Adaptive Marginal Costs-Based Distributed Economic Control of Microgrid Clusters Considering Line Loss

Xiaoqian Zhou, Qian Ai and Hao Wang
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Xiaoqian Zhou: School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Dongchuan Road, Shanghai 200240, China
Qian Ai: School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Dongchuan Road, Shanghai 200240, China
Hao Wang: School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Dongchuan Road, Shanghai 200240, China

Energies, 2017, vol. 10, issue 12, 1-18

Abstract: When several microgrids (MG) are interconnected into microgrid clusters (MGC), they have great potential to improve their reliability. Traditional droop control tends to make the total operating costs higher as the power is distributed by capacity ratios of distributed energy resources (DERs). This paper proposes an adaptive distributed economic control for islanded microgrids which considers line loss, specifically, an interesting marginal costs-based economic droop control is proposed, and consensus-based adaptive controller is applied, to deal with power limits and capacity constraints for storage. The whole expense can be effectively lowered by achieving identical marginal costs for DERs in MGC. Specially, the capacity constraints only for storages are also included to do further optimization. Moreover, consensus-based distributed secondary controllers are used to rapidly restore system frequency and voltage magnitudes. The above controllers only need to interact with neighbor DERs by a sparse communication network, eliminating the necessity of a central controller and enhancing the stability. A MGC, incorporating three microgrids, is used to verify the effectiveness of the proposed methods.

Keywords: microgrid clusters; marginal costs; line loss; consensus algorithm; distributed economic control; distributed secondary controllers (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
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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