• 대한전기학회논문지:전력기술부문A
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• 제52권12호
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• pp.684-690
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• 2003

This paper estimates line constants of equivalent five-conductors model using the reduced equivalent method. Actually, the catenary system is considered by the equivalent five-conductors model in the electrical aspect. Therefore, we should compose the catenary system of the equivalent five-conductors model, then the line constants of this equivalent five-conductors model are calculated. This paper shows the reducing process about the real system of the field by using the proposed theory. Also the line constants of reduced system are provided in this paper.

• International Journal of Railway
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• 제3권2호
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• pp.46-53
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• 2010

Electric railroad systems consist of rolling stock, track, signal and catenary system. In the catenary system, one of the most important factors is the impedance according to the design and characteristic. Before the catenary system is designed, the impedance should be precedently researched. The railroad catenary system is complex system which is composed by five conductors. The five conductors classify up and down feeders, up and down contact wire group, rail group. Therefore, we should compose the catenary system of the equivalent five-conductors model. In this paper, we suggest a geometrical model and a equivalent conductor model by using geometric mean radius of five conductors in the catenary system. Also, we calculate demanded parameter values in the model. By using those, line constants of five conductors are analyzed by applying the equivalent method called as the condensed joint matrix.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.443-445
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• 2001

This paper describes an estimate of line constants using the five-conductors equivalent model. Actually, a catenary system is composed of the five-conductors equivalent model. Therefore, we made up the five conductors equivalent model of a catenary system by applying a method of inverse matrix. Finally, we estimated line constants using the five-conductors equivalent model. To verify the results, we compared estimated line constants with measured those.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2003년도 춘계학술대회 논문집
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• pp.415-420
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• 2003

This paper estimates line constants of equivalent five-conductors model by using the reduced equivalent method. Actually, the catenary system is considered by the equivalent five-conductors model in the electrical aspect. Therefore, we should compose the catenary system of the equivalent five-conductors model. And then we calculate line constants of this equivalent five-conductors model. This paper shows the reducing process about the real system of the field by using the proposed theory and also line constants of reduced system

• 대한전기학회논문지:전력기술부문A
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• 제53권8호
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• pp.421-431
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• 2004

Line constants are composed by impedances and susceptances. A paper which was published estimated only impedances of line constants. Therefore, this paper estimates susceptances as well as impedances of equivalent five-conductors model using the reduced equivalent method. In order to verify estimated line constants, we measured line constants of real railway system. And we compared calculated results with measured data on 60Hz∼3000Hz. For the other verification, the calculation results from the proposed model and the measurement data from the test are compared focused on the amplification of harmonic current in the paper.