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METHOD AND APPARATUS FOR TESTING THE OPERATING CONDITIONS OF AN ELECTRIC NETWORK

  • US 20090222227A1
  • Filed: 02/19/2009
  • Published: 09/03/2009
  • Est. Priority Date: 02/21/2008
  • Status: Active Grant
First Claim
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1. A method for testing the operating conditions of an electric network, conditions including at least one operating state, the electric network having at least one load, the method comprising the steps of:

  • providing a voltage signal to said the load,measuring the instantaneous current signal circulating in the load,delaying the instantaneous current signal to generate an instantaneous current signal delayed by a predetermined amount of time, the predetermined amount of time being a function of the operating state of said load,calculating, within a predetermined measurement time, an admittance ratio between the mean of the product of the voltage signal and the delayed instantaneous current signal, and the mean of the square of said voltage signal,comparing the value of said admittance ratio with a range of predetermined values to determine the at least one operating state of the electric network.

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