Research On Electricity-Heat Joint Market Double Auction Clearing Strategy For Interconnected Regions Considering Flexible Resource Interaction

In recent years,the continuous increase in energy demand has put tremendous pressure on the operation of the energy system and the control of environment and climate change.The Integrated Energy System(IES),as an effective way to achieve multi-energy coupling and complementarity,and to improve energy utilization efficiency,has become a rapidly developing new form of energy carrying.At the same time,with the reform of the electricity market,the multi-energy market has attracted more and more attention from the society and academia,and the optimization of energy distribution through market transactions has become a current research hotspot.As energy coupling becomes closer,energy interconnection between regions has become a trend,and differences in energy supply and use characteristics in various regions can be complemented by energy transmission.At present,research on multi-energy markets at home and abroad is still in its infancy,and there are many aspects worthy of in-depth exploration,such as the participation of energy supply and demand parties,effective energy market trading mechanisms and clearing strategies,and the full use of flexible resources in IES.Therefore,based on the above background,this thesis studies the electricity-heat joint market double auction clearing strategy for interconnected regions considering flexible resource interaction.The main work of this thesis is as following:(1)The regional electricity-heat IES structure is analyzed,and the regional distribution network and thermal network models are established;based on the concept of energy hubs,models of independent and interconnected distributed energy stations are respectively proposed;for the user-side electric-heat loads,the electric water heater load model and the space heating load model are established respectively.(2)The interconnected regional electricity-heat joint market structure considering user loads interaction is constructed,and the bidding strategies for energy supply and demand sides are proposed;the clearing process of the energy retail market and the calculation method of social surplus are introduced,and the interconnected regional electricity-heat joint energy market clearing strategy model with the goal of maximizing the total social surplus in regions is established;the integrated demand response control strategy is proposed for electric and heating loads to respond to market clearing signals.Finally,the rationality and effectiveness of the proposed method are verified in the case study.(3)The interconnected regional electricity-heat joint market structure considering the interaction of multi-source energy storage is constructed,the operation mechanism of multi-source energy storage is analyzed and its model is established;The distributed energy station model with multi-source energy storage is established,and its market bidding strategy is proposed,the market clearing strategy model for interconnected regional electricity-heat joint energy considering the interaction of multi-source energy storage is established.Finally,the validity and feasibility of the proposed method are verified by case study.