CN210742394U - Transformer winding mechanical fault simulation system - Google Patents
Transformer winding mechanical fault simulation system Download PDFInfo
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- CN210742394U CN210742394U CN201920584350.5U CN201920584350U CN210742394U CN 210742394 U CN210742394 U CN 210742394U CN 201920584350 U CN201920584350 U CN 201920584350U CN 210742394 U CN210742394 U CN 210742394U
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Abstract
The utility model relates to the technical field of electrical equipment tests, and discloses a transformer winding mechanical fault simulation system, which comprises an excitation source for generating excitation voltage, a test cavity and a winding arranged in the test cavity, wherein the winding is provided with mechanical defects; wherein, the test cavity is filled with an insulating medium. The mechanical defects are arranged on the windings, so that the positions of the mechanical faults, the severity of the mechanical faults and the types of the mechanical faults can be flexibly adjusted in the process of detecting the mechanical faults of the transformer, and the mechanical characteristics of the transformer windings under the mechanical faults at different positions, the mechanical faults at different severity and the mechanical faults of different types can be obtained when excitation voltage generated by an excitation source can be transmitted to the windings with the mechanical faults in the test cavity, so that the comprehensiveness of detecting the mechanical faults of the transformer windings is improved.
Description
Technical Field
The utility model relates to an experimental technical field of electrical equipment especially relates to a transformer winding mechanical failure analog system.
Background
The power transformer is one of the core devices in the power system, and its safe operation plays a key role in the power system. In the operation process of the transformer, besides electrical faults, mechanical faults also occur, and particularly, various mechanical faults such as displacement, bulge, turn-to-turn short circuit and the like easily occur to a transformer winding. When the transformer has mechanical failure and suffers from external short circuit, the winding is easy to explode, which seriously affects the safe operation of the transformer.
At present, when a transformer mechanical fault detection research is carried out in a laboratory, a test model is needed, and the existing test model generally adopts a low-voltage-level solid transformer to simulate various mechanical faults, but the method can only manufacture fault types on a complete winding and cannot flexibly adjust fault positions, severity and various mixed faults, so that the analysis of detection results is not facilitated.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a transformer winding mechanical failure analog system can be in transformer mechanical failure testing process, nimble fault position, severity and fault type of adjusting to improve transformer winding mechanical failure testing's comprehensiveness.
In order to solve the technical problem, the utility model provides a transformer winding mechanical fault simulation system, including the excitation source, the test cavity that are used for producing excitation voltage and locate the winding in the test cavity, be equipped with mechanical defect on the winding, the output of excitation source passes the test cavity and is connected with one end of winding, the other end ground connection of winding; wherein, the test cavity is filled with an insulating medium.
Preferably, the winding comprises a plurality of winding segments, and the winding segments are connected in sequence; wherein at least one of the winding segments is provided with at least one of the mechanical defects.
Preferably, the mechanical defects provided on each of the winding segments are different.
Preferably, the mechanical defects include a winding displacement defect, a winding bulge defect, and a turn-to-turn short defect.
Preferably, the transformer winding mechanical fault simulation system further comprises a connecting line, and two adjacent winding sections are connected through the connecting line.
As a preferred scheme, the transformer winding mechanical fault simulation system further comprises an outgoing line; then the process of the first step is carried out,
the output end of the excitation source penetrates through the test cavity and is connected with one end of the winding, and the method specifically comprises the following steps:
the output end of the excitation source is connected with one end of the outgoing line, and the other end of the outgoing line penetrates through the test cavity and is connected with one end of the winding.
As a preferred scheme, the transformer winding mechanical fault simulation system further comprises a high-voltage bushing arranged at the top of the test cavity; then the process of the first step is carried out,
the other end of the outgoing line passes through the test cavity and is connected with one end of the winding, and the method specifically comprises the following steps:
and the other end of the outgoing line penetrates through the high-voltage bushing and is connected with one end of the winding.
Preferably, the insulating medium is any one of air, sulfur hexafluoride gas and transformer oil.
As a preferred scheme, the excitation voltage is any one of surge voltage, power frequency voltage, direct current voltage, square wave voltage and sweep frequency voltage.
Preferably, the material of the test cavity is metal.
The utility model provides a transformer winding mechanical fault simulation system, including excitation source, the experimental cavity that is used for producing excitation voltage and locate the winding in the experimental cavity, be equipped with mechanical defect on the winding, the output of excitation source passes the experimental cavity and is connected with one end of winding, the other end ground connection of winding; wherein, the test cavity is filled with an insulating medium. The mechanical defects are arranged on the winding, so that the position, the severity and the type of the mechanical faults can be flexibly adjusted in the transformer mechanical fault detection process, the output end of the excitation source penetrates through the test cavity and is connected with one end of the winding, the other end of the winding is grounded, the excitation voltage generated by the excitation source can be transmitted to the winding with the mechanical faults in the test cavity, and therefore the mechanical characteristics of the transformer winding under the mechanical faults at different positions, the mechanical faults with different severity and the mechanical faults of different types are obtained, and therefore the comprehensiveness of the transformer winding mechanical fault detection is improved.
Drawings
Fig. 1 is a schematic structural diagram of a transformer winding mechanical fault simulation system in an embodiment of the present invention.
Wherein, 1, an excitation source; 2. a test cavity; 3. a winding; 31. a winding section; 4. a connecting wire; 5. an outgoing line; 6. a high voltage bushing.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
The utility model discloses an in the explanation, the description in position such as upper and lower, left and right, top and bottom all is injectd to fig. 1, works as when transformer winding mechanical failure analog system's the mode of placement changes, the description in its corresponding position will also change according to the change of mode of placement, the utility model discloses do not describe here in detail.
As shown in fig. 1, the mechanical fault simulation system for transformer windings according to the preferred embodiment of the present invention includes an excitation source 1, a test cavity 2, and a winding 3 disposed in the test cavity 2, wherein a mechanical defect (not shown in the figure) is disposed on the winding 3, an output end of the excitation source 1 passes through the test cavity 2 and is connected to one end of the winding 3, and the other end of the winding 3 is grounded; wherein, the test cavity 2 is filled with an insulating medium; the excitation source 1 is used to generate an excitation voltage.
The embodiment of the utility model provides an in, through set up on the winding 3 mechanical defect for can be in transformer mechanical fault detection process, adjust mechanical fault's position, mechanical fault's severity and mechanical fault's type in a flexible way, and pass through excitation source 1's output passes experimental cavity 2 and with the one end of winding 3 is connected, winding 3's other end ground connection makes excitation voltage that excitation source 1 produced can transmit to on the winding 3 that has mechanical defect in experimental cavity 2, thereby obtain under the mechanical fault of different positions, the mechanical fault of different severity and the mechanical fault of different grade type, transformer winding's mechanical characteristics, consequently improved transformer winding mechanical fault detection's comprehensiveness.
In the embodiment of the present invention, in order to facilitate the grounding of the other end of the winding 3, preferably, the grounding of the test cavity 2 is performed in this embodiment, and the other end of the winding 3 is connected to the inner wall of the test cavity 2. The test cavity 2 is grounded, and the other end of the winding 3 is connected to the inner wall of the test cavity 2, so that the other end of the winding 3 is grounded.
In the embodiment of the present invention, the winding 3 includes a plurality of winding segments 31, and the plurality of winding segments 31 are connected in sequence; wherein at least one of said winding segments 31 is provided with at least one of said mechanical defects.
It should be noted that, in this embodiment, the mechanical defect may be set on the winding 3 according to actual conditions, for example, the mechanical defect may be set on each of the winding segments 31, or the mechanical defect may be set on only a part of the winding segments 31; of course, the number of the mechanical defects provided in one winding segment 31 may also be adjusted according to actual use conditions, for example, one mechanical defect or a plurality of mechanical defects may be provided in one winding segment 31, which is not limited by the present invention; by adjusting the number of mechanical defects arranged on the winding 3, the severity of the fault can be adjusted, thereby improving the convenience of the transformer winding mechanical fault simulation system.
In addition, the types of the mechanical defects disposed on each of the winding segments 31 in the present embodiment may be set to be the same or different; preferably, the mechanical defects provided on each of the winding segments 31 in this embodiment are different. By setting the mechanical defects on each of the winding sections 31 to be different, a transformer hybrid fault is obtained, so that the mechanical characteristics of the transformer winding in the case of multiple mechanical faults can be studied, and therefore, the comprehensiveness of the detection of the mechanical faults of the transformer winding is further ensured.
In the embodiment of the present invention, for the transformer winding, the mechanical failure is mainly a failure caused by insufficient mechanical strength of the transformer winding itself; once the transformer winding has mechanical failure, the discharge phenomenon can not be generated, but the phenomena of aggravation of mechanical vibration, insufficient short-circuit resistance and the like can be caused. Therefore, the type of the mechanical defect disposed on the winding 3 in this embodiment may be set according to actual conditions, and only the requirement of ensuring that a mechanical fault of an actual transformer winding can be simulated is satisfied. Preferably, the mechanical defects in this embodiment include a winding displacement defect, a winding bulge defect, and a turn-to-turn short defect. Specifically, when the mechanical defect is the winding displacement defect, the winding displacement defect may be provided on the winding segment 31 by: one winding segment 31 of the windings 31 is in an asymmetric arrangement; when the mechanical defect is the winding swell defect, the winding swell defect may be provided on the winding segment 31 by: arranging the winding segments 31 to bulge; when the mechanical defect is the inter-turn short defect, the inter-turn short defect may be disposed on the winding segment 31 by: the turns in the winding section 31 are shorted.
In the embodiment of the present invention, the winding 3 adopts a segmented structure, and specifically, the winding segments 31 are connected in series to form the winding 3. Wherein, the quantity of winding section 31 can set up according to actual use condition, and every parameter such as the number of turns, size and thickness of winding section 31 also can set up according to actual use condition, for example every parameter such as the number of turns, size and thickness of winding section 31 can set up to the same, certainly also can set up to the difference, the utility model discloses do not limit to this.
In addition, when the winding 3 includes a plurality of winding segments 31, in order to facilitate the detachment and installation between the plurality of winding segments 31, so as to adjust the position of the winding segment 31 having the mechanical defect in the winding 3, the partial discharge detection and positioning test system for the transformer winding in this embodiment further includes a connection line 4, and two adjacent winding segments 31 are connected through the connection line 4. Through setting up connecting wire 4 so that dismantlement and installation between the winding section 31 to be convenient for in transformer mechanical failure detection process, the position of nimble mechanical failure of adjusting has then improved the convenience that transformer winding partial discharge detected and positioning test system used.
As shown in fig. 1, in order to facilitate leading the excitation voltage output by the excitation source 1 to the winding 3 in the test chamber 2, the transformer winding mechanical fault simulation system in this embodiment further includes a lead-out wire 5; then the process of the first step is carried out,
the output end of the excitation source 1 penetrates through the test cavity 2 and is connected with one end of the winding 3, and the specific steps are as follows:
the output end of the excitation source 1 is connected with one end of the outgoing line 5, and the other end of the outgoing line 5 penetrates through the test cavity 2 and is connected with one end of the winding 3. By arranging the outgoing line 5 and connecting the output end of the excitation source 1 with one end of the outgoing line 5, the other end of the outgoing line 5 penetrates through the test cavity 2 and is connected with one end of the winding 3, so that the excitation voltage output by the excitation source 1 is conveniently led to the winding 3.
In the embodiment of the present invention, in order to further facilitate transmission of the excitation voltage output by the excitation source 1 to the winding 3 in the test cavity 2, the transformer winding mechanical fault simulation system in this embodiment further includes a high voltage bushing 6 disposed at the top of the test cavity 2; then the process of the first step is carried out,
the other end of the outgoing line 5 passes through the test cavity 2 and is connected with one end of the winding 3, and the method specifically comprises the following steps:
the other end of the lead-out wire 5 passes through the high voltage bushing 6 and is connected with one end of the winding 3. The high-voltage bushing 6 is arranged on the top of the test cavity 2, so that the excitation voltage output by the excitation source 1 is further conveniently led to the winding 3 in the test cavity 2 through the lead-out wire 5.
In the embodiment of the present invention, the type of the excitation voltage output by the excitation source 1 can be set according to the actual use condition, so as to satisfy the requirement of researching the mechanical characteristics of the transformer winding under any excitation voltage type. Preferably, in this embodiment, the excitation voltage is any one of a surge voltage, a power frequency voltage, a direct current voltage, a square wave voltage, and a swept frequency voltage.
In the embodiment of the present invention, the type of the insulating medium filled in the test cavity 2 can be set according to the actual use condition, and only the requirement of ensuring good insulating property is satisfied; in this embodiment, the insulating medium is any one of air, sulfur hexafluoride gas, and transformer oil. In order to simulate the structure of an actual transformer, preferably, the insulating medium is transformer oil.
In addition, in order to make the test chamber 2 to be matched with an actual transformer to the maximum extent and ensure the safety of the mechanical fault detection of the transformer, the test chamber 2 is made of metal in this embodiment.
The embodiment of the utility model provides an in, transformer winding mechanical fault analog system's theory of operation specifically is: filling the test cavity 2 with an insulating medium, and arranging the winding 3 in the test cavity 2 to simulate an actual transformer structure; the excitation source 1 generates an excitation voltage, and the excitation voltage is transmitted to the winding 3 provided with the mechanical defect through the outgoing line 5 and the high-voltage bushing 6, so that the mechanical characteristics of a transformer winding under the condition of mechanical failure are researched; the mechanical defects arranged on the winding 3 can be adjusted according to actual conditions, and specifically, the mechanical characteristics of the transformer winding under mechanical faults at different positions, mechanical faults at different severity degrees and mechanical faults of different types can be obtained by adjusting the positions, the severity degrees and the types of the mechanical defects on the winding 3, so that the comprehensiveness of the mechanical fault detection of the transformer winding is improved.
To sum up, the utility model provides a transformer winding mechanical fault simulation system, including excitation source 1, experimental cavity 2 and the winding 3 of locating in experimental cavity 2 that is used for producing excitation voltage, be equipped with mechanical defect on the winding 3, the output of excitation source 1 passes experimental cavity 2 and is connected with one end of winding 3, the other end ground connection of winding 3; wherein, the test cavity 2 is filled with an insulating medium. The mechanical defects are arranged on the winding 3, so that the position, the severity and the type of the mechanical faults can be flexibly adjusted in the transformer mechanical fault detection process, the output end of the excitation source 1 penetrates through the test cavity 2 and is connected with one end of the winding 3, the other end of the winding 3 is grounded, excitation voltage generated by the excitation source 1 can be transmitted to the winding 3 with the mechanical faults in the test cavity 2, and therefore the mechanical characteristics of the transformer winding under the mechanical faults at different positions, the mechanical faults with different severity and the mechanical faults of different types are obtained, and therefore the comprehensiveness of the transformer winding mechanical fault detection is improved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (10)
1. A mechanical fault simulation system for a transformer winding is characterized by comprising an excitation source for generating excitation voltage, a test cavity and a winding arranged in the test cavity, wherein the winding is provided with mechanical defects; wherein, the test cavity is filled with an insulating medium.
2. The transformer winding mechanical fault simulation system of claim 1, wherein the winding comprises a plurality of winding segments, and the plurality of winding segments are connected in series; wherein at least one of the winding segments is provided with at least one of the mechanical defects.
3. The transformer winding mechanical fault simulation system of claim 2, wherein the mechanical defects provided on each of the winding segments are different.
4. The transformer winding mechanical fault simulation system of any of claims 1-3, wherein the mechanical defects comprise a winding displacement defect, a winding bulge defect, and a turn-to-turn short defect.
5. The transformer winding mechanical fault simulation system of claim 2, further comprising a connection line through which adjacent two of the winding segments are connected.
6. The transformer winding mechanical fault simulation system of any of claims 1-3, further comprising an outlet;
the output end of the excitation source is connected with one end of the outgoing line, and the other end of the outgoing line penetrates through the test cavity and is connected with one end of the winding.
7. The transformer winding mechanical fault simulation system of claim 6, further comprising a high voltage bushing disposed at a top of the test chamber; then the process of the first step is carried out,
the other end of the outgoing line passes through the test cavity and is connected with one end of the winding, and the method specifically comprises the following steps:
and the other end of the outgoing line penetrates through the high-voltage bushing and is connected with one end of the winding.
8. A mechanical fault simulation system for a winding of a transformer according to any of claims 1-3, characterized in that the insulating medium is any of air, sulphur hexafluoride gas and transformer oil.
9. The mechanical fault simulation system of transformer windings according to any one of claims 1-3, wherein the excitation voltage is any one of surge voltage, line frequency voltage, direct current voltage, square wave voltage and swept frequency voltage.
10. The mechanical fault simulation system of transformer windings according to any of claims 1-3, wherein the material of the test chamber is metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920584350.5U CN210742394U (en) | 2019-04-25 | 2019-04-25 | Transformer winding mechanical fault simulation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920584350.5U CN210742394U (en) | 2019-04-25 | 2019-04-25 | Transformer winding mechanical fault simulation system |
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| Publication Number | Publication Date |
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| CN210742394U true CN210742394U (en) | 2020-06-12 |
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| CN201920584350.5U Active CN210742394U (en) | 2019-04-25 | 2019-04-25 | Transformer winding mechanical fault simulation system |
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| CN (1) | CN210742394U (en) |
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