Research On Electricity Market Trading Strategy Of Microgrid Group

With the development of distributed generation technology,more and more micro-grid groups formed by micro-grids integration are connected to grid to realize power generation,which effectively solves the problem of electricity production and consumption within micro-grid group.Also,it can sell excess electricity to some grid companies to obtain external income so that the phenomenon of abandoning wind/solar and the impacts of power fluctuation to grid companies can be reduced.In order to solve the problem of electricity production-consumption within micro-grid group,this paper designs an electricity trading strategy under two modes,including the market trading mechanism and microgrid bidding strategy.Details are as follows:(1)In the PowerPool market trading mode,the multi-agent based electricity market trading strategy is proposed for microgrid group.Firstly,the multi-agent based electricity market trading framework is introduced.Secondly,the improved unified pricing scheme considering economic,the electricity pricing scheme considering grid company reward-punishment,and the microgrid bidding strategy based on game theory and optimal profit are respectively given.Also,by using the simplex method and game-based Nash equilibrium solution to determine the optimal electricity sale plan,the production and distribution of electricity can be optimized.Solving the optimal electricity-purchasing model on the demand side to determine the optimal purchasing electricity plan can solve the problem of electricity consumption.Finally,by means of establishing the above theoretical model and comparing with the simulation results,the reasonablely and economy of the trading strategy are proved under the PowerPool trading mode.(2)In the bilateral market trading mode,the electricity market trading strategy of microgrid group based on block-chain technology is proposed.Firstly,the block-chain technology based microgrid group electricity market trading framework is introduced.Then,the improved trading rules and pricing scheme considering motivation,the electricity pricing scheme considering grid company transactions penalty,and the optimal microgrid bidding strategy considering market environment and optimal profit are respectively given.Also,the optimal electricity purchase-sale plan to solve the problem of electricity consumption is determined by the dynamic programming method and the improved queuing transaction rules.Finally,by means of establishing the above theoretical model and comparing with the simulation results,the feasibility and economy of the proposed trading strategy are proved under the bilateral trading mode.