Split-type box transformer substation structure of high-voltage circuit breaker

Abstract

The utility model discloses a split type box transformer substation structure of a high-voltage circuit breaker, and relates to the technical field of box transformer substations The split-type box transformer substation structure of the high-voltage circuit breaker comprises a transformer chamber, a high-voltage chamber and a low-voltage chamber, the high-voltage chamber and the low-voltage chamber are arranged on the side face of the transformer chamber. A transformer is arranged in the transformer chamber. The high-voltage chamber is divided into a high-voltage chamber body and a cable chamber through a separator plate. An isolating switch is arranged in the cable chamber, and a wall bushing is arranged on the cable chamber. And a circuit breaker and a grounding switch are arranged in the high-voltage chamber body. The grounding switch is arranged on the top of the cable chamber. And the isolating switch and the circuit breaker are connected in a way that the busbar passes through the wall bushing. The circuit breaker is connected with the grounding switch. The grounding switch is connected with the transformer. The split-type box transformer substation structure of the high-voltage circuit breaker is convenient for hoisting and transporting the box transformer substation, the sealing performance of the compartments is good, and accidents can be effectively prevented. And the circuit breaker, the isolating switch and the grounding switch are directly arranged in the high-voltage chamber, are independently mounted and can be independently replaced when damaged, so that the maintenance cost of the box transformer substation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of box-type transformers, and in particular to a split-type box-type transformer structure for a high-voltage circuit breaker. Background Art

[0002] Current box-type transformers utilize an integrated circuit breaker, disconnector, and grounding switch. Conventional solutions integrate these components in a high-voltage cabinet, which is then installed inside the box-type transformer. This complex structure results in high production costs. The high-voltage compartment is typically divided into two compartments. Because the circuit breaker itself is an integrated structure, these compartments cannot be enclosed, resulting in a compact space. If an arc occurs in one compartment, the incident can easily spread to the other. Utility Model Content

[0003] The purpose of the utility model is to provide a high-voltage circuit breaker split-type box-type transformer structure, which can arrange the circuit breaker, disconnector and grounding switch directly in the high-voltage room of the box-type transformer and install them independently instead of forming a separate cabinet, thereby reducing the manufacturing cost of the box-type transformer and improving the market competitiveness of the box-type transformer; the compartment has good sealing performance and can effectively prevent accidents.

[0004] The embodiment of the present utility model is achieved as follows:

[0005] The utility model provides a high-voltage circuit breaker split-type box-type transformer structure, comprising a transformer chamber, a high-voltage chamber and a low-voltage chamber, wherein the high-voltage chamber and the low-voltage chamber are both arranged on the side of the transformer chamber, the transformer chamber is provided with a transformer, the high-voltage chamber is separated into a high-voltage chamber body and a cable chamber by a partition, the cable chamber is provided with an isolating switch, the cable chamber is provided with a wall bushing, the high-voltage chamber body is provided with a circuit breaker and a grounding switch, the grounding switch is arranged on the top of the cable chamber, the isolating switch and the circuit breaker are connected through a busbar passing through the wall bushing, the circuit breaker is connected to the grounding switch, and the grounding switch is connected to the transformer.

[0006] In an optional embodiment, the high-voltage circuit breaker split-type box-type transformer structure also includes a current transformer, which is located in the high-voltage chamber body and installed on the top of the cable chamber. The transformer is connected to the current transformer, the grounding switch, the circuit breaker and the disconnector in sequence through a busbar.

[0007] In an optional embodiment, a high-voltage lightning arrester is provided at the bottom of the cable chamber, and the high-voltage lightning arrester is connected to the busbar.

[0008] In an optional embodiment, an insulator for supporting the busbar is provided on the top of the high-voltage chamber body.

[0009] In an optional embodiment, the disconnector is provided with a busbar, which is used to connect to an external cable.

[0010] In an optional embodiment, heat sinks are further provided on the sides of the transformer chamber.

[0011] In an optional embodiment, an interlocking mechanism is provided at the first inspection door of the high-voltage chamber body, the grounding switch and the isolating switch are connected to the interlocking mechanism through an interlocking rod, the circuit breaker is connected to the interlocking mechanism through a pull ring and a steel wire rope, or the circuit breaker is connected to the interlocking mechanism through a connecting rod, a pin, and a shaft, thereby forming a mechanical chain.

[0012] In an optional embodiment, the circuit breaker is provided at the first inspection door.

[0013] In an optional embodiment, the high-voltage circuit breaker split-type box-type transformer structure further includes a voltage transformer, which is connected to the transformer and is located at the bottom of the high-voltage chamber body.

[0014] In an optional embodiment, an intelligent measurement and control device is provided in the low-voltage chamber, and the intelligent measurement and control device can collect high- and low-voltage side protection level current transformer signals to realize transformer differential protection.

[0015] The beneficial effects of the embodiments of the present utility model are:

[0016] The utility model provides a high-voltage circuit breaker split-type transformer structure, which includes a transformer room, a high-voltage room and a low-voltage room. The high-voltage room and the low-voltage room are both arranged on the side of the transformer room to facilitate the lifting and transportation of the transformer. The high-voltage room is separated into a high-voltage room body and a cable room by a partition. An isolating switch is provided in the cable room. A wall bushing is provided on the cable room. A circuit breaker and a grounding switch are provided in the high-voltage room body. The grounding switch is provided on the top of the cable room. The isolating switch and the circuit breaker are connected through a busbar passing through the wall bushing. The circuit breaker is connected to the grounding switch. The grounding switch is connected to the transformer. By providing a sealed cable room in the high-voltage room, the high-voltage room is divided into an upper and lower double-layer structure, with the lower part forming a cable room with good sealing performance, which can effectively prevent accidents. The circuit breaker, isolating switch and grounding switch are directly arranged in the high-voltage room and no longer form a separate cabinet. They are installed independently and can be replaced individually if damaged, thereby reducing the maintenance cost of the transformer and improving the market competitiveness of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A front view of a split-type box-type transformer structure for a high-voltage circuit breaker provided in an embodiment of the present utility model;

[0019] Figure 2 This is a top view of the split-type box-type transformer structure for a high-voltage circuit breaker provided in an embodiment of the utility model.

[0020] Icons: 100- split-type box-type transformer structure for high-voltage circuit breaker; 10- transformer room; 11- transformer; 12- heat sink; 20- high-voltage room; 21- high-voltage room body; 211- circuit breaker; 212- earthing switch; 213- insulator; 214- current transformer; 215- interlocking mechanism; 216- interlocking rod; 22- cable room; 221- third inspection door; 222- high-voltage lightning arrester; 23- partition; 231- wall bushing; 24- first inspection door; 25- second inspection door; 30- low-voltage room; 31- fourth inspection door. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0026] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0027] Please refer to Figure 1 and Figure 2 This embodiment provides a high-voltage circuit breaker split-type box transformer structure 100, which includes a transformer chamber 10, a high-voltage chamber 20 and a low-voltage chamber 30. The high-voltage chamber 20 and the low-voltage chamber 30 are arranged side by side on one side of the transformer chamber 10 in a finished product shape. A transformer 11 is provided in the transformer chamber 10, and a heat sink 12 is provided on one side of the transformer chamber 10 to increase the efficiency of natural ventilation. The high-voltage chamber 20 is separated into a high-voltage chamber body 21 and a cable chamber 22 by a partition 23. An isolating switch is provided in the cable chamber 22. A wall bushing 231 is provided on the cable chamber 22. A circuit breaker 211 and a grounding switch 212 are provided in the high-voltage chamber body 21. The grounding switch 212 is arranged at the top of the cable chamber 22. The isolating switch and the circuit breaker 211 are connected through the busbar through the wall bushing 231. The circuit breaker 211 is connected to the grounding switch 212. The grounding switch 212 is connected to the transformer 11.

[0028] Please refer to Figure 1In this embodiment, the disconnector is mounted on the top of the cable compartment 22 via a mounting bracket. A wall bushing 231 is installed on one side of the disconnector. The cable compartment 22 is located at the bottom of the high-voltage compartment 20. The high-voltage circuit breaker split-type transformer structure 100 also includes a current transformer 214, which is located within the high-voltage compartment body 21 and mounted on the top of the cable compartment 22. The transformer 11 is connected to the current transformer 214, the grounding switch 212, the circuit breaker 211, and the disconnector in this order via a busbar.

[0029] Furthermore, in this embodiment, the high-voltage circuit breaker split-type box-type transformer structure 100 further includes a voltage transformer (not shown). The voltage transformer is connected to the transformer 11 and is located at the bottom of the high-voltage chamber body 21.

[0030] Optionally, to ensure the safety of the box-type transformer, a high-voltage lightning arrester 222 is installed at the bottom of the cable chamber 22. The high-voltage lightning arrester 222 is connected to the busbar. Furthermore, an insulator 213 is installed at the top of the high-voltage chamber body 21 to support the busbar. Optionally, in this embodiment, insulators 213 are also installed on the inner and outer walls of the cable chamber 22 to support the busbar.

[0031] In this embodiment, the disconnector is provided with a busbar. The busbar is used to connect to external cables. Optionally, in this embodiment, the busbar can accommodate three busbar input and output lines.

[0032] Please refer to Figure 2 To facilitate maintenance or component replacement, in this embodiment, the high-voltage chamber body 21 is provided with a first maintenance door 24 and a second maintenance door 25. The cable chamber 22 is provided with a third maintenance door 221. The low-voltage chamber 30 is provided with a fourth maintenance door 31.

[0033] Please continue to refer to Figure 1 An interlocking mechanism 215 is installed at the first access door 24. The grounding switch 212 and the disconnector are connected to the interlocking mechanism 215 via an interlocking rod 216. The circuit breaker 211 is connected to the interlocking mechanism 215 via a pull ring and a steel cable, or via a connecting rod, pin, and shaft, thereby forming a mechanical interlock. Furthermore, the circuit breaker 211 is installed at the first access door 24 to facilitate connection to the interlocking mechanism 215 and facilitate maintenance.

[0034] Optionally, the first inspection door 24, the second inspection door 25 and the third inspection door 221 are provided with electromagnetic locks with power indicators, and mechanical locks are additionally installed on the outside of the doors.

[0035] Please refer to Figure 2An intelligent measurement and control device is also arranged in the low-voltage room 30. The intelligent measurement and control device can collect the signals of the high- and low-voltage side protection-level current transformers 214 to realize differential protection of the transformer 11, mainly protecting various phase-to-phase short-circuit faults occurring inside the transformer 11 winding and on its lead-out wires.

[0036] Optionally, the low-voltage room 30 is equipped with a low-voltage cabinet, an auxiliary transformer 11, a UPS, and a manhole. A low-voltage frame circuit breaker 211 is arranged in the low-voltage cabinet. The upper port of the low-voltage frame circuit breaker 211 is connected to the transformer 11 via a flexible connector, and the lower port of the low-voltage frame circuit breaker 211 is connected to the external incoming cable via a busbar.

[0037] The working principle and process of a high-voltage circuit breaker split-type box-type transformer structure 100 provided by the embodiment of the utility model are as follows:

[0038] First, install the disconnector in the cable compartment 22 using the mounting bracket. Connect the busbar through the wall bushing 231 to the circuit breaker 211 in the high-voltage compartment 21. Then, connect the circuit breaker 211 to the static contacts of the grounding switch 212 via the busbar. Continue connecting the grounding switch 212 to the current transformer 214 via a cable. The cable is supported by the insulator 213 at the top of the high-voltage compartment 21 to prevent it from falling. Finally, connect the current transformer 214 to the transformer 11 via a cable. The grounding switch 212 and disconnector are connected to the interlocking mechanism 215 via the interlocking rod 216. The circuit breaker 211 is connected to the interlocking mechanism 215 via a pull ring and wire rope, completing the mechanical interlock.

[0039] The beneficial effects of the high-voltage circuit breaker split-type box-type transformer structure 100 provided by the embodiment of the utility model are:

[0040] The utility model provides a high-voltage circuit breaker split-type transformer structure 100, which includes a transformer chamber 10, a high-voltage chamber 20 and a low-voltage chamber 30. The high-voltage chamber 20 and the low-voltage chamber 30 are both arranged on the side of the transformer chamber 10, which is convenient for lifting and transportation of the transformer. The high-voltage chamber 20 is separated into a high-voltage chamber body 21 and a cable chamber 22 by a partition 23. An isolating switch is provided in the cable chamber 22. A wall bushing 231 is provided on the cable chamber 22. A circuit breaker 211 and a grounding switch 212 are provided in the high-voltage chamber body 21. The grounding switch 212 is arranged on the top of the cable chamber 22. The isolating switch and the circuit breaker 211 are connected through the busbar passing through the wall bushing 231. The circuit breaker 211 is connected to the grounding switch 212. The grounding switch 212 is connected to the transformer 11. By setting up a sealed cable chamber 22 in the high-voltage chamber 20, the high-voltage chamber 20 is divided into an upper and lower double-layer structure, and the cable chamber 22 is formed in the lower part, which has good sealing performance and can effectively prevent accidents; the circuit breaker 211, disconnector, and grounding switch 212 are directly arranged in the high-voltage chamber 20, and are no longer required to be installed in separate cabinets. They can be replaced separately if damaged, reducing the maintenance cost of the box-type transformer and improving the market competitiveness of the box-type transformer.

[0041] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A split-type box-type transformer structure for a high-voltage circuit breaker, characterized in that: It includes a transformer room, a high-voltage room and a low-voltage room. The high-voltage room and the low-voltage room are both arranged on the side of the transformer room. The transformer room is provided with a transformer. The high-voltage room is separated into a high-voltage room body and a cable room by a partition. The cable room is provided with an isolating switch. The cable room is provided with a wall bushing. A circuit breaker and a grounding switch are provided in the high-voltage room body. The grounding switch is arranged on the top of the cable room. The isolating switch and the circuit breaker are connected through a busbar passing through the wall bushing, the circuit breaker is connected to the grounding switch, and the grounding switch is connected to the transformer.

2. The high-voltage circuit breaker split-type box-type transformer structure according to claim 1 is characterized in that: The high-voltage circuit breaker split-type box-type transformer structure also includes a current transformer, which is located in the high-voltage chamber body and installed on the top of the cable chamber. The transformer is connected in sequence through the busbar and the current transformer, the grounding switch, the circuit breaker and the isolating switch.

3. The high-voltage circuit breaker split-type box-type transformer structure according to claim 2 is characterized in that: A high-voltage lightning arrester is provided at the bottom of the cable chamber, and the high-voltage lightning arrester is connected to the busbar.

4. The high-voltage circuit breaker split-type box-type transformer structure according to claim 2 is characterized in that: An insulator for supporting the busbar is provided on the top of the high voltage chamber body.

5. The high-voltage circuit breaker split-type box-type transformer structure according to claim 1 is characterized in that: The isolating switch is provided with a busbar, and the busbar is used for connecting with an external cable.

6. The high-voltage circuit breaker split-type box-type transformer structure according to claim 1, characterized in that: The side of the transformer chamber is also provided with a heat sink.

7. The high-voltage circuit breaker split-type box-type transformer structure according to claim 1, characterized in that: An interlocking mechanism is provided at the first inspection door of the high-voltage chamber body, the grounding switch and the isolating switch are connected to the interlocking mechanism through an interlocking rod, the circuit breaker is connected to the interlocking mechanism through a pull ring and a steel wire rope, or the circuit breaker is connected to the interlocking mechanism through a connecting rod, a pin, and a shaft, thereby forming a mechanical interlock.

8. The high-voltage circuit breaker split-type box-type transformer structure according to claim 7 is characterized in that: The circuit breaker is arranged at the first inspection door.

9. The high-voltage circuit breaker split-type box-type transformer structure according to claim 1, characterized in that: The high-voltage circuit breaker split-type box-type transformer structure also includes a voltage transformer, which is connected to the transformer and is located at the bottom of the high-voltage chamber body.

10. The high-voltage circuit breaker split-type box-type transformer structure according to claim 1, characterized in that: An intelligent measurement and control device is arranged in the low voltage room, and the intelligent measurement and control device can collect the current transformer signals of the high and low voltage side protection levels to realize the transformer differential protection.

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