Renewable Energy Power System Load Frequency Control with Demand Response Based on Fractional Sliding Mode Control

A fractional order sliding mode load frequency control (LFC) strategy with demand response (DR) is proposed to overcome the significant frequency deviation caused by source and load disturbances in renewable energy power systems. Firstly, an interconnected power system that includes wind turbine generator (WTG) and DR is established. Then, the fractional order sliding mode algorithm is used to optimize the LFC, which can minimize frequency deviation, as well as suppressing chattering of frequency deviation and improving the robustness of the power system. In addition, DR and WTG are participated to reduce frequency deviation as the support frequency regulation devices. Finally, two different scenarios are designed and verified in Matlab/Simulink. The results show that the proposed control strategy can effectively reduce the frequency deviation and ensure the frequency stability of renewable the power system.