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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2019.11
- 수록면
- 1,496 - 1,504 (9page)
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초록· 키워드
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This paper proposes a new THD reduction algorithm for modular multilevel converters (MMCs) with offset voltage injection operated in nearest level modulation (NLM). High voltage direct current (HVDC) is actively introduced to the grid connection of offshore wind powers, and this paper deals with a voltage generation technique with an MMC for wind power generation. In the proposed method, third harmonic voltage is added for reducing the THD. The third harmonic voltage is adjusted so that each of the pole voltage magnitudes maintains a constant value with a maximum number of (N+1) levels, where N is the number of sub-modules per arm. By using the proposed method, the THD of the output voltage is mitigated without increasing the switching frequency. In addition, the proposed method has advantageous characteristics such as simple implementation. As a part of this study, this paper compares the THD results of the conventional method and the proposed method with offset voltage injection to reduce the THD. In this paper, simulations have been carried out to verify the effectiveness of the proposed scheme, and the proposed method is implemented by a HILS (Hardware in the Loop Simulation) system. The obtained results show agreement with the simulation results. It is confirmed that the new scheme achieved the maximum level output voltage and improved the THD quality.
목차
Abstract
I. INTRODUCTION
II. OPERATIONAL CHARACTERISTICS OF AN MMC
III. PROPOSED METHOD FOR REDUCING THE THD IN THE OUTPUT VOLTAGE
IV. COMPARISON OF MODULATION SCHEMES THAT UTILIZE OFFSET VOLTAGE INJECTION
V. SIMULATION RESULTS
VI. EXPERIMENTAL RESULTS
VII. CONCLUSIONS
REFERENCES
참고문헌 (19)
참고문헌 신청
R. Marquardt, “Stromrichterschaltungen mit verteilten energiespeichrn,” German Patent, DE10103031A1, 24 Jan. 2001.
T. Li and C. Zhao, “Characteristic analysis and fault-tolerant control of modular multilevel converters under sub-module faults,” Int. Trans Electr. Energy Syst., Vol. 26, No. 7, pp. 1444-1461, Jul. 2016.
G. Bergna, E. Berne, P. Egrot, P. Lefrance, A. Arzande, J. Vannier, and M. Molinas, “An energy based controller for HVDC modular multilevel converter in decoupled double synchronous reference frame for voltage oscillation,” IEEE Trans. Ind. Electron., Vol. 60, No. 6, pp. 2360-2371, Jun. 2013.
I. Gowaid, G. Adam, S. Ahmed, D. Holliday, and B. Williams, “Analysis and design of a modular multilevel converter with trapezoidal modulation for medium and high voltage dc-dc transformers,” IEEE Trans Power Electron., Vol. 30, No. 10, pp. 5439-5457, Oct. 2015.
S. Gangquan, J. Zhu, Y. Lei, L. Jia, and Y. Zhang, “An enhanced level increased nearest level modulation modular multilevel converter,” Int. Trans Electr. Energ. Syst., Vol. 29, No. 1, Aug. 2018.
T. Li and C. Zhao, “Characteristic analysis and fault-tolerant control of modular multilevel converters under sub-module faults,” Int. Trans Electr. Energy Syst., Vol. 26, No. 7, pp. 1444-1461, Jul. 2016.
G. Bergna, E. Berne, P. Egrot, P. Lefrance, A. Arzande, J. Vannier, and M. Molinas, “An energy based controller for HVDC modular multilevel converter in decoupled double synchronous reference frame for voltage oscillation,” IEEE Trans. Ind. Electron., Vol. 60, No. 6, pp. 2360-2371, Jun. 2013.
I. Gowaid, G. Adam, S. Ahmed, D. Holliday, and B. Williams, “Analysis and design of a modular multilevel converter with trapezoidal modulation for medium and high voltage dc-dc transformers,” IEEE Trans Power Electron., Vol. 30, No. 10, pp. 5439-5457, Oct. 2015.
S. Gangquan, J. Zhu, Y. Lei, L. Jia, and Y. Zhang, “An enhanced level increased nearest level modulation modular multilevel converter,” Int. Trans Electr. Energ. Syst., Vol. 29, No. 1, Aug. 2018.
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