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Development of Estimation Method of Spatial Average Irradiance Fluctuation Characteristics Considering Smoothing Effect around Observation Point
Author(s) -
Kato Takeyoshi,
Kumazawa Shinsuke,
Honda Nobuyuki,
Koaizawa Masakazu,
Nishino Shinichi,
Suzuoki Yasuo
Publication year - 2014
Publication title -
electronics and communications in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.131
H-Index - 13
eISSN - 1942-9541
pISSN - 1942-9533
DOI - 10.1002/ecj.11595
Subject(s) - irradiance , smoothing , mathematics , spatial filter , solar irradiance , point (geometry) , radius , optics , statistics , physics , meteorology , computer science , geometry , computer security
SUMMARY In order to estimate the total power output fluctuation of a high‐penetration photovoltaic power generation system by using data from a limited number of points, the smoothing effect around individual observation points should be taken into account. Based on the transfer hypothesis, this study proposes a low‐pass filter (LPF) to estimate the spatial average irradiance fluctuation characteristics taking the smoothing effect around the observation point into account. First, by using the irradiance data observed at 18 points in the Nobi plain, we confirmed that the fluctuation characteristics of the spatial average irradiance can be estimated by using the characteristics of the single point irradiance when the radius of the equivalent circular area is smaller than 30 km. Then, by formulating the relation between the area size and the fluctuation cycle from which the random fluctuation factor begins to increase, we developed a LPF to take the smoothing effect around the observation point into account. Finally, we demonstrated that the spatial average fluctuation characteristics can be estimated successfully for various area sizes within a radius of 20 km by applying a dedicated LPF according to the area size.