| 引用本文: | 王锐,王毅,高玉华,苏子萌,吴笑音,于义轩.面向轻型化海上换流站的多桥臂复用型MMC拓扑及其能量均衡控制策略[J].电力自动化设备,2025,45(12):178-186. |
| WANG Rui,WANG Yi,GAO Yuhua,SU Zimeng,WU Xiaoyin,YU Yixuan.Diversified arm multiplexing MMC topology for lightweight offshore converter stations and energy balance control strategy[J].Electric Power Automation Equipment,2025,45(12):178-186. |
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| 摘要: |
| 为了提高海上风电场景中模块化多电平换流器(MMC)的轻型化程度，提出了一种多桥臂复用型换流器(DAM-MMC)。DAM-MMC基于多桥臂分时复用的思想，引入了相单元桥臂复用的运行模式，实现子模块及其电容数量的大幅降低。在实现轻型化的基础上，DAM-MMC进一步复用直流侧桥臂，提出了全导通运行模式，从而实现该换流器的能量自均衡。由此，DAM-MMC可以通过对多桥臂的复用，在变化的调制比下维持子模块电容电压的稳定，实现灵活的宽范围运行。与MMC相比，该拓扑的子模块及其电容数量减少了约54 %。通过MATLAB/Simulink仿真平台验证了所提拓扑及控制策略的可行性。 |
| 关键词: 海上风电 直流输电 模块化多电平换流器 轻型化 桥臂复用 |
| DOI：10.16081/j.epae.202510004 |
| 分类号:TM46 |
| 基金项目:国家自然科学基金资助项目(52077079)；国网浙江省电力有限公司科技项目(5211DS24000D) |
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| Diversified arm multiplexing MMC topology for lightweight offshore converter stations and energy balance control strategy |
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WANG Rui, WANG Yi, GAO Yuhua, SU Zimeng, WU Xiaoyin, YU Yixuan
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State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Baoding 071003, China
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| Abstract: |
| To improve the lightweight degree of modular multilevel converter(MMC) in offshore wind power scenarios, a diversified arm multiplexing converter(DAM-MMC) is proposed. Based on the idea of diversified arm time-sharing multiplexing, the operation mode of phase unit arm multiplexing of DAM-MMC is introduced, which achieves a significant reduction in the number of sub-modules and their capacitors. Based on the realization of lightweight, DAM-MMC further reuses the DC arm, and a fully conductive operation mode is proposed, thereby achieving the energy self-balancing of the converter. Thus, DAM-MMC can maintain the stability of the capacitor voltage of sub-modules under varying modulation ratios through the multiplexing of diversified arms, achieving flexible wide-range operation. Compared with MMC, the sub-modules of this topology and their capacitance numbers are reduced by approximately 54 %. The feasibility of the proposed topology and control strategy is verified through the simulation of MATLAB/Simulink. |
| Key words: offshore wind power direct current transmission MMC lightweight arm multiplexing |
