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Improved zone 2 acceleration scheme using sound phase seen impedance

Moore, P.J. and Al-Nasseri, H. (2004) Improved zone 2 acceleration scheme using sound phase seen impedance. In: Eighth IEE International Conference on Developments in Power System Protection 2004, 2004-04-05 - 2004-04-08.

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Abstract

The acceleration of distance protection zone 2 schemes usually relies on the use of a communications channel. This paper describes a scheme capable of detecting the operation of the remote-end circuit breaker by analysing the seen impedance on sound phase elements in the relay. A series of simulation studies have shown that the technique works under a variety of system conditions. It proposed that the technique is used as a backup when the communications channel is unavailable.