Method and a device for fault location in the event of a...

Details Method and a device for fault location in the event of a... Method and a device for fault location in the event of a...

G - Physics

01

R

324/58.03

G01R 31/08 (2006.01)

Patent

CA 1316214

ABSTRACT OF THE DISCLOSURE: The present invention comprises a method and a device for fault location in case of a fault appearing on a power line between two stations (P, Q) and when capacitive measuring transformers are used for voltage measurement. The fault location is per- formed on the basis of a distance protection equation in which the voltage measured at the measuring station, in addition to the voltage drop (UPF) across that part of the line which lies between the measuring station and the fault location (F) and the voltage drop across the fault resistance, also comprises a voltage which represents the measurement error voltage which is introduced by the capacitive voltage measuring transformer. The equation is solved with the aid of linear regression tech- nique. With knowledge of the impedance (ZPQ) of the faultless line and the current in question, the fault position (? = 0 - 1) is determined.

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