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This paper proposes a new control algorithm for optimally reshaping distributed generation (DG) output impedance so that the system damping and bandwidth are maximized. Such impedance reshaping is essential for managing variations in grid impedance and changes in DG operating conditions. The proposed control algorithm involves two design stages. First, the multivariable DG output impedance is derived...
This paper demonstrates the generic models of different hybrid ac/dc microgrids components. The operational philosophy is oriented towards decentralized schemes while considering the absence of a single slack bus in the entire system. Instead, the DG units operate based on droop characteristics, thereby forming a multi-slack distribution system, and accordingly stabilize the system frequency and voltage...
Stability of inverter-based distributed generation units (DGs) is highly dependent on the ratio of DG impedance to grid impedance. To assess the system stability both DG and grid impedances should be known beforehand. This paper proposes a multivariable impedance model for droop-based DGs that are typically employed in microgrids. The proposed model is essential when assessing the microgrid stability...
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