Harmonic Impedance Measuring Apparatus for Traction Power Supply System Based on Cascaded H-bridge Converters

被引：0
|
作者：
Liu Q. [1 ]
Wu M. [1 ]
Zuo C. [1 ]
机构：
[1] School of Electrical Engineering, Beijing Jiaotong University, Beijing
来源：
Tiedao Xuebao/Journal of the China Railway Society | 2018年 / 40卷 / 05期
关键词：
Cascaded H-bridge; Harmonic impedance; Resonance; Traction power supply system;
D O I：
10.3969/j.issn.1001-8360.2018.05.008
中图分类号：
O24 [计算数学];
学科分类号：
070102 ;
摘要：
The resonance accident of traction power supply systems, caused by high frequency harmonic currents of electric locomotives, is a threat to the safe and reliable operation of electrified railways. It is important to study the impedance frequency characteristics of the traction power supply system. Based on the harmonic current injection method, a novel scheme for measuring the harmonic impedance of the traction power supply system was proposed. This system adopted the cascaded H-bridge converter as harmonic generator and had a hierarchical control structure. Harmonic currents in the frequency range between 100 Hz and 5 000 Hz can be injected into the traction power feeding network through a boosting transformer. By measuring and recording the voltage and current of the injection point, the harmonic impedance of the traction power supply system can be calculated. The simulation results indicate that the simple and well-controlled apparatus can measure the harmonic impedance accurately in the designed frequency range, without the need for a separate rectifier as the DC voltage source. © 2018, Department of Journal of the China Railway Society. All right reserved.
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页码：53 / 58
页数：5
相关论文
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