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Frequency-Time Analysis(Partition-FFT) for Tracking Detection  

Jee S. W. (영남대 전기공학과)
Lee S. H. (영남대 전기공학과)
Kim Ch. N. ((주)인터커넥션)
Lee C. H. (호서대 환경안전공학부)
Lee K. S. (영남대 전자정보공학부)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers C / v.53, no.10, 2004 , pp. 530-538 More about this Journal
Abstract
A electromagnetic waves are used for sensing in insulation diagnosis at electric machine or equipment. When it a method, waves are transformed into the FFT(Fast Fourier Transform); a kind of the process for data transformation. In a general way, a scientist use frequncy band 30[㎒]～l[㎓] to applied field. If we are measured high frequency band, we will need to a high capacity hardware. Also a antenna has a fault on atmospheric phenomena, outside environment and the like. In this paper We proposed new method for detecting electric equipment faulty state using only electric voltage which is generally measured in the electric and electronic field. It is called the Partition-FFT The analytic method is this first divide measured voltage waves into equal parts, second each deal with give effect to the FFT, finally each results deal with a graphic method and gather graphic. We are compare Partition-FFT with discharge form by tracking tester. As the result it demonstrated that the Partition-FFT is applicable.
Keywords
FFT; Partion-FFT; Tracking Breakdown; Tracking Tester;
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