Abstract
Six-phase power transmission has many advantages over three-phase transmission but the additional three phases complicate the fault analysis and the required protection. This paper introduces a wavelet-based protection approach for high-speed six-phase power transmission lines relaying. The approach is based on capturing the fault induced high frequency transients, superimposed on the power frequency currents, at a certain band of frequency. The transient energies of the captured signals are then determined and used for fault detection, classification and faulted phase(s) selection. Simulation studies show that the introduced approach is insensitive for the fault inception angle, fault resistance, and system source configuration.
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