Railway Static Power Conditioner Field Test

Uzuka, Tetsuo; Ikedo, Shouji

doi:10.2219/rtriqr.45.64

Cited by 16 publications

(2 citation statements)

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“…With the development of switching devices, the power quality problems caused by the nonlinear loads tend to be solved by the advanced power electronics technology. A railway static power conditioner (RPC) was proposed in [5], [6]. RPC was a pioneering innovation that excited many improvements in the traction power supply system later [7]- [18].…”

Section: Introductionmentioning

confidence: 99%

Hybrid Power Quality Compensation System for Electric Railway Supplied by the Hypotenuse of a Scott Transformer

et al. 2020

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To solve the three-phase unbalance and reactive power problems in the electric railway power supply system, this paper proposes a Scott transformer based hypotenuse hybrid traction power system (Scott-HHPS). Compared with other co-phase traction power supply systems, the Scott-HHPS could achieve the same compensation objective with smaller active compensation capacity. The paper analyzes the basic principle and makes a comparison between the Scott-HHPS and typical co-phase power supply system. The mathematical relationships among the load current, power factor and capacity demand in condition of power factor variation and regenerative braking are analyzed. In order to further reduce the compensation capacity of the Scott-HHPS, the partial compensation strategy in respect to the index of power factor and unbalance is proposed. Besides, an instantaneous current detection method based on the theorem of conservation of power is adopted to simplify the control algorithms. Simulations and experiments are both constructed and the results demonstrate that the Scott-HHPS can effectively improve the power quality in the electric railway power supply system.

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Section: Introductionmentioning

confidence: 99%

Hybrid Power Quality Compensation System for Electric Railway Supplied by the Hypotenuse of a Scott Transformer

et al. 2020

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“…A unified power flow controller (UPFC) has been studied to provide unified reactive power compensation and balance the power load [7]. A railway power conditioner, a dedicated UPFC for the railway system, has been installed in a Japanese railroad system [8][9]. The circulating power flow of the parallel-feeding traction power system can be controlled by the UPFC, but it consists of high-cost inverters, capacitors, and controllers that may limit broad application in a railway system.…”

Section: Introductionmentioning

confidence: 99%

A Phase-shifter for Regulating Circulating Power Flow in a Parallel-feeding AC Traction Power System

Choi¹

2014

Journal of Electrical Engineering and Technology

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-A parallel-feeding AC traction power system increases the power supply capacity and decreases voltage fluctuations, but the circulating power flow caused by the phase difference between the traction substations prevents the system from being widely used. A circuit analysis shows that the circulating power flow increases almost linearly as the phase difference increases, which adds extra load to the system and results in increased power dissipation and load unbalance. In this paper, we suggest a phase shifter for the parallel-feeding AC traction power system. The phase shifter regulates the phase difference and the circulating power flow by injecting quadrature voltage which can be obtained directly from the Scott-connection transformer in the traction substation. A case study involving the phase shifter applied to the traction power system of a Korean high-speed rail system shows that a three-level phase shifter can prevent circulating power flow while the phase difference between substations increases up to 12 degrees, mitigate the load unbalance, and reduce power dissipation.

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Advanced Co-phase Traction Power Supply Simulation Based on Multilevel Converter

Shu

Xie

Jing

2012

Advances in Intelligent and Soft Computing

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Railway Static Power Conditioner Field Test

Cited by 16 publications

References 0 publications

Hybrid Power Quality Compensation System for Electric Railway Supplied by the Hypotenuse of a Scott Transformer

Hybrid Power Quality Compensation System for Electric Railway Supplied by the Hypotenuse of a Scott Transformer

A Phase-shifter for Regulating Circulating Power Flow in a Parallel-feeding AC Traction Power System

Advanced Co-phase Traction Power Supply Simulation Based on Multilevel Converter

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