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1. 发明授权

US5642038A Method of detecting partial discharge using frequency spectrum analyzer 失效
标题翻译：使用频谱分析仪检测局部放电的方法
公开(公告)号：US5642038A
公开(公告)日：1997-06-24
申请号：US573418
申请日：1995-12-15
申请人： Taek-Soo Kim , Myong-Soo Park , Yong-Joo Kim , Jin-Bong Kim , Don-Ha Hwang
发明人： Taek-Soo Kim , Myong-Soo Park , Yong-Joo Kim , Jin-Bong Kim , Don-Ha Hwang
IPC分类号： G01R31/02 , G01R29/00 , G01R31/12 , G01R19/00
CPC分类号： G01R31/12
摘要： A method of detecting a partial discharge signals occurring at an insulator, using a Frequency Spectrum Analyzer (FSA) with a monitor screen. The method including the steps of setting a horizontal axis of the monitor screen as a time axis and a vertical axis as an axis representing a voltage magnitude; receiving a power frequency signal having phase angle and carrying the partial discharge signals derived from the insulator being tested, to display the magnitudes of the partial discharge signals based on the time axis; detecting each of the maximum value of the partial discharge signals being displayed by the receiving step, to cause them to be evaluated into coordinate values of the horizontal axis and the vertical axis discriminating each of the phase angles of the power frequency signal based on the coordinate value of the horizontal axis detected by the detecting step, and evaluating each of the magnitudes of the partial discharge signals positioned at respective phase angles of the power frequency signal based on the coordinate value of the vertical axis; and overlapping each the phase angle of the partial discharge signals positioned at the respective phase angles evaluated by the discriminating step with each other according to corresponding phase angles, and comparing them relative to each other, such that the magnitude and number of the partial discharge signals appearing at the respective phase angles of the power frequency signal can be evaluated.
摘要翻译：使用具有监视器屏幕的频谱分析仪（FSA）来检测在绝缘体处发生的局部放电信号的方法。该方法包括以下步骤：将监视器画面的水平轴设置为时间轴，将垂直轴设置为表示电压大小的轴; 接收具有相位角的电力频率信号并承载从被测绝缘体导出的局部放电信号，以基于时间轴显示局部放电信号的幅度; 检测由接收步骤显示的局部放电信号的最大值中的每一个，以使它们被评估为基于坐标的电力频率信号的每个相位角的水平轴和垂直轴的坐标值由所述检测步骤检测的水平轴的值，并且基于所述垂直轴的坐标值来评估位于所述功率频率信号的各个相位角的所述局部放电信号的大小; 并且根据相应的相位角将位于由识别步骤评估的各个相位角的局部放电信号的相位角重叠，并将它们相对于彼此进行比较，使得局部放电信号的幅度和数量可以评估在电力频率信号的各个相位角处的出现。

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