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Power conditioning unit

  • US 8,089,785 B2
  • Filed: 01/12/2007
  • Issued: 01/03/2012
  • Est. Priority Date: 01/13/2006
  • Status: Active Grant
First Claim
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1. A photovoltaic power conditioning unit for delivering power from a dc photovoltaic power source to an ac mains power supply, the photovoltaic power conditioning unit comprising:

  • an input for receiving power from said dc power source;

    an output for delivering ac power;

    an non-electrolytic energy storage capacitor;

    a dc-to-dc converter having an input connection coupled to said input and an output connection coupled to the energy storage capacitor;

    a dc-to-ac converter having an input connection coupled to said energy storage capacitor and an output connection coupled to said output; and

    a power injection control block configured to control an amount of power transferred from said dc-to-ac converter to said ac mains power supply based at least in part on an amplitude of a fluctuating sinusoidal component of a dc voltage on said energy storage capacitor.

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