Determining and increasing the hosting capacity for photovoltaics in Swedish distribution grids
2012 (English)In: Proceedings of the 27th European Photovoltaic Energy Conference (EU-PVSEC), Frankfurt, Germany, September 24-28, 2012, 2012Conference paper (Refereed)
For planning issues, it is useful to know the upper limit for photovoltaics (PV) in the electricity distribution grid with the existing design and operation – the grid’s hosting capacity – and how this limit can be increased. The aim of this paper is to quantify the hosting capacity for PV in Swedish electricity distribution grids. Three distribution grids, belonging to the Swedish DSO Fortum, are modeled and simulated in a Matlab environment: from one rural area, one residential area and one city area. The simulation includes standard Newton-Raphson powerflow computing, improved with a model of the temperature dependence of the resistance, and allows deterministic and probabilistic simulations. The results show that high PV penetrations can be allowed in the Swedish grids. When using voltage rise above 1.1 p.u. voltage as limitation, a hosting capacity of 60% PV electricity generation as a fraction of the yearly load was determined for the rural grid and the suburban grid. For the city grid, which is very robust, a hosting capacity as high as 325% was found. When using overload as limitation, the hosting capacities 20%, 25% and 70%, respectively, were determined for the same grids. Also, different methods to increase the hosting capacity are compared.
Place, publisher, year, edition, pages
National CategoryEnergy Systems
Research subject Engineering Science with specialization in Solid State Physics
IdentifiersURN: urn:nbn:se:uu:diva-185052OAI: oai:DiVA.org:uu-185052DiVA: diva2:570515
27th European Photovoltaic Energy Conference (EU-PVSEC), Frankfurt, Germany, September 24-28, 2012