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

  • 제29권2호
  • /
  • Pages.54-61
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  • 2015
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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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PR 제어기를 이용한 3상 4선식 인버터 Neutral Leg 제어 방법

Control of the Neutral Leg in Three-Phase Four-Wire Inverter Using Proportional-Resonant Controller

  • Han, Jungho (Dept. of Railway Electrical and Signaling Engineering, Seoul National University of Science and Technology) ;
  • Song, Joongho (Dept. of Electrical and Information Engineering, Seoul National University of Science and Technology)
  • 투고 : 2014.10.21
  • 심사 : 2014.12.17
  • 발행 : 2015.02.28
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초록

In 3-phase 4-wire inverter, the unbalanced loads cause to increase the neutral current which brings the voltage deviation between the split dc-link capacitors to be larger. In order to solve this problem, a neutral leg is provided additively to the ordinary inverter circuit and the associated control methods are devised. This paper proposes a new neutral-leg controller based on a PR controller and shows relatively good performance even under unbalanced linear loads and nonlinear loads. The proposed control strategy illustrates its effectiveness under the various operating conditions through simulation works.

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참고문헌

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