摘要
定子绕组匝间短路是双馈异步发电机常见故障之一,对其短路特征量进行分析具有一定的现实意义。Prony算法是一种精确的信号分析方法。相较传统的FFT算法,Prony具有更高的精度和更快的运算速度,可以精确检测到故障信号的相位、振幅、频率和衰减因子,并解决了FFT的弊端。为了减小FFT频谱泄露和栅栏现象的影响,采用与差分算法相结合的Prony算法,可以提高双馈异步发电机定子绕组匝间短路故障信号分析的精度。
The stator winding inter-turn short circuit fault is one of the common faults of the doubly-fed induction generator（DFIG） , and the analysis of the characteristics had practical significance. Prony algorithm was an accurate signal analysis method. Compared with the traditional FFT algorithm, Prony had higher accuracy and faster computing speed. It could accurately detect the phase, amplitude, frequency and attenuation factor of the fault signal, and solve the drawbacks of FFT algorithm. In order to reduce the effect of spectrum leakage and fence effect of FFT, the Prony algorithm was used to improve the accuracy of the signal analysis of the stator winding inter-turn short circuit fault in doubly-fed induction generator.
出处
《电机与控制应用》
北大核心
2016年第7期86-91,共6页
Electric machines & control application
基金
河北省自然科学基金资助项目(2014502015)
关键词
双馈异步发电机
定子匝间短路
PRONY算法
信号分析
doubly-fed induction generator
inter.turn short circuit fault
prony algorithm
signal analysis
