Capacitorless DC-DC regulator as a candidate topology for photovoltaic solar facilities
Linear-assisted DC/DC converters (or linearswitching hybrid DC/DC converters) consist of a voltage linear regulator (classic NPN or nMOS topologies and LDO) connected in parallel with a switching DC/DC converter. They are a good candidate for energy processing in photovoltaic solar facilities. In or...
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2015 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/28270 |
| Acceso en línea: | https://hdl.handle.net/2117/28270 |
| Access Level: | acceso abierto |
| Palabra clave: | DC-to-DC converters Photovoltaic power generation DC-DC Switching Converters Voltage Linear Regulators Linear-Assisted DC-DC Voltage Regulators. Convertidors continu-continu Energia solar fotovoltaica Àrees temàtiques de la UPC::Enginyeria electrònica |
| Sumario: | Linear-assisted DC/DC converters (or linearswitching hybrid DC/DC converters) consist of a voltage linear regulator (classic NPN or nMOS topologies and LDO) connected in parallel with a switching DC/DC converter. They are a good candidate for energy processing in photovoltaic solar facilities. In order to control these hybrid structures, different strategies exist, allowing fixing the switching frequency as a function of some parameters of the linear regulator. This article compares two control strategies that, although can be applied to the same circuital structure of linear-assisted converter, are sensibly different. The first one, reported in previous literature, cancelscompletely the average current through the linear regulator in steady state to achieve a reduction of the losses. Thus, the efficiency of the whole system increases and almost equals the one of the standalone switching converter. The proposed approach, in spite of a slightly increment of linear regulator’s losses, reduces the output ripple due to the crossover distortion of linear regulator output stage. |
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