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A Dynamic Economic Dispatch Model for Uncertain Power Demands in an Interconnected Microgrid

Young-Sik Jang () and Mun-Kyeom Kim ()
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Young-Sik Jang: Technology Strategy Team, Korea Electric Power Corporation, 55, Jeollyeok-ro, Naju-si 58217, Jeollanam-do, Korea
Mun-Kyeom Kim: Department of Energy System Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 156-756, Korea

Energies, 2017, vol. 10, issue 3, 1-16

Abstract: In this paper, we propose a dynamic economic dispatch (DED) model with sharing of responsibility for supply–demand balance under uncertain demands in a microgrid (MG). For developing the proposed model, an energy band operation scheme, including a tie-line flow (TLF) contraction between the main grid and the microgrid (MG), is constructed for preventing considerable changes in the TLFs caused by DED optimization. The proposed scheme generalizes the relationship between TLF contractions and MG operational costs. Moreover, a chance-constrained approach is applied to prevent short- and over-supply risks caused by unpredictable demands in the MG. Based on this approach, it is possible to determine the reasonable ramping capability versus operational cost under uncertain power demands in the MG.

Keywords: chance-constrained approach; dynamic economic dispatch (DED); model predictive control (MPC); energy band operation scheme; tie-line flow (TLF) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
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