CN214543278U - 110kV underground traction substation structure arranged above rail-mounted area - Google Patents

Abstract

The utility model discloses a 110kV underground traction substation structure that sets up in trackbound district top, wherein: the underground traction power transformation is arranged above a track running area of an underground station of the track traffic; underground traction substation adopts secret three-layer construction, wherein: the underground three layers are cable interlayers; the traction transformer chamber is communicated upwards from the bottom plate of the underground second floor to the top plate of the underground first floor, a traction transformer is arranged in the traction transformer chamber, and SF is adopted₆A gas-insulated power transformer. The underground traction substation is arranged above a rail road area, the requirements of relevant specifications are met through technical means, the problems of fire prevention, safety, electromagnetism, vibration, noise and the like are solved, the underground space is effectively utilized, the underground traction substation becomes an effective structural form for constructing intercity railways, urban railways, state railway underground stations and traction substations, the independent land acquisition of the traction substation or the traction electric power combined main substation is not needed, the underground traction substation and the subway station share a foundation pit and support engineering, and the engineering investment of the underground traction substation can be remarkably constructed.

Description

110kV underground traction substation structure arranged above rail-mounted area

Technical Field

The utility model belongs to rail transit pulls the power supply field, especially intercity, city territory, state iron pull the power supply field, concretely relates to 110kV underground traction substation structure that sets up in the trackbound district top.

Background

With the acceleration of economic development and urbanization process, the construction scheme of the overground indoor traction substation cannot meet the requirements of urban planning departments. The mode of adopting underground transformer substation becomes important choice, has had the case of building independent transformer substation in municipal power supply field in whole underground or semi-underground in Shanghai, Guangzhou etc. place, and the ground only leaves air intake and air outlet. However, in the field of traction power supply of rail transit, there are few cases to be referred to, and particularly, there is no scheme for providing an underground traction substation above a rail running area.

SUMMERY OF THE UTILITY MODEL

The rail transit traction substation adopts a full-underground construction mode, and has important significance for site selection of the rail transit high-voltage and high-capacity underground traction substation, realization of intensive land utilization and optimization of urban space. The underground station buried depth of part of the city core area reaches 30m, and a narrow and long area 200 multiplied by 30 multiplied by 20m above the rail running area at the end part of the underground station has the condition of arranging an underground traction substation. If the traction substation is arranged above the rail traveling area, the underground space can be effectively utilized, the underground space and the subway station construction share the foundation pit and the supporting engineering, and the investment can be obviously reduced.

The existing fireproof design specifications are fuzzy to the joint construction regulations of underground substations and non-residential buildings, and have no regulations to the scheme of arranging underground traction substations in a rail-mounted area. The traction substation is arranged above the rail area, and the key technical difficulties to be solved comprise at least one of the following:

1. how to reduce the fire hazard of the spare room of the traction substation equipment, meet the requirements of fire departments and ensure the rail transit and the personnel safety is of great importance;

2. how to prevent high potential transfer;

3. how to perform electromagnetic shielding;

4. how to prevent the gas relay of the traction transformer from misoperation;

5. how to solve the noise sources such as a main transformer room, a ventilation fan room and the like.

At least one in defect or improvement demand more than prior art, the utility model provides a 110kV underground traction substation structure that sets up in trackway district top, with underground traction substation set up in trackway district top, satisfy relevant standard's requirement through the technological means, solve the fire prevention, safety, electromagnetism, vibration, noise scheduling problem, effectively utilize underground space, will become intercity railway, the urban area railway, a state railway underground station and the effective structural style of traction substation construction, need not to collect to land alone for traction substation or traction electric power joint construction main substation, with subway station construction sharing foundation ditch and supporting engineering, can show the engineering investment of constructing underground traction substation.

To achieve the above object, according to an aspect of the present invention, there is provided a 110kV underground traction substation structure provided above a rail-bound district, wherein:

the underground traction power transformer is arranged above a track running area of an underground station of the track traffic, and shares a foundation pit and a supporting project with the underground station;

underground traction substation adopts underground three-layer structure, wherein:

the underground three layers are cable interlayers, and the bottom plate of the cable interlayer is a top plate of a track running area of the underground station of the track traffic;

and at the section of the traction transformer chamber, the traction transformer chamber penetrates upwards from the bottom plate of the underground second floor to the top plate of the underground first floor, a traction transformer is arranged in the traction transformer chamber, and the traction transformer adopts an SF6 gas insulation power transformer.

Further preferably, a total accident oil sump is also included;

the total accident oil storage pool is arranged on the underground three layers.

Further preferably, a double-layer earth screen is adopted by the underground traction power transformation;

the lower layer of the double-layer ground net is arranged on a bottom plate of a track area of the rail transit underground station, and the upper layer of the double-layer ground net is arranged between the ground surface and a top plate of the track area of the rail transit underground station.

Further preferably, the double-layer ground net is connected with a building in the traction substation, a structure structural steel bar, a building steel bar of a rail transit underground station and a steel bar in the underground diaphragm wall into a whole.

Further preferably, the connected whole is a faraday cage.

Further preferably, the traction transformer employs a GIT no-buchholz relay.

Further preferably, the system also comprises a ventilator room;

the ventilator room is arranged in the underground floor, and a fan and an air conditioning unit are arranged in the ventilator room.

Further preferably, the fan and the air conditioning unit adopt a fan and an air conditioning unit with low-frequency noise below 200 Hz.

Further preferably, sound absorbing materials are arranged in the traction transformer room and the ventilator room.

Further preferably, the equipment house of the traction transformer room is a class d factory house.

The above-described preferred features may be combined with each other as long as they do not conflict with each other.

Generally, through the utility model discloses above technical scheme who conceives compares with prior art, has following beneficial effect:

1. the utility model discloses a 110kV underground traction substation structure that sets up in trackbound district top, with underground traction substation set up in trackbound district top, satisfy relevant standard's requirement through technical means, solve the fire prevention, safety, electromagnetism, vibration, noise scheduling problem, effectively utilize secret space, will become intercity railway, the municipality territory railway, the effective structural style of state railway underground station and traction substation construction, need not to collect on the earth for traction substation or traction electric power joint construction main substation alone, construct sharing foundation ditch and strut engineering with subway station, can show the engineering investment of constructing underground traction substation.

2. The utility model discloses a 110kV underground traction substation structure that sets up in trackbound district top can be applied to the underground traction substation of independent construction to measures such as safety, electromagnetism, vibration, noise, and the sensitive whole indoor traction substation in ground of environment helps constructing the new generation traction substation of operation safety and environment friendly and pulls and the main substation of electric power co-construction.

3. The utility model discloses a 110kV underground traction substation structure that sets up in trackbound district top, traction transformer adopts SF6 gas-insulated power transformer (GIT), SF6 is gaseous has characteristics not burning, not explosive as transformer insulation and coolant's GIT for SF6 gas-insulated transformer is in the transformer when breaking down, can not explode and not fire the burning, no fire hazard, traction substation equipment house reduces to the class of butyl, satisfy the relevant requirement of "architectural design fire prevention standard".

4. The utility model discloses a 110kV underground traction substation structure that sets up in trackway district top, traction substation sets up double-deck earth mat, and utilize the railway to synthesize the thinking of ground connection and equipotential connection, will pull the substation earth mat, pull the building in the substation, structure reinforcing bar, subway station building reinforcing bar, the reinforcing bar in the wall links into a whole, the artificial grounding body that the construction is constituteed by double-deck earth mat and the comprehensive grounding system of the natural grounding body that secret civil engineering reinforced concrete constitutes, show and reduce ground resistance, reduce the ground potential lifting. Meanwhile, the measures that the communication line adopts optical cables and low-voltage cable lines to set isolation transformers are adopted, and high potential transmission is prevented.

5. The utility model discloses a 110kV underground traction substation structure that sets up in the trackbound district top requires to pull building, structure construction steel bar connection one-piece in the substation to link to each other with the ground net, form a Faraday cage, further shield and pull the influence of substation electromagnetic radiation to all ring edge borders.

6. The utility model discloses a 110kV underground traction substation structure that sets up above the track line district, traction transformer adopt GIT not have buchholz relay, have prevented traction transformer's buchholz relay malfunction.

7. The utility model discloses a 110kV underground traction substation structure that sets up in the trackbound district top adopts low frequency noise's ventilation, air conditioner and electrical equipment to all set up sound absorbing material in traction transformer room, fan room, the influence of noise abatement to the environment.

Drawings

Fig. 1 is a schematic cross-sectional structural view of a 110kV underground traction substation configuration disposed above a rail-bound region according to an embodiment of the present invention;

fig. 2 is a schematic plan view of an underground layer constructed by a 110kV underground traction power transformer disposed above a rail-bound area according to an embodiment of the present invention;

fig. 3 is a schematic plan view of an underground secondary layer constructed by a 110kV underground traction power transformer disposed above a rail-bound region according to an embodiment of the present invention;

fig. 4 is a schematic plan view of an underground three-layer structure of a 110kV underground traction substation structure provided above a rail-mounted area according to an embodiment of the present invention.

The dimensions in the above figures are in mm.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. The present invention will be described in further detail with reference to the following embodiments.

As a preferred embodiment of the present invention, as shown in fig. 1 to 4, the present invention provides a 110kV underground traction substation structure provided above a rail-bound area, wherein:

the underground traction power transformer is arranged in an area with the length of 63m and the width of 31m above a rail running area of a rail transit underground station, a foundation pit and a supporting project are shared with the underground station, and the shared supporting project comprises a plurality of layers of supporting upright columns extending upwards from the supporting upright columns of the rail running area. Rail transit herein includes, but is not limited to, inter-city railways, city-area railways, state railways, and the like.

As shown in fig. 1, the underground traction power transformation adopts an underground three-layer structure, wherein:

the underground three-layer B3 is a cable interlayer, and the bottom plate of the cable interlayer is the top plate (the elevation is 5.1 m) of the track area of the track traffic underground station;

at the section of the traction transformer chamber 21, the traction transformer chamber 21 penetrates from the bottom plate of the second underground layer B2 to the top plate of the first underground layer B1, and a traction transformer 211 is arranged in the traction transformer chamber.

Fig. 1 to 4 illustrate an example in which a 110kV underground traction substation is provided above a track area of an underground station of a subway in a track traffic.

The underground floor B1 (elevation-2 m) is provided with a ventilation machine room 11, a fire control room 12, a fire pump room 13, a secondary equipment room 14, a communication room 15, an AC/DC power supply room 16, a low-voltage distribution room 17, a gas cylinder room 18, a fire pool 19 and the like according to figure 2.

The underground second floor B2 (with the elevation of-9.5 m) is provided with a traction voltage transformation chamber 21, a 110kV GIS combined electrical apparatus chamber 22, a tool chamber 23, a 27.5kV high voltage chamber 24, a reactive power compensation chamber 25 of the power system, a transformer chamber 26 and the like according to fig. 3.

The underground three-story B3 (elevation-13.5 m) is provided with a total accident oil sump 31 (capacity 35 t), a main transformer oil pit 32, a cable well 33 and the like according to fig. 4.

The underground three-layer structure is provided with a substation evacuation building 10 which is arranged in a vertically through mode.

(1) Reducing the fire risk of a backup room of a traction substation facility

The underground traction power transformation adopts an underground three-layer structure, the traction transformer is arranged on an underground two-layer, and the total accident oil storage tank 31 is arranged on an underground three-layer B3.

Comparative example: if the traction transformer adopts an oil-immersed transformer conventionally, the fire hazard risk of a traction transformer room and a total accident oil storage pool is class C, and the equipment house of the traction substation is determined according to the greater fire hazard risk and belongs to class C plants. When the cable is arranged in a track area, the following regulations in section 5.4.12 of building design fire protection Specification GB50016-2014 (2018 edition) are not met:

"oil or gas fired boiler, oil immersed transformer, high voltage capacitor and multi-oil switch filled with combustible oil, etc., are suitable to be arranged in special rooms outside the building; when the arrangement of the private rooms close to the civil buildings is required, the private rooms are divided by adopting a firewall and the adjacent buildings, the private rooms are not close to the places of the dense personnel yard, and the fire-resistant grade of the private rooms is not lower than the second grade; when the cable is required to be arranged in a civil building, the cable is not arranged on the upper layer, the lower layer or close to the place where people are densely arranged, and the following regulations are met: the capacity of the boiler is in accordance with the regulations of the current national standard boiler room design specification GB 50041. The total capacity of the oil-immersed transformer should not be more than 1260kVA, and the capacity of a single oil-immersed transformer should not be more than 630kVA ".

The utility model discloses traction transformer adopts SF6 gas-insulated power transformer (GIT), and SF6 is gaseous has characteristics not burning, not exploding as transformer insulation and coolant's GIT for SF6 gas-insulated transformer in case the transformer breaks down, can not explode and not fire the burning, no fire hazard, and traction substation equipment house reduces to the class of butyl, satisfies the relevant requirement of "architectural design fire prevention standard".

(2) Safety measures against high potential transmission

The underground traction power transformation is compact in arrangement, the area of a grounding grid of the underground traction power transformation is limited, and a grounding system is difficult to implement. When a short-circuit fault occurs in the traction substation, the ground potential of the traction substation is raised by the ground grid, and the high potential is transmitted to the surrounding environment at the edge of the ground grid and by introducing a cable line of the traction substation, so that personal safety is endangered.

The utility model discloses traction substation sets up double-deck earth mat, lower floor's earth mat set up in the double-deck earth mat in the bottom plate in the track traffic underground station's the line of track district, the upper strata earth mat set up in earth's surface (elevation 7.612 m) with between the roof in the track traffic underground station's the line of track district, be located 0.6-0.8m below the earth's surface to utilize the thought that the railway synthesized ground connection and equipotential are connected, will pull the transformer substation earth mat, pull building in the transformer substation, structure reinforcing bar, subway station building reinforcing bar, the reinforcing bar that links up in the wall connects into a whole, the artificial grounding body that the construction comprises double-deck earth mat and the synthetic grounding system of the natural grounding body that underground soil construction reinforced concrete constitutes are showing and are reducing ground resistance, reduce the ground potential lifting. Meanwhile, the measures that the communication line adopts optical cables and low-voltage cable lines to set isolation transformers are adopted, and high potential transmission is prevented.

(3) Adopt targeted electromagnetic shielding measures

The traction substation is a single-phase load, the single-phase power supply current on the low-voltage side of a main transformer of the traction substation can reach 3600A, the single-phase load generates an electromagnetic field, the attenuation of the magnetic field intensity is very quick, but due to the fact that the single-phase load is arranged above a track region and is attached to a near-city station, relevant shielding measures still need to be taken.

The utility model discloses building, structure steel bar connection become a whole in the requirement pulls the electric substation to link to each other with the ground net, form a Faraday cage, further shield and pull the influence of electric substation electromagnetic radiation to all ring edge borders.

(4) Measures for preventing malfunction of gas relay of traction transformer

In a vibration environment of a traction transformer of a traction substation, a gas relay is easy to malfunction, so that the design specification of railway electric traction power supply TB 10009-2016: the distance between the fence of the traction substation and the line center of the nearest station track is required to be less than 10 m in section 4.1.1.

The utility model discloses traction transformer adopts the GIT not have buchholz relay, has prevented traction transformer's buchholz relay malfunction.

(5) Sound insulation measure for noise sources such as main transformer room and ventilation fan room

Traction transformer, high-low voltage distribution device will produce a large amount of heats in the operation process, and the unable natural draft of underground traction substation needs fans such as fan room 24 hours reliable work, and the low frequency noise of main transformer operation in-process and ventilation equipment's noise stack probably cause noise influence to operation maintainer and peripheral passenger.

The utility model discloses a ventilation, air conditioner and electrical equipment of low frequency noise (below 200 Hz) to all be equipped with sound absorbing material in traction transformer room 21, fan room 11, the influence of noise reduction to the environment.

To sum up, compare with prior art, the utility model discloses a scheme has following apparent advantage:

the utility model discloses a 110kV underground traction substation structure that sets up in trackbound district top, with underground traction substation set up in trackbound district top, satisfy relevant standard's requirement through technical means, solve the fire prevention, safety, electromagnetism, vibration, noise scheduling problem, effectively utilize secret space, will become intercity railway, the municipality territory railway, the effective structural style of state railway underground station and traction substation construction, need not to collect on the earth for traction substation or traction electric power joint construction main substation alone, construct sharing foundation ditch and strut engineering with subway station, can show the engineering investment of constructing underground traction substation.

The utility model discloses a 110kV underground traction substation structure that sets up in trackbound district top can be applied to the underground traction substation of independent construction to measures such as safety, electromagnetism, vibration, noise, and the sensitive whole indoor traction substation in ground of environment helps constructing the new generation traction substation of operation safety and environment friendly and pulls and the main substation of electric power co-construction.

It will be appreciated that the embodiments of the system described above are merely illustrative, in that elements illustrated as separate components may or may not be physically separate, may be located in one place, or may be distributed over different network elements. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of the embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

In addition, it should be understood by those skilled in the art that in the specification of the embodiments of the present invention, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

In the description of the embodiments of the present invention, a large number of specific details are explained. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description. Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the embodiments of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects.

However, the disclosed method should not be interpreted as reflecting an intention that: rather, the claimed embodiments of the invention require more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of an embodiment of this invention.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, and not to limit the same; although the embodiments of the present invention have been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. The utility model provides a 110kV underground traction substation structure that sets up above the track district which characterized in that:

the underground traction power transformer is arranged above a track running area of an underground station of the track traffic, and shares a foundation pit and a supporting project with the underground station;

underground traction substation adopts underground three-layer structure, wherein:

the underground three layers (B3) are cable interlayers, and the bottom plate of the cable interlayer is the top plate of the track area of the track traffic underground station;

at the section of the traction transformer chamber (21), the traction transformer chamber (21) penetrates from the bottom plate of the underground second floor (B2) to the top plate of the underground first floor (B1) upwards, a traction transformer is arranged in the traction transformer chamber, and the traction transformer adopts SF₆A gas-insulated power transformer.

2. The 110kV underground traction substation configuration disposed above a trackbound area of claim 1, wherein:

the system also comprises a total accident oil storage pool (31);

the total accident sump (31) is disposed in the underground third floor (B3).

3. The 110kV underground traction substation configuration disposed above a trackbound area of claim 1, wherein:

the underground traction power transformation adopts a double-layer ground net;

the lower layer of the double-layer ground net is arranged on a bottom plate of a track area of the rail transit underground station, and the upper layer of the double-layer ground net is arranged between the ground surface and a top plate of the track area of the rail transit underground station.

4. The 110kV underground traction substation configuration disposed above a trackbound area of claim 3, wherein:

the double-layer ground net is connected with a building, a structure steel bar, a rail transit underground station building steel bar and a steel bar in a ground connecting wall in the traction substation into a whole.

5. The 110kV underground traction substation configuration disposed above a trackbound area of claim 4, wherein:

the connected whole is a faraday cage.

6. The 110kV underground traction substation configuration disposed above a trackbound area of claim 1, wherein:

the traction transformer adopts a GIT non-gas relay.

7. The 110kV underground traction substation configuration disposed above a trackbound area of claim 1, wherein:

the system also comprises a ventilator room (11);

the ventilator room (11) is arranged in an underground layer (B1), and a fan and an air conditioning unit are arranged in the ventilator room.

8. The 110kV underground traction substation configuration disposed above a trackbound area of claim 7, wherein:

the fan and the air conditioning unit adopt a fan and an air conditioning unit with low-frequency noise below 200 Hz.

9. The 110kV underground traction substation configuration disposed above a trackbound area of claim 7, wherein:

and sound absorption materials are arranged in the traction transformer room (21) and the ventilator room (11).

10. The 110kV underground traction substation configuration disposed above a trackbound area of claim 1, wherein:

the equipment house of the traction transformer room (21) is a class D factory house.

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