This paper proposes a zone-based privacy-preserving billing protocol for local energy markets that takes into account energy volume deviations of market participants from their bids. Our protocol incorporates participants' locations on the grid for splitting the deviations cost. The proposed billing model employs multiparty computation so that the accurate calculation of individual bills is performed in a decentralised and privacy-preserving manner. We also present a security analysis as well as performance evaluations for different security settings. The results show superiority of the honest-majority model to the dishonest majority in terms of computational efficiency. They also show that the billing can be executed for 5000 users in less than nine seconds in the online phase for all security settings, demonstrating its feasibility to be deployed in real local energy markets.

翻译：本文针对本地能源市场中市场参与者实际能耗与投标值的偏差问题，提出了一种基于区域的隐私保护计费协议。该协议将参与者在电网中的地理位置纳入考虑，以实现偏差成本的分摊。所提出的计费模型采用多方安全计算技术，以去中心化且保护隐私的方式精确计算个体账单。我们还针对不同安全设置进行了安全分析及性能评估。结果表明，在计算效率方面，诚实多数模型优于不诚实多数模型。同时，在所有安全设置下，该计费方案可在在线阶段以少于九秒的时间处理5000名用户的计费任务，证明了其在真实本地能源市场中部署的可行性。