增强型柔性逆阻模块化多电平换流器的故障阻断特性分析
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摘要
鉴于传统半桥型模块化多电平换流器(HBSM-MMC)无法阻断直流故障电流的不足,通过对半桥子模块进行改造并增加桥臂阻尼模块(BDM),提出一种增强型柔性逆阻MMC(EFRB-MMC)拓扑,就其故障阻断特性展开详细研究。首先,分析EFRB-MMC的工作原理和故障阻断机理,推导故障电流和钳位电压解析式;然后,在故障阻断时间和器件电气应力研究基础上,进一步提出EFRB-MMC的关键参数设计原则;最后,仿真结果证明上述理论的有效性。
The traditional half-bridge sub-module based modular multilevel converter(HBSM-MMC) cannot block the DC fault current effectively. Thus an enhanced flexible reverse blocking MMC topology(EFRB-MMC) is proposed by improving the HBSMs and adding the bridge damping modules(BDMs). This paper focuses on its fault blocking performance analysis. Both operation principle and fault current limiting mechanism analysis of EFRB-MMC are carried out firstly,and the analytical formula of fault current and clamp voltage are further derived in detail. Moreover,based on the analysis of fault blocking time and device electrical stress, the design principles of key parameters of EFRB-MMC are further proposed. Finally, the simulation results show the effectiveness of the proposed topology.
The traditional half-bridge sub-module based modular multilevel converter(HBSM-MMC) cannot block the DC fault current effectively. Thus an enhanced flexible reverse blocking MMC topology(EFRB-MMC) is proposed by improving the HBSMs and adding the bridge damping modules(BDMs). This paper focuses on its fault blocking performance analysis. Both operation principle and fault current limiting mechanism analysis of EFRB-MMC are carried out firstly,and the analytical formula of fault current and clamp voltage are further derived in detail. Moreover,based on the analysis of fault blocking time and device electrical stress, the design principles of key parameters of EFRB-MMC are further proposed. Finally, the simulation results show the effectiveness of the proposed topology.
引文
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[11]陈继开,孙川,李国庆,等.双极MMC-HVDC系统直流故障特性研究[J].电工技术学报,2017,32(10):53-60.Chen Jikai,Sun Chuan,Li Guoqing,et al.Study on characteristics of DC fault in bipolar MMC-HVDCsystem[J].Transactions of China Electrotechnical Society,2017,32(10):53-60.
[12]李笑倩,刘文华,宋强,等.一种具备直流清除能力的MMC换流器改进拓扑[J].中国电机工程学报,2014,34(36):6389-6397.Li Xiaoqian,Liu Wenhua,Song Qiang,et al.An enhanced MMC topology with DC fault clearance capability[J].Proceedings of the CSEE,2014,34(36):6389-6397.
[13]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.Anovel modular multilevel converter with DC fault current limiting capability[J].Transactions of China Electrotechnical Society,2017,32(6):172-180.
[14]Liu Gaoren,Xu Feng,Xu Zheng,et al.Assembly HVDC breaker for HVDC grids with modular multilevel converters[J].IEEE Transactions on Power Electronics,2017,32(2):931-941.
[15]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 DC poleto-pole fault in modular multilevel converter HVDCsystem[J].Proceedings of the CSEE,2011,31(1):1-7.
[16]Leterme Willem,Beerten Jef,Hertem Dirk Van.Equivalent circuit for half-bridge MMC DC fault current contribution[C]//IEEE International Energy Conference(ENERGYCON),Belgium,2016:1-6.
[17]赵成勇,许建中,李探.全桥型MMC-MTDC直流故障穿越能力分析[J].中国科学:技术科学,2013,56(1):106-114.Zhao Chengyong,Xu Jianzhong,Li Tan.DC faults ride-through capability analysis of full-bridge MMC-MTDC system[J].Science China:Technological Sciences,2013,56(1):106-114.
[18]Xue Yinglin,Xu Zheng.On the bipolar MMC-HVDCtopology suitable for bulk power overhead line transmission:configuration,control,and DC fault analysis[J].IEEE Transactions on Power Delivery2014,29(6):2420-2429.
[19]薛英林,徐政.适用于架空线路输电的新型双极MMC-HVDC拓扑[J].高电压技术,2013,39(2):481-487.Xue Yinglin,Xu Zheng.New breed of bipolar MMC-HVDC topology for overhead line transmission[J]High Voltage Technology,2013,39(2):481-487.
[20]Li Xiaoqian,Liu Wenhua,Song Qiang,et al.An enhanced MMC topology with DC fault ride-through capability[C]//IEEE International Conference on Industrial Electronics Society,Vienna,Austria,2013:6182-6188.
[21]张建坡,赵成勇,孙海峰.基于改进拓扑的MMC-HVDC控制策略仿真[J].中国电机工程学报,2015,35(5):1032-1040.Zhang Jianpo,Zhao Chengyong,Sun Haifeng.Simulations of control strategies in MMC-HVDCwith an improved topology[J].Proceedings of the CSEE,2015,35(5):1032-1040.
[22]杨晓峰,薛尧,陈博伟,等.具有直流故障阻断能力的逆阻型模块化多电平换流器[J].中国电机工程学报,2017,37(4):1177-1187.Yang Xiaofeng,Xue Yao,Chen Bowei,et al.Reverse blocking modular multilevel converter with DC fault blocking capability[J].Proceedings of the CSEE2017,37(4):1177-1187.
[23]李斌,何佳伟.多端柔性直流电网故障隔离技术研究[J].中国电机工程学报,2016,36(1):87-95.Li Bin,He Jiawei.Research on the DC fault isolating technique in multi-terminal DC system[J].Proceedings of the CSEE,2016,36(1):87-95.
[2]徐政,薛英林,张哲任.大容量架空线柔性直流输电关键技术及前景展望[J].中国电机工程学报,2014,34(29):5051-5062.Xu Zheng,Xue Yinglin,Zhang Zheren.VSC-HVDCtechnology suitable for bulk power overhead line transmission[J].Proceedings of the CSEE,2014,34(29):5051-5062.
[3]Lesnicar A,Marquardt R.An innovative modular multilevel converter topology suitable for a wide power range[C]//IEEE Power Technology Conference Proceedings,Bologna,Italy,2003:1-6.
[4]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.
[5]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 Electrotechnical Society,2015,30(17):1-12.
[6]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.
[7]孙栩,曹士冬,卜广全,等.架空线柔性直流电网构建方案[J].电网技术,2016,40(3):678-682.Sun Xu,Cao Shidong,Bu Guangquan,et al.Construction scheme of overhead line flexible HVDC grid[J]Power System Technology,2016,40(3):678-682.
[8]杨用春,肖湘宁,郭世枭,等.基于模块化多电平变流器的统一电能质量调节器工程实验装置研究[J].电工技术学报,2018,33(16):3743-3755.Yang Yongchun,Xiao Xiangning,Guo Shixiao,et al.Research of unified power quality conditioner engineering experiment device based on modular multilevel converter[J].Transactions of China Electrotechnical Society,2018,33(16):3743-3755.
[9]李亚男,蒋维勇,余世峰,等.舟山多端柔性直流输电工程系统设计[J].高电压技术,2014,40(8):2490-2496.Li Yanan,Jiang Weiyong,Yu Shifeng,et al.System design of Zhoushan multi-terminal VSC-HVDCtransmission project[J].High Voltage Technology,2014,40(8):2490-2496.
[10]Cui Shenghui,Sul Seung-Ki.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.
[11]陈继开,孙川,李国庆,等.双极MMC-HVDC系统直流故障特性研究[J].电工技术学报,2017,32(10):53-60.Chen Jikai,Sun Chuan,Li Guoqing,et al.Study on characteristics of DC fault in bipolar MMC-HVDCsystem[J].Transactions of China Electrotechnical Society,2017,32(10):53-60.
[12]李笑倩,刘文华,宋强,等.一种具备直流清除能力的MMC换流器改进拓扑[J].中国电机工程学报,2014,34(36):6389-6397.Li Xiaoqian,Liu Wenhua,Song Qiang,et al.An enhanced MMC topology with DC fault clearance capability[J].Proceedings of the CSEE,2014,34(36):6389-6397.
[13]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.Anovel modular multilevel converter with DC fault current limiting capability[J].Transactions of China Electrotechnical Society,2017,32(6):172-180.
[14]Liu Gaoren,Xu Feng,Xu Zheng,et al.Assembly HVDC breaker for HVDC grids with modular multilevel converters[J].IEEE Transactions on Power Electronics,2017,32(2):931-941.
[15]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 DC poleto-pole fault in modular multilevel converter HVDCsystem[J].Proceedings of the CSEE,2011,31(1):1-7.
[16]Leterme Willem,Beerten Jef,Hertem Dirk Van.Equivalent circuit for half-bridge MMC DC fault current contribution[C]//IEEE International Energy Conference(ENERGYCON),Belgium,2016:1-6.
[17]赵成勇,许建中,李探.全桥型MMC-MTDC直流故障穿越能力分析[J].中国科学:技术科学,2013,56(1):106-114.Zhao Chengyong,Xu Jianzhong,Li Tan.DC faults ride-through capability analysis of full-bridge MMC-MTDC system[J].Science China:Technological Sciences,2013,56(1):106-114.
[18]Xue Yinglin,Xu Zheng.On the bipolar MMC-HVDCtopology suitable for bulk power overhead line transmission:configuration,control,and DC fault analysis[J].IEEE Transactions on Power Delivery2014,29(6):2420-2429.
[19]薛英林,徐政.适用于架空线路输电的新型双极MMC-HVDC拓扑[J].高电压技术,2013,39(2):481-487.Xue Yinglin,Xu Zheng.New breed of bipolar MMC-HVDC topology for overhead line transmission[J]High Voltage Technology,2013,39(2):481-487.
[20]Li Xiaoqian,Liu Wenhua,Song Qiang,et al.An enhanced MMC topology with DC fault ride-through capability[C]//IEEE International Conference on Industrial Electronics Society,Vienna,Austria,2013:6182-6188.
[21]张建坡,赵成勇,孙海峰.基于改进拓扑的MMC-HVDC控制策略仿真[J].中国电机工程学报,2015,35(5):1032-1040.Zhang Jianpo,Zhao Chengyong,Sun Haifeng.Simulations of control strategies in MMC-HVDCwith an improved topology[J].Proceedings of the CSEE,2015,35(5):1032-1040.
[22]杨晓峰,薛尧,陈博伟,等.具有直流故障阻断能力的逆阻型模块化多电平换流器[J].中国电机工程学报,2017,37(4):1177-1187.Yang Xiaofeng,Xue Yao,Chen Bowei,et al.Reverse blocking modular multilevel converter with DC fault blocking capability[J].Proceedings of the CSEE2017,37(4):1177-1187.
[23]李斌,何佳伟.多端柔性直流电网故障隔离技术研究[J].中国电机工程学报,2016,36(1):87-95.Li Bin,He Jiawei.Research on the DC fault isolating technique in multi-terminal DC system[J].Proceedings of the CSEE,2016,36(1):87-95.
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