Common-Mode Voltage Reduction Method for MMC with Pulse Sequential Connection Asymmetric Carrier Disposition PWM
2022 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)(2022)
摘要
In modular multilevel converter (MMC), the switching behavior of submodules (SMs) will cause the high frequency fluctuation of the common-mode voltage, which may cause serious electromagnetic interference (EMI) problems. In this paper, a pulse sequential connection asymmetric carrier disposition sinusoidal pulse width modulation (PSC-ACD-SPWM) strategy is firstly proposed for MMC to eliminate the fluctuation of the common-mode voltage, which can further suppress the EMI of MMC effectively. Compared with other common-mode EMI suppression modulation strategies, the proposed PSC-ACD-SPWM has a higher utilization rate of DC voltage with the same common-mode EMI suppression effect. A five-level MMC simulation model is established to verify the feasibility and effectiveness of the proposed modulation strategy.
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关键词
mmc,common-mode
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