Waveform separator apparatus and method for detecting leakage current in high voltage direct current power systems

    公开(公告)号:US10804703B2

    公开(公告)日:2020-10-13

    申请号:US15829655

    申请日:2017-12-01

    Abstract: A waveform separator system for determining DC leakage current flowing through an insulating structure in a high voltage direct current power system, wherein the DC leakage current is a composite DC current comprising one or more high magnitude momentary spikes, and having a DC component and an AC component includes: (1) a waveform separator configured to receive the composite DC current flowing through the insulating structure and to separate the composite DC current into corresponding direct current (DC) and alternating current (AC) components wherein the AC component has a first rate of change, and wherein the DC component has a second rate of change, and wherein the first rate of change is greater than the second rate of change; (2) at least one comparator configured to receive the AC component and produce at least one corresponding digital signal; and (3) a processor configured to: (a) receive the at least one corresponding digital signal and the DC component, (b) analyze the at least one corresponding digital signal and the DC component, and; (c) determine a resultant leakage current flowing through the insulating structure.

    APPARATUS FOR MEASURING DC LEAKAGE CURRENT AND METHOD OF USE

    公开(公告)号:US20190257859A1

    公开(公告)日:2019-08-22

    申请号:US16377639

    申请日:2019-04-08

    Abstract: An apparatus and method measures and analyzes DC current passing through a substantially insulating member or dielectric material that is electrically connected to, or otherwise conductive, between an energized DC electrical transmission line and an Earth potential or ground. An apparatus may utilize a DC current measuring device, a DC voltage level selection switch, a DC display, a graphical display of momentary leakage current, and an audio speaker. A process may entail extending a substantially insulating member or dielectric material between an energized DC electrical transmission line and an Earth potential, detecting a DC momentary leakage current, using a DC momentary leakage current meter to measure DC current through the member or material, and a computer to analyze and compare the DC current, and deliver results or a warning that the DC current has reached a threshold value.

    Direct Current Meter and Method of Use
    4.
    发明申请
    Direct Current Meter and Method of Use 审中-公开
    直流电流表和使用方法

    公开(公告)号:US20160356826A1

    公开(公告)日:2016-12-08

    申请号:US15173072

    申请日:2016-06-03

    CPC classification number: G01R19/0092 G01R19/2513 G01R31/085 G01R31/1245

    Abstract: An apparatus and method measures and analyzes DC current passing through a substantially insulating member or dielectric material that is electrically connected to, or otherwise conductive, between an energized DC electrical transmission line and an Earth potential or ground. An apparatus may utilize a DC current measuring device, a DC voltage level selection switch, a DC display, a graphical display of momentary leakage current, and an audio speaker. A process may entail extending a substantially insulating member or dielectric material between an energized DC electrical transmission line and an Earth potential, detecting a DC momentary leakage current, using a DC momentary leakage current meter to measure DC current through the member or material, and a computer to analyze and compare the DC current, and deliver results or a warning that the DC current has reached a threshold value.

    Abstract translation: 一种装置和方法测量和分析通过在通电的DC电传输线路和地电位或地之间电连接或以其他方式导电的基本上绝缘的构件或电介质材料的直流电流。 一种装置可以使用直流电流测量装置,直流电压电平选择开关,直流显示器,瞬时泄漏电流的图形显示和音频扬声器。 一种方法可能需要在通电的DC电传输线路和地电位之间延伸基本绝缘的构件或电介质材料,使用DC瞬时泄漏电流计来检测DC瞬时泄漏电流,以测量通过构件或材料的直流电流,以及 计算机分析和比较直流电流,并提供结果或直流电流达到阈值的警告。

    Apparatus for measuring DC leakage current and method of use

    公开(公告)号:US11016127B2

    公开(公告)日:2021-05-25

    申请号:US16377639

    申请日:2019-04-08

    Abstract: An apparatus and method measures and analyzes DC current passing through a substantially insulating member or dielectric material that is electrically connected to, or otherwise conductive, between an energized DC electrical transmission line and an Earth potential or ground. An apparatus may utilize a DC current measuring device, a DC voltage level selection switch, a DC display, a graphical display of momentary leakage current, and an audio speaker. A process may entail extending a substantially insulating member or dielectric material between an energized DC electrical transmission line and an Earth potential, detecting a DC momentary leakage current, using a DC momentary leakage current meter to measure DC current through the member or material, and a computer to analyze and compare the DC current, and deliver results or a warning that the DC current has reached a threshold value.

    DIRECT CURRENT METER EMPLOYING WAVEFORM SEPARATOR FOR DETECTING LEAKAGE CURRENT

    公开(公告)号:US20180313885A1

    公开(公告)日:2018-11-01

    申请号:US15993961

    申请日:2018-05-31

    Abstract: A system for determining DC leakage current flowing through an electrically insulating structure in a high voltage direct current power system is provided. The DC leakage current is a composite DC current. The insulating structure is operatively coupled to at least an overhead energized DC electrical line. The system further includes a direct current meter adapted to be electrically coupled to at least the insulating structure. The meter includes a waveform separator. The separator is configured to receive and separate the composite DC current into a corresponding direct current (DC) and an alternating current (AC) component. The separator further includes at least one comparator which is configured to produce at least one corresponding digital signal from the AC component; and a processor. The processor receives and analyzes the at least one corresponding digital signal and the DC component to determine a resultant leakage current flowing through the insulating structure.

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