嵌套式中点可控型五电平变换器新型空间电压矢量调制策略
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摘要
针对嵌套式中点可控型(nested neutral point piloted,NNPP)五电平变换器电容电压平衡问题,提出一种基于gh坐标系的五电平NNPP变换器新型空间电压矢量脉宽调制(space vector pulse width modulation,SVPWM)算法。同时,给出悬浮电容电压平衡和直流侧中点电压平衡控制策略。通过选取各相输出电平对应的冗余开关组合,实现悬浮电容电压平衡。根据中点电压波动模型,提出一种基于开关序列优化(switching sequence optimization,SSO)的中点电压平衡控制策略。采用五段式开关序列设计,建立目标函数,根据中点电压偏差,对开关序列进行动态选择,选取最优开关序列。最后搭建了五电平NNPP变换器实验样机,稳态和动态实验结果验证了所提新型SVPWM算法和电容电压平衡控制策略的有效性。
In order to solve the capacitor voltage balance problems for five-level nested neutral point piloted(NNPP) converter, a novel space vector pulse width modulation(SVPWM) algorithm based on gh coordinate for five-level NNPP converter was presented. Meanwhile, the floating-capacitor voltage balance control strategy and neutral-point voltage balance control strategy were proposed. Floating-capacitor voltages were balanced by selecting the appropriate switch combinations corresponding to the output voltage level for each phase. Moreover,according to the fluctuation model of neutral-point voltage, the neutral-point voltage balance control based on switching sequence optimization(SSO) was proposed. The five-segment switching sequence design was used and the cost function was established. The optimal switching sequence was dynamically selected according to the neutral-point voltage deviation. Finally, the five-level NNPP converter experimental prototype was built. The steady-state and dynamic experimental results verify the correctness of the proposed SVPWM algorithm with the capacitor voltage balance control strategies.
In order to solve the capacitor voltage balance problems for five-level nested neutral point piloted(NNPP) converter, a novel space vector pulse width modulation(SVPWM) algorithm based on gh coordinate for five-level NNPP converter was presented. Meanwhile, the floating-capacitor voltage balance control strategy and neutral-point voltage balance control strategy were proposed. Floating-capacitor voltages were balanced by selecting the appropriate switch combinations corresponding to the output voltage level for each phase. Moreover,according to the fluctuation model of neutral-point voltage, the neutral-point voltage balance control based on switching sequence optimization(SSO) was proposed. The five-segment switching sequence design was used and the cost function was established. The optimal switching sequence was dynamically selected according to the neutral-point voltage deviation. Finally, the five-level NNPP converter experimental prototype was built. The steady-state and dynamic experimental results verify the correctness of the proposed SVPWM algorithm with the capacitor voltage balance control strategies.
引文
[1]曾正,赵荣祥,汤胜清,等.可再生能源分散接入用先进并网逆变器研究综述[J].中国电机工程学报,2013,33(24):1-12.Zeng Zheng,Zhao Rongxiang,Tang Shengqing,et al.An overview on advanced grid connected inverters used for decentralized renewable energy resources[J].Proceedings of the CSEE,2013,33(24):1-12(in Chinese).
[2]Li Wuhua,Gu Yujie,Luo Haoze,et al.Topology review and derivation methodology of single-phase transformerless photovoltaic inverters for leakage current suppression[J].IEEE Transactions on Industrial Electronics,2015,62(7):4537-4551.
[3]姜建国,乔树通,郜登科.电力电子装置在电力系统中的应用[J].电力系统自动化,2014,38(3):2-6.Jiang Jianguo,Qiao Shutong,Gao Dengke.Application of power electronic equipment in power system[J].Automation of Electric Power Systems,2014,38(3):2-6(in Chinese).
[4]Kouro K,Malinowski M,Gopakumar K,et al.Recent advances and industrial applications of multilevel converters[J].IEEE Transactions on Industrial Electronics,2010,57(8):2553-2580.
[5]Rodriguez J,Bernet S,Steimer P K,et al.A survey on neutral-point-clamped inverters[J].IEEE Transactions on Industrial Electronics,2010,57(7):2219-2230.
[6]陈仲,许亚明,那显龙.基于中点电流的三电平NPC逆变器电容电压均衡控制分析[J].中国电机工程学报,2016,36(19):5308-5317.Chen Zhong,Xu Yaming,Na Xianlong.Analysis of a new voltage balance method for three-level NPC inverters based on neutral-point current[J].Proceedings of the CSEE,2016,36(19):5308-5317(in Chinese).
[7]Saeedifard M,Iravani R,Pou J.Analysis and control of DC-capacitor-voltage-drift phenomenon of a passive front-end five-level converter[J].IEEE Transactions on Industrial Electronics,2007,54(6):3255-3266.
[8]Thielemans S,Ruderman A,Reznikov B,et al.Improved natural balancing with modified phase-shifted PWM for single-leg five-level flying-capacitor converters[J].IEEE Transactions on Power Electronics,2012,27(4):1658-1667.
[9]王超,何英杰,刘云峰,等.飞跨电容型多电平逆变器空间矢量与载波脉宽调制统一理论研究[J].中国电机工程学报,2016,36(15):4172-4183.Wang Chao,He Yingjie,Liu Yunfeng,et al.Research of the unity theory between the space vector and the carrier-based PWM modulation strategies in flying capacitor multilevel inverters[J].Proceedings of the CSEE,2016,36(15):4172-4183(in Chinese).
[10]孙宜峰,阮新波.级联型多电平逆变器的功率均衡控制策略[J].中国电机工程学报,2006,26(4):126-133.Sun Yifeng,Ruan Xinbo.Power balance control schemes for cascaded multilevel inverters[J].Proceedings of the CSEE,2006,26(4):126-133(in Chinese).
[11]张颖,李崇坚,朱春毅,等.三电平H桥级联型逆变器[J].电工技术学报,2011,26(5):78-82.Zhang Ying,Li Chongjian,Zhu Chunyi,et a1.Three-level H-bridge cascade type multi-level inverter[J].Transactions of China Electrotechnical Society,2011,26(5):78-82(in Chinese).
[12]Wang Kui,Xu Lie,Zheng Zedong,et al.Capacitor voltage balancing of a Five-Level ANPC converter using Phase-Shifted PWM[J].IEEE Transactions on Power Electronics,2015,30(3):1147-1156.
[13]刘战,谭国俊,李浩,等.基于空间电压矢量的有源中点箝位型五电平逆变器母线中点电压平衡问题的研究[J].中国电机工程学报,2015,35(24):6499-6507.Liu Zhan,Tan Guojun,Li Hao,et al.Research on neutral-point potential balancing problems of active neutral-point-clamped five-level inverter based on space vector pulse width modulation[J].Proceedings of the CSEE,2015,35(24):6499-6507(in Chinese).
[14]赵昕,赵成勇,李广凯,等.采用载波移相技术的模块化多电平换流器电容电压平衡控制[J].中国电机工程学报,2011,31(21):48-55.Zhao Xin,Zhao Chengyong,Li Guangkai,et al.Submodule capacitance voltage balancing of modular multilevel converter based on carrier phase shifted SPWM technique[J].Proceedings of the CSEE,2011,31(21):48-55(in Chinese).
[15]Debnath S,Qin J C,Bahrani B,et al.Operation,control,and applications of the modular multilevel converter:A review[J].IEEE Transactions on Power Electronics,2015,30(1):37-53.
[16]Narimani M,Wu B,Cheng Z Y,et al.A new nested neutral point clamped(NNPC)converter for mediumvoltage(MV)power conversion[J].IEEE Transactions on Power Electronics,2014,29(12):6375-6382.
[17]Narimani M,Wu B,Zargari N.A novel five-level voltage source inverter with sinusoidal pulse width modulator for medium-voltage applications[J].IEEE Transactions on Power Electronics,2016,31(3):1959-1967.
[18]Gateau G,Meynard T A,Foch H.Stacked multicell converter(SMC):Properties and design[C]//Proceedings of2001 IEEE 32nd Annual Power Electronics Specialists Conference.Vancouver,Canada:IEEE,2001:1583-1588.
[19]Meynard T A,Foch H,Forest F,et al.Multicell converters:Derived topologies[J].IEEE Transactions on Industrial Electronics,2002,49(5):978-987.
[20]Ben Smida M and Ben Ammar F.Modeling and DBC-PSC-PWM control of a three-phase flying-capacitor stacked multilevel voltage source inverter[J].IEEE Transactions on Industrial Electronics,2010,57(7):2231-2239.
[21]Ghias A M Y M,Pou J,Agelidis V G.Voltage balancing method for stacked multicell converters using phasedisposition PWM[J].IEEE Transactions on Industrial Electronics,2015,62(7):4001-4010.
[22]Ghias A M Y M,Pou J,Agelidis V G.An active voltage-balancing method based on phase-shifted PWM for stacked multicell converters[J].IEEE Transactions on Power Electronics,2016,31(3):1921-1930.
[23]Schweizer M,Kolar J W.Design and implementation of a highly efficient three-level t-type converter for lowvoltage application[J].IEEE Transactions on Power Electronics,2013,28(2):1504-1511.
[24]Guennegues V,Gollentz B,Meibody-Tabar F,et al.A converter topology for high speed motor drive applications[C]//Proceedings of 2009 13th European Conference on Power Electronics and Applications.Barcelona,Spain:IEEE,2009:1-8.
[25]赵辉,李瑞,王红君,等.60°坐标系下三电平逆变器SVPWM方法的研究[J].中国电机工程学报,2008,28(24):39-45.Zhao Hui,Li Rui,Wang Hongjun,et al.Study on SVPWM method based on 60°coordinate system for three-level inverter[J].Proceedings of the CSEE,2008,28(24):39-45(in Chinese).
[2]Li Wuhua,Gu Yujie,Luo Haoze,et al.Topology review and derivation methodology of single-phase transformerless photovoltaic inverters for leakage current suppression[J].IEEE Transactions on Industrial Electronics,2015,62(7):4537-4551.
[3]姜建国,乔树通,郜登科.电力电子装置在电力系统中的应用[J].电力系统自动化,2014,38(3):2-6.Jiang Jianguo,Qiao Shutong,Gao Dengke.Application of power electronic equipment in power system[J].Automation of Electric Power Systems,2014,38(3):2-6(in Chinese).
[4]Kouro K,Malinowski M,Gopakumar K,et al.Recent advances and industrial applications of multilevel converters[J].IEEE Transactions on Industrial Electronics,2010,57(8):2553-2580.
[5]Rodriguez J,Bernet S,Steimer P K,et al.A survey on neutral-point-clamped inverters[J].IEEE Transactions on Industrial Electronics,2010,57(7):2219-2230.
[6]陈仲,许亚明,那显龙.基于中点电流的三电平NPC逆变器电容电压均衡控制分析[J].中国电机工程学报,2016,36(19):5308-5317.Chen Zhong,Xu Yaming,Na Xianlong.Analysis of a new voltage balance method for three-level NPC inverters based on neutral-point current[J].Proceedings of the CSEE,2016,36(19):5308-5317(in Chinese).
[7]Saeedifard M,Iravani R,Pou J.Analysis and control of DC-capacitor-voltage-drift phenomenon of a passive front-end five-level converter[J].IEEE Transactions on Industrial Electronics,2007,54(6):3255-3266.
[8]Thielemans S,Ruderman A,Reznikov B,et al.Improved natural balancing with modified phase-shifted PWM for single-leg five-level flying-capacitor converters[J].IEEE Transactions on Power Electronics,2012,27(4):1658-1667.
[9]王超,何英杰,刘云峰,等.飞跨电容型多电平逆变器空间矢量与载波脉宽调制统一理论研究[J].中国电机工程学报,2016,36(15):4172-4183.Wang Chao,He Yingjie,Liu Yunfeng,et al.Research of the unity theory between the space vector and the carrier-based PWM modulation strategies in flying capacitor multilevel inverters[J].Proceedings of the CSEE,2016,36(15):4172-4183(in Chinese).
[10]孙宜峰,阮新波.级联型多电平逆变器的功率均衡控制策略[J].中国电机工程学报,2006,26(4):126-133.Sun Yifeng,Ruan Xinbo.Power balance control schemes for cascaded multilevel inverters[J].Proceedings of the CSEE,2006,26(4):126-133(in Chinese).
[11]张颖,李崇坚,朱春毅,等.三电平H桥级联型逆变器[J].电工技术学报,2011,26(5):78-82.Zhang Ying,Li Chongjian,Zhu Chunyi,et a1.Three-level H-bridge cascade type multi-level inverter[J].Transactions of China Electrotechnical Society,2011,26(5):78-82(in Chinese).
[12]Wang Kui,Xu Lie,Zheng Zedong,et al.Capacitor voltage balancing of a Five-Level ANPC converter using Phase-Shifted PWM[J].IEEE Transactions on Power Electronics,2015,30(3):1147-1156.
[13]刘战,谭国俊,李浩,等.基于空间电压矢量的有源中点箝位型五电平逆变器母线中点电压平衡问题的研究[J].中国电机工程学报,2015,35(24):6499-6507.Liu Zhan,Tan Guojun,Li Hao,et al.Research on neutral-point potential balancing problems of active neutral-point-clamped five-level inverter based on space vector pulse width modulation[J].Proceedings of the CSEE,2015,35(24):6499-6507(in Chinese).
[14]赵昕,赵成勇,李广凯,等.采用载波移相技术的模块化多电平换流器电容电压平衡控制[J].中国电机工程学报,2011,31(21):48-55.Zhao Xin,Zhao Chengyong,Li Guangkai,et al.Submodule capacitance voltage balancing of modular multilevel converter based on carrier phase shifted SPWM technique[J].Proceedings of the CSEE,2011,31(21):48-55(in Chinese).
[15]Debnath S,Qin J C,Bahrani B,et al.Operation,control,and applications of the modular multilevel converter:A review[J].IEEE Transactions on Power Electronics,2015,30(1):37-53.
[16]Narimani M,Wu B,Cheng Z Y,et al.A new nested neutral point clamped(NNPC)converter for mediumvoltage(MV)power conversion[J].IEEE Transactions on Power Electronics,2014,29(12):6375-6382.
[17]Narimani M,Wu B,Zargari N.A novel five-level voltage source inverter with sinusoidal pulse width modulator for medium-voltage applications[J].IEEE Transactions on Power Electronics,2016,31(3):1959-1967.
[18]Gateau G,Meynard T A,Foch H.Stacked multicell converter(SMC):Properties and design[C]//Proceedings of2001 IEEE 32nd Annual Power Electronics Specialists Conference.Vancouver,Canada:IEEE,2001:1583-1588.
[19]Meynard T A,Foch H,Forest F,et al.Multicell converters:Derived topologies[J].IEEE Transactions on Industrial Electronics,2002,49(5):978-987.
[20]Ben Smida M and Ben Ammar F.Modeling and DBC-PSC-PWM control of a three-phase flying-capacitor stacked multilevel voltage source inverter[J].IEEE Transactions on Industrial Electronics,2010,57(7):2231-2239.
[21]Ghias A M Y M,Pou J,Agelidis V G.Voltage balancing method for stacked multicell converters using phasedisposition PWM[J].IEEE Transactions on Industrial Electronics,2015,62(7):4001-4010.
[22]Ghias A M Y M,Pou J,Agelidis V G.An active voltage-balancing method based on phase-shifted PWM for stacked multicell converters[J].IEEE Transactions on Power Electronics,2016,31(3):1921-1930.
[23]Schweizer M,Kolar J W.Design and implementation of a highly efficient three-level t-type converter for lowvoltage application[J].IEEE Transactions on Power Electronics,2013,28(2):1504-1511.
[24]Guennegues V,Gollentz B,Meibody-Tabar F,et al.A converter topology for high speed motor drive applications[C]//Proceedings of 2009 13th European Conference on Power Electronics and Applications.Barcelona,Spain:IEEE,2009:1-8.
[25]赵辉,李瑞,王红君,等.60°坐标系下三电平逆变器SVPWM方法的研究[J].中国电机工程学报,2008,28(24):39-45.Zhao Hui,Li Rui,Wang Hongjun,et al.Study on SVPWM method based on 60°coordinate system for three-level inverter[J].Proceedings of the CSEE,2008,28(24):39-45(in Chinese).