Blockchain-based electricity trading method and system in virtual power plant environment

A method for trading electricity between distributed energy equipment and users based on block chain, comprising:

• S1. based on a planned load demand of user i during/period, a distributed energy equipment output forecasting data of user i during/period, an energy storage device state of user i during a previous & period and a purchase price and a sale price of a trading with a virtual power plant of user i during the previous t period, with a goal of minimizing a planned electricity cost of the user i during t period, optimizing a cost of the user i participating in the electricity trading, determining a planned purchase electricity quantity or sale electricity quantity of the trading between the user i and the virtual power plant, as well as a planned charging capacity or discharging capacity of the energy storage device, and obtaining an initial trading plan of user i during t period;
• S2. based on the initial trading plan of the user in the virtual power plant, constructing a non-cooperative game model among multiple users and the virtual power plant, determining a purchase price, a sale price and a demand response compensation price of a trading between the user and the virtual power plant during t period;
• S3. according to the purchase price, the sale price and the demand response compensation price of a trading between the user and the virtual power plant during t period, determining a final load demand of user i, a charging capacity or discharging capacity of the energy storage device, as well as a purchase electricity quantity or sale electricity quantity of a trading with the virtual power plant during t period, and forming a final trading scheme indicating the output power for each distributed energy equipment;
• and
• S4. based on the final trading scheme during t period, matching both trading parties, generating a trading contract and performing a verification;
• S5. recording real-time trading data in a block chain in a form of blocks, and executing a violation management and a payment management;
• and
• S6. powering, by the distributed energy equipment to the user according to the final trading scheme;
• wherein the step S3 comprises:
• according to the purchase price, the sale price and the demand response compensation price of a trading between the user and the virtual power plant during t period, with a goal of minimizing the cost of the user, optimizing the distributed energy output and the demand response of the user, determining the purchase electricity quantity or sale electricity quantity of a trading between the user and the virtual power plant, as well as the charging capacity or discharging capacity of the energy storage device, and forming the final trading scheme of the user.