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Using analytical expressions for the location-pair correlation to determine the output variability of a solar power plant
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics. (Built Environment Energy Systems Group (BEESG))
2012 (English)In: Proceedings of the 2nd International Workshop on Integration of Solar Power into Power Systems, Lisbon, Portugal, November 12-13, 2012, 2012Conference paper, Published paper (Refereed)
Abstract [en]

When increasing the integration of solar power in power systems, the short-term output variability of solar power plants will affect the requirements on balancing reserves. Methods to predict the degree of variability from arbitrary PV system configurations over different sub-hourly time scales, subject to the smoothing that takes place as a result of cloud movements, will be important for determining new requirements on reserve capacity. In particular, a better understanding of the smoothing of high-frequency irradiation variability over extended areas with a nearly continuous distribution of PV systems, such as dense PV fleets in urban areas or large PV power plants, is needed. This paper presents an analytical model for the autocorrelation of high-resolution irradiance data (in so-called virtual radiation networks) and uses this to obtain a model for the irradiance variability integrated over a geographical area. The proposed model explains and reproduces accurately the features of virtual radiation networks and is able to predict the total variability of a PV field for an arbitrary choice of time resolution, cloud speed and extension in the direction of cloud movement.

Place, publisher, year, edition, pages
2012.
National Category
Energy Systems
Research subject
Engineering Science with specialization in Solid State Physics
Identifiers
URN: urn:nbn:se:uu:diva-185053OAI: oai:DiVA.org:uu-185053DiVA: diva2:570521
Conference
2nd International Workshop on Integration of Solar Power into Power Systems, Lisbon, Portugal, November 12-13, 2012
Available from: 2012-11-19 Created: 2012-11-19 Last updated: 2013-01-03

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Widén, Joakim

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