| A research on Energy Storage System (ESS) is one of the key technologies of Internal Combustion-Linear Generator Integrated Power System (ICLGIPS) applications. As a new type hybrid power system, ICLGIPS is mainly consisted of Components of Combustion Chamber for Four-stroke Internal Combustion Engine, Linear Electric Generator, the reversible electric energy storage system and the control unit, and can be used in Hybrid electric vehicle to replace the traditional internal combustion engine to achieve clean and efficiency use of energy. The most significant characteristic of ESS is to achieve the objective of energy storage and bi-directional high efficiency energy flow under the conditions that short time, high current and wide EMF (Electromotive force) range, and to respond quickly and accurately. This dissertation follows ESS of ICLGIPS as the research object and has depth systematic analysis to structure and parameters design of ESS, modeling and simulation, energy flow control stategy, experimental verification and applications. The work is supported by the National Advanced Technology Research and Development Plan of China (863 No.2006AA05Z236) and National Natural Science Foundation of China (No.50876043).In order to meet the requirements of bi-directional high efficiency energy flow and conversion for ICLGIPS, a novel ESS and its control method for ICLGIPS are proposed with innovative, practicability and high efficiency as the guiding principle. The use of series-parallel switchover of Ultra-capacitor (UC) banks and optimization designed bi-directional DC-DC Power Converter (BDPC) combination in the novle ESS to achieve the design concept that a low-voltage level of the variable voltage power supply system. Based on theoretical analysis, simulation and experiment research are studied, all the simulation results and experimental results justify validities and effectiveness of design.The models are built based on anslysis and design of components for ESS, include hybrid power model that composed of batteries and UC banks, BDPC model, H-bridge converter model, linear generator (LEG) model and controller model. And simulation model of the whole ESS is schemed, the simulation results justify the correctness of the model. The accuracy of real-time control and efficiency of energy flow meet well the requirements of ICLGIPS.Energy flow control strategy is an important part in the design of ESS and the main factor to affect efficiency. In order to ensure a stable, reliable and efficient operation for the whole system, an optimal energy flow control strategy is needed generally to make ESS have high accuracy in the steady state and fast response capability in the transient state. Bi-directional four operating modes of energy control strategy are proposed, and the four operating modes are forward-buck provide energy, forward-boost provide energy, reverse-buck recovery energy and reverse-boost recovery energy. The BDPC controller based on fuzzy control algorithm and the digital PID controller of H-bridge converter are designed, and parameters of the digital PID controller are optimized with genetic algorithm. So reasonable and effective controlling of energy flow is achieved. The effectiveness of theoretical analysis and control strategy is verfied by simulation, and the system works safely and reliably with high efficiency.To further verify the effectiveness and practicality of theoretical analysis, design and control strategy for ESS, the ESS controller based on the Digital Signal Processor (DSP-TMS320F2812) is designed. The experimental research of a small physical prototype of the ESS is implemented by a DSP-based development platform in the laboratory, and the test is done in bi-dircetional operating modes with a small permanent magnet DC motor. An experimental prototype of ESS for ICLGIPS is developed, the experiment research is implemented by the experiment system, and the experiment results show that the novel ESS which designed and the energy flow control strategy which proposed can meet high efficiency requirements of the system.The novel ESS and its control method for ICLGIPS have been presented based on the objective of improving energy conversion efficiency and transfer efficiency, so the function of energy storage, energy conversion and energy recovery can be achieved. The application is not just limited to ICLGIPS, so this dissertation follows the application for ICLGIPS as the base case and extends the application research to other systems. Based on comparative analysis to conventional motor drive system, the proposed novel ESS as the motor drive system of Electric vehicle (EV) to achieve regenerative braking is studied, by means of simulation on Matlab/Simulink platform, the comparative analysis on three situations adopting different regenerative braking ways is performed, and the feasibility and effectiveness of the proposed method are verified by simulation results. The proposed ESS is suitable for the systems which based on motor as electrical power and bi-directional energy flow, such as Hybrid electric vehicle (HEV), pure EV, power buffer system, power system and regenerative, it has great advantages compared to conventional methods and has important theoretical guidance and practical application value to the domestic research for improving the energy conversion efficiency and transfer efficiency.
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