基于滑模结构无源控制的车网耦合系统低频振荡抑制方法

doi:10.19595/j.cnki.1000-6753.tces.190099

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摘要

近年来国内多地出现高速铁路牵引网低频振荡,情况严重时导致动车组发生牵引封锁。该文以CRH5型动车组为算例,提出一种基于滑模结构电流无源控制的动车组PWM整流器双闭环控制策略抑制低频振荡。首先,建立车网耦合系统回比矩阵模型,利用G-sum范数判据分析了低频振荡的产生机理,得到车网耦合系统发生低频振荡的临界条件。然后,根据低频振荡发生时的工况,推导动车组整流器dq轴状态空间模型,设计基于外环电压滑模结构无源控制的内环电流控制器。与几种传统算法的稳定性分析及仿真结果对比表明,提出的算法具有更好的稳态和动态特性,有效地抑制了牵引网低频振荡现象。

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	王迎晨
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关键词 ：低频振荡, 车网耦合系统, 稳定性分析, PWM整流器, 滑模结构, 无源控制

Abstract：

In recent years, there have been a number of low-frequency oscillations (LFO) of electric multiple units and traction network coupling system (EMUs-TNCS) in high-speed railways, leading to traction blockade of the EMUs. Taking the CRH5 EMUs as an example, this paper presents a double closed-loop control strategy for EMUs PWM rectifiers based on current passivity-based control of sliding mode structure (CPBC-SMS) to suppress the LFO. Firstly, a return-ratio matrix model of the EMUs-TNCS is established, and the generation mechanism of the LFO is analyzed by using the G-sum norm criterion, obtaining the critical condition of the LFO. Then, according to operating conditions of the LFO, the state space model of each EMUs rectifier is derived in dq-frame. Subsequently, the internal loop current controller based on CPBC-SMS is designed. Stability analysis and simulation results validate that the proposed control provides effective capability of the LFO suppression with better steady-state and dynamic performance compared to several conventional methods.

Key words： Low-frequency oscillation electric multiple units (EMUs) and traction network coupling system stability analysis PWM rectifier sliding mode structure passivity-based control

收稿日期: 2019-01-25 出版日期: 2020-02-12

PACS:

TM712

基金资助:

中央高校基本科研业务费专项资金（2018JBZ101）、国家重点研发计划先进轨道交通重点专项资金（2017YFB1200802）和博士后创新人才支持计划（BX201700026）资助项目

通讯作者: 杨少兵男,1972年生,副教授,博士生导师,研究方向为电力系统信息化与大数据分析、铁道电气化、负荷建模技术等。E-mail：shbyang@bjtu.edu.cn

作者简介: 王迎晨男,1994年生,硕士研究生,研究方向为电气化铁路高次谐波分析、车网耦合系统稳定性。E-mail：wychpower@163.com

引用本文:

王迎晨, 杨少兵, 宋可荐, 吴命利. 基于滑模结构无源控制的车网耦合系统低频振荡抑制方法[J]. 电工技术学报, 2020, 35(3): 553-563. Wang Yingchen, Yang Shaobing, Song Kejian, Wu Mingli. An Approach Based on SMS to Suppress Low-Frequency Oscillation in the EMUs and Traction Network Coupling System Using PBC. Transactions of China Electrotechnical Society, 2020, 35(3): 553-563.

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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.190099 https://dgjsxb.ces-transaction.com/CN/Y2020/V35/I3/553

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