CN211907960U

CN211907960U - 500kV-220kV composite substation

Info

Publication number: CN211907960U
Application number: CN202020402775.2U
Authority: CN
Inventors: 符国晖; 周军; 李福权; 曹智; 蓝翔; 倪虹妹; 陈卫东; 王晓欢; 王连锋; 孙金
Original assignee: Shenzhen Power Supply Planning Design Institute Co ltd
Current assignee: Shenzhen Power Supply Planning Design Institute Co ltd
Priority date: 2020-03-25
Filing date: 2020-03-25
Publication date: 2020-11-10
Anticipated expiration: 2030-03-25

Abstract

The utility model discloses a 500kV-220kV combined type transformer substation, include: a 500kV main transformer and a 220kV main transformer; a 220kV power distribution device is connected between the 500kV main transformer and the 220kV main transformer; the 220kV power distribution device is a gas insulated fully-closed power distribution device. The utility model discloses a totally closed distribution device of gas insulation connects between 500kV main transformer and the 220kV main transformer, has reduced 220kV distribution device, occupation of land space, equipment investment, simplifies the electric wire netting structure, reduces the electric wire netting trouble.

Description

500kV-220kV composite substation

Technical Field

The utility model belongs to the technical field of the technique of transformer substation and specifically relates to a 500kV-220kV combined type transformer substation is related to.

Background

The rapid development of economic construction brings about the rapid increase of power demand, but the construction and development of power grids are severely restricted due to the insufficient land supply of certain urban public facilities. At present, the site selection of a transformer substation faces the problems of insufficient land utilization, difficult station location finding, difficult line outlet corridor implementation and the like.

Aiming at the current situation that a proper alternative station needs to be provided, the transformer substation needs to be in contact with a 500kV backbone power grid and also needs to be responsible for supplying power to a peripheral 10kV distribution network. The 500kV transformer substation is generally a hub transformer substation, can be used as a connection point for large and medium-sized power plants to be connected into a power grid, can be used as a connection point between adjacent power systems, and can be used as a main power supply of a 220kV voltage power grid, but the low-voltage side of the conventional 500kV transformer substation is not externally supplied with power and only used for reactive compensation. The 220kV transformer substation is generally a regional transformer substation, provides a power supply for a 110kV power grid and supplies power for 10kV (or 35kV) loads around the transformer substation.

Therefore, the 500kV-220kV combined transformer substation can be used as a contact point of a 500kV power system and can provide power for peripheral 110kV and 10kV (or 35kV), and is suitable for urban development.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving the technical problem who exists among the prior art at least. Therefore, the utility model provides a 500kV-220kV combined type transformer substation can practice thrift and reduce area, reduces 220kV GIS equipment, reduces the equipment investment, simplifies the electric wire netting structure, reduces the electric wire netting trouble.

An embodiment of the utility model provides a 500kV-220kV combined type transformer substation, include: a 500kV main transformer and a 220kV main transformer;

a 220kV power distribution device is connected between the 500kV main transformer and the 220kV main transformer;

the 220kV power distribution device is a gas insulated fully-closed power distribution device.

The utility model discloses 500kV-220kV combined type transformer substation has following beneficial effect at least: the 500kV-220kV transformer substation can be used as a connecting point for large and medium-sized power plants to be connected into a power grid, can be used as a contact point between adjacent power systems, can be used as a main power supply of the 220kV voltage power grid, can provide power for the 110kV power grid and supplies power for 10kV (or 35kV) loads around the transformer substation, and the two independent transformer substations are combined into the 500kV-220kV combined GIS transformer substation scheme, so that the floor area of the transformer substation can be greatly reduced, the land acquisition cost is reduced, 220kV GIS equipment is combined, the equipment investment is reduced, the power grid structure is simplified, and the power grid faults are reduced.

According to the utility model discloses a 500kV-220kV combined type transformer substation of other embodiments, 500kV main transformer sets up four, 220kV distribution device sets up 220kV and is qualified for the next round of competitions, four 220kV main transformer and four 500kV main transformer connects respectively 220kV distribution device's 220kV is qualified for the next round of competitions.

According to the utility model discloses a 500kV-220kV combined type transformer substation of other embodiments, 220kV distribution device is equipped with 12 ~ 20 and is qualified for the next round of competitions.

According to the utility model discloses a 500kV-220kV combined type transformer substation of other embodiments, 500kV main transformer is connected with 500kV distribution device and 35kV distribution device, 500kV distribution device is connected with the first line of being qualified for the next round of competitions, 35kV distribution device is connected with the second and is qualified for the next round of competitions.

According to the utility model discloses a 500kV-220kV combined type transformer substation of other embodiments, 220kV is qualified for the next round of competitions for two subsection wiring of double bus.

According to the utility model discloses a 500kV-220kV combined type transformer substation of other embodiments, 220kV main transformer is connected with 110kV distribution device and 10kV distribution device, 110kV distribution device is connected with the third and is qualified for the next round of competitions, 10kV distribution device is connected with the fourth and is qualified for the next round of competitions.

According to the utility model discloses a 500kV-220kV combined type transformer substation of other embodiments, the first line of being qualified for the next round of competitions is qualified for the next round of competitions for 500kV, the second is qualified for the next round of competitions for 35 kV.

According to the utility model discloses a 500kV-220kV combined type transformer substation of other embodiments, the third is qualified for the next round of competitions for 110kV, and the fourth is qualified for the next round of competitions for 10 kV.

According to another embodiment of the present invention, in a 500kV-220kV compound substation, the 500kV outgoing line is a half-breaker wiring, the 35kV outgoing line is a single-bus unit wiring, and the 110kV outgoing line is a double-bus double-division wiring; the 10kV outgoing line is a single-bus sectional wiring.

Drawings

Fig. 1 is a wiring diagram of a specific embodiment of a 500kV-220kV compound substation in the embodiment of the present invention;

FIG. 2 is an enlarged schematic view of A of FIG. 1;

FIG. 3 is an enlarged schematic view of B of FIG. 1;

FIG. 4 is an enlarged schematic view of C of FIG. 1;

FIG. 5 is an enlarged schematic view of D of FIG. 1;

fig. 6 is an enlarged schematic view of E in fig. 1.

Reference numerals: 100. a 500kV main transformer; 200. a 220kV main transformer; 300. a 220kV power distribution unit; 400. a 220kV outgoing line; 500. 500kV power distribution equipment; 510. a first outgoing line; 600. a 35kV power distribution unit; 610. a second outgoing line; 700. a 110kV power distribution device; 710. a third outgoing line; 800. a 10kV power distribution unit; 810. and a fourth outgoing line.

Detailed Description

The conception and the resulting technical effects of the present invention will be described clearly and completely with reference to the following embodiments, so that the objects, features and effects of the present invention can be fully understood. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention.

In the description of the present invention, if an orientation description is referred to, for example, the directions or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, only for convenience of description and simplification of description, and it is not intended to 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. If a feature is referred to as being "disposed," "secured," "connected," or "mounted" to another feature, it can be directly disposed, secured, or connected to the other feature or indirectly disposed, secured, connected, or mounted to the other feature.

In the description of the embodiments of the present invention, if "a plurality" is referred to, it means one or more, if "a plurality" is referred to, it means two or more, if "greater than", "less than" or "more than" is referred to, it is understood that the number is not included, and if "more than", "less than" or "within" is referred to, it is understood that the number is included. If reference is made to "first" or "second", this should be understood to distinguish between features and not to indicate or imply relative importance or to implicitly indicate the number of indicated features or to implicitly indicate the precedence of the indicated features.

Referring to fig. 1, a wiring diagram of a specific embodiment of a 500kV-220kV compound substation in the embodiment of the present invention is shown. The embodiment of the utility model discloses 500kV-220kV combined type transformer substation, include: a 500kV main transformer 100, a 220kV main transformer 200, a 220kV power distribution unit 300; the 220kV distribution device 300 is connected between the 500kV main transformer 100 and the 220kV main transformer 200. Wherein the 500kV main transformer 100 is used as an important component of a 500kV transformer substation, and the 500kV transformer substation is generally a hub transformer substation. The 220kV main transformer 200 is an important component of a 220kV substation, and the 220kV substation is generally a regional substation. The 500kV main transformer 100 is connected with 500kV power distribution devices 500 and 35kV power distribution devices 600, and the 35kV power distribution devices 600 may be replaced with 65kV power distribution devices. The 500kV power distribution device 500, the 220kV power distribution device 300, the 65kV power distribution device or the 35kV power distribution device are connected through the 500kV main transformer 100 to realize the output of a plurality of grades of voltages, so that the transmission can be carried out according to different voltage requirements. The 220kV main transformer 200 is connected with a 110kV power distribution device 700 and a 10kV power distribution device 800, the 10kV power distribution device 800 can be replaced by a 35kV power distribution device 600, and the 220kV power distribution device 300, the 110kV power distribution device 700, the 35kV power distribution device 600 or the 10kV power distribution device 800 are connected through the 220kV main transformer to achieve voltage output of different levels. Wherein, connect 220kV main transformer 200 and 500kV main transformer 100 through 220kV distribution device 300 and can merge the function that 500kV transformer substation and 220kV transformer substation contain, and originally 500kV transformer substation and 220kV transformer substation are connected with 220kV distribution device 300 respectively, only need a 220kV distribution device 300 after merging construction with 500kV transformer substation and 220kV transformer substation, saved a 220kV distribution device 300 to save the investment, simplify the network structure purpose.

Referring to fig. 1 and 2, there are three main types of high voltage power distribution devices. The first is air-insulated conventional power distribution equipment, referred to as AIS for short, in which the outgoing line is exposed to be directly contacted with air, and the circuit breaker can be of a porcelain column type or a tank type. The second is a hybrid power distribution device, called H-GIS for short, the outgoing line adopts an open type, and the others are sulfur hexafluoride gas insulation switch devices. The third is a GAS insulated totally enclosed SWITCHGEAR, which is called GAS-insulated SWITCHGEAR for short GIS. The 220kV power distribution device 300 employs a third type of high-voltage power distribution device, which is a gas-insulated fully-closed power distribution device, and specifically a sulfur hexafluoride gas-insulated fully-closed power distribution device, referred to as GIS for short. The GIS has the advantages of compact structure, small occupied area, high reliability, flexible configuration, convenient installation, strong safety, strong environment adaptability and small maintenance workload, and the maintenance interval of main parts is not less than 20 years. The gas-insulated fully-closed power distribution device is adopted for the 220kV power distribution device 300, the occupied area is reduced by 60% compared with that of the traditional 220kV power distribution device 300, and the space position of a transformer substation is saved.

Referring to fig. 1 and 3, in this embodiment, the 500kV distribution device 500 is arranged in an indoor GIS manner in a Z-type manner, and the 500kV distribution device is connected with a first outgoing line 510, the first outgoing line 510 is a 500kV outgoing line, 8 outgoing lines are provided for the 500kV outgoing line, and the 500kV outgoing line is a wiring of a half breaker. The 200kV power distribution device is arranged in an indoor GIS single-row medium mode and is connected with 220kV outgoing lines 400, 4 outgoing lines 400 are arranged on the 220kV outgoing lines, and the 4 outgoing lines 400 of the 220kV outgoing lines are double-bus double-subsection wiring. The 220kV power distribution device is provided with 12-20 outgoing lines, and the 12-20 outgoing lines are mixed outgoing lines by adopting overhead cables.

Referring to fig. 1 and 5, the 110kV distribution device 700 is connected with a third outgoing line 710, the third outgoing line 710 is a 110kV outgoing line, and the 110kV outgoing line is a double-bus double-segment connection line.

Referring to fig. 1 and 4, the 35kV distribution device 600 or the 65kV distribution device is connected with a second outgoing line 610, and the 35kV distribution device 600 adopts an outdoor conventional open-type equipment tank-type circuit breaker scheme, and adopts a double-row medium-sized arrangement supporting hard pipe outgoing lines. When the second outgoing line 610 connected with the 35kV power distribution device 600 is a 35kV outgoing line, the second outgoing line 610 connected with the 65kV power distribution device is a 65kV outgoing line. And the 35kV outgoing line or the 65kV outgoing line is a single bus unit wiring.

Referring to fig. 1 and 6, a fourth outgoing line 810 is connected to the 10kV distribution device 800 or the 35kV distribution device 600, the fourth outgoing line 810 connected to the 10kV distribution device 800 is a 10kV outgoing line, and the fourth outgoing line 810 at the connection end of the 35kV distribution device 600 is a 35kV outgoing line. The 10kV outgoing line is a single bus sectional wiring.

In this embodiment, 4 outgoing lines 400 of 220kV are provided, 4 outgoing lines 200 of 220kV are provided, and 4 outgoing lines 400 of 500kV are provided for the main transformer 100 of 500kV, and the 4 outgoing lines 400 of 220kV are respectively connected to the 4 main transformers 200 of 220kV and the 4 main transformers 100 of 500kV, and are connected at intervals. Because the 500kV transformer substation and the 220kV transformer substation are adjacent to each other and have short electrical distance, only one 220kV power distribution device 300 is adopted to connect the 500kV transformer substation and the 220kV transformer substation, so that extra power distribution devices are saved, and the whole co-constructed transformer substation is simplified.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

Claims

1. A500 kV-220kV composite substation is characterized by comprising: a 500kV main transformer and a 220kV main transformer;

2. The 500kV-220kV combined type transformer substation of claim 1, wherein four 500kV main transformers are arranged, four 220kV main transformers are arranged, a 220kV power distribution device is provided with 220kV outgoing lines, and the four 220kV main transformers and the four 500kV main transformers are respectively connected with the 220kV outgoing lines of the 220kV power distribution device.

3. The 500kV-220kV combined substation of claim 1, wherein the 220kV distribution device is provided with 12-20 outgoing lines.

4. The 500kV-220kV compound substation according to claim 1, wherein the 500kV main transformer is connected with a 500kV power distribution device and a 35kV power distribution device, the 500kV power distribution device is connected with a first outgoing line, and the 35kV power distribution device is connected with a second outgoing line.

5. The 500kV-220kV compound substation of claim 2, wherein the 220kV outgoing line is a double-bus double-section wiring.

6. The 500kV-220kV compound substation according to claim 4, wherein a 110kV power distribution device and a 10kV power distribution device are connected to the 220kV main transformer, a third outgoing line is connected to the 110kV power distribution device, and a fourth outgoing line is connected to the 10kV power distribution device.

7. The 500kV-220kV compound substation of claim 6, wherein the first outgoing line is a 500kV outgoing line, and the second outgoing line is a 35kV outgoing line.

8. The 500kV-220kV compound substation of claim 7, wherein the third outgoing line is a 110kV outgoing line, and the fourth outgoing line is a 10kV outgoing line.

9. The 500kV-220kV composite substation of claim 8, wherein the 500kV outgoing line is a half-breaker connection, the 35kV outgoing line is a single-bus unit connection, and the 110kV outgoing line is a double-bus double-section connection; the 10kV outgoing line is a single-bus sectional wiring.