Plug-in input and hv installation with plug-in input

FIELD: electrical engineering.

SUBSTANCE: plug-in HV input (D) serves for connection of a current lead to the HV installation component (T) filled with an insulating medium and encapsulated inside a metal housing. The input is designed to be rotationally symmetrical relative to axis (A) and contains a centrally position current lead (10), a field control device and (enveloping the current lead) an insulator (20) with a tapering section (21) that, after the input (D) insertion into the plug-in part (60) covering the component (T) in a manner impermeable for the insulating medium, dielectrically strengthens the gap (F) positioned between the plug-in part (60) insulating bushing (64) and the insulator (21) tapering section. The field control device is designed as a capacitor roll (40), the capacitor roll (40) containing capacitor armatures (41) electrically insulated from each other, retained (in the radial direction) by an insulating film (42) with a gap relative to each other and embedded into the insulator (20) by way of the capacitor roll (40) sealing in consolidated polymer mass; the capacitor armatures (41) pass through the installation flange (30) towards the insulator (20) tapering section (21).

EFFECT: creation of an input of comparatively simple and robust design, applicable for efficient control of active electric field in case of the input operating at very high operational voltages.

13 cl, 3 dwg

 

The technical field to which the invention relates.

The present invention relates to a plug-in input for connection of external conductors to a component of a high-voltage installation, filled with liquid or gaseous insulating material and enclosed in a metal case, according to the restrictive part of paragraph 1 of the claims. The invention relates to a high-voltage installation component, filled with liquid or gaseous insulating medium and enclosed in a metal case, and plug the input according to claim 1 of the formula.

"Jack input connects the internal conductors located in the component and insulated liquid or gaseous insulating medium from the metal housing, with an outer conductors, insulated, typically ambient air, which, however, can also be isolated by other insulating means, for example, solid, oil or SF6to be part of a high-voltage cable, cable end fitting or cable clutch or a stand-alone gas distribution device.

The level of technology

Plug the inputs of the type specified above is described, for example, in GB 689560, DE 102007022641 A1 and published by the company Pfisterer Kontaktsysteme GmbH & Co. KG the work of Th. Klein and others, "A New Separable 170 kV Outdoor Bushing System Creates a Multipurpose Transformer of Switchgear" in 2006. Op the sledge plug-in entries contain, respectively, connector part, which when mounting the transformer on site Assembly is inserted in the return connector part located at the transformer ensuring impermeability for insulating means. This significantly simplifies transportation and maintenance for transformer.

When inserted into the input between the insulating sleeve return the plug part and socket part of the input is made, usually in the form of a plug, a gap that the transformer or input is subjected to a strong electric field and which can be dielektricheskii stabilized, for example, by means of an insulating oil (GB 689560), the device control field, which is embedded in the input, or by applying limiting the clearance of the elastomer.

Description of the invention

The basis of the invention in the form as it is described in patent formula, based on the task of creating a plug-in input of the type specified above, characterized by a simple and compact design and is suitable at the same time effectively manage current when the input field even at very high operating voltages.

According to the present invention proposed a plug-in input for connection of external conductors to a component of a high-voltage installation, filled with liquid or gaseous isolation the first means and the prisoner in the metal case, when this input contains coaxially with the location of the missing axis conductors with plug-in contact and a connecting element for the outer conductors, and attached to the conductors insulator fixed to the insulator mounting flange and covering the conductors of the control device are formed after the application of high voltage electric field. The insulator has a tapering section, which, after insertion of the input connector part, the closing component of the high-voltage installation impervious to the insulating means, dielektricheskii stabilizes the gap formed between the insulating sleeve of the plug part and tapering section of the insulator. The device control field is made in the form of a roll capacitor. A roll capacitor contains electrically isolated from each other plates, which in the radial direction are held by insulating film with a gap between itself and embedded in the insulator by sealing roll capacitor in the hardened polymer mass. Capacitor plates pass through the mounting flange on the tapered section of the prison.

As in the input according to the invention in an insulator is embedded a roll capacitor as a device management field, while the insulator is simultaneously mounting flange, substantially in Rosetta manufacturing input, which is characterized by a simple and compact design. In the manufacture of the roll capacitor insulation film wrap is made with an appropriate step size of the capacitor plates in the relevant provisions. This ensures reliable and very accurate control of the electric field present during the operation of high voltage installations between the conductors and the mounting flange, metal housing component. The stepped arrangement of the plates can be easily achieved during manufacture as in the outer section located on one side of the mounting flange and containing a coupling element for the outer conductors, and the inner section located on the other side of the mounting flange and is intended for the component and, therefore, for clearance. So simple technological way hesitant special management tasks in the field relating to each of the two sites, and gap. Therefore, the input according to the invention, despite its simple and compact implementation, provides effective control or homogenization of the electric field acting at the high-voltage installation on both sides of the mounting flange and inside of the gap, and at very high operating voltage is provided.

The surface of the tapering section of the insulator, limiting the gap may be formed of insulation held on the roll of the capacitor and which is providepulmonary performed preferably elastomer. According to a preferred variant of the runtime plug-in input for the proper location providepulmonary isolation insulator it covers the rear protrusion formed on the roll capacitor.

Above the bounding surface of the gap can be made in the form of a cone and then it will taper conically. However, it can shrink and tulpenwiese. In this case, it narrows at facing the plug contact area significantly larger than facing away from the plug contact area on which it is optionally placed in the appropriate area of the bounding surface of the gap formed by the insulating sleeve of the plug part.

On the outer surface of the insulator can be positioned screen, passing in the radial direction from the mounting flange to the coupling element of the current-conducting wire.

To prevent deterioration of the electrical properties of the control field of the roll capacitor in the hardened polymer mass may contain a filler, forming a diffusion barrier for penetration were the and water. Suitable filler may contain inorganic powder, for example, quartz flour. As an alternative or Supplement the screen can also be installed on the floor of the prison, acting as a diffusion barrier.

To achieve a suitable gradation of the capacitor plates and, therefore, uniform distribution of the electric field inside the gap is addressed to the plug contact ends of the capacitor plates can be placed in the envelope surface corresponding to the contour of the gap.

Also part of the invention includes Gass filled with liquid or gaseous insulating medium component and the above plug input in which the input is inserted into the connector part, the closing component of the high-voltage installation impervious to insulation products containing insulating sleeve and is made in the form of the control field.

According to a variant implementation of this high-voltage installation on an insulating sleeve plug part can be located with a high voltage potential of the control electrode. As an alternative or Supplement the insulating sleeve may include managing field insulation material.

Limiting the gap surface of the insulating sleeve can be arr is implemented providepulmonary insulation, made preferably of elastomer.

Brief description of drawings

Below the invention is explained more by using the drawings, which shows:

figure 1 is a view made along the axis of the cross section for the version of the runtime plug-in input according to the invention when it is inserted in made in the form of the transformer high-voltage component installation;

figure 2 - side view of the plug on the input in figure 1 after its insertion into the transformer, and in section along the axis is shown formed at the insertion of the plug-in connection;

figure 3 is depicted with a bordering area connectors input in figure 2, to increase.

Ways of carrying out the invention

In all the figures the same elements are denoted by the same positions. Enter D, depicted in figure 1, 2 and located along the axis And contains coaxially with the location of the following items:

- located on the axis And the conductors 10, the lower end of which contains made in the form of a pin plug contact 11, and the upper end of the molded coupling element 12 to connect to external high-voltage conductors,

- made in the form of bodies of rotation of the insulator 20, containing fixed on the outer surface of the conductors 10 hard roll 40 of the capacitor and providepulmonary insulation 24, fixed on the end surface of the roll 40 con is instore,

- mounting flange 20 mounted on the outer surface of the insulator 20,

screen 50, consisting of a hydrophobic polymer, usually made of silicone or rubber-based copolymer of ethylene, propylene and diene monomer (EPDM), and installed as protection from weather conditions, contamination and/or radiation, as a rule, in the area of the outer surface of the insulator 20, which is located radially from the mounting flange 30 to the electrical connecting element 12.

The insulator 20 has a lower tapered section 21 and the adjacent section 22, is made mainly of cylindrical form. Section 22 passes through the mounting flange 30 located on the atmospheric air of the connecting element 12, the section 21 is positioned under the mounting flange 30 between it and the plug contact 11. A roll 40 of the capacitor embedded in the insulator 20 and contains electrically isolated from each other plates 41 of the capacitor, which in the radial direction are maintained with a gap between them through the insulating film 42, usually consisting of paper and/or plastic. The length of the plates of a capacitor 41 in the direction to the connecting element 12 to the ambient air and in the direction of the plug contact 11 is steadily decreases with increasing radial distance from the conductors 10. The power is oodama plates 41 of the capacitor, wrapped in foil 42 or drawn on it printed, and, in particular, addressed to the plug-in contact 11, the ends are recessed in the cured polymer matrix 23.

The hardened polymer mass 23 contains a polymer with a filler or without it, usually on the basis of epoxy resin. If necessary, the insulating material 23 may further comprise a powdered filler, for example, on the basis of quartz. Manufacturer of roll 40 of the capacitor or the input is simplified, if the insulating film 42 and, if necessary, also the sheath 41 of the condenser contain holes of the appropriate size. When the impregnation of the roll capacitor, pre-fabricated by winding insulating film 42 and the placement of the plates 42 of the capacitor, not the hardened polymer by weight of the filler particles may then easily pass through these openings.

A roll capacitor 40 serves to control the electric field produced by the input D between the conductors 10 in this case, a high voltage potential and a mounting flange 30 with the ground potential.

Tapering outer surface 21 of the insulator formed providepulmonary insulation 24 held on the front side of the roll 40 of the capacitor. Preferably this insulation contains an elastomer, for example, on the basis of EPDM or is Elicona. It is located on the bottom side of the mounting flange 30 to the plug-in contact 11. It put on a roll 40 of the capacitor only when the mounting flange 30 fixed to the roll 40 to condenser clip, or by glue. In this case, technologically expedient to form the insulation 24 together with the screen 50 oblikas roll 40 of the capacitor.

In figure 1 you can see that the input D can move down a-axis and inserted into a socket portion 60 of the transformer T. the Transformer T includes a metal casing 62 ground potential, filled with liquid or gaseous insulating means 61, in particular, the insulating oil. Conductors 63 of the transformer T connected with a not shown coil high voltage and is also located at the axis And its upper end is held by an insulating sleeve 64 plug part 60 and contains made in the form of a sleeve plug contact 65. An insulating sleeve 64 holding the conductors 63 and centering plug contact 65 on the axis And fixed tightly to the insulation means on the part of the body 62 made in the form of flange lugs and tapers along the axis And from the attachment continuously down to the inner part of the transformer So located On the inside of the transformer, the lower end of the insulating sleeve 64 are held the plug contact 65 and operated is a first electrode 66, connected to the conductors 63, with the possibility of electrical conductivity. Facing the inside surface of the insulating sleeve 64 has basically the same circuit as drawn to the outside surface of the tapered section 21 of the insulator.

As shown in figure 2, when inserted into the input D is made in the form of a sleeve connector part 60 between the facing to the axis And the inner surface of the insulating sleeve 64 and facing away from the axis And the surface of the tapered section 21 of the insulator, a gap F. When inserted into the plug contacts 11 and 65 come between an engaged and this creates an electrical connection between the two conductors 10 and 63. Then use bolts not shown produce the fastening of the mounting flange 30 on the metal case 62. The insulation 24 are pressed to the inner surface of the insulating sleeve 64 and elastically deform, resulting in dielektricheskii hardened gap F.

In the manufacture of the roll 40 of the capacitor can be ensured by placing performed along the length of the stepped plates 41 of the capacitor in the relevant provisions of the very high accuracy of control by the electric field present between the conductors 10 and the mounting flange 30, and the metal case 62. Thus, we achieve a finely adjustable homogenization of the electric field as in the outer phase is, lying above the mounting flange 30 using air as an insulating means, and the inner area below the mounting flange 30 by using the insulating means of the transformer T, ie, in particular, insulating oil, and, consequently, also in the gap F. Thus easily solved technologically specific management tasks field on each of the two sites, and in the gap. As shown, in the outer area is used as an insulating means, usually air, but may be other insulating means, for example, termination butter in a stand-alone gas distribution device - insulating gas, as a rule, SF6.

Instead filled with an insulating oil of the transformer T. Gass may also contain a component, for example, the device enable, switching equipment in a metal casing filled with an insulating gas, in particular, SF6.

In high-voltage installation that contains the input D is achieved a particularly accurate control of the electric field at the site of the insulating sleeve 64 and, in particular, in the gap And in that case, when the plug part 60 is made in the form of field control. It can be provided with a control electrode 66 provided in the installation to the Vysokov ltname potential, or by applying the control field of the material in the insulating sleeve 64 or the result of the joint application of the control electrode 66 and the control field insulating material in an insulating sleeve.

As is evident from figure 3, along with or instead providepulmonary insulation 24 in the insulating sleeve 64 can also be built provideproperty insulation 67. If such isolation, preferably made of elastomer based on silicone or EPDM, forms a bounding surface of the insulating sleeve 64, when inserted into the input D of the transformer T will be further enhanced dielectric strength of the gap.

Figure 3 also shows that converted to plug-in contact 11, the ends of the plates 41 of the condenser are arranged in the envelope surface of the N corresponding to the contour of the gap F. Thus, we achieve a particularly uniform management of the electric field in the gap F.

In addition, figure 3 shows that the roll 40 of the capacitor contains two sections 43, 44 located on the tapered section 21 of the insulator. Section 43 is cylindrical and provided with a ledge by a ring made of an axis And a stepped protrusion 45 on the section 44 having a small diameter and tapering downwards (in the direction of the plug contact 11). The insulation covers the back of the ledge 45, thereby increasing scale is their isolation 24 with the roll 40 of the capacitor. It is of great importance when inserted into the input D in the plug-in part, because from that moment on the insulation 24 will act counter to the direction of insertion large cutting efforts. The ledge takes part cutting efforts, thereby increasing adhesion of the insulation 24 with the roll 40 of the capacitor.

The list of items

10 conductors

11 plug-in contact

12 of the outer connection element

20 insulator

21, 22 parts of the insulator 20

23 the hardened polymeric material

24 isolation

30 mounting flange

40 a roll capacitor

41 capacitor plates

42 is an insulating film

43 the cylindrical section of the roll capacitor

44 tapering section of the roll capacitor

45 ledge

50 screen

60 connector part

61 isolation tool

62 metal housing

63 conductors

64 isolating sleeve

65 plug contact

66 control electrode

67 isolation

And the axis

D enter

F gap

H envelope surface

T transformer.

1. Plug high voltage input (D) for connection of external conductors to the component (T) of high-voltage installation, filled with liquid or gaseous insulating means (61) and concluded in the metal housing, and the input contains at axial location passing through the axis (A) Toko the wires (10) with plug-in contact (11) and the connecting element (12) to the outer conductors, attached to the conductors (10) insulator (20)fixed to the insulator (20) mounting flange (30) and covering the conductors (10), the control unit electric field generated upon application of high voltage, in which the insulator (20) includes a tapering section (21), which, after insertion of the input (D) in the connector part (60), the closing component (T) of high-voltage installation impervious to the insulating means, dielektricheskii increases the gap (F)located between the insulating sleeve (64) plug part (60) and a narrowing section (21) insulator, characterized in that the control device is a field in the form of roll (40) of the capacitor containing electrically isolated from each other plates (41) of the capacitor, which are held in the radial direction of the insulating film (42) with a gap between itself and embedded in the insulator (20) the incorporation of the roll (40) of the capacitor in the hardened polymer mass (23), and plates (41) of the capacitor pass through the mounting flange (30) on the tapering section of the insulator (20).

2. Enter according to claim 1, characterized in that the limiting gap (F) surface area (21) of the insulator formed providepulmonary insulation (24), held on the roll (40) of the capacitor.

3. Enter according to claim 2, characterized in that provideproperty insulation (24) made of elastomer the A.

4. Enter according to claim 2, characterized in that provideproperty insulation (24) covers the rear protrusion (45), formed on the roll (40) of the capacitor.

5. Enter according to claim 1, characterized in that on the outer surface of the insulator (20) is the screen (50), passing in the axial direction from the mounting flange (30) to the connecting element (12) of the conductors (10).

6. Enter according to claim 5, wherein the hardened polymer mass (23) contains a filler that serves as a diffusion barrier to penetrating from the outside of the water.

7. Enter according to claim 5, characterized in that the screen (50) is located on the floor of the insulator (20)that serves as a diffusion barrier to penetrating from the outside of the water.

8. Enter according to claim 1, characterized in that converted to plug-in contact (11) the ends of the plates (41) of the capacitor are located on the envelope surface (N)corresponding to the contour of the gap (F).

9. Gass component (T), filled with liquid or gaseous insulating means (61), and plug the input (D) according to any one of claims 1 to 8, is inserted in the connector part (60), the closing component (T) of high-voltage installation impervious to the insulating means and containing an insulating sleeve (64), characterized in that the plug part (60) is made in the form of the control field.

10. High-voltage installation according to claim 9, characterized in that the isolation in Ulke (64) is a control electrode (66) formed by the high-voltage potential.

11. High-voltage installation according to claim 9 or 10, characterized in that the insulating sleeve (64) comprises a control field insulation material.

12. High-voltage installation according to claim 9, characterized in that the limiting gap (F) the surface of the insulating sleeve (64) formed providepulmonary insulation (67).

13. High-voltage installation according to item 12, wherein provideproperty isolation (67) made of elastomer.



 

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