Reconnection of the islanded portion of the CIGRE low voltage distribution network

Islanding is phenomena in which a part of the distribution grid is electrically disconnected from the main transmission system. Islanded operation is encouraged in order to operate the electrical power networks in reliable manners. However, the reliability of the small networks operating is island is less as compared to that of the grid connected system. The islanded portion of the distribution network can be reconnected to the transmission grid if the voltage magnitudes, voltage phase angles and the frequencies of the two systems are synchronized. The main objective of this paper is to facilitate the reconnection of the islanded portion of the network to the transmission grid. The results are presented by using DIgSILENT software version 15.0.