Research On Demand Side Management Pricing Strategy And Energy Scheduling For Energy System

With the depletion of traditional fossil energy and the increasing demand for energy from users,the disadvantages of traditional energy network are gradually exposed.The demand side management technology has been widely concerned by the academia for its flexible,reliable response,rapid economic and environmental protection.Under the framework of smart grid,demand side management can guide users to use off-peak electricity with price as incentive.Then the peak-to-average ratio of electricity load can be reduced and the stability of power system can be improved.Meanwhile,with the deepening reform of the energy market,the integrated energy system will become an important development direction of future energy supply.Therefore,the integrated demand side management for multi-energy system has emerged at the historic moment,which enables all types of energy users to participate in demand response plan.In this way,the complementary advantages of energy can be brought into full play,so as to achieve the economic and reliable operation of the energy system.Based on the game theory and taking demand side management as the starting point,this paper focuses on the pricing and economic dispatch strategy under the framework of smart grid,the multi-energy market pricing and energy dispatch strategy under the framework of multi-energy system.The aim is to improve the economic efficiency of the energy market on the premise of ensuring the efficient and stable operation of the energy system.The main research contents of this article are as follows:First of all,the economic dispatch mechanism is proposed to ensure the stability of the electricity market and the equilibrium of pricing strategy.The economic dispatch problem for smart grid is modeled as a bi-level game.In the wholesale market,the negotiation of the wholesale price between generation company and multiple utility companies is modeled as a Nash bargaining problem,and the NBS(Nash Bargaining Solution)bargaining strategy is adopted to ensure the fairness of the wholesale pricing.In the electricity retail market,a cooperative game model is established for multiple utility companies,and a profit distribution strategy based on Shapley value method is proposed to ensure the cooperative efficiency.Furthermore,a distributed algorithm based on the gradient method is designed to search for the optimal retail price and consumption of electricity.The simulation verifies the uniqueness of the bargaining solution in the wholesale market and the effectiveness of the pricing strategy in the retail market.Further,this paper studies the integrated demand side management for regional integrated energy system and considers the multi-energy retail market including an energy hub and multiple building users.The competition relationship of multi-energy among users is modeled as a non-cooperative energy consumption game.Then the existence and unique condition of Nash equilibrium is given.Considering the privacy of user information,the distributed multi-energy consumption control algorithm based on duality theory and gradient descent method is designed.Furthermore,the profit model of energy hub is proposed based on linear programming theory.The production strategy of energy hub can be optimized,and the real time supply-demand balance of energy system can be achieve.The simulation results verify the effectiveness of the pricing strategy and the necessity of the energy hub production strategy.