CN204741210U - Two integrative transformer underground substations of 35kV - Google Patents

Abstract

The utility model provides a two integrative transformer underground substations of 35kV, the transformer substation is equipped with two layers secret one decks, underground, the underground one deck is equipped with 10kV capacitor chamber, master -control room, the change of 10kV ground connection and arc suppressing coil room, the underground is equipped with 35kV electricity distribution room, 10kV electricity distribution room, two fan room that are used for setting up the transformer room of the integrative transformer of 35kV and are used for setting up exhaust device for two layers, the transformer substation still is equipped with the downcast, the downcast link up from ground is vertical underground one deck and two layers underground, and set up two between the transformer room, it utilizes to advance exhaust device the downcast is right the transformer substation takes a breath.

Description

A 35kV underground substation with two integrated transformers

technical field

The utility model relates to the field of substation structure design, in particular to an underground substation with 35kV two integrated transformers.

Background technique

The substation is the place where the voltage is changed, controlled and distributed. The transformer is the main equipment of the substation. In addition, the substation also includes power distribution equipment, energy storage equipment, secondary equipment and other equipment.

In urban areas where people are densely populated and power loads are concentrated but the land is tight, it is required to save land and reduce noise. The construction of above-ground substations occupies a large area, which is not suitable for the planning and construction of modern power grids. Moreover, the designer designs the structure of the substation according to the pre-planned land area, which will cause great differences in the structure of each substation, and the designed substation may not be suitable for the surrounding conditions. cables are messed up.

Utility model content

Therefore, the technical problem to be solved by the utility model is to provide a standard structure of an underground substation to save land area, reduce the impact on the surrounding environment, and reduce the resistance of substation construction in urban areas.

The utility model provides an underground substation with two integrated transformers of 35kV. The substation is provided with a basement floor and a second floor; the basement floor is provided with a 10kV capacitor room, a main control room, a 10kV grounding transformer and an arc suppression coil room. , the second basement floor is equipped with a 35kV power distribution room, a 10kV power distribution room, two transformer rooms for setting 35kV integrated transformers, and a fan room for setting air intake and exhaust devices;

The substation is also provided with an air intake shaft, which vertically passes through the first basement and the second basement from the ground, and is arranged between the two transformer rooms. The air intake and exhaust device utilizes the The air intake shaft is used to ventilate the substation.

Preferably, the transformer room is a full-height structure.

Preferably, the substation is further provided with a half layer of cables, and the half layer of cables is arranged under the second underground floor for laying power cables.

Preferably, the substation is further provided with at least one cable shaft, the cable shaft vertically penetrates the first basement and the second basement from the ground, and is arranged on a side inside the substation for installing power cables.

Preferably, the substation is further provided with a cable interlayer, and the cable interlayer is arranged between the main control room and the 35kV power distribution room for laying power cables.

Preferably, the power cable is connected to corresponding equipment through a cable tray.

Preferably, the wall of the transformer room is a firewall.

Compared with the existing technology, the 35kV two integrated transformer underground substation provided by the utility model adopts an indoor underground structure design, which can reduce noise and conform to urban planning; Provide air; the layout of the substation can save space, thereby saving land investment, and at the same time speed up the design and construction of regional power grid projects, improve the quality of construction, and promote the construction of a resource-saving and environment-friendly society.

Description of drawings

In order to make the content of the utility model easier to understand clearly, the utility model will be described in further detail below according to specific embodiments of the utility model in conjunction with the accompanying drawings, wherein

Fig. 1 is a planar structure diagram of the first floor of the 35kV split transformer whole indoor two-story substation provided by the embodiment of the utility model;

Fig. 2 is the second floor plan structure diagram of the 35kV split transformer whole indoor two-story substation provided by the embodiment of the utility model;

Fig. 3 is an overall side view of the 35kV split transformer whole indoor two-story substation provided by the embodiment of the utility model.

Detailed ways

The embodiment of the utility model provides an underground substation with two integrated transformers of 35kV, including the first floor and the second floor underground. Fig. 1, Fig. 2 and Fig. 3 show the structure of the substation provided by the utility model, which is described in the utility model The equipment in each equipment room and device room are common equipment in the substation. Those skilled in the art can understand the connection relationship between each equipment, so the connection cables between each equipment are omitted in the figure. As shown in Figure 3, all structures and equipment in the substation provided by the present embodiment are located below the ground 30, specifically, as shown in Figure 1, the subterranean floor of the substation is provided with: 10kV capacitor room 11, main control room 12. 10kV grounding substation and arc suppressing coil room 13; as shown in Figure 2, the second underground floor of the substation is equipped with: 35kV power distribution room 21, 10kV power distribution room 22, and two transformers for setting 35kV integrated transformers The room 23 and the fan room for setting the air intake and exhaust device 24, in order to improve the safety of the substation, the wall of the transformer room 23 can preferably be a firewall.

The transformer substation is also provided with a transformer air intake shaft 10, which vertically penetrates the first basement and the second basement floor from the ground, and is arranged between the two transformer rooms 23. The device uses the air inlet shaft 10 to ventilate the substation, that is, adopts the method of convection heat dissipation, and exchanges heat with each equipment inside the substation, especially the transformer in the transformer room through the gas flow, so as to achieve the purpose of heat dissipation, and at the same time Air can also be provided for the space inside the station. Those skilled in the art can understand that in order to enhance the ventilation effect, it is also feasible to arrange more air shafts in the substation, for example, they can be arranged at the pedestrian passages in the substation.

The above-mentioned substation has 2 incoming lines and 20 outgoing lines. The wiring method is to use inner bridge wiring on the 35kV side, and single-bus section wiring on the 10kV side. Among them, the transformer adopts 35kV double-winding integrated transformer, each with a capacity of 31.5MVA, and is arranged indoors; the 35kV power distribution device includes indoor switch cabinets arranged in a single row, and the cables go out; the 10kV power distribution device includes indoor switch cabinets arranged in double rows, and the cables go out. The capacitor is preferably a reactive power compensation capacitor in the station, installed on the 10kV side, with a capacity of 2×(2+2)Mvar, and the cable enters the line. The 10kV small current grounding system adopts a complete set of grounding transformers and arc suppression coils. The grounding transformer has a capacity of 400kVA, of which the grounding transformer is also used as a station transformer, and the cable enters the line.

The substation's substation secondary scheme includes:

(1) Transformers, such as conventional transformers, may not be equipped with a merging unit or an intelligent terminal;

(2) The 35kV and main transformer adopts an integrated protection, measurement and control device, and the 10kV adopts an all-in-one device for protection, measurement and control, and measurement;

(3) Equipped with independent standby automatic switching and low cycle load shedding device;

(4) The integrated power supply system in the station is adopted.

The underground substation of 35kV two integrated transformers provided by the utility model adopts an indoor underground structure design, which can reduce noise and conform to urban planning; the substation realizes heat dissipation of the transformer through the air inlet shaft and provides air to the station at the same time; the layout of the substation It can save space, thereby saving land investment, speeding up the design and construction of regional power grid projects, improving the quality of construction, and promoting the construction of a resource-saving and environment-friendly society.

In order to further improve the heat dissipation effect of the equipment in the transformer room, thereby improving the safety of the substation, the transformer room 23 can be preferably a double-height structure, and the full-height is also called the sky, which belongs to the term of the construction field and means the upper floor of the two-story building There is no floor, and the bottom directly leads to the top. This structure is conducive to the heat dissipation of indoor equipment.

In order to further optimize the cable layout in the substation, the substation can also be provided with at least one cable shaft 14, the cable shaft 14 vertically penetrates the first and second underground floors from the ground, and is arranged inside the substation side for setting the power cables.

As shown in Figure 3, the substation can also be provided with a cable half-layer 31, and the cable half-layer 31 is arranged below the second underground floor for laying primary and secondary power cables, that is, the cable half-layer 31 is also installed under the second underground floor. A space is provided, which is used solely for the penetration of cables; the substation can also be provided with a cable interlayer 32, and the cable interlayer 32 is arranged between the main control room 12 and the 35kV power distribution room 21 for laying A power cable, and the above-mentioned power cable can be connected to corresponding equipment through a cable tray.

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the scope of protection of the utility model.

Claims (7)

1. An underground substation with two integrated transformers of 35kV is characterized in that the substation is provided with a basement level and a basement level; the basement level is provided with a 10kV capacitor room, a main control room, a 10kV grounding transformer and arc suppression In the coil room, the second basement floor is equipped with a 35kV power distribution room, a 10kV power distribution room, two transformer rooms for installing 35kV integrated transformers, and a fan room for installing air intake and exhaust devices; The substation is also provided with an air intake shaft, which vertically passes through the first basement and the second basement from the ground, and is arranged between the two transformer rooms. The air intake and exhaust device utilizes the The air intake shaft is used to ventilate the substation. 2. The substation according to claim 1, characterized in that, the transformer room is a double-height structure. 3. The substation according to claim 1, characterized in that, the substation is further provided with a half layer of cables, and the half layer of cables is arranged below the second underground floor for laying power cables. 4. The substation according to claim 1, characterized in that, the substation is also provided with at least one cable shaft, the cable shaft vertically penetrates the first basement and the second basement from the ground, and is arranged in the The side inside the substation where the power cables are located. 5. The substation according to claim 1, characterized in that, the substation is also provided with a cable interlayer, and the cable interlayer is arranged between the main control room and the 35kV power distribution room for laying power cables . 6. The substation according to any one of claims 3-5, characterized in that the power cables are connected to corresponding equipment through cable trays. 7. The substation according to any one of claims 1-5, characterized in that, the wall of the transformer room is a firewall.