Stochastic security‐constrained hydrothermal unit commitment considering uncertainty of load forecast, inflows to reservoirs and unavailability of units by a new hybrid decomposition strategy. Issue 12 (1st December 2014)

• Record Type: Journal Article
• Authors: Ansari, Mohammad Reza; Amjady, Nima; Vatani, Behdad
• Is Part Of: IET generation, transmission & distribution. Volume 8:Issue 12(2014)
• Page Start: 1900
• Page End: 1915
• Publication Date: 2014-12-01
• Subjects: hydrothermal power systems -- reservoirs -- power system security -- load forecasting -- power generation dispatch -- power generation scheduling -- power generation reliability -- integer programming -- linear programming -- approximation theory -- relaxation theory -- stochastic programming -- IEEE standards; stochastic security‐constrained hydrothermal unit commitment -- load forecast uncertainty -- IEEE 9‐bus test systems -- IEEE 118‐bus test systems -- outer approximation‐equality relaxation -- generalised Benders decomposition -- mixed‐integer nonlinear nature -- AC network modelling -- hydro reservoirs -- inflows prediction -- SSCHTUC model -- hybrid decomposition strategy -- units unavailability; Electric power production -- Periodicals; Electric power transmission -- Periodicals; Electric power distribution -- Periodicals; 621.3105
• DOI: 10.1049/iet-gtd.2014.0145
• Languages: English
• ISSNs: 1751-8687

Abstract

Abstract : This study presents a new stochastic security‐constrained hydrothermal unit commitment (SSCHTUC) model considering the uncertainty of load forecast, prediction of inflows to hydro reservoirs and unavailability of units. In addition, the proposed SSCHTUC includes AC network modelling. To cope with the large‐scale and mixed‐integer non‐linear nature of the model, a new hybrid decomposition strategy composed of generalised Benders decomposition and outer approximation/equality relaxation (OA/ER) is proposed. In addition, to handle the uncertainty sources, a combination of scenario approach and two‐stage stochastic programming is suggested. The proposed SSCHTUC model and decomposition strategy are tested on the IEEE 9‐bus and 118‐bus test systems. Obtained results illustrate the effectiveness of the developed approach.