Research on Harmonic elimination Feedback Control Technology of Sine Wave Inverter Based on Instantaneous Reactive Power Theory

Abstract

Aiming at more and more occasions where the sine wave output inverter is used for power supply of a non-linear load, the sine wave output waveform distortion of the inverter caused by the non-linear load is serious. The feedback control strategy of sine wave inverter based on instantaneous reactive power is proposed. Through the fundamental wave instantaneous tracking feedback control based on the instantaneous reactive power theory and the detection and feedback control of the output harmonic signal, this paper realizes the ability of the inverter to maintain the output waveform with high sine degree and low distortion under various load conditions, it guarantees the error-free control of the fundamental wave and has a good dynamic response performance. This solution has the advantages of easy controller stability design and good implementability. The simulation circuit is built by Matlab / Smiulink, and the correctness of the theory is verified by the simulation results.