Stability Analysis of Grid Integrated BESS Based Hybrid Photovoltaic (PV) and Wind Power Generation

Sustainable renewable energies are now increasing abruptly and received considerable attention worldwide. Sun and wind power are the two most common form of renewable energy resources. Solar irradiance and wind speed are fluctuating unconditionally, which creates a major challenge in grid integration. In this paper, grid integrated battery energy storage station-based hybrid photovoltaic and wind power generating hybrid power plant has been designed to examine the behavior of the system stability and the impacts on the system for different fault conditions. It contains PV, BESS, WT, DFIG, MPPT, PID, converters and controllers. Maximum peak power technique incremental conductance algorithm is used to extract the maximum power output from photovoltaic cells. BESS is used to produced constant output power from PV array at fluctuating irradiance. PID controller is used to wield duty cycles for battery charge and discharge controller. Wind turbine with doubly-fed induction generator (DFIG) is used. The simulation studies are carried out with MATLAB/Simulink. This paper shows a smooth and stable execution of BESS based hybrid PV-WT power system under different operating conditions and obtained nearly constant output power. PV and WT affected the transient stability of the system for a very short period.