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Potential för storskalig anslutning av solel i landsbygdsnät
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics. (Built Environment Energy Systems Group)
2015 (Swedish)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The study examines the potential for extensive connection of photovoltaic (PV) production in the Swedish rural power grid, considering the case distribution grid (10kV) of Herrljunga Elektriska. Hourly PV production is calculated using radiation and temperature data together with information regarding building roofs in the studied area. Furthermore, hourly customer load data is aggregated, enabling detailed power flow simulations of the grid resulting in hourly voltages and currents for all nodes during 2014. Three cases with varying PV production are studied, using different thresholds for minimum annual radiation. Thus, roofs with lower annual radiation are excluded from the simulations, limiting PV production. The three cases considers annual radiation greater than 0 kWh/m2 , 700 kWh/m2 and 1000 kWh/m2.

Simulations show that the distribution grid in Herrljunga maintains acceptable performance with respect to voltages and currents for the 1000 kWh/m2,year case, yielding an annual production of 30 % of consumption. The hosting capacity, which is an estimate of the amount of PV that can be connected to the grid, is therefore 30 %. In order to further examine grid limitations, weak parts of the grid are identified. These are situated in the peripheral parts of the grid, which is in accordance with earlier studies of intermittent power production in distribution grids. Additionally, low voltage grids in connection to these weaker parts of the distribution grid are simulated, showing no further limitations for hosting capacity.

Place, publisher, year, edition, pages
2015. , 51 p.
UPTEC STS, ISSN 1650-8319 ; 15027
Keyword [en]
Hosting capacity
Keyword [sv]
Acceptansgräns, solel, solceller, solcellssystem
National Category
Energy Systems
URN: urn:nbn:se:uu:diva-258711OAI: oai:DiVA.org:uu-258711DiVA: diva2:842301
External cooperation
Herrljunga Elektriska
Educational program
Systems in Technology and Society Programme
Available from: 2015-08-12 Created: 2015-07-17 Last updated: 2015-08-12Bibliographically approved

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