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Apparatus and method for power disturbance analysis and storage of power quality information

  • US 5,899,960 A
  • Filed: 08/21/1996
  • Issued: 05/04/1999
  • Est. Priority Date: 05/19/1994
  • Status: Expired due to Term
First Claim
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1. A method for monitoring power disturbances in a three-phase power system:

  • simultaneously sampling at least three voltage measurements and at least three current measurements in a periodic fashion to obtain a plurality of sequences of analog samples, wherein said voltage measurements and current measurements are made on three power signals corresponding to each of three phases of the three-phase power system;

    digitizing said plurality of sequences of analog samples to obtain sequences of digital samples;

    converting said sequences of digital samples to frequency domain representations;

    determining power quality information from said frequency domain representations; and

    storing said power quality information.

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