Abstract：A general mathematical model for the double fed induction generator (DFIG) is presented based on power control in the two-phase static coordinate,which is suitable for either balanced or unbalanced grid voltage condition.Direct power control based on sliding-mode control is used to realize the control of DFIG’s rotor-side converter.The controller has advantages of simple structure,rapid response,and high robustness.A novel optimization control strategy is proposed for compensating power under unbalanced grid voltage conditions.The proposed control strategy is implemented by directly increasing power compensation to the power reference value,which eliminates the sequence component extraction of the stator and rotor currents.Therefore the control structure is simplified.More importantly,the proposed control algorithm can reduce the influence of the stator current disturbance on the power compensation,thus improves system robustness.Simulation and experiment results confirm the reliability and validity of the proposed control strategy.
张迪,魏艳君,杨宗丰,丁浩,漆汉宏. 不平衡电网电压下基于滑模变结构控制的双馈风电系统转子侧变流器控制策略[J]. 电工技术学报, 2016, 31(17): 121-131.
Zhang Di Wei ,Yanjun, Yang Zongfeng ,Ding Hao ,Qi Hanhong. Sliding-Mode Control for Rotor-Side Converters of DFIG-Based Wind-Power Generation System Under Unbalanced Grid Voltage Conditions. Transactions of China Electrotechnical Society, 2016, 31(17): 121-131.
[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] Pena R,Cardenas R,Alepuz G,et al.Overview of control systems for the operation of DFIGs in wind energy applications[J].IEEE Transactions on Industrial Electronics,2013,60(7):2776-2798. [3] 赵霞,王倩,邵彬,等.双馈感应风力发电系统低电压穿越控制策略研究及其分析[J].电力系统保护与控制,2015,43(16):57-64. Zhao Xia,Wang Qian,Shao Bin,et al.Low voltage ride through control strategy and its analysis of doubly fed induction generator generator[J].Power System Protection and Control,2015,43(16):57-64. [4] 贺益康,胡家兵,徐烈.并网双馈异步风力发电机运行控制[M].北京:中国电力出版社,2012. [5] Hu Jiabing,He Yikang,Xu Lie,et al.Improved control of DFIG systems during network unbalance using PI-R current regulators[J].IEEE Transactions on Industrial Electronics,2009,56(2):439-451. [6] 叶虹志,姜燕,黄守道,等.电压型PWM整流器无差拍预测直接功率控制[J].电工技术学报,2015,30(4):121-128. Ye Hongzhi,Jiang Yan,Huang Shoudao,et al.Deadbeat predictive direct power control for three-phase voltage source PWM rectifiers[J].Transactions of China Electrotechnical Society,2015,30(4):121-128. [7] 周小杰,张霞,汪飞.基于功率变化子空间的直接功率控制[J].电工技术学报,2015,30(24):142-151. Zhou Xiaojie,Zhang Xia,Wang Fei.Direct power control based on subspace of power variation[J].Transactions of China Electrotechnical Society,2015,30(24):142-151. [8] 郭三明,孙鹏荆,敬树仁,等.基于预测模型的STATCOM功率控制策略建模与仿真[J].电力系统保护与控制,2015,43(1):88-92. Guo Sanming,Sun Pengjing,Jing Shuren,et al.Research on modeling and simulation of power control method for STATCOM based on predictive model[J].Power System Protection and Control,2015,43(1):88-92. [9] Abad G,Rodriguez M A,Iwanski G,et al.Direct power control of doubly-fed-induction-generator-based wind turbines under unbalanced grid voltage[J].IEEE Transactions on Power Electronics,2010,25(2):442-452. [10]Hu Jiabing,Nian Heng,Hu Bin,et al.Direct active and reactive power regulation of DFIG using sliding-mode control approach[J].IEEE Transactions on Energy Conversion,2010,25(4):1028-1039. [11]Nian Heng,Song Yipeng,Zhou Peng,et al.Improved direct power control of a wind turbine driven doubly fed induction generator during transient grid voltage unbalance[J].IEEE Transactions on Energy Conversion,2011,26(3):976-986. [12]Martinez M I,Tapia G,Susperregui A,et al.Sliding-mode control for DFIG rotor-and grid-side converters under unbalanced and harmonically distorted grid voltage[J].IEEE Transactions on Energy Conversion,2012,27(2):328-338. [13]Martinez M I,Susperregui A,Tapia G,et al.Sliding-mode control of a wind turbine-driven double-fed induction generator under non-ideal grid voltages[J].IET Renewable Power Generation,2013,7(4):370-379. [14]Shang Lei,Hu Jiabing.Sliding-mode-based direct power control of grid-connected wind-turbine-driven doubly fed induction generators under unbalanced grid voltage conditions[J].IEEE Transactions on Energy Conversion,2012,27(2):362-373. [15]张迪,魏艳君,马利轩,等.不平衡电网电压下基于滑模变结构控制的双馈风电系统网侧变流器控制策略[J].电工技术学报,2015,30(10):266-275. Zhang Di,Wei Yanjun,Ma Lixuan,et al.Sliding-mode control for grid-side converters of DFIG-based wind-power generation system under unbalanced grid voltage conditions[J].Transactions of China Electrotechnical Society,2015,30(10):266-275.
2016, Vol. 31 
