Influence of Inaccurate Medium Voltage Microgrid Synchronization on Synchronous Generators

Abstract

Microgrids allow for the continuous supply of customers during outages of the bulk power system. A challenging aspect of microgrid operation is the transition from islanded to grid-connected operation mode. When the voltages of the microgrid and the bulk power system are not aligned in the event of the microgrid reconnection, components can suffer heavy loadings. This work investigates these loadings for diesel synchronous generators in MV microgrids for various scenarios of angle, amplitude and frequency deviations of the voltage of both grids. The outcome is relevant to anticipate generator loadings and to enhance the synchronization control.