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Détails bibliographiques
Auteur principal:	Carlos A. Ramos-Paja
Format:	Artículo científico
Langue:	es
Publié:	Instituto Tecnológico Metropolitano 2018
Sujets:	Ingeniería convertidor Buck Cargador baterías panel fotovoltaico control por modos deslizantes limitación derivada de corriente
Accès en ligne:	https://www.redalyc.org/articulo.oa?id=344255453011 https://www.redalyc.org/journal/3442/344255453011/ https://www.redalyc.org/journal/3442/344255453011/html/ https://www.redalyc.org/journal/3442/344255453011/344255453011.epub https://www.redalyc.org/journal/3442/344255453011/movil https://doi.org/10.22430/22565337.784
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Table des matières:

Cargador de baterías fotovoltaico con control por modos deslizantes y limitación de la derivada de corriente de carga Carlos A. Ramos-Paja Andrés J. Saavedra-Montes Juan D. Bastidas-Rodríguez Ingeniería convertidor Buck Cargador baterías panel fotovoltaico control por modos deslizantes limitación derivada de corriente En los sistemas fotovoltaicos (PV) aislados, los cargadores de baterías son importantes para garantizar el suministro de energía cuando la luz solar no está disponible. Dichos cargadores necesitan realizar el seguimiento del punto de máxima potencia (MPPT) y limitar la derivada de corriente de carga de las baterías para extender su vida útil. Este artículo propone un sistema cargador de baterías compuesto por un convertidor Buck, un control en cascada de la corriente de las baterías y la tensión del panel PV, y la técnica de MPPT Perturbar y Observar (P&O). El P&O genera la referencia de tensión del panel para el lazo externo del control en cascada, implementado con un regulador P, cuya acción de control es la referencia de la corriente de carga de las baterías. Dicha referencia de corriente pasa por un limitador de derivada antes de llegar al lazo interno de control de corriente de las baterías, el cual es implementado con un control por modos deslizantes (SMC). El artículo incluye el análisis de transversalidad y alcanzabilidad del SMC, así como el procedimiento de diseño del regulador P. El sistema propuesto se valida por medio de simulaciones en el software PSIM mostrando la capacidad de realizar el MPPT y limitar la derivada de corriente de carga de las baterías al mismo tiempo. 2018 artículo científico 0123-7799 https://www.redalyc.org/articulo.oa?id=344255453011 https://www.redalyc.org/journal/3442/344255453011/ https://www.redalyc.org/journal/3442/344255453011/html/ https://www.redalyc.org/journal/3442/344255453011/344255453011.epub https://www.redalyc.org/journal/3442/344255453011/movil https://doi.org/10.22430/22565337.784 es http://www.redalyc.org/revista.oa?id=3442 TecnoLógicas application/pdf Instituto Tecnológico Metropolitano TecnoLógicas (Colombia) Num.42 Vol.21

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// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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