State of the Art Review of Islanding Detection Methods for Integrated Distributed Generation System

Renewable energy technologies (RET) are expanding over the globe to fulfill the world's overall energy requirement. The main issue following the adoption of RET into power system network is an electrical islanding. It causes voltage, frequency, current, phase angle, power and harmonic content deviation outside the allowable limits, which may be hazardous to both connected apparatus and customers. It should be noticed within 2 s, according to Distributed Generation (DG) IEEE 1547 interconnection specifications. This research examines several islanding recognition strategies for improving the solidity of utility-connected DG. It will assist potential scholars in choosing the optimum islanding recognition technique with less non-detection zone (NDZ). The comparative assessment of various detection parameters analyzed in terms of NDZ, power quality issues and number of DG networks used. Finally, the sensitivity analysis of twenty passive methods carried out for low power mismatch cases like load switching and different fault cases, and the best methods for future islanding detection are recommended.