Modeling and intelligent control of a standalone PV-wind-diesel hybrid system

The aim of this thesis is to study the modelling and intelligent control of a stand-alone hybrid energy system based on solar-wind-diesel with battery. The renewable sources are major components of a standalone hybrid system as a combining photovoltaic with the wind turbine. Each component of these systems has been modeled and implemented in MATLAB/Simulink software. The proposed system is able to operate in standalone mode, without the need for connection to the main grid. The fluctuations in voltage and frequency of the system can be encountered depending on wind speed, solar irradiation and the temperature. Thus it can be observed the decrease in power quality in such systems which operate in standalone. This condition can even go worse when varying loads are considered. In order to improve power quality and reduce unwanted fluctuations of system quantities under different operating conditions an intelligent control is designed in this work. The capabilities of this designed intelligent control system on the control of voltage and frequency of the system are tested under different operating conditions and compared to PID controllers. The superiority of the designed intelligent control system over PID controllers is shown by the simulation studies.