Converter station constructed by alternating current and direct current fusion
By constructing AC substations and DC converter stations in a converter station in a converter station, sharing facilities and equipment is solved, and the problem of high investment in land occupation and facilities is achieved, and land saving and cost reduction are achieved.
Patent Information
- Application Number
- CN202422230968.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-09-12
AI Technical Summary
In the prior art, the separate construction of AC substations and DC converter stations leads to problems such as large land occupation and high facility investment.
The AC substation and DC converter station are divided into four areas in one converter station for construction, adopting square arrangements to share facilities and equipment, and reducing equipment configuration.
It reduces land occupation and equipment configuration, reduces construction costs, and improves the integration of facilities and equipment utilization.
Smart Images
Figure CN223230886U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of converter stations, and in particular to a converter station constructed with AC / DC integration. Background Art
[0002] To accelerate the transition to a green, low-carbon energy system, traditional power systems must transform and upgrade from a "source, grid, load, and storage" perspective to a new power system primarily based on renewable energy. DC technology, with its superior characteristics such as fast and flexible power regulation, no increase in system short-circuit capacity, and low losses, has been widely used in long-distance, high-capacity transmission, asynchronous interconnection, and submarine cable transmission. Compared to traditional interconnected long-distance, high-capacity DC transmission technology, "embedded" DC transmission technology locates the converter stations at both the sending and receiving ends within the same AC grid. This typically utilizes existing overhead transmission lines (converting AC to DC) and existing or reserved AC cable channels. This significantly improves the grid's transmission capacity, controllability, and flexibility within the limited space of transmission corridors.
[0003] However, the technical requirements of "embedded" DC are quite different from those of previous DC projects, making it difficult to build and integrate them. The facilities required are different from those of previous DC projects, and the facilities used need to be rebuilt, which occupies a large amount of land and is a large construction project. Utility Model Content
[0004] The purpose of this application is to provide a converter station with AC / DC integration construction, which divides the converter station into four areas, constructing an AC substation and a DC converter station respectively, and building the two in one converter station, saving land. The two share the facilities in the station, reducing equipment configuration and saving investment.
[0005] In order to solve the above technical problems, the following technical solutions are adopted:
[0006] The present application provides a converter station with AC / DC integration construction, including an AC substation and a DC converter station. The converter station is generally arranged in a square shape, and is internally divided into four square areas in two rows and two columns. The four areas are respectively arranged with an AC substation area for building an AC substation and an AC filter area, a converter and DC area, and a pre-station auxiliary area for building a DC converter station; the AC substation area is arranged adjacent to the AC filter area and the pre-station auxiliary area, and the AC substation area is arranged diagonally opposite to the converter and DC area.
[0007] Optionally, the AC substation area adopts a semi-indoor substation layout, an "L"-shaped distribution device building is set up in the AC substation area, and the AC main transformer in the AC substation area adopts an outdoor layout and is arranged in a vacant position on the side of the distribution device building.
[0008] Optionally, the AC filter area adopts an outdoor open equipment layout, and the AC filter area includes a large group of AC filters and a small group of AC filters. The small group of AC filters are arranged on both sides of the large group of AC filters, and one group of the small group of AC filters is adjacent to the AC substation area. The large group busbar of the large group of AC filters is connected to the high-voltage distribution device in the distribution device building using an overhead connecting line; the overhead connecting line connecting the large group busbar and the high-voltage distribution device forms a double-layer cross-line structure with the overhead connecting line used for the incoming line of the large group busbar.
[0009] Optionally, the commutation and DC field area is provided with a DC filter, and the +200KV pole line and the -200KV pole line are symmetrically connected on both sides of the DC filter. The DC filter is connected to the smoothing reactor on both sides through the DC pole line and equipment. The smoothing reactor enters from one side of the valve hall through the DC wall bushing and is connected to the equipment in the valve hall. A converter transformer is arranged on the other side of the valve hall. The converter transformer is arranged in an outdoor straight line, and the valve side bushing of the converter transformer extends into the valve hall and is connected to the equipment inside the valve hall.
[0010] Optionally, an AC power room is provided on the side of the DC filter, and a comprehensive building is provided on the side of the valve hall.
[0011] Optionally, the converter transformer is connected to a high-voltage distribution device in a distribution device building via an overhead connecting line.
[0012] Optionally, the AC substation area and pre-war auxiliary area are respectively arranged on both sides of the station entrance gate, and station roads are provided between the AC substation area, the pre-war auxiliary area, the AC filter area, and the converter and DC areas.
[0013] Optionally, the pre-war auxiliary area is provided with an auxiliary area complex building, a comprehensive water tank and pump room, a spare parts warehouse, a guard room and a parking lot.
[0014] Optionally, both the pre-war auxiliary area and the converter and DC field area are provided with converter transformer spare rooms, and both converter transformer spare rooms are close to the converter transformers in the DC and converter field area.
[0015] Compared with the prior art, the present invention has the following beneficial effects:
[0016] 1. The battery swap station of the present invention includes an area for building an AC substation and an area for building a DC battery swap station. The AC substation and the DC battery swap station are built together to reduce land occupation. The equipment in the two stations can be shared, reducing equipment configuration.
[0017] 2. The AC substation's power distribution equipment, in-building equipment, and AC filters and converter transformers are all connected via overhead cables, eliminating the need for GIL pipes and saving costs. The station's integrated water tank, integrated water pumps, and other auxiliary facilities all share a single set, reducing facility configuration. Each facility is powered by a separate main transformer within the AC substation, simplifying equipment configuration and reducing civil engineering investment. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the planar structure of a converter station constructed with AC / DC integration in one embodiment of the present application.
[0019] Figure 2 This is a simplified diagram of the power system of a converter station in one embodiment of the present application.
[0020] Description of reference numerals:
[0021] 11. Power distribution building; 12. 220kV AC outgoing line; 13. 110kV AC outgoing line; 14. AC main transformer; 15. Overhead connecting line; 16. Overhead connecting line;
[0022] 21. Large group busbar; 22. Small group AC filter;
[0023] 31. Converter transformer; 32. Valve hall; 33. General building; 34. DC wall bushing; 35. Smoothing reactor; 36. Standby smoothing reactor room; 37. DC pole line and equipment; 38. DC filter; 391. +200kV pole line; 392. -200kV pole line;
[0024] 41. Auxiliary area complex building; 42. Spare parts warehouse; 43. Comprehensive water tank; 44. Comprehensive pump room; 45. Guard room; 46. Parking lot; 47. Converter transformer spare room;
[0025] 51. AC power room; 52. Entrance road to the station; 53. Fence; 54. Gate; 55. Road inside the station. DETAILED DESCRIPTION
[0026] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only some embodiments of the present application, rather than all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application, its application, or use.
[0027] Example 1
[0028] This embodiment provides a converter station for AC / DC integration, including an AC substation and a DC converter station, characterized in that the converter station is generally arranged in a square shape, surrounded by a wall 53 on all sides, and is internally divided into four square areas in two rows and two columns. The four areas are respectively arranged with an AC substation area for building an AC substation and an AC filter area, a converter and DC area, and a pre-station auxiliary area for building a DC converter station; the AC substation area is arranged adjacent to the AC filter area and the pre-station auxiliary area, and the AC substation area is arranged diagonally opposite to the converter and DC area.
[0029] A distribution device building 11 and an AC main transformer 14 are arranged in the AC substation area. The distribution device building 11 is an L-shaped structure. The AC main transformer 14 is arranged in the empty position between the long side and the short side of the L-shaped distribution device building 11, and is arranged outdoors. The distribution device building 11 adopts a semi-indoor layout. The first floor is arranged with low-voltage distribution devices, low-voltage shunt capacitors, low-voltage shunt reactors, secondary equipment rooms and auxiliary rooms. The second floor is arranged with substation high-voltage (220KV), medium-voltage (110KV) distribution devices and some low-voltage shunt capacitors.
[0030] The distribution device building has a 220KV AC outgoing line 12 extending outward from the long side and a 110KV AC outgoing line 13 extending outward from the short side.
[0031] The high-voltage and medium-voltage distribution devices utilize indoor GIS equipment, while the low-voltage distribution device utilizes switchgear. The 220 kV AC outgoing line 12 on the high-voltage distribution device utilizes a hybrid of six overhead and cable connections for external wiring, while the 110 kV AC outgoing line 13 on the medium-voltage distribution device utilizes a hybrid of five overhead and cable connections for external wiring. The high-voltage and low-voltage sides of the AC main transformer are connected to the corresponding distribution devices using overhead incoming lines, while the medium-voltage side of the AC main transformer is connected to the corresponding distribution devices using cables. Combined with the overall layout, this maximizes the use of overhead wiring for AC substation incoming and outgoing lines, saving costs.
[0032] The AC substation and DC exchange station are built in one converter station to reduce the space occupied. The internal facilities of the AC substation and DC exchange station are shared, which has high integration, reduces the layout of equipment and reduces construction costs.
[0033] Example 2
[0034] The AC filter area adopts an outdoor open equipment layout, and the AC filter area includes a large group AC filter and a small group AC filter 22. The small group AC filters 22 are arranged on both sides of the large group AC filter, and one group of the small group AC filters 22 is adjacent to the AC substation area. The large group busbar 21 of the large group AC filter is connected to the high-voltage distribution device in the distribution device building using an overhead connecting line 15; the overhead connecting line connecting the large group busbar 21 and the high-voltage distribution device forms a double-layer cross-line structure with the overhead connecting line used for the incoming line of the large group busbar 21.
[0035] Among them, there are 2 large groups of AC filters and 8 small groups of AC filters in the AC filter area. The equipment in the distribution device building is connected to the equipment in the converter and DC area through an overhead connecting line 16, avoiding the use of traditional converter station GIL air pipes and reducing equipment investment.
[0036] The commutation and DC field area is provided with a DC filter 38, and the +200KV pole line 391 and the -200KV pole line 392 are symmetrically connected on both sides of the DC filter 38. The two sides of the DC filter 38 are connected to the smoothing reactor 35 through the DC pole line and equipment 37. The smoothing reactor 35 enters from one side of the valve hall 32 through the DC wall bushing 34 and is connected to the equipment in the valve hall 32. A converter transformer 31 is arranged on the other side of the valve hall 32. The converter transformer 31 adopts an outdoor straight-line arrangement. The valve side bushing of the converter transformer 31 extends into the valve hall 32 and is connected to the internal equipment of the valve hall 32.
[0037] A spare smoothing reactor chamber 36 is provided on the side of the smoothing reactor 35 .
[0038] An AC power room 51 is provided on the side of the DC filter 38. A comprehensive building 33 is also provided on the side of the valve hall 32.
[0039] The AC substation area and the pre-war auxiliary area are respectively arranged on both sides of the station entrance gate 54. An entrance road 52 is provided outside the station entrance gate 54. An internal station road 55 is provided between the AC substation area, the pre-war auxiliary area, the AC filter area, and the converter and DC areas.
[0040] The pre-war auxiliary area includes an auxiliary building 41, a comprehensive water tank 43, a comprehensive pump house 44, a spare parts warehouse 42, a guardhouse 45, and a parking lot 46. A single set of auxiliary facilities is used within the converter station, simplifying equipment configuration and reducing civil engineering costs.
[0041] The pre-war auxiliary area and the converter and DC field area are both provided with converter transformer spare rooms 47 , and both converter transformer spare rooms 47 are close to the converter transformer 31 .
[0042] The AC main transformer 14, each set of AC filters and the converter transformer 31 share a power distribution device building and are connected to each other via overhead connecting lines, which simplifies the equipment configuration.
[0043] like Figure 2 As shown in the figure, it is a simplified diagram of the power supply system of the converter station. A power supply system is set up in the converter station. The working power supply of the internal facilities of the converter station is supplied by the different AC main transformers in the AC substation area. In addition, it is also supplied by an independent external power supply. There are 3 station transformers in the station, and the facilities in the station share a 380V busbar system.
[0044] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.
Claims
1. A converter station with AC / DC integration, comprising an AC substation and a DC converter station, characterized in that: The converter station is generally arranged in a square shape, and is internally divided into four square areas in two rows and two columns. The four areas are respectively arranged with an AC substation area for building an AC substation and an AC filter area for building a DC converter station, a converter and DC area, and a pre-station auxiliary area; the AC substation area is arranged adjacent to the AC filter area and the pre-station auxiliary area, and the AC substation area is arranged diagonally opposite to the converter and DC area.
2. The AC / DC integrated converter station according to claim 1, characterized in that: The AC substation area adopts a semi-indoor substation layout. An "L"-shaped distribution device building is set up in the AC substation area. The AC main transformer in the AC substation area adopts an outdoor layout and is arranged in a vacant position on the side of the distribution device building.
3. The AC / DC integrated converter station according to claim 2, characterized in that: The AC filter area adopts an outdoor open equipment layout, and the AC filter area includes a large group of AC filters and a small group of AC filters. The small group AC filters are arranged on both sides of the large group of AC filters, and one group of the small group AC filters is adjacent to the AC substation area. The large group busbar of the large group of AC filters is connected to the high-voltage distribution device in the distribution device building using an overhead connecting line; the overhead connecting line connecting the large group busbar and the high-voltage distribution device forms a double-layer cross-line structure with the overhead connecting line used for the incoming line of the large group busbar.
4. The AC / DC integrated converter station according to claim 1, characterized in that: The commutation and DC field area is provided with a DC filter, and the +200KV pole line and the -200KV pole line are symmetrically connected on both sides of the DC filter. The DC filter is connected to the smoothing reactor on both sides through the DC pole line and equipment. The smoothing reactor enters from one side of the valve hall through a DC wall bushing and is connected to the equipment in the valve hall. A converter transformer is arranged on the other side of the valve hall. The converter transformer is arranged in an outdoor straight line. The valve side bushing of the converter transformer extends into the valve hall and is connected to the equipment inside the valve hall.
5. The AC / DC integrated converter station according to claim 4, characterized in that: An AC power room is provided on the side of the DC filter, and a comprehensive building is provided on the side of the valve hall.
6. The AC / DC integrated converter station according to claim 4, characterized in that: The converter transformer is connected to the high-voltage power distribution device in the power distribution device building through an overhead connecting line.
7. The AC / DC integrated converter station according to claim 1, characterized in that: The AC substation area and the pre-war auxiliary area are respectively arranged on both sides of the station entrance gate, and station roads are set between the AC substation area, the pre-war auxiliary area, the AC filter area, and the converter and DC areas.
8. The AC / DC integrated converter station according to claim 1, characterized in that: The pre-war auxiliary area is equipped with an auxiliary area complex building, a comprehensive water tank and pump room, a spare parts warehouse, a guard room and a parking lot.
9. The AC / DC integrated converter station according to claim 1, characterized in that: The pre-war auxiliary area and the converter and DC field area are both provided with converter transformer spare rooms, and the two converter transformer spare rooms are both close to the converter transformers in the DC and converter field area.