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Systems and methods for asynchronous sampling data conversion

  • US 8,373,309 B2
  • Filed: 09/04/2009
  • Issued: 02/12/2013
  • Est. Priority Date: 08/19/2009
  • Status: Active Grant
First Claim
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1. A method for selectively connecting a first electrical system and a second electrical system, the method comprising:

  • sampling a first alternating electric current of the first electrical system including a generator and having a first frequency at a sampling frequency to obtain a first set of data samples, the sampling frequency corresponding to a system frequency of the first electrical system or the second electrical system multiplied by a sampling rate;

    sampling a second alternating electric current of the second electrical system including an interne and having a second frequency at the sampling frequency to obtain a second set of data samples;

    converting at least one of the first set of data samples and the second set of data samples to a converted set of data samples using a conversion algorithm to compensate for a frequency difference between the first frequency and the second frequency;

    determining when the converted set of data samples and at least one of the first set of data samples and the second set of data samples satisfy a predetermined condition; and

    actuating a breaker when the predetermined condition is satisfied to selectively connect together the first electrical system and the second electrical system.

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