In order to accurately detect the beginning and end time of transient fluctuation,the voltage signal is decomposed into intrinsic mode function(IMF) elements by EMD,and then,their Hilbert spectrum are calculated.
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- 應用研究表明,對暫態(tài)閃變信號進(jìn)行EMD分解,再對得到的各IMF分量求HHT譜,可以精確地檢測到暫態(tài)電壓波動(dòng)發(fā)生的時(shí)刻和終止的時(shí)刻;
