P2P trading of energy can be a good alternative to incentivize distributed non-conventional energy production and meet the burgeoning energy demand. For efficient P2P trading, a free market for trading needs to be established while ensuring the information reliability, security, and privacy. Blockchain has been used to provide this framework, but it consumes very high energy and is slow. Further, until now, no blockchain model has considered the role of conventional electric utility companies in P2P trading. In this paper, we have introduced a credit blockchain that reduces energy consumption by employing a new mechanism to update transactions and increases speed by providing interest free loans to buyers. This model also integrates the electric utility companies within the P2P trading framework, thereby increasing members trading options. We have also discussed the pricing strategies for trading. All the above assertions have been verified through simulations, demonstrating that this model will promote P2P trading by providing enhanced security, speed, and greater trading options. The proposed model will also help trade energy at prices beneficial for both sellers and buyers.

翻译：P2P能源交易可作为一种有效激励分布式非常规能源生产并满足日益增长的能源需求的替代方案。为实现高效的P2P交易，需建立自由交易市场，同时确保信息可靠性、安全性与隐私性。区块链虽已被用于提供该框架，但其能耗极高且速度缓慢。此外，至今尚无区块链模型考虑传统电力公司在P2P交易中的作用。本文提出一种信用区块链，通过采用新的交易更新机制降低能耗，并通过向买方提供无息贷款提升交易速度。该模型还将电力公司整合至P2P交易框架中，从而增加成员交易选项。我们还讨论了交易定价策略。上述所有论断均通过仿真验证，表明该模型将通过提供更强的安全性、更快的速度及更多交易选项促进P2P交易。所提出的模型还将有助于以对买卖双方均有利的价格进行能源交易。