摘要
为了解决双馈变频器低电压穿越期间定子磁链中暂态直流分量对电磁转矩的影响,以及触发转子过流保护动作,提出一种基于全阶状态观测器定子磁链观测的低穿灭磁控制方法,并对其进行了仿真验证。仿真结果表明,全阶状态观测器法观测的定子磁链都能与真实值高度吻合;全阶状态观测器法磁链观测对电机参数具有很好的鲁棒性;基于全阶状态观测器法磁链观测的灭磁控制方法效果显著,通过有效的灭磁控制,可显著改善双馈变频器的低穿性能。
In order to solve electromagnetic torque vibration caused by transient DC component of the stator flux during DFIG LVRT and trigger of rotor overcurrent protection action,a new LVRT de-excitation control method was proposed and simulated based on stator flux observation by full-order state observer method.The simulation results show that:the stator flux observed by the full-order observer method is highly consistent with the true value;the stator flux observed by the full-order observer method has good robustness to the motor parameters variation;it has significant effect of demagnetizing control method based on stator flux observed by full-order state observer,the DFIG LVRT performance can be significantly improved by way of effective de-excitation.
作者
王维娜
WANG Weina(Department of Electrical and Mechanical Engineering,Hetao College,Bayannur 015000,Nei Monggol,China)
出处
《电气传动》
北大核心
2018年第11期71-74,共4页
Electric Drive
基金
河套学院科学研究项目(HYZQ201404)
关键词
双馈变频器
低电压穿越
全阶状态观测器
磁链观测
灭磁控制
doubly-fed induction generator(DFIG)converter
low voltage ride-through(LVRT)
full-order state observer
flux observer
de-excitation control
