CN217008875U - Anti-resonance GIS electromagnetic voltage transformer - Google Patents
Anti-resonance GIS electromagnetic voltage transformer Download PDFInfo
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- CN217008875U CN217008875U CN202220698935.1U CN202220698935U CN217008875U CN 217008875 U CN217008875 U CN 217008875U CN 202220698935 U CN202220698935 U CN 202220698935U CN 217008875 U CN217008875 U CN 217008875U
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Abstract
The utility model provides an anti-resonance GIS electromagnetic voltage transformer, which relates to the technical field of voltage transformers and specifically comprises the following components: a housing; the top of the shell is provided with a basin-type insulator; a winding and an iron core are arranged in the shell; a bottom plate is arranged at the bottom of the shell; the basin-type insulator is provided with a shielding pipe; the bottom end of the shielding pipe is connected with a high-voltage shielding cover; the high-voltage shielding cover is connected with the winding; the winding is sleeved on the iron core, and the iron core is connected with the bottom plate. The voltage transformer adopts a low-loss high-saturation iron core, the rated magnetic density of the iron core is less than 0.55T, the excitation loss of the iron core is reduced, and the saturation characteristic of the iron core is improved; by adopting the high-voltage shielding cover with a full shielding structure, the stray capacitance of the high-voltage side and the capacitance of the high-voltage ground are increased, the internal capacitance of the product is ensured to be larger than the inductance, and the ferromagnetic resonance valve can be eliminated. And an over-current generated by ferromagnetic resonance is eliminated through a resonance elimination device arranged in the terminal box.
Description
Technical Field
The utility model relates to the technical field of voltage transformers, in particular to an anti-resonance GIS electromagnetic voltage transformer.
Background
As important power equipment for voltage monitoring and protection sampling, a voltage transformer is generally arranged on incoming lines, outgoing lines and bus loops of a power station switching station.
At present, a GIS electromagnetic voltage transformer is widely applied to gas insulated metal enclosed switchgear. Because the GIS electromagnetic voltage transformer has the characteristic of presenting nonlinearity after entering a saturation region, the GIS electromagnetic voltage transformer and a capacitor element in a loop can form an oscillating loop under certain conditions, ferromagnetic resonance with longer duration can be excited, the voltage transformer is damaged, and the safe operation of a system is influenced under extreme conditions.
SUMMERY OF THE UTILITY MODEL
The utility model provides an anti-resonance GIS electromagnetic voltage transformer which can eliminate over-current generated by ferromagnetic resonance and prevent ferromagnetic resonance generated in the switching operation process of gas insulated metal-enclosed switchgear.
The method specifically comprises the following steps: a housing; the top of the shell is provided with a basin-type insulator; a winding and an iron core are arranged in the shell; a bottom plate is arranged at the bottom of the shell;
a shielding pipe is arranged on the basin-type insulator;
the bottom end of the shielding pipe is connected with a high-voltage shielding cover;
the high-voltage shielding cover is connected with the winding;
the winding is sleeved on the iron core,
the iron core is connected with the bottom plate.
It is further noted that the self-sealing valve and the terminal box assembly are mounted on the exterior of the housing.
It should be further noted that the terminal box assembly includes: the terminal box, the wiring board, the terminal strip and the resonance elimination device;
a secondary outgoing line of the winding is connected with the wiring board;
the wiring board is fixedly arranged on the outer side surface of the shell; the wiring board is connected with the terminal strip through a wire;
the terminal strip and the resonance elimination device are respectively fixed in the terminal box, and the terminal strip and the resonance elimination device are respectively electrically connected with a secondary circuit of the winding.
It is further noted that the bottom plate is provided with an explosion-proof device;
the explosion-proof device extends out of the shell.
It is further noted that at least three support legs are arranged at the bottom of the bottom plate;
at least three supporting legs are uniformly arranged at the bottom of the bottom plate.
It should be further noted that the bottom plate is connected with the side wall of the housing by welding.
The bottom plate is provided with an adsorbent.
It should be further noted that the iron core is a low-loss high-saturation iron core, and the rated magnetic density of the iron core is less than 0.55T.
It is further noted that the width of the high voltage shield is greater than the width of the windings.
It is further noted that a top flange is arranged at the top of the shell; the basin-type insulator is provided with a mounting flange matched with the top flange;
the top flange is connected with the mounting flange through a bolt;
the shielding pipe is connected with the center of the basin-type insulator in a threaded connection mode.
According to the technical scheme, the utility model has the following advantages:
in the anti-resonance GIS electromagnetic voltage transformer provided by the utility model, the low-loss high-saturation iron core is adopted, the rated magnetic density of the iron core is less than 0.55T, the excitation loss of the iron core is reduced, and the saturation characteristic of the iron core is improved.
The utility model adopts the high-voltage shielding cover with a full shielding structure, increases the stray capacitance of the high-voltage side and the capacitance of the high-voltage ground, ensures that the internal capacitance of the product is greater than the inductance, and can eliminate the ferromagnetic resonance valve. The over-current generated by the ferromagnetic resonance is eliminated by the resonance elimination device installed in the terminal box.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an anti-resonance GIS electromagnetic voltage transformer;
fig. 2 is a schematic view of a terminal box assembly.
Description of reference numerals:
1-basin insulator, 2-shielding tube, 3-shell, 4-winding, 5-high-voltage shielding cover, 6-iron core, 7-self-sealing valve, 8-terminal box component, 9-bottom plate, 10-adsorbent, 11-explosion-proof device, 12-supporting leg, 13-terminal box, 14-wiring board, 15-terminal row and 16-resonance elimination device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 and 2, the present invention provides an anti-resonance GIS electromagnetic voltage transformer, including: a housing 3; the overall shape of the housing 3 is an upper and lower opening, wherein the cross-sectional area of the upper opening is smaller than the cross-sectional area of the lower opening. The side wall of the shell close to the upper opening is provided with an arc transition section, so that the requirements of pressure resistance and adaptation to the process environment can be met.
The bottom of the shell 3 is provided with a bottom plate 9; the bottom plate 9 and the side wall of the housing 3 may be connected by welding or by flange, and the specific connection mode is not limited. At least three supporting legs 12 are arranged at the bottom of the bottom plate 9; at least three supporting legs 12 are uniformly arranged at the bottom of the bottom plate 9.
The bottom plate 9 is provided with an explosion-proof device 11; the explosion-proof means 11 protrudes outside the housing 3. Because the shell 3 is a closed container in a using state, if the pressure inside the shell exceeds a certain threshold value, the explosion can be prevented by the pressure relief of the explosion-proof device 11.
The top of the shell 3 is provided with a basin-type insulator 1; specifically, the top of the housing 3 is provided with a top flange; the basin-type insulator 1 is provided with a mounting flange matched with the top flange; the top flange is connected with the mounting flange through a bolt; the shielding pipe 2 is connected with the center position of the basin-type insulator 1 in a threaded connection mode.
A winding 4 and an iron core 6 are arranged in the shell 3; the basin-type insulator 1 is provided with a shielding pipe 2; the bottom end of the shielding tube 2 is connected with a high-voltage shielding cover 5; the high-voltage shielding cover 5 is connected with the winding 4; the width of the high-voltage shielding case 5 is larger than that of the winding 4, so that the insulation effect can be improved, resonance vibration can be prevented, and the stable operation of the voltage transformer can be ensured.
The winding 4 is sleeved on the iron core 6, and the iron core 6 is connected with the bottom plate 9. The bottom plate 9 is provided with an adsorbent 10.
The core 6 may be configured with two core supports arranged in parallel, which support the core body in a suitable position on top. So that the winding 4 is sleeved on the iron core body. The iron core 6 is a low-loss high-saturation iron core, and the rated magnetic density of the iron core is less than 0.55T. The excitation loss of the iron core is reduced, and the saturation characteristic of the iron core is improved. The low-loss high-saturation iron core can adopt a nanocrystalline stator iron core. The nanocrystalline stator core has the advantages of more obvious low loss and high magnetic conductivity, and is suitable for application occasions with higher working frequency and higher requirements on the efficiency of the motor. And a silicon steel stator core can be adopted, the working frequency of the silicon steel stator core is below 400Hz, the noise of the silicon steel stator core is low, and the stability is good.
The utility model adopts the high-voltage shielding cover with a full shielding structure, increases the stray capacitance of the high-voltage side and the capacitance of the high-voltage ground, ensures that the internal capacitance of the product is greater than the inductance, and can eliminate the ferromagnetic resonance valve.
In the present invention, a self-sealing valve 7 and a terminal box assembly 8 are mounted on the outside of the housing 3. The self-sealing valve 7 and the terminal box assembly 8 may be relatively disposed outside the housing, and may be disposed at a vertically central position of the housing.
The terminal box assembly 8 includes: terminal box 13, terminal block 14, terminal block 15 and resonance-eliminating device 16.
The secondary outgoing line of the winding 4 is connected with the wiring board 14; the wiring board 14 is fixedly mounted on the outer side surface of the housing 3; the wiring board 14 and the terminal block 15 are connected by wires; the terminal block 15 and the resonance elimination device 16 are fixed in the terminal box 13, respectively, and the terminal block 15 and the resonance elimination device 16 are electrically connected to the secondary circuit of the winding 4, respectively. The over-current generated by ferromagnetic resonance is eliminated through the resonance elimination device 16 arranged in the terminal box 13, and the stable operation of the GIS electromagnetic voltage transformer is ensured.
The problem that the conventional GIS electromagnetic voltage transformer is easy to generate ferromagnetic resonance in gas insulated metal enclosed switchgear is solved based on the resonance-proof GIS electromagnetic voltage transformer. The valve can ensure that the internal capacitance of the product is larger than the inductance value and eliminate ferromagnetic resonance.
In the anti-resonance GIS electromagnetic voltage transformer provided by the present invention, when an element or layer is referred to as being "on" or "connected" or "coupled" to another element or layer, it may be directly on, connected or coupled to the other element or layer, or intervening elements or layers may also be present. In contrast, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element or layer, there are no intervening elements or layers present. Like numbers refer to like elements throughout. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the present invention, spatially relative terms such as "under …", "below", "lower", "above", "upper", and the like may be used for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative terms used herein should be interpreted accordingly.
The terms used in the anti-resonance GIS electromagnetic voltage transformer provided by the present invention are only used to describe the specific embodiments, and are not intended to limit the description in this document. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides an anti-resonance type GIS electromagnetic type voltage transformer which characterized in that includes: a housing (3); the top of the shell (3) is provided with a basin-type insulator (1); a winding (4) and an iron core (6) are arranged in the shell (3); a bottom plate (9) is arranged at the bottom of the shell (3);
the basin-type insulator (1) is provided with a shielding pipe (2);
the bottom end of the shielding pipe (2) is connected with a high-voltage shielding cover (5);
the high-voltage shielding cover (5) is connected with the winding (4);
the winding (4) is sleeved on the iron core (6),
the iron core (6) is connected with the bottom plate (9).
2. The resonance-proof GIS electromagnetic voltage transformer according to claim 1,
the self-sealing valve (7) and the terminal box assembly (8) are arranged outside the shell (3).
3. The resonance-proof GIS electromagnetic voltage transformer according to claim 2,
the terminal box assembly (8) comprises: a terminal box (13), a wiring board (14), a terminal strip (15) and a resonance elimination device (16);
the secondary outgoing line of the winding (4) is connected with the wiring board (14);
the wiring board (14) is fixedly arranged on the outer side surface of the shell (3); the wiring board (14) is connected with the terminal strip (15) through a wire;
the terminal strip (15) and the resonance elimination device (16) are respectively fixed in the terminal box (13), and the terminal strip (15) and the resonance elimination device (16) are respectively electrically connected with a secondary circuit of the winding (4).
4. The resonance-proof GIS electromagnetic voltage transformer according to claim 1 or 2,
an explosion-proof device (11) is arranged on the bottom plate (9);
the explosion-proof device (11) extends out of the shell (3).
5. The resonance-proof GIS electromagnetic voltage transformer according to claim 1 or 2,
at least three supporting legs (12) are arranged at the bottom of the bottom plate (9);
at least three supporting legs (12) are uniformly arranged at the bottom of the bottom plate (9).
6. The resonance-proof GIS electromagnetic voltage transformer according to claim 1 or 2,
the bottom plate (9) is connected with the side wall of the shell (3) in a welding mode.
7. The resonance-proof GIS electromagnetic voltage transformer according to claim 1 or 2,
the bottom plate (9) is provided with an adsorbent (10).
8. The resonance-proof GIS electromagnetic voltage transformer according to claim 1 or 2,
the iron core (6) adopts a low-loss high-saturation iron core, and the rated magnetic density of the iron core is less than 0.55T.
9. The resonance-proof GIS electromagnetic voltage transformer according to claim 1 or 2,
the width of the high-voltage shielding cover (5) is larger than that of the winding (4).
10. The resonance-proof GIS electromagnetic voltage transformer according to claim 1 or 2,
the top of the shell (3) is provided with a top flange; the basin-type insulator (1) is provided with an installation flange matched with the top flange;
the top flange is connected with the mounting flange through a bolt;
the shielding pipe (2) is connected with the center of the basin-type insulator (1) in a threaded connection mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220698935.1U CN217008875U (en) | 2022-03-28 | 2022-03-28 | Anti-resonance GIS electromagnetic voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220698935.1U CN217008875U (en) | 2022-03-28 | 2022-03-28 | Anti-resonance GIS electromagnetic voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217008875U true CN217008875U (en) | 2022-07-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220698935.1U Active CN217008875U (en) | 2022-03-28 | 2022-03-28 | Anti-resonance GIS electromagnetic voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217008875U (en) |
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- 2022-03-28 CN CN202220698935.1U patent/CN217008875U/en active Active
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