In the field of energy Internet, blockchain-based distributed energy trading mode is a promising way to replace the traditional centralized trading mode. However, the current power blockchain platform based on public chain has problems such as low consensus efficiency and waste of computing resources. The energy trading platform based on the consortium chain has problems such as inability to attract users to join and collusion between alliances. We propose a microgrid trading framework based on proof of contribution (PoC). According to the contribution value, we randomly select nodes based on weights through verifiable random functions (VRF) in each round of consensus to form the next round of consensus committee. The proposed electricity trading framework not only improves the consensus efficiency of the blockchain, but also is suitable as an incentive mechanism to attract users to participate in the power blockchain. Experiments show that our framework is effective and the contribution value we designed is reasonable. Through our framework, we can motivate users to participate and make energy transactions more fair.

翻译：在能源互联网领域，基于区块链的分布式能源交易模式是替代传统集中式交易模式的一种有前景的方式。然而，当前基于公有链的电力区块链平台存在共识效率低和计算资源浪费等问题。基于联盟链的能源交易平台则存在无法吸引用户加入及联盟合谋等问题。我们提出了一种基于贡献证明（PoC）的微电网交易框架。根据贡献值，我们在每轮共识中通过可验证随机函数（VRF）基于权重随机选择节点，组成下一轮共识委员会。所提出的电力交易框架不仅提高了区块链的共识效率，而且适合作为吸引用户参与电力区块链的激励机制。实验表明，我们的框架是有效的，且设计的贡献值合理。通过该框架，我们能够激励用户参与，并使能源交易更加公平。