Abstract—Alternative
energy sources have for some time attracted great interest in the area of
static converter development. This fact is related in greater part to issues
such as sustainability and detrimental effects on the natural environment,
which all contribute to the viability of this type of energy source. In this
context, power electronics performs important tasks making viable the
connection of all these kind of clean power sources to the conventional grid
and also to the load. From this perspective, a new challenge must be faced
which is the development of energy management systems capable of providing
intelligent planning and control of appliances in low- and high-power applications.
That being so, this paper intends to contribute presenting a novel dual
transformerless single-stage current source inverter fed by a proton exchange
membrane fuel cell (PEMFC) and a photovoltaic (PV) array. High voltage gain and
totally controlled output voltage can be achieved without using dedicated
step-up dc–dc converters or transformers either. The main feature of this
inverter structure is the intelligent power management technique which focuses
on the extraction of maximum power from the PV array keeping the PEMFC as an
energy storage system. Theoretical analysis is presented and corroborated by
experimental results of a 400Wlaboratory prototype.
(IndexTerms—Buck–boost,
current source inverter (CSI), energy management, fuel cell (FC), inverters,
photovoltaic (PV), singlestage, transformerless.)
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