This is a time sensitive question.

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Objectives The objectives of this laboratory experiment are summarized below: 1. To become familiar with modeling a PV solar cell in Simulink. 2. To obtain the plot of de current and de power as a function of de voltage for a simple PV cell model. 3. To develop an exact Simulink model of a PV cell with internal series and parallel resistances. 4. To obtain the plot of dc current and dc power as a function of de voltage for the exact PV cell model. 5. Compare the results of the simple and exact models. Procedure A simple model of a PV solar cell is shown below in the Figure on the next page. The load voltage is a ramp of 0 to 0.6 V. This Simulink model uses a Function model that is found under User-Defined-Models in the Simulink environment. This function should incorporate the diode equation with a reverse saturation current of 1 nA at a room temperature of 25 °C.
N 2 I vs V PV Short Circuit Current Id vs V 다 f(u) Load Voltage Ramp Diode Equation P vs V Product Figure 1. A Simple Simulink Model of a PV Solar Cell Part 1 – Building the Model Build the model of Figure 1 in the Simulink environment and choose the following for the simulation Configuration Parameters: - Simulation Start Time of 0.0 second - Simulation Stop Time of 0.6 second - Solver Option Type of “Fixed-Step” and a Solver of “ode3" - Step Size of 0.01 second After performing the simulation, verify that you have produced correct results. Then delete the XY Graphs and write I, V and P in Workspaces. Save this model. Part 2 - Simulation of I-V and P-V for the PV Cell Start with a PV cell short circuit current of 2 A and a voltage ramp of 0 to 0.6 V to perform the Simulink simulation. Plot the dc current I and dc power P as a function of de voltage V in Matlab. Print the two characteristics curves (I-V & P-V) as two subplots on one sheet of paper. The x-axis should be your voltage in volts (a range of 0 to 0.6 V produces a nice plot), and y-axis either current in A or power in W. Show the maximum power point on the plots.
Part 3 – Exact Model The simple model of the PV solar cell can be modified to obtain a more exact model. The exact model will include the PV solar cell internal series and parallel resistances. 2 I vs V PV Short Circuit Current 0.05 Rs 6 Rp Rs Rp 마 4X4 fon 11 Load Voltage Ramp Part of Formula 8.17 Pvs V Product Figure 2. An Exact Simulink Model of a PV Solar Cell Start with the simple simulink model. Use two new constants, one for the series resistance Rs and the other for parallel resistance Rp. Now replace the “Function” with an “Embedded Matlab Function”. This new function has 4 inputs and 1 output. Program the second and third components of the load current equation in this function: function 11 = fcn (Rs, Rp, V, I) % This block supports an embeddable subset of the MATLAB language. See the help menu for details. 11 = le-9* (exp(38.927* (V+I*Rs))-1) + (V+I*Rs) /Rp; Now use a zero value for Rs, and a very large number for Rp. Perform the Simulink simulation and verify that the results are identical to the results of the simple model.
Part 4 - Simulation of I-V and P-V for the Exact PV Cell Model Insert a value of 50 m 2 for Rs and 6 2 for Rp and perform the Simulink simulation. Plot the dc current I and dc power P as a function of de voltage V in Matlab. Print the two characteristics curves (I-V & P-V) as two subplots on one sheet of paper. The x-axis should be your voltage in volts (a range of 0 to 0.6 V produces a nice plot), and y-axis either current in A or power in W. Show the maximum power point on the plots. Page 3 of 4 Part 5 – Comparison of Results Compare the results of Parts 2 and 4. Compare the two I-V characteristic curves by plotting them on the same graph. Then determine the values of series and parallel resistances (Rs & Rp). Also, compare the two P-V characteristic curves and determine the reduction in the maximum cell power. Report and Documentation At the end, submit your typed report including your results, calculations, and comments. There are no specific writing format for your report. There are no page limits on your report document.