一种基于改进模型预测控制算法的空间矢量PWM虚拟磁链直接功率控制策略
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摘要
虚拟磁链定向的空间矢量PWM直接功率控制(VF-DPC-SVM)策略的功率内环PI控制参数整定过程复杂,电压型整流器(VSR)控制稳定性不高、快速性较差。对此,提出虚拟磁链定向的改进模型预测直接功率控制(VFMPDPC)策略。在功率内环用模型预测控制(MPC)算法代替PI控制器改善VSR的控制系能,并引入内模反馈校正环节在每个采样周期修正功率的预测给定值,通过改进的MPC模型实现对瞬时功率的高精度跟踪。仿真分析表明:改进的VF-MPDPC策略使系统稳态时调整时间短,响应快,电网污染小,输出母线电压质量高,功率纹波小;动态响应鲁棒性高,稳定性能好。
Due to the complexity of the power inner loop PI control parameter setting process of space vector PWM virtual flux linkage oriented direct power control( VF-DPC-SVM) strategy,the stability is not high and the rapidity is poor of the VSR control,therefore,an improved model predictive direct power control strategy for virtual flux( VF-MPDPC) in the paper was proposed. In the power inner loop,the model predictive control( MPC) algorithm was used to improve the control system of the VSR instead of the PI controller,and the feedback correction by internal model was introduced to correct the predicted value of the power in each sampling period,realizing the error-free tracking of the instantaneous power through the improved MPC model. The simulation results show that because of the improved VF-MPDPC,the adjustment time is short,the response is fast,the grid pollution is small,the output bus voltage quality is high,and the power ripple is small when the system is steady; meanwhile,the fluctuation is small,the dynamic response is robust,and the stability is good when the system changes dynamically.
Due to the complexity of the power inner loop PI control parameter setting process of space vector PWM virtual flux linkage oriented direct power control( VF-DPC-SVM) strategy,the stability is not high and the rapidity is poor of the VSR control,therefore,an improved model predictive direct power control strategy for virtual flux( VF-MPDPC) in the paper was proposed. In the power inner loop,the model predictive control( MPC) algorithm was used to improve the control system of the VSR instead of the PI controller,and the feedback correction by internal model was introduced to correct the predicted value of the power in each sampling period,realizing the error-free tracking of the instantaneous power through the improved MPC model. The simulation results show that because of the improved VF-MPDPC,the adjustment time is short,the response is fast,the grid pollution is small,the output bus voltage quality is high,and the power ripple is small when the system is steady; meanwhile,the fluctuation is small,the dynamic response is robust,and the stability is good when the system changes dynamically.
引文
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[9]张帆,刘跃敏,范波,等.基于虚拟磁链三相电压型脉宽调制整流器模型预测直接功率控制[J].电机与控制应用,2016,43(9):25-30.Zhang Fan,Liu Yuemin,Fan Bo,et al.Model predictive direct power control for three-phase voltage source pulse width modulation rectifiers base on virtual flux[J].Electric Machines and Control Application,2016,43(9):25-30.
[10]罗德荣,周小艳,姬小豪,等.基于虚拟磁链的PWM整流器模型预测直接功率控制[J].电力自动化设备,2017,37(12):123-129.Luo Derong,Zhou Xiaoyan,Ji Xiaohao,et al.Virtual-flux-based model predictive direct power control for PWM rectifiers[J].Electric Power Automation Equipment,2017,37(12):123-129.
[11]姬小豪,陈星弢,蒋伟毅,等.虚拟磁链定向的三相电压型PWM整流器模型预测直接功率控制[J].电力系统及其自动化学报,2018,(1):121-126.Ji Xiaohao,Chen Xingwei,Jiang Weiyi,et al.Prediction of direct power control by virtual flux oriented three-phase voltage-type PWM rectifier model[J].Proceedings of the CSU-EPSA,2018,(1):121-126.
[12]罗德荣,周小艳,姬小豪,等.重复控制在模型预测直接功率控制中的应用[J].电力系统及其自动化学报,2018,30(4):35-40.Luo Derong,Zhou Xiaoyan,Ji Xiaohao,et al.Application of repetitive control to model predictive direct power control[J].Proceedings of the CSU-EPSA,2018,30(4):35-40.
[13]宋文斌.基于预测直接功率控制算法的电压型PWM整流器控制系统设计[D].湖南大学,2015.Song Wenbin.Design of voltage type PWM rectifier control system based on predictive direct power control algorithm[D].Hunan University,2015.
[2]罗德荣,姬小豪,黄晟,等.电压型PWM整流器模型预测直接功率控制[J].电网技术,2014,38(11):3109-3114.Luo Derong,Ji Xiaohao,Huang Sheng,et al.Model predictive direct power control for voltage source PWM rectifier[J].Power System Technology,2014,38(11):3109-3114.
[3]柴文野,祝龙记.基于电压定向直接功率控制的光伏并网逆变器[J].电源技术,2012,36(4):527-529.Chai Wenye,Zhu Longji.PV grid-connected inverter based on voltage oriented-direct power control[J].Chinese Journal of Power Sources,2012,36(4):527-529.
[4]何致远,韦巍.基于虚拟磁链的PWM整流器直接功率控制研究[J].浙江大学学报(工学版),2004,38(12):1619-1622.He Zhiyuan,Wei Wei.Research on direct power control of PWM rectifier based on virtual flux[J].Journal of Zhejiang University(Engineering Science),2004,38(12):1619-1622.
[5]王久和.电压型PWM整流器的非线性控制[M].北京:机械工业出版社,2015.
[6]周小艳.三相电压型PWM整流器模型预测直接功率控制的研究[D].湖南大学,2017.Zhou Xiaoyan.Research on model predictive direct power control for three-phase voltage-type PWM rectifier[D].Hunan University,2017.
[7]王宝忠,高文,王波.基于定频SVPWM调制VF-DPC控制策略光伏并网逆变器的研究[J].科学技术与工程,2013,13(30):9047-9051.Wang Baozhong,Gao Wen,Wang Bo.Research based on the fixed frequency SVPWM modulation VF-DPC photovoltaic(pv)grid inverter control strategy[J].Science Technology and Engineering,2013,13(30):9047-9051.
[8]黄守道,黄自翔,黄科元,等.基于虚拟磁链定向的模型预测直接功率控制[J].电力电子技术,2016,50(4):5-8.Huang Shoudao,Huang Zixiang,Huang Keyuan,et al.Model predictive direct power control based on virtual flux[J].Power Electronics,2016,50(4):5-8.
[9]张帆,刘跃敏,范波,等.基于虚拟磁链三相电压型脉宽调制整流器模型预测直接功率控制[J].电机与控制应用,2016,43(9):25-30.Zhang Fan,Liu Yuemin,Fan Bo,et al.Model predictive direct power control for three-phase voltage source pulse width modulation rectifiers base on virtual flux[J].Electric Machines and Control Application,2016,43(9):25-30.
[10]罗德荣,周小艳,姬小豪,等.基于虚拟磁链的PWM整流器模型预测直接功率控制[J].电力自动化设备,2017,37(12):123-129.Luo Derong,Zhou Xiaoyan,Ji Xiaohao,et al.Virtual-flux-based model predictive direct power control for PWM rectifiers[J].Electric Power Automation Equipment,2017,37(12):123-129.
[11]姬小豪,陈星弢,蒋伟毅,等.虚拟磁链定向的三相电压型PWM整流器模型预测直接功率控制[J].电力系统及其自动化学报,2018,(1):121-126.Ji Xiaohao,Chen Xingwei,Jiang Weiyi,et al.Prediction of direct power control by virtual flux oriented three-phase voltage-type PWM rectifier model[J].Proceedings of the CSU-EPSA,2018,(1):121-126.
[12]罗德荣,周小艳,姬小豪,等.重复控制在模型预测直接功率控制中的应用[J].电力系统及其自动化学报,2018,30(4):35-40.Luo Derong,Zhou Xiaoyan,Ji Xiaohao,et al.Application of repetitive control to model predictive direct power control[J].Proceedings of the CSU-EPSA,2018,30(4):35-40.
[13]宋文斌.基于预测直接功率控制算法的电压型PWM整流器控制系统设计[D].湖南大学,2015.Song Wenbin.Design of voltage type PWM rectifier control system based on predictive direct power control algorithm[D].Hunan University,2015.