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New approach to power line protection based upon the detection of fault induced high frequency signals

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2 Author(s)
Johns, A.T. ; Power & Energy Syst. Res. Centre, City Univ., London, UK ; Agrawal, P.

The authors outline the salient features of a protection technique for transmission lines which utilises the high frequency components of fault generated noise. The approach is based on the nonunit type scheme, which makes use of a stack-tuner circuit connected to the coupling capacitor of a capacitor voltage transformer. The stack-tuner is tuned to a certain frequency bandwidth and is arranged to act as a high frequency switch. The signals derived from the stack-tuner are used to determine whether the fault is inside or outside the protected zone

Published in:
Generation, Transmission and Distribution, IEE Proceedings C  (Volume:137 ,  Issue: 4 )

Date of Publication: Jul 1990

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