一种新型七电平有源中点钳位型逆变器的拓扑结构及其换流策略
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摘要
有源中点钳位型(active neutral-point-clamped,ANPC)多电平逆变器是一种新型的多电平逆变器。该文分析普通七电平有源中点钳位型(seven-level active neutral-pointclamped inverter,ANPC-7L)逆变器的开关状态,给出悬浮电容电压控制的方法,指出其开关状态切换时可能出现的串联管动态均压问题和多电平跳变问题。该文提出一种新型的改进拓扑和换流策略,可以彻底解决这两个问题。在一台380V/5kW的ANPC-7L逆变器上取得的实验结果表明,所提拓扑和换流策略是有效的。
The active neutral-point-clamped(ANPC) Multilevel inverter is a newly emerging inverter. This paper analyzed the switching status of the normal seven-level active neutral-point-clamped(ANPC-7L) inverter, introduced a method of floating capacitor voltage controlling and pointed out the problems of dynamic voltage balancing in series switches and multi voltage level jumping during switching status transition. This paper presented a novel improved topology and commutating strategies which can completely resolve these two problems. The feasibility of the proposed topology and commutating strategies were verified by experimental results from a 380 V/5 kW ANPC-7L inverter.
The active neutral-point-clamped(ANPC) Multilevel inverter is a newly emerging inverter. This paper analyzed the switching status of the normal seven-level active neutral-point-clamped(ANPC-7L) inverter, introduced a method of floating capacitor voltage controlling and pointed out the problems of dynamic voltage balancing in series switches and multi voltage level jumping during switching status transition. This paper presented a novel improved topology and commutating strategies which can completely resolve these two problems. The feasibility of the proposed topology and commutating strategies were verified by experimental results from a 380 V/5 kW ANPC-7L inverter.
引文
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[16]王奎,郑泽东,李永东.五电平有源中点钳位型逆变器母线中点电压平衡问题[J].中国电机工程学报,2012,32(3):30-35.Wang Kui,Zheng Zedong,Li Yongdong.Neutral-point potential balancing problem of five-level active neutral point-clamped inverter[J].Proceeding of the CSEE,2012,32(3):30-35(in Chinese).
[17]王奎,郑泽东,李永东.基于零序电压注入的五电平有源中点钳位型逆变器多目标优化控制策略[J].电工技术学报,2014,29(6):129-135.Wang Kui,Zheng Zedong,Li Yongdong.Multi-purpose optimal control strategy of a five-level active neutral-point clamped inverter based on zero-sequence voltage injection[J].Transactions of China Electrotechnical Society,2014,29(6):129-135(in Chinese).
[18]王奎,郑泽东,李永东,等.基于五电平有源中点钳位型双PWM变换器的异步电机矢量控制系统[J].电工技术学报,2014,29(2):247-252.Wang Kui,Zheng Zedong,Li Yongdong,et al.Vector control system for induction motors based on five-level active neutral-point-clamped dual-PWM converter[J].Transactions of China Electrotechnical Society,2014,29(2):247-252(in Chinese).
[19]王琛琛,司夏河,杨超.五电平有源中点钳位型变换器电容电压平衡控制策略[J].北京交通大学学报,2016,40(3):25-31.Wang Chenchen,Si Xiahe,Yang Chao.Capacitor voltage balancing control strategy of a five-level ANPC converter[J].Journal of Beijing Jiaotong University,2016,40(3):25-31(in Chinese).
[20]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 neutralpoint potential balancing problems of active neutral-pointclamped five-level inverter based on space vector pulse width modulation[J].Proceedings of the CSEE,2015,35(24):6499-6507(in Chinese).
[2]Nabae A,Takahashi I,Akagi H.A new neutral-pointclamped PWM inverter[J].IEEE Transactions on Industry Applications,1981,IA-17(5):518-523.
[3]Meynard T A,Foch H,Thomas P,et al.Multicell converters:basic concepts and industry applications[J].IEEE Transactions on Industrial Electronics,2002,49(5):955-964.
[4]Hammond P W.A new approach to enhance power quality for medium voltage AC drives[J].IEEE Transactions on Industry Applications,1997,33(1):202-208.
[5]Fazel S S,Bernet S,Krug D,et al.Design and comparison of 4-k V neutral-point-clamped,flying-capacitor,and series-connected H-bridge multilevel converters[J].IEEE Transactions on Industry Applications,2007,43(4):1032-1040.
[6]Ding Guanjun,Tang Guangfu,He Zhiyuan,et al.New technologies of voltage source converter(VSC)for HVDC transmission system based on VSC[C]//Proceedings of IEEE Power and Energy Society General MeetingConversion and Delivery of Electrical Energy in the 21st Century.Pittsburgh,PA:IEEE,2008:1-8.
[7]Gateau G,Meynard T A,Foch H.Stacked multicell converter(SMC):properties and design[C]//Proceedings of the 32nd Annual Power Electronics Specialists Conference.Vancouver,BC:IEEE,2001,3:1583-1588.
[8]Delmas L,Gateau G,Meynard T A,et al.Stacked multicell converter(SMC):control and natural balancing[C]//Proceedings of the 33rd Annual Power Electronics Specialists Conference.Cairns,Qld,Australia:IEEE,2002,2:689-694.
[9]Barbosa P,Steimer P,Meysenc L,et al.Active neutralpoint-clamped multilevel converters[C]//Proceedings of the 36th Annual Power Electronics Specialists Conference.Recife:IEEE,2005:2296-2301.
[10]Guan Minyuan,Xu Zheng.Modeling and control of a modular multilevel converter-based HVDC system under unbalanced grid conditions[J].IEEE Transactions on Power Electronics,2012,27(12):4858-4867.
[11]Hagiwara M,Nishimura K,Akagi H.A medium-voltage motor drive with a modular multilevel PWM inverter[J].IEEE Transactions on Power Electronics,2010,25(7):1786-1799.
[12]Kieferndorf F,Basler M,Serpa L A,et al.A new medium voltage drive system based on ANPC-5L technology[C]//Proceedings of 2010 IEEE International Conference on Industrial Technology(ICIT).Vi a del Mar:IEEE,2010:643-649.
[13]Konstantinou G,Pulikanti S,Ciobotaru M,et al.The seven-level flying capacitor based ANPC converter for grid intergration of utility-scale PV systems[C]//Proceedings of the 2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems(PEDG).Aalborg:IEEE,2012:592-597.
[14]Pulikanti S R,Konstantinou G,Agelidis V G.An n-level flying capacitor based active neutral point clamped converter[C]//Proceedings of the 2010 2nd IEEE International Symposium on Power Electronics for Distributed Generation Systems(PEDG).Hefei,China:IEEE,2010:553-558.
[15]Pulikanti S R,Konstantinou G S,Agelidis V G.Generalisation of flying capacitor-based activeneutralpoint-clamped multilevel converter using voltagelevel modulation[J].IET Power Electronics,2012,5(4):456-466.
[16]王奎,郑泽东,李永东.五电平有源中点钳位型逆变器母线中点电压平衡问题[J].中国电机工程学报,2012,32(3):30-35.Wang Kui,Zheng Zedong,Li Yongdong.Neutral-point potential balancing problem of five-level active neutral point-clamped inverter[J].Proceeding of the CSEE,2012,32(3):30-35(in Chinese).
[17]王奎,郑泽东,李永东.基于零序电压注入的五电平有源中点钳位型逆变器多目标优化控制策略[J].电工技术学报,2014,29(6):129-135.Wang Kui,Zheng Zedong,Li Yongdong.Multi-purpose optimal control strategy of a five-level active neutral-point clamped inverter based on zero-sequence voltage injection[J].Transactions of China Electrotechnical Society,2014,29(6):129-135(in Chinese).
[18]王奎,郑泽东,李永东,等.基于五电平有源中点钳位型双PWM变换器的异步电机矢量控制系统[J].电工技术学报,2014,29(2):247-252.Wang Kui,Zheng Zedong,Li Yongdong,et al.Vector control system for induction motors based on five-level active neutral-point-clamped dual-PWM converter[J].Transactions of China Electrotechnical Society,2014,29(2):247-252(in Chinese).
[19]王琛琛,司夏河,杨超.五电平有源中点钳位型变换器电容电压平衡控制策略[J].北京交通大学学报,2016,40(3):25-31.Wang Chenchen,Si Xiahe,Yang Chao.Capacitor voltage balancing control strategy of a five-level ANPC converter[J].Journal of Beijing Jiaotong University,2016,40(3):25-31(in Chinese).
[20]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 neutralpoint potential balancing problems of active neutral-pointclamped five-level inverter based on space vector pulse width modulation[J].Proceedings of the CSEE,2015,35(24):6499-6507(in Chinese).