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能源交易可成为激励分布式非传统能源生产并满足日益增长的能源需求的有效途径。为实现高效的P2P交易，需在确保信息可靠性、安全性与隐私性的前提下建立自由交易市场。区块链技术虽为此提供了框架支撑，但其能耗极高且交易速度缓慢。此外，现有区块链模型均未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模型，通过引入新型交易更新机制降低能耗，并采用向买方提供无息贷款的方式提升交易速度。该模型将电力公司整合至P2P交易框架中，从而扩充了交易成员的交易选择。本文还探讨了交易定价策略。上述结论均已通过仿真验证，表明该模型通过增强安全性、提升速度及拓展交易选择，将有效促进P2P交易发展。所提模型亦将助力实现买卖双方均获益的能源交易价格。