三电平逆变器的改进无模型预测电流控制
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摘要
针对传统模型预测控制对系统模型的依赖性强、鲁棒性差的问题,提出一种应用于三相三电平中性点箝位型(NPC)逆变器的改进无模型预测电流控制方法。该方法利用当前时刻检测的负载电流和上一次计算的电流差分矢量预测下一时刻的输出电流值,其无需任何系统模型参数;通过引入计数因子,及时更新电流差分,并在下一控制周期内应用所选择的使给定代价函数最小的逆变器开关状态,有效地控制负载电流。该算法在一个采样间隔内只需对负载电流进行一次采样,但其运算量大,对系统处理器要求较高。仿真和实验结果表明:所提控制策略具有良好的稳态特性和动态响应速度,且能消除负载参数变化对控制系统稳定性的影响。
Traditional predictive control models are highly dependent on the system model,and suffer from poor robustness. To address these issues,an improved model-free prediction current control method for three-phase three-level NPC(Neutral Point Clamped) inverters is proposed. This method predicts the output current value of the next time by using the load current detected at the present time and the current difference vector calculated in the pre-vious time period,without any system model parameters. The load current is effectively controlled by introducing a counting factor that updates the current difference in time. At the same time,the selected inverter switching state that minimizes the given cost function is applied in the next control period. The proposed method only needs to sample the load current once in one sampling interval,while it has a large amount of calculation and relatively high requirement for the system processor. The simulative and experimental results show that the proposed control strategy exhi-bits satisfactory steady-state characteristics and dynamic response speed,and can eliminate the negative impact of load parameters on the stability of the control system.
Traditional predictive control models are highly dependent on the system model,and suffer from poor robustness. To address these issues,an improved model-free prediction current control method for three-phase three-level NPC(Neutral Point Clamped) inverters is proposed. This method predicts the output current value of the next time by using the load current detected at the present time and the current difference vector calculated in the pre-vious time period,without any system model parameters. The load current is effectively controlled by introducing a counting factor that updates the current difference in time. At the same time,the selected inverter switching state that minimizes the given cost function is applied in the next control period. The proposed method only needs to sample the load current once in one sampling interval,while it has a large amount of calculation and relatively high requirement for the system processor. The simulative and experimental results show that the proposed control strategy exhi-bits satisfactory steady-state characteristics and dynamic response speed,and can eliminate the negative impact of load parameters on the stability of the control system.
引文
[1] RODRIGUEZ J,PONTT J,SILVA C A,et al. Predictive current control of a voltage source inverter[J]. IEEE Transactions on Industrial Electronics,2004,54(1):495-503.
[2] 徐艳平,张保程,周钦. 永磁同步电机双矢量模型预测电流控制[J]. 电工技术学报,2017,32(20):222-230.XU Yanping,ZHANG Baocheng,ZHOU Qin. Two-vector based model predictive current control for permanent magnet synchronous motor[J]. Transactions of China Electrotechnical Society,2017,32(20):222-230.
[3] 张虎,张永昌,杨达维. 基于双矢量模型预测直接功率控制的双馈电机并网及发电[J]. 电工技术学报,2016,31(5):69-76.ZHANG Hu,ZHANG Yongchang,YANG Dawei. Two vectors-based model predictive direct power control of doubly fed induction gene-rator for grid connection and power regulation[J]. Transactions of China Electrotechnical Society,2016,31(5):69-76.
[4] 高逍男,陈希有. 一种改进的永磁同步电机模型预测控制[J]. 电力自动化设备,2017,37(4):197-202.GAO Xiaonan,CHEN Xiyou. Improved model predictive control of permanent magnet synchronous motor[J]. Electric Power Automation Equipment,2017,37(4):197-202.
[5] 张永昌,杨海涛,魏香龙. 基于快速矢量选择的永磁同步电机模型预测控制[J]. 电工技术学报,2016,31(6):66-73.ZHANG Yongchang,YANG Haitao,WEI Xianglong. Model predictive control of permanent magnet synchronous motors based on fast vector selection[J]. Transactions of China Electrotechnical Society,2016,31(6):66-73.
[6] 杨兴武,冀红超,甘伟. 基于模型预测控制的并网逆变器开关损耗优化方法[J]. 电力自动化设备,2015,35(8):84-89.YANG Xingwu,JI Hongchao,GAN Wei. Switching loss optimization based on model predictive control for grid-connected inverter[J]. Electric Power Automation Equipment,2015,35(8):84-89.
[7] 陈强,任浩翰,杨志超,等. 三相并网逆变器改进型直接功率预测控制[J]. 电力自动化设备,2014,34(12):100-105.CHEN Qiang,REN Haohan,YANG Zhichao,et al. Improved predictive direct power control of three-phase grid-connected inverter[J]. Electric Power Automation Equipment,2014,34(12):100-105.
[8] 梁营玉,刘涛,李岩,等. T型三电平VSC-HVDC系统模型预测灵活功率控制策略[J]. 电力自动化设备,2017,37(11):113-119.LIANG Yingyu,LIU Tao,LI Yan,et al. Model predictive flexible power control strategy for T-type three-level converter based on VSC-HVDC[J]. Electric Power Automation Equipment,2017,37(11):113-119.
[9] 沈坤,章兢. 具有建模误差补偿的三相逆变器模型预测控制算法[J]. 电力自动化设备,2013,33(7):86-91.SHEN Kun,ZHANG Jing. Model predictive control scheme with mo-deling error compensation[J]. Electric Power Automation Equipment,2013,33(7):86-91.
[10] 张虎,张永昌,刘家利,等. 基于单次电流采样的永磁同步电机无模型预测电流控制[J]. 电工技术学报,2017,32(2):180-187.ZHANG Hu,ZHANG Yongchang,LIU Jiali,et al. Model-free predictive current control of permanent magnet synchronous motor based on single current sampling[J]. Transactions of China Electrotechnical Society,2017,32(2):180-187.
[11] 王萌,施艳艳,沈明辉,等. 三相电压型PWM整流器模型自校正预测控制[J]. 电工技术学报,2014,29(8):151-157,172.WANG Meng,SHI Yanyan,SHEN Minghui,et al. Predictive control of three-phase voltage source PWM rectifiers based on model self-correction[J]. Transactions of China Electrotechnical Society,2014,29(8):151-157,172.
[12] ANTONIEWICZ P,KAZMIERKOWSKI M P. Virtual-flux-based pre-dictive direct power control of AC/DC converters with online inductance estimation[J]. IEEE Transactions on Industrial Electro-nics,2008,55(12):4381-4390.
[13] XIA Changliang,WANG Meng,SONG Zhanfeng. Robust model predictive current control of three-phase voltage source PWM rectifier with online disturbance observation[J]. IEEE Transactions on Industrial Informatics,2012,8(3):459-471.
[14] LEE K J,PARK B G,KIM R Y. Robust predictive current controller based on a disturbance estimator in three-phase grid-connected inverter[J]. IEEE Transactions on Power Electronics,2012,27(1):276-283.
[15] LIN C K,LIU T H,YU J T,et al. Model-free predictive current control for interior permanent-magnet synchronous motor drives based on current difference detection technique[J]. IEEE Transactions on Industrial Electronics,2014,61(2):667-681.
[16] LAI Y S,LIN C K,CHUANG F P,et al. Model-free predictive current control for three-phase AC/DC converters[J]. IET Electric Power Applications,2017,11(5):729-739.
[2] 徐艳平,张保程,周钦. 永磁同步电机双矢量模型预测电流控制[J]. 电工技术学报,2017,32(20):222-230.XU Yanping,ZHANG Baocheng,ZHOU Qin. Two-vector based model predictive current control for permanent magnet synchronous motor[J]. Transactions of China Electrotechnical Society,2017,32(20):222-230.
[3] 张虎,张永昌,杨达维. 基于双矢量模型预测直接功率控制的双馈电机并网及发电[J]. 电工技术学报,2016,31(5):69-76.ZHANG Hu,ZHANG Yongchang,YANG Dawei. Two vectors-based model predictive direct power control of doubly fed induction gene-rator for grid connection and power regulation[J]. Transactions of China Electrotechnical Society,2016,31(5):69-76.
[4] 高逍男,陈希有. 一种改进的永磁同步电机模型预测控制[J]. 电力自动化设备,2017,37(4):197-202.GAO Xiaonan,CHEN Xiyou. Improved model predictive control of permanent magnet synchronous motor[J]. Electric Power Automation Equipment,2017,37(4):197-202.
[5] 张永昌,杨海涛,魏香龙. 基于快速矢量选择的永磁同步电机模型预测控制[J]. 电工技术学报,2016,31(6):66-73.ZHANG Yongchang,YANG Haitao,WEI Xianglong. Model predictive control of permanent magnet synchronous motors based on fast vector selection[J]. Transactions of China Electrotechnical Society,2016,31(6):66-73.
[6] 杨兴武,冀红超,甘伟. 基于模型预测控制的并网逆变器开关损耗优化方法[J]. 电力自动化设备,2015,35(8):84-89.YANG Xingwu,JI Hongchao,GAN Wei. Switching loss optimization based on model predictive control for grid-connected inverter[J]. Electric Power Automation Equipment,2015,35(8):84-89.
[7] 陈强,任浩翰,杨志超,等. 三相并网逆变器改进型直接功率预测控制[J]. 电力自动化设备,2014,34(12):100-105.CHEN Qiang,REN Haohan,YANG Zhichao,et al. Improved predictive direct power control of three-phase grid-connected inverter[J]. Electric Power Automation Equipment,2014,34(12):100-105.
[8] 梁营玉,刘涛,李岩,等. T型三电平VSC-HVDC系统模型预测灵活功率控制策略[J]. 电力自动化设备,2017,37(11):113-119.LIANG Yingyu,LIU Tao,LI Yan,et al. Model predictive flexible power control strategy for T-type three-level converter based on VSC-HVDC[J]. Electric Power Automation Equipment,2017,37(11):113-119.
[9] 沈坤,章兢. 具有建模误差补偿的三相逆变器模型预测控制算法[J]. 电力自动化设备,2013,33(7):86-91.SHEN Kun,ZHANG Jing. Model predictive control scheme with mo-deling error compensation[J]. Electric Power Automation Equipment,2013,33(7):86-91.
[10] 张虎,张永昌,刘家利,等. 基于单次电流采样的永磁同步电机无模型预测电流控制[J]. 电工技术学报,2017,32(2):180-187.ZHANG Hu,ZHANG Yongchang,LIU Jiali,et al. Model-free predictive current control of permanent magnet synchronous motor based on single current sampling[J]. Transactions of China Electrotechnical Society,2017,32(2):180-187.
[11] 王萌,施艳艳,沈明辉,等. 三相电压型PWM整流器模型自校正预测控制[J]. 电工技术学报,2014,29(8):151-157,172.WANG Meng,SHI Yanyan,SHEN Minghui,et al. Predictive control of three-phase voltage source PWM rectifiers based on model self-correction[J]. Transactions of China Electrotechnical Society,2014,29(8):151-157,172.
[12] ANTONIEWICZ P,KAZMIERKOWSKI M P. Virtual-flux-based pre-dictive direct power control of AC/DC converters with online inductance estimation[J]. IEEE Transactions on Industrial Electro-nics,2008,55(12):4381-4390.
[13] XIA Changliang,WANG Meng,SONG Zhanfeng. Robust model predictive current control of three-phase voltage source PWM rectifier with online disturbance observation[J]. IEEE Transactions on Industrial Informatics,2012,8(3):459-471.
[14] LEE K J,PARK B G,KIM R Y. Robust predictive current controller based on a disturbance estimator in three-phase grid-connected inverter[J]. IEEE Transactions on Power Electronics,2012,27(1):276-283.
[15] LIN C K,LIU T H,YU J T,et al. Model-free predictive current control for interior permanent-magnet synchronous motor drives based on current difference detection technique[J]. IEEE Transactions on Industrial Electronics,2014,61(2):667-681.
[16] LAI Y S,LIN C K,CHUANG F P,et al. Model-free predictive current control for three-phase AC/DC converters[J]. IET Electric Power Applications,2017,11(5):729-739.
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