Market Transaction Mode And Clearing Optimization Model For Independent Energy Storage Participating In Cross-regional Two-level Peak Regulation Auxiliary Service Of New Power System

With the goal of "carbon peaking and carbon neutrality" proposed,the new power system with high Penetration of clean energy is building in our country.The security and stability operation of power system has been greatly threatened,because of the fluctuation of load,wind and photovoltaic power at the same time.In order to further enhance the role of the market mechanism in optimizing the allocation of adjustable resources,at the same time,fully exploit the utility of energy storage,an emerging resource,in peak regulation auxiliary service market.It has important theoretical and practical significance to design mode and clearing optimization model of provincial and cross-regional peak regulation auxiliary service market.First of all,the boundaries of deep peak regulation auxiliary service market in intraregional and cross-regional are clarified based on the new energy consumption method of the system,and the intra-regional-cross-regional market connection framework is analyzed.According to the theory of market supply and demand,the mechanism of thermal power units and independent energy storage obtain benefits through deep peak regulation auxiliary service market is analyzed.The operation mode of deep peak shaving auxiliary service market in which independent energy storage and thermal power units compete on the same stage is proposed.Secondly,the market quotation models based on the operating cost of in deep peak regulation that depicts different market participants are described,which consider different operating characteristics of thermal power units and independent energy storage to provide deep peak regulation service,the demand for deep peak regulation and the competition between market participants.The market clearing optimization model based on the strategic quotation of market participants is constructed,which aiming at the minimum operating cost of the intra-regional deep peak regulation auxiliary service market.Finally,the profit mechanism of market participants in the cross-regional deep peak regulation auxiliary service market is analyzed.Based on the coupling relationship between the intra-regional and cross-regional markets,the market participants declaration model with the goal of maximizing the benefits of the two-level market is proposed,which consider the risk of profit reduction brought by the forecast error of deep peak regulation demand to market participants.On this basis,the two-level clearing optimization model for the cross-regional two-level deep peak regulation auxiliary service market is build,take the deep peak regulation volume of market participants participating in intra-regional and cross-regional markets as the decision variable,and the clearing of the intraregional market and the cross-regional market are regarded as the problem of upper and lower layers of the model respectively,and realize the optimal allocation of adjustable resources in intra-regional and cross-regional.The simulation results show that considering independent energy storage and thermal power units to compete on the same stage to participate in the deep peak regulation auxiliary service market,and the market operation mode of compensation based on the deep peak regulation cost of market participants can ensure the benefits of energy storage,which enable the energy storage industry to develop in a healthy and orderly manner.And the proposed cross-regional two-level peak regulation auxiliary service market clearing model can effectively utilize the optimal allocation of inter-regional peak regulation resources in a wider range,reduce abandonment of wind and photovoltaic power in the system,and avoid orderly power.To sum up,the optimization method for market clearing of deep peak regulation auxiliary services consider the cost of deep peak regulation under different operating modes of market participants,and taking into account the economics of market operation and the benefits of market participants,the two-level market clearing optimization model considering the coordinated optimization of provincial and cross-regional market clearing prices and clearing electricity,provide an important theoretical basis for the efficient and optimal allocation of peak regulation resources in the cross-regional two-level peak regulation auxiliary service market under the new power system.