Abstract：The model predictive direct power control (MPDPC) is attracting wide attentions in the control of grid-connected converters due to the merits of simple principle,fast response,and flexible control aims.It uses the system model to predict the future value of active/reactive power and obtains the best voltage vector minimizing the power errors by enumeration.Compared to the conventional switching table based direct power control (DPC),MDPPC features better steady and dynamic performance.To further improve the steady state performance and reduce the sampling frequency,this paper proposes a two-vectors-based MPDPC by allocating one non-zero vector and one null vector during one control period.The power ripples are significantly reduced by optimizing the duration of the non-zero vector.Lower switching frequency with better steady state performance can be obtained by arranging the vector sequence in a more reasonable way.Simulation results from a 15 kW doubly fed induction generator (DFIG) system indicate that,compared to the conventional MPDPC,the proposed two-vectors-based MPDPC,with low sampling frequency,can achieve fast and smooth grid synchronization,flexible regulation of active/reactive power,and lower switching frequency.Hence,it is very practical for real applications.
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 Generator for Grid Connection and Power Regulation. Transactions of China Electrotechnical Society, 2016, 31(5): 69-76.
[1] Li H,Chen Z.Overview of different wind generator systems and their comparisons[J].IET Renewable Power Generation,2008,2(2):123-138. [2] 杨睿茜,陈红坤,陶玉波,等.双馈式风机控制器参数整定的实用方法[J].电力系统保护与控制,2015,43(2):63-69. Yang Ruixi,Chen Hongkun,Tao Yubo,et al.A practical method on doubly-fed induction generator controller parameter determination[J].Power System Protection and Control,2015,43(2):63-69. [3] 严干贵,侯延鹏,王健,等.抑制超速脱网的双馈感应风电机组低电压穿越控制策略研究[J].电工技术学报,2015,30(23):146-154. Yan Gangui,Hou Yanpeng,Wang Jian,et al.A DFIG wind turbine low-voltage ride-through control strategy restraining over-speed-tripping-off from grid[J].Transactions of China Electrotechnical Society,2015,30(23):146-154. [4] Buja G S,Kazmierkowski M P.Direct torque control of PWM inverter-fed AC motors—a survey[J].IEEE Transaction on Industry Electronics,2004,51(4):744-757. [5] Arnalte S,Burgos J C,Rodriguez Amenedo J L.Direct torque control of a doubly-fed induction generator for variable speed wind turbines[J].Electric Power Components and System,2002,30(2):199-216. [6] 孙丹,方扬,孙士涛,等.双馈异步风力发电机无差拍直接功率控制及延时补偿[J].电工技术学报,2013,28(11):70-77. Sun Dan,Fang Yang,Sun Shitao,et al.Dead-beat direct power control of doubly fed induction generators with delay compensation[J].Transactions of China Electrotechnical Society,2013,28(11):70-77. [7] Datta R,Ranganathan V T.Direct power control of grid-connected wound rotor induction machine without rotor position sensors[J].IEEE Transactions on Power Electronics,2001,16(3):390-399. [8] Cortes P,Kazmierkowski M,Kennel R,et al.Predictive control in power electronics and drives[J].IEEE Transactions on Industry Electronics,2008,55(12):4312-4324. [9] Zhang Y,Zhu J,Hu J.Model predictive direct torque control for grid synchronization of doubly fed induction generator[C]//Proceedings of IEEE Int.Electric Machines and Drives Conference,IEMDC ’11,Toront,Canada,2011:775-780. [10]战亮宇,金新民,张禄.双馈电机复功率特性研究及四维分析[J].电工技术学报,2012,27(1):131-135. Zhan Liangyu,Jin Xinmin,Zhang Lu.Complex power characteristics of doubly-fed induction machine and its four dimesion analysis[J].Transactions of China Electrotechnical Society,2012,27(1):131-135. [11]Zhang Y,Hu J,Zhu J.Three-vectors-based predictive direct power control of the doubly fed induction generator for wind energy applications[J].IEEE Transactions on Power Electronics,2014,29(7):3485-3500. [12]Zhang Y,Li Z,Xie W.Grid synchronization of DFIG using model predictive direct power control[C]//Electrical Machines and Systems(ICEMS),Beijing,2011. [13]Zhang Y,Li Z.Predictive direct torque and flux control of doubly fed induction generator with switching frequency reduction for wind energy applications[C]//Electrical Machines and Systems (ICEMS),Beijing,2011. [14]Zhang Y,Xie W,Li Z.Model predictive direct power control of a PWM rectifier with duty cycle optimization[J].IEEE Transactions on Power Electronics,2013,28(11):5343-5351.
2016, Vol. 31 
