鼠笼式感应电机模型预测直接转矩控制
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摘要
针对传统鼠笼式感应电机直接转矩控制转矩和定子磁链脉动大的问题,研究了一种考虑延迟补偿的改进模型预测直接转矩控制算法。在每个采样时刻,预测出在每个电压矢量下的下一时刻的定子磁链和转矩,与定子磁链参考值和转矩参考值的偏差作为目标函数,选择使目标函数最小的最优电压矢量。针对数字控制系统存在一拍延迟的问题,研究了一种多步预测的延迟补偿措施。仿真表明,该算法能够有效降低转矩和定子磁链脉动,减小电流谐波畸变,并解决了数字系统中存在的延迟问题。
To reduce the large torque and stator flux linkage ripple of the traditional squirrel cage induction motor on direct torque control(DTC), an improved model prediction direct torque control algorithm(MPDTC) considering delay compensation is studied. At each sampling instant, the stator flux linkage and torque at the next moment under each voltage vector are predicted, and the deviation from the stator flux linkage reference value and the torque reference value is used as the objective function, and the optimal voltage vector that minimizes the objective function is selected. Aiming at the problem of one-shot delay in digital control systems, a multi-step prediction delay compensation measure is studied. The simulation shows that the algorithm can effectively reduce the torque and stator flux pulsation,reduce the current harmonic distortion, and solve the delay problem in the digital system.
To reduce the large torque and stator flux linkage ripple of the traditional squirrel cage induction motor on direct torque control(DTC), an improved model prediction direct torque control algorithm(MPDTC) considering delay compensation is studied. At each sampling instant, the stator flux linkage and torque at the next moment under each voltage vector are predicted, and the deviation from the stator flux linkage reference value and the torque reference value is used as the objective function, and the optimal voltage vector that minimizes the objective function is selected. Aiming at the problem of one-shot delay in digital control systems, a multi-step prediction delay compensation measure is studied. The simulation shows that the algorithm can effectively reduce the torque and stator flux pulsation,reduce the current harmonic distortion, and solve the delay problem in the digital system.
引文
[1]赵超,刘文生.异步电机模型预测直接转矩控制方法的研究[J].变频器世界,2017(3):59-63+101.
[2]Miranda H,Cortés P,Yuz J I,et al.Predictive torque control of induction machines based on state-space models[J].IEEETransactions on Industrial Electronics,2009,56(6):1916-1924.
[3]Duran M J,Prieto J,Barrero F,et al.Predictive current control of dual three-phase drives using restrained search techniques[J].IEEE Transactions on Industrial Electronics,2011,58(8):3253-3263.
[4]朱晓雨,王丹,彭周华,等.异步电机模型预测直接转矩控制[J].电机与控制应用,2016,43(2):6-12.
[5]杨文杰,张爱玲,詹哲军,等.基于转矩预测的直接转矩控制系统的实现[J].电气传动自动化,2007(6):8-11.
[6]Davari S,Khaburi D,Kennel R.An improved FCS-MPCalgorithm for an induction motor with an imposed optimized weighting factor[J].IEEE Transactions on Power Electronics,2012,27(3):1540-1551.
[7]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.
[8]Rodríguez J,Kennel R M,Espinoza J R,et al.High-performance control strategies for electrical drives:an experimental assessment[J].IEEE Transactions on Industrial Electronics,2012,59(2):812-820.
[9]Zhang Yongchang,Zhu Jianguo,Xu Wei.Analysis of one step delay in direct torque control of permanent magnet synchronous motor and its remedies[C].2010 International Conference on Electrical Machines and Systems,2010:792-797.
[10]张永昌,杨海涛.感应电机模型预测磁链控制[J].中国电机工程学报,2015,35(3):719-726.
[2]Miranda H,Cortés P,Yuz J I,et al.Predictive torque control of induction machines based on state-space models[J].IEEETransactions on Industrial Electronics,2009,56(6):1916-1924.
[3]Duran M J,Prieto J,Barrero F,et al.Predictive current control of dual three-phase drives using restrained search techniques[J].IEEE Transactions on Industrial Electronics,2011,58(8):3253-3263.
[4]朱晓雨,王丹,彭周华,等.异步电机模型预测直接转矩控制[J].电机与控制应用,2016,43(2):6-12.
[5]杨文杰,张爱玲,詹哲军,等.基于转矩预测的直接转矩控制系统的实现[J].电气传动自动化,2007(6):8-11.
[6]Davari S,Khaburi D,Kennel R.An improved FCS-MPCalgorithm for an induction motor with an imposed optimized weighting factor[J].IEEE Transactions on Power Electronics,2012,27(3):1540-1551.
[7]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.
[8]Rodríguez J,Kennel R M,Espinoza J R,et al.High-performance control strategies for electrical drives:an experimental assessment[J].IEEE Transactions on Industrial Electronics,2012,59(2):812-820.
[9]Zhang Yongchang,Zhu Jianguo,Xu Wei.Analysis of one step delay in direct torque control of permanent magnet synchronous motor and its remedies[C].2010 International Conference on Electrical Machines and Systems,2010:792-797.
[10]张永昌,杨海涛.感应电机模型预测磁链控制[J].中国电机工程学报,2015,35(3):719-726.