| 引用本文: | 李仲青,何佳伟,李永丽,李伟.具有交流源完全阻断能力的混合式MMC拓扑[J].电力自动化设备,2018,(3): |
| LI Zhongqing,HE Jiawei,LI Yongli,LI Wei.Hybrid MMC topology with complete AC-side source blocking capability[J].Electric Power Automation Equipment,2018,(3): |
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| 摘要: |
| 在具有直流故障清除能力的多种模块化多电平换流器(MMC)子模块中，箝位双子模块投资成本和附加损耗最低，但是交流源阻断能力相对较弱；串联双子模块和增强自阻型子模块交流源阻断能力足够强，但是投资成本和附加损耗较大。结合不同类型子模块所具备的不同优势，设计了一种混合式MMC拓扑结构。以闭锁后交流源完全阻断为约束，以投资成本、附加损耗最低为目标，提出了子模块数量的混合配置原则。基于MATLAB/Simulink仿真平台搭建相应的基于不同子模块的柔性直流系统模型，通过大量的仿真测试验证了理论分析的正确性以及所设计的混合式MMC拓扑的可行性。 |
| 关键词: 柔性直流系统 模块化多电平换流器 故障隔离 交流源阻断 混合式拓扑 |
| DOI：10.16081/j.issn.1006-6047.2018.03.013 |
| 分类号:TM46 |
| 基金项目:国家重点研发计划智能电网技术与装备重点专项(2016-YFB0900600)；国家电网公司科技项目(52094017000W) |
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| Hybrid MMC topology with complete AC-side source blocking capability |
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LI Zhongqing1, HE Jiawei1, LI Yongli1, LI Wei2
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1.Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China;2.State Key Laboratory of Power Grid Safety and Energy Conservation, China Electric Power Research Institute, Beijing 100192, China
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| Abstract: |
| In several kinds of MMC(Modular Multilevel Converter) sub-modules with DC fault eliminating capability, the clamp double sub-module has the lowest investment cost and additional power loss but relatively weaker AC-side source blocking capability, nevertheless, the series double sub-module and self-blocking sub-module have strong enough AC-side source blocking capability but high investment cost and additional power loss. According to the different advantages of different sub-modules, a hybrid MMC topology is de-signed. Taking the requirement of the complete AC-side source blocking as the constraints and the lowest investment cost and additional power loss as the objectives, the sub-module number calculation principle is proposed. The simulation models of flexible DC system based on different sub-modules are built with MATLAB/Simulink, and the simulative results verify the correctness of theoretical analysis and the feasibility of the proposed hybrid MMC topology. |
| Key words: flexible DC system modular multilevel converter fault isolation AC-side source blocking hybrid topology |
