Journal of the Korean Society for Railway (한국철도학회논문집)
- Volume 2 Issue 2
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- Pages.39-45
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- 1999
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- 1738-6225(pISSN)
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- 2288-2235(eISSN)
Power Conversion Unit for Propulsion System of the High Speed Train
고속전철 추진시스템의 전력변환장치
Abstract
This paper presents the current-fed inverter of a TGV-K traction system with thyristor switches using phase control and commutation techniques. The current-fed inverters have two modes of operation which consist of forced commutation and natural commutation. In forced commutation mode, at speed of less than 120km/h, commutation is forced by means of the commutation capacitors and the thyristors. Above 120km/h, the thyristors operate in natural commutation mode. according to the voltages between phases of the motors. In this paper. the power conversion theory of the TGV-K traction system and the control principle of the converter and current-fed inverter are discussed.