Auxiliary detection device for partial discharge signals of high-voltage switch cabinet
A high-voltage switchgear and discharge signal technology, which is applied in the field of electrical signal sensing, can solve the problems of unable to continuously detect partial discharge signals in real time, and cannot truly reflect the partial discharge level of equipment in operation, so as to increase the creepage distance of external insulation and improve the efficiency of operation. maintenance level and improve operational reliability
Inactive Publication Date: 2018-08-21
国网陕西省电力公司西安供电公司
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From this point of view, the traditional pulse current method also has the disadvantage of not being able to detect PD signals in real time and continuously, and cannot truly reflect the actual PD level of the equipment in operation.
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[0018] As shown in the figure, an auxiliary detection device for partial discharge signals of a high-voltage switchgear, an auxiliary detection device for partial discharge signals of a high-voltage switchgear, includes an insulating casting body 8 and a sensing device arranged inside the insulating casting body, and the insulating casting The two ends of the body 8 are respectively provided with an upper insert 801 and a lower insert 802 made of copper. The upper insert 801 is connected to the perforated bus bar through nuts, and the lower insert 802 is connected to the perforated cabinet body connected to the earth. The frame is connected, and the insulating casting body 8 is made of epoxy resin material with high strength and high insulation performance, and a plurality of creepage skirts are arranged along its length direction to increase the creepage distance of its outer insulation.
[0019] The sensing device includes a signal input terminal 1, a capacitive coupling modu...
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The invention relates to an auxiliary detection device for the partial discharge signals of a high-voltage switch cabinet. The device comprises an insulating casting body and a sensing device disposedinside the insulating casting body; two ends of the insulating casting body are respectively provided with an upper insert and a lower insert which are made of copper, wherein the upper insert is fixedly connected with a bus bar, and the lower insert is fixedly connected with a cabinet frame connected to the ground; the sensing device comprises a signal input end, a capacitive coupling module, adetection impedance module, an overvoltage protection module, a signal output end, a ground blocking capacitor-resistor module and a grounding end; and the sensing device is fixedly installed inside acabinet body, and can couple the partial discharge signals in real time and continuously with high sensitivity. The device can synchronously couple a small amount of power frequency quantity which isused for equipment electrification indication and blocking control.
Description
technical field [0001] The invention relates to the technical field of electrical signal sensing, in particular to an auxiliary detection device for partial discharge signals of a high-voltage switch cabinet. Background technique [0002] At present, the detection methods and means of partial discharge of high-voltage switchgear can be roughly classified into two categories: non-electrical measurement method and electrical measurement method. Non-electrical measurement methods are mainly based on secondary phenomena such as sound, light, heat, and the generation of new chemical components during the partial discharge process, resulting in detection methods such as ultrasonic waves, infrared thermal imaging, and gas chromatography analysis. The above methods play an indispensable role in the partial discharge detection of high-voltage switchgear within a certain application range, but the non-electrical information used determines the inevitability of the problem, such as the...
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CPCG01R31/12
Inventor 刘勇王琨张伟赵红庆杨波杜鸣凯曹畅姚强赵辉
Owner 国网陕西省电力公司西安供电公司