2.4 Large gamme de temp\u00e9ratures<\/h3>\n<p>Les onduleurs photovolta\u00efques sont g\u00e9n\u00e9ralement install\u00e9s \u00e0 l'ext\u00e9rieur, dans une large gamme de temp\u00e9ratures de fonctionnement :<\/p>\n<ul>\n<li>Temp\u00e9rature ambiante : -25\u00b0C \u00e0 +60\u00b0C<\/li>\n<li>L'int\u00e9rieur du ch\u00e2ssis peut \u00eatre plus haut<\/li>\n<li>Les capteurs de courant n\u00e9cessitent une bonne stabilit\u00e9 de temp\u00e9rature<\/li>\n<\/ul>\n<h2>III. avantages du programme shunt<\/h2>\n<h3>3.1 Haute pr\u00e9cision<\/h3>\n<p>Le shunt peut fournir une pr\u00e9cision de 0,5%, voire plus, pour r\u00e9pondre aux besoins d'un MPPT \u00e0 haut rendement. L'avantage de la pr\u00e9cision par rapport aux capteurs \u00e0 effet Hall est \u00e9vident.<\/p>\n<h3>3.2 Bonne lin\u00e9arit\u00e9<\/h3>\n<p>La caract\u00e9ristique V-I du shunt est parfaitement lin\u00e9aire, avec une erreur constante pour les courants faibles et \u00e9lev\u00e9s. Ceci est important pour les applications avec une large gamme de variations de lumi\u00e8re.<\/p>\n<h3>3.3 Pas de d\u00e9rive z\u00e9ro<\/h3>\n<p>Les capteurs \u00e0 effet Hall souffrent d'une d\u00e9rive du z\u00e9ro de temp\u00e9rature, qui a un effet significatif sur la large gamme de temp\u00e9ratures des applications photovolta\u00efques. Les shunts n'ont pas ce probl\u00e8me.<\/p>\n<h3>3.4 Fiabilit\u00e9 \u00e9lev\u00e9e<\/h3>\n<p>Le shunt est un dispositif purement passif, aucune alimentation n'est n\u00e9cessaire et il n'y a pas de vieillissement de l'\u00e9lectronique. Avec une dur\u00e9e de vie de 25 ans pour les syst\u00e8mes photovolta\u00efques, la fiabilit\u00e9 est essentielle.<\/p>\n<h3>3.5 Avantages en termes de co\u00fbts<\/h3>\n<p>Les onduleurs de branche ont g\u00e9n\u00e9ralement plusieurs MPPT, chacun n\u00e9cessitant une d\u00e9tection de courant. L'avantage financier d'un shunt est encore plus \u00e9vident en cas de d\u00e9tection multiple.<\/p>\n<h2>Quatri\u00e8mement, le guide de s\u00e9lection des shunts<\/h2>\n<h3>4.1 Sp\u00e9cifications actuelles<\/h3>\n<p>S\u00e9lectionn\u00e9 en fonction du courant d'entr\u00e9e maximal du MPPT, r\u00e9servant une marge de 20% :<\/p>\n<ul>\n<li>10A MPPT \u2192 shunt 15A en option<\/li>\n<li>15A MPPT \u2192 20A shunt en option<\/li>\n<li>MPPT 20A \u2192 shunt 25A ou 30A en option<\/li>\n<\/ul>\n<h3>4.2 S\u00e9lection de la r\u00e9sistance<\/h3>\n<p>\u00c9quilibrer la pr\u00e9cision et la consommation d'\u00e9nergie :<\/p>\n<ul>\n<li>Faible valeur de r\u00e9sistance (par exemple 1m\u03a9) : faible consommation d'\u00e9nergie, mais signal faible, exigences \u00e9lev\u00e9es en mati\u00e8re d'amplificateurs op.<\/li>\n<li>R\u00e9sistance moyenne (par exemple 5m\u03a9) : signal mod\u00e9r\u00e9, consommation d'\u00e9nergie acceptable<\/li>\n<li>R\u00e9sistance plus \u00e9lev\u00e9e (par exemple 10m\u03a9) : signal fort, mais consommation de 4W \u00e0 20A<\/li>\n<\/ul>\n<p>Les onduleurs de branche sont g\u00e9n\u00e9ralement utilis\u00e9s avec des shunts de 5~10m\u03a9.<\/p>\n<h3>4.3 Coefficient de temp\u00e9rature<\/h3>\n<p>Large plage de temp\u00e9rature pour les applications photovolta\u00efques, TCR \u2264 50ppm\/\u00b0C est recommand\u00e9, \u2264 30ppm\/\u00b0C est pr\u00e9f\u00e9r\u00e9.<\/p>\n<h3>4.4 Formes d'encapsulation<\/h3>\n<ul>\n<li><strong>\u00e0 base de puce<\/strong>Les appareils de soudage sont con\u00e7us pour le soudage direct de circuits imprim\u00e9s \u00e0 faible courant.<\/li>\n<li><strong>plug-in (logiciel)<\/strong>La technologie de l'eau : adapt\u00e9e aux courants moyens et \u00e0 une bonne dissipation de la chaleur.<\/li>\n<li><strong>sch\u00e9ma de boulonnage<\/strong>: convient pour les courants \u00e9lev\u00e9s, n\u00e9cessite une installation s\u00e9par\u00e9e<\/li>\n<\/ul>\n<h2>V. Points de conception du circuit<\/h2>\n<h3>5.1 Conditionnement du signal<\/h3>\n<ul>\n<li>Utilisation d'amplificateurs opto\u00e9lectroniques de haute pr\u00e9cision ou d'amplificateurs \u00e0 d\u00e9tection de courant<\/li>\n<li>Le r\u00e9glage du gain correspond \u00e0 la plage d'entr\u00e9e de l'ADC<\/li>\n<li>Ajouter un filtrage passe-bas pour supprimer le bruit de commutation<\/li>\n<\/ul>\n<h3>5.2 Traitement de la tension en mode commun<\/h3>\n<p>Des panneaux photovolta\u00efques avec des tensions de sortie allant jusqu'\u00e0 1000V ou plus sont n\u00e9cessaires :<\/p>\n<ul>\n<li>Amplification diff\u00e9rentielle avec un taux de r\u00e9jection en mode commun \u00e9lev\u00e9<\/li>\n<li>Ou utiliser un programme de s\u00e9gr\u00e9gation<\/li>\n<\/ul>\n<h3>5.3 Disposition du circuit imprim\u00e9<\/h3>\n<ul>\n<li>Largeur ad\u00e9quate pour l'alignement des courants forts<\/li>\n<li>La ligne de d\u00e9tection de tension est fine et \u00e9loign\u00e9e de la ligne \u00e9lectrique<\/li>\n<li>M\u00e9thode de connexion \u00e0 quatre bornes<\/li>\n<\/ul>\n<h3>5.4 Conception thermique<\/h3>\n<p>Bien que la consommation d'\u00e9nergie du shunt ne soit pas importante, la dissipation de la chaleur doit toujours \u00eatre prise en compte dans un ch\u00e2ssis scell\u00e9 :<\/p>\n<ul>\n<li>Dissipation de la chaleur des feuilles de cuivre pour circuits imprim\u00e9s<\/li>\n<li>Bon contact avec le radiateur<\/li>\n<li>\u00c9viter les points chauds affectant les autres composants<\/li>\n<\/ul>\n<h2>VI. algorithme MPPT et d\u00e9tection du courant<\/h2>\n<h3>6.1 Observation des perturbations (P&amp;O)<\/h3>\n<p>L'algorithme MPPT le plus couramment utilis\u00e9 d\u00e9termine la direction de l'ajustement en apportant de petites modifications au point de fonctionnement et en comparant les changements de puissance. Exigences mod\u00e9r\u00e9es en mati\u00e8re de pr\u00e9cision de la d\u00e9tection du courant.<\/p>\n<h3>6.2 M\u00e9thode de conductivit\u00e9 incr\u00e9mentale (INC)<\/h3>\n<p>La d\u00e9termination du point de puissance maximale sur la base de la relation dI\/dV = -I\/V exige une plus grande pr\u00e9cision de d\u00e9tection du courant et de la tension.<\/p>\n<h3>6.3 Algorithmes intelligents<\/h3>\n<p>Des algorithmes intelligents tels que le contr\u00f4le flou et les r\u00e9seaux neuronaux sont progressivement appliqu\u00e9s, ce qui pose des exigences \u00e9lev\u00e9es en mati\u00e8re de pr\u00e9cision et de r\u00e9ponse dynamique de la d\u00e9tection du courant.<\/p>\n<h2>VII. cas d'application<\/h2>\n<h3>7.1 Une marque d'onduleur de branche<\/h3>\n<p>Onduleur string 60kW, 4 voies MPPT, 15A chacun :<\/p>\n<ul>\n<li>Shunt : 5m\u03a9\/20A, pr\u00e9cision 0,5%<\/li>\n<li>Conditionnement du signal : puce de d\u00e9tection de courant d\u00e9di\u00e9e<\/li>\n<li>CAN : type SAR 16 bits, taux d'\u00e9chantillonnage 100 kHz<\/li>\n<li>Efficacit\u00e9 MPPT mesur\u00e9e : &gt;99,5%<\/li>\n<\/ul>\n<h3>7.2 Micro-onduleurs d'une certaine marque<\/h3>\n<p>Micro-onduleur de 300W avec un seul MPPT :<\/p>\n<ul>\n<li>Shunt : 10m\u03a9\/15A, bo\u00eetier SMD<\/li>\n<li>D\u00e9tection ADC int\u00e9gr\u00e9e dans le contr\u00f4leur h\u00f4te<\/li>\n<li>Optimisation des co\u00fbts, performance pour r\u00e9pondre \u00e0 la demande<\/li>\n<\/ul>\n<h2>VIII. les tendances du march\u00e9<\/h2>\n<h3>8.1 Modules de haute puissance<\/h3>\n<p>Lorsque la puissance du module PV augmente (600W+), le courant d'entr\u00e9e MPPT augmente, ce qui impose des exigences plus \u00e9lev\u00e9es aux sp\u00e9cifications du shunt.<\/p>\n<h3>8.2 MPPT multiple<\/h3>\n<p>Pour s'adapter aux toits complexes et aux sc\u00e9narios partiellement ombrag\u00e9s, le nombre de chemins MPPT des onduleurs de branche augmente, ainsi que l'utilisation des shunts.<\/p>\n<h3>8.3 Intelligence<\/h3>\n<p>L'onduleur est interconnect\u00e9 avec la plateforme cloud pour surveiller les donn\u00e9es de production d'\u00e9nergie en temps r\u00e9el, ce qui augmente les exigences en mati\u00e8re de pr\u00e9cision de d\u00e9tection du courant et de stabilit\u00e9 \u00e0 long terme.<\/p>\n<h2>IX. r\u00e9sum\u00e9<\/h2>\n<p>Gr\u00e2ce \u00e0 sa haute pr\u00e9cision, sa grande fiabilit\u00e9 et son co\u00fbt avantageux, le shunt est devenu la solution la plus courante pour la d\u00e9tection du courant MPPT dans les onduleurs photovolta\u00efques. Les facteurs tels que les sp\u00e9cifications de courant, les exigences de pr\u00e9cision, la plage de temp\u00e9rature, etc. doivent \u00eatre pris en compte de mani\u00e8re exhaustive lors de la s\u00e9lection, et il convient de pr\u00eater attention aux d\u00e9tails tels que le conditionnement du signal, le traitement du mode commun et la dissipation de chaleur dans la conception du circuit. Avec le d\u00e9veloppement continu de l'industrie photovolta\u00efque, le shunt jouera un r\u00f4le de plus en plus important dans la production efficace d'\u00e9lectricit\u00e9.<\/p>","protected":false},"excerpt":{"rendered":"<p>\u5206\u6790\u5206\u6d41\u5668\u5728\u5149\u4f0f\u9006\u53d8\u5668MPPT\u63a7\u5236\u4e2d\u7684\u5e94\u7528\uff0c\u63a2\u8ba8\u5982\u4f55\u901a\u8fc7\u7cbe\u786e\u7535\u6d41\u68c0\u6d4b\u63d0\u5347\u53d1\u7535\u6548\u7387\u3002<\/p>","protected":false},"author":1,"featured_media":740,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[],"class_list":["post-727","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.9 (Yoast SEO v26.9) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ 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