Photovoltaic system with battery and reserve power plant
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United States of America Patent
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May 15, 2012
Grant Date -
Oct 21, 2010
app pub date -
Apr 20, 2010
filing date -
Apr 21, 2009
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for operating a photovoltaic system with a plurality of photovoltaic modules and with a DC motor connected to the photovoltaic modules is proposed. The motor shaft of the DC motor is coupled to a generator shaft of a three-phase generator, wherein the three-phase generator can be connected to a power grid. The motor shaft of a second DC motor can also be connected with the generator shaft, and the electric energy produced by the photovoltaic modules is initially only used for driving a single DC motor and is during the subsequent operation divided between those DC motors. A battery is provided which can be connected with the second DC motor instead of the PV system by changing the excitation of the second DC motor such that it's motor voltage corresponds to the open-circuit voltage of the battery.
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