CN204177874U - The charged background noise pick-up unit of a kind of distribution cable - Google Patents
The charged background noise pick-up unit of a kind of distribution cable Download PDFInfo
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- CN204177874U CN204177874U CN201420715701.9U CN201420715701U CN204177874U CN 204177874 U CN204177874 U CN 204177874U CN 201420715701 U CN201420715701 U CN 201420715701U CN 204177874 U CN204177874 U CN 204177874U
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- 238000009826 distribution Methods 0.000 title claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 35
- 238000009413 insulation Methods 0.000 claims abstract description 30
- 238000012544 monitoring process Methods 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- 238000004891 communication Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000002452 interceptive effect Effects 0.000 claims abstract description 8
- 238000012360 testing method Methods 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 206010038743 Restlessness Diseases 0.000 abstract description 7
- 238000003745 diagnosis Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 201000004569 Blindness Diseases 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012502 risk assessment Methods 0.000 description 1
- 238000009666 routine test Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Abstract
The utility model discloses the charged background noise pick-up unit of a kind of distribution cable, comprise background noise pick-up unit, TEV sensor and detection main frame, described TEV sensor is connected with detection main-machine communication by signal cable, described background noise pick-up unit receives the external interfering noise signal in transformer station and is transferred to detection host process, described background noise pick-up unit comprises noise monitoring body and insulation crust, described noise monitoring body is wrapped in insulation crust, described noise monitoring body comprises metal is formed, be used for receiving the external interfering noise signal in transformer station, described insulation crust completes insulation and support function, described TEV sensor to be installed on outside switch cubicle and outside background noise pick-up unit insulation crust.The utility model can ensure consistance and the synchronism of ground unrest and actual discharge signal, for historical trend compare, lateral comparison and fault diagnosis provide data accurately.
Description
Technical field
The utility model relates to intelligent grid live detection field, particularly relates to distribution cable terminal Partial Discharge Detecting Technology field.
Background technology
Power cable is due to reasons such as factory process technique, field fabrication technique and running environment corrosion, how much can there are some defects in insulation course, these defects make uniform electric field generation distortion originally around cable core, thus excite shelf depreciation, finally develop into cable breakdown fault, cause serious consequence.Cable is generally embedded in cable duct, after insulation starts deterioration or cable breaks down, how efficiently and exactly to find insulation defect point and eliminates fault by the problem of people's extensive concern.
Along with distrbution network is to intelligent direction development, the off-line routine test that past adopts always and the method for periodic maintenance, because having, blindness is large, frequent operation and the excessive shortcoming such as maintenance, causes equipment dependability to reduce, and day by day seems not conform to the development of electrical network; On the other hand, by the effort of each research department, institution of higher learning and applying unit, make the constantly progress of status of electric power detection technique, equipment state overhauling based on this obtains the very big attention of State Grid Corporation of China.Power cable state detects and the object of risk assessment is based on repair based on condition of component means, improves power supply reliability and the equipment use efficiency of electric system as far as possible.In recent years, adopt the measuring technique of TEV sensor detection streamer terminal, be a kind of detection technique relatively, carry out across comparison with the signal amplitude detected and longitudinally contrast, determine whether the insulation at cable termination place exists exception by the contrast of signal amplitude.Due to this feature that TEV detects, first detection background noise when needing to detect at the scene.At present, during detection background noise, generally adopt with high-tension switch cabinet without the metallic article be directly electrically connected, as the metallic article such as metal window, metal gate connects golden TEV read background value, reference data when testing for this with this.
But at least there is the following two kinds shortcoming in this method:
1, in switchyard, switching station or transformer station, metallic article is not easily found sometimes, and metallic article range switch cabinet is comparatively far away sometimes, therefore makes troubles to Site Detection, reduces scene detection efficiency;
2, usually when carrying out high-tension switch cabinet live detection, detect transformer station and need half an hour consuming time by several hours not etc., during this period, ground unrest not remains unchanged always.This starts or detection background noise mode once at the end of test in test, truly can not reflect the actual conditions of ground unrest.
Utility model content
Technical problem to be solved in the utility model is just to provide the charged background noise pick-up unit of a kind of distribution cable, effectively can solve poor efficiency and detection data problem not in time when ground unrest detects.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: the charged background noise pick-up unit of a kind of distribution cable, comprise background noise pick-up unit, TEV sensor and detection main frame, described TEV sensor is connected with detection main-machine communication by signal cable, described background noise pick-up unit receives the external interfering noise signal in transformer station and is transferred to detection host process, described background noise pick-up unit comprises noise monitoring body and insulation crust, described noise monitoring body is wrapped in insulation crust, described noise monitoring body comprises metal is formed, be used for receiving the external interfering noise signal in transformer station, described insulation crust completes insulation and support function, described TEV sensor to be installed on outside switch cubicle and outside background noise pick-up unit insulation crust.
Preferably, described insulation crust adopts epoxy resin material.
Preferably, described detection main frame is also connected with draw-out power supply, described draw-out power supply comprises transducer, rectifier and accumulator, described transducer is arranged on tested cable, responded to three-phase alternating current is also sent into rectifier rectification by induction three-phase alternating current, direct current after rectification is to charge in batteries, and accumulator is for detecting host supplying power.
Preferably, described detection main frame is provided with GPRS communication unit, and testing result is transferred to background monitoring system by GPRS communication unit by described detection main frame.
The technical solution adopted in the utility model, during use, is adsorbed on background noise pick-up unit by adsorbable formula TEV sensor, synchronous reading noise floor value, can ensure that ground unrest is consistent with actual discharge signal, improve the accuracy detecting data, ensure the reliability of last diagnostic conclusion.
After adopting this design, the utility model at least tool has the following advantages:
1, the background noise pick-up unit that the utility model adopts is provided with insulation crust, meets safety requirements during high voltage electric power equip ment live detection, ensure that security when user of service operates this instrument;
2, the background noise pick-up unit that adopts of the utility model is with metal shell, without the need to finding the associated metal goods in transformer station, and efficient, convenient when ensure that detection;
3, use the utility model when carrying out Site Detection, consistance and the synchronism of ground unrest and actual discharge signal can be ensured, for historical trend compare, lateral comparison and fault diagnosis provide data accurately.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is further described:
Fig. 1 is the scheme of installation of distribution cable terminal measuring device with electricity;
Fig. 2 is the schematic diagram of background noise pick-up unit.
Embodiment
As depicted in figs. 1 and 2, the charged background noise pick-up unit of a kind of distribution cable, comprise background noise pick-up unit 1, TEV sensor 2 and detect main frame 4, described TEV sensor is connected with detection main-machine communication by signal cable 3, and described background noise pick-up unit receives the external interfering noise signal in transformer station and is transferred to detection host process.
Described background noise pick-up unit 1 comprises noise monitoring body 11 and insulation crust 12, described noise monitoring body is wrapped in insulation crust, described noise monitoring body comprises metal is formed, be used for receiving the external interfering noise signal in transformer station, described insulation crust completes insulation and support function, and described TEV sensor to be installed on outside switch cubicle and outside background noise pick-up unit insulation crust.
When substation field detects the shelf depreciation of high-tension switch cabinet, TEV sensor (transient state contrast potential sensor) is adsorbed on background noise pick-up unit, synchronously can reads noise floor value.Use very safe, convenient, can ensure that the local discharge signal detected is synchronous with ground unrest, ensure that accuracy and the reliability of detection signal.
Wherein, the metal that noise monitoring body adopts is simple metal, alloying metal or other any type metals.Described insulation crust adopts epoxy resin material.Can tolerate and be not less than 35kV high pressure.Background noise pick-up unit surrounding is tightly surrounded by insulation crust, is fixed between insulation crust and noise monitoring body by screw or cementing agent.
Described detection main frame is also connected with draw-out power supply, described draw-out power supply comprises transducer, rectifier and accumulator, described transducer is arranged on tested cable, responded to three-phase alternating current is also sent into rectifier rectification by induction three-phase alternating current, direct current after rectification is to charge in batteries, and accumulator is for detecting host supplying power.
Described detection main frame is provided with GPRS communication unit, and testing result is transferred to background monitoring system by GPRS communication unit by described detection main frame.
Claims (4)
1. the charged background noise pick-up unit of distribution cable, comprise background noise pick-up unit, TEV sensor and detection main frame, described TEV sensor is connected with detection main-machine communication by signal cable, described background noise pick-up unit receives the external interfering noise signal in transformer station and is transferred to detection host process, it is characterized in that: described background noise pick-up unit comprises noise monitoring body and insulation crust, described noise monitoring body is wrapped in insulation crust, described noise monitoring body comprises metal is formed, be used for receiving the external interfering noise signal in transformer station, described insulation crust completes insulation and support function, described TEV sensor to be installed on outside switch cubicle and outside background noise pick-up unit insulation crust.
2. the charged background noise pick-up unit of a kind of distribution cable according to claim 1, is characterized in that: described insulation crust adopts epoxy resin material.
3. the charged background noise pick-up unit of a kind of distribution cable according to claim 1, it is characterized in that: described detection main frame is also connected with draw-out power supply, described draw-out power supply comprises transducer, rectifier and accumulator, described transducer is arranged on tested cable, responded to three-phase alternating current is also sent into rectifier rectification by induction three-phase alternating current, direct current after rectification is to charge in batteries, and accumulator is for detecting host supplying power.
4. the charged background noise pick-up unit of a kind of distribution cable according to claim 1, it is characterized in that: described detection main frame is provided with GPRS communication unit, testing result is transferred to background monitoring system by GPRS communication unit by described detection main frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420715701.9U CN204177874U (en) | 2014-11-25 | 2014-11-25 | The charged background noise pick-up unit of a kind of distribution cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420715701.9U CN204177874U (en) | 2014-11-25 | 2014-11-25 | The charged background noise pick-up unit of a kind of distribution cable |
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| Publication Number | Publication Date |
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| CN204177874U true CN204177874U (en) | 2015-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420715701.9U Active CN204177874U (en) | 2014-11-25 | 2014-11-25 | The charged background noise pick-up unit of a kind of distribution cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110554281A (en) * | 2019-08-26 | 2019-12-10 | 广州供电局有限公司 | Inspection method, maintenance method and inspection system for electrical equipment |
-
2014
- 2014-11-25 CN CN201420715701.9U patent/CN204177874U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110554281A (en) * | 2019-08-26 | 2019-12-10 | 广州供电局有限公司 | Inspection method, maintenance method and inspection system for electrical equipment |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |