摘要
小波变换理论在时域和频域的局部化性质,使之能有效地检测信号的奇异性。文章分析了电力系统故障暂态信号的奇异性,得出其奇异的特殊性,即具有不确定的奇异度,从而提出用小波变换进行奇异检测时对所用小波函数的要求,确保奇异性的准确检出,并给出了故障时刻检测的仿真。
Minor abstract wave alternation theory strange making that can check a signal effectively in time domain and localization frequency region character. The articlehas analysed momentary state of electric system malfunction signal strange, has reached whose strange particularity, has been to have uncertain strange degrees, has brought forward to the request minor wave fimction to what be used varying with minor wave when carrying out strange detecting thereby, emulation ensures that strange accuracy has been checked out, and has given a malfunction out moment detecting.
出处
《齐齐哈尔大学学报（自然科学版）》
2008年第3期17-20,共4页
Journal of Qiqihar University(Natural Science Edition)
关键词
小波变换
电力系统故障暂态信号
奇异度
minor wave varies
momentary state of electric system malfunction signal
strange degree
