Design And Implementation Of Photovoltaic Smart Meter System Based On Blockchain

In recent years,with the reform of the power system,distributed photovoltaic power generation projects have benefited many users.Photovoltaic smart meters have replaced traditional meters and are widely used.The access of massive smart meters has greatly increased the difficulty of control and cost investment,causing hidden dangers to the system and users.At the same time,the opacity of gird-connected transacations of power meters brings a crisis of trust to grid companies.Therefore,there is an urgent need for a solution that can control distributed photovoltaic smart meters and establish trusted transactions.Meanwhile,blockchain has begun to be applied in various fields due to its decentralization,traceability,non-tampering,and trust-building.Especially in the distributed Internet of Things field,the application prospect of blockchain is widely optimistic.The application system of massive photovoltaic smart meters constitutes a natural distributed energy network,and blockchain technology provides it with a safe,efficient and credible solution.In this paper,Hyperledger Fabric alliance chain technology is used to build a brand-new photovoltaic smart meter system based on blockchain,to realize the safe management and control of smart meter devices and the storage of trusted electricity transactions.It provides effective solutions for the security of electricity meter equipment management and on-grid transactions.The main tasks include:(1)Research and analyze the architecture and safety requirements of photovoltaic smart meter system,and design and implement the alliance chain architecture scheme suitable for the stable operation of the system.Specifically,in the consensus building hand,based on a comparative analysis of various alliance chain consensus algorithms,the most suitable consensus mechanism is selected;in the network construction hand,the appropriate number of nodes is selected according to the actual application scenarios of the consensus mechanism.Finally,the overall network construction of the blockchain is completed.(2)Using the IBE key management mechanism,design and implement a certification and authorization scheme for meter devices based on shadow devices and blockchain.First,bind the smart meter to the user's identity ID,and then use the secure cloud gateway to realize real-time authentication and authorization of the smart meter device.The hash deposit certificate in the scheme will be stored in the blockchain to ensure that the state information of the meter cannot be tampered with,and strengthen the security of the management and control of the terminal meter device.(3)Using the characteristics of blockchain decentralization,design and implement a blockchain-based electricity trading scheme.Users issue power demand orders,and verify the authenticity of the orders through signatures,and circulate orders and sign transaction contracts by blockchain.After the order is completed,the power grid company is notified to conduct transaction settlement and power dispatching,so as to realize a safe and reliable power trading environment.(4)Design and implement a prototype of a blockchain-based photovoltaic smart meter system,and analyze its security and test its function and performance to verify the system availability and stability,and provide a new solution for the application of blockchain to the energy Internet.