一种基于桥臂耦合电感的自然限流型模块化多电平换流器

doi:10.19595/j.cnki.1000-6753.tces.L80475

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摘要环流、直流电流波动和直流侧故障电流抑制问题是模块化多电平换流器（MMC）发展过程中面临的重要难点,为增强系统对三者的抑制效果,提出一种基于桥臂耦合电感的自然限流型多电平换流器（ACINCL-MMC）。首先分析ACINCL-MMC的工作原理,在建立其交直流侧数学模型的基础上,研究桥臂电感耦合程度与环流、直流电流波动和直流侧故障电流的关系,详细地剖析桥臂耦合电感的自然限流作用,并进一步探讨桥臂耦合电感取代直流平波电抗的可行性。最后,仿真和实验结果验证了所提理论的有效性。

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	王有云
	杨晓峰
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	陈博伟

关键词 ：模块化多电平换流器, 桥臂耦合电感, 自然限流, 环流, 故障电流

Abstract：The circulating current, the DC current fluctuation and DC fault current suppressing are important issues for modular multilevel converter (MMC). In order to enhance the suppressing effect of the system on the above three, the arm coupling inductor based natural current limiting MMC (ACINCL-MMC) is proposed in this paper. The operation principle analysis of ACINCL-MMC is carried out firstly. Based on the mathematical modeling of both the AC side and DC side, the relationship between the arm inductor coupling degree and the circulating current, the DC current fluctuation and the DC fault current is studied. The natural current limiting effect of arm coupling inductor is analyzed in detail. Moreover, it further reveals the possibility of using arm coupling inductor instead of DC smoothing reactance. Finally, simulation results show the effectiveness of the proposed theory.

Key words： Modular multilevel converter arm coupling inductor natural current limiting circulating current fault current

收稿日期: 2018-06-28 出版日期: 2019-02-15

PACS:

TM76

基金资助:大型电气传动系统与装备技术国家重点实验室开放基金（SKLLDJ042016005）和国家重点研发计划（2016YFE0131700）资助项目

通讯作者: 杨晓峰男,1980年生,博士,副教授,研究方向为多电平变换器技术、柔性直流输电技术、电力电子技术在轨道交通中的应用。E-mail: xfyang@bjtu.edu.cn

作者简介: 王有云男,1968年生,高级工程师,研究方向为电力传动技术。E-mail: wyy@vip.163.com

引用本文:

王有云, 杨晓峰, 李泽杰, 薛尧, 陈博伟. 一种基于桥臂耦合电感的自然限流型模块化多电平换流器[J]. 电工技术学报, 2018, 33(zk2): 479-488. Wang Youyun, Yang Xiaofeng, Li Zejie, Xue Yao, Chen Bowei. Arm Coupling Inductor Based Natural Current Limiting Modular Multilevel Converter. Transactions of China Electrotechnical Society, 2018, 33(zk2): 479-488.

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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.L80475 https://dgjsxb.ces-transaction.com/CN/Y2018/V33/Izk2/479

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