Method and system for measuring partial discharge
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United States of America Patent
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Aug 14, 2007
Grant Date -
Apr 6, 2006
app pub date -
Dec 6, 2005
filing date -
Feb 20, 2004
priority date (Note) -
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Abstract
In the measurement of partial discharge, a voltage detected by an antenna is input to a spectrum analyzer and a phase difference between an operating voltage and a power supply of the spectrum analyzer is obtained by phase domain analysis using the spectrum analyzer. Based on the phase difference and the voltage phase shift associated with the input impedance of a signal converter circuit, the time axis displayed on the screen of the spectrum analyzer is compensated. After the compensation has been carried out, the voltage detected by the antenna is input into the spectrum analyzer and the partial discharge pattern which synchronizes with the operating voltage is measured by phase domain analysis using the spectrum analyzer.
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