Publication:
Analysis of optimal matching between a dc motor and photovoltaic modules via dc-dc power converters

dc.contributor.advisor Ortiz-Rivera, Eduardo I.
dc.contributor.author González-Llorente, Jesús D.
dc.contributor.college College of Engineering en_US
dc.contributor.committee Beauchamp-Báez, Gerson
dc.contributor.committee Venkatesan, K.
dc.contributor.department Department of Electrical and Computer Engineering en_US
dc.contributor.representative Rios-Soto, Karen R.
dc.date.accessioned 2019-05-15T17:59:29Z
dc.date.available 2019-05-15T17:59:29Z
dc.date.issued 2009
dc.description.abstract Due to the nonlinear behavior of the photovoltaic (PV) cells, dc-dc power converters are added for matching the load to the photovoltaic generators; thus, maxi- mum power can be reached. In this thesis, mathematical models were used to examine the behavior of the off-grid photovoltaic system composed by: PV generator, dc- dc converter and dc motor. Different converter topologies (step-up, step-down and step-down/step-up) are compared, evaluating their feasibility to be used as interface to attain operation around the maximum power point (MPP). The analysis found the relationships between the optimal duty ratio and the maximum motor speed, which are used to select the simplest topology to meet the requirement as inter- face. Moreover, several maximum power point tracking (MPPT) methods including model-based MPPT methods and MPPT searching algorithms are implemented on a microcontroller and tested in real weather conditions. MPPT searching algorithms are recommended for real applications, such algorithms do not require tuning due to parameter variations by aging or dusty environment of the PV module and the fluctuation of the PV voltage has little effect on the motor speed. en_US
dc.description.abstract Debido al comportamiento no lineal de los módulos fotovoltaicos, es necesario usar convertidores de corriente continua para extraer más potencia por medio del acople de carga. Se utilizan modelos matemáticos para estudiar el comportamiento de un sistema fotovoltaico compuesto de: generador fotovoltaico, convertidor de potencia y motor de corriente continua. Diferentes topologías de convertidores de potencia (reductora, elevadora y reductora-elevadora) son comparadas, evaluando la viabilidad de ser usadas como interfaces para obtener operación alrededor del punto de máxima potencia. Se deriva la relación entre el ciclo útil del convertidor y la velocidad máxima del motor; la cual permite seleccionar la topología más simple que cumple los requerimientos como interface. Además, métodos basados en modelo y métodos de búsqueda para el seguimiento del punto de máxima potencia son implementados en un microcontrolador y probados bajo condiciones climáticas reales. Los métodos de búsqueda son recomendados para aplicaciones prácticas, ya que no requieren ajuste debido al cambio de parámetros de los módulos fotovoltaicos y del poco efecto de la variación del voltaje sobre la velocidad del motor. en_US
dc.description.graduationYear 2009 en_US
dc.identifier.uri https://hdl.handle.net/20.500.11801/2331
dc.language.iso English en_US
dc.rights.holder (c) 2009 Jesús David González-Llorente en_US
dc.rights.license All rights reserved en_US
dc.title Analysis of optimal matching between a dc motor and photovoltaic modules via dc-dc power converters en_US
dc.type Thesis en_US
dspace.entity.type Publication
thesis.degree.discipline Electrical Engineering en_US
thesis.degree.level M.S. en_US
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