CN102709037B - A kind of transformator possessing built-in sensors - Google Patents
A kind of transformator possessing built-in sensors Download PDFInfo
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- CN102709037B CN102709037B CN201210204537.0A CN201210204537A CN102709037B CN 102709037 B CN102709037 B CN 102709037B CN 201210204537 A CN201210204537 A CN 201210204537A CN 102709037 B CN102709037 B CN 102709037B
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- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 30
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000002828 fuel tank Substances 0.000 claims abstract description 19
- 238000002604 ultrasonography Methods 0.000 claims abstract description 18
- 238000004804 winding Methods 0.000 claims abstract description 18
- 239000004593 Epoxy Substances 0.000 claims description 14
- 230000007547 defect Effects 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 abstract description 13
- 238000010586 diagram Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000012806 monitoring device Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The present invention relates to Transformer's Condition Monitoring, repair based on condition of component field, particularly relate to a kind of transformator possessing built-in sensors, it includes transformer body, built-in sensors, described transformer body includes fuel tank, upper clamping piece, lower clamping piece, cushion block, ferrum core, winding, it is provided with ultrasound stent on the high-pressure side of transformer body macropinacoid and the two of transformer body brchypinacoids, built-in No. 6 sonacs of described ultrasound stent, ultrasound stent carries out installing by the sonac fixed support that described inner wall of oil tank is arranged fixes, described upper clamping piece, No. 3 vibrating sensors it are provided with on lower clamping piece, it is provided with HFCT sensor at iron core grounding line within described transformer body.The present invention improves susceptiveness and the effectiveness of on-line monitoring further, promotes transformer safety operation level.
Description
Technical field
The present invention relates to Transformer's Condition Monitoring, repair based on condition of component, particularly relate to one and possess built-in sonac, vibrating sensor, the transformator of HFCT sensor (High Frequency Current Sensor).
Background technology
Converting equipment headed by transformator is very important equipment in power system, and its running status directly affects the safety of system.Along with the iterative method of strong intelligent grid building-up work, in recent years, increasing condition monitoring device is applied to transformer station, is used for monitoring converting equipment running status.But, owing to China's monitoring technology is started late, the product of most domestic producer is all to imitate and the product of foreign, Practical Performance aspect is short of, the most more lack corresponding detection device and the performance of existing on-Line Monitor Device is tested and tests by testing agency, the monitoring result causing on-line monitoring equipment cannot thoroughly believe, the reliability of device own is belittled, and has had a strong impact on on-line monitoring technique application in intelligent grid is built.
As far as the applicant is aware, transformer monitoring technology is the most ripe at present, major part sensor is arranged on outside transformator, poor anti jamming capability, and sensitivity is low, it has also become the bottleneck of Condition-based Maintenance of Substation Equipment technology development, seriously constrains the development that intelligent grid is built.Such as: shelf depreciation ultrasonic measurement poor anti jamming capability, breakdown location and diagnosis accuracy are inadequate, electric discharge type identification is difficult；Vibrating sensor can only be monitored the vibration of tank surface and can not directly be reflected the vibration problem of inside transformer.Therefore it is badly in need of sensor built-in, the various signals more directly, within more effective receiving transformer, promote status monitoring level.
Summary of the invention
It is an object of the invention to overcome the shortcoming of prior art, it is provided that a kind of transformator possessing built-in sensors, improve susceptiveness and the effectiveness of on-line monitoring further, promote transformer safety operation level.
nullFor solving above technical problem，The technical scheme is that a kind of transformator possessing built-in sensors，Its difference is: it includes transformer body、Built-in sensors，Described transformer body includes fuel tank、Upper clamping piece、Lower clamping piece、Cushion block、Iron core、Winding，It is provided with ultrasound stent on the high-pressure side of transformer body macropinacoid and the two of transformer body brchypinacoids，Built-in No. 6 sonacs inside transformer shelf depreciation defect being monitored for realization of described ultrasound stent，Ultrasound stent carries out installing by the sonac fixed support that described inner wall of oil tank is arranged fixes，Described upper clamping piece、It is provided with on lower clamping piece for realizing No. 3 vibrating sensors that internal vibration is measured，The HFCT sensor for inside transformer shelf depreciation defect is monitored it is provided with at iron core grounding line within described transformer body.
By above scheme, described ultrasound stent is formed for fixing the epoxy plate of sonac by two pieces, epoxy plate is provided with fastening bolt holes and sonac installing hole.
By above scheme, between described upper clamping piece, lower clamping piece, it is provided with the sensor signal lines fixed support for fixing sensor signal lines.
By above scheme, described transformer body top is provided with and goes out drum for sensor signal lines outlet.
Contrast prior art, the beneficial features of the present invention is: the power transformer of built-in multiple sensors, be conducive to the research of converting equipment running status on-line monitoring technique, can be that converting equipment on-Line Monitor Device provides Monitoring Data accurately and effectively, strengthen the credibility of on-Line Monitor Device, reduce the cost of grid maintenance, ensure converting equipment safe operation.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention overall structure schematic diagram；
Fig. 2 is the ultrasound stent epoxy plate schematic diagram of the embodiment of the present invention；
Fig. 3 is the ultrasound stent top view of the embodiment of the present invention；
Fig. 4 is the sonac scheme of installation of the embodiment of the present invention；
Fig. 5 is the vibrating sensor scheme of installation of the embodiment of the present invention；
Fig. 6 is the HFCT sensor scheme of installation one of the embodiment of the present invention；
Fig. 7 is the HFCT sensor scheme of installation two of the embodiment of the present invention；
Fig. 8 is the sensor signal lines fixed support schematic diagram of the embodiment of the present invention；
Fig. 9 is the sensor signal lines outlet schematic diagram of the embodiment of the present invention；
Figure 10 be the embodiment of the present invention go out drum Facad structure schematic diagram；
Figure 11 be the embodiment of the present invention go out drum inverse layer structure schematic diagram；
nullWherein: 1 fuel tank、2 upper clamping pieces、3 lower clamping pieces、4 cushion blocks、5 iron cores、6 windings、7 earth lead sleeve pipes、8 sonacs、9 vibrating sensors、10 HFCT sensors、11 iron core grounding lines、12 go out drum、13 epoxy plates、13-1 epoxy plate header board、13-2 epoxy plate back plate、14 fastening bolt holes、15 sonac installing holes、16 sonac fixed supports、17 vibrating sensor installing holes、18 sensor signal lines、19 sensor signal lines fixed supports、20 A phase windings、21 B phase windings、22 C phase windings、23 ultrasonic BNC connectors、24 vibration BNC connectors、25 HFCT BNC connectors、26 ultrasonic sub-miniature A connectors、27 bushings、28 low-tension bushings.
Detailed description of the invention
Combine accompanying drawing below by detailed description of the invention the present invention is described in further detail.
Refer to Fig. 1, the present invention possesses the transformator of built-in sensors, it includes transformer body, built-in sensors, transformer body includes fuel tank 1, upper clamping piece 2, lower clamping piece 3, cushion block 4, iron core 5, winding 6, it is provided with ultrasound stent on the high-pressure side of transformer body macropinacoid and the two of transformer body brchypinacoids, built-in No. 6 sonacs 8 inside transformer shelf depreciation defect being monitored for realization of ultrasound stent, ultrasound stent carries out installing by the sonac fixed support 16 that described fuel tank 1 inwall is arranged fixes, upper clamping piece 2, it is provided with for realizing No. 3 vibrating sensors 9 that internal vibration is measured on lower clamping piece 3, the HFCT sensor 10 for inside transformer shelf depreciation defect is monitored it is provided with at iron core grounding line 11 within transformer body.
Concrete, ultrasound stent is formed for fixing the epoxy plate 13 of sonac 8 by two pieces, and epoxy plate 13 is provided with fastening bolt holes 14 and sonac installing hole 15.
Concrete, it is provided with the sensor signal lines fixed support 19 for fixing sensor signal lines 18 between upper clamping piece 2, lower clamping piece 3.
Concrete, transformer body top is provided with and goes out drum 12 for sensor signal lines outlet.
Population structure of the present invention, in addition to including above-mentioned transformer body and built-in sensors, also includes sleeve pipe (earth lead sleeve pipe 7, bushing 27, low-tension bushing 28), off circuit tap changer, fin.The part such as transformer body, sleeve pipe, off circuit tap changer, fin designs according to standards such as GB1094.1, GB1094.2, GB1094.3, GB1094.5 and manufactures.
(a) built-in sonac
The purpose of built-in sonac:
Built-in sonac can monitor the shelf depreciation defect of inside transformer, and by the combined measurement of No. 6 sonacs, it is possible to achieve local spark location is accurately positioned.
The advantage of built-in sonac:
Built-in sonac has higher susceptiveness.Common external sonac is pasted on tank envelope, but it is big that the ultrasonic signal that shelf depreciation produces is delivered to sensor decay through insulating oil and fuel tank steel plate, and built-in sonac from signal source closer to, therefore the signal attenuation received is less, and remolding sensitivity external is high.When built-in sonac, with fuel tank macropinacoid (high-pressure side) lower left corner as zero, demarcate each sensor relative coordinate in fuel tank.By analyzing the time delay waveform of 6 road ultrasonic signals, it may be determined that Partial Discharge Sources to the distance of each sensor, in conjunction with coordinate information, the accurate spatial locations of shelf depreciation point in fuel tank can be oriented.
Sonac is installed, and as shown in Figure 2, Figure 3, Figure 4, specifically comprises the following steps that
1) sonac 8 is inserted in the sonac installing hole 15 of epoxy plate header board 13-1, different installing holes can be selected according to actual needs, to regulate the horizontal level that sensor is installed；
2) being attached by the fastening bolt at two ends with epoxy plate back plate 13-2 by epoxy plate header board 13-1, be fixedly clamped sonac 8；
3) by the fastening bolt in the middle part of epoxy plate, sonac support is fixed on the sonac fixed support 16 of inner wall of oil tank, and can according to actual needs, manually regulation sonac support is in the installation site of vertical direction.
(b) built-in vibrating sensor
The purpose of built-in vibrating sensor:
Built-in vibrating sensor purpose is to gather iron core and the vibration signal of winding in transformator running, analyzes and assess the running status of transformator.
The advantage of built-in vibrating sensor:
The vibration source of transformator mainly includes core vibration, basket vibration and cooling system vibration.Core vibration causes mainly due to the magnetic hysteresis flex effect of stalloy, and basket vibration causes mainly due to the electric power between wire, and core vibration and basket vibration can reflect the running status of transformator.The vibration of transformator is mainly caused by winding and iron core, is delivered on transformer oil and tank wall by various different paths.The vibration of winding mainly reaches tank wall by the insulating oil of transformator；The vibration of iron core passes to fuel tank by two approach, and one is solid route of transmission-reach tank wall by its cushion block；Another is liquid transmissive approach-pass to fuel tank by insulating oil.Owing to the vibration signal of transformer body can be propagated along various approach, the vibration signal of transformer oil box outer wall is caused can not directly to reflect the Vibration Condition of inner-core and winding.
Traditional external vibrating sensor is pasted on transformer case, and its vibration signal received cannot directly reflect the vibrational state of iron core and winding.And built-in vibrating sensor is arranged on folder from top to bottom, it is possible to directly measure iron core and the vibration data of winding, more really reflection iron core and the running status of winding.
Vibrating sensor is installed, as it is shown in figure 5, specifically comprise the following steps that
1) on upper clamping piece 2, lower clamping piece 3, five vibrating sensor installing holes 17 are opened respectively, and tapping.Five vibrating sensor installing holes 17 lay respectively at folder head end, folder end, A phase winding 20 end, B phase winding 21 end, C phase winding 22 end；
2) at vibrating sensor 9 mounting screw head, screw in installing hole, carry and fasten.
(c) built-in HFCT sensor
The purpose of built-in HFCT sensor:
Built-in HFCT sensor its object is to monitor the shelf depreciation defect of inside transformer.The shelf depreciation of inside transformer can cause and high-frequency pulse current occurs on iron core grounding line, can monitor this high-frequency pulse current by HFCT sensor, to reach to monitor the purpose of shelf depreciation.
The advantage of built-in HFCT sensor:
Traditional external HFCT sensor typically uses punching mode to be arranged at transformer core grounding line at (fuel tank is outer) or bottom shielding of bushing earth lead.Owing in transformer station, electromagnetic environment complexity is relatively big, spatial interference has large effect to HFCT sensor accurate acquisition high-frequency pulse current, even cannot resolving acquisition to data be Partial discharge signal or interference signal.
At the iron core grounding line that built-in HFCT sensor is arranged in fuel tank, owing to oil tank of transformer can shield most spatial interference, thus the high-frequency pulse current that built-in HFCT sensor acquisition arrives is more accurate.Although inside transformer exists leakage field, also HFCT sensor can be produced interference, but this interfering frequency is relatively low, it is easy to the high-frequency pulse current that it is put generation with office separates.
HFCT sensor is installed, as shown in Figure 6, Figure 7:
1) on upper clamping piece 2, open the screw of a M6 specification, HFCT sensor 10 end binding post (M6 female thread) is screwed in this screw, carries and fasten；
2) iron core grounding line 11 is passed the gauge hole of HFCT sensor 10, and draws ground connection from the grounded thread casing in fuel tank 1 top.
D () sensor signal lines is fixed
Purpose:
Fixing sensor signal lines its object is to the potential safety hazard avoiding holding wire swing in transport and running to cause transformator and sensor itself.
Concrete steps are as shown in Figure 8:
1) on upper clamping piece 2, lower clamping piece 3, open the screw of M6 specification, with screw, sensor signal lines fixed support 19 is arranged between folder from top to bottom；
2) with oil resistant, corrosion resistant band of tying, the sensor signal lines 18 of vibrating sensor and HFCT sensor is fixed on sensor signal lines fixed support 19.
The outlet of (e) sensor signal lines
Purpose:
The purpose of sensor signal lines outlet is to enable the sensor to connect easily monitoring device, acquisition state data.
Concrete steps are as shown in Fig. 9, Figure 10, Figure 11:
1) make sensor and go out drum 12, go out drum 12 front for connecting monitoring device, go out drum 12 back side for connecting built-in sensors, corresponding UNICOM between front with piggyback connector.Going out drum 12 front and install 12 BNC connectors, wherein 6 ultrasonic BNC connectors 23 are used for connecting ultrasound acquisition equipment, 3 vibration BNC connectors 24 for connecting vibration acquisition equipment, 3 HFCT BNC connectors 25 for connecting HFCT collecting device；Go out the drum back side and 6 ultrasonic sub-miniature A connectors 26,3 vibration 24,3 HFCT BNC connectors 25 of BNC connector are installed；
2) each built-in sensors holding wire is inserted out the binding post that drum 12 back side is corresponding；
3) drum 12 will be gone out and be installed on fuel tank 1 cover plate.
Above content is to combine specific embodiment further description made for the present invention, it is impossible to assert the present invention be embodied as be confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, it is also possible to make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (1)
1. the transformator possessing built-in sensors, it is characterized in that: it includes transformer body, built-in sensors, described transformer body includes fuel tank, upper clamping piece, lower clamping piece, cushion block, ferrum core, winding, it is provided with ultrasound stent on the high-pressure side of transformer body macropinacoid and the two of transformer body brchypinacoids, built-in No. 6 sonacs inside transformer shelf depreciation defect being monitored for realization of described ultrasound stent, ultrasound stent carries out installing by the sonac fixed support that described inner wall of oil tank is arranged fixes, described upper clamping piece, it is provided with for realizing No. 3 vibrating sensors that internal vibration is measured on lower clamping piece, the HFCT sensor for inside transformer shelf depreciation defect is monitored it is provided with at iron core grounding line within described transformer body；When built-in sonac, with the lower left corner, high-pressure side of fuel tank macropinacoid as zero, demarcate each sensor relative coordinate in fuel tank, by analyzing the time delay waveform of 6 road ultrasonic signals, determine that Partial Discharge Sources arrives the distance of each sensor, in conjunction with coordinate information, the accurate spatial locations of shelf depreciation point in fuel tank can be oriented；Described ultrasound stent is formed for fixing the epoxy plate of sonac by two pieces, and epoxy plate is provided with fastening bolt holes and sonac installing hole；The sensor signal lines fixed support for fixing sensor signal lines it is provided with between described upper clamping piece, lower clamping piece；Described transformer body top is provided with and goes out drum for sensor signal lines outlet.
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| CN201210204537.0A CN102709037B (en) | 2012-06-20 | 2012-06-20 | A kind of transformator possessing built-in sensors |
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| CN201210204537.0A CN102709037B (en) | 2012-06-20 | 2012-06-20 | A kind of transformator possessing built-in sensors |
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| CN102709037B true CN102709037B (en) | 2016-08-17 |
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Inventor after: Zhou Youbin Inventor after: Sun Hao Inventor after: Gu Ran Inventor after: Ruan Ling Inventor after: Xie Qijia Inventor after: Nie Dexin Inventor after: Wu Zhirong Inventor after: Lu Wenhua Inventor after: Zhang Hailong Inventor after: Du Wei Inventor after: Fang Chao Inventor before: Xie Qijia Inventor before: Gu Ran Inventor before: Ruan Ling Inventor before: Nie Dexin Inventor before: Wu Zhirong Inventor before: Lu Wenhua Inventor before: Zhang Hailong Inventor before: Du Wei Inventor before: Fang Chao Inventor before: Sun Hao |
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Effective date of registration: 20131210 Address after: 100000 Beijing West Chang'an Avenue No. 86 Applicant after: State Grid Corporation of China Applicant after: State Grid Hubei Electric Power Company Electric Power Technology Research Institute Applicant after: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Address before: 100000 Beijing West Chang'an Avenue No. 86 Applicant before: State Grid Corporation of China Applicant before: Hubei Electric Power Research Institute of Power Company Applicant before: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute |
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