Min-Gyo Jeong, Seok-Min Kim, June-Seok Lee, and Kyo-Beum Lee, "Discontinuous PWM Scheme for Switching Losses Reduction in Modular Multilevel Converters," Journal of Power Electronics, vol. 17, no. 6, pp. 1490–1499, Nov. 2017. -SCIE > Paper

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Paper

International Journals Min-Gyo Jeong, Seok-Min Kim, June-Seok Lee, and Kyo-Beum Lee, "Discontinuous PWM Scheme for Switching Losses Reduction in Modular Multilevel Converters," Journal of Power Electronics, vol. 17, no. 6, pp. 1490–1499, Nov. 2017. -SCIE

2017

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The modular multilevel converter (MMC) is generally considered to be a promising topology for medium-voltage and high-voltage

applications. However, in order to apply it to high-power applications, a huge number of switching devices is essential. The

numerous switching devices lead to considerable switching losses, high cost and a larger heat sink for each of the switching device.

In order to reduce the switching losses of a MMC, this paper analyzes the performance of the conventional discontinuous pulse-

width modulation (DPWM) method and its efficiency. In addition, it proposes a modified novel DPWM method for advanced

switching losses reduction. The novel DPWM scheme includes an additional rotation method for voltage-balancing and power

distribution among sub modules (SMs). Simulation and experimental results verify the effectiveness and performance of the

proposed modulation method in terms of its switching losses reduction capability. 

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