摘要
随着CRH系列动车组和和谐系列大功率电力机车的广泛应用,牵引供电系统出现了一系列新的问题,其中牵引供电系统低频网压波动是比较严重的问题。为考察其发生机理,本文建立符合牵引供电低频网压波动实际情况的车网互联系统阻抗模型,利用基于阻抗的系统稳定性分析方法,分析不同阻抗条件下车网互联系统的稳定性,发现机车数量不同时,系统阻抗发生变化,且随着机车数量的逐渐增多,车网互联系统稳定性逐渐降低。基于Matlab/Simulink建立车网互联系统的仿真模型,结合现场实测及仿真分析,验证理论分析的正确性。该研究结果对认识和改善牵引供电系统低频网压波动有一定的参考价值。
With the CRH series EMU and HXDseries electric locomotives are widely adopted,traction power supply system appear a series of new problems,in which the low-frequency voltage fluctuation of traction network is more serious problem.In order to investigate the mechanism of its occurrence,on the basis of existing new energy grid connected system stability analysis,vehicle-network interconnected system impedance model conforms to actual situation of the traction power supply low frequency voltage fluctuation was build in this paper.Based on this system impedance stability analysis method,the vehicle-network interconnected stability under the different conditions of impedance were studied.The study found that the number of different locomotives,the system impedance changes,and with the locomotive number gradually increased,system stability gradually reduce.The simulation of the vehicle-network interconnected system was built in Matlab/Simulink,binding site measurement and simulation analysis to verify the correctness of the theoretical analysis.The findings for the understanding and improvement of traction power supply system low frequency voltage fluctuation has some reference value.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2017年第12期23-31,共9页
Journal of the China Railway Society
基金
国家自然科学基金(51477145
U1234203)
关键词
牵引供电
低频网压波动
车网互联
阻抗分析法
对比验证
traction power supply
low frequency voltage fluctuation
vehicle-network interconnected
imped-ance analysis method
comparative validation
