• RES402/RES604 Renewable Energy Systems


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  • FileName: RES402_Lab1.pdf [read-online]
    • Abstract: RES402/RES604 Renewable Energy SystemsLaboratory 1: PV Module Model using Matlab Simulink1. ObjectiveApplying Matlab Simulink software to simulate photovoltaic (PV) module in renewableenergy systems2. Equipment

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RES402/RES604 Renewable Energy Systems
Laboratory 1: PV Module Model using Matlab Simulink
1. Objective
Applying Matlab Simulink software to simulate photovoltaic (PV) module in renewable
energy systems
2. Equipment
PC desktop with Matlab software
File: reslab_1.zip
3. Introduction
Figure 1 shows the well known single diode equivalent circuit model of a photovoltaic cell.
Omitting the parallel resistance Rp, a mathematical expression of a PV cell in single diode
model, as shown in Figure 1, can be presented as an exponential equation:
V + IR s
VT
I = I s − I o (e − 1)
where:
I = cell current I0 = reverse saturation current
V = cell voltage Rs = intrinsic resistance of cell
IS = photo current T = absolute temperature
VT = thermal voltage A = diode’s quality factor
=AkT/q k = Boltzmann’s constant, 1.38 x 10-23 J/K
q = electron charge, 1.602 x 10-19 C
Figure 1. Solar cell in a single diode model.
Figure 2. Photovoltaic model in Simulink.
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4. Simulation of Multi-crystalline Silicon (c-Si) PV Module
Simulation is performed using provided simulink model in the zipped file reslab_1.zip.
Extract the zipped file and run simulations below.
4.1 PV module characteristics
1. Open simulink file named “msx60_model.mdl”
2. Run the simulation with Suns = 0.25 and T=25 Celsius degree.
3. Save values of Vpv and Ipv in text format from Matlab workspace.
4. Repeat step 2-3 with Suns = 0.5, 0.75 and 1.0 at T=25 Celsius degree.
5. Repeat step 2-3 with Suns = 1.0 at T = 5, 45 and 70 Celsius degree.
4.2 Solar Charger
1. Open simulink file named “batt_charger.mdl”
2. Set battery voltage at 6 volt. Run the simulation.
3. Save values of Time, Ppv and Irradiance in text format from Matlab workspace.
4. Repeat the simulation with battery voltage is set to 9 and 12 volt.
5. Simulation of Amorphous Silicon (a-Si) PV Module
Repeat simulation in section 4 using “amorphous_model.mdl” file.
6. Question
From PV module characteristics simulation:
1. Plot the Current–Voltage characteristic of PV module
2. Plot the Power–Voltage characteristic of PV module
3. Find Open circuit (Voc), Short circuit (Isc), Optimum current (Iopt), Optimum voltage
(Vopt) and Maximum power (Pmax)of PV module at STC
4. Find temperature coefficient for Voc, Isc and Pmax
From solar charger simulation:
1. Calculate the total energy stored in the battery
2. Calculate “one day energy efficiency”
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Use: 0.0425