Arm Coupling Inductor Based Natural Current Limiting Modular Multilevel Converter
Wang Youyun1, Yang Xiaofeng2, Li Zejie2, Xue Yao2, Chen Bowei2
1. Tianshui Electric Drive Research Institute Co. Ltd Tianshui 741020 China; 2. School of Electrical Engineering Beijing Jiaotong University Beijing 100044 China
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.
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.
[1] 徐殿国, 刘瑜超, 武健. 多端直流输电系统控制研究综述[J]. 电工技术学报, 2015, 30(17): 1-12. Xu Dianguo, Liu Yuchao, Wu Jian.Review on control strategies of multi-terminal direct current transmission system[J]. Transactions of China Elec- trotechnical Society, 2015, 30(17): 1-12. [2] 罗永捷, 李耀华, 王平, 等. 多端柔性直流输电系统下垂控制P-V特性曲线时域分析[J]. 电工技术学报, 2014, 29(1): 408-415. Luo Yongjie, Li Yaohua, Wang Ping, et al.Time- domain analysis of P-V characteristic for droop control strategy of VSC-MTDC transmission system[J]. Transactions of China Electrotechnical Society, 2014, 29(1): 408-415. [3] Debnath Suman, Qin Jiangchao, Bahrani Behrooz, et al.Operation, control, and applications of the modular multilevel converter: a review[J]. IEEE Transactions on Power Electronics, 2015, 30(1): 37-53. [4] 马为民, 吴方劼, 杨一鸣, 等. 柔性直流输电技术的现状及应用前景分析[J]. 高电压技术, 2014, 40(8): 2429-2439. Ma Weimin, Wu Fangjie, Yang Yiming, et al.Flexible HVDC transmission technology’s today and tomorrow[J]. High Voltage Technology, 2014, 40(8): 2429-2439. [5] 杨晓峰, 郑琼林, 薛尧, 等. 模块化多电平换流器的拓扑和工业应用综述[J]. 电网技术, 2016, 40(1): 1-10. Yang Xiaofeng, Zheng Qionglin, Xue Yao, et al.Review on topology and industry applications of modular multilevel converter[J]. Power System Technology, 2016, 40(1): 1-10. [6] 常浩, 厉璇, 马玉龙, 等. 舟山多端柔性直流输电工程直流系统放电特性[J]. 高电压技术, 2017, 43(1): 9-15. Chang Hao, Li Xuan, Ma Yulong, et al.Discharge characteristics of DC system in Zhoushan multi- terminal VSC-HVDC transmission project[J]. High Voltage Technology, 2017, 43(1): 9-15. [7] 楚遵方, 李耀华, 王平, 等. 柔性直流输电系统中模块化多电平变流器的直流侧充电策略分析[J]. 电工技术学报, 2015, 30(12): 136-142. Chu Zunfang, Li Yaohua, Wang Ping, et al.Analysis of charging strategy by DC grid of modular multilevel converter in high voltage direct current transmission system[J]. Transactions of China Electrotechnical Society, 2015, 30(12): 136-142. [8] 杨晓峰, 范文宝, 王晓鹏, 等. 基于模块组合多电平变换器的STATCOM及其控制[J]. 电工技术学报, 2011, 26(8): 7-13. Yang Xiaofeng, Fan Wenbao, Wang Xiaopeng, et al.Static synchronous compensator based on modular multilevel converter based STATCOM and its control[J]. Transactions of China Electrotechnical Society, 2011, 26(8): 7-13. [9] 张建坡, 赵成勇. 模块化多电平换流器环流及抑制策略研究[J]. 电工技术学报, 2013, 28(10): 328-336. Zhang Jianpo, Zhao Chengyong.Research on Circulation current and suppressing strategy of modular multilevel converter[J]. Transactions of China Electrotechnical Society, 2013, 28(10): 328-336. [10] 屠卿瑞, 徐政, 郑翔, 等. 模块化多电平换流器型直流输电内部环流机理分析[J]. 高电压技术, 2010, 36(2): 547-552. Tu Qingrui, Xu Zheng, Zheng Xiang, et al.Mechanism analysis on the circulating current in modular multilevel converter based HVDC[J]. High Voltage Engineering, 2010, 36(2): 547-552. [11] 阎发友, 汤广福, 贺之渊, 等. 一种适用于模块化多电平换流器的新型环流控制器[J]. 电力系统自动化, 2014, 38(1): 104-108. Yan Fayou, Tang Guangfu, He Zhiyuan, et al.A novel circulating controller for modular multilevel converter[J]. Automation of Electric Power Systems, 2014, 38(1): 104-108. [12] 杨晓峰, 林智钦, 周楚尧, 等. 模块化多电平换流器MMC的环流抑制技术综述[J]. 电源学报, 2015, 13(6): 58-68. Yang Xiaofeng, Lin Zhiqin, Zhou Chuyao, et al.Survey of circulating current suppressing tech- nologies in MMC[J]. Journal of Power Supply, 2015, 13(6): 58-68. [13] 杨晓峰, 李泽杰, 郑琼林. 基于虚拟阻抗滑模控制的MMC环流抑制策略[J]. 中国电机工程学报, 2018, 38(23): 6893-6904. Yang Xiaofeng, Li Zejie, Zheng Qionglin.A novel MMC circulating current suppressing strategy based on virtual impedance sliding mode control[J]. Proceedings of the CSEE, 2018, 38(23): 6893-6904. [14] 张国驹, 祁新春, 陈瑶, 等. 模块化多电平换流器直流双极短路特性分析[J]. 电力系统自动化, 2016, 40(12): 151-157. Zhang Guoju, Qi Xinchun, Chen Yao, et al.Characteristic analysis of modular multilevel con- verter under DC pole-to-pole short-circuit fault[J]. Automation of Electric Power Systems, 2016, 40(12): 151-157. [15] 郝瑞祥, 杨晓峰, 薛尧, 等. 一种具有直流故障限流能力的模块化多电平换流器[J]. 电工技术学报, 2017, 32(6): 172-180. Hao Ruixiang, Yang Xiaofeng, Xue Yao, et al.A novel modular multilevel converter with DC fault current limiting capability[J]. Transactions of China Electrotechnical Society, 2017, 32(6): 172-180. [16] Leterme Willem, Beerten Jef, Hertem Dirk Van.Equivalent circuit for half-bridge MMC DC fault current contribution[C]//IEEE International Energy Conference, Leuven, Belgium, 2016: 1-6. [17] Yang Xiaofeng, Xue Yao, Chen Bowei, et al.Reverse-blocking modular multilevel converter for battery energy storage systems[J]. Journal of Modern Power Systems and Clean Energy, 2017, 5(4): 652-662. [18] 李斌, 李晔, 何佳伟. 具有直流故障清除能力的MMC子模块关键性能研究[J]. 中国电机工程学报, 2016, 36(8): 2114-2122. Li Bin, Li Ye, He Jiawei.Research on the key properties of MMC sub-modules with DC fault eliminating capability[J]. Proceedings of the CSEE, 2016, 36(8): 2114-2122. [19] 吴婧, 姚良忠, 王志冰, 等. 直流电网MMC拓扑及其直流故障电流阻断方法研究[J]. 中国电机工程学报, 2015, 35(11): 2681-2694. Wu Jing, Yao Liangzhong, Wang Zhibing, et al.The study of MMC topologies and their DC fault current blocking capacities in DC grid[J]. Proceedings of the CSEE, 2015, 35(11): 2681-2694. [20] 刘高任, 许烽, 徐政, 等. 适用于直流电网的组合式高压直流断路器[J]. 电网技术, 2016, 40(1): 70-77. Liu Gaoren, Xu Feng, Xu Zheng, et al.An assembled HVDC breaker for HVDC grid[J]. Power System Technology, 2016, 40(1): 70-77. [21] 姚良忠, 吴婧, 王志冰, 等. 柔性高压直流环网直流侧故障保护策略研究[J]. 中国电机工程学报, 2017, 37(增刊1): 1-11. Yao Liangzhong, Wu Jing, Wang Zhibing, et al.Studies on DC fault protection strategies for MMC based HVDC grid[J]. Proceedings of the CSEE, 2017, 37(S1): 1-11. [22] Shi Xiaojie, Wang Zhiqiang, Tolbert Leon M, et al.Modular multilevel converters with integrated arm inductors for high quality current waveforms[C]// IEEE ECCE Asia Downunder, Melbourne, Australia, 2013: 636-642. [23] 袁义生, 朱本玉. 一种基于耦合电感的模块化多电平变流器控制[J]. 电工技术学报, 2015, 30(6): 216-224. Yuan Yisheng, Zhu Benyu.Control strategy of a modular multilevel converter based on coupled inductor[J]. Transactions of China Electrotechnical Society, 2015, 30(6): 216-224. [24] 薛利坤, 王萍, 王议锋, 等. 基于开关电容和耦合电感的交错并联型高电压增益双向DC-DC变换器[J]. 电工技术学报, 2016, 31(24): 181-187, 194. Xue Likun, Wang Ping, Wang Yifeng, et al.Interleaved high gain bidirectional DC-DC converter with switched capacitor and coupled inductor[J]. Transactions of China Electrotechnical Society, 2016, 31(24): 181-187, 194. [25] 吕林娜, 肖岚, 祁琦. 三相双降压逆变器中电感的磁集成方式比较与优化设计[J]. 电工技术学报, 2016, 31(13): 55-63. Lü Linna, Xiao Lan, Qi Qi.Comparison and optimal design for magnetic integration methods of inductors in three-phase dual-Buck inverters[J]. Transactions of China Electrotechnical Society, 2016, 31(13): 55-63. [26] 杜砚, 陈轩恕, 刘飞, 等. 用于并联断路器的紧耦合电抗器设计[J]. 高电压技术, 2009, 35(11): 2870-2875. Du Yan, Chen Xuanshu, Liu Fei, et al.Design of coupled reactors used for parallel circuit breakers[J]. High Voltage Technology, 2009, 35(11): 2870-2875.
2018, Vol. 33 
