A impedance-based fault location technique for unbalanced distributed generation systems

This paper presents an analytical method for fault location in unbalanced distribution systems with the presence of distributed generation. In recent years, distributed generation has become an efficient and economical energy production. However, the high penetration of distributed generators change the nature of the electric power distribution systems, passive networks with a single direction of power flow for active networks, with a power flow in various directions. Thus, the presence of generators in distribution systems affect the accuracy of impedance-based fault location methods. This method proposes the extension of a mathematical formulation based on the apparent impedance in order to make it suitable for unbalanced systems.