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

• Main Authors: Young-Sik Jang, Mun-Kyeom Kim
• Format: Article
• Language: English
• Published: MDPI AG 2017-03-01
• Series: Energies
• Subjects: chance-constrained approach; dynamic economic dispatch (DED); model predictive control (MPC); energy band operation scheme; tie-line flow (TLF)
• Online Access: http://www.mdpi.com/1996-1073/10/3/300

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.