Backstepping control strategy for multi-source energy system based flying capacitor inverter and PMSG

In this paper, renewable photovoltaic (PV) and wind turbine (WT) generators with battery are coupled via a flying capacitor inverter to a power grid in parallel with an alternating load. This paper studies a new control structure focused a backstepping control of the energy storage system. The proposed methods to adjust the active and reactive power by adjusting the currents, the DC bus voltage on the grid side converter, as well as the battery voltage allow three selective control targets to be achieved, the objective is to obtain purely sinusoidal signals and symmetrical gate current, suppresses reactive power ripples and cancels active power ripples in the event of grid imbalance. In order to optimize the power flow in the different parts of the production process, an energy management algorithm is developed in order to mitigate the fluctuations of the load, the considered multi-sources on-grid system was implemented in the Matlab/Simulink, the results show the effectiveness of the proposed method. To analyze our approach, a prototype is modeled, simulated and can be realized in an experimental test setup.