车网系统高频谐振特性分析

近年来,随着交—直—交型电力机车和动车组的大量上线运行,在提高铁路运输效率和质量的同时,也使得牵引供电系统中的谐波特性发生变化,即低次谐波大大减少的同时,也带来了丰富的高次谐波。虽然这些高次谐波含有率不高,但却大大增加了系统发生高频谐振的可能性。当系统发生高频谐振时,往往会形成较大的过电压,影响系统的安全和稳定运行。文章选取由交流传动电力机车和牵引供电系统组成的车网系统作为研究对象,建立了车网系统联合仿真模型,并基于仿真分析结果和线路实测数据,对车网系统高频谐振特性进行了分析研究。

Analysis of high-frequency resonance characteristics of locomotive-network system

In recent years, with the wide application of AC-DC-AC electric locomotive and electric multiple units, while the railway transport efficiency and quality have been greatly improved, the harmonic characteristics of traction power supply system have been changed. Low-order harmonics have been greatly reduced and an abundant high-order harmonics have been included. Although the content of these high-order harmonics is very low, the possibility of harmonic resonance in the system will greatly increase. When the harmonic resonance occurred in the system, over-voltage often produced, that would influence the system safety and stability operation. This paper takes locomotive-network system as the research object, builds the united model of AC drive electric locomotive and traction network. Based on the results of simulation and the measured data, this paper analyzes high-frequency resonance characteristics of locomotive-network system.