Grid Connected Wind-Hydro Hybrid System with Battery Energy Storage for Critical Load

In the grid connected network, it is especially difficult to support the critical load without uninterrupted power supply. The proposed Wind-Hydro hybrid system with battery energy storage is used to maintain the voltage profile and support the real and reactive power in the grid. The proposed system employing one squirrel cage induction generator driven by variable speed wind turbine and another squirrel cage induction generator driven by constant power hydro turbine feeding to the grid. The scheme can also be operated as stand-alone system in case of grid failure. The system is simulated in MATLAB/SIMULINK and results are presented for various types of linear, nonlinear, and dynamic loads and under varying wind speed conditions.