【摘要】 无刷励磁系统故障很可能导致严重的损失。文中利用系统辨识技术进行在线监测 ,以确定是否发生了故障 ;同时用频谱分析、数字滤波和小波包技术进行故障筛选 ,提取特征信号 ,从而可以基本判定故障的类型和大致部位 ,及时为运行人员提供信息。算例证明了综合测辨法的有效性更多还原

【Abstract】 The failure of brushless excitation system could cause a great loss,but for som e reasons it is very difficult to distinguish it.This paper presents an integrated identification method to resolve this problem.Combining with the real production status,it uses system identification method to m onitor online,applies the frequency spectrum analysis,digital filter and wavelet packetanalysis to distinguish the kind of failure and to obtain the character inform ation.So the type and the location of failure can be determ ined via com paring the information.The described m ethod has been tested in a practical power system and som e interesting results have been dem onstrated.更多还原