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Frontiers in Energy

ISSN 2095-1701

ISSN 2095-1698(Online)

CN 11-6017/TK

Postal Subscription Code 80-972

2018 Impact Factor: 1.701

Front. Energy    2023, Vol. 17 Issue (2) : 189-197    https://doi.org/10.1007/s11708-023-0873-9
PERSPECTIVE
P2P energy trading via public power networks: Practical challenges, emerging solutions, and the way forward
Yue ZHOU, Jianzhong WU(), Wei GAN
School of Engineering, Cardiff University, Cardiff CF24 3AA, Wales, UK
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Abstract

Peer-to-peer (P2P) energy trading is an emerging energy supply paradigm where customers with distributed energy resources (DERs) are allowed to directly trade and share electricity with each other. P2P energy trading can facilitate local power and energy balance, thus being a potential way to manage the rapidly increasing number of DERs in net zero transition. It is of great importance to explore P2P energy trading via public power networks, to which most DERs are connected. Despite the extensive research on P2P energy trading, there has been little large-scale commercial deployment in practice across the world. In this paper, the practical challenges of conducting P2P energy trading via public power networks are identified and presented, based on the analysis of a practical Local Virtual Private Networks (LVPNs) case in North Wales, UK. The ongoing efforts and emerging solutions to tackling the challenges are then summarized and critically reviewed. Finally, the way forward for facilitating P2P energy trading via public power networks is proposed.

Keywords distribution network      local virtual private network      network charges      peer-to-peer (P2P) energy trading      practical implementation.     
Corresponding Author(s): Jianzhong WU   
Online First Date: 17 May 2023    Issue Date: 29 May 2023
 Cite this article:   
Yue ZHOU,Jianzhong WU,Wei GAN. P2P energy trading via public power networks: Practical challenges, emerging solutions, and the way forward[J]. Front. Energy, 2023, 17(2): 189-197.
 URL:  
https://academic.hep.com.cn/fie/EN/10.1007/s11708-023-0873-9
https://academic.hep.com.cn/fie/EN/Y2023/V17/I2/189
Fig.1  Existing and potential sites of solar PV power plants of this case in North Wales.
Fig.2  Indicative electricity import and export prices in the county.
Category Method Function Advantage Disadvantage
Technology-oriented solutions Sensitivity analysis-based network permission [25] Tackle both voltage issues and line congestion Respect network operational constraints and reduce peak network demand for P2P energy trading Not able to address the problems brought by existing network charging regulations
Network constrained P2P energy trading [26]
Line flow constraints-embedded bilateral trading [27] Tackle line congestion
Market capacity-based congestion management [28]
Local information-based voltage management [29] Tackle voltage issues
Grid influenced peer-to-peer energy trading [30] Reduce peak network demand
Network-charing solutions Graph-based network loss allocation [31,32] Reflect and signal the network losses Provide the incentive for reducing network losses in P2P energy trading Network losses only account for a very small percentage of electricity bills
Current/power tracing-based network loss allocation [33,34]
Least-cost energy path optimisation [35]
Loss allocation with diminished cross-subsidisation [36]
Locational marginal pricing mechanisms [3740] Reflect and signal all the major operational network issues including congestion and losses Provide accurate incentive for reducing network losses and congestion at the same time Require high-resolution real-time data exchange and do not reflect the network replacement and reinforcement costs
Exogenous network charging methods [41,42] Reflect and signal all the long-term and short-term network costs Simple, good scalability, able to reflect a wide range of costs, and not requiring high network digitalisation level Oversimplified so being difficult to provide highly reflective and accurate incentive
Tab.1  Summary and comparison of existing solutions on P2P energy trading through public power networks
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