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Ultra-high-speed directional protection of transmission lines using mathematical morphology

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3 Author(s)
Wu, Q.H. ; Dept. of Electr. Eng. & Electron., Liverpool Univ., UK ; Zhang, J.F. ; Zhang, D.J.

This paper presents a novel ultra-high-speed directional protection scheme developed using mathematical morphology (MM). The MM technique proposed is used to extract transient features from fault-generated voltage and current wave signals propagating along transmission lines during a post-fault period. Fault direction is determined by two composite relaying signals which are composed of the extracted transient features. A variety of fault scenarios has been simulated to evaluate the validity of the proposed scheme.

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Power Delivery, IEEE Transactions on  (Volume:18 ,  Issue: 4 )