低容值半桥型模块化多电平变换器直流故障辅助清除策略

doi:10.19595/j.cnki.1000-6753.tces.211233

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Abstract The current injection method can reduce the capacitance value of bridge arm sub modules (SMs), thereby reducing the volume and weight of MMC, and realizing the lightweight of MMC. Based on the theoretical analysis of the characteristics of low capacitance MMC in DC fault conditions, it is pointed out that the discharge speed of SM sunder low capacitance is fast when other parameters remain unchanged, which may lead to low voltage blocking of SMs during the DC fault clearing process. From the perspective of equivalent charge, a DC fault clearing strategy based on low capacitance half bridge MMC is proposed. By adjusting the total number of SMs in each phase according to the capacitance reduction ratio in MMC during the fault clearing process, the discharge capacity of the SM capacitors can be effectively reduced and the system recovery can be accelerated. A simulation program is built in PSCAD/EMTDC simulation environment, and the effectiveness of auxiliary strategy for DC fault clearing in low capacitance MMC is verified.

Key words： Current injection low capacitance half-bridge MMC equivalent charge fast recovery DC fault clearing strategy experimental verification

Received: 09 August 2021

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TM721.1

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	Articles by authors
	Fan Qiang
	Yu Yongjie
	Xia Jiahang
	Zhao Chengyong
	Xu Jianzhong

Cite this article:

Fan Qiang,Yu Yongjie,Xia Jiahang等. Auxiliary Strategy for DC Fault Clearing of Low Capacitance[J]. Transactions of China Electrotechnical Society, 2022, 37(14): 3713-3722.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.211233 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I14/3713

[1] Lesnicar A, Marquardt R, An innovative modular multilevel converter topology suitable for a wide power range[C]//2003 IEEE Bologna Power Tech Conference Proceedings, Bologna, Italy, 2003, DOI: 10.1109/PTC.2003.1304403.
[2] 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 trans-mission system[J]. Transactions of China Electro-technical Society, 2015, 30(17): 1-12.
[3] 谭翔宇, 任丽, 唐跃进, 等. 饱和铁心型超导限流器在柔直系统中的限流特性研究[J]. 电工技术学报, 2020, 35(增刊2): 556-561.
Tan Xiangyu, Ren Li, Tang Yuejin, et al.Study on the current-limiting characteristics of saturated iron core superconducting fault current limiter in MMC-HVDC system[J]. Transactions of China Electrotechnical Society, 2020, 35(S2): 556-561.
[4] 孟沛彧, 王志冰, 迟永宁, 等. 适应多能源基地远距离输送电能的混合四端直流输电系统控制策略研究[J]. 电工技术学报, 2020, 35(增刊2): 523-534.
Meng Peiyu, Wang Zhibing, Chi Yongning, et al.Control strategy of hybrid four-terminal HVDC trans-mission system dedicated for long-distance power delivery from multiple energy bases[J]. Transactions of China Electrotechnical Society, 2020, 35(S2): 523-534.
[5] 李英, 胡佳欣. “碳达峰、碳中和”两会精神对我国电力行业发展的影响[J]. 大众用电, 2021, 36(3): 10-11.
Li Ying, Hu Jiaxin.Influence of the two Sessions' spirits of “peak carbon dioxide emissions and carbon neutrality” on power industry development in China[J]. Popular Utilization of Electricity, 2021, 36(3): 10-11.
[6] 许建中, 李钰, 陆锋, 等. 降低MMC子模块电容电压纹波幅值的方法综述[J]. 中国电机工程学报, 2019, 39(2): 571-584, 654.
Xu Jianzhong, Li Yu, Lu Feng, et al.A review of suppression methods for sub-module capacitor voltage ripple amplitudes in modular multilevel converters[J]. Proceedings of the CSEE, 2019, 39(2): 571-584, 654.
[7] 李凯, 赵争鸣, 袁立强, 等. 基于能量平衡的降低模块化多电平变换器子模块电容电压波动控制策略[J]. 电工技术学报, 2017, 32(14): 17-26.
Li Kai, Zhao Zhengming, Yuan Liqiang, et al.Con-trolstrategy based on the energy balance for reducing submodule capacitor voltage fluctuation of modular multilevel converter[J]. Transactions of China Elec-trotechnical Society, 2017, 32(14): 17-26.
[8] 屠卿瑞, 徐政, 管敏渊, 等. 模块化多电平换流器环流抑制控制器设计[J]. 电力系统自动化, 2010, 34(18): 57-61, 83.
Tu Qingrui, Xu Zheng, Guan Minyuan, et al.Design of circulating current suppressing controllers for modular multilevel converter[J]. Automation of Electric Power Systems, 2010, 34(18): 57-61, 83.
[9] Engel S P, De Doncker R W. Control of the modular multi-level converter for minimized cell capacitance[C]//Proceedings of 14th European Conference on Power Electronics and Applications, Birmingham, 2011: 1-10.
[10] Vasiladiotis M, Cherix N, Rufer A.Accurate capacitor voltage ripple estimation and current control considerations for grid-connected modular multilevel converters[J]. IEEE Transactions on Power Elec-tronics, 2014, 29(9): 4568-4579.
[11] Li Rui, Fletcher J E, Williams B W.Influence of third harmonic injection on modular multilevel converter-based high-voltage direct current transmission systems[J]. IET Generation, Transmission & Distri-bution, 2016, 10(11): 2764-2770.
[12] Guo Gaopeng, Song Qiang, Yang Wenbo, et al.Appli-cation of third-order harmonic voltage injection in a modular multilevel converter[J]. IEEE Transactions on Industrial Electronics, 2018, 65(7): 5260-5271.
[13] 董鹏, 蔡旭, 吕敬. 大幅减小子模块电容容值的MMC优化方法[J]. 中国电机工程学报, 2018, 38(18): 5369-5380.
Dong Peng, Cai Xu, Lü Jing.Optimized method of MMC for greatly reducing the capacitance of the submodules[J]. Proceedings of the CSEE, 2018, 38(18): 5369-5380.
[14] Xu Jianzhong, Deng Weicheng, Gao Chenxiang, et al.Dual harmonic injection for reducing the sub-module capacitor voltage ripples of hybrid MMC[J]. IEEE Journal of Emerging and Selected Topics in Power Electronics, 2021, 9(3): 3622-3633.
[15] 施恩泽, 吴学智, 荆龙, 等. 网压不平衡下环流注入对模块化多电平换流器的影响分析[J]. 电工技术学报, 2018, 33(16): 3719-3731.
Shi Enze, Wu Xuezhi, Jing Long, et al.Analysis of the impact on modular multilevel converter with circulating current injection under unbalanced grid voltage[J]. Transactions of China Electrotechnical Society, 2018, 33(16): 3719-3731.
[16] 李钰, 陆锋, 樊强, 等. 不平衡电网电压下的MMC子模块电压波动抑制方法[J]. 电力系统自动化, 2020, 44(4): 91-100.
Li Yu, Lu Feng, Fan Qiang, et al.Suppression method for voltage fluctuation of sub-module in multilevel modular converter with unbalanced power grid voltage[J]. Automation of Electric Power Systems, 2020, 44(4): 91-100.
[17] Wang Sheng, Li Chuanyue, Adeuyi O D, et al.Coordination of MMCs with hybrid DC circuit breakers for HVDC grid protection[J]. IEEE Transa-ctions on Power Delivery, 2018, 34(1): 11-22.
[18] 徐政. 柔性直流输电系统[M]. 2版. 北京: 机械工业出版社, 2016.
[19] 周光阳, 李妍, 何大瑞, 等. 含限流器的多端柔直系统故障保护策略[J]. 电工技术学报, 2020, 35(7): 1432-1443.
Zhou Guangyang, Li Yan, He Darui, et al.Protection scheme for VSC-MTDC system with fault current limiter[J]. Transactions of China Electrotechnical Society, 2020, 35(7): 1432-1443.