Model-based Disturbance Rejection for Current Control of Bidirectional Single-Phase AC/DC Converters Used in Household Energy Router

In household energy router (HER), the bidirectional AC/DC converter is a core component between AC and DC sides; it plays an important part in system stable operation and power allocation. A new closed-loop power control strategy for a bidirectional AC/DC converters used in HER is presented in this paper The Phase Locking Loop based on Second-Order Generalized Integrator (SOGI-PLL) was chosen to generate an orthogonal signal from single-phase vector. A model-based perturbance rejection (MPR) method for current control is proposed to suppress perturbance and achieve precise reference tracking. Compared with traditional current control method in synchronous reference frame, the proposed current control structure can decouple perturbance rejection and reference tracking function, thus makes it convenient to design involved controllers respectively. The proposed control system enables the bidirectional AC/DC converter to have a better performance. Finally, the superior performance of the proposed control system was verified by simulation and experimental results.