Thesis MICROINVERSOR FOTOVOLTAICO CON 2 ETAPAS ELEVADORAS
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Date
2016-11
Journal Title
Journal ISSN
Volume Title
Program
DEPARTAMENTO DE ELECTRÓNICA. INGENIERÍA CIVIL ELECTRÓNICA
Campus
Casa Central Valparaíso
Abstract
El siguiente trabajo tiene como objetivo averiguar cual es la forma mas eficiente de realizar la
conexión entre un panel fotovoltaico y la red eléctrica. Por esta razón se propone una topología
novedosa que es un tipo de conexión a la red mediante un micro inversor de 2 etapas
elevadoras como alterativa a las configuraciones clásicas actuales, ya que en las topologías
clásicas al efectuar una elevación muy drástica de voltaje, los convertidores se vuelven menos
eficientes. Este trabajo se efectúa mediante simulación, dejando como futuro proyecto la
construcción física de los sistemas para la comparación experimental de la eficiencia de estos.
Existen 2 tipos de topologías clásicas para la conexión a red en la industria. La primera
consiste en una etapa de conversión DC-DC dedicada a elevar el voltaje del panel, funcionar
en el punto de máxima potencia (MPPT), para posteriormente utilizar un convertidor DC-AC
que realice la conexión a la red. La segunda topología es un convertidor DC-AC único,
realizando el MPPT junto a la elevación de voltaje y la conexión a la red, todo en solo una
etapa.
Este proyecto esta enfocado a una tercera configuración, la que consiste en un micro inversor
de dos etapas DC-DC y DC-AC ambas elevadoras. El objetivo final es analizar si la topología
propuesta permite obtener mejor eficiencia que las configuraciones clásicas existentes, y así
lograr resolver la problemática: ¿Es mejor repartir el esfuerzo de elevación entre 2 o más
etapas, o los esquemas clásicos son mas eficientes?.
Finalmente se realiza una comparación individual de las topologías empleadas en este trabajo
y una comparación final conjunta de la eficiencia para todas las topologías.
The following work has as objective figuring what is the most efficient way to realize the connection between the photovoltaic cells and the power grid. For this reason it proposes a novel topology which is a type of connection to the network using a micro inverter with 2 step- up stages as an alternative to classical solutions. This because in the classic topologies to make a very drastic elevation voltage converters are become less efficient. This work is done by simulation, leaving future project construction of physical topologies for experimental comparison of their efficiency. There are 2 types of classic topologies for connection to the grid. One consists of a first stage of conversion DC-DC dedicated to step-up the voltage of the panel, operate at the point of maximum power (MPPT) and then a DC-AC converter to connect to the network, a second topology is a converter DC-AC only, performing MPPT with the elevation of voltage and connection to the network, all in one step. This project is focused on a third configuration, which consists of a micro inverter with 2 step- up stages DC-DC and DC-AC. The ultimate goal is to analyze whether the proposed topology allows a better efficiency than existing classical configurations and thus answer the following problematic: Is it better distribute the elevation effort between 2 or more steps, or the classic scheme are more efficiency? Finally, an individual comparison of the topologies used in this work and a final joint comparison of the efficiency for all the topologies is made.
The following work has as objective figuring what is the most efficient way to realize the connection between the photovoltaic cells and the power grid. For this reason it proposes a novel topology which is a type of connection to the network using a micro inverter with 2 step- up stages as an alternative to classical solutions. This because in the classic topologies to make a very drastic elevation voltage converters are become less efficient. This work is done by simulation, leaving future project construction of physical topologies for experimental comparison of their efficiency. There are 2 types of classic topologies for connection to the grid. One consists of a first stage of conversion DC-DC dedicated to step-up the voltage of the panel, operate at the point of maximum power (MPPT) and then a DC-AC converter to connect to the network, a second topology is a converter DC-AC only, performing MPPT with the elevation of voltage and connection to the network, all in one step. This project is focused on a third configuration, which consists of a micro inverter with 2 step- up stages DC-DC and DC-AC. The ultimate goal is to analyze whether the proposed topology allows a better efficiency than existing classical configurations and thus answer the following problematic: Is it better distribute the elevation effort between 2 or more steps, or the classic scheme are more efficiency? Finally, an individual comparison of the topologies used in this work and a final joint comparison of the efficiency for all the topologies is made.
Description
Keywords
MICRO INVERSOR DE 2 ETAPAS