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A new directional relay for the protection of EHV transmission lines using high frequency voltage transients

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4 Author(s)

This paper presents the application of a new directional relaying technique for the protection of EHV transmission lines using fault generated high frequency voltage transients. The technique utilises a specially designed transient detection unit to detect fault generated transient voltage signals. A multi-channel filter unit is then applied to the captured signals to extract the desired bands of signals. The filter outputs are then fed to a spectral energy circuit where their associated spectral energy levels are calculated. These levels can be compared to establish the direction of the fault

Published in:

Power System Technology, 1998. Proceedings. POWERCON '98. 1998 International Conference on  (Volume:2 )

Date of Conference:

18-21 Aug 1998