Page 36 - Hybrid-Renewable Energy Systems in Microgrids

20 Hybrid-Renewable Energy Systems in Microgrids

to avoid long-term outage from network failure. Moreover, MG is also widely popular
to provide electricity in rural areas where a considerable number of people are without
electricity. Considering the availability and technological advancement, PV and wind
become the most preferable energy sources to form a hybrid RES-based MG. Although
PV and wind hybrid configuration provides more degree of operational stability in
terms of fluctuation reductions from the renewable systems, battery storage system and
diesel generator are yet the indispensable support needed to ensure the reliability and
operational stability of the system. Optimization of the hybrid system, including the
storage system or the auxiliary generation source (i.e., diesel), ensures the technoeco-
nomic operation of the system. However, technoeconomic optimization is largely reliant
on the accurate wind and irradiance predictions and consistency in the average wind
speed and solar irradiance.
This study highlighted the benefits of PV–wind hybrid combination, optimization
techniques for hybrid RES, ESSs, and stability concerns related to the hybrid energy
system in existing literature. A simulation study is also carried out to visualize the
impact of PV and wind hybrid arrangement in case of transient disturbance scenario.
The HRES can be integrated in grid-connected mode with higher rating of PV and
wind farm. In addition, the stability issues related to the dynamic and transient distur-
bances will be considered in future work. In addition, power electronic based FACTS
(Flexible Alternating Current Transmission System) devices may be incorporated to
enhance the grid-connected HRES system stability under the disturbance conditions.

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