Enhancing the Stability of an Autonomous Microgrid using DSTATCOM

ABSTRACT: This paper proposes a method for power sharing in autonomous microgrid with multiple distributed generators (DG). It is assumed that all the DGs are connected through volt-age source converter (VSC) and all connected loads are passive, making the microgrid totally inertia less. The VSCs are con-trolled by either state feedback or current feedback mode to achieve desired voltage-current or power outputs respectively. A modified angle droop is used for DG voltage reference genera-tion. Power sharing ratio of the proposed droop control is estab-lished through derivation and verified by simulation results. A distribution static compensator (DSTATCOM) is connected in the microgrid to provide ride through capability during power imbalance in the microgrid, thereby enhancing the system stabil-ity. This is established through extensive simulation studies using PSCAD