Pivot-built substation system

Abstract

The utility model discloses a hub combined substation system which comprises a traction substation and a power distribution station, and the traction substation and the power distribution station are arranged in independent houses and located on the two sides of a combined substation. The traction substation is connected with the traction transformer through a 27.5 kV high-voltage cable, and the 27.5 kV high-voltage cable is arranged in a 27.5 kV high-voltage cable trench; the power distribution station is connected with the power transformer through a 10kV high-voltage cable, and the 10kV high-voltage cable is arranged in a 10kV high-voltage cable trench; and the traction transformer and the power transformer are connected with an inlet wire of a combined substation through a high-voltage combined electric appliance and are connected with an external power supply. The hub-built substation system provided by the utility model can effectively isolate faults of a traction power supply system and an electric power supply system, and the reliability of the hub-built substation system is improved.

Description

Technical Field

[0001] The present application relates to the technical field of power supply and transformation engineering for electrified railways, and more specifically, to a hub-to-hub integrated substation system. Background Art

[0002] In railway hubs, in order to meet the needs of traction and power supply, hub traction substations and power distribution stations need to be set up to supply power to various railway lines, yards and station buildings. In order to reasonably utilize the power supply interval outside the power system, the existing power supply system often requires the traction substation and power distribution station to be co-located in railway hubs to share the external power supply of the power system.

[0003] However, the existing traction substation and power distribution station co-located will result in some electrical equipment being arranged in the same house, using a secondary layout structure with a cable interlayer. This layout will inevitably lead to the problem of 27.5kV and 10kV high-voltage cables crossing in space. When a traction or power supply system equipment fails, it will affect the equipment of the other system, causing the scope of the fault to expand and reducing the power supply reliability of the hub co-built substation. Utility Model Content

[0004] In view of at least one defect or improvement demand of the prior art, the utility model provides a hub-to-hub integrated substation system, which can solve at least one of the problems existing in the above-mentioned prior art.

[0005] To achieve the above-mentioned object, according to the first aspect of the utility model, a hub-to-hub combined substation system is provided, the hub-to-hub combined substation system comprises a traction substation and a power distribution station, the traction substation and the power distribution station are respectively arranged in independent houses, located on both sides of the combined substation;

[0006] The traction substation is connected to the traction transformer via a 27.5 kV high voltage cable, and the 27.5 kV high voltage cable is arranged in a 27.5 kV high voltage cable trench;

[0007] The power distribution station is connected to the power transformer via a 10kV high-voltage cable, and the 10kV high-voltage cable is arranged in a 10kV high-voltage cable trench;

[0008] The traction transformer and the power transformer are connected to the incoming line of the jointly built substation via a high-voltage combined electrical appliance to receive an external power supply.

[0009] Furthermore, the above-mentioned hub-combined substation system also includes a low-voltage cable trench, which is used to arrange low-voltage cables, and the low-voltage cables are used to connect the traction substation and the high-voltage combined electrical appliance.

[0010] Furthermore, in the above-mentioned hub combined substation system, the main connection between the external power supply and the combined substation incoming line adopts line transformer group connection or internal bridge connection.

[0011] Furthermore, the above-mentioned hub is combined with a substation system, and the external power supply adopts a voltage level of 220kV or 110kV.

[0012] Furthermore, the above-mentioned hub-to-hub integrated substation system has an overall plan layout that adopts an overhead incoming line or a cable incoming line method.

[0013] Furthermore, the above-mentioned hub-built substation system is characterized in that the traction substation adopts a one-story building layout with a cable mezzanine, including a 27.5kV high-voltage room, a secondary equipment room, a maintenance room and an emergency duty room.

[0014] Furthermore, the above-mentioned hub jointly builds a substation system, and the power distribution station adopts a one-story building layout with a cable mezzanine, including a 10kV high-voltage room, a small resistance reception room, a reactive power compensation room, a self-use transformer room, a secondary equipment room, a maintenance room and an emergency duty room.

[0015] Furthermore, the above-mentioned hub is combined with a substation system, and the high-voltage combined electrical appliances, traction transformers and power transformers are arranged outdoors.

[0016] In general, the above technical solutions conceived by the utility model can achieve the following beneficial effects compared with the prior art:

[0017] The utility model provides a hub-to-hub combined substation system, in which 27.5kV and 10kV side high-voltage equipment are arranged in independent houses and operate independently without affecting each other, and the 27.5kV high-voltage cable trench and the 10kV high-voltage cable trench are independently arranged without crossing each other, which can effectively isolate faults of the traction power supply system and the electric power supply system and improve the reliability of the hub-to-hub combined substation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the plan layout of a hub-to-hub integrated substation system provided in an embodiment of the present application.

[0020] Figure numerals: 1. Traction substation; 2. Power distribution station; 3. Incoming line of combined substation; 4. High-voltage combined electrical appliance; 5. Traction transformer; 6. Power transformer; 7. Low-voltage cable trench; 8. 27.5kV high-voltage cable trench; 9. 10kV high-voltage cable trench. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0022] The terms "first", "second", "third", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0023] Figure 1 is a schematic diagram of a hub-to-hub substation system layout provided in an embodiment of the present application, such as Figure 1 As shown, the hub combined substation system includes a traction substation (1) and a power distribution station (2), wherein the traction substation (1) and the power distribution station (2) are respectively arranged in independent houses and located on both sides of the combined substation;

[0024] The traction substation (1) is connected to the traction transformer (5) via a 27.5 kV high-voltage cable, and the 27.5 kV high-voltage cable is arranged in a 27.5 kV high-voltage cable trench (8);

[0025] The power distribution station (2) is connected to the power transformer (6) via a 10 kV high voltage cable, and the 10 kV high voltage cable is arranged in a 10 kV high voltage cable trench (9);

[0026] The traction transformer (5) and the power transformer (6) are connected to the combined substation incoming line (3) via the high-voltage combined electrical appliance (4) to receive an external power supply.

[0027] Specifically, the combined substation is connected to two 220kV / 110kV external power supplies from the power system, the main connection on the high-voltage side adopts a line transformer group or internal bridge connection, two power transformers (6) are operated in parallel, and two traction transformers (5), one of which is in operation and the other is used as a standby. The traction transformer (5) can be selected as a three-phase VV, an impedance matching transformer or a transformer group consisting of two single-phase transformers as needed.

[0028] The general layout of the hub's combined substation meets the requirement of external power supply using overhead lines or cable lines.

[0029] The high-voltage side combined electrical equipment, traction transformer (5), and power transformer (6) of the hub substation are arranged outdoors. The traction substation (1) is arranged in a one-story building with a mezzanine, equipped with a 27.5kV high-voltage room, secondary equipment room, maintenance room, and emergency duty room, meeting the requirements for the layout, maintenance, and inspection of the traction power supply system equipment. The power distribution room is arranged in a one-story building with a cable mezzanine, equipped with a 10kV high-voltage room, a small resistance reception room, a reactive power compensation room, a self-use transformer room, a secondary equipment room, a maintenance room, and an emergency duty room, meeting the requirements for the layout, maintenance, and inspection of the power supply system equipment.

[0030] The high-voltage side combined electrical protection control cable is introduced into the traction substation (1) through the low-voltage cable trench (7), and the low-voltage side high-voltage cable of the traction transformer (5) is introduced into the traction substation (1) through the 27.5kV high-voltage cable. The low-voltage side high-voltage cable of the power transformer (6) is introduced into the power distribution station (2) through the 10kV high-voltage cable trench (9). The 27.5kV high-voltage cable trench (8), the 10kV high-voltage cable trench (9) and the outdoor combined electrical low-voltage cable trench (7) are all independently arranged and do not cross each other. When any one of the lines or equipment fails, the fault range will not expand to other equipment, and the impact range is smaller, that is, when some equipment or lines fail, other equipment can still operate normally, thereby improving the reliability of the combined substation system.

[0031] The high-voltage combined electrical equipment (4), traction transformer (5) and power transformer (6) of the combined substation are arranged outdoors, which is economical in project investment and convenient for maintenance and management.

[0032] The utility model provides a hub-to-hub combined substation system, in which 27.5kV and 10kV side high-voltage equipment are arranged in independent houses and operate independently without affecting each other, and the 27.5kV high-voltage cable trench and the 10kV high-voltage cable trench are independently arranged without crossing each other, which can effectively isolate faults of the traction power supply system and the electric power supply system and improve the reliability of the hub-to-hub combined substation system.

[0033] Optionally, a hub-to-hub integrated substation system provided in an embodiment of the present application further includes a low-voltage cable trench (7), wherein the low-voltage cable trench (7) is used to arrange low-voltage cables, and the low-voltage cables are used to connect the traction substation (1) and the high-voltage combined electrical appliance (4).

[0034] Optionally, in a hub combined substation system provided by an embodiment of the present application, the main connection between the external power supply and the combined substation incoming line (3) adopts line transformer group connection or internal bridge connection.

[0035] Optionally, in an embodiment of the present application, a hub-to-hub integrated substation system is provided, wherein the external power supply adopts a voltage level of 220kV or 110kV.

[0036] Optionally, an embodiment of the present application provides a hub-to-hub integrated substation system, wherein the overall layout of the hub-to-hub integrated substation system adopts an overhead line or cable line approach.

[0037] Optionally, in a hub-to-hub integrated substation system provided in an embodiment of the present application, the traction substation (1) is arranged in a one-story building with a cable mezzanine, including a 27.5 kV high-voltage room, a secondary equipment room, a maintenance room and an emergency duty room.

[0038] Optionally, in a hub-to-hub integrated substation system provided in an embodiment of the present application, the power distribution station (2) adopts a one-story building layout with a cable mezzanine, including a 10kV high-voltage room, a low-resistance reception room, a reactive power compensation room, a self-use transformer room, a secondary equipment room, a maintenance room and an emergency duty room.

[0039] Optionally, in a hub-to-hub integrated substation system provided in an embodiment of the present application, the high-voltage combined electrical appliance (4), the traction transformer (5) and the power transformer (6) are arranged outdoors.

[0040] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0041] The above is only an exemplary embodiment of the present disclosure, and the scope of the present disclosure cannot be limited thereto. That is, any equivalent changes and modifications made according to the teachings of the present disclosure are still within the scope of the present disclosure. After considering the specification and practicing the disclosure here, those skilled in the art will easily think of the implementation scheme of the present disclosure. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the technical field not recorded in the present disclosure. The description and examples are regarded as exemplary only, and the scope and spirit of the present disclosure are defined by the claims.

[0042] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0043] It is easy for those skilled in the art to understand that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hub-to-hub combined substation system, characterized in that: The hub combined substation system includes a traction substation and a power distribution station, wherein the traction substation and the power distribution station are arranged in independent houses and located on both sides of the combined substation; The traction substation is connected to the traction transformer via a 27.5 kV high voltage cable, and the 27.5 kV high voltage cable is arranged in a 27.5 kV high voltage cable trench; The power distribution station is connected to the power transformer via a 10kV high-voltage cable, and the 10kV high-voltage cable is arranged in a 10kV high-voltage cable trench; The traction transformer and the power transformer are connected to the incoming line of the jointly built substation via a high-voltage combined electrical appliance to receive an external power supply.

2. The hub-to-hub integrated substation system according to claim 1, characterized in that: It also includes a low-voltage cable trench, which is used to arrange low-voltage cables, and the low-voltage cables are used to connect the traction substation and the high-voltage combined electrical appliance.

3. The hub-to-hub integrated substation system according to claim 1, characterized in that: The main connection between the external power supply and the incoming line of the jointly built substation adopts line transformer group connection or internal bridge connection.

4. The hub-to-hub integrated substation system according to claim 1, characterized in that: The external power supply adopts a voltage level of 220kV or 110kV.

5. The hub-to-hub integrated substation system according to claim 1, characterized in that: The general layout of the hub combined substation system adopts overhead line or cable line.

6. The hub-to-hub integrated substation system according to claim 1, characterized in that: The traction substation adopts a one-story building layout with a cable mezzanine, including a 27.5kV high-voltage room, a secondary equipment room, a maintenance room and an emergency duty room.

7. The hub-to-hub integrated substation system according to claim 1, characterized in that: The power distribution station adopts a one-story building layout with a cable mezzanine, including a 10kV high-voltage room, a small resistance reception room, a reactive power compensation room, a self-use transformer room, a secondary equipment room, a maintenance room and an emergency duty room.

8. The hub-to-hub integrated substation system according to claim 1, characterized in that: The high-voltage combined electrical appliances, traction transformers and power transformers are arranged outdoors.

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