전력전자학회논문지 (The Transactions of the Korean Institute of Power Electronics)

  • 제27권6호
  • /
  • Pages.526-534
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  • 2022
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  • 1229-2214(pISSN)
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  • 2288-6281(eISSN)
전력전자학회 (The Korean Institute of Power Electronics)
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Single-Delta Bridge Cell MMC의 전압합성을 위한 PWM 반송파 형태에 따른 출력전압의 THD 분석

THD Analysis of Output Voltage According to PWM Carriers in Single-Delta Bridge Cell MMC

  • Jae-Myeong, Kim (School of Electronic and Electrical Engineering, IT College, Kyungpook National University) ;
  • Jae-Jung, Jung (School of Electronic and Electrical Engineering, IT College, Kyungpook National University)
  • 투고 : 2022.07.25
  • 심사 : 2022.10.11
  • 발행 : 2022.12.20
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초록

The modular multilevel converter (MMC) has been widely applied to various industrial areas because of its various advantages and structural characteristics. Therefore, many methods for synthesizing the output voltage of MMC have been studied. Among these methods, phase-shifted pulse width modulation (PSPWM) is frequently used in MMC systems because it has diverse merits, such as excellent output qualities even with a small number of cells and uniform power distribution among cells. In this study, the total harmonic distortion (THD) of the output voltage is analyzed in accordance with the number of cells in one arm of a single-delta bridge cell MMC in order to compare PSPWM methods in terms of the THD of the output voltage. The physical characteristics of the triangle and sawtooth carrier waves used for the PSPWM and the mathematical modeling of output voltage are introduced. Then, the obtained results are verified through real-time simulation of a 1 MW single-delta bridge cell MMC system.

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과제정보

본 연구는 2021년도 산업통상자원부의 재원으로 한국에너지기술평가원(KETEP)의 지원을 받아 수행한 연구 과제입니다. (No. 20210501010020) 본 연구는 한국전력공사의 지원을 받아 수행한 연구 과제입니다. (No. R20TA18)

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