Abstract
Aiming at the poor waveform quality of the new energy grid connected under the traditional PI control strategy, based on the theory of repetitive control method, a compound control trategy is proposed. Through the analysis of the compound control module and simulation, the results show that grid harmonic distortion rate can be reduced about 2% at the same nonlinear load, the compound control strategy can suppress the load disturbance signal effectively, and the simulation results demonstrate the effectiveness of the proposed method.
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