CN211426691U - Defect device for detecting partial discharge of transformer - Google Patents
Defect device for detecting partial discharge of transformer Download PDFInfo
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- CN211426691U CN211426691U CN201922447471.8U CN201922447471U CN211426691U CN 211426691 U CN211426691 U CN 211426691U CN 201922447471 U CN201922447471 U CN 201922447471U CN 211426691 U CN211426691 U CN 211426691U
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Abstract
The application discloses a defect device for detecting transformer partial discharge includes: the device comprises a transformer shell and a defect model arranged in the transformer shell; one end of the defect model is connected with the transformer shell, and the other end of the defect model is connected with a metal gear in the transformer shell; the movable end of the metal gear is connected with one end of the metal connecting wire, and the fixed end of the metal gear is connected with the insulating pull rod; the insulating pull rod is connected with an adjusting turntable positioned outside the transformer shell; the transformer shell is internally provided with a high-voltage winding, and a winding lead of the high-voltage winding is provided with a spherical end for contacting with the metal connecting wire. The application solves the technical problems that in the prior art, if the defect state of the transformer needs to be changed, the oil needs to be changed again, and the manual disassembly and assembly needs to be carried out, so that time and labor are wasted.
Description
Technical Field
The utility model belongs to the technical field of the electric power measurement, especially, relate to a defect device for detecting transformer partial discharge.
Background
The power transformer is important equipment of a power grid, and the detection and analysis of the insulation state of the power transformer are main links for ensuring the safety of the equipment. The partial discharge of the power transformer is an important parameter for representing the insulation state of the equipment, and the insulation state of the equipment can be accurately evaluated by detecting and analyzing the partial discharge of the power transformer. At present, two defect models for partial discharge detection of transformer oil paper insulation are mainly used, one defect model is that organic glass is used as a container, an oil paper insulating material is placed in the organic glass container to be made into a small model, a power transformer generates a partial discharge signal under the excitation of an external voltage, and the defect model can be used for researching the partial discharge characteristic of the oil paper insulating material and does not relate to the specific structure of the transformer. The model can be used for obtaining the partial discharge spectrogram and pulse waveform characteristics of different types of oil paper insulation defects, but the propagation characteristic of partial discharge signals is difficult to obtain due to the large difference between the defect model and the detection environment of an actual transformer. The other defect model is to arrange defects in the transformer, and the adopted method is to arrange metal tips on the inner wall or the winding of the transformer to simulate the electric field concentration of the transformer in the practical application scene. The defect model can be used for carrying out partial discharge detection on the transformer in an actual application scene to obtain the propagation characteristic of a signal, but the defect model is difficult to change once being implanted into the transformer, particularly defects implanted into a winding, and if the defect state of the transformer needs to be changed, oil needs to be changed again, and the defects need to be disassembled and assembled manually, so that time and labor are wasted.
SUMMERY OF THE UTILITY MODEL
In view of this, the present application provides a device for detecting a defect in a transformer partial discharge, which can rotate an insulating pull rod by rotating an adjusting turntable, and further rotate a metal gear, wherein the metal gear rotates to enable a metal connection line to be located at different positions, and when the metal gear rotates to be in contact with a winding lead, the transformer can generate a partial discharge under the action of an applied voltage, so as to study the partial discharge characteristic when the winding voltage acts on the defect. When the defect is not needed to be accessed, the metal connecting wire can be rotated to be in contact with the transformer shell, so that the defect model is grounded, and even if the high-voltage lead of the transformer has external voltage, discharge cannot be generated. The application solves the technical problems that in the prior art, if the defect state of the transformer needs to be changed, the oil needs to be changed again, and the manual disassembly and assembly needs to be carried out, so that time and labor are wasted.
The application provides a defect device for detecting transformer partial discharge, includes: the device comprises a transformer shell and a defect model arranged in the transformer shell;
one end of the defect model is connected with the transformer shell, and the other end of the defect model is connected with a metal gear in the transformer shell;
the movable end of the metal gear is connected with one end of the metal connecting wire, and the fixed end of the metal gear is connected with the insulating pull rod;
the insulating pull rod is connected with an adjusting turntable positioned outside the transformer shell;
the transformer shell is internally provided with a high-voltage winding, and a winding lead of the high-voltage winding is provided with a spherical end for contacting with the metal connecting wire.
Optionally, the shell of the defect model is made of organic glass.
Optionally, the internal defect of the defect model is a metal tip.
Optionally, the internal defect of the defect model is a floating potential.
Optionally, the transformer further comprises a bushing embedded in the transformer housing, the bushing being connected to one end of the high voltage winding.
Optionally, the other end of the high voltage winding is grounded.
Optionally, the bushing is provided with a high voltage lead.
To sum up, the present application provides a defect device for detecting transformer partial discharge, including: the device comprises a transformer shell and a defect model arranged in the transformer shell; one end of the defect model is connected with the transformer shell, and the other end of the defect model is connected with a metal gear in the transformer shell; the movable end of the metal gear is connected with one end of the metal connecting wire, and the fixed end of the metal gear is connected with the insulating pull rod; the insulating pull rod is connected with an adjusting turntable positioned outside the transformer shell; the transformer shell is internally provided with a high-voltage winding, and a winding lead of the high-voltage winding is provided with a spherical end for contacting with the metal connecting wire.
A defect device for detecting transformer partial discharge in this application can adjust the carousel through rotating and rotate insulating pull rod, and then rotates metal gear, and metal gear's rotation can make metal connecting wire be located different positions, when rotating to with the contact of winding lead wire, then the transformer can produce partial discharge under the effect of external voltage, can study the partial discharge characteristic when winding voltage acts on the defect. When the defect is not needed to be accessed, the metal connecting wire can be rotated to be in contact with the transformer shell, so that the defect model is grounded, and even if the high-voltage lead of the transformer has external voltage, discharge cannot be generated. The application solves the technical problems that in the prior art, if the defect state of the transformer needs to be changed, the oil needs to be changed again, and the manual disassembly and assembly needs to be carried out, so that time and labor are wasted.
Drawings
Fig. 1 is a schematic structural diagram of an apparatus for detecting a defect of a partial discharge of a transformer according to an embodiment of the present disclosure;
wherein the reference numbers are as follows:
a high-voltage lead 1; a sleeve 2; a transformer housing 3; a high-voltage winding 4; a winding lead 5; a metal connection line 6; a metal gear 7; an insulating pull rod 8; a defect model 9; the dial 10 is adjusted.
Detailed Description
The embodiment of the application provides a defect device for detecting transformer partial discharge can adjust the carousel through rotating and rotate insulating pull rod, and then rotates metal gear, and metal gear's rotation can make metal connecting wire be located different positions, when rotating to with winding lead wire contact, then the transformer can produce partial discharge under the effect of impressed voltage, can study the partial discharge characteristic when winding voltage acts on the defect. When the defect is not needed to be accessed, the metal connecting wire can be rotated to be in contact with the transformer shell, so that the defect model is grounded, and even if the high-voltage lead of the transformer has external voltage, discharge cannot be generated. The application solves the technical problems that in the prior art, if the defect state of the transformer needs to be changed, the oil needs to be changed again, and the manual disassembly and assembly needs to be carried out, so that time and labor are wasted.
The technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the embodiments in the present application.
In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless explicitly stated or limited otherwise; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a device for detecting a defect in a partial discharge of a transformer according to an embodiment of the present application;
the embodiment of the application provides a defect device for detecting transformer partial discharge, includes: the transformer shell 3 and a defect model 9 arranged in the transformer shell 3;
one end of the defect model 9 is connected with the transformer shell 3, and the other end of the defect model is connected with the metal gear 7 in the transformer shell 3;
the movable end of the metal gear 7 is connected with one end of the metal connecting wire 6, and the fixed end is connected with the insulating pull rod 8;
the insulating pull rod 8 is connected with an adjusting turntable 10 positioned outside the transformer shell 3;
the transformer shell 3 is internally provided with a high-voltage winding 4, and a winding lead 5 of the high-voltage winding 4 is provided with a spherical end for contacting with a metal connecting wire 6.
It should be noted that the apparatus for detecting a defect in a partial discharge of a transformer provided in the embodiment of the present application includes a transformer housing 3 and a defect model 9 built in the transformer housing 3. The defect model 9 is hung on the top of the transformer shell 3, one end of the defect model is connected with the transformer shell 3, the other end of the defect model is connected with the metal gear 7, the metal gear 7 is a circular metal gear 7, the movable end of the metal gear is connected with the metal connecting wire 6, the defect model can be rotated to be in contact with the spherical end of the winding lead 5 through the metal connecting wire 6, and then is communicated with the high-voltage winding 4 connected with the winding lead 5. The fixed end of the metal gear 7 is connected with an insulating pull rod 8, and the insulating pull rod 8 is further connected with an adjusting turntable 10 arranged outside the transformer shell 3. Outside the transformer housing 3, the insulating tie 8 can be rotated by rotating the adjusting dial 10, the rotation of the insulating tie 8 causing the metal gear 7 to rotate, thereby causing the metal connection wire 6 to be in different positions. When the metal connecting wire 6 rotates to be in contact with the winding lead 5, one end of the defect model 9 is connected with the transformer shell 3, the other end of the defect model is connected with the high-voltage winding 4, partial discharge can be generated under the action of the applied voltage, and the partial discharge characteristic of the defect model 9 under the action of the applied voltage of the high-voltage winding 4 can be researched by researching the partial discharge. When the access of the defect model 9 is not needed, the metal connecting wire 6 can be adjusted to be in contact with the transformer shell 3, the two ends of the defect model 9 are grounded and are in short circuit, and the defect model 9 cannot be caused to discharge even if the high-voltage lead 1 of the transformer has external voltage. In the embodiment of the present application, the positions of the defect models 9 are not limited, the number of the defect models 9 is not limited, one or more defect models 9 may be placed, and according to the connection relationship, the partial discharge research of the high-voltage winding 4 under the voltage excitation at different positions may be realized.
Further, the shell of the defect model 9 is made of organic glass.
It should be noted that the outer shell of the defect model 9 in the embodiment of the present application may be made of organic glass.
Further, the internal defect of the defect model 9 is a metal tip.
It should be noted that the defect model 9 in the embodiment of the present application may be a metal tip.
Further, the internal defect of the defect model 9 is a floating potential.
Note that the defect model 9 in the embodiment of the present application may be a floating potential.
Further, a sleeve 2 embedded in the transformer housing 3 is included, and the sleeve 2 is connected with one end of the high-voltage winding 4.
It should be noted that, one end of the high-voltage winding 4 of the embodiment of the present application is connected to the bushing 2, and the bushing 2 is embedded in the top of the transformer housing 3.
Further, the other end of the high voltage winding 4 is grounded.
The other end of the high-voltage winding 4 is grounded and connected to the transformer case 3.
Further, the bushing 2 is provided with a high voltage lead 1.
A high-voltage lead 1 is provided on the top of the bushing 2.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (7)
1. A defect apparatus for detecting partial discharge of a transformer, comprising: the device comprises a transformer shell and a defect model arranged in the transformer shell;
one end of the defect model is connected with the transformer shell, and the other end of the defect model is connected with a metal gear in the transformer shell;
the movable end of the metal gear is connected with one end of the metal connecting wire, and the fixed end of the metal gear is connected with the insulating pull rod;
the insulating pull rod is connected with an adjusting turntable positioned outside the transformer shell;
the transformer shell is internally provided with a high-voltage winding, and a winding lead of the high-voltage winding is provided with a spherical end for contacting with the metal connecting wire.
2. The apparatus according to claim 1, wherein the casing of the defect model is made of organic glass.
3. The apparatus for detecting the defect of the partial discharge of the transformer as claimed in claim 1, wherein the internal defect of the defect model is a metal tip.
4. The apparatus for detecting the defect of the partial discharge of the transformer as claimed in claim 1, wherein the internal defect of the defect model is a floating potential.
5. The apparatus for detecting the defect of partial discharge of transformer according to claim 1, further comprising a bushing embedded in said transformer housing, said bushing being connected to one end of said high voltage winding.
6. The apparatus for detecting the defect of partial discharge of transformer according to claim 5, wherein the other end of said high voltage winding is grounded.
7. The apparatus for detecting the defect of partial discharge of transformer according to claim 5, wherein said bushing is provided with a high voltage lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922447471.8U CN211426691U (en) | 2019-12-27 | 2019-12-27 | Defect device for detecting partial discharge of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922447471.8U CN211426691U (en) | 2019-12-27 | 2019-12-27 | Defect device for detecting partial discharge of transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211426691U true CN211426691U (en) | 2020-09-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922447471.8U Active CN211426691U (en) | 2019-12-27 | 2019-12-27 | Defect device for detecting partial discharge of transformer |
Country Status (1)
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|---|---|
| CN (1) | CN211426691U (en) |
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2019
- 2019-12-27 CN CN201922447471.8U patent/CN211426691U/en active Active
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