CN209805224U

CN209805224U - Box-type substation

Info

Publication number: CN209805224U
Application number: CN201920956529.9U
Authority: CN
Inventors: 陈卢明; 侯范武; 杨�嘉; 王怀平; 林允缪; 汤方乐; 顾静娴; 胡云飞
Original assignee: Grand Group Co Ltd
Current assignee: Grand Group Co Ltd
Priority date: 2019-06-24
Filing date: 2019-06-24
Publication date: 2019-12-17
Anticipated expiration: 2029-06-24

Abstract

The utility model provides a box-type substation belongs to substation equipment technical field, include: the transformer chamber is internally provided with a three-winding transformer, a first winding of the three-winding transformer is electrically connected with a high-voltage wire outlet cabinet in the high-voltage chamber, a second winding of the three-winding transformer is electrically connected with a first bus bar in the low-voltage chamber through a first section of bus bar, and a third winding of the three-winding transformer is electrically connected with a second bus bar in the low-voltage chamber through a second section of bus bar; the utility model discloses a box-type substation adopts two kinds of voltages of a three-winding transformer output, connects two female arranging respectively, has not only realized current box-type substation's function, but also can satisfy the different voltage requirement of secondary side, has replaced behind original two transformers, can save box-type substation's area.

Description

box-type substation

Technical Field

The utility model relates to a substation equipment technical field, concretely relates to box-type substation.

Background

A box-type transformer substation, also called a pre-installed transformer substation, is a compact complete set of power distribution equipment which combines high-voltage switch equipment, a distribution transformer, low-voltage switch equipment, electric energy metering equipment, a reactive power compensation device and the like in a box body according to a certain wiring scheme.

The internal structure of the box-type substation is generally in a shape like a Chinese character 'mu' or a 'pin' so as to divide the high-voltage, the low-voltage and the transformer into three independent spaces, and each space is provided with an independent natural ventilation opening and an indoor lighting device. The existing box-type substation is generally powered by a low-voltage double-loop power supply, and as shown in fig. 2, the existing box-type substation is provided with two high-voltage outgoing line cabinets, two transformers, two low-voltage incoming line cabinets, two capacitor cabinets and two low-voltage outgoing line cabinets, so that at least half of the load can be ensured to continue to supply power under the condition of unexpected fault power failure.

However, the conventional box-type substation using low-voltage dual-circuit power supply has a large footprint, and therefore, as the electric capacity for urban power generation increases and the land resources are increasingly in shortage, the box-type substation needs to be further miniaturized.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the box-type substation among the prior art, when adopting the power supply of low pressure double-circuit power supply, the great defect of its appearance size area to a box-type substation that can reduce area is provided.

In order to solve the technical problem, the utility model provides a box-type substation, include:

The box body is internally provided with an overhaul channel;

The transformer chamber is arranged on one side of the overhaul channel and is positioned at one corner inside the box body;

The high-voltage chamber is arranged on the same side of the overhaul channel in parallel with the transformer chamber and is positioned at the other corner inside the box body;

a low voltage chamber disposed at the other side of the service passage opposite to the transformer chamber and the high voltage chamber;

The transformer chamber is internally provided with a three-winding transformer, a first winding of the three-winding transformer is electrically connected with a high-voltage wire outlet cabinet in the high-voltage chamber, a second winding is electrically connected with a first busbar in the low-voltage chamber through a first section of busbar, and a third winding is electrically connected with a second busbar in the low-voltage chamber through a second section of busbar.

Preferably, a low-voltage switch cabinet is arranged in the low-voltage chamber, and the low-voltage switch cabinet comprises:

The first busbar is electrically connected with the I-section busbar through a first low-voltage incoming switch, and a first low-voltage outgoing switch, a first low-voltage capacitor and a low-voltage interconnection switch are further connected in the first busbar;

The second busbar is electrically connected with the second section of bus through a second low-voltage wire inlet switch, and a second low-voltage wire outlet switch, a second low-voltage capacitor and a low-voltage interconnection switch are further connected in the second busbar.

As a preferred scheme, the first low-voltage capacitor and the second low-voltage capacitor are respectively provided with a capacitor switching switch.

As a preferred scheme, the capacitor switching switch is an intelligent control switch.

as the preferred scheme, a PLC data acquisition module is arranged in the intelligent control switch.

Preferably, the low-voltage interconnection switch has a first state of connecting the first busbar and the second busbar, and a second state of disconnecting the first busbar and the second busbar.

Preferably, the first low-voltage outlet switch and the second low-voltage outlet switch are drawer switches.

As a preferred scheme, a high-voltage incoming line cabinet, a high-voltage metering cabinet and a high-voltage outgoing line cabinet which are sequentially arranged are arranged in the high-voltage chamber, the high-voltage incoming line cabinet is used for being electrically connected with a high-voltage power grid, and the high-voltage metering cabinet is connected between the high-voltage incoming line cabinet and the high-voltage outgoing line cabinet.

As a preferred scheme, a low-voltage incoming line cabinet, a low-voltage outgoing line cabinet, a low-voltage capacitor cabinet and a low-voltage communication cabinet are sequentially arranged in the low-voltage chamber.

According to the preferable scheme, a first low-voltage incoming line switch and a second low-voltage incoming line switch are arranged in the low-voltage incoming line cabinet, a first low-voltage outgoing line switch and a second low-voltage outgoing line switch are arranged in the low-voltage outgoing line cabinet, a first low-voltage capacitor and a second low-voltage capacitor are arranged in the low-voltage capacitor cabinet, and a low-voltage interconnection switch is arranged in the low-voltage interconnection cabinet.

The utility model discloses technical scheme has following advantage:

1. The utility model provides a box-type substation, inner structure are article font, adopt a three winding transformer, can export two kinds of voltages, connect two female arranging respectively, have not only realized current box-type substation's function, but also can satisfy the different voltage requirement of secondary side, after having replaced original two transformers, can save box-type substation's area.

2. The utility model provides a box-type substation, hyperbaric chamber set up in the inside one corner department of box, owing to increased the heat radiating area of hyperbaric chamber, consequently can make the interior temperature of hyperbaric chamber control more easily.

3. The utility model provides a box-type substation has the maintenance passageway between low-voltage chamber and hyperbaric chamber, transformer room, is convenient for overhaul indoor each equipment from inside, can also carry out ventilation cooling to each indoor installation through the maintenance passageway to make the temperature in the box-type substation control more easily.

4. the utility model provides a box-type substation, in the high-tension chamber, high-pressure inlet wire cabinet, high-pressure measurement cabinet and high-pressure outlet wire cabinet set gradually, the connection of electric lines between each cabinet of being convenient for.

5. The utility model provides a box-type substation, in the low-voltage chamber, low-voltage incoming line cabinet, low-voltage outgoing line cabinet, low-voltage capacitor box and low-voltage contact cabinet set gradually, and the generating line between each cabinet of being convenient for is connected to because the cabinet number that contains is less, can reduce the area of low-voltage chamber.

6. the utility model provides a box-type substation, transformer capacity can design according to whole accords with to power consumption demand when satisfying the one way power supply adopts the low pressure interconnection switch, separately arranges the load at first female the arranging with the second after, because the best utilization ratio of transformer is 40% ~ 60% of rated power, consequently can make the transformer operation in the best utilization ratio within range.

7. The utility model provides a box-type substation, low pressure outlet switch adopt the drawer switch, and each drawer interchangeability is strong, and it is convenient to overhaul, and during maintenance, because each unit is isolated alone, other electric equipment is not influenced, and large-area power failure is not caused;

The switching switch of the low-voltage capacitor in the low-voltage capacitor cabinet adopts an intelligent control switch, and the switching switch consists of a thyristor, a magnetic latching relay, a zero-crossing trigger conduction circuit and a thyristor protection circuit, so that zero switching of the capacitor is realized, inrush current impact and operation overvoltage are avoided in the switching process, the action response speed is high, and the operation can be frequently performed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of an overlooking structure of the inside of a box body in an embodiment of a box-type substation.

Fig. 2 is a schematic top view of the interior of a box body of a box-type substation in the prior art.

Fig. 3 is a rear view schematic diagram of a low-pressure chamber in an embodiment of a box-type substation.

Fig. 4 is a schematic circuit diagram of an embodiment of the box-type substation of the present invention.

Fig. 5 is the side view structure diagram of the low-voltage capacitor box in the embodiment of the box-type substation.

fig. 6 is a schematic front view of a high-voltage chamber of a box body in an embodiment of the box-type substation of the present invention.

Description of reference numerals:

1. A box body; 2. overhauling the channel; 3. a transformer chamber; 4. a high pressure chamber; 5. a low pressure chamber; 6. a low-voltage incoming cabinet; 7. a low voltage outlet cabinet; 8. a low-voltage capacitor cabinet; 9. a low-voltage communication cabinet; 10. a three-winding transformer; 11. i, a section of bus; 12. II, generating a bus; 13. a first low voltage inlet switch; 14. a second low voltage inlet switch; 15. a first low-voltage outlet switch; 16. a second low-voltage outlet switch; 17. a first low-voltage capacitor; 18. a second low-voltage capacitor; 19. a low voltage interconnection switch; 20. a high-voltage incoming cabinet; 21. a high-voltage metering cabinet; 22. high-voltage outlet cabinet.

Detailed Description

the technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but 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 thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

The embodiment provides a specific implementation mode of box-type substation, as shown in fig. 1, for the inner structure plan view of box 1, has maintenance passageway 2 in box 1, and maintenance passageway 2 is used for overhauing each inside equipment of box 1 on the one hand, and on the other hand can ventilate heat dissipation to each indoor set through maintenance passageway 2, makes the temperature in the box-type substation control more easily.

In the box body 1, one side of the overhaul channel 2 is provided with a transformer chamber 3 and a high-voltage chamber 4 in parallel, the transformer chamber 3 and the high-voltage chamber 4 are respectively positioned at two adjacent corners inside the box body 1, so that the contact area between the transformer chamber 3 and the high-voltage chamber 4 and the outside is increased, namely, the heat-radiating area is increased, and the temperature in the transformer chamber 3 and the temperature in the high-voltage chamber 4 are easier to control.

In the box 1, be located the opposite side of overhaul passageway 2, be provided with low-pressure chamber 5, be equipped with the low-pressure switch cabinet in low-pressure chamber 5. The low-voltage switchgear cabinet includes: the low-voltage incoming cabinet 6, the low-voltage outgoing cabinet 7, the low-voltage capacitor cabinet 8 and the low-voltage interconnection cabinet 9 are arranged in sequence. The cabinets are arranged in sequence in the low-pressure chamber 5, so that the bus connection among the cabinets can be facilitated, and the occupied area of the low-pressure chamber 5 can be reduced due to the fact that the number of the cabinets is small.

compared with the prior art, the present embodiment has the advantages that only one three-winding transformer 10 is arranged in the transformer room 3, and only the low-voltage incoming cabinet 6, the low-voltage outgoing cabinet 7, the low-voltage capacitor cabinet 8 and the low-voltage interconnection cabinet 9 are arranged in the low-voltage room 5 in sequence, so that the occupied area of the transformer substation can be reduced due to less equipment. The first winding of the three-winding transformer 10 is electrically connected with a high-voltage outlet cabinet 22 in the high-voltage chamber 4, the second winding is electrically connected with a first busbar in the low-voltage chamber 5 through a first-section busbar 11, and the third winding is electrically connected with a second busbar in the low-voltage chamber 5 through a second-section busbar 12; according to the arrangement, one three-winding transformer 10 can output two voltages and is respectively connected with two busbars, so that the function of the conventional box-type transformer substation is realized, the different voltage requirements of the secondary side can be met, and the occupied area of the box-type transformer substation can be saved after the two original transformers are replaced.

A box substation of the prior art, as shown in fig. 2, includes: two high-voltage outlet cabinets 22, two transformer cabinets, two low-voltage inlet cabinets 6, two capacitor cabinets and two low-voltage outlet cabinets 7 occupy too large area due to more internal equipment.

As shown in fig. 3, the internal structure of the rear side of the box-type substation, i.e. the low-voltage chamber 5 side, is schematically illustrated, wherein a first low-voltage incoming switch 13 and a second low-voltage incoming switch 14 are arranged in the low-voltage incoming cabinet 6. The first low-voltage outgoing line switch 15 and the second low-voltage outgoing line switch 16 are arranged in the low-voltage outgoing line cabinet 7, and the first low-voltage outgoing line switch 15 and the second low-voltage outgoing line switch 16 are drawer switches. First low-voltage capacitor 17 and second low-voltage capacitor 18 set up in low-voltage capacitor box 8 to, all be equipped with condenser on first low-voltage capacitor 17 and the second low-voltage capacitor 18 and switch, the condenser switch is the intelligent control switch that inside was equipped with PLC data acquisition module, PLC data acquisition module application logic analysis and the on-the-spot on-off state of judgement can show switch trip time and trip number through the touch-sensitive screen, records transformer historical temperature curve and condenser and puts into operation cumulative time. The low-voltage interconnection switch 19 is arranged in the low-voltage interconnection cabinet 9, is respectively connected with the busbars of the first busbar and the second busbar, and has a first state of connecting the busbars of the first busbar and the second busbar and a second state of disconnecting the busbars of the first busbar and the second busbar through operation.

As shown in fig. 4, which is a circuit connection diagram of the equipment in the box-type substation of this embodiment, a high-voltage incoming cabinet 20, a high-voltage metering cabinet 21, a high-voltage outgoing cabinet 22, a transformer cabinet, a low-voltage incoming cabinet 6, a low-voltage outgoing cabinet 7, a low-voltage capacitor cabinet 8, and a low-voltage interconnection cabinet 9 are sequentially arranged from left to right. The high-voltage incoming cabinet 20 is used for being electrically connected with a high-voltage power grid, the high-voltage incoming cabinet 20, the high-voltage metering cabinet 21 and the high-voltage outgoing cabinet 22 are sequentially and electrically connected, the high-voltage outgoing cabinet 22 is electrically connected with a first winding of a three-winding transformer 10 in the transformer cabinet, a second winding of the three-winding transformer 10 in the transformer cabinet is electrically connected with a first-section bus 11, and the second winding is electrically connected with a second-section bus 12.

i section generating line 11 is connected with first female arranging through first low pressure service entrance switch 13 in the low pressure service entrance cabinet 6, first female arranging includes: the first low-voltage incoming switch 13, the first low-voltage outgoing switch 15, the first low-voltage capacitor 17 and the low-voltage interconnection switch 19 are connected in sequence.

second low pressure service entrance switch 14 and the female row of second that II section generating lines 12 pass through in the low pressure service entrance cabinet 6 are connected, female the arranging of second includes: and the second low-voltage incoming switch 14, the second low-voltage outgoing switch 16, the second low-voltage capacitor 18 and the low-voltage interconnection switch 19 are connected in sequence.

As shown in fig. 5, which is a schematic side view of a low-voltage capacitor cabinet 8 of the low-voltage chamber 5 of this embodiment, two manual switches for switching low-voltage capacitors are arranged in front of the cabinet, and the on-off state of the low-voltage capacitors is switched by pushing and pulling the switches up and down; and the buses of the first busbar or the second busbar are respectively and electrically connected with the intelligent switching control switch after passing through the manual switching switch. As can be seen from the figure, the bus bars of the first bus bar and the second bus bar are arranged above the cabinet body in parallel, so that the arranged bus bars can simplify the flat cable in the low-voltage chamber 5 and facilitate the connection between each device and the bus bars.

as shown in fig. 6, which is a schematic structural diagram of the high voltage chamber 4 in the present embodiment, a high voltage outgoing line cabinet 22, a high voltage metering cabinet 21 and a high voltage incoming line cabinet 20 are sequentially arranged, wherein the high voltage outgoing line cabinet 22 is close to the transformer chamber 3 for facilitating connection with a transformer, and the high voltage incoming line cabinet 20 is close to the edge of the box body 1 for facilitating connection with a high voltage power grid.

Principle of operation

The high-voltage power grid is connected with the box-type substation in the embodiment through a high-voltage incoming cabinet 20 in the high-voltage chamber 4, the high-voltage incoming cabinet 20 is sequentially connected with a high-voltage metering cabinet 21 and a high-voltage outgoing cabinet 22, and the load electricity consumption is metered through the high-voltage metering cabinet 21.

The high-voltage alternating current led out from the high-voltage outlet cabinet 22 is connected with the first winding in the three-winding transformer 10 of the transformer chamber 3, so that electromotive force is induced by the second winding and the third winding of the three-winding transformer 10, wherein the second winding is electrically connected with the first-section bus 11, the third winding is electrically connected with the second-section bus 12, and the first-section bus 11 and the second-section bus 12 both extend into the low-voltage chamber 5 and are respectively connected with different low-voltage inlet switches on the low-voltage inlet cabinet 6 in the low-voltage chamber 5. The specific first low-voltage incoming line switch 13 is electrically connected with the I section of bus bar 11, the second low-voltage incoming line switch 14 is electrically connected with the II section of bus bar 12, the first low-voltage incoming line switch 13, the first low-voltage outgoing line switch 15, the first low-voltage capacitor 17 and the low-voltage interconnection switch 19 form a first bus bar, the second low-voltage incoming line switch 14, the second low-voltage outgoing line switch 16, the second low-voltage capacitor 18 and the low-voltage interconnection switch 19 form a second bus bar, and the bus bar of the first bus bar and the second bus bar is switched on and off through the operation of the low-voltage interconnection switch 19.

When the low-voltage incoming line switch on one of the busbars has a fault, the first busbar and the second busbar can be communicated through the low-voltage interconnection switch 19, so that the first busbar and the second busbar are connected in series, and at least half of the load can be ensured to continue to supply power.

The distribution room needs 1-2 times of power failure maintenance every year, when power failure is intentional, because two paths of power supply are provided, one path of power failure can be realized for maintenance, and the normal operation of the load is ensured to a certain extent.

For important loads, a dual-power system can be used during tail-end power distribution, and power supplies of the dual-power system are respectively taken from buses at two ends, so that the influence of fault power failure or maintenance power failure is smaller.

it should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. Box-type substation, its characterized in that includes:

The box body (1) is internally provided with an overhaul channel (2);

The transformer chamber (3) is arranged on one side of the overhaul channel (2) and is positioned at one corner inside the box body (1);

The high-voltage chamber (4) is arranged on the same side of the overhaul channel (2) in parallel with the transformer chamber (3) and is positioned at the other corner inside the box body (1);

A low-pressure chamber (5) arranged on the other side of the service aisle (2) opposite the transformer chamber (3) and the high-pressure chamber (4);

the transformer is characterized in that a three-winding transformer (10) is arranged in the transformer chamber (3), a first winding of the three-winding transformer (10) is electrically connected with a high-voltage outgoing line cabinet (22) in the high-voltage chamber (4), a second winding is electrically connected with a first busbar in the low-voltage chamber (5) through a first section of bus (11), and a third winding is electrically connected with a second busbar in the low-voltage chamber (5) through a second section of bus (12).

2. A substation according to claim 1, characterized in that the low-voltage chamber (5) has a low-voltage switchgear therein, comprising:

The first busbar is electrically connected with the I-section bus (11) through a first low-voltage incoming switch (13), and a first low-voltage outgoing switch (15), a first low-voltage capacitor (17) and a low-voltage interconnection switch (19) are further connected in the first busbar;

The second busbar is electrically connected with the second section of bus (12) through a second low-voltage wire inlet switch (14), and a second low-voltage wire outlet switch (16), a second low-voltage capacitor (18) and a low-voltage interconnection switch (19) are further connected in the second busbar.

3. A substation according to claim 2, characterized in that the first (17) and second (18) low-voltage capacitors are each provided with a capacitor-switched switch.

4. The substation cabinet of claim 3, wherein the capacitor fling-cut switch is an intelligent control switch.

5. The box-type substation of claim 4, characterized in that be equipped with PLC data acquisition module in the intelligent control switch.

6. a substation according to claim 2, characterized in that the low-voltage tie switch (19) has a first state of connecting the busbars of the first and second busbars and a second state of disconnecting the busbars of the first and second busbars.

7. a substation according to claim 2, wherein the first (15) and second (16) low-voltage outlet switches are drawer switches.

8. The box-type substation according to any one of claims 1 to 7, characterized in that a high-voltage incoming cabinet (20), a high-voltage metering cabinet (21) and a high-voltage outgoing cabinet (22) are arranged in the high-voltage chamber (4), the high-voltage incoming cabinet (20) is used for being electrically connected with a high-voltage power grid, and the high-voltage metering cabinet (21) is connected between the high-voltage incoming cabinet (20) and the high-voltage outgoing cabinet (22).

9. A box-type substation according to any one of claims 1 to 7, characterized in that, there are low-voltage incoming cabinet (6), low-voltage outgoing cabinet (7), low-voltage capacitor cabinet (8) and low-voltage interconnection cabinet (9) in the low-voltage chamber (5) in this order.

10. a box-type substation according to claim 9, characterized in that a first low-voltage incoming line switch (13) and a second low-voltage incoming line switch (14) are arranged in the low-voltage incoming line cabinet (6), a first low-voltage outgoing line switch (15) and a second low-voltage outgoing line switch (16) are arranged in the low-voltage outgoing line cabinet (7), a first low-voltage capacitor (17) and a second low-voltage capacitor (18) are arranged in the low-voltage capacitor cabinet (8), and a low-voltage interconnection switch (19) is arranged in the low-voltage interconnection cabinet (9).