Method and apparatus for anti-islanding of distributed power generation systems

  • US 20090021877A1
  • Filed: 07/16/2008
  • Published: 01/22/2009
  • Est. Priority Date: 07/16/2007
  • Status: Active Grant
First Claim
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1. Apparatus for converting DC power to AC power, comprising:

  • a phase locked loop (PLL);

    a phase shift generator for injecting a phase shift into the PLL during at least one sample period; and

    a phase error signature monitor for monitoring at least one phase error response of the PLL during the at least one sample period.

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