Application on of SFCL in Automatic Power Changeover Switch System of Electric Railways

Shin, Hee-Sang; Cho, Sung Min; Huh, Jae-Sun; Kim, Jae-Chul; Kweon, Dong-Jin

doi:10.1109/tasc.2011.2177617

Cited by 14 publications

(10 citation statements)

References 2 publications

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“…• When the HST main breaker is not open in the NS and the train continues feeding, an arc flash in the catenary is produced, and in some case can be broken [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…• Every 35 km, the HST crosses a neutral section and its main breaker is operated with one connection and one disconnect. The main breaker operates approximately 10,000 times/year, the mechanical lifetime is reduced, and the maintenance operation costs are increased [6].…”

mentioning

confidence: 99%

“…These high values of current cause high mechanical efforts by the transformer conductors, accelerating the aging of the transformer and main breaker. Occasionally, it can activate the main breaker current protection and the train is stopped [6,10,11].…”

mentioning

confidence: 99%

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Medium-Voltage AC Static Switch Solution to Feed Neutral Section in a High-Speed Railway System

et al. 2018

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A high-speed train (HST) is a single-phase load supplied by a three-phase AC grid. The HST produces unbalanced three-line currents affecting the power quality of the grid. To balance the asymmetries on average, railway feeding sections are supplied that rotate the three phases of the grid. An electric isolation segment, called the neutral section (NS), between different sections is necessary. The HST must pass through this 1.6 km NS without power supply. In this paper, a medium-voltage AC static switch solution to feed the high-speed train in the NS is proposed. Thyristor technology is selected to design the 25 KVAC static switch. A medium-voltage power electronics procedure design is proposed to ensure proper operation in the final application. An NS operation is analyzed to identify impacts within the electric system and solution requirements are developed. Then, a low-scale prototype is used to experimentally validate the solution based on thyristor technology and the medium-voltage AC static switch is designed. Limitations on power and voltage at the Mondragon University Medium-Voltage Laboratory do not allow testing of the AC static switch at nominal conditions. A partial test procedure to test sections of the AC static switch is proposed and applied to validate the solution. Finally, experimental results for the Cordoba–Malaga (Spain) high-speed railway in real conditions with an HST crossing the NS at 300 km/h are shown.

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“…• When the HST main breaker is not open in the NS and the train continues feeding, an arc flash in the catenary is produced, and in some case can be broken [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Medium-Voltage AC Static Switch Solution to Feed Neutral Section in a High-Speed Railway System

et al. 2018

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“…Since the voltage drop occurring on the line and the currents drawn do not reach high values under normal operating conditions, the distances between the supply stations may be longer. As the number of traction supply stations and the efficiency of the traction force system increase, the voltage drop on the line and the losses decrease [12][13][14][15][16]. The traction system of the railway vehicle consists of a transformer, a three-phase PWM inverter and an asynchronous engine.…”

Section: Introductionmentioning

confidence: 99%

“…ANFIS structure by equation(12), xobs are the real values, xmodel are the predicted values, n is the measurement number[35][36] (12). …”

mentioning

confidence: 99%

Comparison of ANN and ANFIS Methods for the Voltage-Drop Prediction on an Electric Railway Line

Kocaarslan¹,

Akçay²,

Akgündoğdu³

et al. 2018

IU-JEEE

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Railway electrification systems are designed with regard to the operating data and design parameters. The minimum voltage rating required by traction during the operation should be provided. The maximum voltage drop on a line determines the minimum traction voltage. This voltage should be maintened within certain limits for the continuity of operation. In this study, the maximum voltage drop generated via traction was determined using artificial neural network (ANN) and adaptive neuro-fuzzy inference system (ANFIS) for a 25-kV AC-supplied railway. The voltage drop on line was calculated with regard to the operating data using ANN and ANFIS. ANN and ANFIS were explained, and the results were compared. The Levenberg-Marquardt (LM) algorithm was used for the ANN model. The LM algorithm is preferred because of the speed and stability it provides for the training of ANNs. The data created for one-way supply status were examined for simulation.

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Bidirectional impedance-type transformer inrush current limiter

Tseng

Chen

2013

Electric Power Systems Research

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Application on of SFCL in Automatic Power Changeover Switch System of Electric Railways

Cited by 14 publications

References 2 publications

Medium-Voltage AC Static Switch Solution to Feed Neutral Section in a High-Speed Railway System

Medium-Voltage AC Static Switch Solution to Feed Neutral Section in a High-Speed Railway System

Comparison of ANN and ANFIS Methods for the Voltage-Drop Prediction on an Electric Railway Line

Bidirectional impedance-type transformer inrush current limiter

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