Abstract

Modern power system networks are highly complex systems due to the integration of hybrid renewable energy resources (RES). To operate hybrid RES-based systems in a stable operational mode, appropriate frequency control loops are required. It is critical to control the frequency and must be properly regulated in stochastic modern power systems. For this reason, primary and secondary frequency regulation control loops are utilized in this research. The secondary frequency regulation also called load frequency control (LFC) and maintains the desired level of frequency after a disturbance/imbalance in the grid system. This study also emphasizes major research gaps and presents novel research directions based on innovations, trends, key issues, and challenges of LFC. This study examines the various literature of frequency regulation strategies on renewable energy dominated power system in depth. The study investigates and classifies the existing LFC models for conventional power networks and renewable based multiarea power systems. In addition, the proposed LFC schemes are analyzed and classified into advanced control schemes.

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