[关键词]
[摘要]
双馈异步风力发电机在风力市场上所占据的比重越来越大,容量也逐年增大。由于其恶劣的工作环境,使得双馈电机故障频发,其中定、转子匝间短路故障占据很高的比例。根据多回路理论建立了双馈异步电机数学模型,分别模拟了正常情况下以及定子匝间短路时的情况,通过扩展派克矢量变换对定子端电流进行频谱分析和在失电残压的基础上对定子端电压展开分析,最终将得到的特征信息进行故障信息融合诊断。仿真结果表明,将信息融合方法用于电机故障诊断中,提高了其诊断的有效性和准确性。
[Key word]
[Abstract]
Doubly fed induction generators (DFIG) was gradually used in the wind power market, the capacity also increases year by year. Due to poor working conditions of the wind farm, it made DFIG often fail. Stator and rotor windings failure accounted for a large proportion of DFIG fault. A multiloop math model was built for stator winding of DFIG under normal and interturn shortcircuit fault conditions .Based on the extended Park’s vector, the stator terminal current was analyzed by spectrum analysis and the residual voltage after switchoff was analyzed on the residual voltage. The characteristic information was diagnosed by fault information fusion. The simulation results showed that the information fusion method used in motor fault diagnosis, improved the effectiveness of its diagnosis and accuracy.
[中图分类号]
TM 346+.2
[基金项目]
河北省自然科学基金资助项目(2014502015)