Robust Economic Dispatch Model of Interconnected Microgrid Considering Tie Line Power Stability

doi:10.11930/j.issn.1004-9649.201903086

Abstract

Abstract: Low energy utilization efficiency and serious environmental pollution problems have promoted dramatic development of distributed microgrids all over the world. A microgrid is a controllable entity which can be viewed as an equivalent fixed load with sequence and periodicity from the perspective of the grid when its tie line power can be periodically stable. However, the tie line power stability can be risky due to the uncertainty of renewable energy in microgrid. To address this challenge, this paper proposes a robust economic dispatch model of the interconnected microgrid considering tie line power stability, where the power delivered from/to the grid can always be maintained at a stable level by coordinating other dispatchable distributed generators and battery energy storage system. Additionally, this model can reduce the risk from the uncertainty of renewable energy. The column-and-constraint generation method is used to solve the robust model. Simulation on a modified IEEE 33-bus distribution system indicates that the proposed model is effective to give a robust equivalent load profile of the interconnected microgrid.

Key words: microgrid, uncertainty, power stability, equivalent load, robust feasibility, column-and-constraint generation (C&CG)

CLC Number:

TM732

KANG Kai, DENG Shaoping, ZHANG Chao, ZHANG Yunlong, WU Xiong, WANG Zhao. Robust Economic Dispatch Model of Interconnected Microgrid Considering Tie Line Power Stability[J]. Electric Power, 2019, 52(6): 60-67.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201903086

https://www.electricpower.com.cn/EN/Y2019/V52/I6/60

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