摘要
对电网电压发生跌落故障时双馈感应电机(DFIG)定、转子的电磁暂态过程进行了深入分析和讨论,并针对故障时转子端过电压主要由定子磁链暂态直流分量引起这一机理。基于电网电压故障期间暂态磁链的特征,采用了一种暂态磁链补偿算法,通过在转子侧适时准确地注入暂态补偿量,有效地提高了机组低电压穿越(LVRT)过程中的可控性。改善了双馈机组LVRT性能。11 kW模拟机组的实验验证了分析和设计。
Doubly fed induction generator（DFIG） electromagnetic transient process during the voltage fault is analyzed and discussed,from which it is found that the transient high rotor voltage is mainly caused by the DC components complied in the stator flux.A novel compensation algorithm based on characteristic of transient stator flux is proposed.By the algorithm that injects the transient compensation into the rotor circuit timely and exactly,the controllablilty of wind turbine in low voltage ride through（LVRT） process is improved,and the LVRT performance of DFIG is also improved.The analysis and design are validated with the experimental results of the 11 kW simulated wind turbine.
出处
《电力电子技术》
CSCD
北大核心
2014年第5期4-7,共4页
Power Electronics
基金
国家自然科学基金(51107025)~~
关键词
双馈感应电机
暂态补偿
低电压穿越
doubly fed induction generator
transient compensation
low voltage ride through
