永磁同步电机(permanent magnet synchronous motor,PMSM)具有高效率、高功率密度与高可靠性等优势,已在工业界得到广泛应用。文中针对PMSM驱动系统,提出基于拓展控制集的有限控制集无模型预测电流控制(finite-control-set model-free p...永磁同步电机(permanent magnet synchronous motor,PMSM)具有高效率、高功率密度与高可靠性等优势,已在工业界得到广泛应用。文中针对PMSM驱动系统,提出基于拓展控制集的有限控制集无模型预测电流控制(finite-control-set model-free predictive current control,FCS-MFPCC)。首先,分析PMSM系统的数学模型并详述有限控制集模型预测电流控制(finite-control-set model predictive current control,FCS-MPCC)的原理。其次,介绍基于线性扩张状态观测器(linear extended state observer,LESO)的传统FCS-MFPCC。针对传统FCS-MFPCC稳态性能不足的问题,采用基于离散空间矢量调制(discrete space vector modulation,DSVM)的控制集拓展方案,将控制集的电压矢量数目拓展至25。然后,为解决拓展控制集带来的高计算量问题,提出一种快速寻优策略,阐述该策略的实施原理与流程。最后,基于一台500 W PMSM实验平台,对比传统FCS-MFPCC与所提FCS-MFPCC的控制性能,验证所提算法的有效性与优越性。实验结果表明,所提算法能够有效提升系统稳态性能,且定子绕组电流总谐波畸变率由10.07%降低至6.48%。展开更多
车辆到电网(vehicle to grid, V2G)技术可实现电动汽车与电网能量双向互动,可减轻对电力系统的潜在负荷影响并且对电网起到“削峰填谷”的作用,以此提高供电可靠性。目前,V2G系统网侧电流谐波的抑制效果并不显著,为了降低谐波畸变率,设...车辆到电网(vehicle to grid, V2G)技术可实现电动汽车与电网能量双向互动,可减轻对电力系统的潜在负荷影响并且对电网起到“削峰填谷”的作用,以此提高供电可靠性。目前,V2G系统网侧电流谐波的抑制效果并不显著,为了降低谐波畸变率,设计了一种基于脉宽调制(pulse-width modulation, PWM)型整流器和双向DC-DC变换器的拓扑结构,用以控制网侧与蓄电池的能量流动;提出了一种充电和放电时分别采用电压电流双闭环控制以及有限集模型预测电流控制(finite-control-set model predictive current control, FCS-MPCC)的策略,更好地抑制网侧电流谐波,降低谐波畸变率。在Matlab/Simulink中搭建了V2G系统模型进行仿真验证,仿真结果表明设计的V2G系统可实现网侧与蓄电池的互动,充电状态下网侧电流总谐波畸变率降为0.33%,放电状态下网侧电流总谐波畸变率降为0.48%,有效解决了电动汽车并网导致的电流谐波畸变。展开更多
This paper presents an improved finite control set model predictive current control(FCS-MPCC)of a five-phase permanent magnet synchronous motor(PMSM).First,to avoid including all the 32 voltage vectors provided by a t...This paper presents an improved finite control set model predictive current control(FCS-MPCC)of a five-phase permanent magnet synchronous motor(PMSM).First,to avoid including all the 32 voltage vectors provided by a two-level five-phase inverter into the control set,virtual voltage vectors are adopted.As the third current harmonics can be much reduced by virtual voltage vectors automatically,the harmonic items in the cost function of conventional FCS-MPCC are not considered.Furthermore,an adaptive control set is proposed based on voltage prediction.Best control set with proper voltage vector amplitude corresponding to different rotor speed can be achieved by this method.Consequently,current ripples can be largely reduced and the system performs much better.At last,simulations are established to verify the steady and transient performance of the proposed FCS-MPCC,and experiments based on a 2 kW five-phase motor are carried out.The results have validated the performance improvement of the proposed control strategy.展开更多
文摘永磁同步电机(permanent magnet synchronous motor,PMSM)具有高效率、高功率密度与高可靠性等优势,已在工业界得到广泛应用。文中针对PMSM驱动系统,提出基于拓展控制集的有限控制集无模型预测电流控制(finite-control-set model-free predictive current control,FCS-MFPCC)。首先,分析PMSM系统的数学模型并详述有限控制集模型预测电流控制(finite-control-set model predictive current control,FCS-MPCC)的原理。其次,介绍基于线性扩张状态观测器(linear extended state observer,LESO)的传统FCS-MFPCC。针对传统FCS-MFPCC稳态性能不足的问题,采用基于离散空间矢量调制(discrete space vector modulation,DSVM)的控制集拓展方案,将控制集的电压矢量数目拓展至25。然后,为解决拓展控制集带来的高计算量问题,提出一种快速寻优策略,阐述该策略的实施原理与流程。最后,基于一台500 W PMSM实验平台,对比传统FCS-MFPCC与所提FCS-MFPCC的控制性能,验证所提算法的有效性与优越性。实验结果表明,所提算法能够有效提升系统稳态性能,且定子绕组电流总谐波畸变率由10.07%降低至6.48%。
文摘车辆到电网(vehicle to grid, V2G)技术可实现电动汽车与电网能量双向互动,可减轻对电力系统的潜在负荷影响并且对电网起到“削峰填谷”的作用,以此提高供电可靠性。目前,V2G系统网侧电流谐波的抑制效果并不显著,为了降低谐波畸变率,设计了一种基于脉宽调制(pulse-width modulation, PWM)型整流器和双向DC-DC变换器的拓扑结构,用以控制网侧与蓄电池的能量流动;提出了一种充电和放电时分别采用电压电流双闭环控制以及有限集模型预测电流控制(finite-control-set model predictive current control, FCS-MPCC)的策略,更好地抑制网侧电流谐波,降低谐波畸变率。在Matlab/Simulink中搭建了V2G系统模型进行仿真验证,仿真结果表明设计的V2G系统可实现网侧与蓄电池的互动,充电状态下网侧电流总谐波畸变率降为0.33%,放电状态下网侧电流总谐波畸变率降为0.48%,有效解决了电动汽车并网导致的电流谐波畸变。
基金This work was supported in part by the National Natural Science Foundation of China under 61374125。
文摘This paper presents an improved finite control set model predictive current control(FCS-MPCC)of a five-phase permanent magnet synchronous motor(PMSM).First,to avoid including all the 32 voltage vectors provided by a two-level five-phase inverter into the control set,virtual voltage vectors are adopted.As the third current harmonics can be much reduced by virtual voltage vectors automatically,the harmonic items in the cost function of conventional FCS-MPCC are not considered.Furthermore,an adaptive control set is proposed based on voltage prediction.Best control set with proper voltage vector amplitude corresponding to different rotor speed can be achieved by this method.Consequently,current ripples can be largely reduced and the system performs much better.At last,simulations are established to verify the steady and transient performance of the proposed FCS-MPCC,and experiments based on a 2 kW five-phase motor are carried out.The results have validated the performance improvement of the proposed control strategy.
