CN201903615U - Self-absorption gas insulated switchgear (GIS) partial discharge detection sensor - Google Patents
Self-absorption gas insulated switchgear (GIS) partial discharge detection sensor Download PDFInfo
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- CN201903615U CN201903615U CN2010206665218U CN201020666521U CN201903615U CN 201903615 U CN201903615 U CN 201903615U CN 2010206665218 U CN2010206665218 U CN 2010206665218U CN 201020666521 U CN201020666521 U CN 201020666521U CN 201903615 U CN201903615 U CN 201903615U
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Abstract
The utility model relates to a self-absorption gas insulated switchgear (GIS) partial discharge detection sensor, which comprises an ultrasonic sensor, a signal processing circuit and a fixing device of the signal processing circuit, wherein the ultrasonic sensor comprises a housing and a cylindrical oscillator and the signal processing circuit which are arranged in the housing; a sound insulation tube which is coaxial with the oscillator is sheathed outside the oscillator; the rear end of the sound insulation tube is closed; the front end face of the oscillator provided with resonant diaphragms which are inlaid in a signal receiving port at the front part of the housing; the input end of the signal processing circuit is connected with an output signal of the oscillator; an output signal line is connected with a radio-frequency head arranged on a seal chamber; and the signal processing circuit comprises a field-effect tube, an inductor and three operational amplifiers. The utility model is convenient and rapid to install and has high work efficiency, and moreover, the ultrasonic sensor can be ensured to be tightly fit with the outer wall of gas insulated switchgear.
Description
Technical field
The utility model relates to a kind of partial discharge detecting sensor based that can be fixed in convenient, reliably on the gas insulated combined electrical equipment outer wall, belongs to the detection technique field.
Background technology
Gas insulated combined electrical equipment (GIS) is the visual plant of electric system, and its insulating property directly affect the operation conditions of electric system.Shelf depreciation is the sign and the form of expression of GIS built-in electrical insulation deterioration, therefore, puts the early stage insulation defect that detection can be found GIS inside by office.When shelf depreciation takes place GIS, can produce ultrasonic pulse, utilize the voltage sensitive sensor that is arranged on the GIS outer wall to collect ultrasonic signal and it is analyzed, just can judge the insulating property of GIS.But because the profile of GIS is a tubular, existing sensors need utilize screw clamp or bandage to fix, and extremely inconvenience is installed, inefficiency, and be difficult to guarantee that sensor and GIS outer wall fit tightly, reliability is relatively poor, can't guarantee measuring accuracy.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of can be fixed in convenient, reliably that GIS is lip-deep puts detecting sensor from absorption type GIS office.
Problem described in the utility model realizes with following technical proposals:
A kind ofly put detecting sensor from absorption type GIS office, it is made up of sonac, signal processing circuit and stationary installation thereof, comprise shell during described sonac constitutes and be loaded on shell interior rectangle column monopole and signal processing circuit, described oscillator outer cover is equipped with the sound insulation tube of coaxial with it and back-end closure, and the oscillator front end face is provided with responant diaphragm and inlays signal receiving port place in the shell front portion; The output signal of the input termination oscillator of described signal processing circuit, output signal line is connected with radio-frequency maser on being arranged on seal chamber;
Described signal processing circuit is made up of field effect transistor, inductance, three operational amplifiers, resistance and electric capacity, the drain electrode of described field effect transistor connects positive source, grid connects the output signal of oscillator, and source electrode connects power cathode and connects the in-phase input end of first operational amplifier through the Hi-pass filter that first electric capacity and second resistance are formed through first resistance; The inverting input of first operational amplifier connects positive source and connects its output terminal through the 4th resistance through the 3rd resistance, and the output terminal of first operational amplifier connects the in-phase input end of second operational amplifier through second electric capacity; The inverting input of second operational amplifier connects power cathode and connects its output terminal through the 6th resistance through the 5th resistance, and the output terminal of second operational amplifier connects the in-phase input end of the 3rd operational amplifier through the low-pass filter of the 7th resistance and the 3rd electric capacity composition; The 3rd operational amplifier is connected into voltage follower, and its output terminal connects positive source through the 4th electric capacity and inductance successively, and the output signal of the 4th electric capacity and inductance serial connection point connects the radio-frequency maser on the seal chamber.
Above-mentionedly put detecting sensor from absorption type GIS office, described stationary installation is made up of ripple vacuum cup, supporting tube, back-moving spring, sliding sleeve and seal chamber; Described ripple vacuum cup bottom and seal chamber are fixed together; Described sliding sleeve is a tubular, and it passes ripple vacuum cup and seal chamber and is fixed into one with them; Described supporting tube is through in the sliding sleeve and with sliding sleeve and is slidingly matched, and the one end stretches in the seal chamber, and the other end connects sonac; Described back-moving spring is sleeved on the supporting tube, and one end roof pressure is on sonac, and other end roof pressure is on sliding sleeve.
Above-mentionedly put detecting sensor, be provided with the silica gel circle between described responant diaphragm and the shell from absorption type GIS office.
The utility model is by cooperatively interacting between ripple vacuum cup, supporting tube, back-moving spring and the sliding sleeve, sonac is pressed on the outer wall of gas insulated combined electrical equipment, not only easy for installation, quick, high efficiency, and can make between the outer wall of sonac and gas insulated combined electrical equipment and remain constant compression force, guarantee that the two fits tightly, have very high reliability.In addition, the circuit in the utility model is simple and practical, after the signal process field effect transistor Q impedance conversion that oscillator Y receives, by the amplification filtering processing of circuit of back, has also effectively eliminated the interference of low frequency signal, makes the detection signal accuracy rate higher; Signal and power supply a transmission over coaxial cable, have also been improved antijamming capability, made data transmission more reliable and more stable.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the electrical schematic diagram of signal processing circuit.
Each label is among the figure: 1, responant diaphragm; 2, supporting tube; 3, back-moving spring; 4, sliding sleeve; 5, spacing back-up ring; 6, ripple vacuum cup; 7, seal chamber; 8, radio-frequency maser; 9, silica gel circle; 10, sound insulation tube; 11, shell; 12, signal processing circuit; 13, sealing gasket; 14, loam cake; Y, oscillator; Q, field effect transistor; F1, first operational amplifier; F2, second operational amplifier; F3, the 3rd operational amplifier; L, inductance; C1～C4, electric capacity; R1～R7, resistance.
Embodiment
The principle of the GIS Ultrasonic Detection that the utility model adopts is as follows:
When GIS generation office puts intermolecular sharp impacts and on macroscopic view moment form a kind of pressure, produce ultrasonic pulse, type comprises compressional wave, shear wave and surface wave.Along the compressional wave that has only of SF6 gas propagation, this ultrasonic longitudinal wave is propagated to the four sides with the form of spherical wave among the GIS.Utilize directed piezoelectric chip (being oscillator Y) office of acceptance to put ultrasonic signal, acoustical signal through processing and amplifying, by the analysis to acoustical signal amplitude, phase place, frequency domain collection of illustrative plates, time domain collection of illustrative plates, is determined discharge position at the back-end data processing unit.
Referring to Fig. 1, sonac is fixed to supporting tube 2 ends; Supporting tube 2, back-moving spring 3 match with sliding sleeve 4, constitute moving part; 5 pairs of supporting tubes of spacing back-up ring 2 carry out spacing, prevent that supporting tube 2 from extracting out in the sliding sleeve 4 under the effect of back-moving spring 3; Ripple vacuum cup 6 is fixed on the seal chamber 7 by sliding sleeve 4.Signal transmssion line passes supporting tube 2 and guides to radio-frequency maser 8.
During use ripple vacuum cup 6 is aimed at the outer wall of gas insulated combined electrical equipments and push, the cooperation of the flexible and seal chamber 7 by ripple vacuum cup 6, the its internal partial air is extruded, make the ripple vacuum cup 6 inner negative pressure that produce, thereby be adsorbed on securely on the outer wall of gas insulated combined electrical equipment, the reacting force of back-moving spring 3 makes the outer wall of sonac and gas insulated combined electrical equipment keep constant pressure, and then makes the sonac detection signal more stable.Seal chamber 7 is returned supporting tube 2 circuitous space is provided except that being used to install the radio-frequency maser 8, be convenient to the compression of ripple vacuum cup 6.
The effect of silica gel circle 9 is that assurance oscillator Y and sound insulation tube 10 are concentric, is beneficial to the directive reception of ultrasonic signal.Sound insulation tube 10 shielding space electromagnetic interference signals.
Referring to Fig. 2, after piezoelectric chip (being oscillator Y) receives signal, earlier carry out impedance conversion through field effect transistor Q, the bivalent high-pass filter that element is formed around being reached by first operational amplifier again carries out filtering and pre-processing and amplifying to signal, signal amplifies via second operational amplifier then, after the voltage follower of being made up of the 3rd operational amplifier carries out impedance conversion at last, is coupled on the power lead through C4, L separates ultrasonic signal with power supply, power supply and signal are drawn by a radio-frequency maser.
At the back-end data processing unit ultrasonic signal is separated, transform through AD, software analysis is handled, and can obtain discharge information, for the analysis of failure position provides reliable Data Source.
Claims (3)
1. put detecting sensor from absorption type GIS office for one kind, it is characterized in that, it is made up of sonac, signal processing circuit and stationary installation thereof, comprise shell (11) during described sonac constitutes and be loaded on shell (11) inner rectangle column monopole (Y) and signal processing circuit (12), described oscillator (Y) outer cover is equipped with the sound insulation tube (10) of coaxial with it and back-end closure, and the oscillator front end face is provided with responant diaphragm (1) and inlays at the anterior signal receiving port place of shell (11); The output signal of the input termination oscillator (Y) of described signal processing circuit (12), output signal line is connected with radio-frequency maser (8) on being arranged on seal chamber (7);
Described signal processing circuit is made up of field effect transistor (Q), inductance (L) and three operational amplifiers, the drain electrode of described field effect transistor (Q) connects positive source, grid connects the output signal of oscillator (Y), and source electrode connects power cathode and connects the in-phase input end of first operational amplifier (F1) through the Hi-pass filter that first electric capacity (C1) and second resistance (R2) are formed through first resistance (R1); The inverting input of first operational amplifier (F1) connects positive source and connects its output terminal through the 4th resistance (R4) through the 3rd resistance (R3), and the output terminal of first operational amplifier (F1) connects the in-phase input end of second operational amplifier (F2) through second electric capacity (C2); The inverting input of second operational amplifier (F2) connects power cathode and connects its output terminal through the 6th resistance (R6) through the 5th resistance (R5), and the output terminal of second operational amplifier (F2) connects the in-phase input end of the 3rd operational amplifier (F3) through the low-pass filter of the 7th resistance (R7) and the 3rd electric capacity (C3) composition; The 3rd operational amplifier (F3) is connected into voltage follower, and its output terminal connects positive source through the 4th electric capacity (C4) and inductance (L) successively, and the output signal of the 4th electric capacity (C4) and inductance (L) serial connection point connects the radio-frequency maser (8) on the seal chamber (7).
2. according to claim 1ly put detecting sensor, it is characterized in that described stationary installation is made up of ripple vacuum cup (6), supporting tube (2), back-moving spring (3), sliding sleeve (4) and seal chamber (7) from absorption type GIS office; Described ripple vacuum cup (6) bottom and seal chamber (7) are fixed together; Described sliding sleeve (4) is a tubular, and it passes ripple vacuum cup and seal chamber and is fixed into one with them; Described supporting tube (2) is through in the sliding sleeve (4) and with sliding sleeve (4) and is slidingly matched, and the one end stretches in the seal chamber (7), and the other end connects sonac; Described back-moving spring (3) is sleeved on the supporting tube (2), and one end roof pressure is on sonac, and other end roof pressure is on sliding sleeve (4).
3. put detecting sensor according to claim 2 is described from absorption type GIS office, it is characterized in that, be provided with silica gel circle (9) between described responant diaphragm (1) and the shell (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206665218U CN201903615U (en) | 2010-12-18 | 2010-12-18 | Self-absorption gas insulated switchgear (GIS) partial discharge detection sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206665218U CN201903615U (en) | 2010-12-18 | 2010-12-18 | Self-absorption gas insulated switchgear (GIS) partial discharge detection sensor |
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| Publication Number | Publication Date |
|---|---|
| CN201903615U true CN201903615U (en) | 2011-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206665218U Expired - Fee Related CN201903615U (en) | 2010-12-18 | 2010-12-18 | Self-absorption gas insulated switchgear (GIS) partial discharge detection sensor |
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| CN (1) | CN201903615U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344797A (en) * | 2013-07-04 | 2013-10-09 | 国家电网公司 | GIS ultrasonic sensor universal clamping device |
| CN104569760A (en) * | 2014-12-31 | 2015-04-29 | 刘大永 | Local discharge ultrasonic detection device for small-sized high-voltage element |
| CN106353653A (en) * | 2016-10-13 | 2017-01-25 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Suction disk type local discharging ultrasonic transducer |
| CN106569113A (en) * | 2016-11-14 | 2017-04-19 | 国网天津市电力公司 | Vacuum adsorption type partial discharge probe device |
| CN109298075A (en) * | 2018-11-05 | 2019-02-01 | 武汉科技大学 | A kind of sensing detection module and Building Curtain Wall Structures safety detecting system |
| CN112394106A (en) * | 2020-11-02 | 2021-02-23 | 珠海华瑞诚科技有限公司 | Distribution room system and SF6 gas concentration detection method |
| CN114545168A (en) * | 2022-02-24 | 2022-05-27 | 保定天威新域科技发展有限公司 | Soft adsorption ultrasonic sensor for GIS partial discharge detection |
| CN117741205A (en) * | 2024-02-21 | 2024-03-22 | 华北电力科学研究院有限责任公司 | Ultrasonic sensor reinforcement protection device and sensor stability monitoring method |
-
2010
- 2010-12-18 CN CN2010206665218U patent/CN201903615U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344797A (en) * | 2013-07-04 | 2013-10-09 | 国家电网公司 | GIS ultrasonic sensor universal clamping device |
| CN104569760A (en) * | 2014-12-31 | 2015-04-29 | 刘大永 | Local discharge ultrasonic detection device for small-sized high-voltage element |
| CN104569760B (en) * | 2014-12-31 | 2017-06-16 | 刘大永 | A kind of ultrasonic detection device for partial discharge for small size high voltage devices |
| CN106353653A (en) * | 2016-10-13 | 2017-01-25 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Suction disk type local discharging ultrasonic transducer |
| CN106569113A (en) * | 2016-11-14 | 2017-04-19 | 国网天津市电力公司 | Vacuum adsorption type partial discharge probe device |
| CN109298075A (en) * | 2018-11-05 | 2019-02-01 | 武汉科技大学 | A kind of sensing detection module and Building Curtain Wall Structures safety detecting system |
| CN112394106A (en) * | 2020-11-02 | 2021-02-23 | 珠海华瑞诚科技有限公司 | Distribution room system and SF6 gas concentration detection method |
| CN114545168A (en) * | 2022-02-24 | 2022-05-27 | 保定天威新域科技发展有限公司 | Soft adsorption ultrasonic sensor for GIS partial discharge detection |
| CN117741205A (en) * | 2024-02-21 | 2024-03-22 | 华北电力科学研究院有限责任公司 | Ultrasonic sensor reinforcement protection device and sensor stability monitoring method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110720 Termination date: 20161218 |
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| CF01 | Termination of patent right due to non-payment of annual fee |