Modeling and analysis of a standalone hybrid green microgrid system

This chapter presents a hybrid standalone microgrid (HSMG) under varying sources and different load conditions. HSMG system consists of the photovoltaic (PV), wind, battery, and AC loads associated with a DC–DC converter, a voltage source inverter (VSI), and LC filters. The DC–DC converter provides the constant DC link voltage and then it is converted to the DC–AC three-phase output voltages with the help of a VSI. The generation-side converter is implemented to obtain the maximum power by a properly designed maximum power point tracking algorithm. In this work, three sources such as PV, wind, and battery outputs are converted into constant DC voltage with the suitable converters and inverters. To obtain the maximum output from these converters, they are controlled with sliding mode controllers by providing appropriate pulse width modulation pulses. Also, the output side inverters are controlled with SMC for supplying the desirable AC voltage and frequency to the AC loads which are supplied by the microgrid. The multiple case studies such as (a) source variations alone, (b) load variations alone, and (c) both source and load variation together are tested. The obtained results indicate that the SMC performs well under all conditions with good performance and is more suitable for the real-time applications.