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Metering and protection system for an A.C. power system

  • US 4,300,182 A
  • Filed: 08/09/1979
  • Issued: 11/10/1981
  • Est. Priority Date: 08/09/1979
  • Status: Expired due to Term
First Claim
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1. A metering system for electronically metering an A.C. electrical power system of predetermined frequency to determine real and reactive power in the system, said metering system comprising:

  • voltage sensing means adapted to sense voltage in the power system, said voltage sensing means further adapted to provide an output signal proportional to said voltage;

    current sensing means adapted to sense current in the power system, said current sensing means further adapted to provide an output signal proportional to said current;

    first and second filtering means for separately sampling respective ones of said voltage and current output signals at least once during each period of said power system to develop respective Walsh function correlation coefficient output signals for each of said voltage and current output signals; and

    combining means for combining said Walsh function correlation coefficient output signals to determine real and reactive power parameters of the power system.

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