Matlab simulink modeling of photovoltaic cells for understanding shadow effect

Irradiation is the main component for producing the electricity from solar energy. When obstacles come in between the sun and the PV cell then it doesn’t get sufficient irradiance to produce enough electricity. Shadowing has a great impact on photovoltaic cell. The main fuel of PV cell is solar radiation. Using solar radiation, a photovoltaic cell produces electricity. The shadow on a PV cell decreases the output of the photovoltaic cell. It has been already shown in different papers that shadow effect decreases the output of the PV cell. There are different kinds of shadow effects which are observed, some minimize the PV cell output and some reduce the output to zero. There are different types of shadow based on their effects on the photovoltaic cell. The shadow has also effects depending on whether the PV cells are connected in series connection or in parallel connection. In series when one cell is out of order then the whole series of the PV cells will not work but in parallel connection if one cell is damaged, the others will work because they work independently. According to the output requirement the arrangement of the PV cells are made in series or parallel. Simulink modeling is made for series and parallel connection between two PV cells and the shadow effect is analyzed on one of the PV cells. Using SIMULINK, the shadowing is simulated on the two PV cells, where in one system they are in series and in another system they are in parallel. Slowly the irradiance is decreased to simulate the shadow effect. Simulation of the shadow effect gives an idea about the output of the PV cell system when system has shadow on the PV cells. Here the shadow effect on the two PV cells using series and parallel combinations are simulated and analyzed for understanding the effects on output.

Modelização de sistemas de gestão de energia em ambiente

Este trabalho propõe uma metodologia de tradução para igualar o programa de controle de PLC no ambiente Matlab/Simulink. A lista traduz automaticamente o programa de controlo de PLC para a linguagem. de software Matlab/Simulink. O programa do PlC é traduzido para uma função bloco do Matlab, dentro do ambiente Matlab/Simulink, que irá controlar o modelo do processo industrial, desde que a simulação seja executada. As entradas e saídas da lista de tradução do PLC depende do tipo de autómato que é escolhido. A lista de tradução será compatível com um ficheiro Matlab/Simulink que corresponde tradução de programa de controle de PLC. ABSTRACT: This work proposes a translation methodology to equa1 the program of control of PLC in the environment Matlab/Simulink. The list translates automatically the program of control of PLC for the language of software Matlab/Simulink. The program of the PlC is translated for a function block of the Matlab, inside the environment Matlab/Simulink, which will be going to control the model of the industrial process, since the simulation is executed. The entries and exits of the translation list of the PLC it depends on the type of automaton that is chosen. The translation list will be compatible with a filing cabinet Matlab/Simulink that corresponds translation of program of control of PLC.