【作者】 肖大帅；

【导师】 郭世明；

【作者基本信息】 西南交通大学 ， 电力电子与电力传动， 2012， 硕士

【摘要】 在城市轨道交通系统中,当城轨列车处于再生制动工况时,能量从列车回馈至直流供电网,这将会引起供电网电压的上升,危害电网上其他用电设备的安全。为了避免这一现象,目前主要采用吸收电阻将列车制动能量以热量的方式消耗掉,造成隧道温度上升和能量浪费。如何将城轨列车再生制动能量回收利用成为业内关注的热点之一本文以超级电容储能的方式进行能量回收。首先进行计算城轨车辆再生制动能量。并以此为根据,计算多辆车的再生制动能量。利用列车运行时的电流及运行距离的实测数据搭建多辆地铁列车运行的制动仿真,并研究在不同发车间隔下车辆制动对供电母线电压波动的影响,以确定多车运行时储能容量的选择。其次介绍了超级电容工作原理及其优缺点。并根据城轨列车再生制动能量和功率大小选择超级电容器。确定超级电容的配置方案,对超级电容进行串并联组合。再次,为了实现再生制动能量在城轨列车与超级电容器之间的双向流动,本文引入了半桥型Buck/Boost双向DC/DC变换器,建立了双向DC/DC变换器Buck和Boost工作方式下统一的数学模型,并研究其的控制策略；以及储能模块内超级电容分层式飞渡电容均压控制策略和储能模块间偏置电流均压控制策略。利用MATLAB/SIMULINK建立储能模块间偏置电流法均压控制的仿真模型,并进行仿真分析。最后,文章搭建200W储能模块样机,并通过实验验证储能模块内均压控制策略的可行性,以及主电路控制策略的可行性。储能系统采用模块化的设计能方便的通过改变串联的储能模块数量以适应不通电压等级城市轨道交通供电系统。更多还原

【Abstract】 In urban rail transit, when train is in regenerative braking condition, the regenerative energy feedback to DC power supply network from the train, which will cause the supply network voltage rise, endangering the safety of the electrical equipment on the power network. To avoid this phenomenon, the current way is to consume the braking energy in the form of heat by absorption resistance; this caused tunnels temperature rise and energy waste. How to use regenerative braking energy circularly will be the focus.In this paper, the supercapacitor energy storage was used to design the energy recovery system. First, calculation the regenerative braking energy of urban rail transit vehicle. And, accordingly, calculation regenerative braking energy of multi-vehicle, baste on measured data of current and distance, build brake simulation of more cars subway train running, and to study the braking a vehicle under the influence of different grid spacing on the power supply bus voltage fluctuations, to determine the choice of the energy storage capacity of the multi-vehicle run-time.Secondly, introduce the working principle and the. advantages and disadvantages of the supercapacitor, according to the regenerative braking energy and power of the Trains, to select the supercapacitor. Determine the series and parallel combination program of the super capacitorAgain, in order to achieve the two-way flow of regenerative braking energy between urban rail trains and supercapacitor, introduced a half-bridge type of the Buck/Boost Bi-directional DC/DC converter, and establishment the unified mathematical model of the bi-directional DC/DC converter, and its control strategy; layered fit capacitor voltage balance control strategies in energy storage module, And bias current balance control strategy between energy storage modules.Finally, the article builds a200W energy storage module prototype, and verified the feasibility by experiment of the strategy of balance control in the energy storage module, and the main circuit control strategy. The storage system uses a modular design can adapt to different voltage levels of urban rail transit power supply system by changing the number of storage modules.更多还原