基于直流侧储能电感电流最优给定的三相电流源型逆变器控制策略
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摘要
传统三相电流源型逆变器在空间矢量调制过程中,直流侧储能电感电流在一个载波周期内通常被视为恒定,忽略了储能电感的充放电过程,导致储能电感电流出现断续或持续增加的问题。首先对传统三相电流源型逆变器直流侧拓扑做出改进,深入分析调制过程中电流源型逆变器的三种工作模式,提出任意工作条件下储能电感电流最优给定值的计算方法,并针对改进拓扑设计调制策略以维持储能电感电流的稳定。然后,建立两相旋转坐标系下三相电流源型逆变器的交流侧数学模型,据此设计电压内环与电流外环闭环控制系统。仿真和实验结果表明,直流储能电感的最优给定电流能够满足交流侧的电流需求且电流可以维持在限定值附近,同时逆变器负载电流能够精确跟随给定,系统具有良好的稳态和动态性能,证明了所提调制及控制策略的可行性与正确性。
In space vector modulation process for traditional three-phase current source inverter(CSI),DC storage inductance current is usually considered constant and charge-discharge process is ignored during a carrier period for traditional three-phase current source inverter,which causes storage inductance current discontinuous or continuous increasing.The DC-side topology of CSI was improved in this paper.Firstly,three working modes of storage inductance were analyzed in modulation process.The calculating method for optimal given value of storage inductance current was proposed under each working condition,and the modulation strategy was designed to guarantee storage inductance current constant for improved topology.Secondly,the math model of ac-side was derived in two-phase rotating reference frame.In addition,the closed-loop control system of voltage outer loop and current inner loop was designed.Finally,both the simulation and experimental results show the optimal given value of storage inductance current can meet the demand of ac-side and be maintained within a certain range.Besides,load current of CSI can accurately follow the given,system has good steady and dynamic performance.Thus,the correctness and feasibility of proposed modulation strategy and control method are proved.
In space vector modulation process for traditional three-phase current source inverter(CSI),DC storage inductance current is usually considered constant and charge-discharge process is ignored during a carrier period for traditional three-phase current source inverter,which causes storage inductance current discontinuous or continuous increasing.The DC-side topology of CSI was improved in this paper.Firstly,three working modes of storage inductance were analyzed in modulation process.The calculating method for optimal given value of storage inductance current was proposed under each working condition,and the modulation strategy was designed to guarantee storage inductance current constant for improved topology.Secondly,the math model of ac-side was derived in two-phase rotating reference frame.In addition,the closed-loop control system of voltage outer loop and current inner loop was designed.Finally,both the simulation and experimental results show the optimal given value of storage inductance current can meet the demand of ac-side and be maintained within a certain range.Besides,load current of CSI can accurately follow the given,system has good steady and dynamic performance.Thus,the correctness and feasibility of proposed modulation strategy and control method are proved.
引文
[1]张丽霞,颜湘武,康伟,等.基于空间电流矢量的动力蓄电池组测试系统变流技术[J].电工技术学报,2010,25(9):122-128.Zhang Lixia,Yan Xiangwu,Kang Wei,et al.Converting technology based on the current mode SVPWM on the power accumulator battery testing system[J].Transactions of China Electrotechnical Society,2010,25(9):122-128.
[2]郭强,刘和平,彭东林,等.静止坐标系下电流型PWM整流器电流环控制策略研究及其参数设计[J].中国电机工程学报,2014,34(15):2353-2361.Guo Qiang,Liu Heping,Peng Donglin,et al.A novel control strategy and its parameter design of the current-loop in a stationary frame for current-source PWM rectifiers[J].Proceedings of the CSEE,2014,34(15):2353-2361.
[3]Wang Z,Chau K T,Yuwen B,et al.Power compensation and power quality improvement based on multiple channel current source converter fed HTSMES[J].IEEE Transactions on Applied Superconductivity,2012,22(3):1-4.
[4]苗轶如,刘和平,王华斌,等.单相电流源型逆变器储能电感电流优化调制及控制策略[J].电工技术学报,2018,33(6):1227-1237.Miao Yiru,Liu Heping,Wang Huabin,et al.The modulation and control strategy of storage inductance current for single-phase current source inverter[J].Transactions of China Electrotechnical Society,2018,33(6):1227-1237.
[5]郭强,刘和平,彭东林,等.一种考虑电池自身特性的电流源型充电系统[J].电工技术学报,2016,31(16):16-25.Guo Qiang,Liu Heping,Peng Donglin,et al.Acurrent-source charging system considering the characteristics of battery[J].Transactions of China Electrotechnical Society,2016,31(16):16-25.
[6]Garcia L S,Buiatti G M,Freitas L C D,et al.Dual transformerless single-stage current source inverter with energy management control strategy[J].Transactions on Power Electronic,2013,28(10):4644-4655.
[7]鲍建宇,鲍卫兵,李玉玲.光伏并网三相电流型多电平变流器拓扑与控制[J].电工技术学报,2016,31(8):70-75.Bao Jianyu,Bao Weibing,Li Yuling.Topology and control of three-phase multilevel current-source converter for photovoltaic grid-connection[J].Transactions of China Electrotechnical Society,2016,31(8):70-75.
[8]熊宇,李玉玲,廖鸿飞.光伏并网电流源逆变器扰动电阻最大功率跟踪策略[J].电网技术,2014,38(12):3300-3304.Xiong Yu,Li Yuling,Liao Hongfei.A perturbing resistance maximum power point tracking strategy of current source inverter for grid-connected PVgeneration system[J].Power System Technology,2014,38(12):3300-3304.
[9]李开鑫.基于电流跟踪型SVPWM控制策略的SVG研究[J].电气技术,2016,17(2):58-62,76.Li Kaixin.The study of SVG based on currenttracking SVPWM control strategy[J].Electrical Engineering,2016,17(2):58-62,76.
[10]秦海鸿,张鑫,朱梓悦,等.电流型PWM整流器叠流时间对网侧电流影响及其抑制方法[J].电工技术学报,2016,31(12):142-152.Qin Haihong,Zhang Xin,Zhu Ziyue,et al.Influence of overlap time on the AC grid current of current source PWM rectifier and restraining method[J].Transactions of China Electrotechnical Society,2016,31(12):142-152.
[11]Shang Jian,Li Yunwei.A space-vector modulation method for common-mode voltage reduction in current-source converters[J].IEEE Transactions on Power Electronics,2014,29(1):374-385.
[12]Lian Yujuan,Li Yunwei,Quan Zhongyi,et al.SVMstrategies for common-mode current reduction in transformerless current source drives at low modulation index[J].IEEE Transactions on Power Electronics,2017,32(2):1312-1323.
[13]Li Yunwei,Wu Bin.Space vector sequence investigation and synchronization methods for active front-end rectifiers in high-power current-source drives[J].IEEE Transactions on Industrial Electronics,2008,55(3):1022-1034.
[14]Cao Dong,Jiang Shuai,Yu Xianhao,et al.Low-cost semi-Z-source inverter for single-phase photovoltaic systems[J].IEEE Transactions on Power Electronics,2011,26(12):3514-3523.
[15]Fang Xupeng,Chen Zhiqiao,Wang Xuguang.Current fed quasi-Z-source inverter based adjustable speed drive system with bidirectional power flow[J].IEEETransactions on Applied Superconductivity,2014,24(5):0600306.
[16]郭强,刘和平,彭东林.电动汽车用高性能电流型Tran-Z逆变器特性研究[J].电机与控制学报,2015,19(5):74-80.Guo Qiang,Liu Heping,Peng Donglin.Current source inverter fed electric vehicle motor drive system with high performance[J].Electric Machine and Control,2015,19(5):74-80.
[17]Su Guijia,Tang Lixin.Current source inverter based traction drive for EV battery charging applications[C]//IEEE Vehicle Power and Propulsion Conference,Chicago,USA,2011:1-6.
[18]陈亦文,邱琰辉,何永吉,等.储能电感电流限定单周期控制单相电流型PWM逆变器研究[J].电工技术学报,2015,30(14):311-319.Chen Yiwen,Qiu Yanhui,He Yongji,et al.Research on single-phase current mode PWM inverter of one-cycle control strategy with limited storage inductance current[J].Transactions of China Electrotechnical Society,2015,30(14):311-319.
[19]Lee Hak-Jun,Jung Sung-Ho,Sul Seung-Ki.A current controller design for current source inverter-fed ACmachine drive system[J].IEEE Transactions on Power Electronic,2013,28(3):1366-1380.
[20]徐海亮,廖自力,贺益康.基于旋转坐标变换的实系数与复系数PI调节器性能比较[J].电工技术学报,2016,31(6):171-176.Xu Hailiang,Liao Zili,He Yikang.Characteristic comparison of the real-and complex-coefficient PIregulators based on coordinate rotating transformation[J].Transactions of China Electrotechnical Society,2016,31(6):171-176.
[21]李正明,高远,潘天虹.基于复合控制的有源电力滤波器电流控制策略[J].电力系统保护与控制,2017,45(15):55-61.Li Zhengming,Gao Yuan,Pan Tianhong.Compensation current control of APF based on compound control[J].Power System Protection and Control,2017,45(15):55-61.
[22]郭强.电流型PWM整流器控制策略及应用技术研究[D].重庆:重庆大学,2015.
[23]张兴,张崇巍.整流器及其控制[M].北京:机械工业出版社,2012.
[2]郭强,刘和平,彭东林,等.静止坐标系下电流型PWM整流器电流环控制策略研究及其参数设计[J].中国电机工程学报,2014,34(15):2353-2361.Guo Qiang,Liu Heping,Peng Donglin,et al.A novel control strategy and its parameter design of the current-loop in a stationary frame for current-source PWM rectifiers[J].Proceedings of the CSEE,2014,34(15):2353-2361.
[3]Wang Z,Chau K T,Yuwen B,et al.Power compensation and power quality improvement based on multiple channel current source converter fed HTSMES[J].IEEE Transactions on Applied Superconductivity,2012,22(3):1-4.
[4]苗轶如,刘和平,王华斌,等.单相电流源型逆变器储能电感电流优化调制及控制策略[J].电工技术学报,2018,33(6):1227-1237.Miao Yiru,Liu Heping,Wang Huabin,et al.The modulation and control strategy of storage inductance current for single-phase current source inverter[J].Transactions of China Electrotechnical Society,2018,33(6):1227-1237.
[5]郭强,刘和平,彭东林,等.一种考虑电池自身特性的电流源型充电系统[J].电工技术学报,2016,31(16):16-25.Guo Qiang,Liu Heping,Peng Donglin,et al.Acurrent-source charging system considering the characteristics of battery[J].Transactions of China Electrotechnical Society,2016,31(16):16-25.
[6]Garcia L S,Buiatti G M,Freitas L C D,et al.Dual transformerless single-stage current source inverter with energy management control strategy[J].Transactions on Power Electronic,2013,28(10):4644-4655.
[7]鲍建宇,鲍卫兵,李玉玲.光伏并网三相电流型多电平变流器拓扑与控制[J].电工技术学报,2016,31(8):70-75.Bao Jianyu,Bao Weibing,Li Yuling.Topology and control of three-phase multilevel current-source converter for photovoltaic grid-connection[J].Transactions of China Electrotechnical Society,2016,31(8):70-75.
[8]熊宇,李玉玲,廖鸿飞.光伏并网电流源逆变器扰动电阻最大功率跟踪策略[J].电网技术,2014,38(12):3300-3304.Xiong Yu,Li Yuling,Liao Hongfei.A perturbing resistance maximum power point tracking strategy of current source inverter for grid-connected PVgeneration system[J].Power System Technology,2014,38(12):3300-3304.
[9]李开鑫.基于电流跟踪型SVPWM控制策略的SVG研究[J].电气技术,2016,17(2):58-62,76.Li Kaixin.The study of SVG based on currenttracking SVPWM control strategy[J].Electrical Engineering,2016,17(2):58-62,76.
[10]秦海鸿,张鑫,朱梓悦,等.电流型PWM整流器叠流时间对网侧电流影响及其抑制方法[J].电工技术学报,2016,31(12):142-152.Qin Haihong,Zhang Xin,Zhu Ziyue,et al.Influence of overlap time on the AC grid current of current source PWM rectifier and restraining method[J].Transactions of China Electrotechnical Society,2016,31(12):142-152.
[11]Shang Jian,Li Yunwei.A space-vector modulation method for common-mode voltage reduction in current-source converters[J].IEEE Transactions on Power Electronics,2014,29(1):374-385.
[12]Lian Yujuan,Li Yunwei,Quan Zhongyi,et al.SVMstrategies for common-mode current reduction in transformerless current source drives at low modulation index[J].IEEE Transactions on Power Electronics,2017,32(2):1312-1323.
[13]Li Yunwei,Wu Bin.Space vector sequence investigation and synchronization methods for active front-end rectifiers in high-power current-source drives[J].IEEE Transactions on Industrial Electronics,2008,55(3):1022-1034.
[14]Cao Dong,Jiang Shuai,Yu Xianhao,et al.Low-cost semi-Z-source inverter for single-phase photovoltaic systems[J].IEEE Transactions on Power Electronics,2011,26(12):3514-3523.
[15]Fang Xupeng,Chen Zhiqiao,Wang Xuguang.Current fed quasi-Z-source inverter based adjustable speed drive system with bidirectional power flow[J].IEEETransactions on Applied Superconductivity,2014,24(5):0600306.
[16]郭强,刘和平,彭东林.电动汽车用高性能电流型Tran-Z逆变器特性研究[J].电机与控制学报,2015,19(5):74-80.Guo Qiang,Liu Heping,Peng Donglin.Current source inverter fed electric vehicle motor drive system with high performance[J].Electric Machine and Control,2015,19(5):74-80.
[17]Su Guijia,Tang Lixin.Current source inverter based traction drive for EV battery charging applications[C]//IEEE Vehicle Power and Propulsion Conference,Chicago,USA,2011:1-6.
[18]陈亦文,邱琰辉,何永吉,等.储能电感电流限定单周期控制单相电流型PWM逆变器研究[J].电工技术学报,2015,30(14):311-319.Chen Yiwen,Qiu Yanhui,He Yongji,et al.Research on single-phase current mode PWM inverter of one-cycle control strategy with limited storage inductance current[J].Transactions of China Electrotechnical Society,2015,30(14):311-319.
[19]Lee Hak-Jun,Jung Sung-Ho,Sul Seung-Ki.A current controller design for current source inverter-fed ACmachine drive system[J].IEEE Transactions on Power Electronic,2013,28(3):1366-1380.
[20]徐海亮,廖自力,贺益康.基于旋转坐标变换的实系数与复系数PI调节器性能比较[J].电工技术学报,2016,31(6):171-176.Xu Hailiang,Liao Zili,He Yikang.Characteristic comparison of the real-and complex-coefficient PIregulators based on coordinate rotating transformation[J].Transactions of China Electrotechnical Society,2016,31(6):171-176.
[21]李正明,高远,潘天虹.基于复合控制的有源电力滤波器电流控制策略[J].电力系统保护与控制,2017,45(15):55-61.Li Zhengming,Gao Yuan,Pan Tianhong.Compensation current control of APF based on compound control[J].Power System Protection and Control,2017,45(15):55-61.
[22]郭强.电流型PWM整流器控制策略及应用技术研究[D].重庆:重庆大学,2015.
[23]张兴,张崇巍.整流器及其控制[M].北京:机械工业出版社,2012.