Research On Multi-side Energy Storage Collaborative Clean Energy Optimization Utilization And Benefit Coordination Model

Global warming has become a basic consensus.At present,the core strategy of all countries in the world is low-carbon economic development.As a developing country with huge energy consumption,the Chinese government is committed to developing and utilizing clean energy,especially to achieving low-carbon development by replacing traditional coal-fired power generation with clean energy generation.However,in the process of clean energy development,there are huge challenges such as energy curtailment(such as wind power curtailment,photovoltaic power curtailment,and water power curtailment)and electric power limitation,which seriously hinder the further development and utilization of clean energy.How to alleviate the contradiction between the rapid development of clean energy power generation and the mismatch of peak shaving capacity,the insufficiency of transmission capacity and the reverse distribution of power supply and demand is an urgent problem to be solved.Based on the above considerations,this paper takes the important problems facing clean energy in China as the backgroundand the coordination of energy storage and clean energy as the grasp to studythe optimal utilization of clean energy and the benefit coordination model of energy storage participating from the aspects of the comprehensive evaluation of the value of energy storage to promote the use of clean energy,the optimization of power generation dispatch with energy storage on generation side,the grid-side energy storage to promote the grid-connected optimization of clean energy generation,and the user-side energy storage to participate in the optimization of integrated utilization of clean energy.The contents and innovations of this paper are as follows:(1)This paper studies the comprehensive evaluation of the value of energy storage to promote clean energy utilization,and constructs a fuzzy comprehensive evaluation model based on ANP-DEMATEL.Firstly,the value of energy storage is analyzed from three aspects of "generation,transmission,distribution and utilization" and the initial index set of energy storage promoting the use of clean energy is extracted based on the whole process of clean energy power generation.Secondly,according to the combination of subjective and objective index screening test method,the initial index set is deleted and merged based on the principle of index system construction,thus the multi-dimensional evaluation index system of energy storage promoting the use of clean energy is obtained.Finally,a fuzzy comprehensive evaluation model based on ANP-DEMATEL is constructed,and an example is used to analyze and verify the model.(2)This paper studies the optimization of the generation side energy storage coordination clean energy generation dispatch,and constructs the generation side energy storage and wind power hybrid energy dispatch optimization model and the generation side energy storage participating in peak shaving auxiliary service optimization model.The hybrid wind energy storage system is taken as the research object,and the objective of coordinated optimization is to minimize the amount of wind discarded.The optimal solution of coordinated optimization model is searched by robust optimization algorithm,which can reduce the influence of wind power uncertainty while eliminating the discarded wind and realize coordinated optimal operation of power grid.According to the abandoned wind sequence reported by the previous abandoned wind pre-evaluation and the demand function reported by the heat storage enterprises according to the optimized subscription model,a centralized transaction model for the participation of heat storage in peak shaving auxiliary services based on the abandoned wind pre-evaluation is proposed,which provides feasible decision-making basis and policy recommendations for the participation of energy storage on the generation side in the optimal utilization of clean energy.(3)This paper studies the optimization of grid-side energy storage to promote clean energy grid-connected generation,and establishes a joint allocation optimization model of energy storage and demand response in distribution network and a multi-objective optimization model of wind power absorption by source-load-storage coordination.A joint allocation optimization model of energy storage and demand response based on peak-to-valley demand side response and capacity double-level allocation for distribution network is constructed.NSGA-II algorithm is used to solve the problem,the overall structure of the combined electric-thermal system is built,and a coordinated optimal dispatching model of power system source-load-storage based on three-state partition method is constructed,which is conducive to improving the peak-shaving capacity of the system and carrying out clean energy elimination on the grid side.This study provides new ideas and decision-making basis for formulating energy storage implementation strategy.(4)In this paper,the user-side energy storage is optimized to participate in the aggregation and utilization of clean energy,and an optimization model considering the participation of electric vehicles,energy-storage micro-grid in power market dispatching and multi-energy market dispatching is constructed.Firstly,an optimal model of cooperative downwind storage dispatch for electric vehicles is constructed based on the optimization of wind power output and wind storage dispatch.Secondly,the framework of power market transaction is established,and the optimal dispatching model of energy-storage microgrid and power market is built,which includes generators,microgrids and intermediaries.Finally,a multi-energy market transaction framework including generators,micro-e-commerce,middlemen and natural gas providers is established,and a multi-energy transaction equilibrium model is constructed to provide decision-making basis for user-side energy storage participating in the aggregation and utilization of clean energy.(5)The benefit coordination of energy storage participating in the optimal utilization of clean energy is studied,and the benefit coordination model of energy storage participating in the optimal utilization of clean energy based on improved Shapley value is constructed.In this paper,the main factors affecting the distribution of benefits are analyzed,and the Shapley value method model is constructed.The Shapley value method is improved by considering the environmental impact and risk factors.The validity of the proposed model is verified by an example,and the influence of the change of two different impact factor indices of environmental impact and risk factors on the interests allocated by the stakeholders is discussed separately.It is helpful for decision makers to choose different proportion of impact factor indices when implementing the benefit allocation in the actual situation,so as to ensure that the stakeholders can obtain reasonable benefits.