CN105490196A - A compact box-type substation - Google Patents

Abstract

The invention provides a compact box-type transformer substation which comprises two transformers, high-voltage equipment, low-voltage equipment and a wire inlet cable, wherein the transformers are arranged at intervals, the high-voltage equipment is positioned right above the transformers, the low-voltage equipment is positioned on the side wall of the low-voltage side of the transformers, the left side and the right side of the high-voltage equipment are respectively provided with a left wire inlet sleeve and a right wire inlet sleeve which are connected with the wire inlet cable, the high-voltage side of the transformers is provided with fully-insulated high-voltage wire outlet sleeves, the back of the high-voltage equipment is provided with a wire outlet sleeve, the high-voltage wire outlet sleeves are connected with the wire outlet sleeves, the low-voltage side of the transformers is provided with low-voltage wire outlet sleeves consisting of conductive rods and wiring terminals. According to the invention, the high-voltage equipment, the low-voltage equipment and the transformer are arranged in one interval, and the two transformers are integrated into a whole, so that the installation space is reduced, and the overall dimension and the occupied area of the box transformer substation are greatly reduced.

Description

A compact box-type substation

technical field

The invention relates to the technical field of box-type substations, in particular to a compact box-type substation.

Background technique

Box-type substation is a kind of high-voltage switchgear, distribution transformer and low-voltage power distribution device, which are prefabricated indoor and outdoor compact power distribution equipment arranged in one according to a certain wiring scheme. The main components of the box-type substation are transformers, high-voltage switchgear and control equipment, low-voltage switchgear and control equipment, corresponding internal connecting lines and auxiliary equipment.

The box-type substation used for railway signal and communication requires two power supplies, which can ensure that one power supply fails to switch to the other and ensure smooth communication in the railway department. The power load of this system is small, and the transformer used does not exceed 200kVA, but two transformers are required to transmit power from different lines. Therefore, the box-type substation requires two sets of high-voltage cabinets, low-voltage cabinets and transformers, which are relatively large.

The commonly used layout methods of box-type substations are "product" and "mesh", which are separated by partitions, that is, high-voltage equipment, low-voltage equipment and transformers are placed in a separate compartment, and are divided into high-voltage equipment according to the arrangement position: The high-voltage and low-voltage equipment are respectively placed on the high and low-voltage side of the transformer, or the high-voltage equipment and the low-voltage equipment are not completely corresponding to the plane side. The high-voltage bushing of the transformer is composed of conductive rods and terminals, and the live electricity is exposed outside. It is required that the transformer room in the box-type transformer should have enough space to meet its safety distance, resulting in an increase in the overall size of the box-type transformer. High-voltage equipment, low-voltage equipment, and transformers are placed in separate compartments. In order to ensure that the door panels of high-voltage and low-voltage equipment can be opened, the enclosure of the box transformer needs to be enlarged in size; copper bars or cables are required to connect high-voltage equipment, low-voltage equipment, and transformers, and the use of busbar materials is relatively low. many.

Patent No. CN200720172922.6 discloses that high-voltage equipment and low-voltage equipment are mounted on the oil tank wall of a transformer, and the entire high-voltage equipment, low-voltage equipment and transformer are located in a closed box. The design still adopts the common layout method of "product" and "me" shapes. Although the partitions are reduced and the high and low voltage equipment and transformers are packed in an airtight box, it still occupies the plane space and is not enough in size. compact. In addition, if the product is used in the railway project mentioned in the present invention, the volume will increase even more because the quantity of all electric equipment is doubled.

Contents of the invention

In order to solve the above technical problems, the technical solution provided by the present invention is: a compact box-type substation, including a transformer with two intervals inside, a high-voltage device located directly above the transformer, and a side wall located on the low-voltage side of the transformer. The low-voltage equipment and incoming cables on the high-voltage equipment are equipped with an air chamber, and the left and right sides of the air chamber are respectively equipped with a left incoming line sleeve and a right incoming line sleeve to connect with the incoming line cable. , the transformer is provided with a casing, and the high voltage side of the transformer casing is equipped with a fully insulated high-voltage outlet bushing, and the back of the high-voltage equipment has an outlet bushing, and the high-voltage outlet bushing is connected to the outlet bushing , the upper part of the low-voltage side of the transformer housing is equipped with a low-voltage outlet bushing composed of a conductive rod and a terminal, and the low-voltage outlet bushing extends into the low-voltage equipment to electrically connect with low-voltage components.

Wherein, two outgoing line load switches with fuses and grounding are arranged in the air chamber, and the two outgoing line load switches are independent from each other and connected with the outgoing line bushings respectively.

Wherein, the left inlet sleeve and the right inlet sleeve are equipped with European-style front plugs, and are connected to the incoming cables through the European-style front plugs.

Furthermore, the way of entering and exiting the line is side entry and bottom exit, and both the entry and exit lines adopt wall bushings.

Wherein, the high-voltage outlet bushing is connected to the outlet bushing through a cable accessory, wherein the cable accessory includes a T-shaped joint and a copper pipe.

Wherein, the transformer also includes a tap changer that provides a constant voltage for the transformer when the load changes, an oil temperature gauge for measuring the oil temperature in the transformer, and an oil level gauge for displaying the oil position in the transformer housing, The tap changer, the oil temperature gauge, and the oil level gauge are installed on the left side of the high-voltage outlet bushing respectively.

Wherein, a corrugated sheet capable of rapidly dissipating heat is installed at the lower part of the high-voltage outlet bushing on the high-voltage outlet side of the transformer housing.

Wherein, the low-voltage equipment includes a low-voltage box, a door panel that can be installed with low-voltage indicating and operating components, and a mounting plate that can be installed with low-voltage switch components. A plurality of bolts are welded at the front edge of the transformer housing. It is installed on the transformer housing through the bolts, and the lower part of the transformer housing is welded with a box-type fixing plate with an open top, and the installation plate is fixed on the box-type fixing plate.

Wherein, the mounting board is two metal plates welded side by side, and the components are mounted on the mounting board in a straight line from left to right.

Wherein, scale holes are arranged at the upper and lower positions of the side wall of the low-pressure box, and the scale holes are lined with dust-proof nets.

The advantages and beneficial effects of the present invention are: through the new layout of high-voltage equipment, low-voltage equipment, and transformers, all high-voltage and low-voltage equipment and transformers are located in a metal box, and there is no partition in the middle to block, and the reduction of partitions can be extremely The overall size of the box transformer is greatly reduced; the conventional cooling device is eliminated on the low-voltage side, and low-voltage components can be installed, saving the installation space of low-voltage equipment. All electrical components are directly installed on the side wall of the transformer, reducing the space occupied by low-voltage equipment , reducing the volume of low-voltage equipment, so that the volume of the box is smaller; the two transformers are integrated into one, reducing the installation space; the high-voltage outlet bushing is changed to a fully insulated type, which greatly reduces the distance between the high-voltage cabinet The connection size saves the space of the box change, and the appearance of the compact box change greatly saves electric energy and floor space.

Description of drawings

Fig. 1 is the layout drawing of box-type substation of the present invention;

Fig. 2 is a side view of the box-type substation of the present invention;

Fig. 3 is a structural representation of medium and high voltage equipment of the present invention;

Fig. 4 is a side view of medium and high voltage equipment of the present invention;

Fig. 5 is the side view of transformer among the present invention;

Fig. 6 is the back view of transformer among the present invention;

Fig. 7 is the front view of transformer among the present invention;

Fig. 8 is a front view of medium and low voltage equipment of the present invention;

Fig. 9 is a side view of the medium and low voltage equipment of the present invention;

Fig. 10 is a structural schematic diagram of the mounting plate of the medium and low voltage equipment of the present invention.

In the figure: 1. Left inlet bushing 2. Right inlet bushing 3. Air chamber 4. Outlet bushing 5. Transformer shell 6. Transformer 7. High voltage outlet bushing 8. Low voltage outlet bushing 9. Oil level Meter 10. Oil temperature gauge 11. Tap changer 12. Corrugated sheet 13. Box-type fixed plate 14. Bolt 15. Low-voltage box 16. Door plate 17. Mounting plate 18. Scale hole 19. High-voltage equipment 20. Low-voltage equipment 21 .European front plug 22. T-shaped connector 23. Copper pipe 24. Incoming cable

detailed description

The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, Figure 2, Figure 3, Figure 4, and Figure 5, a compact box-type substation includes a transformer 6 with two intervals inside, a high-voltage device 19 located directly above the transformer 6, and a Describe the low-voltage equipment 20 and the incoming cable 24 on the low-voltage side wall of the transformer 6. The high-voltage equipment 19 is provided with an air chamber 3, and the left and right sides of the air chamber 3 are respectively provided with a left incoming line sleeve. 1 and the right incoming line bushing 2 are connected with the incoming cable 24, the transformer 6 is provided with a shell 5, and the upper part of the high voltage side of the transformer shell 5 is equipped with a fully insulated high voltage outgoing line bushing 7, the There is an outlet bushing 4 on the back of the high-voltage equipment 19, the high-voltage outlet bushing 7 is connected to the outlet bushing 4, and the upper part of the low-voltage side of the transformer housing 5 is equipped with a low-voltage outlet bushing 8 composed of a conductive rod and a terminal , the low-voltage outlet bushing 8 protrudes into the low-voltage equipment 20 for electrical connection with low-voltage components.

Among them, the high-voltage incoming line side in this scheme can use TPS6 series box-type ring network cabinet, SF6 common box-type ring network cabinet or solid insulation ring network cabinet, but not limited to the above-mentioned box-type ring network cabinet, and the transformer 6 can use S11 transformer or Amorphous alloy transformers are not limited to the above-mentioned transformers.

Change the high-voltage outlet bushing 7 into a fully insulated type, which greatly reduces the connection size with the high-voltage cabinet, saves the space of the box, cancels the conventional cooling device on the low-voltage side, installs low-voltage components, and saves low-voltage equipment 20 installation space, so that the volume of the box is reduced.

Wherein, the air chamber 3 is provided with two outgoing line load switches with fuses and grounding, and the two outgoing line load switches are independent from each other and connected to the outgoing line bushings 4 respectively. The two outlet load switches are independent of each other, which greatly reduces the trouble and space of combining cabinets, and is also easy to install.

Wherein, the left wire inlet sleeve 1 and the right wire inlet sleeve 2 are equipped with a European-style front plug 21 , and are connected to the wire-incoming cable 24 through the European-style front plug 21 .

Furthermore, the way of entering and exiting the line is side entry and bottom exit, and both the entry and exit lines adopt wall bushings. This connection method greatly saves the internal installation space of the box transformer, and the connection of the cable 24 is fully insulated and can be touched with electricity, which is safe and reliable.

Wherein, the high voltage outlet bushing 7 is connected to the outlet bushing 4 through a cable accessory, wherein the cable accessory includes a T-shaped joint 22 and a copper pipe 23 .

Wherein, as shown in FIG. 6, the transformer 6 also includes a tap switch 11 that provides a constant voltage for the transformer 6 when the load changes, an oil thermometer 10 for measuring the oil temperature in the transformer 6, and an oil thermometer 10 for displaying the temperature of the oil in the transformer 6. The oil level gauge 9 for the oil position in the transformer housing 5, the tap changer 11, the oil temperature gauge 10, and the oil level gauge 9 are installed on the left side of the high voltage outlet bushing 7 respectively.

Wherein, the lower part of the high-voltage outlet bushing 7 on the high-voltage side of the transformer housing 5 is equipped with a corrugated sheet 12 that can dissipate heat quickly, and adopts a fast heat-dissipating structure design to ensure that the product can dissipate heat quickly.

Wherein, as shown in Fig. 7, Fig. 8, and Fig. 10, the low-voltage equipment 20 includes a low-voltage box body 15, a door panel 16 for installing low-voltage indicating and operating elements, and a mounting plate 17 for installing low-voltage switch elements. A plurality of bolts 14 are welded at the front edge of the transformer housing 5, and the low-voltage box 15 is mounted on the transformer housing 5 through the bolts 14, and the lower part of the transformer housing 5 is welded with a box-type fixing box with a top opening. plate 13, and the mounting plate 17 is fixed on the box-type fixing plate 13. The low-voltage structure of the box-type transformer not only meets the functional requirements, but also reduces the volume of the low-voltage equipment 20, thereby making the box-type transformer more compact.

Wherein, the mounting plate 17 is two metal plates welded side by side, and components are mounted on the mounting plate 17 in a straight line from left to right.

Wherein, as shown in FIG. 9 , fish scale holes 18 are provided at the upper and lower positions of the side wall of the low-pressure box body 15 , and the fish scale holes 18 are lined with dust-proof nets. It can not only increase heat dissipation, but also meet the requirements of IP level, where IP level is the protection level for the electrical equipment shell against the intrusion of foreign objects.

An embodiment of the present invention has been described in detail above, but the content described is only a preferred embodiment of the present invention, and cannot be considered as limiting the implementation scope of the present invention. All equivalent changes and improvements made according to the application scope of the present invention shall still belong to the scope covered by the patent of the present invention.

Claims (10)

1. a compact box-type substation, it is characterized in that: the transformer establishing two intervals in comprising, be positioned at the high-tension apparatus directly over described transformer, be positioned at the low-voltage equipment on the low-pressure side sidewall of described transformer, inlet wire cable, an air chamber is provided with in described high-tension apparatus, be respectively equipped with left entrance bushing on the left of described air chamber to be connected with described inlet wire cable with right entrance bushing with right side, housing is provided with outside described transformer, the high-voltage terminal sleeve pipe of described transformer shell high-pressure side installing all insulation, outlet casing tube is equipped with at described high-tension apparatus back, described high-voltage terminal sleeve pipe is connected with described outlet casing tube, described transformer shell low-pressure side is established by conducting rod and the molecular low-pressure line-outgoing sleeve pipe of terminals, described low-pressure line-outgoing sleeve pipe stretches in described low-voltage equipment and is electrically connected with low-voltage component.

2. a kind of compact box-type substation according to claim 1, is characterized in that: be provided with the outlet on-load switch that two band fuses are with ground in described air chamber, is independently also connected with described outlet casing tube respectively mutually between two described outlet on-load switches.

3. a kind of compact box-type substation according to claim 2, is characterized in that: described left entrance bushing and described right entrance bushing are equipped with European front plug, is connected with described inlet wire cable by described European front plug.

4. a kind of compact box-type substation according to claim 3, is characterized in that: the mode of line is outlet under the inlet wire of side, and line all adopts wall bushing.

5. a kind of compact box-type substation according to claim 1, is characterized in that: described high-voltage terminal sleeve pipe is connected by electric cable accessories with described outlet casing tube, and wherein electric cable accessories comprises T-joint and copper pipe.

6. a kind of compact box-type substation according to claim 1, it is characterized in that: described transformer also comprise for transformer provide when load variations the shunting switch of constant voltage, for measure oil temperature in described transformer oil thermometer, in order to show the oil level indicator that in described transformer shell, oil level is put, described shunting switch, described oil thermometer, described oil level indicator are installed on the left of described high-voltage terminal sleeve pipe respectively.

7. a kind of compact box-type substation according to claim 1, is characterized in that: described in the high-voltage terminal side of described transformer shell, be equiped with can the corrugated plate of quick heat radiating for high-voltage terminal casing part.

8. a kind of compact box-type substation according to claim 1, it is characterized in that: described low-voltage equipment comprises low pressure casing, the door-plate of low pressure instruction and class of operation element can be installed and the mounting panel of low tension switch class component can be installed, multiple bolt is welded in described transformer shell front edge position, described low pressure casing is installed on described transformer shell by described bolt, described transformer shell bottom has been welded open-topped boxlike fixed head, and described mounting panel is fixed on described boxlike fixed head.

9. a kind of compact box-type substation according to claim 8, is characterized in that: described mounting panel is the metallic plate of two chain intermittent weld, components and parts from left to right linearly type be installed on described mounting panel.

10. a kind of compact box-type substation according to claim 1, is characterized in that: described low-pressure cabinet body sidewall upper-lower position establishes fish scale hole, described fish scale hole place liner Air Filter.