Flexible power distribution technique and P2P energy trading in active distribution networks

Lou, Chengwei (2022) Flexible power distribution technique and P2P energy trading in active distribution networks. PhD thesis, University of Glasgow.

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With the increasing severity of the greenhouse effect, the depletion of fossil fuels, and the deterioration of human living environment, the development, and continuation of society are facing unprecedented crises. Energy issues are inextricably linked to global economic and social development, as well as the development of an ecological civilisation. The traditional alternating current (AC) power distribution network was a passive system with conventional operation, control, and management, making it difficult to meet the increasing demand for high-reliability electricity supply, active energy management, and flexible and open energy market. To address the three critical issues of ecological sustainability, market openness, and energy security in the energy industry, flexible power distribution techniques and distributed localised energy solutions, such as Soft Open Points (SOPs), AC/DC hybrid electricity network, and peer to peer electricity trading have emerged as new research topics. These emerged technologies are aimed at creating a power distribution network with high intelligence, robustness, and reliability to adapt to access requirements from large-scale distributed energy resources (DERs).

In this thesis, SOPs are used to achieve adaptive service restoration and improve the threephase imbalance in ADNs. The impact of faults of varying duration on the network with SOPs at distribution levels is investigated, followed by potential solutions of network reconfiguration using SOPs to improve the three-phase imbalance. The potential of SOPs is first explored via a new method of connection, entitled phase power transfer, also known as phase-changing SOP (PC-SOP). Based on the proposed two-terminal PC-SOP, an optimised operational strategy is proposed for unbalanced ADNs based on different types of SOPs (SOP with bifurcation connection and multi-terminal SOP). It is also attempted to employ AC/DC hybrid networks and optimal ESSs dispatch to decrease the three-phase four-wire imbalances while improving the operational efficiency of active distribution networks (ADNs). Finally a new P2P market architecture is designed based on the dynamic power flow tracing technique. The complete potential of the P2P market is investigated where the analogy of a "cocktail-layered" energy market is utilised to illustrate market segmentation.

Item Type: Thesis (PhD)
Qualification Level: Doctoral
Additional Information: Supported by funding from the China Scholarship Council (Reference: CSC201806350260) and the University of Glasgow.
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
Colleges/Schools: College of Science and Engineering > School of Engineering
Supervisor's Name: Yang, Dr Jin
Date of Award: 2022
Depositing User: Theses Team
Unique ID: glathesis:2022-83008
Copyright: Copyright of this thesis is held by the author.
Date Deposited: 27 Jun 2022 12:45
Last Modified: 27 Jun 2022 12:47
Thesis DOI: 10.5525/gla.thesis.83008
URI: http://theses.gla.ac.uk/id/eprint/83008
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