NDLI: Distributed-hierarchical control strategy to coordinate peer-to-peer energy transactions and node voltages at low voltage distribution networks

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Distributed-hierarchical control strategy to coordinate peer-to-peer energy transactions and node voltages at low voltage distribution networks

Content Provider	IET Digital Library
Author	Fazeli, Seyed Mahdi Li, Ran Li, Furong
Abstract	Peer-to-peer (P2P) energy market has emerged as a promising way to absorb local generations. However, unregulated P2P transactions are likely to exacerbate voltage violations at distribution networks. The challenge is how to ensure P2P markets to flourish whilst maintaining system voltages within the stator limits. This study proposes a distributed-hierarchical control structure consisting of a central controller and peer controllers to address the challenge. The central controller computes the optimised P2P transaction levels and the nodal voltage references simultaneously and sends the outcomes to the peers as routing-update messages at regular intervals. The peer controllers are developed based on individual phase decupled P–Q theory where two individual channels follow the optimised transaction levels and nodal voltage references. The peers, also, apply a current limit strategy to release the network capacity and improve voltage profiles when confronting with short-term voltage magnitude variations between the two update intervals. A case-study-based investigation shows that reactive power contributions improve the power transaction levels up to 30% while the node voltage violations are reduced. The effectiveness of the proposed strategy is validated using simulation and compared with state-of-the-art voltage mitigation methodologies over the IEEE 19-bus system.
Starting Page	843
Ending Page	850
Page Count	8
Volume Number	3
e-ISSN	25152947
Issue Number	Issue 6, Dec (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-stg/3/6
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-stg.2019.0342
Journal	IET Smart Grid
Publisher	The Institution of Engineering and Technology
Publisher Date	2020-09-11
Access Restriction	Open
Rights License	Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/)
Subject Keyword	Central Controller Centralised Control Control of Electric Power System Current Limit Strategy Distributed Control Distributed-hierarchical Control Strategy Distributed-hierarchical Control Structure Distribution Network Hierarchical System IEEE 19-bus System Low Voltage Distribution Network Multivariable Control System Network Capacity Nodal Voltage References Node Voltage Node Voltage Violations Optimal Control Optimised P2P Transaction Levels Peer Controller Peer-to-peer Energy Market Peer-to-peer Energy Transactions Phase Decoupled P-Q Theory Power Distribution Control Power Market Power System Control Power System Economics Power System Managemen Power System Operation Power Transaction Levels Reactive Power Reactive Power Contributions Short-term Voltage Magnitude Variations System Voltage Unregulated P2P Transactions Voltage Control Voltage Mitigation Methodologies Voltage Profile
Content Type	Text
Resource Type	Article

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