Grid-tied solar photovoltaic power system with dynamic grid power stabilization
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United States of America Patent
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Mar 13, 2018
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Nov 18, 2015
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Nov 18, 2015
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Abstract
The invention is an apparatus for and method of configuring a solar PV system where the output power of the system is stabilized under dynamic cloud cover conditions. The invention comprises a typical grid-tied solar photovoltaic power system which includes solar modules and a typical grid-tied DC to AC power converter and a second, semi-autonomous, bidirectional power converter coupled between the same electrical grid and storage batteries. The system also includes sensors and/or a communication link between the two power converters. The composite system acts to stabilize the amount of power into the grid by monitoring dynamic power reductions in PV power production and by supplying power from the storage batteries to the grid during a PV power dropout event, for a net smoothing of the amount of power injected into the grid over a wide range of dropout event durations.
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