3-레벨 NPC 인버터의 소신호 모델링과 중성점 전압 진동 저감
- Title
- 3-레벨 NPC 인버터의 소신호 모델링과 중성점 전압 진동 저감
- Other Titles
- A Small Signal Modeling of Three-level Neutral-Point-Clamped Inverter and Neutral-Point Voltage Oscillation Reduction
- Author
- 현동석
- Keywords
- Grid connected inverter system; Small signal modeling; Neutral point current; Neutral point voltage
- Issue Date
- 2014-10
- Publisher
- 전력전자학회
- Citation
- 전력전자학회논문지, 19권, 5호, pp.407-414
- Abstract
- This study proposes a control design for the grid output current and for reducing the neutral-point voltage oscillation through the small-signal modeling of the three-phase grid connected with a three-level neutral-point-clamped (NPC) inverter with LCL filter. The three-level NPC inverter presents an inherent problem: the neutral-point voltage fluctuation caused by the neutral-point current flowing in or out from the neutral point. The small signal modeling consists of averaging, dq0 transformation, perturbing, and linearizing steps performed on a three-phase grid connected to a three-level NPC inverter with LCL filter. The proposed method controls both the grid output and neutral-point currents at every switching period and reduces the neutral-point voltage oscillation. The validity of the proposed method is verified through simulation and experiment.
- URI
- http://www.dbpia.co.kr/Article/NODE02486516http://hdl.handle.net/20.500.11754/52346
- ISSN
- 1229-2214
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ELECTRICAL AND BIOMEDICAL ENGINEERING(전기·생체공학부) > Articles
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