Abstract:
The photovoltaic (PV) system is a highly popular renewable energy source due to its
energy-friendly environment. However, because of its high costs, it may result in difficulties in
development and experiments of laboratory photovoltaic converter systems.
This thesis was designed and based on a real time PV model. The design was divided into
two main parts. The first part was a mathematical modeling of a PV cell from SOLAREX MSX-60
series using MATLAB/Simulink program. It was utilized into a study of the characteristics of the
PV cell and the effects of any variables to the behavior of the PV itself. The second part was to
build a DC buck converter with a switching frequency of 5.5 kHz. The converter could provide a
suitable output voltage and current in practice according to a PV that modeled in the
MATLAB/Simulink program using a proper interfacing board, such as STM32F4.
This paper presented the simulation of PV panels in the current and output voltage caused
by changing of parameters such as ambient temperature, solar irradiance, etc. by using the
MATLAB/Simulink program. The solar cells were typically of non-linear behavior. The research
was conducted to analyze the solar system to create a simulation of practical in-time (Real-Time PV
Simulator) by applying DC converter (DC Buck Converter) with the property of a voltage source.
Therefore it is necessary to have a feedback control. Additionally, the model of the solar cell was
created using a mathematical equation to consider the electrical characteristics of the solar cell.
Then, it was examined how feedback control system model and characteristic of I-V curve altered
the ability to work effectively and closely to the reference of the I-V curve. The input method could
be applied to both methods of the PID controller.