CN220491722U - Three-phase anti-resonance voltage transformer for gas-insulated switchgear - Google Patents
Three-phase anti-resonance voltage transformer for gas-insulated switchgear Download PDFInfo
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- CN220491722U CN220491722U CN202322119223.7U CN202322119223U CN220491722U CN 220491722 U CN220491722 U CN 220491722U CN 202322119223 U CN202322119223 U CN 202322119223U CN 220491722 U CN220491722 U CN 220491722U
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- insulated switchgear
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000004804 winding Methods 0.000 claims abstract description 13
- 230000007935 neutral effect Effects 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 230000005350 ferromagnetic resonance Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000005329 antiferromagnetic resonance Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000005291 magnetic effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Abstract
The utility model relates to a three-phase anti-resonance voltage transformer for a gas-insulated switchgear, comprising: the three-phase voltage transformer is arranged on the bottom plate, a wiring jack is arranged at the front end of the three-phase voltage transformer, circuits of the three-phase voltage transformer are connected in a star mode, and a fuse is arranged on each circuit; the single-stage voltage transformer comprises a wiring plug which is detachably matched and fixed with the wiring jack, and the single-stage voltage transformer comprises a winding iron core which can be grounded. The beneficial effects are that: through single-stage voltage transformer and original three-phase voltage transformer detachable assembly wiring, improved the reliability of circuit operation, and then make voltage transformer group operation safe and reliable, reduced the potential safety hazard, simultaneously, in order to avoid producing when resonance, voltage transformer produces the damage, guarantees that the staff looks up the trouble and discharges the trouble.
Description
Technical Field
The utility model relates to the technical field of medical equipment, in particular to a three-phase anti-resonance voltage transformer for a gas-insulated switchgear.
Background
In the power systems of China, especially in the voltage distribution systems, a large number of electromagnetic voltage transformers (PT) are operated, and the devices have nonlinear electromagnetic characteristics, and ferromagnetic resonance occurs when the devices are matched with the capacitive elements in the system, so that extremely high resonance overvoltage is generated. When the overvoltage occurs, the exciting current of the winding of the transformer is greatly increased due to the saturation of the iron core of the transformer, and can reach more than hundred times of the rated exciting current in severe cases, so that the high-voltage fuse of the transformer is fused, oil is sprayed, the winding is burnt out or even exploded, and the safe operation of a power grid is seriously threatened.
At present, a primary winding neutral point is generally connected with a resonance elimination device to eliminate ferromagnetic resonance, so that the effect is not ideal, the ferromagnetic resonance is not restrained, and the phenomena of fusing of a high-voltage fuse and burning of the voltage transformer still occur; the anti-ferromagnetic resonance voltage transformer adopts a three-phase three-column laminated iron core and a 'mouth' -shaped laminated iron core, a three-phase magnetic circuit is unbalanced, excitation characteristics are poor, third harmonic waves exist, waveforms are poor, the volume is large, and indoor products cannot be installed in a small-sized high-voltage switch cabinet, and the weight and the cost are high; the 4PT method is adopted to cast together or install the four independent voltage transformers together, the resonance eliminating effect is not ideal, the material cost is high, and the volume is large.
Therefore, the utility model provides a three-phase anti-resonance voltage transformer for a gas-insulated switchgear.
Disclosure of Invention
The utility model provides a three-phase anti-resonance voltage transformer for a gas-insulated switchgear, which aims to solve the problems in the prior art.
The technical problems solved by the utility model are realized by adopting the following technical scheme:
a three-phase antiresonant voltage transformer for a gas insulated switchgear, comprising:
the three-phase voltage transformer is arranged on the bottom plate, a wiring jack is arranged at the front end of the three-phase voltage transformer, circuits of the three-phase voltage transformer are connected in a star mode, and a fuse is arranged on each circuit;
the single-stage voltage transformer comprises a wiring plug which is detachably matched and fixed with the wiring jack, and the single-stage voltage transformer comprises a winding iron core which can be grounded so as to reduce resonance in a circuit.
As an optimal technical scheme, the neutral point end of the winding iron core of the single-stage voltage transformer is grounded through a wire.
As an optimal technical scheme, the wire of the winding iron core of the single-stage voltage transformer adopts an enameled wire with the diameter of 0.10-0.15 mm and the resistance value of 8-12 kΩ.
As a preferable technical scheme, the bottom of the single-stage voltage transformer is fixed on the bottom plate through a fastener.
As a preferable technical scheme, the external dimension of the main body of the voltage transformer is 1000-1100 mm in length, 520-580 mm in height and 600-700 mm in depth.
As a preferable technical scheme, the distances between the central points of the three fuses along the arrangement direction of the main body of the voltage transformer are 220-230 mm.
As a preferable technical scheme, the fuse adopts a high-voltage fuse.
As an optimal technical scheme, the single-stage voltage transformer is a 35KV voltage transformer.
The utility model has the beneficial effects that:
through single-stage voltage transformer and original three-phase voltage transformer detachable assembly wiring, improved the reliability of circuit operation, and then make voltage transformer group operation safe and reliable, reduced the potential safety hazard, simultaneously, in order to avoid producing when resonance, voltage transformer produces the damage, guarantees that the staff looks up the trouble and discharges the trouble.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from them without inventive faculty for a person skilled in the art.
Fig. 1 is a diagram of the present utility model: one of the structural schematic diagrams of the three-phase anti-resonance voltage transformer for the gas-insulated switchgear.
Fig. 2 is a diagram of the present utility model: and a second structural schematic diagram of the three-phase anti-resonance voltage transformer for the gas-insulated switchgear.
Fig. 3 is a diagram of the present utility model: a schematic cross-sectional structure of a three-phase anti-resonance voltage transformer for a gas-insulated switchgear.
Fig. 4 is a diagram of the present utility model: a wiring schematic diagram of a three-phase anti-resonance voltage transformer for a gas-insulated switchgear.
Wherein: 10-three-phase voltage transformer, 20-single-stage voltage transformer, 30-bottom plate, 11-wiring jack, 12-fuse, 21-winding iron core, 22-wiring plug.
Detailed Description
The utility model is further described with reference to the following detailed drawings in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the utility model easy to understand.
Example 1
Referring to fig. 1-4, a three-phase antiresonant voltage transformer for a gas-insulated switchgear, comprising: three-phase voltage transformer 10 and single-stage voltage transformer 20.
The three-phase voltage transformer 10 is arranged on a bottom plate 30, a wiring jack 11 is arranged at the front end of the three-phase voltage transformer 10, circuits of the three-phase voltage transformer 10 are connected in a star mode, and a fuse 12 is arranged on each circuit.
The single-stage voltage transformer 20 of the utility model comprises a wiring plug 22, the wiring plug 22 is detachably matched and fixed with the wiring jack 11, and the single-stage voltage transformer 20 comprises a winding iron core 21 which can be grounded so as to reduce resonance in a circuit. Wherein, the neutral point end of the winding iron core 21 of the single-stage voltage transformer 20 is grounded through a wire.
The wire of the winding iron core 21 of the single-stage voltage transformer 20 adopts enameled wires with the diameter of 0.10 mm-0.15 mm and the resistance value of 8k omega-12 k omega. By adopting the design, the single-stage voltage transformer 20 has high withstand voltage and good stability, so that the stability of the whole structure is improved, larger zero sequence voltage can be born, and resonance is reduced.
The bottom of the single-stage voltage transformer 20 of the present utility model is secured to the base plate 30 by fasteners.
The external dimension of the main body of the voltage transformer is 1000-1100 mm in length, 520-580 mm in height and 600-700 mm in depth, the distance between the central points of the three fuses 12 along the arrangement direction of the main body of the three-phase voltage transformer 10 is 220-230 mm, and the fuses 12 are high-voltage fuses 12.
The single-stage voltage transformer 20 of the present utility model is a 35KV voltage transformer.
The utility model has the advantages that the single-stage voltage transformer and the original three-phase voltage transformer are detachably assembled and connected, so that the running reliability of a line is improved, the running of the voltage transformer group is safe and reliable, the potential safety hazard is reduced, meanwhile, the voltage transformer is prevented from being damaged when resonance is generated, and the staff is ensured to find out and remove the faults.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
In the description of the present utility model, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "another end," "upper," "one side," "top," "inner," "front," "center," "two ends," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A three-phase anti-resonance voltage transformer for a gas-insulated switchgear, comprising:
the three-phase voltage transformer is arranged on the bottom plate, a wiring jack is arranged at the front end of the three-phase voltage transformer, circuits of the three-phase voltage transformer are connected in a star mode, and a fuse is arranged on each circuit;
the single-stage voltage transformer comprises a wiring plug which is detachably matched and fixed with the wiring jack, and the single-stage voltage transformer comprises a winding iron core which can be grounded so as to reduce resonance in a circuit.
2. The three-phase anti-resonance voltage transformer for a gas-insulated switchgear according to claim 1, wherein the neutral point end of the wound core of the single-stage voltage transformer is grounded through a wire.
3. The three-phase anti-resonance voltage transformer for the gas-insulated switchgear according to claim 1, wherein the wire of the winding iron core of the single-stage voltage transformer adopts an enameled wire with the diameter of 0.10 mm-0.15 mm and the resistance value of 8k omega-12 k omega.
4. The three-phase antiresonant voltage transformer for a gas-insulated switchgear of claim 1, wherein the bottom of the single-stage voltage transformer is fixed to the base plate by fasteners.
5. The three-phase anti-resonance voltage transformer for a gas-insulated switchgear according to claim 1, wherein the external dimension of the voltage transformer body is 1000-1100 mm in length, 520-580 mm in height and 600-700 mm in depth.
6. The three-phase antiresonant voltage transformer for gas-insulated switchgear according to claim 5, wherein the distance between the center points of the three fuses along the arrangement direction of the three-phase voltage transformer main body is 220-230 mm.
7. A three-phase antiresonant voltage transformer for a gas insulated switchgear as claimed in claim 1, wherein the fuse is a high voltage fuse.
8. The three-phase antiresonant voltage transformer for a gas-insulated switchgear according to claim 1, wherein the single-stage voltage transformer is a 35KV voltage transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322119223.7U CN220491722U (en) | 2023-08-08 | 2023-08-08 | Three-phase anti-resonance voltage transformer for gas-insulated switchgear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322119223.7U CN220491722U (en) | 2023-08-08 | 2023-08-08 | Three-phase anti-resonance voltage transformer for gas-insulated switchgear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220491722U true CN220491722U (en) | 2024-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322119223.7U Active CN220491722U (en) | 2023-08-08 | 2023-08-08 | Three-phase anti-resonance voltage transformer for gas-insulated switchgear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220491722U (en) |
-
2023
- 2023-08-08 CN CN202322119223.7U patent/CN220491722U/en active Active
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