摘要
本文提出一种交流励磁机旋转整流器故障检测的新方法。首先通过采样一保持和A/D转换,得到交流励磁机中检测线圈感应电势波形的离散数值。然后进行快速付里叶变换,计算感应电势波形的幅频特性作为模式识别的特征提取。最后按近邻法设计出分类器。数字仿真计算表明,这种新方法能准确地识别和检测交流励磁机旋转整流器的各类故障。
A microprocessor-based fault monitor for rotating of brushless ac exciters using a pattern-recognition approach is presented in this paper. The features of the frequency spectrum of the voltage waveform induced in a search coil placed in the stator slots of the brushless ac exciter are used in pattern recognition. Based on these features a classifier is designed using the nearest-neighbour rules. A prototype of the microprocessor - based fault monitor has been built. Studies show that the fault monitor can accurately recognize the various classes of the rotating rectifier of the brushless ac exciter.
出处
《电力系统自动化》
EI
CSCD
北大核心
1993年第8期39-43,共5页
Automation of Electric Power Systems
关键词
交流励磁机
整流器
故障
检测
Faults, Rotating Rectifiers, Brushless AC Exciters, Pattern Recognition, Microprocessor -based Monitor
