An Algorithm for Detection of Fault, Islanding, and Power Swings in DG-Equipped Radial Distribution Networks

Abstract

The algorithm proposed in this article is used for the detection of faults, islanding, and power swings generated within radial distribution systems either equipped or not equipped with distributed generation (DG). The algorithm benefits from the increasing numbers of phasor measurement units that are currently being deployed within modern-day electrical power networks. The algorithm computes three main indices used in the detection process based on the positive sequence measurements. Also, the algorithm has the ability to identify faults of high severity levels and send warning signals to the neighboring regions preventing possible maloperations and initiating emergency procedures. A modified IEEE 34-bus system that is equipped with DG is used for testing and validation of the algorithm employing MATLAB Simulink software packages. The proposed algorithm proved its reliability and robustness in operation even for severe faults and islanding cases.