电气化铁路低频振荡研究综述

Review of Low-Frequency Oscillation in Electric Railways

电气化铁路牵引供电系统中的低频振荡现象是随着我国新型交直交传动动车组与电力机车的大量投运而产生的新问题。参考国内外文献总结定义了两种类型的牵引网低频振荡,分别阐述了其特征。根据对国内低频振荡案例现场测试数据的分析,介绍了一种基于单相dq分解的检测手段。归纳了现有的对低频振荡的3种分析方法:时域仿真法、特征值法、频域分析法,比较了各自的优缺点。鉴于该现象是车网系统的匹配问题,从车与网两个角度总结了其抑制方法,并展望了今后的研究方向。

Recently,there are several reports on the low-frequency oscillation phenomena in the traction power supply systems of Chinese electric railways. It＇s a new issue after more and more AC-DC-AC drive Electric Multiple Units（ EMUs） and locomotives have been put into service. According to the related domestic and foreign literatures,the low-frequency oscillation phenomena in the traction power supply system are classified into two types,whose main features are described respectively. After analyzing the on-site measured data of domestic lowfrequency oscillation cases,a detection method based on the single-phase dq decomposition is introduced. The analysis methods for this phenomenon are summarized into 3 types,i. e. the time-domain simulation,the eigenvalue analysis,and the frequency-domain analysis. And then,the pros and cons of these methods are discussed. As the low-frequency oscillation is caused by the interaction of the vehicle and the grid,the oscillation damping methods on both sides are concluded respectively. The directions for future researches are set forth in the final part.