Islanding a plurality of grid tied power converters
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United States of America Patent
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Nov 14, 2017
Grant Date -
Jan 5, 2017
app pub date -
Jun 29, 2016
filing date -
Jul 2, 2015
priority date (Note) -
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Abstract
A power system having a plurality of power converters coupled together at a point of common coupling (PCC). The power converters are coupled to a load and provide a combined power converter output to the load. A switch is coupled in series between the PCC and an external grid. When the switch is closed, the power system is in a grid-tied configuration and when the switch is open, the power system is in a microgrid configuration. A control system coupled to the power converters enables the switch to open and close in response to a signal received from one or more sensors monitoring the external grid, enables the power converters to operate in a current control mode when the switch is closed, and transitions the power converters from grid-tied mode to microgrid mode and synchronize the power converters such that the converters share the load.
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