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모듈형 멀티레벨 컨버터의 스위칭 손실 저감을 위한 하이브리드 변조 기법
- Alternative Title
- A Hybrid Modulation Method for Switching Losses Reduction in Modular Multilevel Converters
- Author(s)
- 정민교
- Advisor
- 이교범
- Department
- 일반대학원 전자공학과
- Publisher
- The Graduate School, Ajou University
- Publication Year
- 2018-02
- Language
- eng
- Keyword
- 모듈형 멀티레벨 컨버터; 스위칭 손실 저감
- Alternative Abstract
- This paper proposes a novel modulation technique for switching losses reduction in modular multilevel converters (MMCs). The MMC is considered as the development trend topology for medium- and high-voltage applications. However, the MMC requires numerous power devices to generate demanded output quality. Plenty of power devices generate enormous power losses for the system with requiring high cost and a large heat sink for each of the device. For that reason, this paper proposes the hybrid modulation method for the switching losses reduction in the MMC. The proposed modulation scheme combines fundamental-frequency modulation (FFM) scheme and phase-shifted carrier based pulse-width modulation (PS-PWM) scheme. In addition, an additional rotation method is included for voltage-balancing and power distribution among the sub-modules (SMs). Finally, the power losses of three-phase MMC are decreased with retained good output quality of the system. Simulation and experimental results are included to show and verify the performance of proposed hybrid modulation method.
- Fulltext
- Appears in Collections:
- Graduate School of Ajou University > Department of Electronic Engineering > 3. Theses(Master)
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