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Title: A Solar Time-based Analog Ensemble Method for Regional Solar Power Forecasting

This paper presents a new analog ensemble method for day-ahead regional photovoltaic (PV) power forecasting with hourly resolution. By utilizing open weather forecast and power measurement data, this prediction method is processed within a set of historical data with similar meteorological data (temperature and irradiance), and astronomical date (solar time and earth declination angle). Further, clustering and blending strategies are applied to improve its accuracy in regional PV forecasting. The robustness of the proposed method is demonstrated with three different numerical weather prediction models, the North American Mesoscale Forecast System, the Global Forecast System, and the Short-Range Ensemble Forecast, for both region level and single site level PV forecasts. Using real measured data, the new forecasting approach is applied to the load zone in Southeastern Massachusetts as a case study. The normalized root mean square error (NRMSE) has been reduced by 13.80%-61.21% when compared with three tested baselines.
 [1] ;  [2] ;  [3] ;  [3] ;  [4] ;  [5]
  1. Northeastern Univ., Malden, MA (United States)
  2. Sichuan Univ., Chengdu (China)
  3. IBM, Yorktown Heights, NY (United States). Thomas J. Watson Research Center
  4. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  5. Northeastern Univ., Boston, MA (United States)
Publication Date:
Report Number(s):
Journal ID: ISSN 1949-3029
Grant/Contract Number:
Accepted Manuscript
Journal Name:
IEEE Transactions on Sustainable Energy
Additional Journal Information:
Journal Name: IEEE Transactions on Sustainable Energy; Journal ID: ISSN 1949-3029
Research Org:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Country of Publication:
United States
14 SOLAR ENERGY; solar power forecasting; photovoltaic systems; analog; ensemble; modeling
OSTI Identifier: