Abstract
The present work addresses the modelling, control, and simulation of a microgrid integrated wind power system with Doubly Fed Induction Generator (DFIG) using a hybrid energy storage system. In order to improve the quality of the waveforms (voltages and currents) supplied to the grid, instead of a two level-inverter, the rotor of the DFIG is supplied using a three-level inverter. A new adaptive algorithm based on combined Direct Reactive Power Control (DRPC) and fuzzy logic controls techniques is applied to the proposed topology. In this work, two topologies are proposed. In the first one, the active power injected into the grid is smoothened by using an economical hybrid battery and supercapacitor energy storage system. However, in the second one, the excess wind energy is used to produce and store the hydrogen, and then a solid oxide fuel cell system (SOFC) is utilized to regenerate electricity by using the stored hydrogen when there is not enough wind energy. To avoid overcharging, deep discharging of batteries, to mitigate fluctuations due to wind speed variations, and to fulfil the requirement of the load profile, a power management algorithm is implemented. This algorithm ensures smooth output power in the first topology and service continuity in the second. The modelling and simulation results are presented and analysed using Matlab/Simulink.
Highlights
The proposed combined hybrid Energy Storage Systems (EESSs) and Wind Turbine (WT)-Doubly Fed Induction Generator (DFIG) is connected to the micro-grid
This association can be used as an uninterruptible power supply when the micro-grid is disconnected, wherein the WT-DFIG generation is maximized or kept constant through the used Maximum Power Point Tracking (MPPT) and pitch angle control, depending on the presented situation
The simulation results of the proposed energy management system are performed under Matlab/Simulink, and the used parameters can be found in Table 3 [22,42]
Summary
The application of the DRPC technique for a multilevel inverter rotor-powered DFIG associated with hybrid energy storage systems has not been treated in the literature, especially when taking into account the random nature of wind and its sudden changes This paper demonstrates this system’s performance and robustness, taking into account the random nature of wind and the variable profile of the required active-reactive energies. In the first one (Figure 1a), the active power injected into the grid can be smoothened by using an economical hybrid battery and super capacitor energy storage system This topology can be perfectly adapted as an economic and ecological solution to the needs of agricultural and livestock farms.
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