不对称电网故障下DFIG机侧变流器控制研究  

Research on the Control of Rotor-Side Converter of Doubly-Fed Induction Generator under Asymmetric Power Grid

作　　者：郭子雷[1] 张海燕[1] 秦臻[1] 徐强[1] 

机构地区：[1]上海电机学院电气学院,上海200240

出　　处：《电器与能效管理技术》2016年第2期40-43,58,共5页Electrical & Energy Management Technology

摘　　要：通过分析DFIG机侧变流器系统在不对称电网故障下的运行特性,提出了基于改进PR(比例谐振控制)的DFIG机侧变流器控制策略。通过改进的PR控制器不仅可以有效地减小故障电压产生的负序分量的影响,还能针对特定谐波进行谐波抑制,从而使DFIG机侧变流器在不对称电网故障下能够稳定运行,增强了DFIG机侧变流器的稳定性和可靠性。使用MATLAB/Simulink搭建仿真模型并进行仿真研究。经试验验证,这种控制策略能够有效地消除转子电流谐波分量,抑制定子电流不平衡,能够使DFIG系统在不平衡电压下良好运行。This article analyzed the operating characteristics of rotor-side converter of DFIG under asymmetric power grid failure and proposed one control strategy which is based on the improved PR （ proportional resonant） control of the rotor-side converter of DFIG. By using the improved PR controller, the negative components of the fault voltage can be effectively reduced, and the specific harmonics are effectively suppressed. Then the rotor-side converter of DFIG can operate stably under asymmetric power grid. And the reliability of this system is enhanced. Simulation model of Matlab/Simulink was built and studied. It was verified that this control strategy can effectively eliminate the harmonic component of rotor current and suppress the stator current imbalance so that DFIG system can be running stably and reliably.

关 键 词：不对称电网故障 改进的比例谐振控制 负序分量 谐波抑制 

分 类 号：TM46[电气工程—电器]