Regulation of frequency in the wind plants integrated grid by H-infinity approach

Among different renewable energy sources wind energy system has a prominent role and a special concentration to be taken for integration into a conventional grid. The major issue with the integration of wind plant is its intermittency nature and the causing perplexities. If such a wind plant is integrated into a conventional grid besides load variations, these uncertainties caused by wind plant also introduced. As a result of above concerns greater imbalance takes place between power generated and the load demand, leading to enhancement of frequency variations and inertia of the entire system is decreasing. In general existing hydro-governor systems itself not consider the dynamics of other power components. Also the employed PID controller is not enough to address these issues. In order to pertain the robustness and stability of all dynamic systems considering the wind power variations, hydraulic system dynamics of hydro-electric plant, a robust controller is framed which reduces the order of the system model. To verify the performance of the designed robust controller, an IEEE-39 bus test system is use and the performance verification is done by using of MATLAB software.