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Positional protection of transmission line using fault generated high frequency transient signals

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3 Author(s)
Bo, Z.Q. ; ALSTOM Protection & Control Ltd., UK ; Redfern, M.A. ; Weller, G.C.

This paper presents a new technique for high-speed protection of transmission lines, the positional protection technique. The technique uses a fault transient detector unit at the relaying point to capture fault generated high frequency transient signals contained in the primary currents. The decision to trip is based on the relative arrival times of these high frequency components as they propagate through the system. Extensive simulation studies of technique were carried out to examine the response to different power system and fault conditions. Results show that the scheme is insensitive to fault type, fault resistance, fault inception angle and system source configuration, and that it is able to offer both very high accuracy and speed in fault detection

Published in:

Power Delivery, IEEE Transactions on  (Volume:15 ,  Issue: 3 )

Date of Publication:

Jul 2000

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