High-phase order power transmission lines relaying approach based on the wavelet analysis of the fault generated traveling waves

This paper introduces a high-speed relaying approach based on the wavelet analysis of the fault generated traveling waves dedicated for high-phase order power transmission lines. In this approach, a suitable wavelet is chosen and tuned at a suitable band of frequencies to capture the fault generated high frequency traveling waves superimposed on the power frequency waves in a modal domain. Then, the energies of the captured signals are used for making a trip decision. The introduced approach is tested and validated by a computer simulation using an ElectroMagnetic Transient Program (EMTDC). The results show that the approach has the ability for high-speed fault detection, classification and faulted phase(s) selection irrespective of the fault inception angle, fault resistance and line terminals.