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Novel 4-level Submodule based Modular Multilevel Rectifier |
Li Yue, Lu Zhiguo, Wang You, Luo Qiuyin |
State Key Laboratory of Power Transmission Equipment and System Security, Chongqing University, Chongqing 400044 |
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Abstract Modular multilevel converter has emerged as a more viable solution over conventional voltage source converters for applications in high voltage direct current transmission due to its modular structure, which leads to high number of voltage levels resulting in low switching frequency and near sinusoidal voltage waveforms. The traditional full-bridge MMC submodule is able to generate 0、1 voltage levels to the output. This paper proposes a new submodule topologies which can generate 4 voltage levels of 0、1、2、3. Therefore, under the condition that the converter needs to achieve the same level of output, the number of needed submodules on new submodule based MMC is only 2/3 of the half bridge submodule based MMC, which can reduce the size of converter significantly. Meanwhile, the number of IGBT switches is reduced by 1/6 compared to half bridge submodule based MMC system. The nearest level modulation (nearest level, modulation, NLM) and modified voltage balancing algorithm is proposed for the new topology and is validated by Matlab/Simulink simulations. The validate of the new submodule and the proposed method is verified by simulation results.
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Published: 20 September 2017
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[1] Rohner S, Bernet S, Hiller M, et al. Pulse width modulation scheme for the modular multilevel converter[C]//EPE: 2009 13TH EUROPEAN CONFERENCE ON POWER ELECTRONICS AND APPLICATIONS, VOLS 1-9, 2009: 1158. [2] Gemmell B, Dom J, Retzmann D, et al. Prospects of multilevel VSC technologies for power transmission: IEEE/PES Transmission and Distribution Conference and Exposition, 2008[C]. [3] 郭玥, 张红斌, 杨卫红, 等. 柔性直流输电在城市配电网应用中的仿真研究[J]. 电气技术, 2015, 16(6): 14-19. [4] 张建坡, 赵成勇, 孙海峰, 等. 模块化多电平换流器改进拓扑结构及其应用[J]. 电工技术学报, 2014, 29(8): 173-179. [5] Malinowski M, Gopakumar K, Rodriguez J, et al. A survey on cascaded multilevel inverters[J]. IEEE Transactions on Industrial Electronics, 2010, 57(7): 2197-2206. [6] H Akagi C, application of the modular multilevel cascade converter. MMCC[J]. IEEE Trans Power Electron, 2011, 26(11): 3119-3130. [7] Westerweller T, Friedrich K, Armonies U, et al. Trans bay cable world's first HVDC system using multilevel voltage sourced converter[C]//Proceedings of CIGRE. Paris, France: CIGRE, 2010. [8] Shen K, Liu C, Wang J, et al. A stochastic optimal approach for fundamental frequency modu- lated modular multilevel converter[C]//in Proc. IEEE Power & Energy Society General Meeting (PESGM), San Diego, CA, USA, 2012: 1-6. [9] Hagiwara M, Nishimura K, Akagi H. A medium- voltage motor drive with a modular multilevel PWM inverter[J]. IEEE Transactions on Power Electronics, 2010, 25(7): 1786-1799. [10] Davles M, Dommaschk M, Dom J, et al. HVDC plus basics and principle ofoperation[Z]. 2011. [11] Dorn J, Huang H, Retzmanm D. A new multilevel voltage-sourced converter topology for HVDC appli- cations[C]//CIGRE Session. Paris, Fracnce: CIGRE, 2008. [12] 汤广福. 基于电压源换流器的柔性直流输电技术[M]. 北京: 中国电力出版社, 2009. [13] Rodriguez J, Correa P, Moran L. A vector control technique for medium voltage multilevel inverters[C]// in Proc. IEEE Applied Power Electronics Conference and Exposition(APEC), Anaheim, CA, USA, 2001: 173-178. [14] 游林旭, 王锐凤, 郭谋发. 基于CPS-SPWM的级联H桥多电平逆变器控制方法[J]. 电气技术, 2016, 17(9): 5-11. [15] 黄守道, 彭也伦, 廖武. 模块化多电平型变流器电容电压波动及其抑制策略研究[J]. 电工技术学报, 2015, 30(7): 62-71. |
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