Spatial interpolation of the solar irradiance; A study from the smoothing effect of irradiance fluctuations

Author

Kawasaki, Norihiro ; Usami, Akira ; Nishioka, Kojiro ; Shimakage, Toyonari ; Sumita, Jiro ; Yamane, Hiroshi

Author_Institution

Central Res. Inst. of Electr. Power Ind., Tokyo, Japan

fYear

2011

fDate

19-24 June 2011

Abstract

In the near future, short time fluctuations of the power generation from grid-connected photovoltaic (PV) power generation systems will become an important issue in the utilities. The smoothing effect that the fluctuations of the power generation from scatteringly installed PV power generation systems cancel out is well known. In this study, we have demonstrated the smoothing effect for short time fluctuations from analyses of the solar irradiance in an area of an about 10km square. Additionally, the spatial interpolation of the solar irradiance is also discussed. A good agreement between the measurements and the predictions of the spatial interpolation is obtained in fluctuation cycles longer than 8 minutes.

Keywords

interpolation; photovoltaic power systems; power grids; power system measurement; grid-connected PV power generation system; grid-connected photovoltaic power generation system; short time fluctuation; smoothing effect; solar irradiance fluctuation cycle; spatial interpolation measurement; spatial interpolation prediction; Correlation; Fluctuations; Fourier transforms; Frequency conversion; Interpolation; Smoothing methods; Time frequency analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Photovoltaic Specialists Conference (PVSC), 2011 37th IEEE

Conference_Location

Seattle, WA

ISSN

0160-8371

Print_ISBN

978-1-4244-9966-3

Type

conf

DOI

10.1109/PVSC.2011.6186306

Filename

6186306