Research On Operating And Collaborating Model Of Virtual Power Plant Based On Blockchain Technology

Virtual power plants aggregate a variety of distributed energy resources(DER)to achieve the goal of minimum economic cost and environmental cost,while maintaining grid balance.Nowadays,with the shortage of fossil energy and the rapid expansion of distributed energy,how to improve the permeability of new energy generation and the stability and occupancy of distributed generation has become one of the most urgent tasks.With the increase of the number of participants in the virtual power plant,the traditional centralized scheduling method can not meet the needs of the development of virtual power plant.Blockchain technology is composed of distributed storage technology,asymmetric encryption technology,digital digest technology and other new computer technologies.Because of its decentralization,anonymity,transparency and other characteristics,it is suitable to solve the problem of mutual distrust and low efficiency in many traditional industries.In the distributed heterogeneous environment,it is difficult to identify the authenticity of multiple data and the credibility of other der in virtual power plant.This paper analyzes the problem of Der cooperation in virtual power plant under the background of power Internet of things,proposes a decentralized scheduling and control model of virtual power plant,and uses blockchain technology as a means of Der cooperation control.In this paper,the virtual power plant(VPPBN)is proposed to store the data in the virtual power plant.VPPBN is designed and implemented in the Ethereum environment.The feasibility of VPPBN is verified by choosing Ethereum private chain as the experimental platform.Using solidity as programming language and smart contract as system interface,the functions of power energy transaction,block maintenance main body election and power fee settlement among der are designed.The security of VPPBN is tested when the subject is silent and under malicious attack.The experimental results show that VPPBN can realize the main functions of virtual power plant and has high security.In order to reduce the probability of unfair subjects and ensure the fairness of VPPBN,a consensus algorithm based on reputation and contribution is proposed to replace the consensus algorithm of randomly generated maintenance subjects.Based on the fact that the trust degree of multi-agent in virtual power plant is high,but there are communication failures and malicious agents,an improved consensus algorithm bncm for Multi-Agent in virtual power plant is proposed.The design of multi-agent first communicates with the block maintenance agent.If any multi-agent disagrees with the consensus result,then three sections of consensus will be started.This paper uses docker to design an experimental simulation system to test the feasibility and performance of the consensus mechanism.The results show that bncm is feasible in the virtual power plant environment,the fault tolerance of the algorithm is the same as pbft consensus algorithm,and the performance of the algorithm is better than pbft consensus algorithm in the case of low error rate.