A novel locomotive auxiliary converter control strategy with harmonic suppression for avoiding resonance voltage accidents in an electrified railway

Mu, Meijun; Yang, Zhongping; Lin, Fei; Liu, Shihui

doi:10.1002/tee.22973

Cited by 4 publications

(1 citation statement)

References 23 publications

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“…The abundant usage of rectifiers in the third rail systems can cause severe harmonic distortion [7]- [9]. Harmonic distortions give rise to many technical issues including degradation of transformers [10], [11] and electric motors [12], low power factor, malfunction of protective relays, increase of power losses, resonance [13], [14], and interference to communication devices [15]. For example, the use of 12-pulse rectifiers in the third rail system has generated a significant amount of 11 th and 13 th order harmonics, resulting in significant harmonic pollution to the rail system [16].…”

Section: Introductionmentioning

confidence: 99%

Mitigation of harmonic distortions in third rail electrical systems

Hoo

Chua²,

Lim³

et al. 2023

IJPEDS

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The extensive use of power electronic converters in the third rail system increases the harmonic distortions on the rail electrical feeding systems. Electrical machines and transformers could be overheated causing premature failures of the devices. It is therefore important to address the harmonic distortions on the electrical networks during real-time operation, which includes the degraded operation, not just the normal operation. In this paper, the harmonic distortions of a third rail system are investigated using electrical transient and analysis program (ETAP) simulation software. Four operating scenarios, namely the normal operation and three degraded operations, are considered in the studies. The degraded operations occur when one of the bulk supply transformers or 33 kV feeders is out of service. The findings of the studies showed that the 11th and 13th order harmonics are the dominant harmonic orders due to the use of 12-pulse rectifiers on the third rail system. Single-tuned harmonic filters are designed and placed in the 33 kV feeders to mitigate the individual voltage harmonic distortion (IHDv) and the total voltage harmonic distortion (THDv) so that it is within the statutory of IEEE 519:2014.

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Section: Introductionmentioning

confidence: 99%

Mitigation of harmonic distortions in third rail electrical systems

Hoo

Chua²,

Lim³

et al. 2023

IJPEDS

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Dynamic Harmonic Distortion Analysis and Mitigation Strategies for DC Third Rail Systems

Hoo,

Chua,

Lim

et al. 2024

Urban Rail Transit

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Harmonic distortions in DC third rail systems can cause overheating of electric motors and transformers. Single-tuned filters and shunt active harmonic filters (SAHFs) are often used to mitigate the harmonic distortions. However, there is a lack of studies on the effects of train dynamics on harmonic distortions. This paper aims to investigate the influence of dynamic train behaviors for a DC third rail system and provide recommendations for the design of single-tuned filters and SAHFs to mitigate the harmonic distortions. The traction power supply system of a DC third rail system in Malaysia is modeled using ETAP-eTraX and MATLAB-Simulink software for the investigation. The ETAP-eTraX software is used to accurately compute the dynamic behavior of the train, while MATLAB-Simulink allows for the assessment of the impact of train behavior on the rail track, as well as the harmonic effect of the railway power network on the train. The findings showed that the SAHF exhibits strong adaptability and superior filtering performance compared to the single-tuned filter in addressing dynamic harmonic distortion in traction power supply systems. This study emphasizes the significance of incorporating harmonic mitigation devices, particularly for managing dynamic harmonic distortion based on actual train consumption patterns.

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