CN205981087U - A capacitive character coupling sensor for transformer winding warp on -line measuring - Google Patents
A capacitive character coupling sensor for transformer winding warp on -line measuring Download PDFInfo
- Publication number
- CN205981087U CN205981087U CN201620803067.3U CN201620803067U CN205981087U CN 205981087 U CN205981087 U CN 205981087U CN 201620803067 U CN201620803067 U CN 201620803067U CN 205981087 U CN205981087 U CN 205981087U
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- holder
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- transformer winding
- metal sheet
- sheet band
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Abstract
The utility model discloses a capacitive character coupling sensor for transformer winding warp on -line measuring includes mainly that the metal thin takes 6, cable joint 7 and fixed folder 8, cable joint is connected through fixed folder and metal are thin electrified. Fixed folder is including setting up in the thin first stiff end of taking of metal, setting up and take the second stiff end of the other end and connect first fixed part and second fixed part connecting piece in the metal is thin. The utility model discloses take bolted connection, firm mode, improved the installation convenience greatly, the utility model discloses take the insulating mode of pyrocondensation pipe parcel, guaranteed its electrical safety nature.
Description
Technical field
This utility model is related to power system electrical equipment online measuring technique field and in particular to a kind of Transformer Winding
The sensor design of On-line Fault Detection.
Background technology
Power transformer plays a part power converter in power system, is one of key equipment in power system, protects
Demonstrate,prove its stable operation significant to improving power system power supply reliability.Transformator running, in transportation, its around
Group is all it may happen that micro-strain.And the deformation of winding has accumulative effect, can continue to run with the case that deformation is not serious.But
It is that deformation of transformer winding not only can lead to the decline of transformator anti-short circuit capability, simultaneously the insulation system of inside transformer
To be destroyed.When Transformer Winding is subject under very big electric power impact, transformator, it may happen that catastrophe failure, leads to
Equipment has a power failure out of service.At present, mostly the Winding Distortion Inspection Technology of Transformer of application is under off-line state, it to be examined
Survey.Detection under off-line state can not find deformation present in Transformer Winding in time, therefore, research Transformer Winding event
Barrier online measuring technique is a need for.Pulse frequency response analyses method has the advantages that detection sensitivity height, detection speed are fast,
More applications are obtained.And realize the application of pulse frequency response analyses method, it is desirable to have do not affect transformator and its correlation sets
The pulse signal injection sensor of standby safe operation and response signal collection sensor.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of electric capacity for deformation of transformer winding on-line checking
Property coupling sensor.
For reaching above-mentioned purpose, this utility model provides following technical scheme, a kind of online for deformation of transformer winding
The capacitive couplings sensor of detection, main inclusion metal sheet band 6, cable connector 7 and fixed clip 8, described cable connector leads to
Cross fixed clip to electrically connect with metal sheet band.
Further, described fixed clip includes being arranged at the first fixing end of metal sheet band, to be arranged at metal sheet band another
Second fixing end at end and connection the first fixing end and the second fixing end connection.
Further, described connector is stud and the nut with stud cooperation.
Further, described cable connector includes two ends and has deep hole, middle part has the cylinder of screw hole, described deep hole edge
Cylinder length direction is arranged, and one of inner walls of deep holes is threaded, this screw thread is matched with the screw thread on stud；Another
Individual deep hole is used for placing cable, and screw passes through the tight cable of helical pore pressure.
Further, described first fixing end includes the first holder, and described first holder is provided with first through hole, gold
The one end belonging to strip outwards turns down formation the first holder placement space, and it is solid that described first holder is rotatably arranged at first
Determine in device placement space.
Further, described second fixing end includes the second holder, and described second holder is provided with the second through hole, gold
The other end belonging to strip outwards turns down formation the second holder placement space, and described second holder is rotatably arranged at second
In holder placement space.
Further, this sensor also includes fixed clip guide part, and one end of described guide part is connected with metal sheet band, leads
It is free end to the other end in portion, the cross section of described guide part is spill.
Further, this sensor also includes heat-shrink tube, and described metal sheet band is arranged in heat-shrink tube.
The beneficial effects of the utility model are：
1st, this utility model takes bolt connection, firm mode, substantially increases installation convenience；
2nd, this utility model takes heat-shrink tube parcel insulation mode it is ensured that its electrical security.
Brief description
In order that the purpose of this utility model, technical scheme and beneficial effect are clearer, this utility model provides as follows
Accompanying drawing illustrates：
Fig. 1 is capacitive couplings Fundamentals of Sensors figure；
Fig. 2 is the cable connector of capacitive couplings sensor；
Fig. 3 is capacitive couplings sensor structure figure；
Fig. 4 is capacitive couplings sensor injecting principle figure.
Specific embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail.
As shown in figure 1, the sleeve pipe of transformator is divided into capacitance graded bushing and pure porcelain casing tube.Condenser-type terminal is by guide rod 2, capacitance core
Sub, outer insulator 3 forms, and is filled with insulating oil.Inside pipe casing capacitor core 5 together constitutes complex capacitance 1 structure.Pure
Porcelain bushing shell is made up of the insulating oil of 2, one layer of overcoat thickness insulator of metal guide rod and intermediate gaps filling.The gold being wound around outside pure porcelain casing tube
Belong to strip and sleeve pipe guide rod and the pottery between them, insulating oil constitute capacitance structure.Therefore, pulse signal can pass through institute
State the pumping signal as winding head end for the guide rod that sensor is coupled to inside pipe casing.
As Figure 2-3, a kind of capacitive couplings sensor for deformation of transformer winding on-line checking, main inclusion
Metal sheet band 6, cable connector 7 and fixed clip 8, described cable connector is electrically connected with metal sheet band by fixed clip.Cable
Joint is used for connecting outer, coaxial cable, for transmission pulse signal.Fixed clip is used for fixing metal sheet band.
Metal sheet band is width 2cm, and diameter can be according to the annulus of transformer parameter change.Material therefor is rustless steel, protects
Demonstrate,prove its mechanical strength.
Described fixed clip includes being arranged at the first fixing end of metal sheet band, is arranged at the second of the metal sheet band other end
Fixing end and connection the first fixing end and the second fixing end connection.Described connector is stud 87 and the spiral shell with stud cooperation
Female.The a diameter of M6 of described stud, it is ensured that metal sheet band installation strength, improves its safety.
Described first fixing end includes the first holder 81, and described first holder is provided with first through hole 82, metal
One end of strip outwards turns down formation the first holder placement space 83, and it is solid that described first holder is rotatably arranged at first
Determine in device placement space.
Described second fixing end includes the second holder 84, and described second holder is provided with the second through hole 85, metal
The other end of strip outwards turns down formation the second holder placement space 86, and described second holder is rotatably arranged at second
In holder placement space.
The material of cable connector is rustless steel, and it is a height is 50mm, the cylinder of diameter 6-8mm.Described cable
Joint includes two ends and has deep hole 71, middle part has the cylinder of screw hole, and described deep hole is arranged along cylinder length direction, its
In be threaded on deep hole (depth in this hole is 8mm) inwall, this screw thread is matched with the screw thread on stud, by this spiral shell
Stricture of vagina is connected with screw rod it is ensured that cable connector and fixed clip stable connection；Another deep hole is used for placing cable, and screw 73 passes through
Screw hole 72 compression external cable, it is ensured that external cable is contacted well with metal sheet band, realizes signal injection.
Metal sheet band is placed in inside heat-shrink tube.Described heat-shrink tube main material is PVC, is market marketing material.Pyrocondensation
Pipe coated metal strip, plays the effect of the anti-flashover of dustproof and rainproof.
Sensor described in the present embodiment also includes fixed clip guide part 88, one end of described guide part and metal sheet band
Connect, the other end of guide part is free end, the cross section of described guide part is spill.
In this utility model, the first fixing end and the second fixing end are connected by screw rod, and are locked by nut, the overall length of nut
Degree is more than the width sum of the first holder and the second holder.After first fixing end is locked with the second fixing end, cable is connect
Head is connected with screw rod, cable is connected with cable connector and uses screw in compression cable.
The sensor will be arranged on bushing shell for transformer finally under a piece of full skirt, near flange, and ensure tight.Arteries and veins
Rush signal UeCoupled electric capacity CCIt is applied on bushing shell for transformer interior metal guide rod, signal is paramount upwards along guide rod respectively afterwards
Press bus and along metal guide rod to down in Transformer Winding；High voltage bus impedance is Zgrid, Transformer Winding equiva lent impedance is
Ztw, guide rod is C through forming an electric capacity between surrounding medium and groundbt；Flow through coupled capacitor, high voltage bus, Transformer Winding
It is respectively I with the electric current of metal guide rod direct-to-ground capacitancec、Igrid、Itw、Ibt, then it is coupled to the voltage U of Transformer Winding head endCFor
Finally illustrate, preferred embodiment above only in order to the technical solution of the utility model to be described and unrestricted, to the greatest extent
Gutron is crossed above preferred embodiment and this utility model is described in detail, but those skilled in the art should manage
Solution, can make various changes, in the form and details without departing from this utility model claims institute to it
The scope limiting.
Claims (6)
1. a kind of capacitive couplings sensor for deformation of transformer winding on-line checking it is characterised in that：Main inclusion gold
Belong to strip（6）, cable connector（7）And fixed clip（8）, described cable connector electrically connected with metal sheet band by fixed clip,
Described fixed clip include being arranged at metal sheet band the first fixing end, be arranged at the second fixing end of the metal sheet band other end with
And connecting the first fixing end and the second fixing end connection, described cable connector includes that two ends have deep hole, middle part has screw
The cylinder in hole, described deep hole is arranged along cylinder length direction, and one of inner walls of deep holes is threaded, this screw thread and spiral shell
Screw thread on post matches；Another deep hole is used for placing cable, and screw passes through the tight cable of helical pore pressure.
2. the capacitive couplings sensor for deformation of transformer winding on-line checking according to claim 1, its feature
It is：Described connector is stud and the nut with stud cooperation.
3. the capacitive couplings sensor for deformation of transformer winding on-line checking according to claim 2, its feature
It is：Described first fixing end includes the first holder, and described first holder is provided with first through hole, and the one of metal sheet band
Outwards turnover forms the first holder placement space at end, and it is empty that described first holder is rotatably arranged at the first holder placement
Interior.
4. the capacitive couplings sensor for deformation of transformer winding on-line checking according to claim 2, its feature
It is：Described second fixing end includes the second holder, and described second holder is provided with the second through hole, metal sheet band another
One end outwards turns down formation the second holder placement space, and described second holder is rotatably arranged at the second holder and places
In space.
5. the capacitive couplings sensor for deformation of transformer winding on-line checking according to claim 1,3 or 4, its
It is characterised by：This sensor also includes fixed clip guide part, and one end of described guide part is connected with metal sheet band, guide part
The other end is free end, and the cross section of described guide part is spill.
6. the capacitive couplings sensor for deformation of transformer winding on-line checking according to claim 1, its feature
It is：This sensor also includes heat-shrink tube, and described metal sheet band is arranged in heat-shrink tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620803067.3U CN205981087U (en) | 2016-07-27 | 2016-07-27 | A capacitive character coupling sensor for transformer winding warp on -line measuring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620803067.3U CN205981087U (en) | 2016-07-27 | 2016-07-27 | A capacitive character coupling sensor for transformer winding warp on -line measuring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205981087U true CN205981087U (en) | 2017-02-22 |
Family
ID=58027137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620803067.3U Expired - Fee Related CN205981087U (en) | 2016-07-27 | 2016-07-27 | A capacitive character coupling sensor for transformer winding warp on -line measuring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205981087U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110243275A (en) * | 2019-05-23 | 2019-09-17 | 国网山东省电力公司临沂供电公司 | A kind of device for distribution transformer winding online injection swept-frequency signal |
| CN112462124A (en) * | 2020-12-07 | 2021-03-09 | 广西电网有限责任公司电力科学研究院 | Coupling mutual inductor |
| CN113985166A (en) * | 2021-10-19 | 2022-01-28 | 国网重庆市电力公司电力科学研究院 | Sleeve and transformer winding state monitoring device based on pulse frequency response method |
-
2016
- 2016-07-27 CN CN201620803067.3U patent/CN205981087U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110243275A (en) * | 2019-05-23 | 2019-09-17 | 国网山东省电力公司临沂供电公司 | A kind of device for distribution transformer winding online injection swept-frequency signal |
| CN112462124A (en) * | 2020-12-07 | 2021-03-09 | 广西电网有限责任公司电力科学研究院 | Coupling mutual inductor |
| CN113985166A (en) * | 2021-10-19 | 2022-01-28 | 国网重庆市电力公司电力科学研究院 | Sleeve and transformer winding state monitoring device based on pulse frequency response method |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170222 Termination date: 20170727 |