Patent ID: 8269503

Claim:
A method for locating a fault on an electrical network energized by a source, the method comprising the steps of: measuring voltages at three or more different measurement locations on the electrical network; determining voltage phasors corresponding to the voltages measured during the fault, the voltage phasors being time synchronized; evaluating a fault current as a function of the voltage phasors at two of the measurement locations situated upstream from the fault and an impedance of the electrical network between the two of the measurement locations; and evaluating a position of the fault on the electrical network corresponding to a point of the electrical network where the following intersect with each other: (i) a voltage drop phasor defined as a function of: the fault current, an impedance between the point of the electrical network and one of the two measurement locations, and the voltage phasor at one of the two measurement locations; and (ii) a reference axis coinciding with a phasor corresponding to the fault current.