Development of Zigzag Transformer for Unbalance Compensation in Railway Power System

Park, Jong-young; Jung, Hosung; Han, Moonseob; Lee, Hanmin; Kim, Hyungchul

doi:10.5370/kiee.2022.71.10.1474

Cited by 1 publication

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“…Harmonic distortion can disrupt the performance of electrical machines, therefore research [13] carried out the installation of zigzag transformers to improve the performance of induction electric machines. Installation of zigzag transformers has also been carried out in railway electrical power systems [14]. The aim is to balance the load on the train's electric power system as well as improve power quality.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the usage of zigzag transformers to reduce harmonics distortion in distribution systems

Gumilar,

Wicaksono,

Afandi

et al. 2023

J. Mechatron. Electr. Power Veh. Technol.

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The increasing use of power electronics in various sectors leads to harmonic distortion in electric power systems, affecting power quality and equipment longevity. While harmonic filters have been used to address this issue, they are limited in effectiveness, particularly in reducing distortion across the entire distribution system. This study aims to reduce harmonic distortion using a zigzag transformer as a more comprehensive solution in mitigating harmonic distortion throughout the entire distribution system. In this research, the zigzag transformer was placed at point common coupling to reduce harmonic distortion in the distribution system as a whole. A zigzag transformer connection was configured by connecting either three windings of a single-phase transformer or one winding of a three-phase transformer. Based on the results of this research, the total harmonic distortion (THD) value has decreased from 25.26 % to 2.48 % following the implementation of the zigzag transformer. This substantial decrease in THD concludes the zigzag transformer's effectiveness as a solution for improving power quality in electrical distribution systems.

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Section: Introductionmentioning

confidence: 99%