A transmission line two-end fault location approach based on mathematical morphology

This paper presents a fault location method for transmission lines. The proposed approach is based on voltage traveling waves sampled in both line terminals. A morphological filter called Simplified Multi-resolution Morphological Gradient (SMMG) is proposed. Because of its simplicity and low computational load, the SMMG is suitable for real time applications. The SMMG is used to detect the instant of arrival of the first wave front at the line terminals. Using these instants and the waves propagation speed, obtained from line parameters, the fault location is calculated. Tests based on a real transmission line show the robustness and the good precision of the proposed approach.