Aiming at the management difficulties existing in smart grids of distributed energy systems and the difficulty of dispatching power resources, a power network management system is proposed based on blockchain technology. The Ethereum is used as a development platform to build a distributed energy power interactive management blockchain. The proof-of-stake (PoS) mutation algorithm is utilized to establish a consensus mechanism for both power generation and consumption parties in the blockchain, and specify the bookkeeper on both sides of the transaction; the K-means clustering algorithm and the particle swarm optimization algorithm (PSO) are utilized to design distributed power scheduling strategies to further ensure the reliability of energy transaction distribution in the power grid, and ultimately realize the effective management of distributed energy under the power operation smart contract. The experimental results show that the deployment of the power interactive management blockchain in the smart grid effectively solves the problem of difficult and time-consuming distributed energy transactions, and improves the rationality of resource management in the power grid.