Method and apparatus for maximum power point tracking in power conversion based on dual feedback loops and power ripples
First Claim
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1. An apparatus for converting DC input power to AC output power, comprising:
- a conversion module comprising an input capacitor;
a first feedback loop for determining a maximum power point (MPP) and operating the conversion module proximate the MPP; and
a second feedback loop for determining a difference in energy storage and delivery by the input capacitor, producing an error signal indicative of the difference, and coupling the error signal to the first feedback loop to adjust at least one operating parameter of the conversion module to drive toward the MPP.
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Abstract
A method and apparatus for converting DC input power to AC output power. The apparatus comprises a conversion module comprising an input capacitor, and a first feedback loop for determining a maximum power point (MPP) and operating the conversion module proximate the MPP. The apparatus additionally comprises a second feedback loop for determining a difference in energy storage and delivery by the input capacitor, producing an error signal indicative of the difference, and coupling the error signal to the first feedback loop to adjust at least one operating parameter of the conversion module to drive toward the MPP.
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Citations
17 Claims
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1. An apparatus for converting DC input power to AC output power, comprising:
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a conversion module comprising an input capacitor; a first feedback loop for determining a maximum power point (MPP) and operating the conversion module proximate the MPP; and a second feedback loop for determining a difference in energy storage and delivery by the input capacitor, producing an error signal indicative of the difference, and coupling the error signal to the first feedback loop to adjust at least one operating parameter of the conversion module to drive toward the MPP. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for converting DC input power to AC output power, comprising:
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determining a maximum power point (MPP); operating a conversion module proximate the MPP, wherein the steps of determining an MPP and operating a conversion module are implemented via a first feedback loop; determining a difference in energy storage and delivery within the conversion module; producing an error signal indicative of the difference; and coupling the error signal to the first feedback loop to adjust at least one operating parameter of the conversion module to drive toward the MPP, wherein the steps of determining a difference, producing an error signal, and coupling the error signal are implemented via a second feedback loop. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A system for converting DC input power to AC output power, comprising:
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at least one photovoltaic (PV) module; at least one conversion module comprising an input capacitor; at least one first feedback loop for determining a maximum power point (MPP) and operating the at least one conversion module proximate the MPP; and at least one second feedback loop for determining a difference in energy storage and delivery by the input capacitor, producing an error signal indicative of the difference, and coupling the error signal to the at least one first feedback loop to adjust at least one operating parameter of the at least one conversion module to drive toward the MPP. - View Dependent Claims (15, 16, 17)
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Specification