This thesis evaluates a local direct current grid (DC-grid) wherefour office buildings with photo-voltaic (PV) facilities has beenconnected. The power system has been analyzed and a model of the gridhas been developed to quantify the increased own consumption and thereduction of power peaks. The results has been used to evaluate thegrid from an economic point of view to answer if the installation ofthe grid was profitable. The grid has also been evaluated from atechnical standpoint and future possibilities has been identified.The study shows that an own consumption of solar power was increasedfrom 81,6 per cent in average to 99,2 per cent, which resulted in areduction of annual consumed power by 34 MWh. The power peaks wasreduced with 196 kW in total annually. The analysis also shows thatthe electrical contract can be changed for in one of the buildings.The annual operating costs was reduced by 13 kSEK along with thereduction in energy equating to roughly 34 kSEK in savings, resultingin approximately 47 kSEK of total annually savings. With aninvestment cost of 531 kSEK and a cost of capital set to 5 per cent,the installed DC-grid is profitable. Future possibilities identifiedwas to connect more buildings and PV systems to the grid, analyzeelectrical consumption for greater understanding, implementation ofenergy storage and fast electrical vehicle chargers.
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:uu-349233 |
| Date | January 2018 |
| Creators | Flyckt, Alexander |
| Publisher | Uppsala universitet, Elektricitetslära |
| Source Sets | DiVA Archive at Upsalla University |
| Language | Swedish |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | UPTEC ES, 1650-8300 ; 18 017 |
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