Abstract
Droop-controlled inverter can operate in both islanded and grid-connected mode without reconfiguring the control structure, which can achieve a seamless transfer between both modes. The traditional double-loop structure based on proportional resonant controller is usually utilized to regulate a drooped voltage across local loads or inject power to the grid, but the dynamic process of load variation and mode transfer can hardly be satisfied. To solve this issue, a based super-twisting algorithm double-loop has been proposed here, which not only improve the dynamic process of mode transfer, but is also robust to the system parameters mismatch. Simulation and experimental results validate the correctness and feasibility of the proposed method.
Published Version
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