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Optimal criterion and global/sub-optimal control schemes of decentralized economical dispatch for AC microgrid

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成果类型:
期刊论文
作者:
ZhangjieLiu;MeiSu;YaoSun;LangLi;HuaHan;XinZhang;MinghuiZheng
作者机构:
Central South University, School of Information Science and Engineering, Changsha, China
University at Buffalo, The State University of New York, Department of Mechanical and Aerospace Engineering, New York, United States
Nanyang Technological University, School of Electrical and Electronic Engineering, Singapore
语种:
英文
关键词:
Economical dispatch;Decentralized control;Cost-based droop;Microgrid
期刊:
International Journal of Electrical Power & Energy Systems
ISSN:
0142-0615
年:
2019
卷:
104
页码:
38-42
机构署名:
本校为第一机构
院系归属:
信息科学与工程学院
摘要:
This letter studies the economical dispatch problems (EDPs) in islanded microgrid from three aspects: a) whether the global optimal dispatch (GOD) can be achieved through a decentralized manner in a system; (b) if yes, how to achieve the GOD; (c) otherwise, how to obtain a suboptimal alternative. As a result, we arrive a criterion that GOD can be achieved in decentralized manners if and only if optimal solution functions (OSFs) are all strictly monotonically increasing. If a system meets this criterion, a decentralized droop method is proposed to help the system achieve GOD. Otherwise, a modified decentralized method is presented to guarantee the suboptimal dispatch. Both simulation and experiments are performed to validate the proposed methods.

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