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모듈러 멀티레벨 컨버터 기반 양방향 무중단 철도 급전시스템의 운행 및 에너지 편익 분석 Operational and Energy Benefit Analysis of a Modular Multilevel Converter-Based Bidirectional Continuous Railway Feeding System

논문 기본 정보

저자정보
(Korea National Railway) (Korea National Railway) (Korea National Railway) (Korea National Railway)
저널정보
대한전기학회 전기학회논문지 전기학회논문지 제75권 제11호
발행연도
수록면
3,040 - 3,045 (6page)
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모듈러 멀티레벨 컨버터 기반 양방향 무중단 철도 급전시스템의 운행 및 에너지 편익 분석
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    초록·키워드

    Neutral sections in 25 kV AC railways require trains to coast with the main circuit breaker open, which temporarily interrupts traction. Regenerative-energy use also varies with the power-receptive capacity of the feeding section and the upstream grid. The operational and energy effects of a bidirectional continuous feeding system based on a modular multilevel converter (MMC) were quantified using a one-dimensional train-motion model and an energy-balance calculation. A 300 km/h train was evaluated for effective de-energized lengths of 200–800 m and gradients of 0–15‰. At 400 m, speed loss increased from 1.28 km/h on level track to 3.23 km/h at 12‰ and reached 7.50 km/h at 800 m and 15‰. The calculated delay to initial-speed recovery remained below 0.4 s. When regenerative receptivity increased from 0.32 to 0.88, the reduction in normalized net supply energy ranged from 5.8% to 18.6% as the recoverable braking-energy ratio varied from 0.10 to 0.30. The reduction was 12.0% at a ratio of 0.20. Field validation requires synchronized measurements of train operation and feeder power to replace the assumed vehicle parameters and receptivities.

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