Transient performance and stability analysis of a hybrid grid-connected wind/PV system

This paper presents both stability analyzed results and transient performance of a small hybrid wind/PV power generation system connected to a low-voltage distribution system. The studied system includes two identical wind cage-rotor induction generators, a PV module, a battery storage system, and a rectifier-inverter module. Both simulated and measured transient results of the studied system subject to disturbance conditions are examined and compared. The required minimum self-excited capacitance of the studied wind induction generators is also determined. Small-signal stability of the studied system under different rotor speeds is evaluated using eigenvalue approach. It can be concluded from the analyzed results that the proposed simulated model is adequate to simulate the performance of the studied practical hybrid grid-connected wind/PV system.