조명전기설비학회논문지 (Journal of the Korean Institute of Illuminating and Electrical Installation Engineers)

  • 제27권4호
  • /
  • Pages.8-15
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  • 2013
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  • 1229-4691(pISSN)
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  • 2287-5034(eISSN)
한국조명전기설비학회 (The Korean Institute of IIIuminating and Electrical Installation Engineers)
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단상 3-레벨 PWM 컨버터를 위한 중성점 전압 변동 보상 기법

DC-link Voltage Ripple Compensation Method for Single Phase 3-level PWM Converters

  • 투고 : 2012.12.15
  • 심사 : 2013.02.25
  • 발행 : 2013.04.30
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초록

This paper proposes a DC-link voltage variation compensation method for a 3-level single phase converter for high-speed trains. Since 3-level NPC(Neutral Point Clamped) type converters have the split DC-link causing the inherent problem of voltage fluctuations in the upper and lower capacitors, reducing the voltage difference between the top and bottom capacitors is required. In this paper, compensation time proportional to the voltage difference is added to PWM switching time to solve the voltage variation. The compensation time is obtained by a PI controller. Simulation results demonstrate the validity of the proposed method.

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참고문헌

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