Optimization and parameter design for suppression strategy of low-frequency oscillation in the vehicle-network coupling system

LI Xiangchao; NIU Ke

doi:10.13890/j.issn.1000-128X.2022.05.019

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Optimization and parameter design for suppression strategy of low-frequency oscillation in the vehicle-network coupling system

Railway Electrification | 更新时间：2024-08-02

- Optimization and parameter design for suppression strategy of low-frequency oscillation in the vehicle-network coupling system
- Electric drive for locomotives Issue 5, Pages: 129-134(2022)
- 作者机构：
  
  郑州铁路职业技术学院机车车辆学院，河南郑州　　450000
- 作者简介：
- 基金信息：
- DOI：10.13890/j.issn.1000-128X.2022.05.019
  CLC： U223.5⁺2
- Published：10 September 2022，
  
  Received：23 June 2021，
  
  Revised：26 August 2022，
- 稿件说明：
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LI Xiangchao, NIU Ke. Optimization and parameter design for suppression strategy of low-frequency oscillation in the vehicle-network coupling system. [J]. Electric drive for locomotives (5):129-134(2022)
DOI：

LI Xiangchao, NIU Ke. Optimization and parameter design for suppression strategy of low-frequency oscillation in the vehicle-network coupling system. [J]. Electric drive for locomotives (5):129-134(2022) DOI： 10.13890/j.issn.1000-128X.2022.05.019.

摘要

在电气化铁路中，当电力机车与牵引网的电气参数失配时易诱发低频振荡现象，不仅影响牵引网电压的供电保护，而且会引起机车牵引系统的封锁，对牵引网和机车的安全运行构成极大威胁。为更好地抑制该振荡现象，文章提出一种优化的振荡抑制策略及其参数设计方法。首先介绍电力机车-牵引网系统的等效电路拓扑和控制策略，并利用小信号理论建立车网系统的闭环小信号模型；然后在系统稳定性分析的基础上，以提高抑制策略的动态性能为目的，提出一种优化的基于主动阻尼控制的振荡抑制方法，并针对主动阻尼控制系数过大会影响系统稳态性能的问题，通过劳斯稳定判据确定主动阻尼控制系数的最小值。最后，搭建时域仿真模型进行测试，其结果验证了所提优化方法的有效性及其参数设计的合理性。

Abstract

In electrified railway operation

it is easy to result in low-frequency oscillation if the electrical parameters of the locomotive and the traction network are mismatched. This will not only hamper the power supply protection of the traction network

but also lead to blocking of the locomotive’s traction system

posing severe threats to the safe operation of traction network and locomotive. To better suppress the oscillation

this paper presented an optimized oscillation suppression strategy and parameter design method. Firstly

after describing the equivalent circuit topology and control strategy of the vehicle-network system

a closed-loop small signal model of the system was modeled according to small signal theory. Then

on the basis of stability analysis

an optimized oscillation suppression method was proposed based on active damping control

aiming to improve the dynamic performance of the suppression strategy. As for the issue that excessively large coefficient for active damping control would influence the steady-state performance of the system

the minimum value of active damping control coefficient was determined according to Routh stability criterion. At last

the results of the test on time-domain simulation model verified the effectiveness of the optimized suppression method and the rationality of its parameter design.

关键词

低频振荡车-网系统主动阻尼抑制策略优化参数设计

Keywords

low-frequency oscillationvehicle-network systemactive dampingsuppression strategy optimizationparameter design

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