Patent ID: 9423434
Filing Date: 2016-08-23
CPC Classification: G01R

Claim Text:
1. A method for measuring an electrical quantity in an electrical network including at least a substation, the method comprising: receiving, via at least two intelligent electronic devices, an input or measurement signal describing or corresponding the electrical quantity to be measured; measuring samples of the electrical quantity, via each of the at least two intelligent electronic devices, respectively at the different feeders or locations of the electrical network in turns at different feeders or locations one sample at a time and at different time instants such that after a sample of the electrical quantity is measured at a respective feeder or location and at a respective time instant, a next sample of the electrical quantity is measured at a different feeder or location at a next time instant, wherein the measuring of samples of the electrical quantity at other feeders or locations being idle at each time instant the electrical quantity is measured via a respective one of the at least two intelligent electronic devices at the respective feeder or location, creating, in one of the at least two intelligent electronic devices a value sequence on the basis of the measured samples, at least one individual value of the value sequence corresponding to a measured sample, or a value calculated on the basis of at least one measured sample, wherein the at least one individual value in the value sequence is arranged in an order corresponding to a chronological order of the measured samples; and performing, in one of the at least two intelligent electronic devices a transient analysis on the value sequence to determine a fault location in the electrical network, wherein a sampling frequency of the electrical quantity being measured in the network is multiplied by a total number of different feeders or locations at which a sample is measured.