基于系统级功率平衡的双PWM变频系统模型预测控制研究
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摘要
近些年来,双侧脉宽调制变频系统相关技术的研究已成为热点问题,该文在模型预测控制的基础上,提出了一种新型的功率预测算法。该算法中,整流侧采用模型预测直接功率控制,逆变侧采用模型预测直接转矩控制,为了补偿系统本身延迟,双侧均采用2步预测控制。同时,在直流电压外环中引入系统级功率平衡模型,在逆变侧输出功率前馈的基础上,对稳态响应所需功率进行实时性预测补偿,对动态响应所需功率进行阶段性超前预测补偿。以异步电机为负载的仿真和实验对比研究结果表明,改进的功率预测控制能够进一步抑制突变时的电压波动,提高了直流侧的动态响应,在系统能量流动精确控制的同时实现了双侧控制性能的协调提升。
The research on the technology of the dual-pulse width modulation(PWM) converter system has become a hot issue recently. Based on the model predictive control, a novel power prediction control algorithm was proposed in this paper, in the rectifier side model predictive direct power control was adopted, and in the inverter side model predictive direct torque control was used. Two-step prediction based on the model predictive control(MPC) algorithm was developed to compensate for the delay of a digital control system. Meanwhile, a system-level power balance model was introduced into the DC bus voltage outer loop, and the active power reference was defined based on inverter's output feedback in real-time and periodic power compensation. The excellence of the proposed power prediction scheme was verified by experiments for the induction motor drive system fed by this dual-PWM converter. All the results confirm that the proposed control strategy has improved the dynamic response of the DC link, also effectively inhibited the DC bus voltage fluctuation, and therefore achieved coordinate performance improvement on both rectifier and inverter sides.
The research on the technology of the dual-pulse width modulation(PWM) converter system has become a hot issue recently. Based on the model predictive control, a novel power prediction control algorithm was proposed in this paper, in the rectifier side model predictive direct power control was adopted, and in the inverter side model predictive direct torque control was used. Two-step prediction based on the model predictive control(MPC) algorithm was developed to compensate for the delay of a digital control system. Meanwhile, a system-level power balance model was introduced into the DC bus voltage outer loop, and the active power reference was defined based on inverter's output feedback in real-time and periodic power compensation. The excellence of the proposed power prediction scheme was verified by experiments for the induction motor drive system fed by this dual-PWM converter. All the results confirm that the proposed control strategy has improved the dynamic response of the DC link, also effectively inhibited the DC bus voltage fluctuation, and therefore achieved coordinate performance improvement on both rectifier and inverter sides.
引文
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[11]Quevedo D E,Aguilera R P,Perez M A.Model predictive control of an AFE rectifier with dynamic references[J].IEEE Transactions on Power Electronics,2012,27(7):3128-3136.
[12]Rodriguez J,Pontt J,Vargas R,et al.Predictive direct torque control of an induction machine fed by a matrix converter[C]//Proceedings of IEEE Conference on Power Electronics and Applications.Aalborg:IEEE,2007:1-10.
[13]王东文,李崇坚,吴尧.永磁同步电机的模型预测电流控制器研究[J].电工技术学报,2014,29(1):73-79.Wang Dongwen,Li Chongjian,Wu Yao.Model predictive current control scheme for permanent magnet synchronous motors[J].Transactions of China Electrotechnical Society,2014,29(1):73-79(in Chinese).
[14]王宏佳,徐殿国,杨明.永磁同步电机改进无差拍电流预测控制[J].电工技术学报,2011,26(6):39-45.Wang Hongjia,Xu Dianguo,Yang Ming.Improved deadbeat predictive current control strategy of permanent magnet motor drives[J].Transactions of China Electrotechnical Society,2011,26(6):39-45(in Chinese).
[15]Tobias G.Model predictive direct torque control:derivation and analysis of the state-feedback control law[J].IEEE Transactions on Industry Applications,2013,49(5):2146-2157.
[16]Thomas B,Tobias G.Deadlock avoidance in model predictive direct torque control[J].IEEE Transactions on Industry Applications,2013,49(5):2126-2135.
[17]Hur N,Jung J,Nam K.A fast dynamic DC-link power-balancing scheme for a PWM converter–inverter system[J].IEEE Trans.on Industrial Electronics,2001,48(4):794-803.
[18]Rodr′?guez J,Pontt J,Correa P,et al.Predictive power control of an AC/DC/AC converter[C]//Proceedings of IEEE Conference in Fourtieth IAS Annual Meeting.Hong Kong,China:IEEE,2005:934-939.
[19]Cortes P,Kouro S,Rocca B L,et al.Guidelines for weighting factors design in model predictive control of power converters and drives[C]//Proceedings of IEEE Conference in ICIT.Gippsland,VIC:IEEE,2009:1-7.
[2]Rodriguez J,Kennel R,Espinoza J,et al.Highperformance control strategies for electrical drives:An experimental assessment[J].IEEE Trans.on Industrial Electronics,2012,59(2):812-820.
[3]张永昌,杨海涛.异步电机无速度传感器模型预测控制[J].中国电机工程学报,2014,34(15):2422-2429.Zhang Yongchang,Yang Haitao.Model predictive control for speed sensorless induction motor drive[J].Proceedings of the CSEE,2014,34(15):2422-2429(in Chinese).
[4]李玉玲,王克柔,林辉品,等.三相Boost并网逆变器的离散时间预测控制[J].中国电机工程学报,2011,31(15):22-26.Li Yuling,Wang Kerou,Lin Huipin,et al.Discrete-time predictive control of three-phase Boost grid-connected inverter[J].Proceedings of the CSEE,2011,31(15):22-26(in Chinese).
[5]Rawlings J,Mayne D.Model predictive control,theory and design.madison[M].WI:Nob Hill Publ.,2009.
[6]沈坤,章兢,王坚.一种多步预测的变流器有限控制集模型预测控制算法[J].中国电机工程学报,2012,32(33):37-44.Shen kun,Zhang Jing,Wang Jian.A model predictive control scheme of multi-step prediction finite control set for converters[J].Proceedings of the CSEE,2012,32(33):37-44(in Chinese).
[7]杨兴武,姜建国.电压型PWM整流器预测直接功率控制[J].中国电机工程学报,2011,31(3):34-39.Yang Xingwu,Jiang Jianguo.Predictive direct power control for three-phase voltage source PWM rectifiers[J].Proceedings of the CSEE,2011,31(3):34-39(in Chinese).
[8]曹晓冬,谭国俊,王从刚.三相PWM整流器模型预测虚拟电压矢量控制[J].中国电机工程学报,2014,34(18):2926-2935.Cao Xiaodong,Tan Guojun,Wang Conggang.Model predictive virtual voltage vector control for three-phase PWM rectifiers[J].Proceedings of the CSEE,2014,34(18):2926-2935(in Chinese).
[9]Corte′s P,Rodr′?guez J,Antoniewicz P,et al.Direct power control of an AFE using predictive control[J].IEEE Transactions on Power Electronics,2008,23(5):2516-2523.
[10]Zhang Yongchang,Xie Wei,Li Zhengxi.Low-complexity model predictive power control:Double-vector-based approach[J].IEEE Trans.on Industrial Electronics,2014,61(11):5871-5880.
[11]Quevedo D E,Aguilera R P,Perez M A.Model predictive control of an AFE rectifier with dynamic references[J].IEEE Transactions on Power Electronics,2012,27(7):3128-3136.
[12]Rodriguez J,Pontt J,Vargas R,et al.Predictive direct torque control of an induction machine fed by a matrix converter[C]//Proceedings of IEEE Conference on Power Electronics and Applications.Aalborg:IEEE,2007:1-10.
[13]王东文,李崇坚,吴尧.永磁同步电机的模型预测电流控制器研究[J].电工技术学报,2014,29(1):73-79.Wang Dongwen,Li Chongjian,Wu Yao.Model predictive current control scheme for permanent magnet synchronous motors[J].Transactions of China Electrotechnical Society,2014,29(1):73-79(in Chinese).
[14]王宏佳,徐殿国,杨明.永磁同步电机改进无差拍电流预测控制[J].电工技术学报,2011,26(6):39-45.Wang Hongjia,Xu Dianguo,Yang Ming.Improved deadbeat predictive current control strategy of permanent magnet motor drives[J].Transactions of China Electrotechnical Society,2011,26(6):39-45(in Chinese).
[15]Tobias G.Model predictive direct torque control:derivation and analysis of the state-feedback control law[J].IEEE Transactions on Industry Applications,2013,49(5):2146-2157.
[16]Thomas B,Tobias G.Deadlock avoidance in model predictive direct torque control[J].IEEE Transactions on Industry Applications,2013,49(5):2126-2135.
[17]Hur N,Jung J,Nam K.A fast dynamic DC-link power-balancing scheme for a PWM converter–inverter system[J].IEEE Trans.on Industrial Electronics,2001,48(4):794-803.
[18]Rodr′?guez J,Pontt J,Correa P,et al.Predictive power control of an AC/DC/AC converter[C]//Proceedings of IEEE Conference in Fourtieth IAS Annual Meeting.Hong Kong,China:IEEE,2005:934-939.
[19]Cortes P,Kouro S,Rocca B L,et al.Guidelines for weighting factors design in model predictive control of power converters and drives[C]//Proceedings of IEEE Conference in ICIT.Gippsland,VIC:IEEE,2009:1-7.