Abstract
Grid-connected inverter is the grid-connected interface of new energy, but in unbalanced power grid, there will be output power oscillation, current imbalance and other problems. Based on the mathematical model of Grid-connected inverter alpha beta stationary reference system, the generalized power reference compensation expressions of adjustable current imbalance and power fluctuation are derived, which suppresses the active-power oscillation, reactive-power oscillation and balanced current respectively. It is established to achieve the coordinate control of power and current, which enhances the operation performance of the system. Finally, the simulation results verify the effectiveness of the proposed control strategy.
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