Voltage Variation Analysis in Interconnected Electrical Network - Distributed Generation

The utility operation could be significantly enhanced when distributed generation (DG) systems are interconnected with the grid. During peak hours and emergency situations, some of the customers load can be transferred to an isolated generator, relieving the utility of the burden of supplying that load. Furthermore, isolated DGs are more flexible when operating in parallel with the grid. However, utility networks were generally not designed for the connection of generators. So many technical issues must be considered when connecting a generating scheme to the distribution system. This paper presents power transfer study, line voltage profiles and steady state voltage variation when generators operating in different modes, are connected to the utility grid. Theoretical analysis is provided and validated by computer simulation.