| With the steady improvement of the global economy and the rapid development of the power industry,the total electricity consumption in each country increases substantially,which also leads the difference between peak and valley of power load expanded and highlights the problem of imbalance between power supply and demand.Energy storage technology,as an important technical support of energy transformation,can effectively be used to solve the contradiction between power supply and demand of power grid.At the same time,the development of energy storage is gradually shifting from prospective research to project demonstration due to the improvement of energy storage technology economy and the relevant government incentive policies.However,the operating benefits of the energy storage system on the user side are still not well reflected at the present stage,and the economic benefits of the investment of a single user are poor.How to obtain the maximum profit from many income methods as less investment cost as possible is the premise for the implementation of the user-side energy storage project and the construction of the power market.Therefore,this paper studies the optimal energy storage configuration and operation method based on the user side,and the main work is as follows:Firstly,the profit methods of user-side energy storage under multiple revenue models are studied.A user side of the energy storage profit method considering multiple revenue is proposed,which is set up in a mode of high incidence of energy storage in low storage and maximum demand electricity management for the users to cut the cost of electricity.The model of user side energy storage electric load demand is also proposed to gain profit through response,emergency power supply service.The economic benefits of user participation in a single revenue mode and a comprehensive revenue mode are compared through a realistic case.The results of the case show that the comprehensive revenue mode can increase the revenue source for the user side energy storage and shorten the payback period of the investment.Secondly,the optimal allocation and economic evaluation method for user-side energy storage considering multiple revenue are studied.A user-side energy storage allocation method considering multiple revenue models was proposed.Based on different revenue combinations selected by users,the model is proposed to optimize the allocation of energy storage capacity for users participating.The objective is to maximize net revenue in the whole life cycle of user-side energy storage in multiple revenue.At the same time,the evaluation model of energy storage configuration scheme under various economic indicators is established to comprehensively evaluate the energy storage configuration scheme on the user side.The validity and reliability of the proposed model are verified by a practical example.Thirdly,the rolling optimal operation method for user-side energy storage considering demand response is studied.Taking the daily load curve of the user side as the research object on the basis of load forecasting,a rolling optimal operation method for energy storage which can respond to the demand request of the power grid in real time is proposed.Considering the operation conditions of energy storage on the user side and the policy conditions of participating in the demand response comprehensively,the charging and discharging curve of energy storage was optimized with the minimum intraday operating cost of energy storage.The case analysis shows that the intraday rolling optimization method can fully exploit the economy of energy storage on the user side and maximize the energy storage income. |
