The Design Of The Next Generation Of Energy Storage System For Metro

Since urbanization and motorization have accelerated the development of urban rail transit rapidly,metros have higher requirements for the on-board energy storage system.In this thesis,the next generation of metro technology research and demonstration application are discussed based on "twelfth five-year" national science and technology support plan.Under such circumstances,this thesis focuses on the design of the on-board energy storage system from different aspects as follows:demand analysis,energy storage mode,energy storage component analysis,size configuration,circuit design and communication architecture.The study on energy management strategy of energy storage system is discussed in this thesis.All the results are verified by simulation and experiments.Specific work is summarized as follows:Firstly,as the theoretical foundation of the energy storage system,this thesis analyzed the demand for the energy storage system under different operating conditions combined with the train load characteristics.The energy of the storage system and maximum power are coupling calculated for the typical working conditions.According to the unit weight as constraint conditions,the energy storage elements of the next generation metro energy storage system is analyzed.Secondly,the test platform for energy storage component has been built as well as the monomer and module performance testing experiment have been completed.Moreover,it is found that these relatively complete experiments database provide a good data to support subsequent design.According to the experiment results,the charging and discharging performance of energy storage elements at different temperature are analyzed.Also,this result has provided theoretical guidance for configuration of energy storage.The equivalent circuit model of energy storage element has been discussed and the modeling has been completed to provide model support for the simulation work.Then the configuration method of energy storage has been analyzed;at last,the scheme of battery has been designed.Considered the integrity of the paper,the function and communication of energy storage system circuit and battery management system are designed.Thirdly,this thesis has analyzed and set the design goal of energy management strategy based on the energy flow in different working conditions.The strategy based on logical threshold energy management rules is studied.Based on the principle of maximizing energy storage system,this thesis has put forward the logic threshold energy management strategy considering the energy consumption of the operation interval,focuseds on the design and implementation of energy management strategy,and completed energy distribution and management of energy storage system under different operating conditions of trains.The feasibility of the energy management strategy has been verified by simulation,and the energy management strategy can realize reasonable flow and distribution of energy to meet the train running demand.This thesis compared the simulation results of two energy management strategies and analyzed the influence of different energy management strategies on the traction and discharge of energy storage systems.Finally,the correctness and rationality of the energy storage configuration are verified by the experiment of energy storage system.