Method of locating the position of a fault on a power...

Details Method of locating the position of a fault on a power... Method of locating the position of a fault on a power...

G - Physics

01

R

G01R 31/08 (2006.01)

Patent

CA 2140381

A method of locating the position of a fault on a power transmission line between first and second ends of the line comprising: calculating the complex fault impedance at each of a plurality of assumed fault positions along the length of the line, the fault impedance at each assumed position being calculated utilising the measurement before and after fault occurrence of the voltage and current at the first end of the line, parameters of the line, and the impedance at the second end of the line; and selecting as the actual fault position the assumed fault position of the plurality of assumed fault positions for which the argument of the complex fault impedance most closely equals zero. The method may be used with single or multi-phase power transmission lines. There is also disclosed a method of determining the form of impedance network at a fault on a multi-phase power transmission line.

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