Voltage fluctuation characteristics of traction power supply system considering AC-DC-AC electric locomotives accessed

被引：0
|
作者：
Zhang G. [1 ]
Liu Z. [1 ]
Xiang C. [1 ]
Yao S. [1 ]
机构：
[1] School of Electrical Engineering, Southwest Jiaotong University, Chengdu
来源：
| 2018年 / Electric Power Automation Equipment Press卷 / 38期
基金：
中国国家自然科学基金;
关键词：
AC-DC-AC electric locomotive; DFT; Modal analysis; Signal reconstruction; Symmetrical frequency; TLS-ESPRIT algorithm; Voltage fluctuation;
D O I：
10.16081/j.issn.1006-6047.2018.01.018
中图分类号：
学科分类号：
摘要：
Aiming at the phenomenon of voltage instability and locomotive blockade in traction power supply system considering the AC-DC-AC electric locomotives accessed, it is proved that this phenomenon originates from a power quality problem in theory instead of a low frequency oscillation. The modulation theory is employed to analyze the mechanism of the symmetrical frequency component as a result of the low frequency signal transmitting in the rectifier. The voltage instability characteristics are analyzed by means of DFT(Discrete Fourier Transform), and the dominant modes are identified by the TLS-ESPRIT(Total Least Square-Estimation of Signal Parameters via Rotational Invariance Techniques) algorithm. On this basis, this phenomenon is defined as a voltage fluctuation problem. The signal is reconstructed by the mathematical expression of voltage fluctuation, and the effectiveness of the proposed methodology is further verified by analyzing the performance evaluation index of the reconstructed signal. © 2018, Electric Power Automation Equipment Press. All right reserved.
引用
收藏
页码：121 / 128and136
相关论文
共 26 条
  • [1] Wang H., Wu M., Sun J., Analysis of low-frequency oscillation in electric railways based on small-signal modeling of vehiclegrid system in dq frame, IEEE Transactions on Power Electronics, 30, 9, pp. 5318-5330, (2015)
  • [2] Danielsen S., Fosso O.B., Molinas M., Et al., Simplified models of a single-phase power electronic inverter for railway power system stability analysis-development and evaluation, Electric Power Systems Research, 80, 2, pp. 204-214, (2010)
  • [3] Menth S.M., Meyer M., Low frequency power oscillations in electric railway systems, Eb-Elektrische Bahnen, 104, 5, pp. 216-221, (2006)
  • [4] Wang H., Wu M., Simulation analysis on low-frequency oscillation in traction power supply system and its suppression method, Power System Technology, 39, 4, pp. 1088-1095, (2015)
  • [5] Heising C., Oettmeier M., Staudt V., Et al., Improvement of low-frequency railway power system stability using an advanced multivariable control concept, The 35th Annual Conference of IEEE Industrial Electronics, pp. 560-565, (2009)
  • [6] Zhang G., Liu Z., Yao S., Et al., Suppression of low frequency oscillation in traction network of high-speed railway based on auto disturbance rejection control, IEEE Transactions on Transportation Electrification, 2, 2, pp. 244-255, (2016)
  • [7] Zhang G., Liu Z., Xiang C., Et al., Mechanism on voltage low frequency oscillation of high-speed railway traction network and EMU coupling system, Power System Technology, 39, 7, pp. 1956-1962, (2015)
  • [8] Paice A.D.B., Meyer M., Rail network modelling and stability: the input admittance criterion, The 14th International Symposium Mathematics Theory Network System, pp. 1-6, (2000)
  • [9] Liu Z., Zhang G., Liao Y., Stability research of high-speed railway EMUs and traction network cascade system considering impedance matching, IEEE Transactions on Industry Applications, 52, 5, pp. 4315-4326, (2016)
  • [10] Demello F.P., Concepts of synchronous machine stability as affected by excitation control, IEEE Transactions on Power Apparatus and System, 88, 4, pp. 316-329, (1969)
123