CN214255397U

CN214255397U - Integrated medium-voltage cabinet and vertical box transformer substation

Info

Publication number: CN214255397U
Application number: CN202120326171.9U
Authority: CN
Inventors: 陈锡阳
Original assignee: Shenzhen Dailu Technology Co ltd
Current assignee: Shenzhen Dailu Technology Co ltd
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2021-09-21
Anticipated expiration: 2031-02-05

Abstract

The utility model discloses an integrated form middling pressure cabinet and vertical case become, a cabinet body, relative inlet wire end and leading-out terminal are established to the cabinet body, the inlet wire end stretches out at least a set of inlet wire joint and is used for connecting the inlet wire cable, the leading-out terminal stretches out at least a set of outlet wire joint and is used for connecting the outlet wire cable, and the whole primary circuit component that contains the external insulation structure of electric main wiring divide two integrated package to be in inlet wire end and the leading-out terminal, a plurality of groups of connecting wires are according to the parallel electric connection whole one by one of three-phase primary circuit component. The utility model discloses following beneficial effect has: 1. the space is greatly saved, and site selection construction is facilitated; 2. the sheet metal structure of the cabinet body and the joints and the lengths of the connecting conductors are greatly saved; 3. realize the gas tightness easily, safe and reliable, the cabinet door can be opened and closed, and convenient the maintenance is overhauld, and confined air satisfies the environmental protection requirement as insulating medium.

Description

Integrated medium-voltage cabinet and vertical box transformer substation

Technical Field

The utility model relates to a medium voltage switchgear field especially relates to an integrated form medium voltage switchgear and vertical case become.

Background

The medium-voltage switch cabinet (referred to as a medium-voltage cabinet for short) is a necessary component of a pre-installed box-type substation (referred to as a box transformer substation for short), is widely applied to a power distribution network, and under the background of times of scarce land and increasing attention on environmental protection, the miniaturized environment-friendly medium-voltage cabinet and box transformer substation are electric equipment which are needed urgently at present. A plurality of function cabinets are arranged according to different functions of the existing medium voltage cabinet, such as a wire inlet cabinet, a circuit breaker cabinet, a PT cabinet, a metering cabinet and the like, and the function cabinets are mutually assembled and are transversely connected in a penetrating manner through a bus to realize the main electrical wiring function. The connecting wire of the prior art is complicated, and occupation space is big, connects many, takes place not hard up trouble of generating heat easily, and primary loop element installs at a plurality of cabinets internally, and the leakproofness is relatively poor, is difficult to guarantee insulating properties under the adverse circumstances. In order to reduce the volume of the medium-voltage cabinet and improve the insulating property, the SF6 gas-filled cabinet technology is mainly adopted at present. However, the internal air pressure of the SF6 gas-filled cabinet is greater than the external atmospheric pressure, the manufacturing process is complex, the cost is high, the risk of SF6 leakage exists, the totally closed cabinet body is integrally welded, and the cabinet body cannot be opened on site to repair and replace components. Since SF6 is the strongest greenhouse gas in the world, its single molecule greenhouse effect is 2.2 ten thousand times that of carbon dioxide. About 80% of the global SF6 is used as an insulating medium, with a global annual emission of about 8,100 tons, which corresponds to about 1 million new cars producing carbon dioxide emissions per year. The environmental sector advocates reducing the use of SF6 gas in electrical equipment. How to adopt the insulating properties requirement of environmental protection gas satisfying adverse circumstances to reduce the volume of middling pressure cabinet and case becomes is a subject that has important value, also is a difficult problem that needs solution all over the world.

SUMMERY OF THE UTILITY MODEL

To prior art's weak point, the utility model provides an integrated form middling pressure cabinet and vertical case become to solve above-mentioned technical problem.

The technical scheme of the utility model provide an integrated form middling pressure cabinet, the intelligent cabinet temperature adjusting device comprises a cabinet body, relative inlet wire end and leading-out terminal are established to the cabinet body, the inlet wire end stretches out at least a set of inlet wire joint and is used for connecting the inlet wire cable, the leading-out terminal stretches out at least a set of outlet wire joint and is used for connecting the outlet wire cable, and the whole primary circuit component that contains the external insulation structure of electric main wiring divides two integrated package to be in inlet wire end and the leading-out terminal, a plurality of groups of connecting wires are according to the parallel electric connection whole one by one of three-phase primary circuit component, a plurality of cabinet doors are seted up to the cabinet body, when the cabinet door is closed the cabinet body keeps the enclosed state.

As the utility model discloses a preferred, the cabinet door includes the pressure release valve, the pressure release valve is in when cabinet body internal air pressure surpassed the threshold value, automatic opening.

As an optimization of the present invention, the observation window is disposed on the side wall of the cabinet body, and the observation window includes a transparent plate for checking the operating status of the primary loop element.

As the utility model discloses a preferred, an additional finned tube radiator in side of the cabinet body, finned tube radiator includes upper airway and lower air flue, the internal hot-air of cabinet is followed the upper airway gets into finned tube radiator sinks through cooling back density grow, gets into from the lower air flue the cabinet body realizes the circulation heat dissipation.

As the utility model discloses a preferred, the external dampproof device of cabinet body through-hole, the built-in drier of dampproof device.

As the utility model discloses a preferred, the primary circuit component include first load switch and second load switch install in the inlet wire end, first load switch with each side joint of second load switch stretches out the external work of cabinet the inlet wire connects, installs including first operating device and second operating device the outside of the cabinet body is controlled the butt joint through dynamic seal subassembly first load switch with second load switch.

As the utility model discloses a preferred, install a high-pressure fuse-type combination switch in the leading-out terminal, the operating device of high-pressure fuse-type combination switch installs the external side of cabinet is controlled through the dynamic seal subassembly and is docked high-pressure fuse-type combination switch.

As the utility model discloses a preferred, install a circuit breaker handcart, mutual inductor group and protection measurement and control device in the leading-out terminal, the circuit breaker handcart can move out the cabinet body is experimental and is overhauld.

As the utility model discloses a preferred, install a measurement cabinet handcart in the inlet wire end, the measurement cabinet handcart is including the measurement cabinet body, mutual inductor group and electric energy meter, mutual inductor group is in measurement cabinet back inserts through a measurement dodge gate the cabinet body, the electric energy meter encapsulation in the measurement cabinet is internal.

The technical scheme of the utility model still further provide a vertical case becomes, an integrated form middling pressure cabinet install in case shell top one end, low voltage distribution cabinet is installed to the case shell top other end, the transformer is installed to the case shell below, incoming cable leads to through the cable tray outside the case shell, be qualified for the next round of competitions connect with transformer electric connection. The cabinet door comprises a pressure release valve, and the pressure release valve is opened when the pressure of the cabinet body exceeds a preset pressure.

The utility model discloses following beneficial effect has: 1. the utility model is used to integrate 2-5 functional cabinets of the existing medium voltage switch cabinet into an integrated medium voltage cabinet, which greatly saves space, can be arranged above the transformer of the pre-installed box transformer, obviously reduces the occupied area and is beneficial to site selection construction; 2. the integrated medium-voltage cabinet can greatly save the sheet metal structure of the cabinet body and the joint and the length of the connecting conductor, greatly reduce the cost and improve the reliability of equipment; 3. the primary loop element is sealed in the single cabinet body, sealed and clean air is used as an insulating medium, the environment-friendly requirement is met, and meanwhile, the cabinet door can be opened, so that the overhaul and maintenance are convenient.

Drawings

Fig. 1 is a schematic perspective view of embodiment 1 of the present invention;

fig. 2 is a schematic view of the internal structure of embodiment 1 of the present invention;

fig. 3 is a schematic view of the internal structure of embodiment 2 of the present invention;

fig. 4 is a schematic view of the internal structure of embodiment 3 of the present invention;

fig. 5 is the structural schematic diagram of a vertical box transformer substation of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 and fig. 2, as the utility model discloses an embodiment 1, the utility model relates to an integrated form middling pressure cabinet, including a cabinet body 1, relative inlet wire end and leading-out terminal are established to cabinet body 1, the inlet wire end stretches out first inlet wire connector 21 (including the ABC three-phase joint, down with) and second inlet wire connector 22 (including the ABC three-phase joint, down with) and is used for connecting the inlet wire cable, the leading-out terminal stretches out a set of outlet wire connector 16 (including the ABC three-phase joint, down with) and is used for connecting the outlet wire cable, whole primary circuit components of electric main connection (seeing fig. 2) divide two integrated encapsulation in inlet wire end (leaning on first inlet wire connector 21 one end) and leading-out terminal (leaning on outlet wire connector 16 one end), a plurality of groups connecting wire 12 are according to the parallel electric connection of three-phase and all contain the primary circuit component of outer insulation structure one by one, cabinet body 1 sets up cabinet door 40, cabinet body 1 keeps the closed state when cabinet door 40 closes. The cabinet door 40 includes the pressure release valve (install in the top of the cabinet body 1 usually, not mark), and when the inside short circuit fault that takes place of cabinet, cause the cabinet internal pressure to rise in the twinkling of an eye, the pressure release valve is opened automatically when the air pressure in the cabinet body 1 surpasss the threshold value, and in time release pressure avoids the cabinet body explosion, and operating personnel will be avoided to the orientation of pressure release valve, avoids electric arc and steam bodily injury.

An observation window 41 is arranged on the side wall of the cabinet body 1, the observation window 41 is embedded on the side wall of the cabinet body 1 in a sealing mode by adopting a transparent plate such as organic glass and is used for checking the working state of the primary loop element, an explosion-proof metal door can be optionally installed on the observation window 41, and the explosion-proof metal door is opened only during observation.

The side of the cabinet body 1 is additionally provided with a finned tube radiator 26, the finned tube radiator 26 comprises an upper air passage and a lower air passage which are respectively communicated with the top and the bottom of the cabinet body, a primary loop element in the cabinet body 1 generates hot air through current, the hot air enters the finned tube radiator 26 from the upper air passage, the density of the hot air is increased after the hot air is cooled, the hot air sinks, and the hot air enters the cabinet body 1 again from the lower air passage, so that the circulating heat dissipation is realized. In order to enhance the heat dissipation capability, the fan 25 can be additionally arranged on the upper air passage, and when the fan 25 is started, the hot air circulation is accelerated, and the heat dissipation capability is improved.

The external dampproof device 28 of cabinet body 1 through-hole, dampproof device 28 are installed in lower air flue, and the silica gel drier is built-in to dampproof device 28, plays drying effect when cooling air circulation process, promotes the insulating properties of primary circuit component. The moisture-proof device 28 is provided with a breathing hole to prevent moist air from entering the cabinet 1 when the cabinet 1 changes in cold or hot.

The primary circuit element of embodiment 1 includes a first load switch 31 and a second load switch 32 installed in the incoming line terminal, a side terminal of the first load switch 31 extends out of the cabinet 1 and serves as the incoming line terminal 21, and a side terminal of the second load switch 32 extends out of the cabinet 1 and serves as the incoming line terminal 22. Comprises a first operating mechanism 29 and a second operating mechanism 30 which are arranged at the outer side of the cabinet body 1, and a first load switch 31 and a second load switch 32 which are butted with each other are operated through a dynamic sealing component. The electrical main wiring of embodiment 1 is suitable for a ring network wiring or a double-loop power supply system. The first load switch 31 and the second load switch 32 adopt three-position load switches, and the change of various wiring modes can be flexibly realized. The incoming line connects 21 and the incoming line connects 22 adopts the plug-in structure, can make things convenient for plug connecting cable plug, simultaneously, the overhead plug-in arrester that can further connect of cable plug (plug-in arrester electrified body is totally wrapped by insulating material, does not contain outer insulation system, does not have the pollution flashover risk), can save the internal space of cabinet.

The circuit breaker handcart 2, the mutual inductor group and the outlet connector 16 are arranged in the outlet end, the mutual inductor group comprises a three-phase current mutual inductor 5 and a three-phase voltage mutual inductor 3, the voltage mutual inductor 3 is connected with the connecting wire 12 through a fuse 4, the secondary wiring of the current mutual inductor 5 and the voltage mutual inductor 3 is connected with the protection measurement and control device 17, and the protection measurement and control device 17 is connected with the circuit breaker 2 to realize the action of controlling the switch. The circuit breaker handcart 2 can be moved out of the cabinet body 1 for testing and overhauling. The embodiment 1 adopts the scheme of the circuit breaker, so that the intelligent control of the switch can be conveniently realized, and larger short-circuit current can be cut off, and the circuit breaker is suitable for a box-type substation with larger capacity (more than 630 kV). The outlet connector 16 is arranged in a groove at the bottom of the cabinet body, so that the middle-pressure cabinet can be conveniently stacked and transported, and the outlet connector 16 is arranged at an inclination angle, so that the space is saved.

In order to realize high-voltage metering, a metering cabinet handcart is arranged in a wire inlet end, the metering cabinet handcart comprises a metering cabinet body 7, a mutual inductor group 33 and an electric energy meter 8, the mutual inductor group 33 is arranged on the back of the metering cabinet body 7 and is inserted into the cabinet body 1 through a metering movable door, and the electric energy meter 8 is packaged in the metering cabinet body 7. The transformer group 33 of this embodiment 1 includes two current transformers and two voltage transformers arranged in a row, and thus the height is effectively reduced.

The outlet connector 16 and the post insulator 15 have the function of a live sensor, and a detection signal is transmitted to the live sensor 18 to display whether a primary loop element connected to each section of wiring is live or not.

Because the utility model discloses having removed traditional generating line structure, having arranged into one line from top to bottom at two load switch of inlet wire end and measurement mutual-inductor, having adopted segmentation connected mode, realized the function of traditional inlet wire cabinet and measurement cabinet, another line is arranged from top to bottom to measurement mutual-inductor group, circuit breaker and the connector of being qualified for the next round of competitions, has adopted segmentation connected mode, has realized the function of traditional outlet wire cabinet and PT cabinet. Two rows of primary circuit elements are connected at the upper end. All primary loop elements (see figure 2) of the electric main connection wire containing an external insulation structure are integrated and packaged in a cabinet body in two rows, and connecting wires of the two rows of primary loop elements are supported by insulation supports, so that the electric safety distance and the mechanical strength between the connecting wires are ensured. Adopt the utility model discloses a connected mode has avoided the joint between the numerous connecting wire of quantity that traditional generating line connected mode leads to and, avoided traditional generating line to walk the crossing phenomenon of line direction and a return circuit component joint direction, reduced the electrical insulation space that occupies around the connecting wire by a wide margin, thereby realized having reduced the volume of middling pressure cubical switchboard by a wide margin.

As shown in fig. 3, embodiment 2 of the present invention is different from embodiment 1 in that embodiment 1 has only one loop incoming line and is suitable for a terminal substation. The plug-in connector 13 can be connected with a wire cable in a plug-in manner. The lightning arrester 14 (containing an external insulation structure) and the current transformer 11 are connected through a connecting wire 12, and the current transformer 11 is connected with the voltage transformer 6 through a fuse 9. The plug-in type connector 13, the lightning arrester 14, the current transformer 11, the fuse 9 and the voltage transformer 6 are connected into a line of incoming terminals through a connecting wire 12. The current transformer 11 and the voltage transformer 6 are installed on a back plate of the metering cabinet body 7, the electric energy meter 8 and the remote data terminal 10 are packaged in the metering cabinet body 7, and the metering cabinet handcart structure is integrally formed and is convenient to install and overhaul on site. The circuit breaker handcart 2, the mutual inductor group and the outlet connector 16 are arranged in the outlet end, the mutual inductor group comprises a three-phase current mutual inductor 5 and a three-phase voltage mutual inductor 3, the voltage mutual inductor 3 is connected with the connecting wire 12 through a fuse 4, the secondary wiring of the current mutual inductor 5 and the voltage mutual inductor 3 is connected with the protection measurement and control device 17, and the protection measurement and control device 17 is connected with the circuit breaker 2 to realize the action of controlling the switch. The circuit breaker handcart 2 can be moved out of the cabinet body 1 for testing and overhauling. Embodiment 2 adopts the circuit breaker scheme can conveniently realize switch intelligent control, also can cut off great short-circuit current, is fit for the box-type substation use of great capacity (more than 630 kV). The outlet connector 16 is arranged in a groove at the bottom of the cabinet body, so that the middle-pressure cabinet can be conveniently stacked and transported, and the outlet connector 16 is arranged at an inclination angle, so that the space is saved.

As shown in fig. 4, the embodiment 3 of the present invention is different from the embodiment 1 in that only one high-voltage fusing type combination switch 37 and the outlet connector 16 are arranged in a row at the outlet end, the high-voltage fusing type combination switch is opened, the operating mechanism of 37 (similar to the operating mechanism of the load switch 31, not shown) is installed at the outer side of the cabinet, and the high-voltage fusing type combination switch 37 is controlled and butted by the dynamic seal assembly. The high-voltage fuse type combined switch 37 suitable for protecting the transformer comprises functions of a vacuum switch, a fuse, grounding and the like. The cabinet body 1 is opened at one side of the high-voltage fuse type combination switch 37, so that overhaul work such as fuse replacement can be conveniently carried out. The line connector 21 and the line connector 22 are connected in the present embodiment by means of a common cable terminal connector (different from a plug connector), only for explaining that the connector form can be changed as required. The elements and connections in the line at the inlet end are the same as those in embodiment 1, and the description thereof will not be repeated.

It can be seen from the

embodiments

1, 2 and 3 that the idea of the present invention is to provide a cabinet 1, in which the cabinet 1 can be designed into a structure with a standard size and shape, and applied to a box-type substation, all primary circuit elements of an electrical main connection wire including an external insulation structure can be packaged in one cabinet 1; the wire inlet end extends out of the wire inlet joint and is used for connecting an incoming wire cable which enters from the outside, the wire outlet end extends out of the wire outlet joint and is used for connecting a transformer through the wire outlet cable, and the space below the box-type substation can be fully utilized to arrange a wire inlet and a wire outlet; all primary circuit elements of the electric main wiring are integrated and packaged in the wire inlet end and the wire outlet end in two rows, and the primary circuit elements can be combined and used according to requirements.

As shown in fig. 5, the technical solution of the present invention further provides a vertical box transformer, an integrated medium voltage cabinet 1 is installed in one end above a box shell 52, a low voltage power distribution cabinet 51 is installed at the other end above the box shell 52, a transformer 54 is installed below the box shell 52, an incoming cable 56 (only one cable is indicated in the figure, and the other types are the same) is led to the outside of the box shell 52 through a cable trough box 55, and an outgoing line connector 16 is electrically connected with the transformer 54. The cabinet body 1 comprises a pressure release valve which is communicated with a top valve 53 of the box shell 52 and is opened when the pressure of the cabinet body 1 exceeds the preset pressure, so that the injury to operators and nearby personnel can be avoided. In fig. 5, each side of the cabinet 52 includes a door to form a protection space, and a part of the door is not shown in order to express the structure inside the cabinet. Based on the utility model discloses a vertical case becomes of thought construction has reduced occupation of land and space by a wide margin, and case shell 52 structure can be followed all directions and opened the door, makes things convenient for the operation maintenance and changes or increase the component, saves the power off time of repairing the transformation by a wide margin.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and are not intended to limit the spirit and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by the technical solution of the present invention by those skilled in the art should fall into the protection scope of the present invention, and the technical contents claimed by the present invention have been fully recorded in the claims.

Claims

1. An integrated form middling pressure cabinet which characterized in that: including a cabinet body, relative inlet wire end and leading-out terminal are established to the cabinet body, the inlet wire end stretches out at least a set of inlet wire and connects and be used for connecting the inlet wire cable, the leading-out terminal stretches out at least a set of outlet wire and connects and be used for connecting the outlet wire cable, and electric main connection's whole primary circuit component that contains outer insulation system divides two integrated package to be in inlet wire end and the leading-out terminal, a plurality of groups of connecting wires are parallel according to the three-phase electric connection whole one by one primary circuit component, a plurality of cabinet doors are seted up to the cabinet body, when the cabinet door is closed the cabinet body keeps the closed condition.

2. An integrated medium voltage cabinet according to claim 1, wherein: the cabinet door comprises a pressure release valve which is automatically opened when the air pressure in the cabinet body exceeds a threshold value.

3. An integrated medium voltage cabinet according to claim 1, wherein: the side wall of the cabinet body is provided with an observation window, and the observation window comprises a transparent plate used for checking the working state of the primary loop element.

4. An integrated medium voltage cabinet according to claim 1, wherein: the side of the cabinet body is additionally provided with a finned tube radiator, the finned tube radiator comprises an upper air passage and a lower air passage, hot air in the cabinet body enters the finned tube radiator from the upper air passage, the density of the hot air is increased after the hot air is cooled, the hot air sinks, and the hot air enters the cabinet body from the lower air passage to realize circulating heat dissipation.

5. An integrated medium voltage cabinet according to claim 1, wherein: the through hole of the cabinet body is externally connected with a moisture-proof device, and a drying agent is arranged in the moisture-proof device.

6. An integrated medium voltage cabinet according to claim 1, wherein: the primary loop element comprises a first load switch and a second load switch, the first load switch and the second load switch are arranged in the wire inlet end, joints on one side of each of the first load switch and the second load switch extend out of the cabinet body and are used as the wire inlet joints, the primary loop element comprises a first operating mechanism and a second operating mechanism, the first operating mechanism and the second operating mechanism are arranged on the outer side of the cabinet body, and the first load switch and the second load switch are in butt joint through a dynamic sealing component.

7. An integrated medium voltage cabinet according to claim 1, wherein: the high-voltage fuse type combination switch is characterized in that a high-voltage fuse type combination switch is arranged in the wire outlet end, an operating mechanism of the high-voltage fuse type combination switch is arranged on the outer side of the cabinet body, and the high-voltage fuse type combination switch is controlled to be in butt joint through a movable sealing component.

8. An integrated medium voltage cabinet according to claim 1, wherein: a circuit breaker handcart, a mutual inductor group and a protection measurement and control device are arranged in the wire outlet end, and the circuit breaker handcart can be moved out of the cabinet body to test and overhaul.

9. An integrated medium voltage cabinet according to claim 1, wherein: a metering cabinet handcart is installed in the wire inlet end and comprises a metering cabinet body, a transformer group and an electric energy meter, the transformer group is arranged on the back of the metering cabinet body and inserted into the cabinet body through a metering movable door, and the electric energy meter is packaged in the metering cabinet body.

10. The utility model provides a vertical case becomes, includes a case shell of installing a plurality of chamber doors, its characterized in that: the integrated medium voltage cabinet as claimed in any one of claims 1 to 9, wherein a low voltage distribution cabinet is installed at one end above the cabinet housing, a transformer is installed below the cabinet housing, the incoming cable is guided out of the cabinet housing through a cable trough box, and the outgoing connector is electrically connected to the transformer.