CN116559613A - Transformer internal defect simulation device - Google Patents
Transformer internal defect simulation device Download PDFInfo
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- CN116559613A CN116559613A CN202210679642.3A CN202210679642A CN116559613A CN 116559613 A CN116559613 A CN 116559613A CN 202210679642 A CN202210679642 A CN 202210679642A CN 116559613 A CN116559613 A CN 116559613A
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- transformer
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- independent oil
- partial discharge
- winding
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- 230000007547 defect Effects 0.000 title claims abstract description 110
- 238000004088 simulation Methods 0.000 title claims abstract description 27
- 238000004804 winding Methods 0.000 claims abstract description 49
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 19
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 5
- 238000009413 insulation Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000002513 implantation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011111 cardboard Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/20—Preparation of articles or specimens to facilitate testing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention provides a device for simulating internal defects of a transformer, which comprises: a transformer body and an independent oil chamber; the transformer body comprises a box body, an iron core and a winding sleeved on the iron core, wherein the iron core and the winding are both arranged in the box body, and at least one part of the independent oil chamber is arranged in the box body; and a partial discharge defect model is arranged in the independent oil chamber and is electrically connected with the winding and used for realizing transformer defect simulation. According to the invention, the transformer oil in the independent oil chamber is separated from the transformer body by the arrangement of the independent oil chamber, so that the insulation performance of the transformer body is ensured not to be deteriorated due to the influence of partial discharge, and meanwhile, the operation of replacing the partial discharge defect is simplified; the multiple independent oil chambers can simulate different phases, different positions and different partial discharge types of the transformer.
Description
Technical Field
The invention relates to the technical field of transformer defect simulation, in particular to a transformer internal defect simulation device.
Background
Power transformers are critical components in power systems, and their health directly affects the stable operation of the power system. On one hand, the improper manufacturing process of the transformer can cause uneven surface of the conductor, and a burr-shaped structure with larger curvature is generated; on the other hand, winding deformation and core vibration caused by transient overvoltage in the operation process of the transformer can cause insulation structure change, so that the transformer is developed into an insulation defect. When the local field is stronger than the breakdown field of the insulating medium, a discharge occurs in this local region, but the discharge does not progress throughout the two poles, and this discharge is called partial discharge. As the partial discharge degree increases, the overall insulation strength of the transformer rapidly decreases, and serious faults may be eventually caused. Partial discharge is an important cause of deterioration of insulation of a power transformer, and is also a main sign and expression form of deterioration.
For the research of the detection of partial discharge inside the transformer, the partial discharge defects of different positions and different discharge types need to be simulated inside the transformer. However, in the prior art, the position of the simulated discharge inside the transformer is relatively fixed, and the defect type is relatively single and is not easy to replace.
Disclosure of Invention
In view of the above, the invention provides a device for simulating internal defects of a transformer, which solves the problems of fixed position, single defect type and difficult replacement of the existing partial discharge simulation in the transformer.
In order to solve the technical problems, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a device for simulating internal defects of a transformer, including:
a transformer body and an independent oil chamber;
the transformer body comprises a box body, an iron core and a winding sleeved on the iron core, wherein the iron core and the winding are both arranged in the box body, and at least one part of the independent oil chamber is arranged in the box body;
and a partial discharge defect model is arranged in the independent oil chamber and is electrically connected with the winding and used for realizing transformer defect simulation.
Further, the independent oil chambers are plural and are arranged from top to bottom along the axial position of the winding.
Further, the device for simulating the internal defects of the transformer further comprises: and one side of the independent oil chamber, which is close to the box body, is connected with one end of the connecting device, and the other end of the connecting device is clamped in the side wall of the box body.
Further, at least one part of the other end of the connecting device is arranged outside the box body, an oil valve is arranged on the connecting device and is arranged outside the box body, and the oil valve is communicated with the independent oil chamber; and/or
The other end of the connecting device is connected with a cover plate.
Further, the windings comprise a low-voltage winding and a high-voltage winding, and the high-voltage winding is externally connected with a lead wire; a guide plate is further arranged in the independent oil chamber, and the guide plate is arranged on one side, close to the winding, of the independent oil chamber; the guide plate is communicated with the lead wire and is used for introducing high-voltage electric potential into the independent oil chamber; the guide plate is electrically connected with the partial discharge defect model.
Further, the independent oil chamber further includes: and one end of the guide rod is detachably connected with the guide plate, and the other end of the guide rod is detachably connected with one end of the partial discharge defect model.
Further, the independent oil chamber further includes: and at least one part of the push rod extends into the independent oil chamber, one end of the push rod extending into the independent oil chamber is detachably connected with the other end of the partial discharge defect model, the other end of the push rod extends out of the side wall of the box body of the transformer, and the guide rod is controlled to be separated from or contacted with the guide plate through the push rod.
Further, the partial discharge defect model comprises a high-voltage electrode and a low-voltage electrode, wherein the high-voltage electrode is electrically connected with the guide rod, and the low-voltage electrode is connected with the push rod.
Further, the length of the guide rod is adjustable.
Further, the partial discharge defect model includes a tip defect model, a surface defect model, a floating defect model, or an air gap defect model.
The technical scheme of the invention has the following beneficial effects:
the invention provides a device for simulating internal defects of a transformer, which comprises: a transformer body and an independent oil chamber; the transformer body comprises a box body, an iron core and a winding sleeved on the iron core, wherein the iron core and the winding are both arranged in the box body, and at least one part of the independent oil chamber is arranged in the box body; and a partial discharge defect model is arranged in the independent oil chamber and is electrically connected with the winding and used for realizing transformer defect simulation.
The transformer internal defect simulation device provided by the invention has at least the following advantages:
(1) In the invention, the solid power transformer is adopted as the body, so that the situation when partial discharge occurs in the transformer is more truly simulated;
(2) In the invention, the defect implantation is carried out by adopting a mode of independently setting the independent oil chamber, so that the partial discharge defect model and the transformer body are separated, and the insulation performance of the transformer body is ensured not to be deteriorated due to the influence of partial discharge;
(3) The arrangement of a plurality of independent oil chambers can realize the simulation of different phases, different positions and different partial discharge types in the transformer;
(4) The partial discharge defect model in the independent oil chamber can be controlled to start or stop by pushing in and pulling out the push rod, and the operation is simple and easy to control;
(5) Meanwhile, the independent oil chamber is arranged, so that the operation of replacing the partial discharge defect model is simplified.
Drawings
FIG. 1 is a schematic diagram of an overall structure of a device for simulating internal defects of a transformer;
FIG. 2 is a schematic side view of a device for simulating internal defects of a transformer;
FIG. 3 is a schematic view of the independent oil chamber structure;
FIG. 4 is a schematic diagram of a tip defect model;
FIG. 5 is a schematic diagram of a planar defect model;
FIG. 6 is a schematic diagram of a floating defect model;
FIG. 7 is a schematic diagram of an air gap defect model.
Reference numerals:
the device comprises a box body 1, an independent oil chamber 2, an iron core 3, a winding 4, a partial discharge defect model 5, a connecting device 6, an oil valve 7, a cover plate 8, a guide plate 9, a guide rod 10 and a push rod 11;
a tip high voltage electrode 501, a low voltage electrode 502, and a oilpaper insulating medium 503;
a high-voltage along-surface electrode 511 and an oil-immersed along-surface cardboard 512;
a high voltage electrode 521 and a floating electrode 522;
the air gap discharges the special fitting 531.
Detailed Description
For a further understanding of the present invention, preferred embodiments of the invention are described below in conjunction with the examples, but it is to be understood that these descriptions are merely intended to illustrate further the features and advantages of the invention and are not limiting of the invention.
The internal defect simulation device for the transformer provided by the invention is further explained below with reference to fig. 1 to 7.
In a first aspect, the present invention provides a device for simulating internal defects of a transformer, including:
a transformer body and an independent oil chamber 2; the transformer body comprises a box body 1, an iron core 3 and a winding 4 sleeved on the iron core 3, wherein the iron core 3 and the winding 4 are both arranged in the box body 1, and at least one part of the independent oil chamber 2 is arranged in the box body 1; the inside of the independent oil chamber 2 is provided with a partial discharge defect model 5, and the partial discharge defect model 5 is electrically connected with the winding 4 and is used for realizing transformer defect simulation.
According to some embodiments of the invention, the independent oil chambers 2 are plural and are disposed from top to bottom along the axial position of the windings 4.
The invention provides a transformer internal defect simulation device which mainly comprises a transformer body and an independent oil chamber 2, wherein the transformer body is a common transformer and comprises a box body 1, an iron core 3 arranged in the box body 1 and a winding 4 sleeved on the iron core 3. Meanwhile, at least a part of the independent oil chamber 2 is arranged in the box body 1, a partial discharge defect model 5 is arranged in the independent oil chamber 2, and the partial discharge defect model 5 is electrically connected with the winding 4 and is used for realizing transformer defect simulation. In the invention, the solid power transformer is adopted as the body, so that the situation when partial discharge occurs in the transformer is more truly simulated. The defect implantation is carried out by adopting the mode of independently arranging the independent oil chamber 2, the partial discharge defect model 5 and the transformer body are separated, and the insulation performance of the transformer body is ensured not to be deteriorated due to the influence of partial discharge.
In addition, the number of the independent oil chambers 2 can be multiple, and the independent oil chambers 2 are arranged from top to bottom along the axial direction of the winding 4. Specifically, referring to fig. 1 and 2, fig. 1 is a schematic diagram of a common three-phase transformer, three independent oil chambers 2 are disposed from top to bottom on a side surface of a transformer box 1 corresponding to each phase winding 4, and fig. 2 is a schematic diagram of a side surface structure of one phase winding 4.
According to some embodiments of the invention, the transformer internal defect simulation apparatus further comprises: and one side, close to the box body 1, of the independent oil chamber 2 is connected with one end of the connecting device 6, and the other end of the connecting device 6 is clamped in the side wall of the box body 1.
According to some embodiments of the invention, at least a part of the other end of the connecting device 6 is arranged outside the tank 1, an oil valve 7 is arranged on the connecting device 6, the oil valve 7 is arranged outside the tank 1, and the oil valve 7 is communicated with the independent oil chamber 2; and/or
The other end of the connecting device 6 is connected with a cover plate 8.
Referring to fig. 2, in the invention, the independent oil chamber 2 is connected with the box body 1 of the transformer through the connecting device 6, wherein one side, close to the box body 1, of the independent oil chamber 2 is connected with one end of the connecting device 6, and the other end of the connecting device 6 is clamped in the side wall of the box body 1. Typically, the connection means 6 may be a flange. Furthermore, the connecting device 6 is provided with an oil valve 7, at least a part of the other end of the connecting device 6 is arranged outside the tank 1, the oil valve 7 is arranged outside the tank 1, and the oil valve 7 is communicated with the independent oil chamber 2. The internal defect simulation device of the transformer can replace the oil sample in the independent oil chamber 2 after replacing the partial discharge defect model 5 or circularly working for a plurality of times by using the oil valve 7.
According to some embodiments of the invention, the winding 4 comprises a low voltage winding and a high voltage winding, the high voltage winding being externally connected to a lead; a guide plate 9 is further arranged in the independent oil chamber 2, and the guide plate 9 is arranged on one side of the independent oil chamber 2, which is close to the winding 4; the guide plate 9 is communicated with the lead wire and is used for introducing high-voltage electric potential into the independent oil chamber 2; the guide plate 9 is electrically connected with the partial discharge defect model 5.
Referring to fig. 2, the main structural components of the transformer body include a winding 4 and an iron core 3, the winding 4 includes a low-voltage winding and a high-voltage winding, in order to simulate the operation condition of a real transformer, the low-voltage winding of the transformer is pressurized in the use process, the high-voltage winding obtains higher power frequency voltage through electromagnetic induction for exciting defects to generate partial discharge, and the high-voltage winding voltage is introduced into the independent oil chamber 2 through a lead wire externally connected with the high-voltage winding. Meanwhile, referring to fig. 3, a guide plate 9 is further arranged in the independent oil chamber 2, the guide plate 9 is communicated with the lead wires of the high-voltage winding, and the guide plate 9 is electrically connected with the partial discharge defect model 5 at the same time and is used for providing high-voltage potential for the partial discharge defect model 5. In practical use, the guide plate 9 may be a high-voltage metal plate.
According to some embodiments of the invention, the independent oil chamber 2 further comprises: and one end of the guide rod 10 is detachably connected with the guide plate 9, and the other end of the guide rod 10 is detachably connected with one end of the partial discharge defect model 5.
According to some embodiments of the invention, the independent oil chamber 2 further comprises: the push rod 11, at least a portion of the push rod 11 stretches into the independent oil chamber 2, one end stretching into the independent oil chamber 2 is detachably connected with the other end of the partial discharge defect model 5, the other end of the push rod 11 stretches out of the side wall of the box body 1 of the transformer, and the push rod 11 controls the guide rod 10 to be separated from or contacted with the guide plate 9.
According to some embodiments of the present invention, the partial discharge defect model 5 includes a high voltage electrode and a low voltage electrode, the high voltage electrode is electrically connected to the guide rod 10, and the low voltage electrode is connected to the push rod 11.
According to some embodiments of the invention, the length of the guide bar 10 is adjustable.
According to some embodiments of the present invention, a dynamic sealing process is performed between the pushrod 11 and the connecting device 6, and the pushrod 11 moves while guaranteeing the tightness of the independent oil chamber 2.
Further, the independent oil chamber 2 also comprises a guide rod 10 and a push rod 11, see fig. 3. One end of the guide rod 10 is detachably connected with the guide plate 9, and the other end of the guide rod 10 is detachably connected with one end of the partial discharge defect model 5. At least a part of the push rod 11 extends into the independent oil chamber 2, one end extending into the independent oil chamber 2 is detachably connected with the other end of the partial discharge defect model 5, the other end of the push rod 11 extends out of the side wall of the box body 1 of the transformer, and the push rod 11 controls the guide rod 10 to be separated from or contacted with the guide plate 9. In the actual use process, the push rod 11 is pushed into the independent oil chamber 2, the push rod 11 drives the guide rod 10 and the guide plate 9 to elastically contact, and at the moment, the partial discharge defect is started. And then the push rod 11 is pulled out of the independent oil chamber 2, the guide rod 10 and the guide plate 9 are separated, and the partial discharge defect is stopped. According to the invention, by pushing in and pulling out the push rod 11, whether the partial discharge defect model 5 in the independent oil chamber 2 discharges or not can be controlled, and the operation is simple and convenient and the operation is easy to get on hand. Meanwhile, the length of the guide rod 10 can be adjusted, and the position of the partial discharge defect model 5 in the independent oil chamber 2 can be controlled by changing the length of the guide rod 10, so that the simulation of partial discharge conditions at different positions in the transformer is realized.
According to some embodiments of the invention, the partial discharge defect model 5 comprises a tip defect model, a faceted defect model, a floating defect model, or an air gap defect model. Different partial discharge defect models 5 can be placed in the independent oil chamber 2, so that partial discharge under different conditions is simulated. Specifically, the partial discharge defect model 5 includes a tip defect model, a surface defect model, a floating defect model, an air gap defect model, and the like. The method for replacing the partial discharge defect model 5 comprises the following steps: and opening the oil valve 7 to extract transformer oil in the independent oil chamber 2, and opening the cover plate 8 connected to the connecting device 6 after extracting, so as to take out and replace the partial discharge defect model 5.
According to some embodiments of the present invention, the tip defect model is composed of a tip high voltage electrode 501, a tip high voltage electrode 502 and an oilpaper insulation medium 503, and the structure of the tip defect model is shown in fig. 4.
According to some embodiments of the present invention, the edge defect model is composed of an edge high-voltage electrode 511, an edge high-voltage electrode 502 and an edge oil-immersed paper board 512, and the structure of the edge defect model is shown in fig. 5.
According to some embodiments of the present invention, the floating defect model is composed of a high voltage electrode 521, a low voltage electrode 502 and a floating electrode 522, and the structure of the floating defect model is shown in fig. 6.
According to some embodiments of the present invention, the air gap defect model is composed of a high-voltage electrode 521, a high-voltage electrode 502 and an air gap discharge special-purpose fitting 531, and the structure of the air gap defect model is shown in fig. 7.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate a relative positional relationship, which changes accordingly when the absolute position of the object to be described changes.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (10)
1. An internal defect simulation device for a transformer, comprising:
a transformer body and an independent oil chamber;
the transformer body comprises a box body, an iron core and a winding sleeved on the iron core, wherein the iron core and the winding are both arranged in the box body, and at least one part of the independent oil chamber is arranged in the box body;
and a partial discharge defect model is arranged in the independent oil chamber and is electrically connected with the winding and used for realizing transformer defect simulation.
2. The transformer internal defect simulation apparatus according to claim 1, wherein the independent oil chambers are plural and are provided from top to bottom along the axial position of the winding.
3. The transformer internal defect simulation apparatus according to claim 1 or 2, further comprising:
and one side of the independent oil chamber, which is close to the box body, is connected with one end of the connecting device, and the other end of the connecting device is clamped in the side wall of the box body.
4. A transformer internal defect simulation device according to claim 3, wherein at least a part of the other end of the connecting device is arranged outside the tank body, an oil valve is arranged on the connecting device, the oil valve is arranged outside the tank body, and the oil valve is communicated with the independent oil chamber; and/or
The other end of the connecting device is connected with a cover plate.
5. The transformer internal defect simulation device according to claim 1 or 2, wherein the windings comprise a low voltage winding and a high voltage winding, the high voltage winding being externally connected to a lead;
a guide plate is further arranged in the independent oil chamber, and the guide plate is arranged on one side, close to the winding, of the independent oil chamber;
the guide plate is communicated with the lead wire and is used for introducing high-voltage electric potential into the independent oil chamber; the guide plate is electrically connected with the partial discharge defect model.
6. The transformer internal defect simulation apparatus according to claim 5, wherein the independent oil chamber further comprises:
and one end of the guide rod is detachably connected with the guide plate, and the other end of the guide rod is detachably connected with one end of the partial discharge defect model.
7. The transformer internal defect simulation apparatus according to claim 6, wherein the independent oil chamber further comprises:
and at least one part of the push rod extends into the independent oil chamber, one end of the push rod extending into the independent oil chamber is detachably connected with the other end of the partial discharge defect model, the other end of the push rod extends out of the side wall of the box body of the transformer, and the guide rod is controlled to be separated from or contacted with the guide plate through the push rod.
8. The device for simulating internal defects of a transformer according to claim 7, wherein the partial discharge defect model comprises a high-voltage electrode and a low-voltage electrode, the high-voltage electrode is electrically connected with the guide rod, and the low-voltage electrode is connected with the push rod.
9. The transformer internal defect simulation apparatus according to claim 6, wherein the length of the guide rod is adjustable.
10. The transformer internal defect simulation apparatus according to claim 1, wherein the partial discharge defect model comprises a tip defect model, a surface defect model, a floating defect model, or an air gap defect model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210679642.3A CN116559613A (en) | 2022-06-15 | 2022-06-15 | Transformer internal defect simulation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210679642.3A CN116559613A (en) | 2022-06-15 | 2022-06-15 | Transformer internal defect simulation device |
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| Publication Number | Publication Date |
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| CN116559613A true CN116559613A (en) | 2023-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210679642.3A Pending CN116559613A (en) | 2022-06-15 | 2022-06-15 | Transformer internal defect simulation device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117075002A (en) * | 2023-08-23 | 2023-11-17 | 西安工程大学 | Electric heating linkage defect simulation experiment transformer |
-
2022
- 2022-06-15 CN CN202210679642.3A patent/CN116559613A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117075002A (en) * | 2023-08-23 | 2023-11-17 | 西安工程大学 | Electric heating linkage defect simulation experiment transformer |
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