基于零直流电压控制的混合型MMC-HVDC直流短路故障穿越策略
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摘要
基于模块化多电平换流器的高压直流(MMC-HVDC)短路故障穿越是柔性直流输电技术的重要研究内容。针对混合子模块型MMC-HVDC,提出了基于零直流电压控制的直流短路故障穿越策略,其中上、下桥臂独立控制策略能够在故障穿越过程中保证桥臂能量均衡,负压去游离策略大大提高了直流短路电流清除速度。仿真及实验证明了该策略的有效性,对比闭锁型故障穿越策略,该策略具有故障穿越过程中保持子模块均压、不间断MMC无功功率传输以及缩短MMC重启时间等优势。
DC short circuit fault ride is an important part of HVDC research. In this paper, for hybrid modular multilevel converter in HVDC, a zero DC voltage control based DC fault ride through strategy is proposed, independent control strategy of up and down arms is proposed to keep MMC arm energy balance during the fault ride-through process, negative voltage control for deionization reduction is used to increase fault current obliteration speed. Effectiveness of this zero DC voltage control based DC fault ride-through strategy is verified by simulation and experiment. Compared to MMC-blocked DC fault ride-through strategy, zero DC voltage control based DC fault ride-through strategy has the advantages of sub module voltage balance, uninterrupted reactive power supply and rapid system reboot.
DC short circuit fault ride is an important part of HVDC research. In this paper, for hybrid modular multilevel converter in HVDC, a zero DC voltage control based DC fault ride through strategy is proposed, independent control strategy of up and down arms is proposed to keep MMC arm energy balance during the fault ride-through process, negative voltage control for deionization reduction is used to increase fault current obliteration speed. Effectiveness of this zero DC voltage control based DC fault ride-through strategy is verified by simulation and experiment. Compared to MMC-blocked DC fault ride-through strategy, zero DC voltage control based DC fault ride-through strategy has the advantages of sub module voltage balance, uninterrupted reactive power supply and rapid system reboot.
引文
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[16]Cui Shenghui,Sul S K.A comprehensive DCshort-circuit fault ride through strategy of hybrid modular multilevel converters(MMCs)for overhead line transmission[J].IEEE Transactions on Power Electronics,2016,31(11):7780-7796.
[17]罗永捷,李耀华,李子欣,等.全桥型MMC-HVDC直流短路故障穿越控制保护策略[J].中国电机工程学报,2016,36(7):1933-1943.Luo Yongjie,Li Yaohua,Li Zixin,et al.DC shortcircuit fault ride-through control strategy of fullbridge MMC-HVDC systems[J].Proceedings of the CSEE,2016,36(7):1933-1943.
[18]Lu Maozeng,Hu Jiabing,Lin Lei,et al.Zero DCvoltage ride through of a hybrid modular multilevel converter in HVDC systems[J].IET Renewable Power Generation,2017,11(1):35-43.
[19]冯谟可,郭裕群,许建中.混合型MMC启动策略及全桥子模块数目配置研究[J].华北电力大学学报(自然科学版),2017,44(6):28-35.Feng Moke,Guo Yuqun,Xu Jianzhong.Start-up control strategies of hybrid MMC and configuration of FBSM[J].Journal of North China Electric Power University(Natural Science Edition),2017,44(6):28-35.
[20]许建中,赵鹏豪,江伟,等.具备直流故障穿越能力的混合MMC可靠性分析和冗余配置方法[J].中国电机工程学报,2016,36(4):953-960.Xu Jianzhong,Zhao Penghao,Jiang Wei,et al Reliability analysis and redundancy configuration of hybrid MMCs with DC fault blocking capability[J]Proceedings of the CSEE,2016,36(4):953-960.
[2]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.
[3]屠卿瑞,徐政,郑翔,等.一种优化的模块化多电平换流器电压均衡控制方法[J].电工技术学报,2011,26(5):15-20.Tu Qingrui,Xu Zheng,Zheng Xiang,et al.An optimized voltage balancing method for modular multilevel converter[J].Transactions of China Electrotechnical Society,2011,26(5):15-20.
[4]Candelaria J,Jae-Do P.VSC-HVDC system protection:a review of current methods[C]//IEEEPower Systems Conference and Exposition,Phoenix,AZ,2011:1-7.
[5]王姗姗,周孝信,汤广福,等.模块化多电平换流器HVDC直流双极短路子模块过电流分析[J].中国电机工程学报,2011,31(1):1-7.Wang Shanshan,Zhou Xiaoxin,Tang Guangfu,et al.Analysis of submodule overcurrent caused by DCpole-to-pole fault in modular multilevel converter HVDC[J].Proceedings of the CSEE,2011,31(1):1-7.
[6]Franck C M.HVDC circuit breakers:a review identifying future research needs[J].IEEE Transactions on Power Delivery,2011,26(2):998-1007.
[7]向往,林卫星,文劲宇,等.一种能够阻断直流故障电流的新型子模块拓扑及混合型模块化多电平换流器[J].中国电机工程学报,2014,34(29):5171-5179.Xiang Wang,Lin Weixing,Wen Jinyu,et al.A new topology of sub-modules with DC fault current blocking capability and a new type of hybrid MMC[J]Proceedings of the CSEE,2014,34(29):5171-5179.
[8]刘高任.基于模块化多电平换流器的柔性直流电网故障保护策略研究[D].杭州:浙江大学,2017.
[9]孔明,贺之渊,汤广福.子模块混合型MMC-HVDC直流故障穿越控制策略[J].中国电机工程学报,2014,34(30):5343-5351.Kong Ming,He Zhiyuan,Tang Guangfu.A DC fault ride-through strategy for cell-hybrid modular multilevel converter based HVDC transmission systems[J].Proceedings of the CSEE,2014,34(30):5343-5351.
[10]Lin Weixing,Jovcic D,Nguefeu S,et al.Full-bridge MMC converter optimal design to HVDC operational requirements[J].IEEE Transactions on Power Delivery,2016,31(3):1342-1350.
[11]李少华,王秀丽,李泰,等.混合式MMC及其直流故障穿越策略优化[J].中国电机工程学报,2016,36(7):1849-1858.Li Shaohua,Wang Xiuli,Li Tai,et al.Optimal design for hybrid MMC and its DC fault ride-through strategy[J].Proceedings of the CSEE,2016,36(7):1849-1858.
[12]Xiang Wang,Lin Weixing,Wen Jinyu,et al.Equivalent electromagnetic transient simulation model and fast recovery control of overhead VSC-HVDCbased on SB-MMC[J].IEEE Transactions on Power Delivery,2017,32(2):778-788.
[13]张峻榤,向往,林卫星,等.基于混合型MMC和直流开关的柔性直流电网直流故障保护研究[J].电力建设,2017,38(8):52-58.Zhang Junjie,Xiang Wang,Lin Weixing,et al.DCfault protection of VSC-HVDC grid based on hybrid MMC and DC switch[J].Electric Power Construction2017,38(8):52-58.
[14]Zeng Rong,Xu Lie,Yao Liangzhong,et al.Precharging and DC fault ride-through of hybrid MMC-based HVDC systems[J].IEEE Transactions on Power Delivery,2015,30(3):1298-1306.
[15]Chen C,Adam G P,Finney S,et al.H-bridge modular multi-level converter:control strategy for improved DC fault ride-through capability without converter blocking[J].IET Power Electronics,2015,8(10):1996-2008.
[16]Cui Shenghui,Sul S K.A comprehensive DCshort-circuit fault ride through strategy of hybrid modular multilevel converters(MMCs)for overhead line transmission[J].IEEE Transactions on Power Electronics,2016,31(11):7780-7796.
[17]罗永捷,李耀华,李子欣,等.全桥型MMC-HVDC直流短路故障穿越控制保护策略[J].中国电机工程学报,2016,36(7):1933-1943.Luo Yongjie,Li Yaohua,Li Zixin,et al.DC shortcircuit fault ride-through control strategy of fullbridge MMC-HVDC systems[J].Proceedings of the CSEE,2016,36(7):1933-1943.
[18]Lu Maozeng,Hu Jiabing,Lin Lei,et al.Zero DCvoltage ride through of a hybrid modular multilevel converter in HVDC systems[J].IET Renewable Power Generation,2017,11(1):35-43.
[19]冯谟可,郭裕群,许建中.混合型MMC启动策略及全桥子模块数目配置研究[J].华北电力大学学报(自然科学版),2017,44(6):28-35.Feng Moke,Guo Yuqun,Xu Jianzhong.Start-up control strategies of hybrid MMC and configuration of FBSM[J].Journal of North China Electric Power University(Natural Science Edition),2017,44(6):28-35.
[20]许建中,赵鹏豪,江伟,等.具备直流故障穿越能力的混合MMC可靠性分析和冗余配置方法[J].中国电机工程学报,2016,36(4):953-960.Xu Jianzhong,Zhao Penghao,Jiang Wei,et al Reliability analysis and redundancy configuration of hybrid MMCs with DC fault blocking capability[J]Proceedings of the CSEE,2016,36(4):953-960.