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

ENERGIES 2017年第12期10卷 2071页

作者： Zhou, Xiaoqian Ai, Qian Wang, Hao Shanghai Jiao Tong Univ Sch Elect Informat & Elect Engn Dongchuan Rd Shanghai 200240 Peoples R China

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.

关键词： microgrid clusters marginal costs line loss consensus algorithm distributed economic control distributed secondary controllers

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