Abstract

In this paper a control strategy for the power management in an isolated micro hydro-PV-battery based hybrid renewable energy system is presented. The overall control strategy consists of two level control structures. The top level control structure determines the various reference powers for the various components and the device level controller acts according to the top level controller. The top level controller also controls the load in order to avoid systems blackout in case of insufficient power generation and storage power. The overall control strategy ensures that the system power flow at different time is balanced between the supply and demand. The proposed control strategy is implemented in MATLAB/Simulink software and is tested under different solar radiation, water flow rate and load demand.

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