Page 20 - Hybrid-Renewable Energy Systems in Microgrids

Hybrid PV–wind renewable energy sources for microgrid application: an overview 5

PV–wind–diesel, PV–wind–Battery energy storage system (BESS), and PV–wind–
diesel–BESS combinations, with/without power conversion system (PCS) as shown in
Figs. 1.3 and 1.4, originally drawn by the authors to demonstrate the potential hybrid
configuration. Nevertheless, detail structures/components and connection diagrams
may be different in an actual installation, depending on the rated capacity, materials,
and other technical constraints.
Adverse nature of Wind–PV systems can alleviate the intermittency nature of each
other and thereby improve the reliability of the hybrid system. However, in a grid-con-
nected MG operation, PV–wind combination might be useful to support the system by
providing clean energy. However, in a standalone MG, only PV–wind combination
cannot guarantee continuous energy supply over a 24-hour cycle. PV and wind might
be able to reduce the rapid fluctuations, but as nondispatchable energy sources, PV–
wind cannot participate in primary voltage and frequency control without an additional

Figure 1.3 Potential typical hybrid structures-1.

Figure 1.4 Potential typical hybrid structures-2.