Islanded Microgrid Frequency Control in Presence of HVDC-Connected Marine Power Plant Coordinated with Optimal Fuzzy-PID and Hybrid Energy Storage Devices

This article purpose a new optimal dynamic frequency control of islanded microgrid including hybrid marine power plant and multiple energy storage devices feeding islanded loads through an High Voltage Direct Current link (HVDC). The used isolated microgrid incorporate a hybrid marine power generation. The marine power plant involves both offshore wind farm (OWF) and Wells turbines (WTs) to respectively capture wind energy and wave energy from wind and ocean wave. Moreover, a hybrid storage devices have been employed to avoid load shedding and improve the overall microgrid frequency dynamic performances. This Hybrid Energy Storage devices includes : Superconducting Magnetic Energy Storage (SMES), Redox Flow Batteries (RFBs), and Fuel Cells (FCs). The frequency was analyzed through the application of a new optimal Fuzzy-PID controller using the recently developed Water Cycle Algorithm (WCA). The WCA algorithm was employed to find the best values of fuzzy logic and PID controllers parameters. The main purpose was to develop and manage a hybrid marine power generation system which can meet the load needs with and without consideration of HESS. A comparative study has been carried out to show the robustness of the proposed method. It can be concluded from the simulation results that the proposed hybrid marine generator (HMG) OWF/WT coordinated with HESS and controlled via an optimal LFC loop can stably operate to achieve system stability.