CN201955435U - GIS (gas insulated substation) partial discharge routing inspection UHF (ultra high frequency) sensor - Google Patents
GIS (gas insulated substation) partial discharge routing inspection UHF (ultra high frequency) sensor Download PDFInfo
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- CN201955435U CN201955435U CN2011200282495U CN201120028249U CN201955435U CN 201955435 U CN201955435 U CN 201955435U CN 2011200282495 U CN2011200282495 U CN 2011200282495U CN 201120028249 U CN201120028249 U CN 201120028249U CN 201955435 U CN201955435 U CN 201955435U
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Abstract
A GIS partial discharge routing inspection UHF sensor belongs to the field of detection techniques, is used for detecting superhigh frequency signals generated by partial discharge in GIS equipment, and adopts the technical scheme as follows: the sensor comprises a base, an inner shielding case, an outer shielding case, an antenna and a signal processing circuit, wherein a circuit board of the signal processing circuit is installed in the inner shielding case; the inner shielding case is sleeved with the outer shielding case; the outer shielding case is fixed on the base; the antenna is embedded at the lower part of the base; a signal transmission wire of the antenna is connected with an input end of the signal processing circuit; and fixing lugs are arranged at the two ends of the base. The sensor has the advantages that the installation is convenient, fast and stable, the anti-interference ability is strong, the routing inspection workload of the GIS equipment can be reduced greatly, and the detection working efficiency as well as the reliability of the detection result can be improved.
Description
Technical field
The utility model relates to a kind of sensor that is used to gather the ultrahigh-frequency signal that is produced when shelf depreciation takes place GIS, belongs to the detection technique field.
Background technology
At present, GIS(GIS, gas insulated substation is meant all or part of employing gas but not is in air under the atmospheric pressure as the metal enclosed switchgear of insulating medium.Inflation is sulfur hexafluoride generally speaking.) equipment has been widely used in each high voltage substation, shelf depreciation is to cause the apparatus insulated cause faults of GIS.Can move with security and stability in order to ensure GIS equipment, be necessary the shelf depreciation of its inside is monitored.
At present, detection method for local discharge commonly used is a ultrasonic method of measuring, when adopting this method to detect ultrasonic signal, ultrasonic probe must well contact with the GIS device body, and need between ultrasonic probe and cabinet, smear couplant, install loaded down with trivial detailsly, operation is wasted time and energy, and testing result very easily is subjected to the influence of external environment.If can design a kind of simple to operate, easy for installation, quick and the strong local discharge sensor of antijamming capability, will significantly reduce the workload of GIS equipment routing inspection, improve the reliability of testing efficient and testing result.In addition, the existing sensors bottom surface is the plane, and the GIS apparatus body is a drum, thereby sensor has only a line to contact with the GIS body in the process that detects, and is difficult to be stabilized on the same position, and this also exerts a certain influence to measurement result.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of easy for installation, quick, stable and GIS office that antijamming capability is strong to put patrols and examines the UHF sensor.
Problem described in the utility model realizes with following technical proposals:
A kind of GIS office puts and patrols and examines the UHF sensor, form by base, inner shield, external shield, antenna and signal processing circuit, the circuit board of described signal processing circuit is installed in the inner shield, described inner shield is sleeved in the external shield, described external shield is fixed on the base, described antenna is inlaid in the bottom of base, and its signal transmssion line connects the input end of signal processing circuit, and the two ends of described base are provided with fixedly ear.
Above-mentioned GIS office puts and patrols and examines the UHF sensor, described signal processing circuit is by the wave filter that connects successively, first super high frequency amplifier, second super high frequency amplifier, detection chip and peak holding circuit are formed, the output signal of the input termination antenna of described wave filter, described peak holding circuit is by two operational amplifiers, two diodes, a resistance and an electric capacity are formed, the in-phase input end of first operational amplifier connects the output terminal of detection chip, inverting input connects the in-phase input end of second operational amplifier, and output terminal connects the in-phase input end of second operational amplifier successively through first diode and second diode; Described second operational amplifier is connected into voltage follower, and its output terminal is connected with PD meter by output interface; The serial connection point of two diodes of described resistance one termination, the output terminal of a termination second operational amplifier; The in-phase input end of described electric capacity one end ground connection one termination second operational amplifier.
Above-mentioned GIS office puts and patrols and examines the UHF sensor, and described inner shield is provided with four chambeies, and the circuit board of wave filter, two-stage radio-frequency amplifier, detection chip and peak holding circuit is installed respectively in four chambeies.
Above-mentioned GIS office puts and patrols and examines the UHF sensor, and the top of described antenna is provided with reflecting plate.
Above-mentioned GIS office puts and patrols and examines the UHF sensor, and the bottom of described base is provided with short leg.
The utility model utilizes antenna to receive the ultrahigh-frequency signal that produces owing to shelf depreciation in the GIS equipment, and this signal is delivered to PD meter by the signal processing circuit collection and after handling.Because signal processing circuit is installed in the two-layer radome, effectively suppressed the interference of the interference of external signal and this circuit to the outside.Inner shield adopts the multi-cavity body structure, has reduced disturbing mutually between circuit.The signal that reflecting plate transmits GIS inside has amplification, also can reduce the interference of external signal simultaneously.The purpose that short leg is set on the base is sensor to be installed stablize.
The utility model is easy for installation, quick, stable and antijamming capability is strong, can significantly reduce the workload of GIS equipment routing inspection, improves the reliability of testing efficient and testing result.
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 an electrical schematic diagram.
Each label is among the figure: 1, base; 2, circuit board; 3, external shield; 4, inner shield; 5, reflecting plate; 6, signal transmssion line; P, output interface; ANT, antenna; LB, wave filter; FD1, FD2, super high frequency amplifier; U1, detection chip; F1, F2, operational amplifier; D1, D2, diode; C, electric capacity; R, resistance; P, output interface.
Embodiment
The utility model is that the sensor of patrolling and examining is put in a kind of GIS of being applicable to office, and is sensitive to the superfrequency response, measures bandwidth, good in anti-interference performance, and use is simple and easy to do.
Referring to Fig. 1, the utility model is made up of base 1, antenna ANT, external shield 3, inner shield 4, reflecting plate 5, signal processing circuit.Base 1 is the Teflon material, and there is fixedly ear at its two ends, thereby available drawstring passes sensor is fixed on the GIS, and base 1 bottom is processed with short leg, can make sensor obtain effective support on the cylinder type body of GIS, and can make itself and bottom surface spaced apart.In base 1 bottom antenna ANT is housed, reflecting plate 5 is equipped with in a distance above the antenna ANT, and the signal that transmits for GIS inside has amplification, with the interference that also can reduce external signal.The double layer screen body that the signal processing circuit outer setting is made up of external shield 3 and inner shield 4, inner shield 4 adopts the multi-cavity body structure.Avoid crosstalking between internal circuit, and can effectively mask extraneous electromagnetic interference (EMI) (for example mobile phone signal interference).The utility model also can be used for the high-tension apparatus that Data-logging switch cabinet etc. is not the complete metal shielding.
Referring to Fig. 2, by antenna ANT(antenna) signal that receives is input on the circuit board, this signal transfers to super high frequency amplifier FD1 after wave filter LB filtering, FD2, signal after amplifying through two-stage transfers to detection chip U1(U1 and adopts LG5534) carry out detection, the ultra-high frequency signal that collects is reduced to low frequency signal, again via F1, F2, D1, D2, R, the peak holding circuit that C forms further elongates the die-away time of pulse signal, make signal frequency be reduced to the frequency that PD meter can detect, be connected on the input channel of PD meter via output interface P again.
Claims (5)
1. a GIS office puts and patrols and examines the UHF sensor, it is characterized in that, it is made up of base (1), inner shield (4), external shield (3), antenna (ANT) and signal processing circuit, the circuit board of described signal processing circuit is installed in the inner shield (4), described inner shield (4) is sleeved in the external shield (3), described external shield (3) is fixed on the base (1), described antenna (ANT) is inlaid in the bottom of base (1), its signal transmssion line (6) connects the input end of signal processing circuit, and the two ends of described base (1) are provided with fixedly ear.
2. put according to the described GIS of claim 1 office and patrol and examine the UHF sensor, it is characterized in that, described signal processing circuit is by the wave filter (LB) that connects successively, first super high frequency amplifier (FD1), second super high frequency amplifier (FD2), detection chip (U1) and peak holding circuit are formed, the output signal of the input termination antenna (ANT) of described wave filter (LB), described peak holding circuit is by two operational amplifiers, two diodes, resistance (R) and an electric capacity (C) are formed, the in-phase input end of first operational amplifier (F1) connects the output terminal of detection chip (U1), inverting input connects the in-phase input end of second operational amplifier (F2), and output terminal connects the in-phase input end of second operational amplifier (F2) successively through first diode (D1) and second diode (D2); Described second operational amplifier (F2) is connected into voltage follower, and its output terminal is connected with PD meter by output interface (P); The serial connection point of two diodes of described resistance (R) termination, the output terminal of a termination second operational amplifier (F2); The in-phase input end of described electric capacity (C) end ground connection one termination, second operational amplifier (F2).
3. put according to the described GIS of claim 2 office and patrol and examine the UHF sensor, it is characterized in that, described inner shield (4) is provided with four chambeies, and the circuit board of wave filter (LB), two-stage radio-frequency amplifier, detection chip (U1) and peak holding circuit is installed respectively in four chambeies.
4. put according to the described GIS of claim 3 office and patrol and examine the UHF sensor, it is characterized in that the top of described antenna (ANT) is provided with reflecting plate (5).
5. put according to the described GIS of claim 4 office and patrol and examine the UHF sensor, it is characterized in that the bottom of described base (1) is provided with short leg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200282495U CN201955435U (en) | 2011-01-27 | 2011-01-27 | GIS (gas insulated substation) partial discharge routing inspection UHF (ultra high frequency) sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200282495U CN201955435U (en) | 2011-01-27 | 2011-01-27 | GIS (gas insulated substation) partial discharge routing inspection UHF (ultra high frequency) sensor |
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| Publication Number | Publication Date |
|---|---|
| CN201955435U true CN201955435U (en) | 2011-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200282495U Expired - Fee Related CN201955435U (en) | 2011-01-27 | 2011-01-27 | GIS (gas insulated substation) partial discharge routing inspection UHF (ultra high frequency) sensor |
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| CN (1) | CN201955435U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103257305A (en) * | 2012-02-21 | 2013-08-21 | 国家电网公司 | External ultrahigh frequency detecting sensor and detecting method thereof |
| CN103529368A (en) * | 2013-10-21 | 2014-01-22 | 国家电网公司 | Online monitoring system for ultrahigh-frequency partial discharge of high-voltage parallel reactors of substation |
| CN104569752A (en) * | 2014-12-27 | 2015-04-29 | 国家电网公司 | System for monitoring partial discharge of power distribution facilities |
| WO2016058526A1 (en) * | 2014-10-14 | 2016-04-21 | 中国西电电气股份有限公司 | Internal video monitoring system and method for gis device |
| CN105676087A (en) * | 2016-02-02 | 2016-06-15 | 国家电网公司 | Sensing system for detecting ultrahigh-frequency partial discharging of GIS pouring hole |
| CN105738786A (en) * | 2016-03-30 | 2016-07-06 | 合肥工业大学智能制造技术研究院 | GIS ultrahigh frequency partial discharge signal collection device which shields external interface |
| CN112290899A (en) * | 2020-10-26 | 2021-01-29 | 杭州爱华仪器有限公司 | Measuring circuit preamplifier |
-
2011
- 2011-01-27 CN CN2011200282495U patent/CN201955435U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103257305A (en) * | 2012-02-21 | 2013-08-21 | 国家电网公司 | External ultrahigh frequency detecting sensor and detecting method thereof |
| CN103529368A (en) * | 2013-10-21 | 2014-01-22 | 国家电网公司 | Online monitoring system for ultrahigh-frequency partial discharge of high-voltage parallel reactors of substation |
| WO2016058526A1 (en) * | 2014-10-14 | 2016-04-21 | 中国西电电气股份有限公司 | Internal video monitoring system and method for gis device |
| US10666907B2 (en) | 2014-10-14 | 2020-05-26 | China Xd Electric Co., Ltd. | Internal video monitoring system and method for GIS device |
| CN104569752A (en) * | 2014-12-27 | 2015-04-29 | 国家电网公司 | System for monitoring partial discharge of power distribution facilities |
| CN105676087A (en) * | 2016-02-02 | 2016-06-15 | 国家电网公司 | Sensing system for detecting ultrahigh-frequency partial discharging of GIS pouring hole |
| CN105738786A (en) * | 2016-03-30 | 2016-07-06 | 合肥工业大学智能制造技术研究院 | GIS ultrahigh frequency partial discharge signal collection device which shields external interface |
| CN105738786B (en) * | 2016-03-30 | 2019-02-26 | 合肥工业大学智能制造技术研究院 | A kind of GIS high-frequency local discharging signal pickup assembly shielding external interference |
| CN112290899A (en) * | 2020-10-26 | 2021-01-29 | 杭州爱华仪器有限公司 | Measuring circuit preamplifier |
| CN112290899B (en) * | 2020-10-26 | 2024-02-06 | 杭州爱华仪器有限公司 | Preamplifier of measuring circuit |
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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: 20110831 Termination date: 20150127 |
|
| EXPY | Termination of patent right or utility model |