多能源市场环境下综合能源服务商的需求响应策略研究

Equilibrium Strategy Analysis of Demand Response for Integrated Energy Service Provider Participating in Multi-energy Market Transaction

随着综合能源系统的发展及其市场化运行的推进,研究多能源市场环境下综合能源服务商的需求响应策略,具有重要的理论和现实意义。首先建立多个综合能源服务商与电力、天然气市场互动的双层决策模型,其中上层模型描述发电商和天然气商以供应函数投标方式分别参与电力、天然气市场竞争的博弈行为,下层模型描述多个综合能源服务商响应电力、天然气市场价格,进行购电、购气、用电、用热策略以及天然气调度策略决策的综合需求响应行为。利用势博弈理论求解该双层模型,将上层模型的求解转化为电力、天然气市场序数势函数的求解,将下层模型的求解转化为精确势函数的求解,并从理论上证明了双层模型解的唯一性。在此基础上,考虑到实际应用中信息的不完全性,利用分布式算法对模型进行求解。最后算例仿真表明,采用综合需求响应能减小电力、天然气市场的价格差异,增加需求侧利润,增加社会福利,提高平均用电效用系数和平均气转电效率,均能增大社会福利。

With the development of integrated energy system and the promotion of its marketization operation,it is of great significance to study the equilibrium strategy of demand response for integrated energy service providers in the multi-energy market environment.Firstly,a bi-level decision model of integrated energy service providers interacting with the electricity and gas markets is developed,where the upper problem describes the games of power generators and gas companies competing in the electricity and gas markets respectively by bidding as a supply function.The lower problem describes the integrated demand response behavior of integrated energy service providers making decisions on electricity and gas purchasing,electricity and heat consuming and gas dispatching according to the market prices for electricity and gas.In order to solve the bi-level model,the solution of the upper problem is transformed into the solution of the ordinal potential function of the electricity and gas markets respectively,and the solution of the lower problem is transformed into the solution of the exact potential function,and the uniqueness of the solution for the bi-level model is theoretically proved.Considering the incompleteness of information in practical application,the distributed algorithm is used to solve the bi-level model.Finally,the simulation results show that the use of integrated demand response can reduce price differences in the electricity and gas markets,increase the demand-side profits,add the social welfare,and raise the average electricity utility coefficient and average gas-to-electricity efficiency,both of which will promote the social welfare.