Forecasting of solar irradiance with just-in-time modeling

Takanobu Suzuki*, Yusuke Goto, Takahiro Terazono, Shinji Wakao, Takashi Oozeki

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


PV power output mainly depends on solar irradiance, which is affected by various meteorological factors. Thus, it is required to predict solar irradiance in the future for the efficient operation of PV systems. In this paper we develop a novel approach for solar irradiance forecasting, in which we combine the black-box model (JIT modeling) with the physical model (GPV data). We investigate the predictive accuracy of solar irradiance over a wide controlled area of each electric power company by utilizing measured data from 44 observation points throughout Japan provided by JMA and 64 points around Kanto provided by NEDO. Finally, we propose an applied forecasting method of solar irradiance to deal with difficulties in compiling databases. We also consider the influence of different GPV default times on solar irradiance prediction.

Original languageEnglish
Pages (from-to)19-28
Number of pages10
JournalElectrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)
Issue number4
Publication statusPublished - 2013 Mar


  • GPV data
  • black-box modeling
  • just-in-time modeling
  • solar irradiance forecasting
  • solar irradiance over wide area

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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