基于模型预测控制的二次谐波注入：单相逆变器直流链路脉动的抑制

A model predictive control-based second harmonic injection (MPC-SHI) method is proposed in this article to attenuate the dc side second pulsation for the single-phase inverter. The directly calculated second harmonic injection (SHI) component is configured as the tracking reference and regulated by the model predictive control (MPC) with improved dynamic performance. The combination of MPC and SHI enhances the transient behavior with less response time and oscillation. Compared with the conventional methods, no extra notch filter or band-pass filters are needed to deal with the second order harmonics in the control process. The control bandwidth is increased with more tuning flexibility and better dynamic performance. No extra passive or active components are needed to attenuate the dc side second pulsation. The cost is largely saved accordingly. The experimental results have validated the proposed method.