Device for measuring partial discharge in gas-insulated high voltage facilities, the device having a HF sensor and UHF sensor
First Claim
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1. A device for measuring a partial discharge in a gas-insulated high voltage facility, comprising:
- a first calibratable sensor for measuring a high-frequency (HF) signal component in an HF range;
a second sensor for detecting an ultra-high frequency (UHF) signal component characteristic of a partial discharge;
a metal enclosure, the first sensor and the second sensor being arranged in the metal enclosure;
a first branch coupled to the first sensor for processing the HF signal component;
a second branch coupled to the second sensor for processing the UHF signal component; and
a gate device coupled to the first sensor and second sensor, the gate device being actuated when the UHF signal component characteristic of a partial discharge is sensed, wherein when the gate device is actuated, the gate device allows the HF signal component to pass through for further processing.
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Abstract
To perform a reliable and calibrated measurement of partial discharges, a first calibratable sensor and a second sensor are arranged in a metal enclosure. The first calibrated sensor picks up signal components in the HF (High Frequency) range, and the second non-calibrated sensor picks up signal components in the UHF (Ultra-High Frequency) range. An HF signal component picked up by the first sensor is transmitted to a partial discharge analyzer. The opening time of the gate device is determined by a UHF signal component picked up by the second sensor.
23 Citations
6 Claims
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1. A device for measuring a partial discharge in a gas-insulated high voltage facility, comprising:
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a first calibratable sensor for measuring a high-frequency (HF) signal component in an HF range;
a second sensor for detecting an ultra-high frequency (UHF) signal component characteristic of a partial discharge;
a metal enclosure, the first sensor and the second sensor being arranged in the metal enclosure;
a first branch coupled to the first sensor for processing the HF signal component;
a second branch coupled to the second sensor for processing the UHF signal component; and
a gate device coupled to the first sensor and second sensor, the gate device being actuated when the UHF signal component characteristic of a partial discharge is sensed, wherein when the gate device is actuated, the gate device allows the HF signal component to pass through for further processing. - View Dependent Claims (2, 3, 4, 5)
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6. A method of calibratable measurement of a partial discharge in a gas-insulated switchgear, comprising:
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picking up a UHF signal component and an HF signal component within an enclosure;
if the UHF signal component exceeds a predetermined threshold, actuating a gate element; and
after actuating the gate element, transmitting the HF signal component for further processing.
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Specification
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Current AssigneeSiemens AG
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Original AssigneeSiemens AG
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InventorsHucker, Thomas
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Primary Examiner(s)Brown, Glenn W.
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Assistant Examiner(s)Hamdan, Wasseem H.
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Application NumberUS09/463,763Time in Patent Office377 DaysField of Search324/122, 324/551, 324/536, 250/206.1, 370/540US Class Current324/122CPC Class CodesG01R 31/1254 of gas-insulated power appl...
