Abstract
In this article, a model of wind and ocean wave power generation-based microgrid (MG) system with diesel engine generator and battery storage system is developed. To replicate the more practical scenarios, various system non-linearities, as well as measurement time delay, are also incorporated in the designing of the considered MG system. The stochastic nature of wind and ocean, and load demands create an imbalance among sources and loads, which may lead to severe frequency fluctuation. To mitigate the effect of frequency fluctuations, an advanced fuzzy logic (FL)-based control method is proposed for load frequency regulation (LFR). The various variants of FL-based control schemes, such as fuzzy P, fuzzy P + I, fuzzy PI, cascaded fuzzy PI-PD, and fuzzy PID controllers, are designed and implemented for the LFR of the considered hybrid MG system (HMGS). A comparative analysis of HMGS with all designed and implemented controllers is performed for the identification of the suitable controller to alleviate the effect of frequency fluctuations. The obtained results show the effectiveness of the cascaded fuzzy PI-PD controller over the other designed controllers. Finally, the stability analysis of HMGS with proposed cascaded fuzzy PI-PD control approach is also performed.
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