CN202678075U - Transformer equipped with built-in sensors - Google Patents
Transformer equipped with built-in sensors Download PDFInfo
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- CN202678075U CN202678075U CN 201220291208 CN201220291208U CN202678075U CN 202678075 U CN202678075 U CN 202678075U CN 201220291208 CN201220291208 CN 201220291208 CN 201220291208 U CN201220291208 U CN 201220291208U CN 202678075 U CN202678075 U CN 202678075U
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Abstract
The utility model relates to the field of transformer condition monitoring and condition-based maintenance, in particular to a transformer equipped with built-in sensors. The transformer comprises a transformer body and the built-in sensors, and the transformer body consists of an oil tank, an upper clamping piece, a lower clamping piece, a cushion block, an iron core and a winding; ultrasonic supports are arranged on the high voltage side of a long axial surface and the two short axial surface of the transformer body; six ultrasonic sensors are arranged inside the ultrasonic supports; the ultrasonic supports are installed and fixed through ultrasonic sensor fixing brackets arranged on the inner wall of the oil tank; three vibration sensors are arranged on the upper clamping piece and the lower clamping piece; and a high frequency current transformer (HFCT) is arranged at the place of an iron core grounding wire inside the transformer body. According to the utility model, the flexibility and the effectiveness of online monitoring are further improved and the operational safety level of the transformer is improved.
Description
Technical field
The utility model relates to Transformer's Condition Monitoring, repair based on condition of component field, relates in particular to a kind of transformer that possesses built-in sonac, vibrating sensor, HFCT transducer (High Frequency Current Sensor).
Background technology
Be very important equipment in the electric power system with the converting equipment headed by the transformer, its running status directly affects Security of the 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, because China's monitoring technology is started late, the product of most domestic producer all is the product of imitation and foreign, Practical Performance aspect shortcoming, more lacking simultaneously corresponding checkout gear and testing agency tests to the performance of existing on-Line Monitor Device and tests, cause the monitoring result of on-line monitoring equipment to thoroughly believe, the reliability of device own belittles, and had a strong impact on the application of on-line monitoring technique in intelligent grid is built.
According to the knowledge of the applicant, the transformer monitoring technology is not yet ripe at present, and most of installation of sensors is outside at transformer, poor anti jamming capability, and sensitivity is low, has become the bottleneck of Condition-based Maintenance of Substation Equipment technical development, has seriously restricted the development that intelligent grid is built.For example: it is difficult that partial discharge ultrasonic measurement poor anti jamming capability, breakdown location and diagnosis accuracy are not, electric discharge type is identified; Vibrating sensor can only be monitored the vibration of tank surface and can not directly be reflected the vibration problem of transformer inside.Therefore be badly in need of the various signals of transducer is built-in, more direct, more effective receiving transformer inside, promote the status monitoring level.
Summary of the invention
The purpose of this utility model is to overcome the shortcoming of prior art, and a kind of transformer that possesses built-in sensors is provided, and further improves sensitivity and the validity of on-line monitoring, promotes the transformer safety operation level.
For solving above technical problem, the technical solution of the utility model is: a kind of transformer that possesses built-in sensors, its difference is: it comprises transformer body, built-in sensors, described transformer body comprises fuel tank, upper clamping piece, lower clamping piece, cushion block, iron core, winding, be provided with ultrasound stent on two brchypinacoids of the high-pressure side of transformer body macropinacoid and transformer body, built-in No. 6 sonacs for realizing transformer inside partial discharge defective is monitored of described ultrasound stent, ultrasound stent is installed fixing by the sonac fixed support of described inner wall of oil tank setting, described upper clamping piece, be provided with on the lower clamping piece for No. 3 vibrating sensors of realizing that internal vibration is measured, the iron core grounding line place of described transformer body inside is provided with the HFCT transducer of monitoring for to transformer inside partial discharge defective.
By above scheme, described ultrasound stent is used for fixedly by two that the epoxy plate of sonac forms, and is provided with fastening bolt holes and sonac installing hole on the epoxy plate.
By above scheme, be provided with the sensor signal lines fixed support for the fixation of sensor holding wire between described upper clamping piece, the lower clamping piece.
By above scheme, described transformer body top is provided with the drum that goes out for the sensor signal lines outlet.
The contrast prior art, beneficial features of the present utility model is: the power transformer of built-in multiple sensors, be conducive to the research of converting equipment running status on-line monitoring technique, can provide accurately and effectively Monitoring Data for the converting equipment on-Line Monitor Device, strengthen the credibility of on-Line Monitor Device, reduce the cost of grid maintenance, ensure the converting equipment safe operation.
Description of drawings
Fig. 1 is the utility model embodiment overall structure schematic diagram;
Fig. 2 is the ultrasound stent epoxy plate schematic diagram of the utility model embodiment;
Fig. 3 is the ultrasound stent vertical view of the utility model embodiment;
Fig. 4 is the sonac scheme of installation of the utility model embodiment;
Fig. 5 is the vibrating sensor scheme of installation of the utility model embodiment;
Fig. 6 is the HFCT installation of sensors schematic diagram one of the utility model embodiment;
Fig. 7 is the HFCT installation of sensors schematic diagram two of the utility model embodiment;
Fig. 8 is the sensor signal lines fixed support schematic diagram of the utility model embodiment;
Fig. 9 is the sensor signal lines outlet schematic diagram of the utility model embodiment;
Figure 10 be the utility model embodiment go out drum Facad structure schematic diagram;
Figure 11 be the utility model embodiment go out drum reverse side structural representation;
Wherein: 1-fuel tank, 2-upper clamping piece, 3-lower clamping piece, 4-cushion block, 5-iron core, 6-winding, 7-earth connection sleeve pipe, 8-sonac, 9-vibrating sensor, 10-HFCT transducer, 11-iron core grounding line, 12-go out drum, 13-epoxy plate, 13-1-epoxy plate header board, plate behind 13-2-epoxy plate, 14-fastening bolt holes, 15-sonac installing hole, 16-sonac fixed support, 17-vibrating sensor installing hole, 18-sensor signal lines, 19-sensor signal lines fixed support, 20-A phase winding, 21-B phase winding, 22-C phase winding, 23-ultrasonic BNC connector, 24-vibration BNC connector, 25-HFCT BNC connector, 26-ultrasonic sub-miniature A connector, 27-bushing, 28-low-tension bushing.
Embodiment
By reference to the accompanying drawings the utility model is described in further detail below by embodiment.
Please refer to Fig. 1, the utility model possesses the transformer of built-in sensors, it comprises transformer body, built-in sensors, transformer body comprises fuel tank 1, upper clamping piece 2, lower clamping piece 3, cushion block 4, iron core 5, winding 6, be provided with ultrasound stent on two brchypinacoids of the high-pressure side of transformer body macropinacoid and transformer body, built-in No. 6 sonacs 8 for realizing transformer inside partial discharge defective is monitored of ultrasound stent, ultrasound stent is installed fixing by the sonac fixed support 16 of described fuel tank 1 inwall setting, upper clamping piece 2, be provided with on the lower clamping piece 3 for No. 3 vibrating sensors 9 of realizing that internal vibration is measured, iron core grounding line 11 places of transformer body inside are provided with the HFCT transducer 10 of monitoring for to transformer inside partial discharge defective.
Concrete, ultrasound stent is used for fixedly by two that the epoxy plate 13 of sonac 8 forms, and is provided with fastening bolt holes 14 and sonac installing hole 15 on the epoxy plate 13.
Concrete, be provided with the sensor signal lines fixed support 19 for fixation of sensor holding wire 18 between upper clamping piece 2, the lower clamping piece 3.
Concrete, the transformer body top is provided with and goes out drum 12 for the sensor signal lines outlet.
The utility model general structure also comprises sleeve pipe (earth connection sleeve pipe 7, bushing 27, low-tension bushing 28), off circuit tap changer, fin except comprising above-mentioned transformer body and built-in sensors.The part such as transformer body, sleeve pipe, off circuit tap changer, fin is according to the standard design such as GB1094.1, GB1094.2, GB1094.3, GB1094.5 and manufacturing.
(a) built-in sonac
The purpose of built-in sonac:
Built-in sonac can be monitored the partial discharge defective of transformer inside, and passes through the combined measurement of No. 6 sonacs, can realize the accurate location to local spark location.
The advantage of built-in sonac:
Built-in sonac has higher sensitivity.Common external sonac is pasted on tank envelope, but the ultrasonic signal that partial discharge produces is delivered to the transducer decay greatly through insulating oil and fuel tank steel plate, and built-in sonac from signal source more close to, therefore the signal attenuation that receives is less, the remolding sensitivity external is high.When built-in sonac, take fuel tank macropinacoid (high-pressure side) lower left corner as the origin of coordinates, demarcate the relative coordinate of each transducer in fuel tank.By analyzing the time-delay waveform of 6 road ultrasonic signals, can determine that Partial Discharge Sources arrives the distance of each transducer, in conjunction with coordinate information, can orient the accurate locus of partial discharge point in the fuel tank.
Sonac is installed, and such as Fig. 2, Fig. 3, shown in Figure 4, concrete steps are as follows:
1) sonac 8 is inserted in the sonac installing hole 15 of epoxy plate header board 13-1, can selects according to actual needs different installing holes, to regulate the horizontal level of installation of sensors;
2) plate 13-2 behind epoxy plate header board 13-1 and the epoxy plate is connected by the fastening bolt at two ends, sonac 8 is fixedly clamped;
3) by the fastening bolt at epoxy plate middle part, the sonac support is fixed on the sonac fixed support 16 of inner wall of oil tank, and can be according to actual needs, manual adjustments sonac support installation site in the vertical direction.
(b) built-in vibrating sensor
The purpose of built-in vibrating sensor:
Built-in vibrating sensor purpose is to gather the vibration signal of iron core and winding in the transformer running, the running status of assessment and analysis transformer.
The advantage of built-in vibrating sensor:
The vibration source of transformer mainly comprises core vibration, basket vibration and cooling system vibration.Core vibration mainly is because the magnetic hysteresis flex effect of silicon steel sheet causes, basket vibration mainly is that core vibration and basket vibration can reflect the running status of transformer because the electric power between wire causes.The vibration of transformer is mainly caused by winding and iron core, is delivered on transformer oil and the tank wall by various path.The vibration of winding mainly is that the insulating oil by transformer reaches tank wall; 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 route of transmission-pass to fuel tank by insulating oil.Because the vibration signal of transformer body can be propagated along various approach, cause the vibration signal of transformer oil box outer wall can not directly reflect the Vibration Condition of inner iron core and winding.
Traditional external vibrating sensor is pasted on transformer case, and its vibration signal that receives can't directly reflect the vibrational state of iron core and winding.And built-in vibrating sensor is installed on the folder from top to bottom, can directly measure the vibration data of iron core and winding, reflects more really the running status of iron core and winding.
Vibrating sensor is installed, and as shown in Figure 5, concrete steps are as follows:
1) open five vibrating sensor installing holes 17 at upper clamping piece 2, lower clamping piece 3 respectively, and tapping.Five vibrating sensor installing holes 17 lay respectively at folder head end, folder end, A phase winding 20 ends, B phase winding 21 ends, C phase winding 22 ends;
2) at vibrating sensor 9 mounting screw heads, screw in installing hole, carry and fasten.
(c) built-in HFCT transducer
The purpose of built-in HFCT transducer:
Built-in its purpose of HFCT transducer is to monitor the partial discharge defective of transformer inside.The partial discharge of transformer inside can cause on the iron core grounding line and high-frequency pulse current occurs, can monitor this high-frequency pulse current by the HFCT transducer, to reach the purpose of monitoring partial discharge.
The advantage of built-in HFCT transducer:
Traditional external HFCT transducer generally adopts the punching mode to be installed in transformer core grounding line place (fuel tank is outer) or bottom shielding of bushing earth connection place.Because the electromagnetic environment complexity is larger in the transformer station, the space interference accurately gathers high-frequency pulse current to the HFCT transducer larger impact, even can't to differentiate the data that collect be Partial discharge signal or interference signal.
Disturb because oil tank of transformer can shield most space, thereby the high-frequency pulse current that built-in HFCT transducer collects is more accurate in the iron core grounding line place of built-in HFCT installation of sensors in fuel tank.Although there is leakage field in transformer inside, also can produce disturb the HFCT transducer, this interfering frequency is lower, is easy to itself and the high-frequency pulse current of innings putting generation are separated.
The HFCT installation of sensors, such as Fig. 6, shown in Figure 7:
1) opens the screw of a M6 specification at upper clamping piece 2, HFCT transducer 10 terminal binding posts (M6 internal thread) are screwed in this screw, carry and fasten;
2) iron core grounding line 11 is passed the gauge hole of HFCT transducer 10, and draw ground connection from fuel tank 1 top through the earth connection sleeve pipe.
(d) sensor signal lines is fixed
Purpose:
The potential safety hazard that its purpose of fixation of sensor holding wire is to avoid the swing of holding wire in transportation and running that transformer and transducer itself are caused.
Concrete steps are as shown in Figure 8:
1) opens the screw of M6 specification at upper clamping piece 2, lower clamping piece 3, with screw sensor signal lines fixed support 19 is installed between folder from top to bottom;
2) be fixed on the sensor signal lines fixed support 19 with oil resistant, the corrosion resistant sensor signal lines 18 of being with vibrating sensor and HFCT transducer of tying.
(e) sensor signal lines outlet
Purpose:
The purpose of sensor signal lines outlet is to make transducer can connect easily monitoring equipment, acquisition state data.
Concrete steps such as Fig. 9, Figure 10, shown in Figure 11:
1) makes transducer and go out drum 12, go out 12 positive being used for of drum and connect monitoring equipments, go out drum 12 back sides and be used for connecting built-in sensors, corresponding UNICOM between front and the piggyback connector.Go out 12 BNC connectors of drum 12 positive installations, wherein 6 ultrasonic BNC connectors 23 are used for connection vibration acquisition equipment, 3 HFCT BNC connectors 25 for connection HFCT collecting device for connection ultrasound acquisition equipment, 3 vibration BNC connectors 24; Go out the drum back side 6 ultrasonic sub-miniature A connectors 26,3 vibration BNC connectors 24,3 HFCT BNC connectors 25 are installed;
2) each built-in sensors holding wire is inserted out binding post corresponding to drum 12 back sides;
3) will go out drum 12 and be installed on fuel tank 1 cover plate.
Above content is in conjunction with concrete execution mode further detailed description of the utility model, can not assert that implementation of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.
Claims (4)
1. transformer that possesses built-in sensors, it is characterized in that: it comprises transformer body, built-in sensors, described transformer body comprises fuel tank, upper clamping piece, lower clamping piece, cushion block, iron core, winding, be provided with ultrasound stent on two brchypinacoids of the high-pressure side of transformer body macropinacoid and transformer body, built-in No. 6 sonacs for realizing transformer inside partial discharge defective is monitored of described ultrasound stent, ultrasound stent is installed fixing by the sonac fixed support of described inner wall of oil tank setting, described upper clamping piece, be provided with on the lower clamping piece for No. 3 vibrating sensors of realizing that internal vibration is measured, the iron core grounding line place of described transformer body inside is provided with the HFCT transducer of monitoring for to transformer inside partial discharge defective.
2. the transformer that possesses built-in sensors as claimed in claim 1 is characterized in that: described ultrasound stent is used for fixedly by two that the epoxy plate of sonac forms, and is provided with fastening bolt holes and sonac installing hole on the epoxy plate.
3. the transformer that possesses built-in sensors as claimed in claim 1 is characterized in that: be provided with the sensor signal lines fixed support for the fixation of sensor holding wire between described upper clamping piece, the lower clamping piece.
4. such as claim 1 or the 2 or 3 described transformers that possess built-in sensors, it is characterized in that: described transformer body top is provided with the drum that goes out for the sensor signal lines outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220291208 CN202678075U (en) | 2012-06-20 | 2012-06-20 | Transformer equipped with built-in sensors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220291208 CN202678075U (en) | 2012-06-20 | 2012-06-20 | Transformer equipped with built-in sensors |
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| Publication Number | Publication Date |
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| CN202678075U true CN202678075U (en) | 2013-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220291208 Expired - Fee Related CN202678075U (en) | 2012-06-20 | 2012-06-20 | Transformer equipped with built-in sensors |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709037A (en) * | 2012-06-20 | 2012-10-03 | 湖北省电力公司电力试验研究院 | Transformer with built-in transducer |
| CN105513754A (en) * | 2016-01-20 | 2016-04-20 | 江苏铭安电气有限公司 | Single-phase oil-immersed transformer and monitoring system thereof |
| CN107389791A (en) * | 2017-06-27 | 2017-11-24 | 浙江大学 | The structure and method of the external vibration-testing method detection telescopic splice of grouting behind shaft or drift lining |
| CN108269680A (en) * | 2018-01-23 | 2018-07-10 | 华北电力大学（保定） | A kind of wall-attaching type sonac arrangement |
-
2012
- 2012-06-20 CN CN 201220291208 patent/CN202678075U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709037A (en) * | 2012-06-20 | 2012-10-03 | 湖北省电力公司电力试验研究院 | Transformer with built-in transducer |
| CN102709037B (en) * | 2012-06-20 | 2016-08-17 | 国家电网公司 | A kind of transformator possessing built-in sensors |
| CN105513754A (en) * | 2016-01-20 | 2016-04-20 | 江苏铭安电气有限公司 | Single-phase oil-immersed transformer and monitoring system thereof |
| CN107389791A (en) * | 2017-06-27 | 2017-11-24 | 浙江大学 | The structure and method of the external vibration-testing method detection telescopic splice of grouting behind shaft or drift lining |
| CN107389791B (en) * | 2017-06-27 | 2023-04-07 | 浙江大学 | Structure and method for detecting post-grouting sleeve type steel bar joint by external vibration test method |
| CN108269680A (en) * | 2018-01-23 | 2018-07-10 | 华北电力大学（保定） | A kind of wall-attaching type sonac arrangement |
| CN108269680B (en) * | 2018-01-23 | 2019-08-23 | 华北电力大学（保定） | A kind of wall-attaching type ultrasonic sensor arragement construction |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 430077, 361 East Main Street, Wuchang District, Hubei, Wuhan Patentee after: Hubei Electric Power Research Institute of Power Company Patentee after: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Address before: 430077, 361 East Main Street, Wuchang District, Hubei, Wuhan Patentee before: Hubei Electric Power Testing & Research Institute, Hubei Electric Power Company Patentee before: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20200620 |