CN212366624U - Structure of compact transformer substation - Google Patents

Abstract

The utility model belongs to the electric power electric wire netting field especially relates to a compact transformer substation's structure. The structure adopts multilayer superposition, local structure sinking and local skip layer structure, and adopts a unique 7-shaped or door-shaped cable channel. The structure comprises a lower layer and an upper layer building structure, wherein primary equipment and secondary equipment are arranged on the upper layer and the lower layer, and the structure is characterized in that a horizontal primary cable channel arranged below an upper layer floor slab and a vertical primary cable channel arranged on the lower layer form a unique 7-shaped or door-shaped primary cable channel. The channel solves the problem that when the primary equipment is arranged on the upper layer in the existing arrangement structure, the barrel-shaped cable channel is adopted below the primary equipment to occupy too large area; the upper layer adopts a local skip layer structure, primary equipment and secondary equipment are respectively arranged, and the upper layer space is utilized to the maximum extent. The utility model discloses a purpose is with the same voltage class transformer substation on a large scale, and occupation of land is minimum, operation maintenance space maximize, and safety.

Description

Structure of compact transformer substation

Technical Field

The utility model belongs to the electric power electric wire netting field especially relates to a compact transformer substation's structure.

Background

Along with the annual increase of the power demand of the society, the power supply load of a large city is increased suddenly, the scale capacity is continuously enlarged, the distribution of the transformer substations is more and more intensive, and the transformer substations gradually enter into the bustling areas such as businesses, finance and houses in the center of the large city, on the other hand, the land resources in the urban area are short, and the site selection of the transformer substations becomes an increasingly sharp contradiction. The problems of difficult site selection in urban construction of transformer stations, and the contradictions and problems provide social demands for providing a more compact structure of the transformer station. The large capacity, large scale and small floor space are the solution of the current practical problem.

Taking a certain city as an example, the current power grid faces the large-scale urban substation boosting reconstruction work, and the original urban 35kV substation is boosted to be a 110kV substation. Under the existing floor occupation condition, the difficulty of arranging the 110kV transformer substation is that most of the 110kV transformer substations at present are provided with 110kV GIS rooms and 10kV switch rooms which are arranged on the first floor, and the floor occupation is naturally increased greatly. If arranged in two layers, the problem comes. Firstly, the primary cables of the inlet and outlet lines of the 110GIS are arranged on the wall of the switch building like a waterfall, and the operation units cannot accept the cables. Secondly, the 110kV GIS is arranged on the second floor, and if the upper incoming line is adopted, the overhaul, the disassembly and the assembly of the 110kV GIS are influenced. A primary cable shaft is arranged under a 110kV GIS in a certain scheme, however, the access line position of the 110kV GIS is about 1/3 in a 110kVGIS room, and the primary cable shaft under the 110kV GIS adopts a barrel-shaped structure, so that the occupied area is naturally and greatly increased. A certain power company has ever had a certain scheme, what this scheme adopted has been that the second floor 35kV cubical switchboard below has arranged the cable pit, this cable pit adopts suspension type cable pit, however this cable pit does not utilize the upper portion available space of first floor inspection passageway, but the second floor adopts the structure of choosing outward, like sealing the balcony and choosing out, its part of choosing still is effective area, and its lower part space can not be utilized, does not contribute to the area saving, and it is the same as the barrel type cable shaft of the aforesaid.

The prior patent with publication number CN 206834591U shows that the high-low voltage side power distribution device is disposed on the first floor. Patent publication No. CN 204386224U, the term "machine room" in this patent shall refer to the term "switchgear room" or "switchgear room" in the industry, which is a non-industry term. The key is the scheme and the example mentioned in the patent literature, how the high-voltage distribution device on the upper layer, the two groups of SVQC devices and the inlet and outlet cables are led out is not mentioned, according to the claims, the arrangement structure and the drawings of the specific embodiment, the scheme cannot be implemented by the cross collision of the 10kV switch cabinet and the capacitor bank on the first layer, and the scheme is not a standing scheme.

Typical design schemes issued by a certain power grid company are consulted, 110kV and 220kV GIS are not arranged in an upper-layer scheme, and the reasons for the typical design schemes are mainly the problem of primary cable channels and the problem of equipment hoisting. When the 110kV GIS is arranged on the upper layer, difficulty is brought to equipment hoisting and dismounting. The installation of 110kV GIS all adopts the flat push mode, needs to withdraw from GIS when the GIS room needs to be expanded, return to the factory and maintain, hangs equipment to hoist and mount platform side, and this just needs alternately to lift by crane, and the layer height is higher more than the height that has 2 GIS equipment on the layer, and the upper strata is too high like this, and the building interval is a problem again, and this type transformer substation is urban area transformer substation, and the building interval is very nervous, and the fire control distance is the problem again. If the hoisting platform in single position is adopted in the upper primary equipment room, primary equipment needs to be moved to the side of the hoisting platform when needing to be overhauled, the width of the primary equipment room is required to meet the requirement of the turning radius of the primary equipment, and the occupied area can be increased naturally.

Primary equipment arranged indoors is not conducive to heat dissipation, such as capacitors, reactors, and the like;

most transformer substations can be led out on three sides at most, however, the practical requirement is that the main transformer side is likely to need to be led out, especially the occupied area is short, if the main transformer side cannot be led out, a cable trench needs to be turned inside or outside a station, so that the condition that the site is available or not is needed, the site in an urban area is very short, and the condition that many sites are not available is increased for rebuilding the original site.

Some underground substations are already present in part of the first-line cities, but the underground substations still occupy a large area even under the ground if compact arrangement structures are not adopted, and do not contribute much to saving the occupied area if the underground substations are not combined with other comprehensive buildings.

If adopt multilayer arrangement structure, high pressure side distribution device is generally evenly arranged to the upper strata, because high pressure side distribution device once business turn over the line less for the low pressure side, however high pressure side distribution device often equipment is higher, if the equipment room height of its side space rather than the same, can cause the waste of vertical space, all arrange in same layer again in addition and can cause the increase of taking up an area of, if add the one deck again, the whole height of switch building can increase again, the building interval can increase again, has brought the difficulty for the land acquisition.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a compact transformer substation structure scheme. The utility model discloses an aim at practice thrift and account for the ground, solve present urban substation land used nervous, the problem of the difficulty of seeking to land. For example, the problem that the land acquisition needs to be enlarged when the original site of the 35kV transformer substation is boosted and rebuilt into the 110kV transformer substation is solved.

In order to achieve the above object, the utility model adopts the following technical scheme: a structure of a compact transformer station comprises a lower layer and an upper layer building structure, wherein a primary equipment room and a secondary equipment room are arranged on the lower layer and the upper layer and comprise main transformer rooms, and the structure is characterized in that a primary cable horizontal channel is arranged indoors or partially outdoors on the upper space of the lower layer, below an upper layer floor slab and on the incoming and outgoing side of upper layer primary equipment, a primary cable vertical channel is arranged indoors or outdoors, and the primary cable vertical channel is communicated with the primary cable horizontal channel arranged below the upper layer floor slab, namely, a 7-shaped or door-shaped primary cable channel is formed. The horizontal channel may be a suspended or sunken primary raceway arranged indoors or partly outdoors in the lower floor, or other forms of primary cable horizontal channel: such as primary cable bridge, primary cable shelter, or primary cable exposure direct laying; or cables and equipment interlayers are arranged between the lower floor and the upper floor, one part of area is used as the cable interlayer, and the other part of area is provided with equipment. The scheme adopted by the vertical channel can be a primary cable shaft; an embedded primary cable groove box can be arranged in a wall, a primary cable is fixed in the groove box, a cover of the primary cable groove box is flush with the wall, and the primary cable groove box can be opened during maintenance and laid along the vertical direction of the wall; an external primary cable groove box can be arranged on the surface of the wall; a cable shaft can be made on the outer side of the outer wall; and the embedded primary cable groove box is arranged outside the wall. When the horizontal channel is communicated with vertical channels such as a primary cable shaft, a primary cable groove box and the like, a 7-shaped primary cable channel is formed. When the horizontal channel is communicated with the vertical channels at two ends of the lower equipment room and the like, a 'door' -shaped primary cable channel is formed. When the horizontal channel is communicated with the vertical channel at one end of the lower equipment room, the horizontal channel is also called as a 7-shaped primary cable channel. When the three vertical primary cable channels are communicated, the three vertical primary cable channels are called as a Chinese character 'shan', and are not listed. When vertical passageway arranged in the outside of outer wall, need the horizontal passageway of a cable below the upper floor board stretch out the outside of outer wall just can with vertical passageway intercommunication, nevertheless the extension should not be too much, promptly the extension satisfy a cable of below draw up perpendicularly can, promptly the main part of the horizontal cable passageway of a cable below the upper floor board is indoor, otherwise the extension is too much or all outdoor, causes the lower floor to take up an area of too big equally, is as good as with the cable shaft of barrel-shaped once at present. The purpose of this structure has been solved the too big problem of barrel type cable shaft occupation of land, has solved primary equipment and has arranged when the upper strata, and a great deal of problem that primary cable business turn over line brought for primary equipment arranges that primary equipment can realize in the upper strata, and reduction by a wide margin takes up an area of, arranges moreover compactly rationally pleasing to the eye.

Furthermore, a plurality of hoisting platforms are arranged on the upper layer. The purpose of this structure is when a plurality of hoist and mount platforms are arranged to primary equipment room, all during natural equipment fixing or demolish the position side of equipment all from hoist and mount platform side get into or withdraw from can, save the required height of crossing, reduced the height of upper equipment room, required turning radius when having saved equipment translation, further saved and taken up an area of.

Further, the upper layer primary equipment is wholly or partially arranged on an outdoor roof. The purpose of this structure is that the primary equipment of the upper layer is arranged wholly in the open air or partly in the open air roof. The outdoor roof arrangement scheme is favorable for equipment heat dissipation and reduces the overall height of the switch building.

Furthermore, a primary cable trench is arranged on the side between the main transformers. The width of an oil storage pool between the main transformers or below the radiator chamber is properly contracted, the depth of the oil storage pool is increased, enough primary cable trench width is reserved, and the primary cable trench is arranged on the side of the main transformer. The purpose of this structure is that the main transformer side of switch building can realize once the cable and be qualified for the next round of competitions, when the main transformer side need be qualified for the next round of competitions, has saved other side and has been qualified for the next round of competitions and has changeed the occupied land of main transformer side again, has practiced thrift the occupation of land.

Further, the substation is in a full underground station descending mode or a half underground station descending mode or a combined building mode of the above modes and other buildings. The structure is an underground multi-layer structure, and secondary equipment rooms are respectively arranged. For example, the main transformers are arranged on an underground negative second floor, and the height of the main transformers penetrates through the underground negative first floor and the underground negative second floor, namely, the mode of the whole underground station; or the main transformer is arranged on the ground, and other primary equipment and secondary equipment adopt a semi-underground station mode of underground arrangement; and a full underground station or a half underground station can be combined with other buildings. The special 7-shaped or door-shaped primary cable channel is used for realizing the wire inlet and outlet of primary equipment, and the purpose of saving occupied area is realized.

A structure of compact transformer station is composed of lower and upper building structures, and the primary and secondary equipment rooms containing main transformer rooms are arranged between lower and upper building structures. The primary equipment of high pressure side is often arranged to the upper strata, and its equipment room height is higher than other one, secondary equipment room more, if the space of its next door only arranges the individual layer, can cause the waste of vertical space, consequently divides into two-layer the jump layer structure promptly with the partial space on upper strata, places one, secondary equipment respectively. For example, when a GIS chamber, a capacitor chamber and a secondary equipment chamber on the high-voltage side are arranged on the upper layer, the lateral space of the high-voltage GIS chamber is divided into a skip structure, the capacitor chamber is arranged on the lower layer of the skip structure, and the secondary equipment chamber is arranged on the upper layer of the skip structure; or the lower layer is provided with a secondary equipment chamber, and the upper layer is provided with a capacitor chamber. The purpose of this structure is to practice thrift the occupation of land, makes to arrange compactly rationally to reach the space utilization maximize, and reduced the vertical height of cubical switchboard.

Furthermore, a plurality of hoisting platforms are arranged on the upper layer. The purpose of this structure is when a plurality of hoist and mount platforms are arranged to primary equipment room, all during natural equipment fixing or demolish the position side of equipment all from hoist and mount platform side get into or withdraw from can, save the required height of crossing, reduced the height of upper equipment room, required turning radius when having saved equipment translation, saved and taken up an area of.

Further, the upper layer primary equipment is wholly or partially arranged on an outdoor roof. The purpose of this structure is that the primary equipment of the upper layer is arranged outdoors in its entirety or partially. The outdoor arrangement scheme is favorable for equipment heat dissipation and reduction of the overall height of the switch building.

Furthermore, a primary cable trench is arranged on the side between the main transformers. The width of an oil storage pool between the main transformers or below the radiator chamber is properly contracted, the depth of the oil storage pool is increased, enough primary cable trench width is reserved, and the primary cable trench is arranged on the side of the main transformer. The purpose of this structure is that the main transformer side of switch building can realize once the cable and be qualified for the next round of competitions, has saved other side and has been qualified for the next round of competitions, turns to the main shared land of transformer side again, has practiced thrift the occupation of land.

Further, the substation is in a full underground station descending mode or a half underground station descending mode or a combined building mode of the above modes and other buildings. For example, the structure is that a distribution device room at a high-voltage side is arranged on the underground negative layer, the side space is divided into two jumping layers, a part of the first and second equipment rooms are respectively arranged, and the other part of the first and second equipment rooms is arranged on the underground negative layer. The main transformer is arranged on the underground negative second floor, and the height of the main transformer penetrates through the underground negative first floor and the underground negative second floor, namely the full underground station mode; or the main transformer is arranged on the ground, and other primary equipment and secondary equipment adopt a semi-underground station mode of underground arrangement; and a full underground station or a half underground station can be combined with other buildings. The structure aims to divide the local space of the upper layer into a jump layer structure, so that the occupied area of an underground station or a semi-underground station is reduced.

The utility model has the advantages that: due to the adoption of the 7-shaped or door-shaped primary cable channel, the problem that the barrel-shaped cable shaft occupies too large space is solved, and a plurality of problems caused by the entrance and exit of a primary cable when primary equipment is arranged on the upper layer are solved, so that the primary equipment is arranged on the upper layer, the occupied space is greatly reduced, and the arrangement is compact, reasonable and attractive. And because the local space of the upper layer is divided into the skip-floor structure, the upper-layer space is utilized to the maximum extent, the arrangement is more compact and reasonable, the occupied area is further saved, and the vertical height of the switch building is reduced. The utility model discloses the arrangement of transformer substation structure is compact reasonable, realizes large capacity, extensive, the transformer substation structure that occupies an area of a little, accords with the technical development trend, has solved the realistic problem of current social development.

Drawings

Fig. 1 is an electrical main wiring diagram.

Fig. 2 is a schematic electrical floor plan of a first level of the scheme.

Fig. 3 is a schematic diagram of a two-layer electrical plane layout.

Fig. 4 is a plan view of a primary and secondary equipment chamber arrangement.

Fig. 5 is an electrical cross-sectional layout of a switchgear.

Fig. 6 is an electrical layout diagram of a cable and equipment interlayer in a second scheme.

Fig. 7 is a plan view of a second layer of electrical equipment according to the embodiment.

Fig. 8 is an electrical section layout diagram of a second switch building.

1. 10kV switch room 2, main transformer room 3, main transformer radiator room 4, 10kV grounding small resistor room 5, first-floor cable shaft 6, 110kV GIS room 7, 10kV capacitor room 8, secondary equipment room 9, stairwell 10, underground cable interlayer 11, local cable trench 12 below second-floor, cable equipment interlayer 13 and hoisting platform

Detailed Description

The embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be emphasized that the embodiments described herein are illustrative and not restrictive, and thus the present invention includes but is not limited to the embodiments described in the detailed description, as well as other embodiments derived from the technical solutions of the present invention by those skilled in the art, which also fall within the scope of the protection of the present invention.

The embodiment is the case that the typical design scheme of a certain 35kV transformer substation of a certain power grid company is boosted to a 110kV transformer substation, and the occupied area is the smallest scheme in the same-scale scheme of the original 35kV transformer substation and the scheme which is used most in a certain city. In the embodiment, the original site of the 35kV transformer substation scheme is rebuilt into the 110kV transformer substation, the main transformer capacity is increased, the number of outgoing lines and loops on the low-voltage side is increased, the reactive compensation capacity is increased, the number of secondary protection disks is increased, the operation and maintenance space is unchanged or even larger, the original site rebuilding is realized without re-land acquisition under the large land shortage environment at present, and the regulation and specification requirements are met, so that the scheme is also suitable for a new land acquisition transformer substation. The scheme solves the problem of difficulty in land acquisition of a new substation. The arrangement is more compact and reasonable, and four-side incoming and outgoing lines can be realized. In particular, the example refers to a 110kV substation, the invention being equally applicable to other voltage classes. The upper-layer high-voltage primary equipment of the embodiment is a GIS, and is also suitable for other primary equipment. In the specific embodiment, the floor area of the original 35kV substation switchyard occupies 30X18.6, and the floor area of the 110kV substation switchyard occupies 29X18.6 meters in the specific embodiment, and the above dimensions refer to the axial dimension of the switchyard.

The construction scale is 2X50000kVA, and the voltage grade is 110/10 kV; two sections of independent single buses are adopted for wiring at the 110kV side, and each section of bus is connected in and out one by one; the 10kV side is single bus sectional wiring, the outgoing line is 38 times (including 6 times of outgoing line of the capacitor group), the total station reactive compensation is designed according to 3 groups of capacitor groups of each main transformer, the capacity is 4008+2X2004kvar capacitor group design, and 6 groups are provided in total, and an electrical main wiring diagram is shown in detail.

Selecting main equipment: the main transformer selects a three-phase two-coil oil immersed self-cooling on-load voltage regulation high-impedance transformer, and the body and the radiator are separately arranged; voltage ratio: 110 plus or minus 3 multiplied by 2.5%/10.5 kV; capacity ratio: 50/50 MVA; the 110kV electrical equipment is SF6 insulated fully-enclosed combined electrical (GIS) complete indoor equipment. The 10kV switch cabinet is an indoor armored metal closed switch cabinet; the 10kV capacitor adopts frame type complete indoor equipment.

Structure of compact substation

Scheme one

A switch building is built, and a transformer substation adopts a whole-indoor arrangement scheme. The switch building is of an overground two-layer structure with a semi-underground cable interlayer. The height of the semi-underground interlayer is 2.7 m; the height of the first layer is 5.0 m; the height of the second layer is 6.5m, the local arrangement is a jump layer structure, the height of the first layer of the jump layer structure is 3.5m, and the height of the second layer is 3 m. The main transformer chamber, the 10kV switch chamber and the grounding transformer chamber are arranged on the first floor of the switch building; the 110kVGIS chamber and the 10kV capacitor chamber are arranged on two layers, and the secondary equipment chamber is arranged above the capacitor chamber to form a local jump layer structure. The incoming and outgoing lines of the 110kVGIS adopt a 110kV single-core primary cable to pass through a semi-underground cable interlayer and then are led to a cable trench below a second floor through a first-floor cable shaft and then are led to a 110kV GIS. The 10kV capacitor bank adopts a 10kV3 core cable to lead to a 10kV capacitor bank on the second floor through a cable interlayer and a first-floor cable shaft. And a plurality of hoisting platforms are arranged in the GIS chamber and the capacitor chamber on the second layer, so that the secondary equipment can be conveniently mounted and dismounted. The 10kV switch cabinet is connected with a main transformer by a bus sleeve; the floor occupation of a switch building is 29X18.6 meters, and is basically the same as the floor occupation of a 35kV typical design scheme of a certain power grid company by 30X18.6 meters; the specific arrangement scheme is shown in the attached drawing, the original site occupied land is reconstructed, the operation maintenance space and the charged distance meet the requirements of regulation specifications, and the scheme is feasible.

Scheme two

A switch building is built, and a transformer substation adopts a whole-indoor arrangement scheme. The switch building is of an overground two-layer structure with a semi-underground cable interlayer. The height of the interlayer layer of the semi-underground cable is 2.7 m; the height of the first layer is 5.0 m; the height of the two layers is 6.5 m. And a cable and equipment interlayer is arranged between the first layer and the second layer, and the height of the interlayer is 2.7 m. The main transformer room, the 10kV switch room and the grounding transformer room are arranged on the first floor of the switch building; the 110kVGIS chamber and the 10kV capacitor chamber are arranged on two layers; and functionally partitioning the cable and the equipment interlayer between the first layer and the second layer, wherein one side of the cable interlayer is a cable interlayer for incoming and outgoing lines of a 110kV GIS and outgoing lines of a 10kV capacitor, and the other side of the cable interlayer is provided with a secondary equipment room. The incoming and outgoing lines of the 110kV GIS adopt a single-core primary cable to pass through a semi-underground cable interlayer and then are led to the cable between the first layer and the second layer and the equipment interlayer through the first layer cable shaft and then are led to the 110kV GIS. The 10kV capacitor bank is led to the 10kV capacitor bank by a 10kV 3-core cable through a semi-underground cable interlayer, a first-layer cable shaft and a cable and equipment interlayer between the first layer and the second layer. And a plurality of hoisting platforms are arranged in the GIS chamber and the capacitor chamber on the second layer, so that the secondary equipment can be conveniently mounted and dismounted. The 10kV switch cabinet is connected with a main transformer by a bus sleeve; the floor occupation of the switch building is 29X18.6 meters, which is basically the same as the floor occupation of a 35kV typical design scheme of a certain power grid company, which is 30X18.6 meters.

The above description is only for the preferred embodiment of the present invention, and should not be taken as limiting the present invention, and any modifications, equivalent replacements, and improvements made within the spirit and scope of the present invention should be included in the present invention.

Claims (10)

1. A structure of a compact transformer station comprises a lower layer and an upper layer building structure, wherein a primary equipment room and a secondary equipment room are arranged on the lower layer and the upper layer and comprise main transformer rooms, and the structure is characterized in that a primary cable horizontal channel is arranged indoors or partially outdoors on the upper space of the lower layer, below an upper layer floor slab and on the incoming and outgoing side of upper layer primary equipment, a primary cable vertical channel is arranged indoors or outdoors, and the primary cable vertical channel is communicated with the primary cable horizontal channel arranged below the upper layer floor slab, namely, a 7-shaped or door-shaped primary cable channel is formed.

2. The structure of the compact transformer substation of claim 1, wherein the upper layer is further provided with a plurality of hoisting platforms.

3. The structure of a compact substation according to claim 1, wherein the upper level primary equipment is wholly or partially arranged on an outdoor roof.

4. The structure of a compact substation according to claim 1, wherein a primary cable trench is arranged between the main transformers.

5. The structure of the compact substation of claim 1, wherein the substation is in a full underground substation mode or a semi-underground substation mode or a combined construction mode with other buildings.

6. A compact structure of a transformer station comprises a lower layer and an upper layer building structure, wherein a primary equipment room and a secondary equipment room are arranged on the lower layer and the upper layer, and each secondary equipment room comprises a main transformer room, a primary cable vertical channel and a horizontal channel.

7. The structure of the compact transformer substation of claim 6, wherein the upper layer is further provided with a plurality of hoisting platforms.

8. The structure of a compact substation according to claim 6, wherein the upper level primary equipment is wholly or partially arranged on an outdoor roof.

9. The structure of a compact substation according to claim 6, wherein a primary cable trench is arranged between the main transformers.

10. The structure of the compact substation of claim 6, wherein the substation is in a full underground substation mode or a semi-underground substation mode or a combined construction mode with other buildings.

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