【作者】 李鹏；

【导师】 杨丰萍； 姜悦礼；

【作者基本信息】 华东交通大学 ， 电气工程（专业学位）， 2017， 硕士

【摘要】 城市轨道交通的发展能够缓解城市交通拥堵和改善城市空气质量,由于城轨车辆站与站之间路程短,启动频繁,在启动和制动的过程中会消耗掉大量的能量同时会释放出大量的能量,如果将城轨列车制动过程中释放的能量收集起来供启动时候利用,则会节省大量的电能。首先,结合城市轨道交通列车启动与制动的特点,选择双向DC/DC变换器作为储能回馈制动系统变流器主电路的拓扑结构,并且对城轨列车在制动过程中释放的能量进行研究,将列车所具有的初始动能减去制动过程中与铁轨之间摩擦力所做的功作为城轨列车在制动过程中所产生的能量,由此来计算储能系统容量大小。其次,将储能系统和双向DC/DC变流器作为一个系统,采用状态空间平均法对系统进行建模,推导了数学模型,控制系统采用电压外环、电流内环的双闭环经典PI控制,并且在MATLAB/SIMULIK的环境下对系统搭建仿真模型,来模拟仿真储能装置在充电和放电的状态下控制效果。最后将超级电容储能系统模型、牵引变电所模型、列车模型结合起来,构成城轨列车超级电容储能回馈系统。采用控制电机的运转方式来模拟城市轨道车辆的启动和制动,来观察在有储能回馈系统和无储能回馈系统状态下,列车在不同工况对供电网电压的影响。本论文结合城轨列车启动和制动过程对供电网电压影响和再生制动方式能量转换率较低的特点,采用超级电容储能装置将列车制动时产生的能量收集起来供列车启动时利用,这样弥补了列车启动造成供电网电压的降低和制动造成供电网电压的升高,又避免了再生制动受限于供电网电压的升高而造成的再生制动系统利用率不高的缺点。更多还原

【Abstract】 The development of urban rail transit can alleviate urba n traffic congestion and improve urban air quality.Due to the short distance between the city rail station and the station,the city rail trains start frequently and consume a lot of energy and release a lot of energy In the process of starting and braking.If the energy generated during the braking time can be used for city rail trains start-up,it will save a lot of electricity.Firstly,Combined with the characteristics of urban rail transit train starting and braking,the bidirectional DC / DC converter is chosen as the topology of the main circuit converter of the energy storage feedback braking system.And I also make research on the energy released during the breaking process,the energy used to calculate the size of the super capacity system is generated by the difference,which is the initial kinetic energy of the train minus the friction work between the tracks.Secondly,The converter system is modeled by using the state-space method and treating the super capacity and the b idirectional DC/DC converter as a system,Mathematical model of this rectifier topology is derived and control parameters of the control system are designed,which uses voltage-current double closed loop PI control method,the energy storage device is simulated in the state of charge and discharge by using the MATLAB/SIMULIK software.Finally,the super capacitor energy storage system model,traction substation model and train model are integrated to form a super capacitor energy storage system,the city rail vehicle start and brake is simulated by controlling the motor running mode to observe the influence of the train on the voltage of the power supply system under the condition of energy storage feedback system and no energy storage feedback system.This paper combines the influences of urban rail train starting and braking on the power supply network voltage and the low rate of the regenerative brake,proposing to collect the energy generated during the train braking in the super capacitor for the train restarts.This makes up for the power supply network voltage reduction caused by the start of the train and power grid voltage rise caused by the braking and avoids the lower energy conversion rate of the regenerative brake limited by the power supply network voltage rise.更多还原