Research and Implementation of Single-phase AC Electronic Load Based on Quasi-PR Control

Aiming at reducing the waste of electric energy by traditional electronic load, this paper studies the feed-back single-phase AC electronic load which can effectively reuse the electric energy to achieve the energy reutilization. Based on the “back to back” H-bridge with fully controlled devices, the basic working principle of the whole system is analyzed. The deficiency of traditional PI control algorithm and the advantage of quasi-PR algorithm are studied. In the MATLAB simulation, the PR control algorithm on the control effect is verified and analyzed. The PI and the quasi-PR control algorithm are combined and applied in this paper. The simulation and experimental results verify the feasibility of the control strategy.