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새로운 스위칭 기법을 적용한 단상 3-레벨 NPC 인버터의 중성점 전압 제어
- Alternative Title
- Neutral-point voltage control for single-phase three-level NPC inverter applying a novel switching method
- Author(s)
- 이승주
- Advisor
- 이교범
- Department
- 일반대학원 전자공학과
- Publisher
- The Graduate School, Ajou University
- Publication Year
- 2016-02
- Language
- kor
- Alternative Abstract
- This paper presents novel switching method and neutral-point voltage control in single-phase three-level NPC (neutral-point clamped) inverter. Recently, the three-level NPC inverter is widely used in PV (photovoltaic) systems. Therefore, the efficiency has become an important factor. To improve the efficiency, this paper proposes two methods. The first propose is a novel switching method, the concept of which is to fix the switching state of one-leg in the single-phase three-level NPC inverter. As a result, the switching loss is reduced in the single-phase three-level NPC inverter. The second propose is a neutral-point voltage control to improve the MPPT (Maximum Power Point Tracking) operation. The second proposed method is implemented by changing small vectors and modifying the reference signal. Computer simulation and experimental results are provided to verify the performance of the control scheme.
- Fulltext
- Appears in Collections:
- Graduate School of Ajou University > Department of Electronic Engineering > 3. Theses(Master)
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