Enhanced modeling and control of VSIs in microgrids operating in grid-connected mode

This paper focus on the influence of filter dynamics on the performance and stability of current control loops of three-phase, pulse-width modulation (PWM) voltage source inverters (VSIs) in grid-connected operating mode. The analysis considers the application of those devices in microgrids. Based on a detailed state-space model of VSIs and their companion filters, enhanced controller design techniques are applied in order to prevent the drawbacks of conventional microgrid control strategies. The effectiveness of the proposed control strategy is verified via computer simulations.

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