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THE EFFECTS OF SOLAR SHADINGS ON THE PERFORMANCE OF PV PANELS

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Solar PV panels are very sensitive to solar shadings. Total or partial shading conditions have a significant impact rate on the capability of delivering energy and may result in lower output and power losses. Cells in a solar panel are usually connected in series to get a higher voltage and therefore an appropriate production of electricity. But when shading occurs, this structure presents some limitations.

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THE EFFECTS OF SOLAR SHADINGS ON THE PERFORMANCE OF PV PANELS

  1. 1. THE EFFECTS OF SOLAR SHADINGS
  2. 2. INDEX 1. What is shading in solar panels? 2. How can you calculate solar shading 3. Different types of solar shadings 4. archelios™ and archelios™ Pro The Effects Of Solar Shadings
  3. 3. 1. What is shading in solar panels? The Effects Of Solar Shadings
  4. 4. Solar PV panels are very sensitive to solar shadings. Total or partial shading conditions have a significant impact rate on the capability of delivering energy and may result in lower output and power losses. The Effects Of Solar Shadings
  5. 5. Cells in a solar panel are usually connected in series to get a higher voltage and therefore an appropriate production of electricity. But when shading occurs, this structure presents some limitations. The Effects Of Solar Shadings
  6. 6. In fact, when a single solar cell is shaded, the current of all the units in the string is determined by the unit that produces the least current. The Effects Of Solar Shadings Illustration by “Potential and Challenges for Building Integrated Photovoltaics in the Agder Region”
  7. 7. When a cell is shaded, the whole series is virtually shaded too. To prevent the loss of energy, the installation usually includes bypass diodes. The Effects Of Solar Shadings Illustration by “Potential and Challenges for Building Integrated Photovoltaics in the Agder Region”
  8. 8. The Effects Of Solar Shadings Bypass diodes are wired in parallel to the solar cells. When a solar cell is shaded, the bypass diode provides a current path which allows the string of connected solar cells generating energy at a reduced voltage. Bypass diodes Illustration by “Alternative Energy Tutorials” site
  9. 9. 2. How can you calculate solar shading? The Effects Of Solar Shadings
  10. 10. The Effects Of Solar Shadings Shading analysis is one of the most essential steps in the phase of solar energy system design or analysis. Shading is a matter of fact in many locations.
  11. 11. The Effects Of Solar Shadings This is why it is important to perform a shading analysis during the site survey, in order to evaluate eventual and potential obstacles such as trees or buildings which could block the sunlight.
  12. 12. The Effects Of Solar Shadings T H E R E E X I S T some equations able to calculate the solar shading and provide the client with a realistic expectation of the energy that can be delivered by the PV system.
  13. 13. The Effects Of Solar Shadings
  14. 14. The Effects Of Solar Shadings
  15. 15. The Effects Of Solar Shadings
  16. 16. 3. Different types of solar shading The Effects Of Solar Shadings
  17. 17. The Effects Of Solar Shadings There are different types of solar shadings, depending on the objects that create the shade:
  18. 18. The Effects Of Solar Shadings Temporary shading Shading resulting from the building Shading from the location Self-shading Direct shading
  19. 19. The Effects Of Solar Shadings Temporary shading The result of clouds, bird droppings, dust or fallen leaves.
  20. 20. The Effects Of Solar Shadings Shading resulting from the building Shadings resulting from the building is critical as it involves direct shadows. Examples of this type of shading are chimneys, lighting conductors, satellite dishes, antennae, roof and façade protrusions, offset building structure, roof superstructure just to name a few.
  21. 21. The Effects Of Solar Shadings Shading from the location The shading from the location comes from the building’s surrounding. There could be trees or bushes, cables running over the buildings, neighboring building or distant buildings which could equally cause horizon darkening.
  22. 22. The Effects Of Solar Shadings Self-shading With rack-mounting systems, self-shading of the modules may be caused by the row of the modules. In these cases, it is necessary to optimize the tilt and the separation between the module rows.
  23. 23. The Effects Of Solar Shadings Direct shading Direct shading can cause high losses of energy as the proximity to the shadow-casting object to hinder the PV solar panel to catch the light.
  24. 24. 4. archelios™ and archelios™ Pro The Effects Of Solar Shadings
  25. 25. BIM objects
  26. 26. The Effects Of Solar Shadings and take into account the shadows in their calculations in the 3D model.
  27. 27. The Effects Of Solar Shadings It also has the option to incorporate backtracking and / or string optimizers. is a powerful, innovative and easy-to-use software for the 3D design, yield calculation and bankability analysis of any photovoltaic project up to 50kWp. PV projects are directly accessible online and available for consultation, export or sharing.
  28. 28. The Effects Of Solar Shadings brings professionals more production capacities and advanced options. The software includes an export function toward in order to work in the electrical sizing of cables and protections ang generate the needed documents for the installation’s compliance. As well, exporting your project to AutoCAD (.DXF) and MS Excel (.CSV) is now possible.
  29. 29. Both software belong to the , The Effects Of Solar Shadings the comprehensive solution to manage the entirety of a photovoltaic project (feasibility study, 3D simulation, electrical sizing and PV monitoring).
  30. 30. Since 1987, Trace Software International has been committed to the development of software solutions and services dedicated to the industrial engineering, with a unique expertise in the design of electrical installations. www.trace-software.com
  31. 31. Trace Software France Parc Eco-Normandie 76430 Saint Romain de Colbosc France commercial@trace-software.com Trace Software Iberia Via Augusta, 48-54 08006 Barcelona – Spain sales@trace-software.com Trace Software China Shangda International Room D408, No. 3100 Hutai Road,Baoshan District Shanghai 200436, P.R.China sales@trace-software.com Trace Software Morocco 104 bis boulevard Abdelmoumen 4ème étage 20042 Casablanca – Maroc maroc@trace-software.com

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