CN110875117A - Combined three-phase integrated electronic current and voltage transformer - Google Patents
Combined three-phase integrated electronic current and voltage transformer Download PDFInfo
- Publication number
- CN110875117A CN110875117A CN201911402838.2A CN201911402838A CN110875117A CN 110875117 A CN110875117 A CN 110875117A CN 201911402838 A CN201911402838 A CN 201911402838A CN 110875117 A CN110875117 A CN 110875117A
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- Prior art keywords
- shielding cylinder
- shell
- current
- current coil
- voltage transformer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/34—Combined voltage and current transformers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
The invention relates to a combined three-phase integrated electronic current-voltage transformer, which comprises a shell, a primary conducting rod, a current coil shielding cylinder, a current coil, a shielding cylinder, a grounding electrode, a basin-type insulator, an explosion-proof sheet and the like, wherein an upper positioning flange is fixedly arranged on the shell at the upper half part of the shell; the primary conducting rod is connected with the conductor of the basin-type insulator; a current coil shielding cylinder is fixedly arranged on the lower positioning flange; the current coil is arranged at the periphery of the current coil shielding cylinder; a shielding cylinder is arranged at the periphery of the primary conducting rod, one end of the shielding cylinder is connected with the primary conducting rod, and the other end of the shielding cylinder is insulated and separated from the primary conducting rod; because the current transformer and the voltage transformer are combined into a whole, the whole machine has compact structure and small volume; because the shell, the shielding cylinder, the primary guide rod and the electrode are all made of aluminum alloy with low expansion coefficient, and each port is designed into an arc-shaped form, the point discharge is reduced, and the internal electric field is uniform.
Description
Technical Field
The invention relates to an electronic transformer used in the power industry, in particular to a combined three-phase integrated electronic current and voltage transformer.
Background
The existing high-voltage transformer is mainly divided into a voltage transformer and a current transformer. The high-voltage current transformers are further divided into oil-immersed current transformers and sulfur hexafluoride current transformers. Due to the structure, the oil immersed current transformer and the sulfur hexafluoride current transformer are generally provided with iron cores, data are converted by adopting electromagnetic induction, and the current transformers have the magnetic saturation phenomenon due to the use of the iron cores, so that the electromagnetic induction capacity is obviously reduced, and the overall weight is obviously heavier under the conditions of large volume and the like. Although the existing electronic current transformer and voltage transformer overcome the defects of large size and heavy weight of an electromagnetic induction transformer, the existing electronic current transformer and voltage transformer only have the structural forms of an independent current transformer and an independent voltage transformer. Although the weight of the whole electronic current and voltage transformer is obviously reduced, the whole electronic current and voltage transformer is difficult to be uniformly distributed in the internal electric field due to the structure, the shielding effect and the anti-interference capability of the electronic current and voltage transformer are poor, and the requirement of high-performance test is difficult to meet, so that the existing combined electronic current and voltage transformer needs to be improved to improve the use effect of equipment.
Disclosure of Invention
The invention aims to provide a combined three-phase common-body electronic current and voltage transformer which is improved on the basis of the existing electronic transformer, has a good shielding effect, and is simple and compact in structure and uniform in electric field distribution.
The invention is technically characterized in that: on considering that electric field distribution is even, the high basis of measurement accuracy, design into by casing, basin formula insulator, a conducting rod, a current coil shielding section of thick bamboo, current coil, lower flange, explosion-proof piece, collection box, looks electrode, go up flange, shielding section of thick bamboo and constitute its characterized in that: an upper positioning flange is fixedly arranged on the upper half shell of the shell; the basin-type insulator is connected with the shell; the primary conducting rod is connected with the conductor of the basin-type insulator; a current coil shielding cylinder is fixedly arranged on the lower positioning flange; a current coil is arranged at the periphery of the current coil shielding cylinder; the three groups of primary conducting rods, the current coil shielding cylinder and the current coil are uniformly distributed in the shell to form a three-phase electronic current transformer; a shielding cylinder is arranged at the periphery of the primary conducting rod, one end of the shielding cylinder is connected with the lower positioning flange, and the other end of the shielding cylinder is insulated and separated from the primary conducting rod, so that the shielding cylinder forms a high-voltage electrode; a lower positioning flange is fixedly arranged on the lower half shell of the shell; a grounding electrode is fixedly arranged on the lower positioning flange; a collecting box is fixedly arranged on the lower half part of the shell and is used as a connecting position for mounting a collecting card and connecting wires; the bottom of the shell is provided with an explosion-proof sheet mounting position, and the inner cavity of the shell is filled with sulfur hexafluoride gas.
The shell is a metal cylinder made of low-expansion-coefficient aluminum alloy, the outer surface of the upper half shell of the shell is of an arc-shaped structure, and the outer surface of the lower half shell of the shell is of an arc-shaped structure.
The current coil shielding cylinder shields output signals of a secondary winding formed by the current coil in a sealing manner, and a framework of a winding coil of the current coil shielding cylinder is a frame body made of a non-magnetic material.
The shielding cylinder is a metal cylinder body made of low-expansion coefficient aluminum alloy, so that a high-voltage electrode is formed, and the end part of the cylinder body is of an arc-shaped structure.
The middle electrode is a metal arc-shaped cylinder made of low-expansion-coefficient aluminum alloy, and the upper end part of the middle electrode is of a warping structure.
When the device is used, current is introduced into the upper basin-type insulator through the conducting rod, the current is introduced into the shell through the primary conducting rod, the current is induced on the current coil of the secondary winding through electromagnetic induction, an output signal is input into the secondary output junction box, the induced output signal is converted into a digital output signal through acquisition of an analog output signal of the acquired output signal by the acquisition device, and the digital output signal is sent into the control room for data detection and acquisition; the current in the primary conducting rod acts with a shielding cylinder fixedly arranged on the primary conducting rod again to form a high potential and output an electromagnetic induction output signal through induction, so that the number is collected. The ends of the shielding cylinder and the electrode are designed into arc shapes, and the purpose is to reduce point discharge and make the internal electric field uniform; the shielding cylinder, the electrode and the shell are made of aluminum alloy with low expansion coefficient, and the purpose is to reduce the unstable data caused by temperature change.
The invention has the advantages that: because the current transformer and the voltage transformer are combined into a whole and arranged in the shell, the whole machine has compact structure and small volume; because the three groups of electrode devices are uniformly distributed in the shell, the internal electric field is uniformly distributed; the outer part of the shell is designed into a circular arc state, so that the whole self-cleaning performance is good; the shielding cylinder, the electrode and the shell are all made of aluminum alloy with low expansion coefficient, so that the whole body has small change along with temperature and reliable performance; the shielding cylinder is fixedly arranged on the primary conducting rod, so that the shielding cylinder not only has the shielding function, but also can play the role of a high-voltage electrode, and the purpose of achieving multiple purposes is achieved; because the ports of the shielding cylinder and the electrode are designed into arc shapes, point discharge is reduced, and the internal electric field is uniform; the sulfur hexafluoride gas is adopted for insulation protection inside the cable, so that the cable has good insulation performance; because of compact, reasonable and simple structure and reliable performance, the device has great practical and popularization value.
Drawings
Fig. 1 is a schematic structural diagram of a combined three-phase common-body electronic current-voltage transformer (only a phase is shown in the figure, and B, C phases are distributed and shown in fig. 2).
Fig. 2 is a schematic view of the right side of fig. 1.
Fig. 3 is a schematic structural diagram of a conducting rod of a combined three-phase integrated electronic current-voltage transformer.
Fig. 4 is a schematic structural diagram of a capacitor shielding cylinder of a combined three-phase integrated electronic current-voltage transformer.
Fig. 5 is a schematic structural diagram of a medium current shielding cylinder of a combined three-phase common-body electronic current-voltage transformer.
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.
An upper positioning flange (130) is fixedly arranged on the upper half shell of the shell (010); the basin-type insulator (020) is connected with the shell (010); the primary conductive rod (030) is connected with a conductor of the basin-type insulator (020); a current coil shielding cylinder (040) is fixedly arranged on the lower positioning flange (060); a current coil (050) is arranged on the periphery of the current coil shielding cylinder (040); three groups of primary conducting rods (090, 110 and 120), a current coil shielding cylinder (040) and a current coil (050) are uniformly distributed in a shell (010) to form a three-phase electronic current transformer; a shielding cylinder (140) is arranged on the periphery of the primary conductive rod (030), one end of the shielding cylinder (140) is connected with the lower positioning flange (060), and the other end of the shielding cylinder (140) is insulated and separated from the primary conductive rod (030), so that the shielding cylinder (140) forms a high-voltage electrode; a lower positioning flange (060) is fixedly arranged on the lower half shell of the shell (010); a grounding electrode is fixedly arranged on the lower positioning flange (060); a collecting box (080) is fixedly arranged on the lower half part of the shell (010) and is used as a connecting position for installing a collecting card and connecting wires; the bottom of the shell (010) is provided with an explosion-proof sheet (070) installation position, and the inner cavity of the shell (010) is filled with sulfur hexafluoride gas.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. The utility model provides a modular three-phase is body electron current voltage transformer altogether, by casing (010), basin formula insulator (020), once conducting rod (030), current coil shielding section of thick bamboo (040), current coil (050), lower flange (060), explosion-proof piece (070), collection box (080), B looks electrode (090), C looks electrode (110), A looks electrode (120), go up flange (130), shielding section of thick bamboo (140) and constitute, its characterized in that: an upper positioning flange (130) is fixedly arranged on the upper half shell of the shell (010); the basin-type insulator (020) is connected with the shell (010); the primary conductive rod (030) is connected with a conductor of the basin-type insulator (020); a current coil shielding cylinder (040) is fixedly arranged on the lower positioning flange (060); a current coil (050) is arranged on the periphery of the current coil shielding cylinder (040); three groups of primary conducting rods (090, 110 and 120), a current coil shielding cylinder (040) and a current coil (050) are uniformly distributed in a shell (010) to form a three-phase electronic current transformer; a shielding cylinder (140) is arranged on the periphery of the primary conductive rod (030), one end of the shielding cylinder (140) is connected with the lower positioning flange (060), and the other end of the shielding cylinder (140) is insulated and separated from the primary conductive rod (030), so that the shielding cylinder (140) forms a high-voltage electrode; a lower positioning flange (060) is fixedly arranged on the lower half shell of the shell (010); a grounding electrode is fixedly arranged on the lower positioning flange (060); a collecting box (080) is fixedly arranged on the lower half part of the shell (010) and is used as a connecting position for installing a collecting card and connecting wires; the bottom of the shell (010) is provided with an explosion-proof sheet (070) installation position, and the inner cavity of the shell (010) is filled with sulfur hexafluoride gas.
2. The combined three-phase common-body electronic current-voltage transformer of claim 1, wherein: casing (010) be the metal barrel who adopts low expansion coefficient aluminum alloy to make for the material, the first half casing surface of casing (010) is arc column structure, the latter half casing surface of casing (010) is arc column structure.
3. The combined three-phase common-body electronic current-voltage transformer of claim 1, wherein: the current coil shielding cylinder (040) hermetically shields an output signal of a secondary winding formed by the current coil (050) inside the current coil shielding cylinder, and a framework of a winding coil of the current coil shielding cylinder (040) is a frame body made of a non-magnetic material.
4. The combined three-phase common-body electronic current-voltage transformer of claim 1, wherein: the shielding cylinder (140) is a metal cylinder made of low-expansion coefficient aluminum alloy, so that a high-voltage electrode is formed, and the end part of the cylinder is of an arc-shaped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911402838.2A CN110875117A (en) | 2019-12-31 | 2019-12-31 | Combined three-phase integrated electronic current and voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911402838.2A CN110875117A (en) | 2019-12-31 | 2019-12-31 | Combined three-phase integrated electronic current and voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110875117A true CN110875117A (en) | 2020-03-10 |
Family
ID=69718384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911402838.2A Withdrawn CN110875117A (en) | 2019-12-31 | 2019-12-31 | Combined three-phase integrated electronic current and voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110875117A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112636230A (en) * | 2020-12-07 | 2021-04-09 | 河南平高电气股份有限公司 | Transition bus for GIS and GIS |
| CN113871177A (en) * | 2021-08-25 | 2021-12-31 | 河南平高电气股份有限公司 | GIS and external current transformer |
| CN113871176A (en) * | 2021-08-25 | 2021-12-31 | 河南平高电气股份有限公司 | External current transformer and GIS |
-
2019
- 2019-12-31 CN CN201911402838.2A patent/CN110875117A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112636230A (en) * | 2020-12-07 | 2021-04-09 | 河南平高电气股份有限公司 | Transition bus for GIS and GIS |
| CN113871177A (en) * | 2021-08-25 | 2021-12-31 | 河南平高电气股份有限公司 | GIS and external current transformer |
| CN113871176A (en) * | 2021-08-25 | 2021-12-31 | 河南平高电气股份有限公司 | External current transformer and GIS |
| CN113871176B (en) * | 2021-08-25 | 2024-04-05 | 河南平高电气股份有限公司 | External current transformer and GIS |
| CN113871177B (en) * | 2021-08-25 | 2024-04-09 | 河南平高电气股份有限公司 | GIS and external current transformer |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20200310 |