Research On Market Pricing Of Peak Shaving Auxiliary Service For Electrochemical Energy Storage Considering LCOE

The important commitment to "peak carbon by 2030 and carbon neutral by 2060"has given direction to the development of China’s energy industry,and the continuous introduction and implementation of relevant policies has emphasized the main position of renewable energy,represented by wind and light,in the future development of China’s new power system.In this context,the installed capacity and power generation of renewable energy in China has been increasing year after year.However,compared to traditional power generation such as thermal power and hydropower,the power output of renewable energy is volatile and uncertain,which has an impact on the safe and stable operation and reliability of the power grid;and the new types of loads added to the power load side in recent years have also increased the uncertainty on the demand side,thus making the peak-to-valley difference of the power grid expand continuously and increasing the peak regulation demand of the power grid.Electrochemical energy storage has good characteristics such as fast response,bidirectional regulation of storage and discharge,which can discharge at the peak of the system and charge and discharge at the trough,thus reducing the peak-to-trough difference of the grid and playing a role in peak regulation for the new power system.However,the current cost of electrochemical energy storage is relatively high,and China’s auxiliary services market is not yet sound,the value of electrochemical energy storage to provide peak regulation auxiliary services has not been fully measured,and the price mechanism to participate in the peak regulation auxiliary services market has not yet been established.Therefore,in the context of the "double carbon" target and the construction of new power systems,it is necessary to conduct research on the pricing of electrochemical energy storage in the peaking auxiliary services market,in order to ensure reasonable returns for electrochemical energy storage service providers,promote the healthy and sustainable development of China’s electrochemical energy storage industry,and thus ensure the safe and stable operation of new power systems mainly based on new energy.This will ensure the safe and stable operation of the new power system dominated by new energy sources.Firstly,this paper introduces the theoretical basis of the theory;secondly,it discusses the applicability of the levelized cost theory and constructs a life-cycle levelized cost model for electrochemical energy storage,considering the impact of the capital structure of energy storage projects and identifying the influencing factors;secondly,it considers the levelized cost of electrochemical energy storage and the charging and discharging optimization strategy,constructs a pricing model for the participation of electrochemical energy storage in peaking auxiliary services,and applies the dichotomous The model is solved using the dichotomous method and the nodal marginal tariff method.The empirical results show that:(1)the levelized cost is RMB 0.67/kWh,with the cost of the storage battery,replacement cost,recovered residual value and discount rate having a greater impact on the levelized cost;(2)the charging and discharging strategy obtained from the pricing model can identify blocked branches in the system and charge at 12-13 points and discharge at 18-21 points,which is effective;(3)the charging and discharging strategy in the pricing model can identify blocked branches in the system and charge at 12-13 points and discharge at 18-21 points.(3)the effect of electrochemical energy storage peaking in the pricing model is obvious,the blocking time of typical blocking branches in the system decreases by 58.82%and the blocking volume decreases by 65.4%,which fully relieves the system blocking;(4)the pricing of electrochemical energy storage peaking is RMB 717.6/MWh,which can stimulate the energy storage to charge and discharge at the right time and in the right amount to meet the power demand of customers in the distribution network.Finally,this paper puts forward four specific suggestions based on the research results:(1)Pay attention to the main influencing factors of cost,strengthen the investment in energy storage battery technology and recycling technology,and strengthen the management of project funds;(2)Ensure the flow of information in the power system and promote the various Participant information is open and shared to improve the efficiency and benefit of auxiliary services;(3)Fully compensate the cost of electrochemical energy storage peak regulation to encourage service providers to participate in the market;(4)Set time-of-use prices for system congestion to maximize Incentive effect.