基于分流模型PI控制的车网耦合系统低频振荡抑制方法  

Low-frequency oscillation suppression method for EMU-traction network coupling systems based on shunting model PI control

作　　者：逯华 耿民 刘明杰 王喜莲[1] LU Hua;GENG Min;LIU Mingjie;WANG Xilian(School of Electrical Engineering,Beijing Jiaotong University,Beijing 100044,China;Motor Train Maintenance Department of CRRC Tangshan Locomotive and Rolling Stock Co.,Ltd.,Tangshan Hebei 063035,China;Jinan West Locomotive Depot of China Railway Jinan Bureau Group Co.,Ltd.,Jinan 250117,China)

机构地区：[1]北京交通大学电气工程学院,北京100044 [2]中车唐山机车车辆有限公司动车检修部,河北唐山063035 [3]中国铁路济南局集团有限公司济南西机务段,济南250117

出　　处：《北京交通大学学报》2024年第5期118-129,共12页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家自然科学基金(50907004)。

摘　　要：高速铁路车网耦合系统电压低频振荡多发生在多台动车组同时轻载启动工况下,易引发牵引封锁,严重影响高速铁路的安全运行.针对低频振荡问题,以CRH3型动车组为研究对象,对低频振荡的产生原理和抑制方法进行了研究.首先,建立车网耦合系统阻抗模型,利用阻抗比伯德图分析低频振荡的产生机理;其次,设计一种分流模型PI控制器,利用仿真将分流模型PI控制器与传统PI控制器、自抗扰(Active Disturbance Rejection Control,ADRC)控制器、自适应自抗扰比例积分(Self-Adaptive Auto Disturbance Rejection PI,SAADR-PI)控制器进行性能对比;再次,提出一种基于分流模型PI控制的瞬态直接电流控制策略,并利用仿真分析该控制策略对低频振荡的抑制效果;最后,利用小功率实验平台进行分流模型PI控制策略与传统PI控制策略的对比实验.研究结果表明:在额定负载下采用分流模型PI控制器的动车组四象限变流器直流侧电压超调量为17.13%、调节时间为0.104 s、电压波动为±54 V,分流模型PI控制器提升了四象限变流器的动态性能;当6台采用分流模型PI控制策略的动车组同时轻载启动时,系统在0.4 s左右进入稳态,直流侧电压的调节时间为0.27 s,超调量为7.12%,稳定后的电压波动为±32 V,分流模型PI控制策略能够有效地抑制低频振荡现象,为高速铁路车网耦合系统低频振荡抑制的研究提供参考.Low-frequency voltage oscillations in high-speed railway EMU-traction network coupling systems frequently occur when multiple EMUs start simultaneously under light-load conditions.These oscillations can easily lead to traction blockades,significantly jeopardizing the safe operation of high-speed railways.Addressing this low-frequency oscillation issue,this study focuses on the CRH3 EMU to investigate the mechanism and suppression methods of low-frequency oscillations.First,an imped-ance model of the EMU-traction network coupling system is developed,and the generation mecha-nism of low-frequency oscillation is analyzed using impedance ratio Bode diagram.Second,a shunting model PI controller is designed,and its performance is compared through simulations with that of tra-ditional PI controllers,Active Disturbance Rejection Control(ADRC)and Self-Adaptive Auto Distur-bance Rejection PI(SAADR-PI)controller.Then,a transient direct current control strategy based on the shunting model PI control is proposed,and simulations are conducted to evaluate its suppression effectiveness on low-frequency oscillations.Finally,a comparative experiment between the shunting model PI control strategy and the traditional PI control strategy is carried out on a low-power experi-mental platform.The results show that the DC-side voltage overshoot of the four-quadrant converter in the EMU equipped with the shunting model PI controller is 17.13%,with a regulation time of 0.104 s and a voltage fluctuation of±54 V,indicating enhanced dynamic performance of the four-quadrant converter.When six EMUs using the shunting model PI control strategy start simultaneously under light-load conditions,the system stabilizes in approximately 0.4 s,with a DC-side voltage regu-lation time of 0.27 s,an overshoot of 7.12%,and a stabilized voltage fluctuation of±32 V.These findings confirm that the shunting model PI control strategy effectively suppresses low-frequency oscil-lations,providing valuable insights for further research on the suppression of such os

关 键 词：高速铁路 车网耦合系统 低频振荡 分流模型PI控制器 四象限变流器 

分 类 号：U223.8[交通运输工程—道路与铁道工程]