CN107369544B - GIS type self-boosting standard voltage transformer with electromagnetic shielding - Google Patents

Abstract

The embodiment of the application discloses a GIS type self-boosting standard voltage transformer with electromagnetic shielding, which comprises the following components: step-up test transformer, standard voltage transformer, tee bend connection structure, wire outlet sleeve pipe and equalizer ring, wherein: the tank body of the boosting test transformer and the tank body of the standard voltage transformer are respectively connected with the tee joint structure, and the outlet sleeve is respectively connected with the tee joint structure and the equalizing ring; the standard voltage transformer is internally provided with a standard voltage transformer component, the boosting test transformer is internally provided with a boosting test transformer component, and the standard voltage transformer component and the boosting test transformer component are respectively fixed in a tank body of the boosting test transformer and a tank body of the standard voltage transformer. Through carrying out packaging design with standard voltage transformer subassembly and boost test transformer subassembly, can prevent the magnetic leakage field inflow standard voltage transformer magnetic circuit of boost test transformer to the accuracy of self-elevating standard voltage transformer error data has been ensured.

Description

A GIS-type self-boosting standard voltage transformer with electromagnetic shielding

Technical field

This application relates to the technical field of voltage transformers, and in particular to a GIS-type self-boosting standard voltage transformer with electromagnetic shielding.

Background technique

The self-boosting standard voltage transformer is a special standard voltage transformer that combines the boost power supply and the standard voltage transformer into a whole, which reduces the number of equipment used and the number of wiring when measuring errors, and is easy to transport and carry. On-site operation. In view of the above advantages, self-boosting standard voltage transformers are increasingly used in the calibration/measurement of voltage transformers. At present, the error calibration/measurement of voltage transformers basically uses self-boosting standard voltage transformers as the calibration/measurement standard, which is widely used.

With the widespread use of self-boosting standard voltage transformers, self-boosting standard voltage transformers have also exposed problems in the equipment itself. Since the magnetic field generated by the booster in the traditional self-boosting standard voltage transformer has a great influence on the error of the standard voltage transformer, when using the self-boosting standard voltage transformer for error calibration, the calibration data may be inaccurate. phenomenon, reducing the accuracy of test data.

Contents of the invention

This application provides a GIS-type self-boosting standard voltage transformer with electromagnetic shielding to solve the problem that the magnetic field generated by the booster in traditional self-boosting standard voltage transformers has an excessive impact on the error data of the standard voltage transformer. .

A GIS-type self-boosting standard voltage transformer with electromagnetic shielding, including: a step-up test transformer, a standard voltage transformer, a three-way connection structure, an outlet bushing and a voltage equalizing ring, wherein: the step-up test transformer The tank body and the tank body of the standard voltage transformer are respectively connected to the three-way connection structure, and the outlet bushing is respectively connected to the three-way connection structure and the voltage equalizing ring; the standard voltage transformer is provided with a Standard voltage transformer assembly, the step-up test transformer is provided with a step-up test transformer assembly inside, the standard voltage transformer assembly and the step-up test transformer assembly are respectively fixed on the tank and the body of the step-up test transformer. inside the tank of the above standard voltage transformer.

Optionally, the standard voltage transformer component includes an R-shaped iron core, a secondary winding and a primary winding. The R-shaped iron core, secondary winding and primary winding constitute a standard voltage transformer wire package. The secondary winding Wound on the surface of the R-shaped iron core, the primary winding is wound on the surface of the secondary winding; the step-up test transformer assembly includes a laminated iron core, an input winding, an output winding, and a compensation winding. The input winding , the output winding, the compensation winding and the laminated core constitute the step-up test transformer wire package, the input winding is wound on the laminated core, the compensation winding is wound on the surface of the input winding, the output The winding is wound on the surface of the compensation winding; the standard voltage transformer assembly and the boost test transformer assembly also include: shielding film, shielding cover, pillar shielding cover, iron core short side magnetic shielding plate and iron core The long side magnetic shielding plate, the last turn of the primary winding is connected to the shielding film, the last turn of the output winding is connected to the shielding film, the shielding film is a copper foil shielding film, the pillar The shielding cover is arranged on the shielding cover, and the magnetic shielding plate on the short side of the iron core and the magnetic shielding plate on the long side of the iron core are respectively fixed on the short side inner side and the long side inner side of the R-shaped iron core.

Optionally, the three-way connection structure is provided with a step-up test transformer connection flange, a standard voltage transformer connection flange and an outlet bushing connection flange. The tank body of the step-up test transformer, the standard voltage transformer connection flange The tank body of the device and the outlet bushing are respectively connected to the tee connection structure through the step-up test transformer connecting flange, the standard voltage transformer connecting flange and the outlet bushing connecting flange, The voltage equalizing ring is connected to the outlet end of the outlet bushing.

Optionally, the three-way connection structure is provided with a three-way conductive rod connecting pipe, and the three-way conductive rod connecting pipe is connected to the corresponding pillar shield of the step-up test transformer and the standard voltage transformer. The pillar shield is connected to the outlet end of the outlet bushing, and is respectively provided with a connection port for the high-voltage outlet end of the step-up transformer, a connection port for the high-voltage outlet end of the standard voltage transformer, and a connection port for the high-voltage output end of the outlet bushing. The three The through-hole conductive rod connecting tube is designed in one piece.

Optionally, the step-up test transformer and the standard voltage transformer are connected to the same air chamber, the air chamber is filled with SF ₆ insulating gas, and the air pressure in the air chamber is 0.3-0.4Mpa.

Optionally, an insulating film is provided between the inner winding layers of the standard voltage transformer wire package and the step-up test transformer wire package.

Optionally, the magnetic shielding plate on the short side of the iron core and the magnetic shielding plate on the long side of the iron core are alloy magnetic shielding plates with a thickness of 10-12mm.

Optionally, the outlet end of the output winding and the outlet end of the primary winding are high-voltage outlet ends.

Optionally, the magnetic shielding plate on the short side of the iron core is perpendicular to the widthwise extension plane of the winding, and the magnetic shielding plate on the long side of the iron core is perpendicular to the longitudinal extension plane of the winding.

Optionally, the casing of the step-up test transformer assembly, the casing of the standard voltage transformer assembly and the casing of the tee connection structure are all made of Q235 material.

It can be seen from the above solution that the GIS-type self-boosting standard voltage transformer with electromagnetic shielding provided by the embodiment of the present application includes: a boost test transformer, a standard voltage transformer, a three-way connection structure, an outlet bushing and a voltage equalizer. ring, in which: the tank of the boost test transformer and the tank of the standard voltage transformer are connected to the three-way connection structure respectively, and the outlet bushings are respectively connected to the three-way connection structure and the voltage equalizing ring; the standard voltage transformer is equipped with a standard internal A voltage transformer assembly is provided inside the step-up test transformer. The standard voltage transformer assembly and the step-up test transformer assembly are respectively fixed in the tank body of the step-up test transformer and the tank body of the standard voltage transformer. By packaging the standard voltage transformer component and the step-up test transformer component, the leakage magnetic field of the step-up test transformer can be prevented from flowing into the standard voltage transformer magnetic circuit, thereby ensuring the accuracy of the error data of the self-boost standard voltage transformer.

Description of the drawings

In order to explain the technical solution of the present application more clearly, the drawings required to be used in the embodiments will be briefly introduced below. It is obvious that for those of ordinary skill in the art, without exerting any creative effort, Other drawings can also be obtained from these drawings.

Figure 1 is a schematic structural diagram of an embodiment of a GIS self-boosting standard voltage transformer with electromagnetic shielding provided by this application;

Figure 2 is a schematic structural diagram of an embodiment of a standard voltage transformer assembly provided by this application;

Figure 3 is a schematic structural diagram of an embodiment of the three-way connection structure provided by this application;

Figure 4 is a schematic structural diagram of an embodiment of the three-way conductive rod connecting pipe provided by this application;

Figure 5 is a schematic structural diagram of an embodiment of the outlet bushing provided by this application;

In Figure 1-5, the symbols are: 1-boost test transformer, 2-standard voltage transformer, 3-three-way connection structure, 4-outlet bushing, 5-voltage equalizing ring, 6-R type iron core, 7-Secondary winding, 8-Primary winding, 9-Shielding film, 10-Shielding cover, 11-Pillar shielding cover, 12-Iron core short side magnetic shielding plate, 13-Iron core long side magnetic shielding plate, 14 -Step-up test transformer connection flange, 15-standard voltage transformer connection flange, 16-outlet bushing connection flange, 17-step-up transformer high-voltage outlet connection port, 18-standard voltage transformer high-voltage outlet connection Port, 19-outlet bushing high-voltage input end connection port, 20-outlet bushing high-voltage input end, 21-outlet bushing high-voltage output end.

Detailed ways

Refer to Figure 1, which is a schematic structural diagram of an embodiment of the GIS self-boosting standard voltage transformer with electromagnetic shielding provided by the present application. As shown in Figure 1, the GIS self-boosting standard voltage transformer with electromagnetic shielding It includes: step-up test transformer 1, standard voltage transformer 2, tee connection structure 3, outlet bushing 4 and voltage equalizing ring 5, among which: the tank body of the step-up test transformer 1 and the standard voltage transformer 2 The tanks are respectively connected to the three-way connection structure 3, the boost test transformer 1 and the standard voltage transformer 2 are connected to the same air chamber, and the air chamber is filled with SF ₆ insulating gas. The indoor air pressure is 0.3-0.4Mpa. The outlet bushing 4 is respectively connected to the tee connection structure 3 and the pressure equalizing ring 5. As shown in Figure 5, the outlet bushing 4 includes a high-voltage input end 20 of the outlet bushing and a high-voltage output end 21 of the outlet bushing. The standard voltage transformer 2 is provided with a standard voltage transformer component, and the step-up test transformer 1 is provided with a step-up test transformer component. The standard voltage transformer component and the step-up test transformer component are respectively fixed on Inside the tank of the step-up test transformer 1 and the tank of the standard voltage transformer 2.

As shown in Figure 2, the standard voltage transformer 2 is equipped with a standard voltage transformer component inside. The standard voltage transformer component includes an R-shaped iron core 6, a secondary winding 7, a primary winding 8, a shielding film 9, a Cover plate 10, pillar shield 11, iron core short side magnetic shielding plate 12 and iron core long side magnetic shielding plate 13. The secondary winding 7 is wound on the surface of the R-shaped core 6, the primary winding 8 is wound on the surface of the secondary winding 7, the last turn of the primary winding 8 is connected to the shielding film 9, and the shielding The cover 10 is arranged outside the shielding film 9, the pillar shielding cover 11 is arranged on the shielding cover 10, the magnetic shielding plate 12 on the short side of the iron core and the magnetic shielding plate 13 on the long side of the iron core are respectively fixed. On the inside of the short side and the inside of the long side of the R-shaped iron core 6 . The R-shaped core 6 includes two short sides and two long sides, so there are two sets of magnetic shielding plates 12 on the short side of the core and magnetic shielding plates 13 on the long side of the core. The magnetic shielding plate 12 on the short side of the iron core of the standard voltage transformer assembly is perpendicular to the radial extension plane of the winding, and the magnetic shielding plate 13 on the long side of the iron core is perpendicular to the longitudinal extension plane of the winding. The magnetic shielding plate 12 on the short side of the iron core and the magnetic shielding plate 13 on the long side of the iron core are made of alloy, with a thickness of 10-12mm, a smooth surface, and chamfering on all four sides, which can effectively reduce the magnetic leakage of the wire package. the impact produced.

The step-up test transformer 1 is provided with a step-up test transformer component inside. The iron core of the transformer component is a laminated iron core. The step-up test transformer component includes an input winding, an output winding, and a compensation winding. The input winding , the output winding, the compensation winding and the laminated core constitute the step-up test transformer wire package, the input winding is wound on the laminated core, the compensation winding is wound on the surface of the input winding, the output The winding is wound on the surface of the compensation winding. The step-up test transformer assembly and the standard voltage transformer assembly also include: a shielding film, a shielding cover, a pillar shielding cover, a magnetic shielding plate on the short side of the iron core and a magnetic shielding plate on the long side of the iron core. The output The last turn of the winding is connected to the shielding film (9), and the connection structure of the shielding film, shielding cover, pillar shielding cover, magnetic shielding plate on the short side of the core and the magnetic shielding plate on the long side of the core is with the The internal structural connections of standard voltage transformer components are the same and will not be described again here.

An insulating film is provided between the inner winding layers of the standard voltage transformer assembly and the step-up test transformer iron assembly. The outlet end of the output winding inside the core assembly of the step-up test transformer is a high-voltage outlet end, and the outlet end of the primary winding 8 inside the standard voltage transformer assembly is a high-voltage outlet end. The shell of the step-up test transformer assembly, the shell of the standard voltage transformer assembly and the tee connection structure are all made of Q235 material. The material has good magnetic permeability and can effectively prevent the leakage magnetic field of the step-up test transformer from penetrating. The magnetic circuit of the standard voltage transformer flows through the outer shell, thereby ensuring the accuracy of the error data of the standard voltage transformer. The high-voltage outlet ends of the step-up test transformer assembly and the standard voltage transformer assembly are equipped with pillar shields. The pillar shields are made of aluminum alloy, with a hollow interior and smooth and burr-free inner and outer surfaces.

As shown in Figure 3, the tee connection structure 3 is provided with a step-up test transformer connection flange 14, a standard voltage transformer connection flange 15 and an outlet bushing connection flange 16. The outlet of the step-up test transformer 1 end, the outlet end of the standard voltage transformer 2 and the inlet end of the outlet bushing 4 respectively pass through the boost test transformer connecting flange 14, the standard voltage transformer connecting flange 15 and the outlet line. The bushing connection flange 16 is connected to the three-way connection structure 3 , and the pressure equalizing ring 5 is connected to the outlet end of the outlet bushing 4 .

As shown in Figure 4, the three-way connection structure 3 is provided with a three-way conductive rod connecting pipe, and the three-way conductive rod connecting pipe corresponds to the boost test transformer connecting flange 14 and the standard voltage transformer. The connecting flange 15 and the outlet bushing connecting flange 16 are respectively provided with a connection port 17 for the high-voltage outlet end of the step-up transformer, a connection port 18 for the high-voltage outlet end of the standard voltage transformer, and a connection port 19 for the high-voltage output end of the outlet bushing. , the three-way port conductive rod connecting pipe is designed in one piece.

It can be seen from the above embodiments that the GIS-type self-boosting standard voltage transformer with electromagnetic shielding provided by the embodiment of the present application includes: The GIS-type self-boosting standard voltage transformer with electromagnetic shielding includes: Voltage test transformer 1, standard voltage transformer 2, tee connection structure 3, outlet bushing 4 and voltage equalizing ring 5, among which: the tank body of the step-up test transformer 1 and the tank body of the standard voltage transformer 2 They are respectively connected to the three-way connection structure 3. The step-up test transformer 1 and the standard voltage transformer 2 are connected to the same air chamber. The air chamber is filled with SF ₆ insulating gas. The air pressure in the air chamber is 0.3-0.4Mpa. The outlet bushing 4 is connected to the tee connection structure 3 and the voltage equalizing ring 5 respectively. The standard voltage transformer 2 is equipped with a standard voltage transformer component inside, and the voltage boost test transformer 1 is equipped with a voltage boost test inside. Transformer assembly, the standard voltage transformer assembly and the step-up test transformer assembly are respectively fixed in the tank body of the step-up test transformer 1 and the tank body of the standard voltage transformer 2. The shielding cover and magnetic shielding plate provided inside the step-up test transformer assembly and the standard voltage transformer assembly can uniform the electric field inside the air chamber and transform the extremely uneven reactance and slightly uneven power plant into a uniform electric field. It can effectively prevent the occurrence of discharge and improve the safety of the test. The outer shells of the boost test transformer 1 and the standard voltage transformer 2 are made of Q235 material, which can effectively prevent the leakage magnetic field of the boost test transformer from penetrating the shell and flowing into the standard voltage transformer's own magnetic circuit, thus ensuring the accuracy of the error data of the standard voltage transformer.

The above-described embodiments of the present application do not limit the scope of protection of the present application.

Claims (9)

1. GIS formula self-boost standard voltage transformer with electromagnetic shielding, characterized by comprising: step-up test transformer (1), standard voltage transformer (2), tee bend connection structure (3), outlet sleeve pipe (4) and equalizer ring (5), wherein: the tank body of the step-up test transformer (1) and the tank body of the standard voltage transformer (2) are respectively connected with the three-way connecting structure (3), and the wire outlet sleeve (4) is respectively connected with the three-way connecting structure (3) and the equalizing ring (5);

the standard voltage transformer (2) is internally provided with a standard voltage transformer component, the boosting test transformer (1) is internally provided with a boosting test transformer component, and the standard voltage transformer component and the boosting test transformer component are respectively fixed in a tank body of the boosting test transformer (1) and a tank body of the standard voltage transformer (2);

the standard voltage transformer assembly comprises an R-shaped iron core (6), a secondary winding (7) and a primary winding (8), wherein the R-shaped iron core (6), the secondary winding (7) and the primary winding (8) form a standard voltage transformer coil, the secondary winding (7) is wound on the surface of the R-shaped iron core (6), and the primary winding (8) is wound on the surface of the secondary winding (7);

the boosting test transformer assembly comprises a laminated iron core, an input winding, an output winding and a compensation winding, wherein the input winding, the output winding, the compensation winding and the laminated iron core form a boosting test transformer coil, the input winding is wound on the laminated iron core, the compensation winding is wound on the surface of the input winding, and the output winding is wound on the surface of the compensation winding;

the standard voltage transformer assembly and the step-up test transformer assembly each further comprise: the novel iron core magnetic shielding device comprises a shielding film (9), a shielding cover (10), a supporting column shielding cover (11), an iron core short side magnetic shielding plate (12) and an iron core long side magnetic shielding plate (13), wherein the last turn of a primary winding (8) is connected with the shielding film (9), the last turn of an output winding is connected with the shielding film (9), the shielding film (9) is a copper foil shielding film, the supporting column shielding cover (11) is arranged on the shielding cover (10), and the iron core short side magnetic shielding plate (12) and the iron core long side magnetic shielding plate (13) are respectively and fixedly arranged on the short side inner side and the long side inner side of an R-shaped iron core (6).

2. The GIS type self-boosting standard voltage transformer with electromagnetic shielding according to claim 1, wherein the three-way connecting structure (3) is provided with a boosting test transformer connecting flange (14), a standard voltage transformer connecting flange (15) and an outgoing line sleeve connecting flange (16), the tank body of the boosting test transformer (1), the tank body of the standard voltage transformer (2) and the outgoing line sleeve (4) are respectively connected with the three-way connecting structure (3) through the boosting test transformer connecting flange (14), the standard voltage transformer connecting flange (15) and the outgoing line sleeve connecting flange (16), and the equalizing ring (5) is connected with an outgoing line end of the outgoing line sleeve (4).

3. The GIS type self-boosting standard voltage transformer with electromagnetic shielding according to claim 2, wherein a three-way connecting structure (3) is internally provided with a three-way conducting rod connecting pipe, the three-way conducting rod connecting pipe is connected with a corresponding pillar shielding cover of the boosting test transformer, the pillar shielding cover of the standard voltage transformer and the outgoing line sleeve outgoing line end, and is respectively provided with a high-voltage outgoing line end connecting port (17) of the boosting transformer and a high-voltage of the standard voltage transformer

The outlet end is connected with a port (18) and the outlet sleeve high-voltage output end is connected with a port (19), and the three-way conducting rod connecting pipe is integrally formed.

4. A GIS-type self-boosting standard voltage transformer with electromagnetic shielding according to any one of claims 1-3, wherein the boosting test transformer (1) and the standard voltage transformer (2) are communicated with the same air chamber, the air chamber is filled with SF6 insulating gas, and the air pressure in the air chamber is 0.3-0.4Mpa.

5. The electromagnetic shielding GIS type self-boosting standard voltage transformer according to claim 4, wherein insulating films are arranged between the standard voltage transformer coil and the inner winding layers of the boosting test transformer coil.

6. The GIS-type self-boosting standard voltage transformer with electromagnetic shielding according to claim 5, wherein the iron core short side magnetic shielding plate (12) and the iron core long side magnetic shielding plate (13) are alloy magnetic shielding plates with a thickness of 10-12mm.

7. The GIS-type self-boosting standard voltage transformer with electromagnetic shielding according to claim 1, characterized in that the outgoing line end of the output winding and the outgoing line end of the primary winding (8) are high-voltage outgoing line ends.

8. The GIS-type self-boosting standard voltage transformer with electromagnetic shielding according to claim 7, wherein the core short side magnetic shielding plate (12) is perpendicular to the radial extension plane of the winding, and the core long side magnetic shielding plate (13) is perpendicular to the longitudinal extension plane of the winding.

9. The GIS-type self-boosting standard voltage transformer with electromagnetic shielding according to claim 8, wherein the shell of the boosting test transformer assembly, the shell of the standard voltage transformer assembly and the shell of the three-way connection structure are all made of Q235.