Abstract
Virtual synchronous generator (VSG) control algorithm can simulate the characteristics of the traditional synchronous generator, inverter with control can provide the voltage and frequency support for large power grid, and the corresponding inertia and damping characteristics, improving the stability of large power grid. Aiming at the problem of multi inverter parallel circulation suppression, the island micro grid under the virtual synchronous generator (VSG) based on double closed-loop control strategy of virtual impedance, VSG parallel system simulation model built two units of the same capacity, the virtual impedance to suppress the circulation, the simulation results show that the proposed control strategy of circulation.
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