Method and apparatus for increased energy harvest in a microgrid
AssigneeEnphase Energy, Inc.
InventorsChristopher Rowe, Donald Richard Zimmanck, Michael J. Harrison, Martin Fornage
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Abstract
A method and apparatus for power converter current control. In one embodiment, the method comprises controlling an instantaneous current generated by a power converter that is part of an AC battery such that the power converter appears, from the perspective of an AC line coupled to the power converter, as a virtual AC voltage source in series with a virtual impedance, wherein real and reactive phasor currents for the power converter are indirectly controlled by modifying amplitude and phase of a virtual AC voltage waveform that defines the virtual AC voltage source.
Claims20
A method for power converter current control, comprising:
- controlling an instantaneous current generated by a power converter that is part of an AC battery such that the power converter appears, from the perspective of an AC line coupled to the power converter, as a virtual AC voltage source in series with a virtual impedance, wherein real and reactive phasor currents for the power converter are indirectly controlled by modifying amplitude and phase of a virtual AC voltage waveform that defines the virtual AC voltage source.
An apparatus for power converter current control, comprising:
- a controller for controlling an instantaneous current generated by a power converter that is part of an AC battery such that the power converter appears, from the perspective of an AC line coupled to the power converter, as a virtual AC voltage source in series with a virtual impedance, wherein real and reactive phasor currents for the power converter are indirectly controlled by modifying amplitude and phase of a virtual AC voltage waveform that defines the virtual AC voltage source.
A system for generating power, comprising:
- an AC battery, comprising:
- an energy storage device;
- and
- a power converter that is bidirectional, coupled to an AC line and coupled to the energy storage device for storing energy when operating in a charge mode, wherein the power converter comprises a controller for controlling an instantaneous current generated by the power converter such that the power converter appears, from the perspective of the AC line coupled to the power converter, as a virtual AC voltage source in series with a virtual impedance, wherein real and reactive phasor currents for the power converter are indirectly controlled by modifying amplitude and phase of a virtual AC voltage waveform that defines the virtual AC voltage source.
Dependencies are inferred from the claim text.