CN209373040U - High-tension switch cabinet partial discharge monitors compound transducer - Google Patents

High-tension switch cabinet partial discharge monitors compound transducer Download PDF

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Publication number
CN209373040U
CN209373040U CN201920008141.6U CN201920008141U CN209373040U CN 209373040 U CN209373040 U CN 209373040U CN 201920008141 U CN201920008141 U CN 201920008141U CN 209373040 U CN209373040 U CN 209373040U
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signal
poly
silica gel
partial discharge
shield shell
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CN201920008141.6U
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Chinese (zh)
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何平
金春雷
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Baoding Tianwei Xinyu Technology Development Co Ltd
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Baoding Tianwei Xinyu Technology Development Co Ltd
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Abstract

The utility model relates to high-tension switch cabinet partial discharges to monitor compound transducer comprising shield shell is arranged on shield shell and for the signal output interface of external partial discharge detection equipment, the poly- wave cover of silica gel being mounted on shield shell upper surface, the ultrasonic reception sensor for received ultrasonic signal, the reception RF receiving coil for radiofrequency signal, the floor being arranged on shield shell lower end surface and the TEV coupling circuit plate for being mounted on shield shell and be located at below floor and be used to receive TEV signal;The inner concave for receiving signal is provided on the poly- wave cover of silica gel;Ultrasonic reception sensor is arranged at silica gel poly- wave cover center and is located at inner concave focal point;RF receiving coil is embedded in the poly- wave cover of silica gel and is arranged concentrically with inner concave.It is the utility model is designed reasonably, compact-sized and easy to use.

Description

High-tension switch cabinet partial discharge monitors compound transducer
Technical field
The utility model relates to high-tension switch cabinet partial discharges to monitor compound transducer, especially suitable for high-tension switch cabinet part Discharge the sensor monitored, the method monitored using transient earth voltage (TEV), ultrasonic wave and wide band radio-frequency, and realization presses off height Close the monitoring of cabinet shelf depreciation.Its main feature is that three kinds of sensor integrations are all over the body, small in size, detection sensitivity is high, anti-interference ability By force, reliable performance.
Background technique
For switchgear in occupation of highly important status in power supply-distribution system, operational reliability directly affects power industry Normal production.But these equipment are in operation, due to inevitably by various factors such as electricity, heat, mechanical and environment Influence, dielectric constantly deteriorates, and keeps operating status bad, or even various failures occur, causes part or even large area Have a power failure, causes huge directly or indirectly economic loss and social influence.All kinds of insulation defects develop to final breakdown and lead to thing Therefore before, the shelf depreciation stage is often first passed through, the degree of strength of shelf depreciation can reflect the current insulation shape of equipment in time State, therefore can effectively prevent and diagnose switchgear insulation fault by the real-time monitoring of shelf depreciation.
Traditional sensor monitoring accuracy is low, and accuracy is poor, is easy to produce and fails to report.It is monitored, is needed using acoustoelectric combined method Two kinds of sensors are installed simultaneously, increase manpower and material resources, occupy larger space, and not can guarantee precision.For background technique The middle problem needs a kind of collection ultrasonic sensor, and TEV sensor and wide band radio-frequency are, small in size, high sensitivity, Highly reliable sensor.
Utility model content
It is compound that technical problem to be solved in the utility model is generally speaking to provide a kind of high-tension switch cabinet partial discharge monitoring Formula sensor;The technical issues of solving in detail and acquirement beneficial effect in aftermentioned content and combine in specific embodiment Hold and specifically describes.
To solve the above problems, technical solution adopted in the utility model is:
A kind of high-tension switch cabinet partial discharge monitoring compound transducer, including shield shell, setting on shield shell and are used In external partial discharge detection equipment signal output interface, be mounted on shield shell upper surface the poly- wave cover of silica gel, for receiving The ultrasonic reception sensor of ultrasonic signal, the reception RF receiving coil for radiofrequency signal, setting are in shield shell lower end It floor on face and is mounted on shield shell and is located at the TEV coupling circuit below floor and for receiving TEV signal Plate;
The inner concave for receiving signal is provided on the poly- wave cover of silica gel;
Ultrasonic reception sensor is arranged at silica gel poly- wave cover center and is located at inner concave focal point;
RF receiving coil is embedded in the poly- wave cover of silica gel and is arranged concentrically with inner concave.
As a further improvement of the above technical scheme:
Ultrasonic reception sensor and reception RF receiving coil are wrapped in the silicon rubber of the poly- wave cover of silica gel.
Shield shell is the aluminium alloy that black oxide film is adhered on surface.
The range of receiving of TEV signal: 3M-80MHz;The range of receiving of ultrasonic signal: 10k-150k;The reception of radiofrequency signal Range: 1M-1.5Ghz.
RF receiving coil is formed by 0.3~0.5 copper wire winding, and the number of turns is 3~5 circles;RF receiving coil is embedded in interior Concave surface front end.
The circular hole for being embedded in ultrasonic reception sensor is provided at silica gel poly- wave cover center.
Floor is honeycomb, has been uniformly distributed the hole of diameter 3mm on it.
The partial discharge of switchgear of the utility model can pass through transient earth voltage (TEV), ultrasonic wave and wide band radio-frequency three Kind method is monitored, these three monitoring modes are different to different electric discharge type sensitivity.The utility model passes through surface-discharge Ultrasound checking can be used, internal discharge can be detected with TEV sensor, and wide band radio-frequency is sensitiveer to point discharge signal, The deficiency of ultrasound and TEV detection can be supplemented.
The beneficial effects of the utility model description without being limited thereto, in order to preferably be easy to understand, in specific embodiment portion Divide and has carried out more detailed description.
Detailed description of the invention
Fig. 1 is the schematic perspective view of the utility model.
Fig. 2 is the structural schematic diagram of the utility model cross section.
Fig. 3 is the structural schematic diagram of the utility model longitudinal section.
Wherein: 1, signal output interface;2, the poly- wave cover of silica gel;3, ultrasonic reception sensor;4, RF receiving coil;5, shield Cover shell;6, floor;7, TEV coupling circuit plate;8, inner concave.
Specific embodiment
As shown in Fig. 1-3, a kind of high-tension switch cabinet partial discharge of the present embodiment monitors compound transducer, including shielding case Body 5, is mounted on shield shell 5 at the signal output interface 1 for being arranged on shield shell 5 and being used for external partial discharge detection equipment The poly- wave cover 2 of silica gel on end face, the ultrasonic reception sensor 3 for received ultrasonic signal, the reception for radiofrequency signal are penetrated Frequency receiving coil 4, the floor 6 being arranged on 5 lower end surface of shield shell and be mounted on shield shell 5 and be located at floor 6 under Side and the TEV coupling circuit plate 7 for being used to receive TEV signal;
The inner concave 8 for receiving signal is provided on the poly- wave cover 2 of silica gel;
Ultrasonic reception sensor 3 is arranged at poly- 2 center of wave cover of silica gel and is located at 8 focal point of inner concave;
RF receiving coil 4 is embedded in the poly- wave cover 2 of silica gel and is arranged concentrically with inner concave 8.
TEV coupling circuit plate 7, ultrasonic reception sensor 3 and RF receiving coil 4 can receive office inside high-tension apparatus simultaneously The transient earth voltage TEV that portion's electric discharge generates, ultrasonic signal and radiofrequency signal.
Ultrasonic reception sensor 3 and reception RF receiving coil 4 are wrapped in the silicon rubber of the poly- wave cover 2 of silica gel;It avoids passing Sensor conductor part is directly contacted with test product high pressure part, and ensure that whole dielectric strength;
Shield shell 5 is the aluminium alloy that black oxide film is adhered on surface;Beauty has been taken into account while guaranteeing structural strength. The utility model can monitor the TEV signal generated by shelf depreciation simultaneously, and ultrasonic signal and radiofrequency signal, sensor ultrasound connect Receiving end uses inner conical hatch frame, can collect signal enhancing detection sensitivity, moreover it is possible to which receiving signal has very strong side Tropism is conducive to accurate measurements fault point.
The range of receiving of TEV signal: 3M -80MHz;The range of receiving of ultrasonic signal: 10k -150k;Radiofrequency signal connects Receive range: 1M -1.5Ghz.
RF receiving coil 4 is formed by 0.3~0.5 copper wire winding, and the number of turns is 3~5 circles.
RF receiving coil 4 is embedded in 8 front end of inner concave;It can be to avoid radio-frequency coil 4 apart from 5 hypotelorism shadow of shield shell It rings signal to receive, fixed angle has determined the directionality of rf signal reception, to guarantee that sensor has radiofrequency signal Higher sensitivity.
The Partial discharge signal that ultrasonic reception sensor 3, RF receiving coil 4 and TEV coupling circuit plate 7 receive is through sensor Signal output interface 1 is connected to partial discharge detection equipment from sensors sides extraction.
The circle of the diameter 10mm depth 5mm for being embedded in ultrasonic reception sensor 3 is provided at poly- 2 center of wave cover of silica gel Hole;Guarantee that ultrasonic reception sensor receiving end is directed straight ahead when installation, it is ensured that the direction accuracy of sensor.In front of sensor The poly- wave cover 2 of silica gel is tapered or concave surface, so that ultrasonic signal is preferably pooled to sensor receiving end, enhance sensor Sensitivity.
In the poly- wave cover 2 of silica gel, RF receiving coil 4 is embedded in along inner concave 8.
Floor 6 is honeycomb, has been uniformly distributed the hole of diameter 3mm on it, while guaranteeing that sensor structure is stablized Weight of equipment is alleviated, coupled capacitor between TEV coupling circuit plate and floor is also reduced.In TEV sensor and ultrasonic sensing On the basis of device, sensor front end increases RF receiving coil again, for receiving device inner space radiation radiofrequency signal, To make up the deficiency of TEV and ultrasonic sensor in signal acquisition.The triple guarantees of TVE, ultrasound, radio frequency, reduce shelf depreciation Fail to report probability, make partial discharge monitoring it is more accurate.The utility model has very high sensitivity and reliability, especially suitable for opening Close cabinet partial discharge monitoring.
The utility model is designed reasonably, low in cost, durable, safe and reliable, easy to operate, time saving and energy saving, saving It is fund, compact-sized and easy to use.
It is to disclose in order to more clear, and the prior art is just no longer enumerated that the utility model, which fully describes,.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations; Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: It can still modify to technical solution documented by previous embodiment, or be equal to part of technical characteristic Replacement;It is obvious for being combined as multiple technical solutions of the those skilled in the art to the utility model.And these It modifies or replaces, the spirit and model of the utility model embodiment technical solution that it does not separate the essence of the corresponding technical solution It encloses.

Claims (7)

1. a kind of high-tension switch cabinet partial discharge monitors compound transducer, it is characterised in that: shielding including shield shell (5), setting It covers on shell (5) and for the signal output interface (1) of external partial discharge detection equipment, is mounted on shield shell (5) upper surface The poly- wave cover (2) of silica gel, for the ultrasonic reception sensor (3) of received ultrasonic signal, for the reception radio frequency of radiofrequency signal Receiving coil (4) is arranged floor (6) on shield shell (5) lower end surface and is mounted on shield shell (5) and is located at TEV coupling circuit plate (7) below floor (6) and for receiving TEV signal;
The inner concave (8) for receiving signal is provided on the poly- wave cover (2) of silica gel;
Ultrasonic reception sensor (3) is arranged at poly- wave cover (2) center of silica gel and is located at inner concave (8) focal point;
RF receiving coil (4) is embedded in the poly- wave cover (2) of silica gel and is arranged concentrically with inner concave (8).
2. high-tension switch cabinet partial discharge according to claim 1 monitors compound transducer, it is characterised in that: ultrasonic reception passes Sensor (3) and reception RF receiving coil (4) are wrapped in the silicon rubber of the poly- wave cover (2) of silica gel.
3. high-tension switch cabinet partial discharge according to claim 2 monitors compound transducer, it is characterised in that: shield shell (5) adhere to the aluminium alloy of black oxide film for surface.
4. high-tension switch cabinet partial discharge according to claim 3 monitors compound transducer, it is characterised in that: TEV signal Range of receiving: 3M -80MHz;The range of receiving of ultrasonic signal: 10k -150k;The range of receiving of radiofrequency signal: 1M- 1.5Ghz。
5. high-tension switch cabinet partial discharge according to claim 4 monitors compound transducer, it is characterised in that: radio frequency reception line Circle (4) is formed by 0.3~0.5 copper wire winding, and the number of turns is 3~5 circles;RF receiving coil (4) is embedded in inner concave (8) front end.
6. high-tension switch cabinet partial discharge according to claim 5 monitors compound transducer, it is characterised in that: in the poly- wave of silica gel The circular hole for being embedded in ultrasonic reception sensor (3) is provided at cover (2) center.
7. high-tension switch cabinet partial discharge according to claim 6 monitors compound transducer, it is characterised in that: floor (6) are Honeycomb has been uniformly distributed the hole of diameter 3mm on it.
CN201920008141.6U 2019-01-03 2019-01-03 High-tension switch cabinet partial discharge monitors compound transducer Active CN209373040U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920008141.6U CN209373040U (en) 2019-01-03 2019-01-03 High-tension switch cabinet partial discharge monitors compound transducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920008141.6U CN209373040U (en) 2019-01-03 2019-01-03 High-tension switch cabinet partial discharge monitors compound transducer

Publications (1)

Publication Number Publication Date
CN209373040U true CN209373040U (en) 2019-09-10

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111024156A (en) * 2019-12-17 2020-04-17 国网上海市电力公司 Multi-sensor integrated monitoring device for GIS information acquisition
US20210349140A1 (en) * 2020-05-08 2021-11-11 Abb Schweiz Ag Sensing arrangement
CN113702685A (en) * 2021-08-31 2021-11-26 西安交通大学 Piezoelectric type ultrasonic-transient earth voltage composite sensor and measuring device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111024156A (en) * 2019-12-17 2020-04-17 国网上海市电力公司 Multi-sensor integrated monitoring device for GIS information acquisition
US20210349140A1 (en) * 2020-05-08 2021-11-11 Abb Schweiz Ag Sensing arrangement
CN113702685A (en) * 2021-08-31 2021-11-26 西安交通大学 Piezoelectric type ultrasonic-transient earth voltage composite sensor and measuring device
CN113702685B (en) * 2021-08-31 2022-10-28 西安交通大学 Piezoelectric type ultrasonic-transient earth voltage composite sensor and measuring device

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