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The paper discusses implementation issues related to the control of a three-phase grid-inverter for a wind-turbine system (WTS). The grid-side converter is controlled in order to maintain constant the DC voltage also in presence of grid voltage variations and the sinusoidal currents in phase with the corresponding voltages. PI and P+Resonat controllers are considered. For the P+Resonant controller...
Based on a three-phase PV grid-connected inverter with LCL filter, a two-current-loop control strategy which utilizes the grid-current as the outer-loop variable and filter-capacitor current as the inner-loop is adopted. Since the decoupling of the LCL filter is too complicate under dq coordinates, a PR controller is adopted in the outer loop under alphaszlig coordinates to avoid the complicated decoupling...
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