电流源型逆变器电机驱动系统的储能电感电流与转子磁链最优控制策略
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摘要
在电流源型电机驱动系统中,直流侧电压源与储能电感共同构成电流源为交流负载提供能量,然而在调制过程中,因储能电感电流无法独立控制而导致电流出现断续或持续增加的问题,且电机减速时无法实现能量回馈。该文在电流源型逆变器的直流侧增加电压–电流变换电路实现对储能电感电流的控制及能量的回馈,并设计一种适合于储能电感电流的滞环控制策略。与此同时,为了提高直流侧电流利用率,降低线路损耗,通过推导出转子磁链定向后储能电感电流与转子磁链的稳态数学关系,得到不同转速与电磁转矩情况下转子磁链与储能电感电流最优给定值的确定方法,并在此基础上设计电机转速、转子磁链闭环控制策略。仿真和实验结果验证了所提出的转子磁链与储能电感电流给定值计算方法的正确性,且基于储能电感电流调节的感应电机矢量控制系统在不同工况下均具有良好的稳态、动态性能。
In current source inverter motor drive system,dc-link voltage source and storage inductor together constitute current source to provide energy for AC load. However, in modulation process, storage inductor current cannot be controlled independently, which cause current discontinuous or continuous increasing, and energy cannot be recovered to battery during motor decelerating. A voltage-current converter was introduced in DC-link to implement DC storage inductor current control and energy recovery, and a novel hysteresis control strategy of storage inductor current was designed. In order to improve DC-link current utilization ratio and reduce line loss, the steady math relationship between storage inductor current and rotor flux was established, meanwhile, the optimal given value of storage inductor current and rotor flux can be defined by motor speed and electromagnetic torque. On this basis, the closed-loop control strategy of storage inductor current and rotor flux was designed. Simulation and experimental results show that the validity of the given value calculation method for rotor flux and storage inductor current,the induction motor vector control system based on energy storage inductor current regulation has good steady state and dynamic performance under different working conditions.
In current source inverter motor drive system,dc-link voltage source and storage inductor together constitute current source to provide energy for AC load. However, in modulation process, storage inductor current cannot be controlled independently, which cause current discontinuous or continuous increasing, and energy cannot be recovered to battery during motor decelerating. A voltage-current converter was introduced in DC-link to implement DC storage inductor current control and energy recovery, and a novel hysteresis control strategy of storage inductor current was designed. In order to improve DC-link current utilization ratio and reduce line loss, the steady math relationship between storage inductor current and rotor flux was established, meanwhile, the optimal given value of storage inductor current and rotor flux can be defined by motor speed and electromagnetic torque. On this basis, the closed-loop control strategy of storage inductor current and rotor flux was designed. Simulation and experimental results show that the validity of the given value calculation method for rotor flux and storage inductor current,the induction motor vector control system based on energy storage inductor current regulation has good steady state and dynamic performance under different working conditions.
引文
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[16]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.
[17]郭强,刘和平,彭东林.电动汽车用高性能电流型Trans-Z源逆变器特性研究[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 Machines and Control,2015,19(5):74-80(in Chinese).
[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(in Chinese).
[19]Su Guijia,Tang Lixin.Current source inverter based traction drive for EV battery charging applications[C]//Proceedings of 2011 IEEE Vehicle Power and Propulsion Conference.Chicago,IL,USA:IEEE,2011:1-6.
[20]王成元,夏加宽,孙宜标.现代电机控制技术[M].2版.北京:机械工业出版社,2014.Wang Chenyuan,Xia Jiakuan,Sun Yibiao.Modern control technology for electric machines[M].2nd ed.Beijing:China Machine Press,2014(in Chinese).
[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 PWMrectifiers[J].Proceedings of the CSEE,2014,34(15):2353-2361(in Chinese).
[3]Wang Zheng,Chau K T,Yuwen Bo,et al.Power compensation and power quality improvement based on multiple-channel current source converter fed HT SMES[J].IEEE Transactions on Applied Superconductivity,2012,22(3):5701204.
[4]苗轶如,刘和平,王华斌,等.电流源型逆变器叠流时间效应的平均电流前馈补偿策略[J].中国电机工程学报,2018,38(14):4183-4193.Miao Yiru,Liu Heping,Wang Huabin,et al.Average current feedforward compensation strategy of overlaptime effect for current source inverter[J].Proceedings of the CSEE,2018,38(14):4183-4193(in Chinese).
[5]Garcia L S,Buiatti G M,de Freitas L C,et al.Dual transformerless single-stage current source inverter with energy management control strategy[J].IEEETransactions on Power Electronics,2013,28(10):4644-4656.
[6]Wu Bin,Pontt J,Rodriguez J,et al.Current-source converter and cycloconverter topologies for industrial medium-voltage drive[J].IEEE Transactions on Industrial Electronics,2008,55(7):2786-2797.
[7]Kouro S,Rodriguez J,Wu Bin,et al.Powering the future of industry:high-power adjustable speed drive topologies[J].IEEE Industry Applications Magazine,2012,18(4):26-39.
[8]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(in Chinese).
[9]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 PV generation system[J].Power System Technology,2014,38(12):3300-3304(in Chinese).
[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(in Chinese).
[11]郭强,刘和平,彭东林,等.电流型PWM整流器多环控制策略及其参数设计[J].中国电机工程学报,2015,35(5):1193-1202.Guo Qiang,Liu Heping,Peng Donglin,et al.A multi-loop control strategy and parameter design for current-source PWM rectifiers[J].Proceedings of the CSEE,2015,35(5):1193-1202(in Chinese).
[12]Lee H J,Jung S,Sul S K.A current controller design for current source inverter-fed AC machine drive system[J].IEEE Transactions on Power Electronics,2013,28(3):1366-1381.
[13]Li Yunwei,Pande M,Zargari N R,et al.DC-link current minimization for high-power current-source motor drives[J].IEEE Transactions on Power Electronics,2009,24(1):232-240.
[14]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.
[15]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.
[16]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.
[17]郭强,刘和平,彭东林.电动汽车用高性能电流型Trans-Z源逆变器特性研究[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 Machines and Control,2015,19(5):74-80(in Chinese).
[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(in Chinese).
[19]Su Guijia,Tang Lixin.Current source inverter based traction drive for EV battery charging applications[C]//Proceedings of 2011 IEEE Vehicle Power and Propulsion Conference.Chicago,IL,USA:IEEE,2011:1-6.
[20]王成元,夏加宽,孙宜标.现代电机控制技术[M].2版.北京:机械工业出版社,2014.Wang Chenyuan,Xia Jiakuan,Sun Yibiao.Modern control technology for electric machines[M].2nd ed.Beijing:China Machine Press,2014(in Chinese).