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Volume 28 Issue 5
Oct.  2015
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Article Contents
Journal of Southwest Jiaotong University  > 2015  >  28(5): 961-969.
ZHAO Yuanzhe, LI Qunzhan, ZHOU Fulin, ZHU Peng. Permeability Characteristics of High-Order Harmonics of Traction Network for Three-Phase Power System[J]. Journal of Southwest Jiaotong University, 2015, 28(5): 961-969. doi: 10.3969/j.issn.0258-2724.2015.05.028
Citation: ZHAO Yuanzhe, LI Qunzhan, ZHOU Fulin, ZHU Peng. Permeability Characteristics of High-Order Harmonics of Traction Network for Three-Phase Power System[J]. Journal of Southwest Jiaotong University, 2015, 28(5): 961-969. doi: 10.3969/j.issn.0258-2724.2015.05.028
shu

Permeability Characteristics of High-Order Harmonics of Traction Network for Three-Phase Power System

doi: 10.3969/j.issn.0258-2724.2015.05.028
  • Received Date: 22 Jan 2015
  • Publish Date: 25 Oct 2015
    Abstract
  • In order to study the influences of the high order harmonics of traction network on three-phase power system, the harmonic model of impedance-matching balanced transformer was established to analyze the permeability characteristics of high-order harmonics for public grid high-voltage three-phase system, and the harmonic model of the inverse Scott transformer was established to analyze the permeability characteristics of high-order harmonics for the low-voltage three-phase system of traction substation. The traction substation with severe harmonic distortion was measured, and the harmonic measured data were analyzed and compared with those resulted from harmonic models of impedance-matching balanced transformer and inverse Scott transformer. A filtering scheme based on Y-type wave-trap high-pass filter was proposed which is applied to the low-voltage three-phase system of traction substation, and a set of filtering devices was developed. The results show that the high-order harmonics less penetrate into the high-voltage three-phase system, but significantly into the low voltage three-phase system of traction substation. After filtering, the harmonic distortion rate of a-phase voltage at traction substation is reduced from 12.25% to 1.94%, and the harmonic distortion rates of b-phase and c-phase are also significantly reduced. This indicates that the developed device can filter the high-order harmonics and effectively improve the power supply quality of the low-voltage three-phase system.

     

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