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A novel shade analysis technique for solar photovoltaic systems
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
2014 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

Solar power is a rapidly growing energy source. As efficiency increases and costs decrease, solar photovoltaic (PV) systems are becoming increasingly attractive for small and medium scale consumers to invest in. Despite advancements in photovoltaic technology, minor shading will still drastically reduce the performance of a solar cell module. Therefore, shade analysis should be performed before installation in order to assess the financial viability of an investment as well as to optimize the location and orientation of a photovoltaic module. The process of accurate shade analysis however, is something that is currently only carried out by professionals using expensive equipment.

This bachelor’s thesis aims to develop the concept of a smartphone based shade analysis technique, which by using MATLAB’s predefined image processing should produce a shading diagram together with data ready for use as input in PV simulation software. The results should be comparable to those of professional shading analysis products.

As a result, the concept of a shading analysis technique based on panoramic image capturing using a smartphone and MATLAB image processing has been shown to work. The final analysis technique uses a smartphone captured panoramic image as input and provides two forms of output:

  1. A shading diagram for easy and quick overview, providing information about which obstacles may cause shading at a specific time of day and year
  2. An excel file that can be used as input in the PV simulation software System Advisor Model (SAM)
Abstract [sv]

Solenergi är en snabbt växande energikälla. Allteftersom effektiviteten ökar och kostnaden minskar, blir solcellssystem allt mer attraktivt för små och medelstora konsumenter att investera i. Trots framsteg inom solcellsteknik, fortsätter även mindre skuggning att ge upphov till stora effektbortfall i solcellsmoduler. Därför utförs ofta skugganalys före installation, för att bedöma investeringens ekonomiska lönsamhet, likväl som för att optimera placeringen av solcellsmodulen. För närvarande är dock precis skugganalys något som endast utförs av yrkesverksamma med hjälp av dyr specialutrustning.

Detta kandidatexamensarbete syftar till att utveckla ett koncept kring en smartphone-baserad skugganalysteknik som med MATLABs fördefinierade digitala bildbehandling ska producera ett skuggdiagram tillsammans med data som kan användas i PV-simuleringsverktyg. Resultaten ska vara jämförbara med resultat från professionella produkter för skugganalys

Efter projektets genomförande kan det konstateras att konceptet med en skugganalysteknik baserad på MATLABs bildbehandling och en panoramabild som tagits med en smartphone fungerar. Den slutliga analystekniken använder sig av en panorama bild som indata och ger utdata i två former

  1. Ett skuggdiagram för enkel och snabb överblick, vilket ger information om vilka hinder som skulle kunna orsaka skugga vid specifik tid
  2. En excel-fil som kan användas som indata i PV-simuleringsprogrammet System Advisor Model (SAM)
Place, publisher, year, edition, pages
2014.
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-148122OAI: oai:DiVA.org:kth-148122DiVA: diva2:735243
Available from: 2014-08-21 Created: 2014-07-24 Last updated: 2014-08-21Bibliographically approved

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