Modeling and simulation of Photovoltaic/Wind Hybrid Electric Power System Interconnected with electrical utility

This paper focus in modeling and simulation of Photovoltaic/Wind Hybrid Electric Power System interconnected to the electrical utility, PV/Wind HEPS, taking into account all radiation, temperature, wind speeds and variation of the load demand during the day. A computer simulation program has been designed to simulate all quantities of HEPS such as phase voltage of the inverter leg and current in each IGBT´s for PV and WTG. It also simulates AC output current of the inverter that injected to the load/grid, load current, grid current, power output from PV and WTG, power delivered to or from grid and finally power factor of the inverter for PV, WTG and grid. The proposed computer simulation uses hysteresis current control and instantaneous p-q (real- imaginary) power theory. The computer simulation program is confirmed on a realistic circuit model which implemented in the Simulink environment of Matlab and works as if ON-line.