Power Electronic Autotransformer Based 3×25 kV Network for Power Quality Enhancement In Railway Supply Systems

Tabish Mir; Pietro Tricoli

doi:10.1109/TTE.2023.3319591

Power Electronic Autotransformer Based 3×25 kV Network for Power Quality Enhancement In Railway Supply Systems

Tabish Mir, Pietro Tricoli

Electronic, Electrical and Systems Engineering

Research output: Contribution to journal › Article › peer-review

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Abstract

State of the art single-phase AC traction systems are based on a split-phase 2×25kV supply network with multiple regularly spaced auto-transformers. The main drawbacks of this arrangement are the unbalanced currents in the three-phase grid and reactive power flow due to transformers and auto-transformers. This paper proposes to solve these issues with a completely new 3×25 kV railway power supply supported by a power electronic autotransformer (PEAT). The PEAT circuit comprises of single-phase back-to-back voltage source converters, connected across different phase pairs of the three-phase network. These voltage-source converters balance the three-phase grid current for all traction load conditions, ensuring grid compliant power quality performance. Over and above that, the PEAT system enables reactive power control and ensure unity power factor at the point of connection. Besides detailing the control algorithm for the PEAT system, this paper also discusses various design aspects and optimal positioning of the PEAT unit along the railway line. The efficacy of the PEAT topology is illustrated through extensive simulations carried out in Matlab/Simulink environment. These are further validated via real time hardware-in-the-loop (HIL) results obtained from a Typhoon HIL 404 device together with a C2000 microcontroller based interface card.

Original language	English
Journal	IEEE Transactions on Transportation Electrification
Early online date	27 Sept 2023
DOIs	https://doi.org/10.1109/TTE.2023.3319591
Publication status	E-pub ahead of print - 27 Sept 2023

Keywords

AC railway systems
power quality
power electronic autotransformer
railway electrification
grid current balancing
hardware-in-the-loop (HIL) systems

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10.1109/TTE.2023.3319591

MirT2023Power
T. N. Mir and P. Tricoli, "Power Electronic Autotransformer Based 3×25 kV Network for Power Quality Enhancement In Railway Supply Systems," in IEEE Transactions on Transportation Electrification, doi: 10.1109/TTE.2023.3319591. © 2023 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Accepted author manuscript, 669 KBLicence: Other (please specify with Rights Statement)

Cite this

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title = "Power Electronic Autotransformer Based 3×25 kV Network for Power Quality Enhancement In Railway Supply Systems",

abstract = "State of the art single-phase AC traction systems are based on a split-phase 2×25kV supply network with multiple regularly spaced auto-transformers. The main drawbacks of this arrangement are the unbalanced currents in the three-phase grid and reactive power flow due to transformers and auto-transformers. This paper proposes to solve these issues with a completely new 3×25 kV railway power supply supported by a power electronic autotransformer (PEAT). The PEAT circuit comprises of single-phase back-to-back voltage source converters, connected across different phase pairs of the three-phase network. These voltage-source converters balance the three-phase grid current for all traction load conditions, ensuring grid compliant power quality performance. Over and above that, the PEAT system enables reactive power control and ensure unity power factor at the point of connection. Besides detailing the control algorithm for the PEAT system, this paper also discusses various design aspects and optimal positioning of the PEAT unit along the railway line. The efficacy of the PEAT topology is illustrated through extensive simulations carried out in Matlab/Simulink environment. These are further validated via real time hardware-in-the-loop (HIL) results obtained from a Typhoon HIL 404 device together with a C2000 microcontroller based interface card.",

keywords = "AC railway systems, power quality, power electronic autotransformer, railway electrification, grid current balancing, hardware-in-the-loop (HIL) systems",

author = "Tabish Mir and Pietro Tricoli",

year = "2023",

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day = "27",

doi = "10.1109/TTE.2023.3319591",

language = "English",

journal = "IEEE Transactions on Transportation Electrification",

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AU - Mir, Tabish

AU - Tricoli, Pietro

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Y1 - 2023/9/27

N2 - State of the art single-phase AC traction systems are based on a split-phase 2×25kV supply network with multiple regularly spaced auto-transformers. The main drawbacks of this arrangement are the unbalanced currents in the three-phase grid and reactive power flow due to transformers and auto-transformers. This paper proposes to solve these issues with a completely new 3×25 kV railway power supply supported by a power electronic autotransformer (PEAT). The PEAT circuit comprises of single-phase back-to-back voltage source converters, connected across different phase pairs of the three-phase network. These voltage-source converters balance the three-phase grid current for all traction load conditions, ensuring grid compliant power quality performance. Over and above that, the PEAT system enables reactive power control and ensure unity power factor at the point of connection. Besides detailing the control algorithm for the PEAT system, this paper also discusses various design aspects and optimal positioning of the PEAT unit along the railway line. The efficacy of the PEAT topology is illustrated through extensive simulations carried out in Matlab/Simulink environment. These are further validated via real time hardware-in-the-loop (HIL) results obtained from a Typhoon HIL 404 device together with a C2000 microcontroller based interface card.

AB - State of the art single-phase AC traction systems are based on a split-phase 2×25kV supply network with multiple regularly spaced auto-transformers. The main drawbacks of this arrangement are the unbalanced currents in the three-phase grid and reactive power flow due to transformers and auto-transformers. This paper proposes to solve these issues with a completely new 3×25 kV railway power supply supported by a power electronic autotransformer (PEAT). The PEAT circuit comprises of single-phase back-to-back voltage source converters, connected across different phase pairs of the three-phase network. These voltage-source converters balance the three-phase grid current for all traction load conditions, ensuring grid compliant power quality performance. Over and above that, the PEAT system enables reactive power control and ensure unity power factor at the point of connection. Besides detailing the control algorithm for the PEAT system, this paper also discusses various design aspects and optimal positioning of the PEAT unit along the railway line. The efficacy of the PEAT topology is illustrated through extensive simulations carried out in Matlab/Simulink environment. These are further validated via real time hardware-in-the-loop (HIL) results obtained from a Typhoon HIL 404 device together with a C2000 microcontroller based interface card.

KW - AC railway systems

KW - power quality

KW - power electronic autotransformer

KW - railway electrification

KW - grid current balancing

KW - hardware-in-the-loop (HIL) systems

U2 - 10.1109/TTE.2023.3319591

DO - 10.1109/TTE.2023.3319591

M3 - Article

SN - 2372-2088

JO - IEEE Transactions on Transportation Electrification

JF - IEEE Transactions on Transportation Electrification

ER -

Power Electronic Autotransformer Based 3×25 kV Network for Power Quality Enhancement In Railway Supply Systems

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