Actas de congresos
Evaluation of integrated inverter topologies for low power PV systems
3rd International Conference on Clean Electrical Power: Renewable Energy Resources Impact, ICCEP 2011, p. 35-39.
Universidade Estadual Paulista (UNESP)
This work presents the stage integration in power electronics converters as a suitable solution for solar photovoltaic inverters. The rated voltages available in Photovoltaic (PV) modules have usually low values for applications such as regulated output voltages in stand-alone or grid-connected configurations. In these cases, a boost stage or a transformer will be necessary. Transformers have low efficiencies, heavy weights and have been used only when galvanic isolation is mandatory. Furthermore, high-frequency transformers increase the converter complexity. Therefore, the most usual topologies use a boost stage and one inverter stage cascaded. However, the complexity, size, weight, cost and lifetime might be improved considering the integration of both stages. These are the expected features to turn attractive this kind of integrated structures. Therefore, some integrated converters are analyzed and compared in this paper in order to support future evaluations and trends for low power single-phase inverters for PV systems. © 2011 IEEE.
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Gazoli, Jonas Rafael; Villalva, Marcelo Gradella; Siqueira, Thais G.; Ruppert, Ernesto
Junior, Luigi G.; De Brito, Moacyr A. G.; Sampaio, Leonardo P.; Canesin, Carlos A.
Universidade Estadual de Campinas (UNICAMP); Universidade Estadual Paulista (UNESP); Federal University of Alfenas (2012-12-11)Two-stage isolated converters for photovoltaic (PV) applications commonly employ a high-frequency transformer on the DC-DC side, submitting the DC-AC inverter switches to high voltages and forcing the use of IGBTs instead ...