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Methods and apparatuses for tracking maximum power point of solar electricity generating system

  • US 20050110454A1
  • Filed: 11/19/2004
  • Published: 05/26/2005
  • Est. Priority Date: 11/25/2003
  • Status: Abandoned Application
First Claim
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1. A method for tracking a maximum power point of a solar electricity generating system, wherein said system comprises a solar cell and a DC/AC converter electrically connected to said cell, comprising the steps of:

  • (a) providing an initial value of an output current amplitude of said converter;

    (b) sensing an initial value of an output voltage of said cell in response to said initial value of said output current amplitude;

    (c) providing a reference output current amplitude of said converter and allowing said system being operated under said reference output current amplitude for a specific time period;

    (d) sensing a output voltage of said cell in response to said reference output current amplitude;

    (e) comparing said output voltage with said initial value of said output voltage to generate a variation of said output voltage;

    (f) adjusting said reference output current amplitude in a direction of said variation and replacing said initial value of said output voltage by said reference output voltage; and

    (g) repeating said steps (c) to (f).

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