CN116526347A

CN116526347A - Box-type substation and container

Info

Publication number: CN116526347A
Application number: CN202310392737.1A
Authority: CN
Inventors: 李风光; 潘海洋; 赵雅珠; 叶鹏; 顾恒
Original assignee: Huawei Digital Power Technologies Co Ltd
Current assignee: Huawei Digital Power Technologies Co Ltd
Priority date: 2023-03-15
Filing date: 2023-04-10
Publication date: 2023-08-01

Abstract

The invention provides a box-type transformer substation and a container. The box-type substation includes: the container comprises a medium-pressure chamber, and the medium-pressure chamber is formed by enclosing a stand column and a shell in the vertical direction so as to accommodate the medium-pressure cabinet. The side of well switch board is provided with and lets out the arc passageway, lets out the arc passageway and encloses to establish by stand, the side shell of well pressure chamber and the baffle that is located between the side of well switch board and the side shell of well pressure chamber and form, or, the back of well switch board is provided with lets out the arc passageway, lets out the arc passageway and encloses to establish by the back shell of well pressure chamber and the baffle that is located between the back shell of well switch board and the well switch board back and form, lets out the one end that the arc passageway is close to the well pressure chamber top and is provided with and lets out the arc mouth to outside guiding the electric arc to well pressure chamber. The box-type substation that this application provided has the function of letting out the arc certainly, consequently need not to set up solitary arc space that lets out on its foundation of perpendicular below, and then the foundation cost that has significantly reduced and time cost have improved box-type substation's security.

Description

Box-type substation and container

Technical Field

The application relates to the field of new energy power generation, in particular to a box-type transformer substation and a container.

Background

In the new energy power generation system, a box-type transformer substation integrates equipment such as a low-voltage cabinet, a transformer, a medium-voltage cabinet and an auxiliary power supply into a container with a steel structure, and a highly integrated power transformation and distribution solution is provided for a medium-voltage grid-connected scene of the new energy power generation system. However, with the rapid development of new energy power generation industry and the popularization of box-type substations, the safety of the new energy power generation industry is receiving more and more attention. When the medium-voltage cabinet of the box-type transformer substation has arcing faults, the electric arcs need to be discharged into a safety space so as to protect safety of equipment and operators. However, most of the existing arc discharge schemes are bound with the foundation of the box-type transformer substation, and if the foundation is not provided with an arc discharge space, the safety of equipment, installation personnel and maintenance personnel is difficult to ensure. In addition, the additional arrangement of the arc discharge space on the foundation can also cause the increase of the construction cost of the new energy power generation system, the construction time is prolonged, and the development of the large-scale new energy power generation system is not facilitated.

Disclosure of Invention

For solving the above-mentioned problem, this application embodiment provides a box-type substation, and this box-type substation need not to set up a special arc space that lets out at the ground, can in time let out the electric arc to the air when the middling pressure cabinet appears burning trouble, and then avoids electric arc threat equipment and relevant personnel's safety.

In a first aspect, embodiments of the present application provide a box-type substation comprising a container and a medium voltage cabinet. The container comprises a medium pressure chamber, and the medium pressure cabinet is arranged inside the medium pressure chamber. The medium pressure chamber is surrounded by the upright post and the shell in the vertical direction to form a containing space. The side of well switch board is provided with and lets out the arc passageway, let out the arc passageway and extend in the direction of height of well pressure chamber, let out the arc passageway and enclose by the stand, the side shell of well pressure chamber and the baffle that is located between the side of well pressure chamber and the side shell of well pressure chamber and establish and form, the one end that lets out the arc passageway and be close to well pressure chamber top is provided with lets out the arc mouth, and let out the arc mouth and set up on the side shell of well pressure chamber, or, the back of well pressure chamber is provided with lets out the arc passageway, let out the arc passageway and extend in the direction of height of well pressure chamber, let out the arc passageway and enclose by the back shell of well pressure chamber and the baffle that is located between the back shell of well pressure chamber and the back of well pressure chamber and establish, let out the one end that the arc passageway is close to well pressure chamber top and be provided with let out the arc mouth, and let out the arc mouth setting on the back shell of well pressure chamber. By the arrangement, when the arc leakage fault occurs in the medium-voltage cabinet, the electric arc can be guided into the arc leakage channel positioned on the side surface of the medium-voltage cabinet or the back surface of the medium-voltage cabinet, the electric arc can be sufficiently cooled in the upward spraying process, and the safety of the box-type transformer substation is improved.

In one possible implementation, the side of the medium-voltage cabinet, which is close to the partition plate, is provided with an arc guiding channel, which is connected with the arc discharging channel. By the arrangement, when the medium-voltage cabinet has an arc discharge fault, the electric arc can be timely guided into the arc discharge channel, and then the electric arc is prevented from damaging the internal equipment of the box-type substation.

In one possible implementation, a lifting seat is arranged vertically below the medium-voltage cabinet, and an arc guiding channel is arranged on one side, close to the partition plate, of the lifting seat and is connected with the arc discharging channel. By the arrangement, when the medium-voltage cabinet has an arc discharge fault, the electric arc can be timely guided into the arc discharge channel, and then the electric arc is prevented from damaging the internal equipment of the box-type substation. At the same time, as the lifting seat is positioned vertically below the medium-voltage cabinet, the conduction path of the electric arc is longer, and the electric arc can be cooled better.

In one possible implementation manner, a pressure relief turning plate is arranged at one end of the arc discharge opening, which is close to the ground, and the pressure relief turning plate is connected with one end of the arc discharge opening, which is close to the ground, through a limiting piece, and the limiting piece is used for enabling the pressure relief turning plate to be opened upwards at a certain angle. Through the setting of pressure release board that turns over, can prevent that the outside foreign matter of container from getting into and leaking the arc passageway, jam and leak the arc passageway when the arc trouble does not appear in the intermediate-voltage board. When the arc leakage fault occurs in the medium-voltage cabinet, the pressure release turning plate can be opened upwards only through the arrangement of the limiting piece, so that installation and maintenance personnel on the ground are prevented from being harmed when the electric arc is sprayed out, and the safety of the box-type transformer substation is improved.

In one possible implementation, a magnet is provided at an end of the arc discharge port remote from the ground, the magnet being used to magnetically attract the pressure relief flap. Through the setting of magnet, can not appear leaking when the arc trouble in the intermediate-voltage board for the pressure release turns over the board and is kept away from the one end on ground with leaking the arc mouth and be connected, and then makes the pressure release turn over the board and cover and leak the arc mouth, prevents that external foreign matter from getting into and leaking the arc passageway. When the medium-voltage cabinet has an arc leakage fault, the pressure released by the arc can enable the pressure release turning plate to break loose the constraint of the magnet, and then the arc is released to the outside of the box-type transformer substation.

In one possible implementation, the end of the arc discharge opening away from the ground is provided with a spring piece, the spring piece comprises a fixed end and a free end, the fixed end of the spring piece is connected with the end of the arc discharge opening away from the ground, and the other end of the spring piece can rotate around the fixed end of the spring piece. When the arc leakage fault does not occur in the medium-voltage cabinet, the elastic acting force of the free end of the spring piece can enable the pressure release turning plate to cover the arc leakage opening, so that external foreign matters are prevented from entering the arc leakage channel, and the arc is prevented from being released. When the medium-voltage cabinet has an arc leakage fault, the pressure released by the arc can enable the pressure release turning plate to break loose the elastic acting force of the spring piece, and then the arc is released to the outside of the box-type transformer substation.

In one possible implementation, a filter screen is arranged on the arc discharge port, and the filter screen is fixedly connected with the edge of the arc discharge port. The arrangement of the filter screen can prevent external foreign matters from leaking an arc channel when the arc-leaking turning plate is opened, namely, the arc-leaking turning plate is separated from one end of the arc-leaking opening, which is far away from the ground, so as to prevent the release of the arc.

In one possible implementation, the bottom of the arc discharge channel is provided with a water leakage hole. Through the arrangement of the water leakage holes, when the arc discharge turning plate is opened, namely, when the arc discharge turning plate is separated from one end of the arc discharge port, which is far away from the ground, rainwater is prevented from entering the arc discharge channel, so that the cooling path is shortened when the arc is released.

In one possible implementation, the partition, or the side housing of the medium pressure chamber, or the rear housing of the medium pressure chamber, is of a multilayer structure. Through setting up the side shell of baffle or middling pressure room or the back shell of middling pressure room to the structure of multilayer, can prevent to let out when the arc, electric arc breaks through and lets out the arc passageway, and then leads to the damage of box-type substation and installs the casualties of maintainer.

In a second aspect, the present application provides a container for housing a low-voltage cabinet, a transformer, and a medium-voltage cabinet, the low-voltage cabinet being connected to the medium-voltage cabinet by the transformer. The container comprises a medium-pressure chamber, wherein the medium-pressure chamber is surrounded by the upright post and the shell in the vertical direction to form a containing space for containing the medium-pressure cabinet. The side of the medium pressure chamber is provided with an arc discharge channel, the arc discharge channel extends in the height direction of the medium pressure chamber, the arc discharge channel is formed by enclosing a stand column, a side shell of the medium pressure chamber and a partition plate which is positioned in the medium pressure chamber and is opposite to the side shell of the medium pressure chamber, one end of the arc discharge channel, which is close to the top of the medium pressure chamber, is provided with an arc discharge port, and the arc discharge port is arranged on the side shell of the medium pressure chamber, or the back of the medium pressure chamber is provided with an arc discharge channel, the arc discharge channel extends in the height direction of the medium pressure chamber, the arc discharge channel is formed by enclosing a back shell of the medium pressure chamber and a partition plate which is positioned in the medium pressure chamber and is opposite to the back shell of the medium pressure chamber, one end of the arc discharge channel, which is close to the top of the medium pressure chamber, is provided with an arc discharge port, and the arc discharge port is arranged on the back shell of the medium pressure chamber. By the arrangement, when the arc leakage fault occurs in the medium-voltage cabinet, the electric arc can be guided into the arc leakage channel positioned on the side surface of the medium-voltage cabinet or the back surface of the medium-voltage cabinet, the electric arc can be sufficiently cooled in the upward spraying process, and the safety of the box-type transformer substation is improved.

In one possible implementation manner, a through hole is arranged on the partition board, the through hole is used for connecting the medium-voltage cabinet with the arc discharge channel, or a lifting seat is arranged under the medium-voltage cabinet, and the through hole is arranged on the partition board and is used for connecting the lifting seat with the arc discharge channel. By the arrangement, when the medium-voltage cabinet has an arc discharge fault, the electric arc can be timely guided into the arc discharge channel, and then the electric arc is prevented from damaging the internal equipment of the box-type substation.

In one possible implementation, the partition, or the side housing of the medium pressure chamber, or the rear housing of the medium pressure chamber, is of a multilayer structure. Through setting up the side shell of baffle or middling pressure room or the back shell of middling pressure room to the structure of multilayer, when can preventing to let out the arc, electric arc breaks through shell or the partition wall of container, and then leads to the damage of box-type substation and installs the casualties of maintainer.

In general, the independent arc discharging channel is designed for the box-type transformer substation and the container, so that additional arc discharging space is not required to be arranged on the foundation of the box-type transformer substation, and the capital construction cost and the time cost of the box-type transformer substation during installation are reduced. Meanwhile, the arc discharging channel provided by the application multiplexes the side surfaces of the container of the box-type substation, or the partition wall between the transformer and the medium-voltage cabinet in the box-type substation, so that the design is greatly simplified, and the material cost is saved. In addition, through the design of spacing piece and let out the arc and turn over the board, can make the electric arc that lets out only upwards spout, and then avoided the electric arc to hurt subaerial maintenance personal, also made the electric arc obtain better cooling.

Drawings

FIG. 1 is a networking schematic diagram of a photovoltaic power generation system;

fig. 2 is a schematic structural view of a box-type substation;

FIG. 3 is a schematic diagram of the front and side structure of a box-type substation;

fig. 4a is a front view of a box-type substation provided in the present application;

fig. 4b is a schematic structural diagram of an arc discharge port provided in the present application;

FIG. 4c is a schematic view of a spring plate according to the present disclosure;

fig. 4d is a bottom view of a box-type substation provided in the present application;

fig. 5a is a front view of a box-type substation provided in the present application;

fig. 5b is a bottom view of a box-type substation provided in the present application;

fig. 6a is a front view of a box-type substation provided in the present application;

fig. 6b is a bottom view of a box-type substation provided in the present application;

fig. 7a is a front view of a box-type substation provided in the present application;

fig. 7b is a bottom view of a box-type substation provided in the present application;

fig. 8a is a front view of a box-type substation provided in the present application;

FIG. 8b is a side view of a box-type substation provided herein;

fig. 8c is a bottom view of a box-type substation provided herein;

fig. 9a is a front view of a box-type substation provided in the present application;

Fig. 9b is a side view of a box-type substation provided herein;

fig. 9c is a bottom view of a box-type substation provided in the present application;

Detailed Description

The box-type substation is also called a preassembled substation or a preassembled substation, and is factory-prefabricated power distribution equipment in which high-voltage switching equipment, a power distribution transformer 20 and low-voltage power distribution equipment are integrated in a certain wiring manner. By integrating the low-voltage cabinet 30, the transformer 20, the medium-voltage cabinet 10 and other devices into a container 40 which is moisture-proof, dust-proof, rat-proof and movable, the installation and maintenance of the transformer substation can be facilitated. In the new energy power generation system, the box-type transformer substation is mainly used for converting low-voltage alternating current into medium-voltage alternating current, further conveying the medium-voltage alternating current to a next stage booster station, and finally merging the alternating current into a power grid.

Next, taking a photovoltaic power generation system as an example, the working scene of the box-type substation is introduced. Referring to fig. 1, fig. 1 is a networking schematic diagram of a photovoltaic power generation system. The photovoltaic module converts solar energy into direct current through photovoltaic effect, and the inverter converts the direct current input by the photovoltaic module into alternating current and further sends the alternating current to the box-type transformer substation through the junction box. The low-voltage cabinets 30 of the box-type substation collect low-voltage ac power output by the respective photovoltaic inverters and transmit the collected low-voltage ac power to the transformer 20, the transformer 20 converts the low-voltage ac power into medium-voltage ac power, and the medium-voltage cabinet 10 further transmits the medium-voltage ac power to a booster station or a power grid.

Specifically, referring to fig. 2, fig. 2 is a schematic structural view of a box-type substation in which a low-voltage cabinet 30 and a medium-voltage cabinet 10 are connected by a transformer 20. The medium-voltage cabinet 10 is also called a ring main unit, and is an electrical device formed by installing a group of power transmission and distribution equipment (high-voltage switch equipment) in a metal or nonmetal insulation cabinet or assembling a spacing ring main power supply unit. An auxiliary distribution box 12 is provided at a position on the side of the medium voltage cabinet 10, and is mainly used for accommodating switches for controlling secondary equipment and auxiliary equipment. An auxiliary transformer 12 is arranged at a position of the side surface of the medium voltage cabinet 10, and is mainly used for providing power for secondary equipment in a box-type transformer substation, such as smoke sensing equipment, lighting equipment and the like.

Currently, for the arcing fault problem of the medium voltage cabinet 10, the industry generally needs to provide an additional arcing space 51 on the foundation 50 vertically below it. Specifically, referring to fig. 3, fig. 3 is a scheme of arcing and discharging a medium voltage cabinet 10 commonly used in the industry, wherein the medium voltage cabinet 10 includes a gas box 102 and a mechanism chamber 103, and primary components and insulating gas (not shown in the figure) are further disposed in the gas box 102. A secondary chamber 101 is provided above the medium-voltage cabinet 10, and a cable chamber 104 and a lifting seat 105 are provided below the medium-voltage cabinet 10 in this order. The foundation 50 vertically below the elevating seat 105 is provided with a concave arc discharge space 51. When the medium voltage cabinet 10 has an arcing fault and generates an arc, the gas tank 102 or the cable chamber 104 releases the arc from top to bottom into the arc discharge space 51 of the foundation 50 to receive and cool the arc for the purpose of protecting equipment and operators. That is, the container 40 itself in the arc discharging scheme does not have the capability of discharging an arc, and when the medium voltage cabinet 10 has an arc burning fault, the arc can be prevented from jeopardizing the safety of equipment and maintenance personnel only when the arc discharging space 51 is provided at the foundation 50 vertically below the medium voltage cabinet 10. Therefore, the scheme has higher requirement on the infrastructure, has poorer practicability and is difficult to meet the safety requirements under different installation scenes.

To this end, the present application provides several box substations that can achieve arc discharge and cooling without having to cooperate with the foundation 50.

Embodiment one:

referring to fig. 4a, fig. 4a is a front view of a box-type substation provided herein, wherein the box-type substation includes a low-voltage cabinet 30, a transformer 20, a medium-voltage cabinet 10, and a container 40, the low-voltage cabinet 30 and the medium-voltage cabinet 10 are disposed at both ends inside the container 40, and the transformer 20 is disposed between the low-voltage cabinet 30 and the medium-voltage cabinet 10. Further, the container 40 includes a housing (not shown) and a column 41.

Specifically, the medium-voltage cabinet 10 includes a secondary chamber 101, an air box 102, a mechanism chamber 103, and a cable chamber 104, and a lifting seat 105 is provided below the medium-voltage cabinet 10. The secondary chamber 101, i.e., the secondary device chamber, is mainly used for accommodating secondary devices such as a relay protection device, a terminal, a temperature and humidity controller, a heating plate, and the like. The gas box 102 is a device in which a primary member is sealed with an insulating gas. The mechanism chamber 103 is a compartment for the operating mechanism of the circuit breaker and the load switch. The medium voltage cabinet 10 is mounted close to the a-side of the container 40, that is, the distance between the medium voltage cabinet 10 and the B-side of the container 40 is greater than the distance between the medium voltage cabinet 10 and the a-side of the container 40. A partition 42 is also provided between the medium voltage cabinet 10 and the a-side of the container 40, the partition 42 further forming an arc discharge channel 43 with the outer shell 46 of the a-side of the container 40 and the upright 41. The side of the lifting seat 105 adjacent to the a-face of the container 40 is provided with an arc guiding channel 106. When the medium voltage switchgear 10 fails in arcing, the arc is discharged down into the elevating seat 105 through the gas box 102 or the cable chamber 104, and is guided into the arc discharge passage 43 through the arc guide passage 106. By providing the arc guiding channel 106 on the lifting seat 105, the space for arc discharge can be increased, and the arc can be cooled better.

Further, referring to fig. 4b, fig. 4b is a schematic structural view of the arc discharge passage 43. Wherein, the top of the arc discharging channel 43, that is, the top of the A surface of the container 40, is also provided with an arc discharging opening 44, one end of the arc discharging opening 44 close to the ground is also provided with an arc discharging turning plate 45, and the arc discharging turning plate 45 is connected with one end of the arc discharging opening 44 close to the ground through a limiting piece 444. The limiting piece 444 is used for enabling the arc discharging turning plate 45 to be opened upwards by a fixed angle, so that the arc is ensured to be sprayed into the air upwards. By the arrangement, the leaked electric arc can be far away from the bottom surface as far as possible, so that the electric arc can be cooled better, and the leaked electric arc is prevented from injuring maintenance personnel on the ground.

Further, a filter screen 443 may be added at the arc discharge port 44, and the material of the filter screen 443 may be steel, copper, aluminum, or aluminum alloy, which is not limited in this application. By the provision of the screen 443, foreign matter can be prevented from entering the arc discharge passage 43, thereby better cooling the arc.

Further, a magnetic attraction device 442 is further disposed at an end of the arc discharge port 44 away from the ground, the magnetic attraction device 442 can magnetically attract an end of the arc discharge flap 45 away from the ground, so that the arc discharge flap 45 is attached to the arc discharge port 44 when no arc exists in the arc discharge channel 43, that is, the arc discharge flap 45 is kept in a closed state, and further foreign matters are prevented from entering the arc discharge channel 43, and when an arc occurs in the arc discharge channel 43, the arc discharge flap 45 is separated from the magnetic attraction device 442 due to an acting force generated by the arc, that is, the arc discharge flap 45 is turned into an open state, and then the arc is discharged into the air.

In addition, an elastic limiting member, i.e., a spring piece 441, may be provided at an end of the arc discharge port 44 remote from the ground. As shown in fig. 4c, the first end of the spring piece 441 is a fixed end, and is connected to an end of the arc discharge port 44 away from the ground, and the second end of the spring piece 441 is a free end, so that rotation can be realized based on elastic force. The second end of the spring piece 441 may be a curved structure or a flat plate structure, which is not limited in this application. When the medium-voltage cabinet 10 does not have arcing fault, the second end of the spring piece 441 causes the arc discharge turning plate 45 to be attached to the arc discharge port 44 based on elastic force, so as to prevent foreign matters from entering the arc discharge channel 43. When the medium-voltage cabinet 10 has arcing fault, the acting force generated by the arc is larger than the elastic acting force of the spring piece 441, so that the arc discharge turning plate 45 is opened, and the arc is discharged into the air.

Further, the a-side of the container 40 is designed with a double-layer plate, or a multi-layer plate, or a thick plate, to prevent deformation or damage of the a-side of the container 40 caused by arc direct injection. Alternatively, only the partial area of the a-side of the container 40 constituting the arc discharge passage 43 is designed with a double-layer board, or a multi-layer board, or a thick board is added, thereby saving material costs and simplifying the manufacturing process.

Further, referring to fig. 4d, fig. 4d is a bottom view of the box-type substation, a water leakage hole 47 is formed at the bottom of the arc discharging channel 43, that is, at one end of the arc discharging channel 43 close to the ground, so as to prevent water accumulation in the arc discharging channel 43 and reduce the cooling path of the arc in the arc discharging channel 43. At the same time, a closing plate 1051 is provided at the bottom of the lifting base 105, thereby preventing the arc from being released from the bottom of the lifting base 105, and endangering the safety of equipment and maintenance personnel. Wherein, can set up the shrouding 1051 of rising seat 105 bottom into bilayer structure, multilayer structure, perhaps thickening structure etc. and then prevent better that the electric arc from rising seat 105's bottom release, improve box-type substation's security. In addition, as shown in fig. 4d, besides the sealing plate 1051 is disposed on the bottom surface of the lifting seat 105, a wire inlet 1052 is disposed on the bottom surface of the lifting seat 105 near the side of the C-plane of the container 40, so as to facilitate routing, and meanwhile, the space for installing the cable can be increased by such arrangement.

Embodiment two:

referring to fig. 5a, fig. 5a is a front view of a box-type substation provided in the present application. Unlike the first embodiment, in this embodiment, the arc chute 106 is provided on a side of the medium voltage cabinet 10 adjacent to the a-side of the container 40. That is, the arc guiding passage 106 is provided on the medium pressure chamber, not on the elevating seat 105.

Specifically, the medium-voltage cabinet 10 includes a secondary chamber 101, an air box 102, a mechanism chamber 103, and a cable chamber 104, and a lifting seat 105 is provided below the medium-voltage cabinet 10. The secondary chamber 101, i.e., the secondary device chamber, is mainly used for accommodating secondary devices such as a relay protection device, a terminal, a temperature and humidity controller, a heating plate, and the like. The gas box 102 is a device in which a primary member is sealed with an insulating gas. The mechanism chamber 103 is a compartment for the operating mechanism of the circuit breaker and the load switch. The medium voltage cabinet 10 is mounted close to the a-side of the container 40, that is, the distance between the medium voltage cabinet 10 and the B-side of the container 40 is greater than the distance between the medium voltage cabinet 10 and the a-side of the container 40. A partition 42 is also provided between the medium voltage cabinet 10 and the a-side of the container 40, the partition 42 further forming an arc discharge channel 43 with the outer shell 46 of the a-side of the container 40 and the upright 41. The side of the medium voltage cabinet 10 adjacent to the a-side of the container 40 is provided with an arc guiding channel 106. At this time, the side of the medium voltage cabinet is perforated to connect the arc guiding passage 106. When the medium voltage cabinet 10 fails in arcing, the arc is discharged down to the floor of the medium voltage cabinet 10 through the gas box 102 or the cable chamber 104, and is guided into the arc discharge passage 43 through the arc guide passage 106.

In addition, an elastic limiting member, i.e., a spring piece 441, may be provided at an end of the arc discharge port 44 remote from the ground. As shown in fig. 4c, the first end of the spring piece 441 is a fixed end, and is connected to an end of the arc discharge port 44 away from the ground, and the second end of the spring piece 441 is a free end, so that rotation can be realized based on elastic force. When the medium-voltage cabinet 10 does not have arcing fault, the second end of the spring piece 441 causes the arc discharge turning plate 45 to be attached to the arc discharge port 44 based on elastic force, so as to prevent foreign matters from entering the arc discharge channel 43. When the medium-voltage cabinet 10 has arcing fault, the acting force generated by the arc is larger than the elastic acting force of the spring piece 441, so that the arc discharge turning plate 45 is opened, and the arc is discharged into the air.

Further, referring to fig. 5b, fig. 5b is a bottom view of the box-type substation, and a water leakage hole 47 is formed at the bottom of the arc discharging channel 43, that is, at one end of the arc discharging channel 43 close to the ground, so as to prevent water accumulation in the arc discharging channel 43 and reduce the cooling path of the arc in the arc discharging channel 43. At the same time, a sealing plate 1001 is provided at the bottom of the medium-voltage cabinet 10, thereby preventing the arc from being released from the bottom of the medium-voltage cabinet 10, and endangering safety of equipment and maintenance personnel. Wherein, can set up the shrouding 1001 of middling pressure cabinet 10 bottom into bilayer structure, multilayer structure, perhaps thickening structure etc. and then prevent the electric arc from releasing from the bottom of middling pressure cabinet 10 better, improve box-type substation's security. In addition, as shown in fig. 5b, besides the sealing plate 1001 is disposed on the bottom surface of the intermediate voltage cabinet 10, a wire inlet 1002 is disposed on the bottom surface of the intermediate voltage cabinet 10 near the side of the C-plane of the container 40, so as to facilitate routing.

Embodiment III:

referring to fig. 6a, fig. 6a is a front view of a box-type substation provided in the present application. Unlike the first embodiment, in this embodiment, the medium voltage cabinet 10 is disposed on a side close to the B side of the container 40.

Specifically, the medium-voltage cabinet 10 includes a secondary chamber 101, an air box 102, a mechanism chamber 103, and a cable chamber 104, and a lifting seat 105 is provided below the medium-voltage cabinet 10. The secondary chamber 101, i.e., the secondary device chamber, is mainly used for accommodating secondary devices such as a relay protection device, a terminal, a temperature and humidity controller, a heating plate, and the like. The gas box 102 is a device in which a primary member is sealed with an insulating gas. The mechanism chamber 103 is a compartment for the operating mechanism of the circuit breaker and the load switch. The medium voltage cabinet 10 is mounted close to the B-side of the container 40, that is, the distance between the medium voltage cabinet 10 and the a-side of the container 40 is greater than the distance between the medium voltage cabinet 10 and the B-side of the container 40. A partition 42 is further provided between the medium voltage cabinet 10 and the B-side of the container 40, the partition 42 further forming an arc discharge channel 43 with the outer shell 48 of the B-side of the container 40 and the upright 41. The side of the lifting seat 105 adjacent to the B-side of the container 40 is provided with an arc guiding channel 106. When the medium voltage switchgear 10 fails in arcing, the arc is discharged down into the elevating seat 105 through the gas box 102 or the cable chamber 104, and is guided into the arc discharge passage 43 through the arc guide passage 106. By providing the arc guiding channel 106 on the lifting seat 105, the space for arc discharge can be increased, and the arc can be cooled better.

Further, referring to fig. 4b, fig. 4b is a schematic structural view of the arc discharge passage 43. Wherein, the top of the arc discharging channel 43, that is, the top of the B surface of the container 40, is also provided with an arc discharging opening 44, one end of the arc discharging opening 44 close to the ground is also provided with an arc discharging turning plate 45, and the arc discharging turning plate 45 is connected with one end of the arc discharging opening 44 close to the ground through a limiting piece 444. The limiting piece 444 is used for enabling the arc discharging turning plate 45 to be opened upwards by a fixed angle, so that the arc is ensured to be sprayed into the air upwards. By the arrangement, the leaked electric arc can be far away from the bottom surface as far as possible, so that the electric arc can be cooled better, and the leaked electric arc is prevented from injuring maintenance personnel on the ground.

Further, the B-side of the container 40 is designed with a double-layer board, or a multi-layer board, or a thick plate, to prevent deformation or damage of the B-side of the container 40 caused by arc direct injection. Alternatively, only the partial area of the B-side of the container 40 constituting the arc discharge passage 43 is designed with a double-layer board, or a multi-layer board, or a thick board is added, thereby saving material costs and simplifying the manufacturing process.

Further, referring to fig. 6b, fig. 6b is a bottom view of the box-type substation, and a water leakage hole 47 is formed at the bottom of the arc discharging channel 43, that is, at one end of the arc discharging channel 43 close to the ground, so as to prevent water accumulation in the arc discharging channel 43 and reduce the cooling path of the arc in the arc discharging channel 43. At the same time, a closing plate 1051 is provided at the bottom of the lifting base 105, thereby preventing the arc from being released from the bottom of the lifting base 105, and endangering the safety of equipment and maintenance personnel. Wherein, can set up the shrouding 1051 of rising seat 105 bottom into bilayer structure, multilayer structure, perhaps thickening structure etc. and then prevent better that the electric arc from rising seat 105's bottom release, improve box-type substation's security. In addition, as shown in fig. 6b, besides the sealing plate 1051 is disposed on the bottom surface of the lifting seat 105, a wire inlet 1052 is disposed on the bottom surface of the lifting seat 105 near the side of the C-plane of the container 40, so as to facilitate routing.

Embodiment four:

referring to fig. 7a, fig. 7a is a front view of a box-type substation provided in the present application. Unlike the second embodiment, in the present embodiment, the medium-voltage cabinet 10 is disposed on one side near the B-side of the container 40.

Specifically, the medium-voltage cabinet 10 includes a secondary chamber 101, an air box 102, a mechanism chamber 103, and a cable chamber 104, and a lifting seat 105 is provided below the medium-voltage cabinet 10. The secondary chamber 101, i.e., the secondary device chamber, is mainly used for accommodating secondary devices such as a relay protection device, a terminal, a temperature and humidity controller, a heating plate, and the like. The gas box 102 is a device in which a primary member is sealed with an insulating gas. The mechanism chamber 103 is a compartment for the operating mechanism of the circuit breaker and the load switch. The medium voltage cabinet 10 is mounted close to the B-side of the container 40, that is, the distance between the medium voltage cabinet 10 and the a-side of the container 40 is greater than the distance between the medium voltage cabinet 10 and the B-side of the container 40. A partition 42 is further provided between the medium voltage cabinet 10 and the B-side of the container 40, the partition 42 further forming an arc discharge channel 43 with the outer shell 48 of the B-side of the container 40 and the upright 41. The side of the medium voltage cabinet 10 adjacent to the B-side of the container 40 is provided with an arc guiding channel 106. At this time, the side of the medium voltage cabinet is perforated to connect the arc guiding passage 106. When the medium voltage cabinet 10 fails in arcing, the arc is discharged down to the floor of the medium voltage cabinet 10 through the gas box 102 or the cable chamber 104, and is guided into the arc discharge passage 43 through the arc guide passage 106.

Further, referring to fig. 7b, fig. 7b is a bottom view of the box-type substation, and a water leakage hole 47 is formed at the bottom of the arc discharging channel 43, that is, at one end of the arc discharging channel 43 close to the ground, so as to prevent water accumulation in the arc discharging channel 43 and reduce the cooling path of the arc in the arc discharging channel 43. At the same time, a closing plate is provided at the bottom of the medium-voltage cabinet 10, thereby preventing the electric arc from being released from the bottom of the medium-voltage cabinet 10, and endangering the safety of equipment and maintenance personnel. Wherein, can set up the shrouding 1001 of middling pressure cabinet 10 bottom into bilayer structure, multilayer structure, perhaps thickening structure etc. and then prevent the electric arc from releasing from the bottom of middling pressure cabinet 10 better, improve box-type substation's security. In addition, as shown in fig. 7b, besides the sealing plate 1001 is disposed on the bottom surface of the intermediate voltage cabinet 10, a wire inlet 1002 is disposed on the bottom surface of the intermediate voltage cabinet 10 near the side of the C-plane of the container 40, so as to facilitate routing.

Fifth embodiment:

referring to fig. 8a, fig. 8a is a front view of a box-type substation provided in the present application. Unlike the first embodiment, in the present embodiment, the arc discharging passage 43 is provided on a side of the medium voltage cabinet 10 close to the transformer 20, i.e., a D-side of the container 40. Specifically, referring to fig. 8B, fig. 8B is a top view of a box-type substation provided in the present application, wherein the sides of the medium voltage cabinet 10 in the horizontal direction are the a-plane of the container 40, the B-plane of the container 40, the C-plane of the container 40, and the D-plane of the container 40, respectively. The D-side of the container 40 is disposed opposite to the C-side of the container 40, and the D-side of the container 40 is closer to the transformer 20, that is, the medium voltage cabinet 10 can be isolated from the transformer 20 by the D-side of the container 40. In practice, the D-side of the container 40 is also known as a partition wall. It should be noted that the D-side of the container 40 may not be parallel to the C-side of the container 40.

Specifically, the medium-voltage cabinet 10 includes a secondary chamber 101, an air box 102, a mechanism chamber 103, and a cable chamber 104, and a lifting seat 105 is provided below the medium-voltage cabinet 10. The secondary chamber 101, i.e., the secondary device chamber, is mainly used for accommodating secondary devices such as a relay protection device, a terminal, a temperature and humidity controller, a heating plate, and the like. The gas box 102 is a device in which a primary member is sealed with an insulating gas. The mechanism chamber 103 is a compartment for the operating mechanism of the circuit breaker and the load switch. The medium voltage cabinet 10 is mounted close to the D-face of the container 40, that is, the distance between the medium voltage cabinet 10 and the D-face of the container 40 is greater than the distance between the medium voltage cabinet 10 and the C-face of the container 40. A bulkhead 42 is also provided between the medium voltage cabinet 10 and the D-side of the container 40, the bulkhead 42 further forming an arc chute 43 with a housing 49 of the D-side of the container 40. The side of the lifting seat 105 near the D-face of the container 40 is provided with an arc guiding channel 106. When the medium voltage switchgear 10 fails in arcing, the arc is discharged down into the elevating seat 105 through the gas box 102 or the cable chamber 104, and is guided into the arc discharge passage 43 through the arc guide passage 106. By providing the arc guiding channel 106 on the lifting seat 105, the space for arc discharge can be increased, and the arc can be cooled better.

Further, referring to fig. 8a, fig. 8a is a schematic structural view of the arc discharge passage 43. Wherein, the top of the arc discharging channel 43, that is, the top of the D surface of the container 40, is also provided with an arc discharging opening 44, one end of the arc discharging opening 44 close to the ground is also provided with an arc discharging turning plate 45, and the arc discharging turning plate 45 is connected with one end of the arc discharging opening 44 close to the ground through a limiting piece 444. The limiting piece 444 is used for enabling the arc discharging turning plate 45 to be opened upwards by a fixed angle, so that the arc is ensured to be sprayed into the air upwards. By the arrangement, the leaked electric arc can be far away from the bottom surface as far as possible, so that the electric arc can be cooled better, and the leaked electric arc is prevented from injuring maintenance personnel on the bottom surface.

Further, the D-side of the container 40 is designed with a double-layer board, or a multi-layer board, or a thick plate, to prevent deformation or damage of the D-side of the container 40 caused by arc direct injection. Alternatively, only the partial area of the D-face of the container 40 constituting the arc discharge passage 43 is designed with a double-layer board, or a multi-layer board, or a thick board is added, thereby saving material costs and simplifying the manufacturing process.

Further, referring to fig. 8c, fig. 8c is a bottom view of the box-type substation, and a water leakage hole 47 is formed at the bottom of the arc discharging channel 43, that is, at one end of the arc discharging channel 43 close to the ground, so as to prevent water accumulation in the arc discharging channel 43 and reduce the cooling path of the arc in the arc discharging channel 43. At the same time, a closing plate 1051 is provided at the bottom of the lifting base 105, thereby preventing the arc from being released from the bottom of the lifting base 105, and endangering the safety of equipment and maintenance personnel. Wherein, can set up the shrouding 1051 of rising seat 105 bottom into bilayer structure, multilayer structure, perhaps thickening structure etc. and then prevent better that the electric arc from rising seat 105's bottom release, improve box-type substation's security. In addition, as shown in fig. 8C, besides the sealing plate 1051 is disposed on the bottom surface of the lifting seat 105, a wire inlet 1052 is disposed on the bottom surface of the lifting seat 105 near the side of the C-plane of the container 40, so as to facilitate routing. Notably, in the bottom view of the box-type substation shown in fig. 8c, the medium voltage cabinet 10 is mounted next to the a-side of the container 40, except for the D-side of the container 40, the medium voltage cabinet 10 being mounted next to the a-side of the container 40. However, in practical applications, the positional relationship between the medium-voltage cabinet 10 and the a-side or the B-side is not limited, that is, the medium-voltage cabinet 10 may be installed close to the B-side of the container 40, or the distances between the medium-voltage cabinet 10 and the a-side of the container 40 and the B-side of the container 40 may be equal.

Example six:

referring to fig. 9a, fig. 9a is a front view of a box-type substation provided in the present application. Unlike the second embodiment, in the present embodiment, the arc discharging passage 43 is provided on a side of the medium voltage cabinet 10 close to the transformer 20, i.e., a D-side of the container 40. Specifically, referring to fig. 9B, fig. 9B is a top view of a box-type substation provided in the present application, wherein the sides of the medium voltage cabinet 10 in the horizontal direction are the a-plane of the container 40, the B-plane of the container 40, the C-plane of the container 40, and the D-plane of the container 40, respectively. The D-side of the container 40 is disposed opposite to the C-side of the container 40, and the D-side of the container 40 is closer to the transformer 20, that is, the medium voltage cabinet 10 can be isolated from the transformer 20 by the D-side of the container 40. In practice, the D-side of the container 40 is also known as a partition wall. It should be noted that the D-side of the container 40 may not be parallel to the C-side of the container 40.

Specifically, the medium-voltage cabinet 10 includes a secondary chamber 101, an air box 102, a mechanism chamber 103, and a cable chamber 104, and a lifting seat 105 is provided below the medium-voltage cabinet 10. The secondary chamber 101, i.e., the secondary device chamber, is mainly used for accommodating secondary devices such as a relay protection device, a terminal, a temperature and humidity controller, a heating plate, and the like. The gas box 102 is a device in which a primary member is sealed with an insulating gas. The mechanism chamber 103 is a compartment for the operating mechanism of the circuit breaker and the load switch. The medium voltage cabinet 10 is mounted close to the D-face of the container 40, that is, the distance between the medium voltage cabinet 10 and the D-face of the container 40 is greater than the distance between the medium voltage cabinet 10 and the C-face of the container 40. A bulkhead 42 is also provided between the medium voltage cabinet 10 and the D-side of the container 40, the bulkhead 42 further forming an arc chute 43 with a housing 49 of the D-side of the container 40. The side of the medium voltage cabinet 10 adjacent to the D-face of the container 40 is provided with an arc guiding channel 106. At this time, the side of the medium voltage cabinet 10 adjacent to the container 40 is perforated to be connected with the arc guiding passage 106. When the medium voltage cabinet 10 fails in arcing, the arc is discharged down to the floor of the medium voltage cabinet 10 through the gas box 102 or the cable chamber 104, and is guided into the arc discharge passage 43 through the arc guide passage 106.

Further, referring to fig. 8a, fig. 8a is a schematic structural view of the arc discharge passage 43. Wherein, the top of the arc discharging channel 43, that is, the top of the D surface of the container 40, is also provided with an arc discharging opening 44, one end of the arc discharging opening 44 close to the ground is also provided with an arc discharging turning plate 45, and the arc discharging turning plate 45 is connected with one end of the arc discharging opening 44 close to the ground through a limiting piece 444. The limiting piece 444 is used for enabling the arc discharging turning plate 45 to be opened upwards by a fixed angle, so that the arc is ensured to be sprayed into the air upwards. By the arrangement, the leaked electric arc can be far away from the bottom surface as far as possible, so that the electric arc can be cooled better, and the leaked electric arc is prevented from injuring maintenance personnel on the ground.

Further, referring to fig. 9c, fig. 9c is a bottom view of the box-type substation, and a water leakage hole 47 is formed at the bottom of the arc discharging channel 43, that is, at one end of the arc discharging channel 43 close to the ground, so as to prevent water accumulation in the arc discharging channel 43 and reduce the cooling path of the arc in the arc discharging channel 43. At the same time, a sealing plate 1001 is provided at the bottom of the medium-voltage cabinet 10, thereby preventing the arc from being released from the bottom of the medium-voltage cabinet 10, and endangering safety of equipment and maintenance personnel. Wherein, can set up the shrouding 1001 of middling pressure cabinet 10 bottom into bilayer structure, multilayer structure, perhaps thickening structure etc. and then prevent the electric arc from releasing from the bottom of middling pressure cabinet 10 better, improve box-type substation's security. In addition, as shown in fig. 9C, besides the sealing plate 1001 is disposed on the bottom surface of the intermediate voltage cabinet 10, a wire inlet 1002 is disposed on the bottom surface of the intermediate voltage cabinet 10 near the side of the C-plane of the container 40, so as to facilitate routing. Notably, in the bottom view of the box-type substation shown in fig. 9c, the medium voltage cabinet 10 is mounted next to the a-side of the container 40, except for the D-side of the container 40, the medium voltage cabinet 10 being mounted next to the a-side of the container 40. However, in practical applications, the positional relationship between the medium-voltage cabinet 10 and the a-side or the B-side is not limited, that is, the medium-voltage cabinet 10 may be installed close to the B-side of the container 40, or the distances between the medium-voltage cabinet 10 and the a-side of the container 40 and the B-side of the container 40 may be equal.

In general, the present application designs an independent arc discharging channel 43 for a box-type substation, so that an additional arc discharging space 51 is not required to be provided on the foundation 50 of the box-type substation, thereby reducing the capital cost and time cost of the box-type substation during installation. Meanwhile, the arc discharging channel 43 provided by the application multiplexes the side surfaces of the container 40 of the box-type transformer substation, or the partition wall between the transformer 20 and the medium-voltage cabinet 10 in the box-type transformer substation, thereby greatly simplifying the design and saving the material cost. In addition, through the design of the limiting piece 444 and the arc discharging turning plate 45, the discharged arc can be only sprayed upwards, so that the arc is prevented from damaging maintenance personnel on the ground, and the arc is cooled better.

The foregoing detailed description of the invention has been presented for purposes of illustration and description, and it should be understood that the foregoing is by way of illustration and description only, and is not intended to limit the scope of the invention.

Claims

1. A box-type substation, characterized in that it comprises a container and a medium voltage cabinet;

the container comprises a medium-pressure chamber, and the medium-pressure cabinet is arranged inside the medium-pressure chamber;

the medium-pressure chamber is surrounded by the upright post and the shell in the vertical direction to form a containing space;

the side face of the medium-voltage cabinet is provided with an arc discharge channel, the arc discharge channel extends in the height direction of the medium-voltage chamber, the arc discharge channel is formed by enclosing the upright post, a side face shell of the medium-voltage chamber and a partition plate positioned between the side face of the medium-voltage cabinet and the side face shell of the medium-voltage chamber, one end, close to the top of the medium-voltage chamber, of the arc discharge channel is provided with an arc discharge port, and the arc discharge port is arranged on the side face shell of the medium-voltage chamber; or alternatively, the process may be performed,

the back of middling pressure cabinet is provided with let out the arc passageway, let out the arc passageway and be in extend in the direction of height of middling pressure room, let out the arc passageway by middling pressure room's back shell and be located middling pressure cabinet's back shell with the baffle between the middling pressure cabinet back encloses and establishes and form, let out the arc passageway and be close to the one end at middling pressure room top is provided with lets out the arc mouth, just let out the arc mouth setting and be in on the back shell of middling pressure room.

2. The box-type substation according to claim 1, wherein an arc guiding channel is arranged on one side of the medium voltage cabinet, which is close to the partition board, and the arc guiding channel is connected with the arc discharging channel.

3. The box-type substation according to claim 1, wherein a lifting seat is arranged vertically below the medium-voltage cabinet, an arc guiding channel is arranged on one side, close to the partition board, of the lifting seat, and the arc guiding channel is connected with the arc discharging channel.

4. A box-type substation according to claim 2 or 3, wherein a pressure relief flap is arranged at one end of the arc discharge opening close to the ground, the pressure relief flap is connected with one end of the arc discharge opening close to the ground through a limiting piece, and the limiting piece is used for enabling the pressure relief flap to be opened upwards at a certain angle.

5. The box-type substation of claim 4, wherein a magnet is arranged at one end of the arc discharge port far away from the ground, and the magnet is used for magnetically attracting the pressure release flap.

6. The box-type substation of claim 4, wherein the end of the arc discharge opening far away from the ground is provided with a spring piece, the spring piece comprises a fixed end and a free end, the fixed end of the spring piece is connected with the end of the arc discharge opening far away from the ground, and the other end of the spring piece can rotate around the fixed end of the spring piece.

7. The box-type substation according to any one of claims 2-6, characterized in that a filter screen is arranged on the arc discharge port, and the filter screen is fixedly connected with the edge of the arc discharge port.

8. The box-type substation according to any one of claims 2 to 7, characterized in that the bottom of the arc chute is provided with water leakage holes.

9. The box-type substation of any one of claims 2-8, wherein the partition, or the side enclosure of the medium voltage compartment, or the back enclosure of the medium voltage compartment is of a multi-layer structure.

10. The container is characterized by being used for accommodating a low-voltage cabinet, a transformer and a medium-voltage cabinet, wherein the low-voltage cabinet is connected with the medium-voltage cabinet through the transformer;

the container comprises a medium-pressure chamber, wherein an accommodating space is surrounded by the upright post and the shell in the vertical direction to accommodate the medium-pressure cabinet;

the side face of the medium pressure chamber is provided with an arc discharge channel, the arc discharge channel extends in the height direction of the medium pressure chamber, the arc discharge channel is formed by enclosing the upright post, a side face shell of the medium pressure chamber and a partition plate which is positioned in the medium pressure chamber and is opposite to the side face shell of the medium pressure chamber, one end, close to the top of the medium pressure chamber, of the arc discharge channel is provided with an arc discharge port, and the arc discharge port is arranged on the side face shell of the medium pressure chamber; or alternatively, the process may be performed,

The back of middling pressure room is provided with let out the arc passageway, let out the arc passageway and be in extend in the direction of height of middling pressure room, let out the arc passageway by middling pressure room's back shell and be located middling pressure room is indoor and with the baffle that the back shell of middling pressure room set up relatively encloses and establishes and form, let out the arc passageway be close to the one end at middling pressure room top is provided with let out the arc mouth, just let out the arc mouth setting and be in on the back shell of middling pressure room.

11. The container of claim 10, wherein the partition is provided with a through hole for connecting the medium voltage cabinet with the arc discharge passage; or alternatively, the process may be performed,

the vertical below of well switch board is provided with the seat that rises, be provided with the through-hole on the baffle, the through-hole is used for connecting rise seat with let out the arc passageway.

12. The container of claim 11, wherein a pressure relief flap is provided at an end of the vent opening adjacent the ground, the pressure relief flap being connected to an end of the vent opening adjacent the ground by a limiting tab for enabling the pressure relief flap to open upwardly at an angle.

13. The container of claim 12, wherein an end of the vent remote from the ground is provided with a magnet for magnetically attracting the pressure relief flap.

14. The container of claim 12, wherein the end of the arc discharge opening remote from the ground is provided with a spring piece, the spring piece includes a fixed end and a free end, the fixed end of the spring piece is connected to the end of the arc discharge opening remote from the ground, and the other end of the spring piece is rotatable about the fixed end of the spring piece.

15. The box-type substation of any one of claims 10-14, wherein a filter screen is arranged on the arc discharge port, and the filter screen is fixedly connected with the edge of the arc discharge port.

16. The box-type substation of any one of claims 10-15, wherein the bottom of the arc chute is provided with water leakage holes.

17. The box-type substation of any one of claims 10-16, wherein the partition, or the back side enclosure of the medium voltage compartment, or the side enclosure of the medium voltage compartment is of a multi-layer structure.