储能系统双向直流变换器及其控制策略研究

发布时间：2018-02-26 19:26

本文关键词： 储能系统双向DC/DC变换器交错并联能量管理三段式充电　出处：《哈尔滨工业大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着化石燃料的日趋枯竭，太阳能、风能等可再生能源以其能量可再生、清洁无污染的优点受到人们越来越多的关注，以可再生能源为基础的微网发电系统获得了较快发展。然而由于风能、太阳能等新型能源的间歇性与不稳定性，使得可再生能源发电与微网系统的稳定性、实用性大大降低。为了克服这些缺点，目前公认的方法为增加储能环节，保证系统在不同工作状况下能量的稳定流动，维持系统持续稳定工作。本文在总结双向DC/DC变换器的发展现状后，采用带耦合电感的二重交错并联Buck-Boost拓扑作为储能系统主电路拓扑结构，并详细分析了主电路的工作方式，研究了主电路零电流软开关特性、并联支路均流特性，研究了耦合系数对主电路性能的影响。该拓扑的主要优点是，可以实现开关管的零电流软开通，并且解决了二极管的反向恢复功耗问题，均流特性好，电流纹波小，电路结构紧凑。本文建立了主电路两种模式的小信号模型，设计了双闭环控制器，分析了闭环系统稳定性，经仿真实验验证，，系统响应迅速，稳态精度高。针对包含可再生能源、蓄电池储能系统、负载的三端直流母线发电系统，制定了一套完整的基于状态切换的储能系统能量管理策略，并通过MATLAB仿真验证了该控制策略的正确性，有效性。最后搭建硬件实验平台，使用TI公司的DSP芯片TMS320F28027作为系统控制器，进行了储能系统的开环和闭环实验，验证了主电路参数设计的正确性，以及系统能量管理策略的有效性、快速性。
[Abstract]:With the depletion of fossil fuels, more and more attention has been paid to the renewable energy, such as solar energy, wind energy and so on, because of its advantages of renewable energy, clean and pollution-free. The microgrid power generation system based on renewable energy has developed rapidly. However, because of the intermittent and instability of new energy sources, such as wind energy and solar energy, the stability of renewable energy generation and microgrid system is made. In order to overcome these shortcomings, the widely accepted methods are to increase the energy storage link, ensure the steady flow of energy in different working conditions, and maintain the continuous and stable operation of the system. After summing up the development of bi-directional DC/DC converter, the dual interleaving parallel Buck-Boost topology with coupling inductor is adopted as the main circuit topology of the energy storage system, and the working mode of the main circuit is analyzed in detail. In this paper, the characteristics of zero-current soft switch and shunt current sharing of main circuit are studied, and the influence of coupling coefficient on the performance of main circuit is studied. The main advantage of this topology is that the zero-current soft switching of switch tube can be realized. The reverse recovery power problem of diode is solved, the current sharing characteristic is good, the current ripple is small and the circuit structure is compact. In this paper, a small signal model of two modes of main circuit is established, a double closed loop controller is designed, and the stability of the closed loop system is analyzed. The simulation results show that the system has fast response and high steady-state precision. For the three-terminal DC bus power generation system with renewable energy, storage battery system and load, a complete energy management strategy of energy storage system based on state switching is developed. The correctness and effectiveness of the control strategy are verified by MATLAB simulation. Finally, the hardware experiment platform is built. The open loop and closed loop experiments of the energy storage system are carried out by using the DSP chip TMS320F28027 of TI as the system controller, which verifies the correctness of the main circuit parameter design and the effectiveness of the system energy management strategy. Rapidity.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM46

【参考文献】