Week 2:

The whole structure of the voltage generator part:

structure of the voltage generator

Our group began doing the first part of the subsystem, the output voltage of PV cell by using the Matlab Simulink. It was quit easy for the group to finished building the first part of the subsystem after mastering some of the skills of Simulink by reading the materials of system functions and Simulink. In this material, it shows how the Simulink worked and how the is the connection of each small system. And also, it has a brief introduction of how to program basic system function, which will used in the experiment for some complex formula. In addition, all the steps were followed in the lab script which the supervisor provided for the group. In this script, the figures of some of the subsystem were provided which helped the group know the theory of the subsystem. The following graph is the theory of the PV cell unit model:

PV cell system

Because the first part of the subsystem was finished quicker than the plan, the group continued to the second part of the subsystem. Which was the temperature and solar irradiation effect of the output system. The output voltage of the PV cell will be affected by the solar irradiation level Sc and the operating temperature Tc. The formula which represent the output voltage affect by the Sc and Tc is V_PV =  C_TV * C_SV * Vc and Iphx = I_TV * I_SV * Iph.  In this weeks office time, the subsystems were shown to the teachers and the only question was about the differences of dot plus and x plus. The following graph shows the Simulink Modeling of the PV unit cell and temperature & solar irradiation part.

temperature & solar irradiation