Load Frequency Control for Renewable Energy Power System Based on Sliding Mode control with Hybrid Energy Storage

Due to frequency deviation caused by renewable energy, hybrid energy storage system and sliding mode controller are proposed for the interconnected power system with wind power. This article introduces the hybrid energy storage system composed of super-capacitor and battery energy storage system, its fast response characteristics are adjusted by frequency. In addition, the designed sliding mode control has strong robustness to the parameter uncertainty and system disturbance in the load frequency control compared with the traditional control. Finally, the simulations based on Matlab/ Simulink platform show that the proposed control strategy can reduce the system frequency deviation and improve the stability of the system, thus improve the economic performance of the renewable energy power system.