Power conditioning unit with voltage converters
First Claim
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1. A power conditioning unit for delivering power from a dc power source to a mains utility supply, the power conditioning unit comprising:
- input connection means for connecting to the dc power source;
output connection means for connecting to the mains utility supply;
voltage increasing means for increasing a voltage supplied by the dc power source to the input connection means;
voltage reducing means for reducing a voltage supplied by the voltage increasing means;
dc-to-ac conversion means for converting a direct current supplied by the voltage reducing means to an alternating current suitable for supplying to the mains utility supply, wherein the voltage reducing means and the dc-to-ac conversion means share an inductor and wherein the inductor is configured to function as an energy storage inductor in the voltage reducing means and as a current smoothing inductor in the dc-to-ac conversion means;
voltage sensing means for sensing a voltage on the output connection means;
reference current generation means for generating a reference current responsive to said sensing;
current sensing means for sensing a supply current in the dc-to-ac conversion means; and
control means for controlling the voltage reducing means responsive to a difference between the reference current and the supply current.
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Abstract
A power conditioning unit for delivering power from a power source to a mains utility supply, the power conditioning unit comprising a plurality of input terminals for connecting to the power source, a plurality of output terminals for connecting to the mains utility supply, a voltage increasing converter connected to the input terminals, a voltage reducing converter connected to the voltage increasing converter and a dc-to-ac converter connected to the voltage reducing converter and to the output terminals.
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Citations
12 Claims
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1. A power conditioning unit for delivering power from a dc power source to a mains utility supply, the power conditioning unit comprising:
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input connection means for connecting to the dc power source; output connection means for connecting to the mains utility supply; voltage increasing means for increasing a voltage supplied by the dc power source to the input connection means; voltage reducing means for reducing a voltage supplied by the voltage increasing means; dc-to-ac conversion means for converting a direct current supplied by the voltage reducing means to an alternating current suitable for supplying to the mains utility supply, wherein the voltage reducing means and the dc-to-ac conversion means share an inductor and wherein the inductor is configured to function as an energy storage inductor in the voltage reducing means and as a current smoothing inductor in the dc-to-ac conversion means; voltage sensing means for sensing a voltage on the output connection means; reference current generation means for generating a reference current responsive to said sensing; current sensing means for sensing a supply current in the dc-to-ac conversion means; and control means for controlling the voltage reducing means responsive to a difference between the reference current and the supply current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification