摘要
针对高速铁路出现牵引网网压低频振荡导致多个动车所的多台动车组牵引封锁现象,首先建立动车组线侧脉冲整流器状态空间模型;其次对动车组整流器设计了一阶非线性自抗扰控制器(active disturbance rejection control,ADRC)来替换传统的基于线性比例-积分(proportional integral,PI)控制器的瞬态电流控制策略(transient current control strategy,TCCS);随后从设置过渡过程,计算扩张状态观测器等方面展开,将外界扰动和系统内部扰动归算为总扰动,并给出相应的动态非线性补偿;最后,在Matlab/Simulink平台上搭建基于传统PI控制器和基于ADRC控制器的TCCS的双重化整流器模型,对比分析后得出ADRC控制具有更强的鲁棒性结论。为进一步验证ADRC控制效果,还将该仿真模型接入牵引网系统链式仿真模型中,发现该控制策略在具有较强鲁棒性和对参数不敏感性的同时,对牵引网网压低频振荡过电压有着较好的抑制效果。
Low frequency voltage oscillation in high-speed railway traction network may lead to many traction blockade accidents. Aiming at the phenomenon, a state space model of line-side pulse rectifier in Electric Motor Unit（EMU） is constructed. Then a first-order nonlinear Active Disturbance Rejection Control（ADRC） is designed to replace traditional Transient Current Control Strategy（TCCS） considering linear Proportional Integral（PI） controller. Transition process is set up and Extended State Observer（ESO） is calculated. External disturbance and internal system disturbance are regarded as a total disturbance. In addition, corresponding dynamic nonlinear compensation is given. Finally, double-rectifier model with control components is constructed in Matlab/Simulink. Through comparing and analyzing two control strategies, it is concluded that ADRC controller has excellent robustness. In order to further verify ADRC control effect, rectifier simulation models adopting ADRC controller are applied to traction network system chain model. ADRC controller has not only good inhibition effect on low frequency overvoltage oscillation of traction network, but also strong robustness and insensitivity to parameters.
出处
《电网技术》
EI
CSCD
北大核心
2016年第1期207-213,共7页
Power System Technology
基金
国家自然科学基金高铁联合基金重点项目(U1434203
U1134205)
国家自然科学基金(51377136)~~
