STARTUP SOURCE INVERTER
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United States of America Patent
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Issued Date -
Dec 23, 2010
app pub date -
Jun 18, 2010
filing date -
Jun 18, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method and an apparatus for setting up synchronization, with a power grid, of an inverter having a photovoltaic generator as a primary energy source is disclosed. The inverter is supplied with the energy from an additional energy source connected in parallel with input terminals of the inverter, wherein the additional energy source is a DC energy source operated independent from the primary energy source. The frequency, phase relationship and output voltage of the inverter supplied from the additional DC energy source are matched to the frequency, phase relationship and output voltage of the power grid, whereafter the primary energy source is connected to the inverter. With this method, an inverter dimensioned for a permissible open-circuit voltage can also be used under operating conditions, without requiring modifications of the circuitry of the primary energy source.
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