| 摘要 |
The present invention relates to a method for testing the operating conditions of an electric network (EN), said conditions comprising at least one operating state, said electric network (EN) comprising at least one load (L), said method comprising the steps of providing a voltage signal (v(t)) to said load (L) and measuring the instantaneous current signal (i(t)) circulating in said load (L). The method is characterized in that it delays the instantaneous current signal (i(t)) to generate an instantaneous current signal delayed ((i(t+Ä)) by a predetermined amount of time (Ä), said predetermined amount of time (Ä) being a function of the operating state of said load (L). Furthermore, the method includes the steps of calculating, within a predetermined measurement time (Tm), an admittance ratio (GÇ(Ä)) between: the mean of the product of the voltage signal (v(t)) and the delayed instantaneous current signal (i(t+Ä)), and the mean of the square of the voltage signal (v(t)), to compare the value of said admittance ratio (GÇ(Ä)) with a range of predetermined values (Gmin,Gmax) to determine the operating state of the electric network (EN).
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