In the development and performance test of maximum power point tracker and converter, it is hard to guarantee PV module output due to the solar insolation and temperature. In this poster, a real-time simulator of a PV module is developed with the following functions: -Calculate the solar position -Obtain real-time weather conditions through Yahoo! Weather -Detect and measure the external load -Generate electric outpu

Zhang, Linfeng

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1. IntroductionA Real-Time SimulatorOf A Photovoltaic Module Linfeng ZhangDepartment of Electrical EngineeringUniversity of Bridgeport, Bridgeport, CT 06604In the development and performance test ofmaximum power point tracker and converter, itis hard to guarantee PV module output due tothe solar insolation and temperature [1].In this poster, a real-time simulator of a PVmodule is developed with the followingfunctions:o Calculate the solar positiono Obtain real-time weather conditions throughYahoo! Weathero Detect and measure the external loado Generate electric outputReferences1. Minwon Park, I.-K.Y., A Novel Real-TimeSimulation Technique of Photovoltaic GenerationSystems Using RTDS. IEEE Transactions onEnergy Conversion, 2004. 19(1): p. 164-169.2. Linfeng Zhang, The performance of a grid-tiedmicrogrid with hydrogen storage and a hydrogenfuel cell stack, Energy Conversion andManagement, 2014, 87:421-4273. http://www.esrl.noaa.gov/gmd/grad/solcalc/azel.html2. Simulation ModelsFigure 4 The comparison of the IV curvesbetween the simulator output and the theoreticalunder different irradiance levels.2.2 Weather ConditionsThe real-time weather condition is obtained throughYahoo! Weather RSS Feed. This is implementedthrough the LabVIEW HTTP Get function and the xmlfile parsing.3. Experimental Setup4. Results and Discussion0 5 10 15 20 250123456  Current (A)Voltage (V) 1000W/m2 test 800W/m2 test 200W/m2 test 1000W/m2 calc 800W/m2 calc 200W/m2 calc0 5 10 15 20 25020406080100  Power (W)Voltage (V) 1000W/m2 test 800W/m2 test 200W/m2 test0 100 200 300 400 500 6000510152025 Voltage (V)Time (s)02468101214161820Current (A)2.1 PV ModuleIrradiance (w/m2)Voc(V)Isc(A)Vmp(V)Imp(A)1000 22.1 5.21 17.9 5.03800 21 4 17.5 3.5600 20.5 3 17.5 2.5400 20 2 17.5 1.5200 19 1 17.5 0.7Table 1 Characteristic parameters of the PV module%/oCVoc -0.36Isc 0.105Vmpp -0.408Impp -0.0281Table 2 Temperature coefficient(e 1)BVscI I A   , ,OC ambient STC ambient OC ratedV T T V  2.3 Solar Position8 10 12 14 16 180510152025303540  Altitude (0)Time (hour) NOAASimulation8 10 12 14 16 18100120140160180200220240260  Azimuth (0)Time (hour) NOAASimulationProgrammable DC LoadTekPower 3711A(0-500Ω)Programmable DC Power SourceBK Precision 1788(0-32V, 0-6A)LabVIEW softwareFigure 3 Comparison of the Azimuth (a) and solaraltitude (b) between the calculation and the reference[3] on Feb. 20, 2014Figure 1 The front panel of the simulatorFigure 1 shows the user-friendly interface andthe only input to the simulator is a zip codeFigure 2 The structure of the simulatorThe structure includes four modules shown inFigure 2 and the Solar module is the core whichinteracts with the other three and the physicalinstrument, DC power source.(a)(b)Figure 5 The power-voltage curves under threeirradiance levelsFigure 6 The dynamic output from the simulatorFigure 4 show that the simulator output is veryclose with the maximum voltage difference 0.4V.Figure 6 shows the fast response of the simulator.5. ConclusionThe simulator can be used to replace a real PVmodule for the development of MPPT andconverters

A Real-Time Simulator of a Photovoltaic Module

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A Real-Time Simulator of a Photovoltaic Module

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