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Non-Standard Control Strategies for Regulating Power Flow of AC/DC Microgrid Integrated with Storage System
September 12, 2019 @ 5:30 PM - 8:00 PM
Co-sponsored by: Marcelo Simoes
Abstract –The modern organization of the power system based on ac microgrids allows the insertion of distributed generation (DG) feeding by renewable energy sources (RES). This new configuration demands the development of control strategies for improving the efficiency and reliability of these networks on power flow management. Among them, both the virtual synchronous generator (VSG) and virtual impedance (VI) concepts have gained increased interest in providing a suitable solution to interconnect the DGs to the power systems. The main characteristic of the VSG is the insertion of the virtual inertia implemented via controlled time delay inserted into the active and reactive power control loops. Regarding the VI, it can be employed to reduce the coupling between the active and reactive power flows in low voltage microgrids. DG based on RES is highly variable and stochastic and can cause voltage fluctuations or frequency deviations in ac-bus and voltage oscillations in dc-bus. In these systems, energy storage systems (ESS) are integrated into the DC-bus of DGs to address control flexibility and achieve reliable output power. Non-standard cooperative control strategies with adaptive resources have been demonstrated to be well-suited for regulating the power flow of the dc-bus of an ac/dc microgrids integrated to ESS can ensure the overall stability of the ac/dc microgrids.
Bldg: Marquez Hall
1500 Illinois St
Colorado School of Mines/Department of Electrical Engineering