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- W2057384020 abstract "High voltage power equipment have to be designed to withstand a standard lightning impulse voltage of a specified value as a type test for certification. In case of partial or complete failure of the insulation of the equipment, the shape of lightning impulse undergoes a change. In order to compute the time/frequency characteristics of such impulse voltage,the wavelet transform technique has been used. The standard, chopped and modified impulse voltages have been generated using a computer program. The various voltage/time magnitudes have been used for determination of time/frequency characteristics for a number of dilation coefficients 'a.' The values such obtained are normalized and typical values are plotted, to show the specific differences. It is inferred that there exists a threshold value of dilation constant, bellow which perturbations in the voltage waveshape/time becomes difficult to detect. The paper deals with the limitations of such method and the lowest value of dilation coefficient to be considered for the use in such analysis.© (2001) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only." @default.
- W2057384020 created "2016-06-24" @default.
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- W2057384020 date "2001-03-26" @default.
- W2057384020 modified "2023-09-26" @default.
- W2057384020 title "<title>Response of chopped and modified impulse voltages to the Mexican Hat wavelet for various dilation and translation coefficients</title>" @default.
- W2057384020 doi "https://doi.org/10.1117/12.421190" @default.
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