摘要
高铁车网耦合系统（electric multiple units-traction network coupling system,ETNCS）低频振荡易引发牵引封锁,严重影响高速铁路安全运行,因此研究低频振荡的机理及其抑制方法具有重要意义。该文首先建立了ETNCS阻抗模型,并利用幅相频特性曲线分析了低频振荡现象的产生机理,其中一个重要的因素是传统比例积分（proportional integral,PI）控制器无法对输入误差信号中的交流分量实施有效抑制。随后,为解决这一问题,提出一种自适应自抗扰比例积分（self-adaptive auto disturbance rejection PI,SAADR-PI）控制器。该控制器一方面继承了自抗扰控制器响应速度快、抗干扰能力强的优点,另一方面可通过fal函数自动调节PI参数使系统保持自适应能力,将其应用到瞬态直接电流控制策略中可提高系统的动态响应速度,增强系统的鲁棒性能。最后仿真和实验结果表明,基于SAADR-PI控制器的瞬态直接电流控制策略具有更好的控制性能,并能有效地抑制ETNCS低频振荡。
Low frequency oscillation（LFO） of high-speed railway Electric Multiple Units-traction network coupling system（ETNCS） can easily lead to traction blockades, which seriously affects the normal operation of high speed railway system. Thus, it is important to study the LFO mechanism of ETNCS and its suppression methods. Firstly, the impedance model of ETNCS was established in the paper. Amplitude and phase frequency characteristic curves were displayed to reveal the mechanism of the LFO phenomena. One of the main reasons is that traditional proportional integral（PI） controller cannot effectively suppress the alternating component of the input error signal. Then to solve this problem, self-adaptive auto disturbance rejection proportional integral（SAADR-PI） controller was proposed in this paper. On the one hand, this controller inherits the advantages of auto-disturbance-rejection controller in terms of quick response speed and strong anti-interference ability. On the other hand, the PI parameters can be adjusted automatically by the fal function to keep the system adaptable. And SAADR-PI controller was applied into transient current control strategy, which can improve dynamic response speed and enhance robust performance of the system. Finally, simulation and experimental results show that transient direct current control strategy based on SAADR-PI controller not only has superior control performance, but also can effectively suppress the LFO of ETNCS.
作者
许加柱
程慧婕
黄文
刘裕兴
陈治宇
安柏楠
XU Jiazhu;CHENG Huijie;HUANG Wen;LIU Yuxing;CHEN Zhiyu;AN Bonan(College of Electrical and Information Engineering,Hunan University,Changsha 410082,Hunan Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2018年第14期4035-4045,共11页
Proceedings of the CSEE
基金
国家自然科学基金项目(514770044,514770046)~~
关键词
高速铁路
车网耦合系统
低频振荡
阻抗模型
自适应自抗扰比例积分控制器
high speed railway
electric multiple units-traction network coupling system （ETNCS）
low frequencyoscillation （LFO）
impedance model
self-adaptive auto disturbance rejection proportional integral （SAADR-PI） controller
