基于Duffing系统与APES算法的DFIG定子匝间故障检测新方法

Novel method based on Duffing system and APES algorithm for stator winding inter-turn fault detection of DFIG

简要介绍了Duffing振子信号检测和幅度相位估计(APES)算法的原理,提出将Duffing振子信号检测与APES算法相结合的双馈感应风力发电机(DFIG)定子匝间故障检测新方法。利用Duffing振子参数敏感性及对背景噪声的强免疫性,根据相轨迹图变化判断是否存在待测故障特征,在此基础上结合APES算法确定故障特征的振幅,弥补了Duffing振子无法提供准确幅值的不足。仿真结果证明了所提方法的实用性和有效性。

The principles of Duffing oscillator signal detection and APES(Amplitude Phase EStimation) algorithm are briefly introduced. A novel method combining Duffing oscillator signal detection and APES algorithm is proposed for detecting stator winding inter-turn fault of DFIG(Doubly-Fed Induction Generator). Based on the sensitivity of Duffing oscillator parameters and the strong immunity to background noise, the presence of fault features to be mea-sured is detected according to the phase map change, based on which, the APES algorithm is used to determine the amplitude of fault features to make up for the inadequacy that Duffing oscillator can not provide accurate amplitude. The simulative results show that the proposed method is practicable and effective.