Research on AC Interface Topology Control Strategy of Multi-port Energy Router
Multi-port energy router is suitable for low-voltage and high-power occasions.Its AC interface adopts T-type three-level converter,which can be connected to AC power grid,AC load and new energy power field and DC bus.In this paper,based on the analysis of the basic working principle and mathematical model of the topology,the double closed-loop current control strategy is derived,which is respectively the inductive current control in the pow-er supply side of the LCL filter and the capacitor current control in the LCL filter.The capacitive current control ring is the inner ring,and the inductive current control on the power side is the outer ring.Since the reference value of inductance current at the power supply side is sinusoidal signal,a quasi-proportional resonant controller rather than a PI controller is adopted to consider the frequency fluctuation of the power network.The design method of the controller parameters and the feedback coefficient of the capacitor current inner loop is also given.Finally,a simu-lation model is built in Matlab/simulink,and the simulation results show that the T-type three-level converter and control strategy can meet the requirements of the output power quality of the multi-port energy router.
multi-port energy routerT-type three-level converterquasi-proportional resonant controller
万方数据
维普
