Impacts of different data averaging times on statistical analysis of distributed domestic photovoltaic systems
2010 (English)In: Solar Energy, ISSN 0038-092X, E-ISSN 1471-1257, Vol. 84, no 3, 492-500 p.Article in journal (Refereed) Published
The trend of increasing application of distributed generation with solar photovoltaics (PV-DG) suggests that a widespread integration in existing low-voltage (LV) grids is possible in the future. With massive integration in LV grids, a major concern is the possible negative impacts of excess power injection from on-site generation. For power-flow simulations of such grid impacts, an important consideration is the time resolution of demand and generation data. This paper investigates the impact of time averaging on high-resolution data series of domestic electricity demand and PV-DG output and on voltages in a simulated LV grid. Effects of 10-minutely and hourly averaging on descriptive statistics and duration curves were determined. Although time averaging has a considerable impact on statistical properties of the demand in individual households, the impact is smaller on aggregate demand, already smoothed from random coincidence, and on PV-DG output. Consequently, the statistical distribution of simulated grid voltages was also robust against time averaging. The overall judgement is that statistical investigation of voltage variations in the presence of PV-DG does not require higher resolution than hourly.
Place, publisher, year, edition, pages
2010. Vol. 84, no 3, 492-500 p.
Time averaging, Photovoltaics, Domestic electricity demand, Distribution grid, Low voltage, Power flow
Engineering and Technology
IdentifiersURN: urn:nbn:se:uu:diva-132903DOI: 10.1016/j.solener.2010.01.011ISI: 000276119000018OAI: oai:DiVA.org:uu-132903DiVA: diva2:359588
Correction in: Solar Energy, 2011, vol. 85, issue. 1, p. 214, doi:10.1016/j.solener.2010.11.0152010-10-282010-10-282016-04-18Bibliographically approved