| With the progress of energy storage technology and the increasingly mature commercialization,the important role of energy storage system in the current power grid has become increasingly prominent,and it has become a new functional complex based on energy storage and release.Currently,energy storage technology is widely used to various scenarios of the power system to promote new energy generation and consumption,alleviate load peaks,and improve grid operation efficiency.As to meet the needs of social development for safe,stable and efficient power energy.At the same time,the life cycle of the system is affected in many ways,and that is curial for how to accurately predict and evaluate the energy storage.Therefore,how to rationally and economically optimize the allocation of energy storage system has great research significant for the stability of the distribution network.Firstly,this paper illustrates the operating principle of battery energy storage and comprehend the working mechanism of battery energy storage.Which is related research on energy storage as a background,based on the research and analysis of the life characteristics of battery energy storage.It also from the three aspects of internal factors,external factors and comprehensive factors that affect battery energy storage life.The three main parameters of the battery’s discharge depth,discharge rate and effective discharge volume are selected to discuss the evaluation method of predicting battery life.Then,the characteristic parameters of battery life are quantified,which provides a new idea for the reasonable and optimal configuration of battery energy storage.Secondly,for the safety and economic issues of energy storage connected to the distribution network.Comprehensive consideration of the uncertainty of the output of the three new energy sources of wind,solar,and water,and combined with the energy storage system to balance the impact of distributed power sources on the grid.Then,a method for economic optimization of distributed energy storage is proposed.With energy storage system construction costs,operation and maintenance cost and benefits of the energy storage system to construct a full life cycle economic model;optimize the configuration of the energy storage system with the goal of optimal overall cost;test with the IEEE39-node wind/solar/water system and adopt genetic algorithm to solve the model.In the end,the optimal location and capacity of the energy storage system can be obtained,which can optimize the economy of the entire distribution network system.Thirdly,in order to enhance the rationality of the optimal configuration of battery energy storage,the battery energy storage life evaluation model is introduced on the basis of the optimization configuration method of distributed energy storage economy in Chapter 3.An optimized configuration method considering the charging and discharging strategy and energy storage life characteristics is proposed.At the same time,in order to improve the premature convergence of genetic algorithm in iterative optimization,an improved multi-group genetic algorithm is used to solve the problem,which improves the solution speed and convergence.The results show that the reasonable arrangement of charging and discharging strategies can obtain the optimal configuration of the energy storage system of the distribution network by this method.While ensuring that the battery energy storage reach the design life to improve the operation quality of the distribution network.That helps to optimize the configuration and investment decision-making of the battery energy storage more accurately.Finally,according to the research content and result of this article to sort out and summarize its shortcomings.And looks forward to the future research content and the development prospects of energy storage. |
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