Grid tied inverter, system and method including a buck-boost mode
First Claim
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1. A grid tied inverter connectable to an electricity grid, the grid tied inverter comprising:
- a DC to DC current fed push-pull converter operable to generate a current waveform from a DC voltage source, the current waveform being substantially synchronised to the electricity grid, and including a transformer; and
a circuit having a first side connected to the DC to DC current fed converter and a second side having an output line connected to the grid, whereinthe DC to DC current fed converter comprises a buck-boost stage connected to the DC voltage source, wherein the buck-boost stage is active only during generation of a lower portion of a voltage waveform at the output line.
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Abstract
A grid tied inverter connectable to an electricity grid, the grid tied inverter comprising a DC to DC current fed push-pull converter operable to generate a current waveform from a DC voltage source, the current waveform being substantially synchronised to the electricity grid, and a transformer having a first side connected to the DC to DC current fed converter and a second side having an output line connectable to the grid.
9 Citations
16 Claims
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1. A grid tied inverter connectable to an electricity grid, the grid tied inverter comprising:
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a DC to DC current fed push-pull converter operable to generate a current waveform from a DC voltage source, the current waveform being substantially synchronised to the electricity grid, and including a transformer; and a circuit having a first side connected to the DC to DC current fed converter and a second side having an output line connected to the grid, wherein the DC to DC current fed converter comprises a buck-boost stage connected to the DC voltage source, wherein the buck-boost stage is active only during generation of a lower portion of a voltage waveform at the output line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of controlling a grid tied inverter connectable to an electricity grid, the grid tied inverter comprising a DC to DC current fed push-pull converter including a transformer and a circuit having a first side connected to the DC to DC current fed converter and a second side having an output line connected to the grid, and the method comprising:
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generating a current waveform from a DC voltage source, the current waveform being substantially synchronised to the electricity grid, wherein the DC to DC current fed converter comprises a buck-boost stage connected to the DC voltage source, wherein the buck-boost stage is active only during generation of a lower portion of a voltage waveform at the output line. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification