模块化多电平变流器子模块电压分组检测中过电压防护策略
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摘要
针对模块化多电平变流器(MMC)子模块电压分组检测引起的过电压问题,对子模块过电压防护策略进行研究。首先,指出子模块电压不能实时直接测量是过电压出现的原因;接着,研究负载接入运行前对子模块电压进行预检测的必要性;然后,提出负载接入运行过程中的子模块过电压检测及预防策略,最后,在Matlab/Simulink环境下搭建31电平单相MMC仿真模型进行仿真验证并在九电平单相实验平台上进行实验验证。仿真和实验结果表明,本文提出的过电压防护策略在电容参数一致和存在参数偏移时均能取得良好的过电压防护效果,具有很强的参数适应性。
For the over-voltage problem in sub-module of modular multilevel converter(MMC)with reduced sensors, this paper proposes a sub-module over-voltage protection strategy. First of all, it is pointed out that the sub-module voltage not being directly measured in real-time is the cause of over-voltage. Then, the necessity of pre-detection of sub-module voltage before load access operation is studied. The sub-module over-voltage detection and prevention strategy during load access operation are proposed. Finally, case studies are performed on a 31-level single-phase MMC in Matlab/Simulink.Meanwhile, a 9-level single-phase MMC laboratory prototype is built to verify the effectiveness of this strategy. The simulation and experimental results show that the over-voltage protection strategy proposed in this paper can achieve good overvoltage protection effect when the capacitance parameters are consistent and deviated, and has strong parameter adaptability.
For the over-voltage problem in sub-module of modular multilevel converter(MMC)with reduced sensors, this paper proposes a sub-module over-voltage protection strategy. First of all, it is pointed out that the sub-module voltage not being directly measured in real-time is the cause of over-voltage. Then, the necessity of pre-detection of sub-module voltage before load access operation is studied. The sub-module over-voltage detection and prevention strategy during load access operation are proposed. Finally, case studies are performed on a 31-level single-phase MMC in Matlab/Simulink.Meanwhile, a 9-level single-phase MMC laboratory prototype is built to verify the effectiveness of this strategy. The simulation and experimental results show that the over-voltage protection strategy proposed in this paper can achieve good overvoltage protection effect when the capacitance parameters are consistent and deviated, and has strong parameter adaptability.
引文
[1]蒋冠前,李志勇,杨慧霞,等.柔性直流输电系统拓扑结构研究综述[J].电力系统保护与控制,2015,43(15):145-153.Jiang Guanqian,Li Zhiyong,Yang Huixia,et al Research review on topological structure of flexible HVDC system[J].Power System Protection and Control,2015,43(15):145-153.
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[10]彭也伦,黄守道,张文娟,等.一种基于电流滞环控制的模块化多电平变流器调制策略[J].电工技术学报,2016,31(17):94-101.Peng Yelun,Huang Shoudao,Zhang Wenjuan,et al.Modulation method based on current hysteresis correct for modular multilevel converter[J].Transactions of China Electrotechnical Society,201631(17):94-101.
[11]Mei Jun,Shen Ke,Xiao Bailu,et al.A new selective loop bias mapping phase disposition PWM with dynamic voltage balance capability for modular multilevel converter[J].IEEE Transactions on Industrial Electronics,2014,61(2):798-807.
[12]Elserougi A,Daoud M I,Massoud A M,et al.Investigation of sensorless capacitor voltage balancing technique for modular multilevel converters[C]//40th Annual Conference of the IEEE Industrial Electronics Society(IECON),Dallas,TX,USA,2014:1569-1574.
[13]Ahmed A Elserougi,Ahmed M Massoud,Shehab Ahmed.Modular multilevel converter-based bipolar high-voltage pulse generator with sensorless capacitor voltage balancing technique[J].IEEETransactions on Plasma Science,2016,44(7):1187-1194.
[14]荣飞,陈盼庆,黄守道,等.一种减少电压互感器的模块化多电平换流器分组控制策略[J].电工技术学报,2017,32(18):186-195.Rong Fei,Chen Panqing,Huang Shoudao,et al.Sub-module grouping strategy for reducing the number of voltage sensors in modular multilevel converters[J].Transactions of China Electrotechnical Society,2017,32(18):186-195.
[15]Vahid Najmi,Hamed Nademi,Rolando Burgos.An adaptive backstepping observer for modular multilevel converter[C]//Energy Conversion Congress and Exposition(ECCE),Pittsburgh,PA,USA,2014:2115-2120.
[16]Hamed Nademi,Anandarup Das,Lars E Norum.Modular multilevel converter with an adaptive observer of capacitor voltages[J].IEEE Transactions on Power Electronics,2015,30(1):235-248.
[17]Jae-Jung Jung,Hak-Jun Lee,Jung-Ik Ha,et al.Reduced sampling rate for cell voltage sensing in high-level modular multilevel converter[C]//IEEEInternational Conference on Industrial Technology(ICIT),Busan,South Korea,2014:336-341.
[18]Osama Abushafa,Shady Gadoue,Mohamed Dhaidah,et al.Capacitor voltage estimation in modular multilevel converters using a Kalman filter algorithm[C]//IEEE International Conference on Industrial Technology(ICIT),Seville,Spain,2015:3016-3021.
[19]Arco S D’,Suul J A.Estimation of sub-module capacitor voltages in modular multilevel converters[C]//European Conference on Power Electronics ans Applications(EPE),Lille,2013:1-10.
[20]Picas R,Zaragoza J,Pou J,et al.New measuring technique for reducing the number od voltage sensors in modular multilevel converters[J].IEEE Transactions Power Electronics,2015,31(1):177-187.
[21]Rong Fei,Gong Xichang,Li Xing,et al.A new voltage measure method for MMC based on sample delay compensation[J].IEEE Transactions Power Electronics,2018,33(7):5712-5723.
[22]刘波峰,候维杨,李诚明.MMC子模块电容电压检测新方法[J].电子测量与仪器学报,2017,31(7):1137-1143.Liu Bofeng,Hou Weiyang,Li Chengming.A new sub-module voltage measuring technique in modular multilevel converters[J].Journal of Electronic Measurement and Instrumentation,2017,31(7):1137-1143.
[23]冯亚东,汪涛,卢宇,等.模块化多电平柔性直流换流器阀组本体保护的设计[J].电力系统自动化,2015,39(11):64-68.Feng Yadong,Wang Tao,Lu Yu,et al.Valve protection design of modular multilevel converter for VSC-HVDC[J].Automation of Electric Power Systems,2015,39(11):64-68.
[2]Dekka A,Wu B,Fuentes R L,et al.Evolution of topologies,modeling,control schemes,and applications of modular multilevel converters[J].IEEEJournal of Emerging and Selected Topics in Power Electronics,2017,5(4):1631-1656.
[3]祝贺,王久和,郑成才,等.五电平MMC-UPQC的无源控制[J].电工技术学报,2017,32(增刊2):172-178.Zhu He,Wang Jiuhe,Zheng Chengcai,et al.Passivity based control of five-level MMC-UPQC[J].Transactions of China Electrotechnical Society,2017,32(S2):172-178.
[4]徐殿国,李彬彬,周少泽.模块化多电平高压变频技术研究综述[J].电工技术学报,2017,32(20):104-116.Xu Dianguo,Li Binbin,Zhou Shaoze.Overview of the modular multilevel converter based high voltage motor drive[J].Transactions of China Electrotechnical Society,2017,32(20):104-116.
[5]刘波峰,贺锐智,黄守道.低频工况下MMC电容电压波动抑制研究[J].控制工程,2017,24(8):1553-1558.Liu Bofeng,He Ruizhi,Huang Shoudao.Study of capacitor voltage suppressing for MMC at low frequency[J].Control Engineering of China,2017,24(8):1553-1558.
[6]Knaak H J,Modular multilevel converters and HVDC/FACTS:a success story[C]//Proceedings of the 14th European Conference on Power Electronics and Applications,Birmingham,UK,2011:1-6.
[7]李岩,罗雨,许树楷,等.柔性直流输电技术:应用、进步期望[J].南方电网技术,2015,9(1):7-13.Li Yan,Luo Yu,Xu Shukai,et al.VSC-HVDCtransmission technology:application,advancement and exception[J].Southern Power System Technology,2015,9(1):7-13.
[8]郭家虎,顾先明,李鹏鹏.大功率MMC换流站最近电平调制策略研究[J].电气应用,2015,34(3):44-47.
[9]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.
[10]彭也伦,黄守道,张文娟,等.一种基于电流滞环控制的模块化多电平变流器调制策略[J].电工技术学报,2016,31(17):94-101.Peng Yelun,Huang Shoudao,Zhang Wenjuan,et al.Modulation method based on current hysteresis correct for modular multilevel converter[J].Transactions of China Electrotechnical Society,201631(17):94-101.
[11]Mei Jun,Shen Ke,Xiao Bailu,et al.A new selective loop bias mapping phase disposition PWM with dynamic voltage balance capability for modular multilevel converter[J].IEEE Transactions on Industrial Electronics,2014,61(2):798-807.
[12]Elserougi A,Daoud M I,Massoud A M,et al.Investigation of sensorless capacitor voltage balancing technique for modular multilevel converters[C]//40th Annual Conference of the IEEE Industrial Electronics Society(IECON),Dallas,TX,USA,2014:1569-1574.
[13]Ahmed A Elserougi,Ahmed M Massoud,Shehab Ahmed.Modular multilevel converter-based bipolar high-voltage pulse generator with sensorless capacitor voltage balancing technique[J].IEEETransactions on Plasma Science,2016,44(7):1187-1194.
[14]荣飞,陈盼庆,黄守道,等.一种减少电压互感器的模块化多电平换流器分组控制策略[J].电工技术学报,2017,32(18):186-195.Rong Fei,Chen Panqing,Huang Shoudao,et al.Sub-module grouping strategy for reducing the number of voltage sensors in modular multilevel converters[J].Transactions of China Electrotechnical Society,2017,32(18):186-195.
[15]Vahid Najmi,Hamed Nademi,Rolando Burgos.An adaptive backstepping observer for modular multilevel converter[C]//Energy Conversion Congress and Exposition(ECCE),Pittsburgh,PA,USA,2014:2115-2120.
[16]Hamed Nademi,Anandarup Das,Lars E Norum.Modular multilevel converter with an adaptive observer of capacitor voltages[J].IEEE Transactions on Power Electronics,2015,30(1):235-248.
[17]Jae-Jung Jung,Hak-Jun Lee,Jung-Ik Ha,et al.Reduced sampling rate for cell voltage sensing in high-level modular multilevel converter[C]//IEEEInternational Conference on Industrial Technology(ICIT),Busan,South Korea,2014:336-341.
[18]Osama Abushafa,Shady Gadoue,Mohamed Dhaidah,et al.Capacitor voltage estimation in modular multilevel converters using a Kalman filter algorithm[C]//IEEE International Conference on Industrial Technology(ICIT),Seville,Spain,2015:3016-3021.
[19]Arco S D’,Suul J A.Estimation of sub-module capacitor voltages in modular multilevel converters[C]//European Conference on Power Electronics ans Applications(EPE),Lille,2013:1-10.
[20]Picas R,Zaragoza J,Pou J,et al.New measuring technique for reducing the number od voltage sensors in modular multilevel converters[J].IEEE Transactions Power Electronics,2015,31(1):177-187.
[21]Rong Fei,Gong Xichang,Li Xing,et al.A new voltage measure method for MMC based on sample delay compensation[J].IEEE Transactions Power Electronics,2018,33(7):5712-5723.
[22]刘波峰,候维杨,李诚明.MMC子模块电容电压检测新方法[J].电子测量与仪器学报,2017,31(7):1137-1143.Liu Bofeng,Hou Weiyang,Li Chengming.A new sub-module voltage measuring technique in modular multilevel converters[J].Journal of Electronic Measurement and Instrumentation,2017,31(7):1137-1143.
[23]冯亚东,汪涛,卢宇,等.模块化多电平柔性直流换流器阀组本体保护的设计[J].电力系统自动化,2015,39(11):64-68.Feng Yadong,Wang Tao,Lu Yu,et al.Valve protection design of modular multilevel converter for VSC-HVDC[J].Automation of Electric Power Systems,2015,39(11):64-68.