Abstract
This work deals with the power management of a hybrid microgrid comprising photovoltaic array (PV), battery energy storage (ES), small hydroelectric generator (SH), and wind energy conversion system (WECS). The notion of AC/DC microgrid has emerged due to the progress in both AC and DC based distributed generators. The AC and the DC buses are adjoined using an interlinking converter for the bidirectional exchange of power. Coordinated control algorithms are developed for all the converters employed in the hybrid microgrid. Besides, the WECS is connected via static power electronic switches (SPES). Synchronization controller provides signals to the SPES. Maximum power point algorithms are used to extract maximum power from the WECS and solar PV array. Moreover, a filtered x affine projection Versoria (FxAPV) adaptive filter is employed to extract the elemental active part of the load currents to make DFIG stator and hydrogenerator currents harmonic free. The system voltage and frequency on the AC side are modulated using the interlinking converter whereas, the energy storage regulates the voltage on the DC side. Simulation is performed in MATLAB environment and performance of the system is illustrated in different modes.
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