Min-Gyo Jeong, “모듈형 멀티레벨 컨버터의 스위칭 손실 저감을 위한 하이브리드 변조 기법,” 아주대학교 공학석사 학위 논문, 2018. > Paper

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Paper

Thesis Min-Gyo Jeong, “모듈형 멀티레벨 컨버터의 스위칭 손실 저감을 위한 하이브리드 변조 기법,” 아주대학교 공학석사 학위 논문, 2018.

2018

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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 pulsewidth 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.

 

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