Power quality improvement of AC railway traction using railway static power conditioner a comparative study

Joseph, Vineetha P; Thomas, Jince

doi:10.1109/epscicon.2014.6887509

Cited by 10 publications

(12 citation statements)

References 13 publications

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“…To reduce the PFC capacity while meeting the NS standard, assume that the three-phase unbalance factor of the system is u θ . Substitute (4) into (8), and the power through the TT and PFC can be deduced as:…”

Section: Working Pattern Of the System 321 Regenerative Braking Patmentioning

confidence: 99%

“…As a result, a large negative sequence (NS) current will be injected into the threephase system, arouses severe challenges for the economy and reliability of TPSS. [4][5][6]. In addition, in a conventional TPSS, the existence of a neutral section will lead to velocity and traction power losses of the locomotive, which will cause a series of problems, such as overvoltage and overcurrent problems, affecting the normal operation of the locomotive [7,8].…”

Section: Introductionmentioning

confidence: 99%

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Energy storage traction power supply system and control strategy for an electrified railway

Chen

Cheng

et al. 2020

IET Generation, Transmission & Distribution

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Section: Working Pattern Of the System 321 Regenerative Braking Patmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Energy storage traction power supply system and control strategy for an electrified railway

Chen

Cheng

et al. 2020

IET Generation, Transmission & Distribution

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“…One of the main objectives of SRPC control system is to calculate the final compensation currents references of irx * , iry * [13]. From the Fig.…”

Section: A Compensation Currents Reference Signals Generationmentioning

confidence: 99%

Simplified rail power conditioner based on a half-bridge indirect AC/DC/AC Modular Multilevel Converter and a V/V power transformer

Tanta

Monteiro

Exposto

et al. 2017

IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society

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This paper presents a comprehensive study about a Simplified Rail Power Conditioner (SRPC) based on a half-bridge indirect AC/DC/AC Modular Multilevel Converter (MMC) and a V/V traction power transformer. The proposed system with a half-bridge MMC can decrease the costs, reduce the control complexity, and require less hardware devices in comparison with the rail power conditioner based on a full-bridge indirect AC/DC/AC MMC. Moreover, the SRPC with a half-bridge MMC is able to compensate current harmonics, reactive power, and the Negative Sequence Components (NSCs) of currents, which are caused by the unbalance loads between power grid phases. This paper explains the system architecture and its control algorithms based on a pulse-width modulation and a proportional-integral controller, which is used to control the compensation currents. The simulation results of the SRPC show the submodule voltage balancing control and the DC-bus voltage control in order to verify its effectiveness. The compensation strategy based on the NSCs detection is described and evaluated through simulation results.

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“…The compensation angle θca, is changed such that the value of cos(θca) and sin(θca) is changed to hccos(θca_rated) and hssin(θca_rated)respectively. These variations can be represented by the ratio of compensation power to rated ones, as shown in (3). (4) A graph showing the variation of hs value with load power factor under different design rated PFLr is plotted in Fig.…”

Section: A Concept Of Compensation Range To Evaluate Compensation Camentioning

confidence: 99%

“…(4) A graph showing the variation of hs value with load power factor under different design rated PFLr is plotted in Fig. 5 according to (3). Notice that the Railway HPQC is usually designed based on rated value, and the rated load power factor is denoted as PFLr in the figure.…”

Section: A Concept Of Compensation Range To Evaluate Compensation Camentioning

confidence: 99%

Analysis in the Effect of Co-phase Traction Railway HPQC Coupled Impedance on Its Compensation Capability and Impedance-Mapping Design Technique Based on Required Compensation Capability for Reduction in Operation Voltage

Lao

Wong

Dai

et al. 2017

IEEE Trans. Power Electron.

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Railway hybrid power quality conditioner (HPQC) is one of the newly proposed devices for power quality compensation in co-phase high speed traction power supply for its benefit in reduction of operation voltage over conventional railway power quality conditioner (RPC). However, initial Railway HPQC design is developed based on minimum operation voltage at pre-defined fixed rated load. This may not be applicable in practical condition when load varies. In order to solve this problem, a Railway HPQC design with increased operation voltage has been investigated to enhance the compensation capability. Nevertheless, the compensation capability is even larger than that required during load variations such that the operation voltage is higher than it actually requires. A lower operation voltage can actually be used to provide required compensation capability when the coupled impedance is different from the designed rated one. In this paper, the effect of coupled impedance on the compensation capability in Co-phase Railway HPQC is being analyzed. An impedance-mapping design technique based on required compensation capability is then proposed based on the analysis. The proposed method is advantageous for lower operation voltage and smaller capacitance value. The effectiveness of impedance-mapping technique is verified via simulation and experimental results.Index Terms-Railway hybrid power quality conditioner, high-speed railway, power quality, co-phase traction power supply, impedance mapping Manuscript

show abstract

Power quality improvement of AC railway traction using railway static power conditioner a comparative study

Cited by 10 publications

References 13 publications

Energy storage traction power supply system and control strategy for an electrified railway

Energy storage traction power supply system and control strategy for an electrified railway

Simplified rail power conditioner based on a half-bridge indirect AC/DC/AC Modular Multilevel Converter and a V/V power transformer

Analysis in the Effect of Co-phase Traction Railway HPQC Coupled Impedance on Its Compensation Capability and Impedance-Mapping Design Technique Based on Required Compensation Capability for Reduction in Operation Voltage

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