Webinar 02 demonstration of pv system design pvsyst

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Email: [email protected] Tele: 871 722 9522 Skype: todosolarmexico Demonstration of PV system design Using PVSYST Dr. Jeffery Lee Johnson CTO Todo-Solar Coahuila, Mexico

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SolPowerPeople #SolarMOOC Demonstration on PV System Design using PVSYT by Dr. Jeffery Lee Johnson of TodoSolar

Transcript of Webinar 02 demonstration of pv system design pvsyst

  • 1. Demonstration of PV system design Using PVSYST Dr. Jeffery Lee Johnson CTO Todo-Solar Coahuila, MexicoEmail: [email protected] Tele: 871 722 9522 Skype: todosolarmexico

2. Agenda Resources A review of the basic principles of Photovoltaic Engineering What is PV System design? Initial Project Assessment: Matching Kwh of consumption (energyneeded) to solar Kwh produced using an actual Case Study Case Study in Design : A real time design demonstration using PVSYS Comparison of predicted performance to actual performance Special features of PVSYST, compatibility with other resources TodoSolar and TodoSolarKids 3. ResourcesDoc Solstices Seasoned SentimentsThe question of the day that is on everybodys mindsDoes Solar Energy have a future ? 4. Resources Doc Solstices Seasoned SentimentsThe question of the day that is on everybodys mindsDoes Solar Energy have a future ?Solar Energy is here and is here to stay 5. BASIC PRINCIPLES OFPHOTOVOLTAIC ENGINEERING 6. Key Concepts and Equations The mathematics of PV engineering relies mostly on a singleequation - The Schockley diode equation Watts peak : The Power output of a panel under specific conditions 1000 W / m2 solar radiation normal (perpendicular to surface) at 25 C and 1 atm. A normalized quantity that is helpful but not useful and is confusing Specific yield The PV designers best friend Specific yield is the Kwh produced per KWp installed per day (Kwh/KW/day) It is normalized quantity independent of total size of system Specific yield depends on Geographical location and climate (solar resource) Installation and orientation Design by matching components for optimum performance 7. The Shockley Diode Equation(The physics of the P-N Junction)eVVII0 exp1I0exp1kTVthermal ewhereVthermal 26mV at 300KkT 8. A First Look at the Diode Equation eV VBLUE CURVEI I0 exp1I0 exp1 kT Vthermalewhere Vthermal 26mV at 300K kT 9. Photo-active materials(semiconductors) PhotonEffect on diode equation 10. The photovoltaic Equation and curveV RED CURVEI I 0 exp1 I PHVthI I I0 11. The Photodiode is at the heart of every opto-electronic device including solar cellsPower = I x VLasersElectrical diode PhotodiodesSolar Cells 12. The Solar Cell Isc and Voc 13. Variation with Temperature and Irradiation 14. Variation of Isc and Voc with Radiation ISC varies linearly in proportion with illuminationqI phVoc varies logarithmicallyVOC ln1 kT I0 with illumination 15. ISC and VOC variation withTemperature ISC varies little with changes in temperatureqI ph VOCln1 kT I0 qI phVoc Is inversely proportional withVOCln1kT I0 temperature 16. Solar Cell PowerPI V VP VIL I0 exp1 Vthemal dPdPVmax0I max0 dVdI 17. Maximum Power point trackingAll modern inverters have MPPT capability that optimizes the power point for astring or array of solar panels 18. WHAT IS PV SYSTEM DESIGN? 19. Panel and series characteristicsString is a series of panels withpredetermined current andvoltage outputV = V1 + V2 + Vn = ViI = I1 = I2 = In 20. Inverter characteristics Inverters have input requirements Number of DC inputs Minimum/Maximum current Minimum/Maximum Voltage MPPT range of Voltage 21. Matching the panels with inverter iscalled String Sizing 22. Matching the panels with inverter iscalled String Sizing Inverters have Output characteristics Peak Power Specific Yield Grid connection compatibility Annual Production of energy Kwh 23. Matching all components to generate the desired powerand energy output for a client is the called PV systemDesign 24. INITIAL PROJECT ANALYSISA CASE STUDY IN DETERMINING KWH NEEDED 25. Collect data from Client Utility bill providesconsumption and prices for ayear We know the precisegeographical location A site visit provides: the area available orientation possibilities shading issues Grid connection Electrical interfaceWe can now begin the design 26. Using consumption needs to estimate sizingNeeds 26,823 Kwh per year. Using a Specific yield of 4.5. this clientneeds a minimum system of 16 KW 27. A CASE STUDY IN PV SYSTEM DESIGNUSING PVSYST 28. PVSYST Simulation Software http://www.pvsyst.com/ 29. DEMO 30. COMPARING PREDICTED WITHACTUAL PERFORMANCEUSING SYSTEM MONITORING 31. http://www.sma-america.com/en_US.htmlhttp://www.sunnyportal.com/Templates/Start.aspxhttp://www.sunnyportal.com/Templates/PublicPageOverview.aspx?plant=e40d994b-9238-4c84-818b-82c731316308&splang=en-US 32. SPECIAL FEATURES OFPVSYST 33. (Solar Energy made available to Everyone) Twitter: @TodoSolar Twitter: @TodoSolarKidshttp://www.sunnyportal.com/Templates/PublicPageOverview.aspx?plant=e40d994b-9238-4c84-818b-82c731316308&splang=en-US