电力机车运行工况对车网系统低频振荡的影响规律研究

doi:10.11985/2022.02.015

摘要/Abstract

摘要：

近年来,随着我国新型交直交传动动车组与电力机车的大量投运,电气化铁路中出现了低频振荡现象,对铁路系统造成了极大危害。目前,研究车网系统低频振荡时仅考虑整备机车的影响,然而在同一供电臂下,往往还存在正常大功率运行的机车。因此,通过建立整备机车(低功率运行状态)和运行机车不同工况(大功率运行状态和制动状态)的阻抗模型,分析了不同工况下机车阻抗特性的差异,并运用阻抗比判据分析了运行机车不同工况对车网系统低频振荡的影响规律。最后,在Matlab/Simulink中搭建了牵引网、整备机车和运行机车的仿真模型,仿真结果验证了理论分析的正确性。

关键词: 低频振荡, 车网系统, 运行机车, 阻抗比

Abstract:

In recent years, with the large number of new AC-DC transmission EMU and electric train put into operation in China, the phenomenon of low-frequency oscillation appeared in electrified railway, which has caused great harm to the railway system. At present, when studying the low-frequency oscillation of the vehicle-network system, only the influence of the prepared vehicle is considered. However, under the same power supply arm, there are usually running vehicle with high power. Therefore, the difference of the impedance characteristics of the vehicle under different power is analyzed by establishing the impedance model of the prepared vehicle(low power operation) and the high-power running vehicle, and the influence law of the high-power running vehicle on the low-frequency oscillation of the vehicle-network system is analyzed by using the impedance ratio criterion. Finally, the simulation model of traction network, prepared vehicle and the high-power running vehicle is built to verify the correctness of theoretical analysis.

Key words: Low-frequency oscillation, vehicle-network system, running vehicle, impedance ratio criterion

中图分类号:

TM561

孟昭斐, 胡海涛, 周毅. 电力机车运行工况对车网系统低频振荡的影响规律研究[J]. 电气工程学报, 2022, 17(2): 131-141.

MENG Zhaofei, HU Haitao, ZHOU Yi. Study on the Influence Law of Electric Vehicle on Low Frequency Oscillation of Vehicle-network System under Operating Condition[J]. Journal of Electrical Engineering, 2022, 17(2): 131-141.

图/表 27

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表2

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参考文献 19

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序号	车型	f₁/Hz	测试时间	测试地点
1	HXD₁	3~4	2008年1月	湖东机务段
2	CRH1	5	2010年1月	上海南翔动车所
3	CRH5	5	2010年9月	青岛动车所
4	HXD₂B	6~7	2011年11月	山海关铁路枢纽
5	HXD₂B	2	2014年1月	徐州北铁路枢纽

参数	数值
交流侧输入电压u_s/V	1 770
直流侧电压u_dc/V	3 600
负载电阻R_L/Ω	1 000
输入电感L/mH	5
直流侧电容C_d/mF	9
电流环P参数K_pi	1.62
电流环I参数K_ii	4.85
电压环P参数K_pv	0.5
电压环I参数K_iv	6.81
锁相环P参数K_pPLL	0.015
锁相环I控制参数K_iPLL	0.083