WO2024138880A1

WO2024138880A1 - Outdoor box-type substation and wind power system

Info

Publication number: WO2024138880A1
Application number: PCT/CN2023/081115
Authority: WO
Inventors: 孙文艺; 李勇; 戴国权; 曾大生; 郭振超; 杨妙宜; 彭青
Original assignee: 广东明阳电气股份有限公司
Priority date: 2022-12-27
Filing date: 2023-03-13
Publication date: 2024-07-04

Abstract

Disclosed in the present invention are an outdoor box-type substation and a wind power system. The outdoor box-type substation comprises: a box body provided with a low-pressure chamber; a low-voltage assembly provided in the low-voltage chamber; a transformer assembly provided at the top of the box body, the transformer assembly being electrically connected to the low-voltage assembly; a high-voltage assembly provided on the box body, the transformer assembly being electrically connected to the high-voltage assembly; and an overhead wiring assembly provided at the top of the box body, the high-voltage assembly being electrically connected to the overhead wiring assembly, and the overhead wiring assembly being used for electrically connecting to an external power grid. Connecting the transformer assembly to the box body and eliminating the housing portion of a voltage transformation chamber help to reduce the overall size; and arranging the overhead wiring assembly at the top of the box body makes full use of the area of the top of the box body, thus reducing the occupied land area. Incorporating the structure of the overhead wiring assembly into the power grid helps to simplify wire outlet structures and reduce the construction complexity; and fully using the height of the box body for overhead wire outlet helps to conserve the usage of cables, thus reducing costs.

Description

An outdoor box-type substation and wind power system

Technical Field

The present invention relates to the field of transformer substations, and in particular to an outdoor box-type transformer substation and a wind power system.

Background technique

Box-type substation is a commonly used power transmission and distribution equipment, which is widely used in wind power projects. With the development of wind power generation technology, the capacity of wind turbines has increased, which has led to an increase in the capacity and volume of box-type substations, resulting in a large land area occupied by the installation of box-type substations. In addition, the existing box-type substations use cable lines for incoming and outgoing lines, which requires digging cable trenches and using a large number of cables, which is costly.

Summary of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an outdoor box-type substation and a wind power system, which can reduce the occupied land area, reduce the excavation of cable trenches and save the amount of cables used.

According to an embodiment of the first aspect of the present invention, an outdoor box-type substation includes: a box body, which is provided with a low-voltage chamber; a low-voltage component, which is arranged in the low-voltage chamber; a transformer assembly, which is connected to the box body, and the transformer assembly is electrically connected to the low-voltage component; a high-voltage component, which is arranged in the box body, and the transformer assembly is electrically connected to the low-voltage component; an overhead wiring assembly, which is arranged on the top of the box body, and the high-voltage assembly is electrically connected to the overhead wiring assembly, and the overhead wiring assembly is used to be electrically connected to an external power grid.

An outdoor box-type substation according to an embodiment of the present invention has at least the following beneficial effects: the low-voltage component is used to receive low-voltage electricity and transmit it to the transformer component, the transformer component transforms the low-voltage electricity into high-voltage electricity and transmits it to the high-voltage component, and the high-voltage component connects the high-voltage electricity to the power grid through the overhead wiring component. Connecting the transformer component to the box body and eliminating the transformer housing part is conducive to reducing the overall volume. The overhead wiring component is arranged on the top of the box body, which is conducive to making full use of the area on the top of the box body and reducing the occupied land area. At the same time, the structure of the overhead wiring component is adopted to be connected to the power grid, and there is no need to dig a cable trench to reduce the damage to the environment, which is conducive to simplifying the outgoing line structure and construction complexity, and making full use of the height of the box body for overhead outgoing lines, which is conducive to saving cable usage and reducing costs.

According to some embodiments of the present invention, the overhead wiring assembly includes three high-voltage wiring bushings disposed on the top of the box body, and the high-voltage assembly is electrically connected to the high-voltage wiring bushings.

According to some embodiments of the present invention, the high voltage assembly includes an inflatable circuit breaker module disposed on the top of the box body. The inflatable circuit breaker module is electrically connected to the transformer assembly and the high-voltage wiring bushing respectively.

According to some embodiments of the present invention, the inflatable circuit breaker module includes a shell, a vacuum circuit breaker, a disconnector and an incoming line bushing, the shell is connected to the top of the box body, the shell is provided with a cavity and a first connecting hole and a second connecting hole connected to the cavity, the vacuum circuit breaker and the disconnector are located in the cavity, the high-voltage wiring bushing is connected to the shell to block the first connecting hole, the incoming line bushing is connected to the shell to block the second connecting hole, the disconnector is electrically connected to the high-voltage wiring bushing and the vacuum circuit breaker, respectively, the vacuum circuit breaker is electrically connected to the transformer assembly through the incoming line bushing, and the cavity is filled with sulfur hexafluoride gas.

According to some embodiments of the present invention, the inflatable circuit breaker module further includes a mechanical interlocking mechanism, which is respectively connected to the vacuum circuit breaker and the isolating switch, and is used to limit the action sequence of the vacuum circuit breaker and the isolating switch.

According to some embodiments of the present invention, the inflatable circuit breaker module further includes a through-type current transformer disposed in the cavity, the through-type current transformer is provided with a detection hole, and the incoming bushing is partially disposed in the detection hole.

According to some embodiments of the present invention, the transformer assembly includes an oil-immersed transformer and a heat sink, the oil-immersed transformer is arranged on the top of the box, the heat sink is arranged on the side wall of the box, the oil-immersed transformer is connected to the heat sink, and the oil-immersed transformer is electrically connected to the low-voltage assembly and the incoming bushing, respectively.

According to some embodiments of the present invention, the transformer assembly further includes an outgoing bushing and a first connecting conductor, the outgoing bushing is disposed at the top of the box, the oil-immersed transformer is electrically connected to the outgoing bushing, and the outgoing bushing is connected to the incoming bushing via the first connecting conductor.

According to some embodiments of the present invention, it further includes a lightning arrester and a second connecting conductor which are arranged on the box body and correspond one to one with the high-voltage wiring bushing, and the high-voltage wiring bushing is electrically connected to the lightning arrester through the second connecting conductor.

According to the second aspect of the present invention, the wind power system comprises the above-mentioned outdoor box-type substation, and also comprises a wind turbine and a transmission cable. The wind turbine is electrically connected to the low-voltage component via the transmission cable, and the overhead wiring component is electrically connected to the external power grid.

The wind power system according to the embodiment of the present invention has at least the following beneficial effects: the wind turbine converts wind power into low-voltage electricity and transmits it to the low-voltage component via the transmission voltage; the low-voltage component transmits the low-voltage electricity to the transformer component; the transformer component transforms the low-voltage electricity into high-voltage electricity and transmits it to the high-voltage component; the high-voltage component connects the high-voltage electricity to the power grid through the overhead wiring component. Connecting the transformer component to the box and eliminating the transformer housing part is conducive to reducing the overall volume; the overhead wiring component is arranged on the top of the box, which is conducive to making full use of the area on the top of the box and reducing the occupied land area. At the same time, the structure of the overhead wiring component is adopted to connect to the power grid, and there is no need to dig a cable trench to reduce the damage to the environment, which is conducive to simplifying the outgoing line structure and construction complexity, and making full use of the height of the box for overhead outgoing lines is conducive to saving the use of cables and reducing costs.

Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

FIG1 is a schematic structural diagram of one embodiment of the present invention;

FIG2 is a top view of one embodiment of the present invention (the oil-immersed transformer and the heat sink are not shown);

FIG3 is a side view of one embodiment of the present invention (the arrester is not shown);

FIG. 4 is a partial cross-sectional view of a pneumatic circuit breaker module according to one embodiment of the present invention.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

As shown in Figures 1 to 4, an outdoor box-type substation according to an embodiment of the present invention includes: a box body 100, which is provided with a low-voltage chamber 110; a low-voltage component, which is arranged in the low-voltage chamber 110; a transformer assembly 200, which is arranged at the top of the box body 100, and the transformer assembly 200 is electrically connected to the low-voltage assembly; a high-voltage assembly, which is arranged at the box body 100, and the transformer assembly 200 is electrically connected to the low-voltage assembly; an overhead wiring assembly 300, which is arranged at the top of the box body 100, and the high-voltage assembly is electrically connected to the overhead wiring assembly 300, and the overhead wiring assembly 300 is used to be electrically connected to an external power grid.

An outdoor box-type substation according to an embodiment of the present invention has at least the following beneficial effects: the low-voltage component is used to receive low-voltage electricity and transmit it to the transformer component 200, the transformer component 200 transforms the low-voltage electricity into high-voltage electricity and transmits it to the high-voltage component, and the high-voltage component connects the high-voltage electricity to the power grid through the overhead wiring component 300. Connecting the transformer component 200 to the box 100 and eliminating the transformer housing part is conducive to reducing the overall volume. The overhead wiring component 300 is set on the top of the box 100, which is conducive to making full use of the area on the top of the box 100 and reducing the occupied land area. At the same time, the structure of the overhead wiring component 300 is used to connect to the power grid, without digging a cable trench to reduce damage to the environment, which is conducive to simplifying the outgoing line structure and construction complexity, and making full use of the height of the box 100 for overhead outgoing lines, which is conducive to saving cable usage and reducing costs.

Low-voltage components usually include low-voltage incoming line cabinets, low-voltage outgoing line cabinets, compensation cabinets, low-voltage circuit breakers, current transformers, ammeters, voltmeters and other devices and components.

1 to 4 , in some embodiments of the present invention, the overhead wiring assembly 300 includes three high-voltage wiring bushings 310 disposed on the top of the box 100 , and the high-voltage assembly is electrically connected to the high-voltage wiring bushings 310 .

Three high-voltage wiring bushings 310 are arranged on the top of the box 100. The high-voltage wiring bushings 310 are electrically connected to the three-phase transmission lines of the power grid one by one, respectively, so as to achieve the effect of connecting the overhead lines to the power grid. The structure is simple and easy to implement.

1 to 4 , in some embodiments of the present invention, the high voltage assembly includes a pneumatic circuit breaker module 400 disposed on the top of the box 100 , and the pneumatic circuit breaker module 400 is electrically connected to the transformer assembly 200 and the high voltage wiring bushing 310 , respectively.

The inflatable circuit breaker module 400 can make the internal working environment more stable through the inflatable structure, and can adapt to the complex and changeable outdoor environment. The inflatable structure can also improve the insulation performance, which is conducive to improving safety.

In some embodiments, the high voltage component may also include devices such as high voltage fuses.

1, 2 and 4, in some embodiments of the present invention, the inflatable circuit breaker module 400 includes a shell, a vacuum circuit breaker, a disconnector and an incoming line bushing 410, the shell is connected to the top of the box body 100, the shell is provided with a cavity and a first connection hole and a second connection hole connected to the cavity, the vacuum circuit breaker and the disconnector are located in the cavity, the high-voltage wiring bushing 310 is connected to the shell to block the first connection hole, the incoming line bushing 410 is connected to the shell to block the second connection hole, the disconnector is electrically connected to the high-voltage wiring bushing 310 and the vacuum circuit breaker, respectively, the vacuum circuit breaker is electrically connected to the transformer assembly 200 through the incoming line bushing 410, and the cavity is filled with sulfur hexafluoride gas.

The high-voltage wiring bushing 310 is inserted into the first connection hole and blocks the first connection hole. The isolating switch can be electrically connected to the external power grid through the high-voltage wiring bushing 310. The incoming line bushing 410 is inserted into the second connection hole and blocks the second connection hole. The vacuum circuit breaker is electrically connected to the transformer assembly 200 through the incoming line bushing 410, thereby achieving electrical connection while ensuring the sealing of the cavity. The vacuum circuit breaker and the isolating switch are located in a cavity filled with sulfur hexafluoride gas in the shell, which can make the vacuum circuit breaker The working environment of the vacuum circuit breaker and disconnector is more stable, the insulation between the vacuum circuit breaker and disconnector and the outside is improved, and the high-voltage safety is improved. Sulfur hexafluoride gas has excellent arc cooling characteristics, which is beneficial to avoid local overheating and extend the service life of the vacuum circuit breaker and disconnector.

In some embodiments of the present invention, the inflatable circuit breaker module 400 further includes a mechanical interlocking mechanism, which is respectively connected to the vacuum circuit breaker and the isolating switch, and is used to limit the action sequence of the vacuum circuit breaker and the isolating switch.

The mechanical interlocking mechanism is used to limit the action sequence of the vacuum circuit breaker and the disconnector, so that when the vacuum circuit breaker and the disconnector are both in the closed state, the vacuum circuit breaker needs to be disconnected before the disconnector is disconnected; when the vacuum circuit breaker and the disconnector are both in the disconnected state, the disconnector needs to be closed before the vacuum circuit breaker is closed. In this way, the standardization of operation can be ensured, faults caused by improper operation can be avoided, and reliability can be improved.

4 , in some embodiments of the present invention, the inflatable circuit breaker module 400 further includes a through-type current transformer 420 disposed in the cavity, the through-type current transformer 420 is provided with a detection hole 421 , and the incoming bushing 410 is partially penetrated in the detection hole 421 .

The incoming bushing 410 is inserted into the detection hole 421 of the through-type current transformer 420. The through-type current transformer 420 can sense the current flowing through the incoming bushing 410 and generate a corresponding induced current, thereby achieving the effect of current detection. The through-type current transformer 420 is arranged in the cavity. Since the cavity is filled with sulfur hexafluoride gas, the through-type current transformer 420 can work more stably.

1 , in some embodiments of the present invention, the transformer assembly 200 includes an oil-immersed transformer 210 and a heat sink 220, the oil-immersed transformer 210 is disposed on the top of the housing 100, the heat sink 220 is disposed on the side wall of the housing 100, the oil-immersed transformer 210 is connected to the heat sink 220, and the oil-immersed transformer 210 is electrically connected to the low-voltage assembly and the incoming bushing 410, respectively.

Since the oil-immersed transformer 210 is internally oil-immersed, the internal components such as the transformer coil are in a stable working environment, can adapt to the complex and changeable outdoor environment, and can protect the internal components from oxidation, extend the service life, and have the advantages of stable operation and long service life. The oil-immersed transformer 210 is connected to the heat sink 220, and the heat sink 220 can accelerate the heat dissipation speed of the oil-immersed transformer 210, which is conducive to reducing the operating temperature of the oil-immersed transformer 210, making the oil-immersed transformer 210 work more stably.

1 and 2 , in some embodiments of the present invention, the transformer assembly 200 further includes an outlet bushing 230 and a first connecting conductor 240 , the outlet bushing 230 is disposed at the top of the box body 100 , the oil-immersed transformer 210 is electrically connected to the outlet bushing 230 , and the outlet bushing 230 is connected to the incoming bushing 410 through the first connecting conductor 240 .

The oil-immersed transformer 210 is electrically connected to the vacuum circuit breaker through the outlet bushing 230, the first connecting conductor 240 and the incoming bushing 410. The outlet bushing 230 and the incoming bushing 410 are both located at the top of the box 100, which is convenient for connecting or removing the first connecting conductor 240 using the first connecting conductor 240, and is conducive to making full use of the top area of the box 100 and reducing the overall occupied land area.

1 and 2 , in some embodiments of the present invention, a lightning arrester 500 and a second connecting conductor 510 are provided on the box body 100 and correspond one to one with the high-voltage wiring bushing 310 , and the high-voltage wiring bushing 310 is electrically connected to the lightning arrester 500 through the second connecting conductor 510 .

By providing a lightning arrester 500 corresponding one-to-one to the high-voltage wiring bushing 310, the high-voltage wiring bushing 310 is electrically connected to the lightning arrester 500 through the second connecting conductor 510. The lightning arrester 500 can limit the current flowing through the high-voltage wiring bushing 310 when a high transient voltage is generated in situations such as lightning strikes, which is beneficial to protecting other devices from overcurrent damage and improving overall reliability.

1 , a wind power system according to an embodiment of the second aspect of the present invention includes the above-mentioned outdoor box-type substation, and also includes a wind turbine and a transmission cable. The wind turbine is electrically connected to the low-voltage component through the transmission cable, and the overhead wiring component 300 is electrically connected to the external power grid.

The wind turbine converts wind power into low-voltage electricity and transmits it to the low-voltage component through the transmission voltage. The low-voltage component transmits the low-voltage electricity to the transformer component 200. The transformer component 200 transforms the low-voltage electricity into high-voltage electricity and transmits it to the high-voltage component. The high-voltage component connects the high-voltage electricity to the power grid through the overhead wiring component 300. Connecting the transformer component 200 with the box 100 and eliminating the shell part of the transformer room is conducive to reducing the overall volume. The overhead wiring component 300 is set on the top of the box 100, which is conducive to making full use of the area on the top of the box 100 and reducing the occupied land area. At the same time, the structure of the overhead wiring component 300 is used to connect to the power grid, without digging a cable trench to reduce damage to the environment, which is conducive to simplifying the outgoing line structure and construction complexity, and making full use of the height of the box 100 for overhead outgoing lines, which is conducive to saving cable usage and reducing costs.

Low voltage electricity and high voltage electricity are only relative terms and do not specifically limit the voltage range.

The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Of course, the invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

An outdoor box-type substation, characterized by comprising:

The box body (100) is provided with a low-pressure chamber (110);

A low-pressure component is disposed in the low-pressure chamber (110);

A transformer assembly (200) is connected to the box (100), and the transformer assembly (200) is electrically connected to the low-voltage assembly;

A high-voltage component is arranged in the box (100), and the transformer component (200) is electrically connected to the low-voltage component;

An overhead wiring assembly (300) is arranged on the top of the box (100); the high-voltage assembly is electrically connected to the overhead wiring assembly (300); and the overhead wiring assembly (300) is used to be electrically connected to an external power grid.
An outdoor box-type substation according to claim 1, characterized in that: the overhead wiring assembly (300) includes three high-voltage wiring bushings (310) arranged on the top of the box body (100), and the high-voltage assembly is electrically connected to the high-voltage wiring bushings (310).
An outdoor box-type substation according to claim 2, characterized in that: the high-voltage component includes a pneumatic circuit breaker module (400) arranged on the top of the box body (100), and the pneumatic circuit breaker module (400) is electrically connected to the transformer component (200) and the high-voltage wiring bushing (310) respectively.
An outdoor box-type substation according to claim 3, characterized in that: the inflatable circuit breaker module (400) comprises a shell, a vacuum circuit breaker, a disconnector and an incoming line bushing (410), the shell is connected to the top of the box body (100), the shell is provided with a cavity and a first connection hole and a second connection hole communicated with the cavity, the vacuum circuit breaker and the disconnector are located in the cavity, the high-voltage wiring bushing (310) is connected to the shell to block the first connection hole, the incoming line bushing (410) is connected to the shell to block the second connection hole, the disconnector is electrically connected to the high-voltage wiring bushing (310) and the vacuum circuit breaker, respectively, the vacuum circuit breaker is electrically connected to the transformer assembly (200) through the incoming line bushing (410), and the cavity is filled with sulfur hexafluoride gas.
An outdoor box-type substation according to claim 4 is characterized in that: the inflatable circuit breaker module (400) also includes a mechanical interlocking mechanism, which is connected to the vacuum circuit breaker and the disconnector respectively, and the mechanical interlocking mechanism is used to limit the action sequence of the vacuum circuit breaker and the disconnector.
An outdoor box-type substation according to claim 4 is characterized in that: the inflatable circuit breaker module (400) also includes a through-type current transformer (420) arranged in the cavity, the through-type current transformer (420) is provided with a detection hole (421), and the incoming bushing (410) is partially penetrated in the detection hole (421).
According to claim 4, the outdoor box-type substation is characterized in that: the transformer assembly (200) includes an oil-immersed transformer (210) and a heat sink (220), and the oil-immersed transformer (210) is arranged in the box (100). The heat sink (220) is arranged on the side wall of the box (100), the oil-immersed transformer (210) is connected to the heat sink (220), and the oil-immersed transformer (210) is electrically connected to the low-voltage component and the incoming line bushing (410), respectively.
An outdoor box-type substation according to claim 7, characterized in that: the transformer assembly (200) further comprises an outgoing bushing (230) and a first connecting conductor (240), the outgoing bushing (230) is arranged on the top of the box body (100), the oil-immersed transformer (210) is electrically connected to the outgoing bushing (230), and the outgoing bushing (230) is connected to the incoming bushing (410) through the first connecting conductor (240).
An outdoor box-type substation according to claim 2 is characterized in that it also includes a lightning arrester (500) and a second connecting conductor (510) arranged on the box body (100) and corresponding to the high-voltage wiring bushing (310), and the high-voltage wiring bushing (310) is electrically connected to the lightning arrester (500) through the second connecting conductor (510).
A wind power system, characterized in that it includes an outdoor box-type substation as described in any one of claims 1 to 9, and also includes a wind turbine and a transmission cable, wherein the wind turbine is electrically connected to the low-voltage component via the transmission cable, and the overhead wiring component (300) is electrically connected to an external power grid.