CN218867918U

CN218867918U - Disconnect-type current limiting device convenient to overhaul

Info

Publication number: CN218867918U
Application number: CN202222910658.9U
Authority: CN
Inventors: 刘婕; 郝建军
Original assignee: Anhui Subao Electric Power Technology Co ltd
Current assignee: Anhui Subao Electric Power Technology Co ltd
Priority date: 2023-03-18
Filing date: 2023-03-18
Publication date: 2023-04-14
Anticipated expiration: 2033-03-18

Abstract

The utility model relates to an electric power system protection and control technical field especially relate to a disconnect-type current limiting device convenient to overhaul, including current limiting equipment body, control module, drive module and energy storage module, still include backstage power cabinet, backstage power cabinet disconnect-type sets up the outside at the current limiting equipment body, control module, drive module and energy storage module are from last to installing the internal side of cabinet at backstage power cabinet down, the current limiting equipment body passes through cable and backstage power cabinet and establishes circuit connection. The utility model discloses in, secondary control module and energy storage drive module and the separation of a high-voltage electricity body are installed in backstage quick-witted incasement, adopt cable junction between quick-witted case and the body, have realized the maintenance and the change of a electrified in-process, have guaranteed maintainer's security when having improved the power supply continuity of use scene to reduce one, the interference of secondary part electric field magnetic field, guaranteed the operating stability of secondary part.

Description

Disconnect-type current limiting device convenient to overhaul

Technical Field

The utility model relates to an electric power system protection and control technical field especially relate to a disconnect-type current limiting device convenient to overhaul.

Background

The separated current limiting device is one of current limiting devices, and is a device for judging a fault through collected data by a control unit when a bus is in a short circuit fault, and controlling a driving module to act to open a primary vacuum circuit breaker body and input a current limiting reactor to limit fault current.

The current limiting device is suitable for a three-phase alternating-current 50Hz and 7.2-40.5kV power supply system, is mainly installed at an outlet of a generator or an outlet of a low-voltage side of a main transformer, has the functions of quickly cutting off short-circuit current of a quick vacuum circuit breaker when a short-circuit accident occurs in a loop of a subordinate station, putting in a deep current limiting reactor to realize deep current limiting, ensuring safe breaking of the subordinate outgoing line breaker, and meanwhile has the functions of automatically switching on after the short-circuit current disappears and recovering to a normal operation state.

However, the existing current limiting device (as shown in fig. 5) still has the disadvantages that: secondary control module and energy storage drive module fuse with a high-voltage electricity body, when device itself breaks down, because the body is electrified, is not convenient for overhaul at the operation in-process, secondly, because control, energy storage and drive module fuse with high-voltage electricity body, under the effect of magnetic field and electric field, cause the interference to the secondary part, has reduced the stability of device operation in-process.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: in order to solve the problems that the existing current limiting device is inconvenient to overhaul under the condition that equipment is electrified and has poor operation safety and use stability, the separate current limiting device convenient to overhaul is provided.

In order to realize the purpose, the utility model adopts the following technical scheme:

the utility model provides a disconnect-type current limiting device convenient to overhaul, includes current limiting equipment body, control module, drive module and energy storage module, still includes the backstage power cabinet, backstage power cabinet disconnect-type sets up in the outside of current limiting equipment body, control module, drive module and energy storage module are from last to installing the internal side of cabinet at the backstage power cabinet down, the current limiting equipment body passes through cable and backstage power cabinet and establishes circuit connection.

As a further description of the above technical solution:

the lower extreme fixedly connected with installation base of current limiting equipment body, install single-phase current-limiting switch between the current limiting equipment body inboard and installation base upper end.

As a further description of the above technical solution:

the single-phase current-limiting switch comprises a vacuum arc extinguish chamber, an actuating mechanism and an insulating pull rod, wherein the vacuum arc extinguish chamber is connected with the actuating mechanism through the insulating pull rod.

As a further description of the above technical solution:

the upper end of the current-limiting equipment body is detachably provided with a current-limiting reactor, the left end of the current-limiting equipment body is provided with a current transformer, and the right end of the current-limiting equipment body is provided with a wall bushing facing a single-phase current-limiting switch.

As a further description of the above technical solution:

the current limiting switch is characterized in that a current limiting switch wire outlet end penetrating out of the wall bushing is installed at the right end of the single-phase current limiting switch, and a current limiting switch wire inlet end penetrating out of the current transformer is installed at the upper end of the single-phase current limiting switch.

As a further description of the above technical solution:

and the outlet end of the current-limiting switch and the inlet end of the current-limiting switch are connected with the current-limiting reactor through the power connection copper bar.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

the utility model discloses in, secondary control module and energy storage drive module and the separation of a high-voltage electricity body are installed in backstage quick-witted incasement, adopt cable junction between quick-witted case and the body, have realized the maintenance and the change of a electrified in-process, have guaranteed maintainer's security when having improved the power supply continuity of use scene to reduce one, the interference of secondary part electric field magnetic field, guaranteed the operating stability of secondary part.

Drawings

Fig. 1 is a schematic diagram of a structure of a detachable current limiting device convenient for maintenance according to the present invention;

FIG. 2 is a schematic structural view of a current limiting device body according to the present invention;

fig. 3 is a schematic structural diagram of the middle background power cabinet of the present invention;

fig. 4 is a schematic structural diagram of a single-phase current limiting switch according to the present invention;

fig. 5 is a schematic structural diagram of a current limiting apparatus in the prior art.

Illustration of the drawings:

1. a current limiting device body; 101. installing a base; 102. a wall bushing; 103. a single-phase current limiting switch; 1031. a vacuum arc-extinguishing chamber; 1032. an actuating mechanism; 1033. an insulating pull rod; 104. the outlet end of the current limiting switch; 105. a current limiting reactor; 106. a current transformer; 107. the inlet end of the current limiting switch; 108. connecting a power copper bar; 2. a background power supply cabinet; 201. a cabinet body; 202. a control module; 203. a drive module; 204. an energy storage module; 3. and (3) a cable.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: the utility model provides a disconnect-type current limiting device convenient to overhaul, including current limiting device body 1, control module 202, drive module 203 and energy storage module 204, still include backstage power cabinet 2, backstage power cabinet 2 disconnect-type sets up in the outside of current limiting device body 1, control module 202, drive module 203 and energy storage module 204 are from last to installing at the cabinet body 201 inboard of backstage power cabinet 2 down, current limiting device body 1 establishes circuit connection with backstage power cabinet 2 through cable 3, through the control module 202 with original integrative integration in current limiting device body 1 middle part switch board, drive module 203 and energy storage module 204, the disconnect-type is installed in backstage power cabinet 2, can make operating personnel operate on backstage power cabinet 2, alright carry out the automatically controlled of current limiting device body 1, overhaul and maintenance operation.

Specifically, as shown in fig. 1 to 4, a mounting base 101 is fixedly connected to a lower end of a current limiting device body 1, a single-phase current limiting switch 103 is installed between an inner side of the current limiting device body 1 and an upper end of the mounting base 101, and the single-phase current limiting switch 103 is fixedly installed on the mounting base 101 through a screw.

The single-phase current-limiting switch 103 comprises a vacuum arc extinguish chamber 1031, an action mechanism 1032 and an insulating pull rod 1033, wherein the vacuum arc extinguish chamber 1031 is connected with the action mechanism 1032 through the insulating pull rod 1033, a primary charged part of the device is isolated from the shell of the body, and the operation safety and stability are improved.

The upper end of the current limiting device body 1 is detachably provided with a current limiting reactor 105, the left end of the current limiting device body 1 is provided with a current transformer 106, and the right end of the current limiting device body 1 is provided with a wall bushing 102 facing a single-phase current limiting switch 103, so that the outlet end 104 of the current limiting switch can penetrate out of the current limiting device body 1 conveniently.

The right end of the single-phase current limiting switch 103 is provided with a current limiting switch outlet 104 which penetrates out of the wall bushing 102, and the upper end of the single-phase current limiting switch 103 is provided with a current limiting switch inlet 107 which penetrates out of a current transformer 106.

The current limiting switch lead-out terminal 104 and the current limiting switch lead-in terminal 107 are connected with the current limiting reactor 105 through the power connection copper bar 108, the current limiting device body 1, a power insulator is arranged between the current limiting switch lead-out terminal 104 and the current limiting reactor 105, the installation efficiency can be improved by the structure, the current limiting device is convenient to overhaul and disassemble, the convenience is improved, meanwhile, the stability and the safety of background operation are guaranteed under the condition of power supply, the wall penetrating sleeve short-circuit reactor is arranged between the single-phase current limiting switch 103 and the current limiting reactor 105 in the current limiting device body 1, and the wall penetrating sleeve short-circuit reactor is located on the outer side of the power connection copper bar 108.

The working principle is as follows: during the use, can concentrate the control circuit of one or more current-limiting device bodies 1 and be connected to backstage power cabinet 2 through cable 3, operating personnel operates control module 202 and drive module 203 during operation on backstage power cabinet 2, alright carry out the control to current-limiting device body 1, overhaul and the maintenance operation, avoided operating personnel directly to be close to electrified current-limiting device body 1, lead to the emergence of accident, thereby the security that operating personnel overhauld and maintained and the stability of current limiting device work have been promoted.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a disconnect-type current limiting device convenient to overhaul, includes current limiting device body (1), control module (202), drive module (203) and energy storage module (204), its characterized in that still includes backstage power cabinet (2), backstage power cabinet (2) disconnect-type setting is in the outside of current limiting device body (1), control module (202), drive module (203) and energy storage module (204) are from last to installing cabinet body (201) inboard at backstage power cabinet (2) down, circuit connection is established through cable (3) and backstage power cabinet (2) in current limiting device body (1).

2. The separable current limiting device convenient to overhaul according to claim 1, wherein a mounting base (101) is fixedly connected to a lower end of the current limiting device body (1), and a single-phase current limiting switch (103) is installed between the inner side of the current limiting device body (1) and the upper end of the mounting base (101).

3. An easy-to-service separate current limiting device according to claim 2, wherein the single-phase current limiting switch (103) comprises a vacuum interrupter (1031), an actuating mechanism (1032) and an insulating pull rod (1033), and the vacuum interrupter (1031) and the actuating mechanism (1032) are connected by the insulating pull rod (1033).

4. The separable current limiting device convenient to overhaul according to claim 3, wherein a current limiting reactor (105) is detachably mounted at the upper end of the current limiting device body (1), a current transformer (106) is mounted at the left end of the current limiting device body (1), and a wall bushing (102) facing the single-phase current limiting switch (103) is mounted at the right end of the current limiting device body (1).

5. The separable current limiting device convenient to overhaul according to claim 4, wherein a current limiting switch outlet end (104) penetrating out of the wall bushing (102) is installed at the right end of the single-phase current limiting switch (103), and a current limiting switch inlet end (107) penetrating out of the current transformer (106) is installed at the upper end of the single-phase current limiting switch (103).

6. The separable current-limiting device convenient to overhaul according to claim 5, wherein the outlet end (104) of the current-limiting switch and the inlet end (107) of the current-limiting switch are connected with the current-limiting reactor (105) through an electric connection copper bar (108).