A direct current transformer valve hall arrangement

Abstract

The application relates to a direct-current transformer valve hall arrangement structure which adopts the technical scheme that: a direct-current transformer valve hall arrangement structure is characterized in that the valve hall is internally arranged with positive and negative electrode valves of a direct-current transformer; one side of the valve hall is a low-voltage direct-current incoming line end; the other side is a high-voltage direct-current incoming line end and a common incoming line end; and each incoming line end is connected with an external device through a wall or floor sleeve at different positions of the valve hall. The positive and negative electrode valves of the direct-current transformer are arranged in the valve hall, the arrangement is reasonable and compact, the space utilization rate is high, and the valve hall space is saved.

Description

Technical Field

[0001] This invention relates to the field of power engineering technology, specifically to a valve hall arrangement structure for a DC transformer. Background Technology

[0002] Patent CN112636611A discloses a valve hall arrangement structure for a marine flexible DC converter station, including two valve halls arranged symmetrically. One valve hall contains a positive A-phase bridge arm, a positive B-phase bridge arm, and a positive C-phase bridge arm, while the other valve hall contains a negative A-phase bridge arm, a negative B-phase bridge arm, and a negative C-phase bridge arm. The six bridge arms in the two valve halls are arranged symmetrically in an "ABCCBA" pattern. This invention also discloses a method for calculating the dimensions of the valve hall arrangement structure for a marine flexible DC converter station. The valve hall arrangement structure and its dimension calculation method for the marine flexible DC converter station of this invention simplify the wiring, clarify the incoming and outgoing line connections, and eliminate the need for DC pole line confluence through alternating phase switching of high and low busbars. This significantly reduces the length and width dimensions of the valve halls in the marine flexible DC converter station, thereby lowering the project cost.

[0003] Patent CN107919679A discloses a flexible DC converter station layout structure, including a valve hall, a bridge arm unit located within the valve hall, and a flexible DC transformer located outside the valve hall. The bridge arm unit is electrically connected to the flexible DC transformer, and includes a converter valve and a bridge arm reactor. The converter valve is electrically connected to the bridge arm reactor. For ±800kV and above UHV flexible DC transmission processes, this flexible DC converter station layout structure places the bridge arm reactor within the valve hall, eliminating the need for through-wall connection equipment with high insulation requirements and complex manufacturing processes, significantly reducing the construction difficulty and cost of the flexible DC converter station layout structure. Moreover, placing the bridge arm reactor within the valve hall reduces the impact of equipment operating noise on the surrounding environment, improving the environmental friendliness of the flexible DC converter station layout structure.

[0004] However, existing technologies only disclose the layout structure of valve halls in flexible DC converter stations, without addressing the layout of DC transformer valve halls. Therefore, it is necessary to design the layout structure of DC transformer valve halls to solve the problem of their rational arrangement. Summary of the Invention

[0005] The purpose of this invention is to provide a DC transformer valve hall layout structure that is reasonable and compact, has high space utilization, and saves valve hall space.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a DC transformer valve hall arrangement structure, characterized in that it includes a valve hall, in which positive and negative valves of a DC transformer are arranged simultaneously. One side of the valve hall is a low-voltage DC input terminal, and the other side is a high-voltage DC input terminal and a common input terminal. Each input terminal is connected to equipment outside the valve hall through wall-penetrating or floor-penetrating sleeves at different positions in the valve hall.

[0007] Furthermore, the positive valve is provided with two valve units, namely positive valve unit phase A and positive valve unit phase B, and the negative valve is provided with two valve units, namely negative valve unit phase A and negative valve unit phase B; the four valve units have the same structure and are arranged in the order of positive valve unit phase A, positive valve unit phase B, negative valve unit phase A, and negative valve unit phase B.

[0008] Furthermore, the low-pressure end of the valve unit is a two-port valve; the high-pressure end of the valve unit is a one-port valve; and the common end of the valve unit is a one-port valve.

[0009] Furthermore, the low-pressure L1 terminal of phase A of the positive valve unit is connected to the low-pressure L1 terminal equipment of phase A outside the valve hall through the first side wall sleeve, and a first low-pressure device is installed between the low-pressure L1 terminal of phase A of the positive valve unit and the first side wall sleeve; the low-pressure L2 terminal of phase A of the positive valve unit is connected to the low-pressure L2 terminal equipment of phase A outside the valve hall through the first floor sleeve, and a second low-pressure device is installed between the low-pressure L2 terminal of phase A of the positive valve unit and the first floor sleeve.

[0010] Furthermore, the wiring methods for the low-voltage terminals of phase B of the positive valve unit, phase A of the negative valve unit, and phase B of the negative valve unit are the same as those for the low-voltage terminal of phase A of the positive valve unit.

[0011] Furthermore, the high-voltage end of phase A of the positive valve unit is connected to the high-voltage end equipment of phase A outside the valve hall through the second floor slab sleeve, and a high-voltage side device is installed between the high-voltage end of phase A of the positive valve unit and the second floor slab sleeve.

[0012] Furthermore, the wiring methods for the high-voltage terminals of phase B of the positive valve unit, phase A of the negative valve unit, and phase B of the negative valve unit are the same as those for the high-voltage terminal of phase A of the positive valve unit.

[0013] Furthermore, the common terminal of phase A of the positive valve unit is connected to the common terminal equipment of phase A outside the valve hall through the second through-wall sleeve, and a common terminal equipment is installed between the common terminal of phase A of the positive valve unit and the second through-wall sleeve.

[0014] Furthermore, the wiring methods for the common terminal of phase B of the positive valve unit, the common terminal of phase A of the negative valve unit, and the common terminal of phase B of the negative valve unit are the same as those for the common terminal of phase A of the positive valve unit.

[0015] Furthermore, the DC transformer valve hall is configured on an offshore all-DC collection platform to boost the low-voltage DC lines collected by the offshore DC wind turbines before transmitting them to the onshore converter station.

[0016] Compared with existing technologies, the present invention has the following advantages: The present invention adopts a common valve hall arrangement for the positive and negative valves of the DC transformer, and the low-voltage, high-voltage, and common terminal inlets of the DC transformer combine high-voltage and low-voltage inlets. The valve hall space is arranged reasonably, compactly, and ingeniously, with high space utilization and saving valve hall space. Therefore, the present invention has strong practicality and broad application prospects. Attached Figure Description

[0017] Figure 1 This is a plan view of the DC transformer valve hall layout structure according to an embodiment of the present invention; Figure 2 This is a cross-sectional view of the DC transformer valve hall layout structure according to an embodiment of the present invention. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0020] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0021] like Figure 1-2 As shown, this embodiment provides a DC transformer valve hall arrangement structure, including a valve hall 1. The positive and negative valves 2 and 3 of the DC transformer are simultaneously arranged within the valve hall 1, meaning that both the positive valve 2 and the negative valve 3 are located within one valve hall 1. One side of the valve hall is the low-voltage DC input terminal, and the other side is the high-voltage DC input terminal and a common input terminal. Each input terminal is connected to external equipment through wall or floor bushings at different locations within the valve hall.

[0022] The positive valve has two valve units, namely positive valve unit A phase 2.1 and positive valve unit B phase 2.2, and the negative valve has two valve units, namely negative valve unit A phase 3.1 and negative valve unit B phase 3.2. The four valve units 2.1, 2.2, 3.1 and 3.2 have the same structure and are arranged in the following order: positive valve unit A phase 2.1, positive valve unit B phase 2.2, negative valve unit A phase 3.1 and negative valve unit B phase 3.2.

[0023] The low-pressure end of the valve unit is dual-port. The low-pressure L1 end of phase A of the positive valve unit is connected to the low-pressure L1 end device of phase A outside the valve hall through the first side wall sleeve 4.1, and a first low-pressure device 6.1 is installed between the low-pressure L1 end of phase A of the positive valve unit and the first side wall sleeve 4.1; the low-pressure L2 end of phase A of the positive valve unit is connected to the low-pressure L2 end device of phase A outside the valve hall through the first floor sleeve 4.3, and a second low-pressure device 6.3 is installed between the low-pressure L2 end of phase A of the positive valve unit and the first floor sleeve 4.3.

[0024] The wiring methods for the low-voltage terminals of phase B of the positive valve unit, phase A of the negative valve unit, and phase B of the negative valve unit are the same as those for the low-voltage terminal of phase A of the positive valve unit.

[0025] The high-pressure end of the valve unit is a single port. The high-pressure end of phase A of the positive valve unit is connected to the high-pressure end equipment of phase A outside the valve hall through the second floor penetration sleeve 4.7. A high-pressure side device 6.7 is installed between the high-pressure end of phase A of the positive valve unit and the second floor penetration sleeve 4.7.

[0026] The wiring methods for the high-voltage terminals of phase B of the positive valve unit, phase A of the negative valve unit, and phase B of the negative valve unit are the same as those for the high-voltage terminal of phase A of the positive valve unit.

[0027] The common terminal of the valve unit is a single port. The common terminal of phase A of the positive valve unit is connected to the common terminal equipment of phase A outside the valve hall through the second through-wall sleeve 4.5. A common terminal equipment 6.5 is installed between the common terminal of phase A of the positive valve unit and the second through-wall sleeve 4.5.

[0028] The wiring method for the common terminal of phase B of the positive valve unit, the common terminal of phase A of the negative valve unit, and the common terminal of phase B of the negative valve unit is the same as the wiring method for the common terminal of phase A of the positive valve unit.

[0029] The DC transformer valve hall is located on an offshore all-DC collection platform and is used to boost the voltage of the low-voltage DC lines collected by the offshore DC wind turbines before transmitting them to the onshore converter station.

[0030] This invention provides a valve hall arrangement structure for a DC transformer, which adopts a common valve hall arrangement for the positive and negative valves of the DC transformer. The two ports on the low-voltage side of the DC transformer are arranged with high-inlet and low-inlet respectively, and the high-voltage side and the common terminal port of the DC transformer are arranged with high-inlet and low-inlet respectively. This makes the entire valve hall space arrangement reasonable and compact, improves space utilization, and saves valve hall space.

[0031] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A valve hall arrangement structure for a DC transformer, characterized in that, The valve hall includes a DC transformer positive and negative valves. One side of the valve hall is a low-voltage DC input terminal, and the other side is a high-voltage DC input terminal and a common input terminal. Each input terminal is connected to the equipment outside the valve hall through wall or floor sleeves at different locations in the valve hall. The positive valve has two valve units, namely positive valve unit phase A and positive valve unit phase B, and the negative valve has two valve units, namely negative valve unit phase A and negative valve unit phase B. The four valve units have the same structure and are arranged in the order of positive valve unit phase A, positive valve unit phase B, negative valve unit phase A, and negative valve unit phase B. The low-pressure end of the valve unit is a two-port valve; the high-pressure end of the valve unit is a one-port valve; the common end of the valve unit is a one-port valve. The low-pressure L1 end of phase A of the positive valve unit is connected to the low-pressure L1 end equipment of phase A outside the valve hall through the first side wall sleeve (4.1). A first low-pressure device (6.1) is installed between the low-pressure L1 end of phase A of the positive valve unit and the first side wall sleeve (4.1). The low-pressure L2 end of phase A of the positive valve unit is connected to the low-pressure L2 end equipment of phase A outside the valve hall through the first floor sleeve (4.3). A second low-pressure device (6.3) is installed between the low-pressure L2 end of phase A of the positive valve unit and the first floor sleeve (4.3).

2. The DC transformer valve hall arrangement structure according to claim 1, characterized in that, The wiring methods for the low-voltage terminals of phase B of the positive valve unit, phase A of the negative valve unit, and phase B of the negative valve unit are the same as those for the low-voltage terminal of phase A of the positive valve unit.

3. The DC transformer valve hall arrangement structure according to claim 1, characterized in that, The high-voltage end of phase A of the positive valve unit is connected to the high-voltage end equipment of phase A outside the valve hall through the second floor slab sleeve (4.7). A high-voltage side equipment (6.7) is installed between the high-voltage end of phase A of the positive valve unit and the second floor slab sleeve (4.7).

4. The DC transformer valve hall arrangement structure according to claim 3, characterized in that, The wiring methods for the high-voltage terminals of phase B of the positive valve unit, phase A of the negative valve unit, and phase B of the negative valve unit are the same as those for the high-voltage terminal of phase A of the positive valve unit.

5. The DC transformer valve hall arrangement structure according to claim 1, characterized in that, The common terminal of phase A of the positive valve unit is connected to the common terminal equipment of phase A outside the valve hall through the second through-wall sleeve (4.5). A common terminal equipment (6.5) is set between the common terminal of phase A of the positive valve unit and the second through-wall sleeve (4.5).

6. The DC transformer valve hall arrangement structure according to claim 5, characterized in that, The wiring method for the common terminal of phase B of the positive valve unit, the common terminal of phase A of the negative valve unit, and the common terminal of phase B of the negative valve unit is the same as the wiring method for the common terminal of phase A of the positive valve unit.

7. The DC transformer valve hall arrangement structure according to claim 1, characterized in that, The DC transformer valve hall is configured on an offshore all-DC collection platform to boost the voltage of the low-voltage DC lines collected by the offshore DC wind turbines before transmitting them to the onshore converter station.

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