CN208506188U - A kind of built-in SF6 gas-insulated transformer partial discharge monitoring system - Google Patents
A kind of built-in SF6 gas-insulated transformer partial discharge monitoring system Download PDFInfo
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- CN208506188U CN208506188U CN201820359138.4U CN201820359138U CN208506188U CN 208506188 U CN208506188 U CN 208506188U CN 201820359138 U CN201820359138 U CN 201820359138U CN 208506188 U CN208506188 U CN 208506188U
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Abstract
The utility model provides a kind of built-in SF6 gas-insulated transformer partial discharge monitoring system comprising: it is installed on the hyperfrequency supersonic array partial discharge sensor module of SF6 gas-insulated transformer enclosure interior；The data acquisition card being installed on the tank wall interface board of SF6 gas-insulated transformer；The collected signal of miniature hyperfrequency supersonic array partial discharge sensor module is transmitted in the end intelligent electronic device of station after data acquisition card filters and amplifies；End intelligent electronic device of standing includes map generation module, spectrum analysis module, calculates locating module, information display module, wireless communication module and alarm module.The system is more accurate than traditional external partial discharge monitoring system, and the discharged condition of energy real-time monitoring inside transformer avoids failure Partial discharge signal by metal shell and shields brought missing inspection, finds defect in advance to avoid generation power grid accident.
Description
Technical field
The utility model relates to transformer monitoring technical field more particularly to a kind of built-in SF6 gas-insulated transformers
Partial discharge monitors system.
Background technique
SF6 gas-insulated transformer (GIT) have nonflammable non-explosive, flexible layout, land occupation less, maintenance it is small etc. excellent
Point, it is especially wide in urban distribution network development prospect, become the important technology equipment of some sensitive areas.
But with the promotion and application of GIT, GIT O&M also gradually exposes some problems in operation.Currently, GIT
High, medium voltage side is mostly enclosed cable outlet or GIS outlet, since GIT high, middle pressure are to do example in closed SF6 gas
It needs to carry out inflation/deflation to high-pressure side cylinder when row test, be varied considerably with the preventive trial of conventional oil-immersed transformer.?
After it puts into operation, under normal circumstances routine test only carry out the insulation resistance of winding and sleeve, iron core and folder, gas humidity and
Component test, it is difficult to realize and the effective technology of its state is supervised.
Due to the difference of dielectric and heat dissipation aspect, traditional oil immersed type transformer partial discharge on-line condition monitoring technology can not
It is directly applied on GIT, in particular for partial discharge performance on-line monitoring inside such as GIT.Current GIT both domestic and external is built-in
Monitoring device is mainly SF6 pressure gauge and density monitor, also has research to carry out external superfrequency partial discharge and monitors, but due to
GIT metal shell sealing performance is more excellent, and it is weak that superfrequency Partial discharge signal is transmitted to shell signal, and operating experience shows oil
Immersion transformer and the external superfrequency partial discharge detection validity of GIS device are markedly less than built-in sensor detection.Traditional oil immersion
Formula transformer built-in formula partial discharge monitoring device is generally from aperture in the installation of oil valve position or tank wall, and GIT is not due to having oil valve, simultaneously
Due to the requirement to SF6 pressure and leakproofness, the destruction caused by transformer body reliability is much higher than traditional oil immersion after aperture
Formula transformer.In view of above situation, developing can be by the check of GIT transformer gas pressure seal and inside
The system significance of partial discharge performance monitoring is outstanding.
Utility model content
Technical problem to be solved by the utility model is to provide a kind of built-in SF6 gas-insulated transformer partial discharges
Monitoring system solves the problems, such as that the regular prerun of SF6 gas-insulated transformer is difficult to detect built-in electrical insulation state.
In order to solve the above-mentioned technical problem, the utility model provides a kind of built-in SF6 gas-insulated transformer partial discharge prison
Examining system is installed on SF6 gas-insulated transformer, can include:
It is installed on the hyperfrequency supersonic array partial discharge sensor module of the SF6 gas-insulated transformer enclosure interior；
The data acquisition card being installed on the tank wall interface board of the SF6 gas-insulated transformer, the hyperfrequency ultrasound
Array partial discharge sensor module is connected to the data acquisition card by optical fiber；
The collected signal of the miniature hyperfrequency supersonic array partial discharge sensor module is snapped past by the signal acquisition
It is transmitted to after filter and amplification in the end intelligent electronic device of station；
The station end intelligent electronic device is aobvious comprising map generation module, spectrum analysis module, calculating locating module, information
Show module, wireless communication module and alarm module.
In an alternate embodiment of the invention, the built-in SF6 gas-insulated transformer partial discharge monitoring system by acquisition and is divided
The ultrasound that partial discharge position inside the SF6 gas-insulated transformer generates is analysed to put with ultra-high frequency signal to position the part
The position of electricity simultaneously determines the electric discharge type generated at the partial discharge position.
In an alternate embodiment of the invention, the electric discharge type includes needle plate electric discharge, creeping discharge and suspended discharge.
In an alternate embodiment of the invention, the miniature hyperfrequency supersonic array partial discharge sensor module is with a miniature hyperfrequency
Centered on partial discharge sensor, an annular ultrasonic sensing is installed on the annular border of the miniature ultrahigh frequency partial discharge sensor
Device array.
In an alternate embodiment of the invention, the ultrasonic sensor array of the annular is 12 array element structures, by 12 with model
Ultrasonic sensor is uniformly arranged according to clock mode.
In an alternate embodiment of the invention, the detection frequency band of the miniature ultrahigh frequency partial discharge sensor is 100-1500MHz.
In an alternate embodiment of the invention, the ultrasonic sensor uses import voltage-sensitive ceramic, and each array element spacing is half-wavelength
5mm。
In an alternate embodiment of the invention, the miniature hyperfrequency supersonic array partial discharge sensor module passes through quadravalence accumulation
Virtual extended characteristic carries out virtual extended to increase the aperture of the array.
In an alternate embodiment of the invention, it is arranged between the tank wall interface board and the SF6 gas-insulated transformer shell double
Layer sealing ring, is sealed using screw thread fixed connection mode.
In an alternate embodiment of the invention, the data acquisition card selects 16 tunnel synchronous collecting cards, by 16 core fibres with it is described
Miniature hyperfrequency supersonic array partial discharge sensor module is connected.
In an alternate embodiment of the invention, the filter range of the data acquisition card is 200k-20MHz.
In an alternate embodiment of the invention, the map generation module extracts local discharge characteristic value and life from receiving in signal
At corresponding shelf depreciation map.
In an alternate embodiment of the invention, the spectrum analysis module is by the shelf depreciation map of generation and existing typical case
Electric discharge map compares, and is gone out by phase, amplitude, discharge time, accumulated discharge energy and frequency energy section comprehensive judgement
The type of shelf depreciation belongs to any in needle plate electric discharge, creeping discharge and suspended discharge.
In an alternate embodiment of the invention, the calculating locating module utilizes the miniature ultrahigh frequency partial discharge sensor signal and institute
The case propagation delays for stating ultrasonic sensor array signal calculate the space length of the discharge position Yu the sensor module；It is logical
The algorithm for crossing arriving signal frequency difference calculates pitch angle of the discharge position relative to the sensor module；Pass through calculating
The obtained space length and the pitch angle carries out comprehensive positioning to the discharge position and generates located space spectrogram.
In an alternate embodiment of the invention, the information display module will collect the phase information, the amplitude of discharge position
And discharge time, the shelf depreciation map and located space spectrogram of generation, all kinds of letters such as electric discharge type determined
Breath is shown on the monitoring platform at the station end.
In an alternate embodiment of the invention, the electric discharge type result that the alarm module is determined according to the spectrum analysis module
Carry out broadcast alarm.
In an alternate embodiment of the invention, the warning message is transmitted to relevant people with short message mode by the wireless communication module
The mobile phone of member.
In summary, the beneficial effect of the utility model embodiment is: the built-in SF6 gas-insulated of the utility model
On Line PD Monitoring of Transformer system, on the one hand, can discharged condition inside real-time monitoring SF6 gas-insulated transformer；On the one hand, compared with
The partial discharge monitoring obtained result of system of traditional external is more accurate, while avoiding failure Partial discharge signal by metal shell
Missing inspection brought by shielding；On the one hand, defect can be found early early stage shelf depreciation occurs and handled, avoid partial discharge
Development causes SF6 gas-insulated transformer internal fault so as to cause power grid accident occurs.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of one embodiment of built-in SF6 gas-insulated transformer partial discharge monitoring system of the utility model
Illustrative view of functional configuration.
Fig. 2 is in a kind of one embodiment of built-in SF6 gas-insulated transformer partial discharge monitoring system of the utility model
The structural schematic diagram of hyperfrequency supersonic array partial discharge sensor module.
Specific embodiment
The explanation of following embodiment be with reference to attached drawing, can be to the particular implementation implemented to example the utility model
Example.
The embodiments of the present invention provide a kind of built-in SF6 gas-insulated transformer partial discharge monitoring system, can be in SF6
It is installed on SF6 gas-insulated transformer before gas-insulated transformer factory, monitors the functional structure of system as shown, can
Include:
It is mounted on the hyperfrequency supersonic array partial discharge sensor module 2 of the enclosure interior of SF6 gas-insulated transformer 1；Peace
Data acquisition card 4 on tank wall interface board 3 loaded on SF6 gas-insulated transformer 1；Connected with data acquisition card 3 by optical fiber cable 7
The station end intelligent electronic device 5 connect；
Wherein, end intelligent electronic device 5 of standing includes map generation module 51, spectrum analysis module 52, calculates locating module
53, information display module 54, wireless communication module 55 and alarm module 56；
Collected signal is transmitted to signal by 16 core fibres 6 and adopted by hyperfrequency supersonic array partial discharge sensor module 2
Truck 3, signal are filtered and are transmitted to after amplifying by data acquisition card 3 and parsed inside the end intelligent electronic device 5 of station.
The monitoring system can acquire and analyze 1 inside partial discharge position of SF6 gas-insulated transformer generation ultrasound and
Ultra-high frequency signal, to orient the position of shelf depreciation and determine that the electric discharge type generated at partial discharge position (put by needle plate
Electricity, creeping discharge and suspended discharge).
Further, as shown in Fig. 2, at the center of the hyperfrequency supersonic array partial discharge sensor module 2 in the monitoring system
For a miniature ultrahigh frequency partial discharge sensor 21；A ring is installed on the annular border of miniature ultrahigh frequency partial discharge sensor 21
Shape ultrasonic sensor array, the ring-shaped ultrasonic sensor array are uniformly arranged 12 according to clock mode and are passed with the ultrasonic of model
Sensor 22, to form the ring-shaped ultrasonic sensor array of 12 array elements；As an example, in the present embodiment, hyperfrequency ultrasound
The integral diameter of array partial discharge sensor module 2 is 100MM, and the Observational frequency band of miniature ultrahigh frequency partial discharge sensor 21 is 100-
1500MHz can be realized the function of interference signal always, and ultrasonic sensor 22 then uses import voltage-sensitive ceramic, so that array element
Spacing is half-wavelength 5mm.Design passes through the hyperfrequency supersonic array partial discharge sensor module 2 through this structure
The virtual extended characteristic of quadravalence accumulation carries out virtual extended to annular array, and the array aperture after extension will greatly increase,
Simultaneously can to avoid sensor in inside transformer longtime running (30 years) individual defects and influence sensor array effect.
Further, transformer box wall interface board 3 is mounted on as 1 internal/external signal transmission channel of SF6 gas-insulated transformer
The hull outside of SF6 gas-insulated transformer 1, interface board 3 are circle, internal diameter 30mm, outer diameter 50mm, using double-layer seal rings,
It is fixed on transformer shell with 8 screws, it is possible to prevente effectively from the leakage of SF6 gas.
Further, data acquisition card 4 is installed on the outside of transformer box wall interface board 3, by 16 cores for passing through interface board 3
Optical fiber is connected with hyperfrequency supersonic array partial discharge sensor module 2 to acquire sensor signal, in the present embodiment, the signal
Capture card 4 uses 16 road AD synchronous collecting cards, filtering and amplification (the filter range 200k- for signal acquisition and signal
20MHz, every road 40dB gain), (end of standing is transferred in intelligent electronic device 5 by optical fiber by filtering and amplified signal
Intelligent IED).
Further, the map generation module 51 in the intelligent electronic device 5 at substation station end comes from the transmission of data acquisition card 4
Signal in extract local discharge characteristic value and generate corresponding shelf depreciation map, include to put in shelf depreciation map
The information such as electric phase, amplitude, discharge time, accumulated discharge energy, frequency energy section；It will be generated using spectrum analysis module 52
Shelf depreciation map compared with existing typical discharges map, pass through phase, amplitude, discharge time, accumulated discharge energy
The type that amount and frequency energy section comprehensive judgement go out shelf depreciation belongs in needle plate electric discharge, creeping discharge and suspended discharge
It is any；
Further, the calculating locating module 53 in the intelligent electronic device 5 at substation station end then can be with miniature hyperfrequency office
Put sensor signal and ultrasonic sensor array signal case propagation delays calculate the space of discharge position and sensor module 2 away from
From；Pitch angle of the discharge position relative to sensor module 2 is calculated by the algorithm (FDOA algorithm) of arriving signal frequency difference；
Comprehensive positioning is carried out to discharge position eventually by the space length and pitch angle being calculated and generates located space spectrogram.
Further, the information display module 54 in the intelligent electronic device 5 at substation station end can be by collected electric discharge position
Phase information, amplitude and the discharge time set, there are also the shelf depreciation maps generated, located space spectrogram, and determine
The various informations such as electric discharge type be shown on the monitoring platform at station end.And the alarm module 56 in intelligent electronic device 5 can incite somebody to action
The electric discharge type result determined is broadcasted, so that the staff at end of standing knows that shelf depreciation occurs in transformer 1 in time
Hidden danger simultaneously takes appropriate measures, of course for making non-related personnel on duty also know corresponding situation, in the smart electronics
Be additionally provided with wireless communication module 55 in equipment 5, partial discharge warning message can be sent on their mobile phone, so as to they first when
Between get the information.
In addition, the intelligent electronic device 5 at substation station end should also have local storage function, and support that IEC61850 is logical
Believe agreement, main website clock synchronization can be received by message mode；Should also have protecting information safety isolation, information security certification simultaneously
And firewall device.
By above description it is found that the utility model has the beneficial effects that: the built-in SF6 gas of the utility model is exhausted
Edge On Line PD Monitoring of Transformer system, on the one hand, can discharged condition inside real-time monitoring SF6 gas-insulated transformer；On the one hand,
The partial discharge monitoring obtained result of system of more traditional external is more accurate, while avoiding failure Partial discharge signal by metal-back
Body shields brought missing inspection；On the one hand, defect can be found early early stage shelf depreciation occurs and handled, avoid partial discharge
Development cause SF6 gas-insulated transformer internal fault so as to cause occur power grid accident.
Above disclosures are merely preferred embodiments of the utility model, the utility model cannot be limited with this certainly
Interest field, therefore equivalent variations made according to the claim of the utility model still fall within the scope of the utility model.
Claims (8)
1. a kind of built-in SF6 gas-insulated transformer partial discharge monitors system, it is installed on the SF6 gas-insulated transformer,
It is characterised by comprising:
It is installed on the hyperfrequency supersonic array partial discharge sensor module of the SF6 gas-insulated transformer enclosure interior；
The data acquisition card being installed on the tank wall interface board of the SF6 gas-insulated transformer, the hyperfrequency supersonic array
Partial discharge sensor module is connected to the data acquisition card by optical fiber；
The collected signal of the hyperfrequency supersonic array partial discharge sensor module filters and amplifies by the data acquisition card
After be transmitted to station end intelligent electronic device in；
The hyperfrequency supersonic array partial discharge sensor module is centered on a miniature ultrahigh frequency partial discharge sensor, described micro-
An annular ultrasonic sensor array is installed on the annular border of type ultrahigh frequency partial discharge sensor；
The ultrasonic sensor array of the annular is 12 array element structures, by 12 ultrasonic sensors with model according to clock mode
Uniformly arrangement.
2. built-in SF6 gas-insulated transformer partial discharge according to claim 1 monitors system, which is characterized in that described
Built-in SF6 gas-insulated transformer partial discharge monitoring system is by acquisition and analyzes office inside the SF6 gas-insulated transformer
The ultrasound that portion's discharge position generates positions the position of the shelf depreciation and determines the shelf depreciation position with ultra-high frequency signal
Set the electric discharge type that place generates.
3. built-in SF6 gas-insulated transformer partial discharge according to claim 2 monitors system, which is characterized in that described
Electric discharge type includes needle plate electric discharge, creeping discharge and suspended discharge.
4. built-in SF6 gas-insulated transformer partial discharge according to claim 3 monitors system, which is characterized in that described
The detection frequency band of miniature ultrahigh frequency partial discharge sensor is 100-1500MHz.
5. built-in SF6 gas-insulated transformer partial discharge according to claim 4 monitors system, which is characterized in that described
Ultrasonic sensor uses import voltage-sensitive ceramic, and each array element spacing is half-wavelength 5mm.
6. built-in SF6 gas-insulated transformer partial discharge according to claim 1 monitors system, which is characterized in that described
Double-layer seal rings are set between tank wall interface board and the SF6 gas-insulated transformer shell, are carried out using screw thread fixed connection mode
Sealing.
7. built-in SF6 gas-insulated transformer partial discharge according to claim 1 monitors system, which is characterized in that described
Data acquisition card selects 16 tunnel synchronous collecting cards, passes through 16 core fibres and the miniature hyperfrequency supersonic array partial discharge sensor group
Part is connected.
8. built-in SF6 gas-insulated transformer partial discharge according to claim 7 monitors system, which is characterized in that described
The filter range of data acquisition card is 200k-20MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820359138.4U CN208506188U (en) | 2018-03-16 | 2018-03-16 | A kind of built-in SF6 gas-insulated transformer partial discharge monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820359138.4U CN208506188U (en) | 2018-03-16 | 2018-03-16 | A kind of built-in SF6 gas-insulated transformer partial discharge monitoring system |
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| CN208506188U true CN208506188U (en) | 2019-02-15 |
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| CN201820359138.4U Active CN208506188U (en) | 2018-03-16 | 2018-03-16 | A kind of built-in SF6 gas-insulated transformer partial discharge monitoring system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174600A (en) * | 2019-07-03 | 2019-08-27 | 云南电网有限责任公司电力科学研究院 | GIS detection device and application based on μ PMT combining ultrasonic sensor |
| CN110967601A (en) * | 2019-11-21 | 2020-04-07 | 南京航空航天大学 | Transformer bushing partial discharge multidimensional detection method |
-
2018
- 2018-03-16 CN CN201820359138.4U patent/CN208506188U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174600A (en) * | 2019-07-03 | 2019-08-27 | 云南电网有限责任公司电力科学研究院 | GIS detection device and application based on μ PMT combining ultrasonic sensor |
| CN110967601A (en) * | 2019-11-21 | 2020-04-07 | 南京航空航天大学 | Transformer bushing partial discharge multidimensional detection method |
| CN110967601B (en) * | 2019-11-21 | 2022-07-05 | 南京航空航天大学 | Multidimensional detection method for partial discharge of transformer bushing |
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