A high-altitude off-site valve tower arrangement for a marine converter station

Abstract

The utility model relates to a kind of offshore converter station height ectopic valve tower arrangement structure, belong to the main electrical equipment arrangement technical field on the upper platform of offshore converter station, including valve hall, the bridge wall electric reactor room and connection variable room are set to the top of valve hall, cable layer is also set between connection variable room and valve hall, the bottom plate of cable layer and bridge wall electric reactor room is ladder staggered structure.This utility model designs the bottom plate of cable layer and bridge wall electric reactor room as ladder staggered structure, effectively improves space utilization.In addition, this unique arrangement not only reduces overall height, reduces steel consumption, but also makes gravity drop, thereby enhances the overall stability of the upper platform of offshore converter station, provides more reliable technical support for offshore power transmission.

Description

Technical Field

[0001] This utility model relates to a height-displacement valve tower arrangement structure for an offshore converter station, belonging to the technical field of main electrical equipment arrangement on the upper platform of an offshore converter station. Background Technology

[0002] Offshore converter stations, as the core hub of deep-sea wind power flexible DC transmission systems, typically adopt a multi-layer outfitting fixed platform structure. Limited by factors such as offshore construction window, floating crane capacity, and transport draft, the platform's "total height, center of gravity, and steel consumption" become the three major hard constraints on the overall layout. Among these, the height of the converter valve tower (an insulated gate bipolar transistor module stack) has the most significant impact on the platform's layer height; therefore, the valve tower arrangement becomes a key technology for controlling the platform's dimensions.

[0003] In traditional offshore converter station valve tower arrangements, valve towers generally adopt an equal-height layout, meaning that the number of stacked layers of insulated gate bipolar transistor modules within each valve tower is the same, resulting in a uniform overall height of the valve towers. In multi-layer outfitting fixed platform structures, this arrangement can easily lead to excessively high local heights, thereby increasing the platform's overall height, center of gravity, and steel consumption. Faced with challenges such as tight construction windows, limited floating crane capacity, and stringent transport draft requirements, the traditional equal-height layout method cannot meet the overall structural constraints of the platform's "total height, center of gravity, and steel consumption." Utility Model Content

[0004] To overcome the shortcomings of existing layout structures and methods, such as excessive platform height and excessive steel consumption, this utility model designs a height-displacement valve tower layout structure and method for offshore converter stations. This design makes efficient use of space, significantly reduces the overall height, and simultaneously reduces the amount of steel used.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A high-displacement valve tower arrangement structure for an offshore converter station includes a valve hall, at the top of which a bridge wall reactor chamber and a connecting transformer chamber are provided. A cable layer is also provided between the connecting transformer chamber and the valve hall. The cable layer and the bottom plate of the bridge wall reactor chamber are arranged in a stepped staggered structure.

[0006] In a preferred embodiment of the present invention, two valve towers are provided in the valve hall. The two valve towers include a first valve tower located directly below the bridge wall reactor chamber and a second valve tower located directly below the connecting transformer chamber. The first valve tower and the second valve tower are electrically connected.

[0007] In a preferred embodiment of the present invention, the valve tower includes an insulated gate bipolar transistor (IGBT), which is stacked on top of the valve tower via an insulating support structure. The number of IGBTs disposed on the first valve tower is less than the number disposed on the second valve tower.

[0008] In a preferred embodiment of the present invention, a transverse cable tray is provided inside the cable layer, and cables are laid on the transverse cable tray. The extended ends of the cables are provided with flat cables and heat dissipation fins.

[0009] This application also provides a method for arranging height-displacement valve towers in offshore converter stations, including the following steps: S1. Determine the installation positions of two valve towers in the valve hall of the offshore converter station, namely the first valve tower installation position located directly below the bridge wall reactor chamber and the second valve tower installation position located directly below the connecting transformer chamber. S2. Install the first valve tower at the first valve tower mounting position. During the installation process, reduce the number of insulated gate bipolar transistors inside the first valve tower to reduce its overall height. Install the second valve tower at the second valve tower mounting position. During the installation process, increase the number of insulated gate bipolar transistors inside the second valve tower to increase its overall height. S3. According to the clearance requirements of electrical equipment, raise the floor above the second valve tower corresponding to the top of the valve hall, and lower the floor above the first valve tower. S4. Reduce the total platform height of the bridge wall reactor chamber and simultaneously lower the overall elevation of the connecting transformer chamber so that the top surface of the connecting transformer chamber is flush with the top surface of the bridge wall reactor chamber, thereby compressing the cable layer height between the connecting transformer chamber and the valve hall and reducing the total platform height.

[0010] Compared with the prior art, this utility model has the following features and beneficial effects: This invention employs a height-displacement valve tower arrangement structure and method. By reducing the number of layers of insulated gate bipolar transistors (IGBTs) inside the first valve tower and increasing the number of layers inside the second valve tower, combined with staggered arrangement of the valve hall ceiling slabs, overall reduction of the elevation of the connecting transformer room, and compression of the cable layer height, the overall height of the platform is significantly reduced, and the amount of steel used is reduced simultaneously. This not only effectively addresses challenges such as tight construction time windows, limited floating crane capacity, and stringent transport draft requirements, but also significantly improves space utilization. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] The attached diagrams are labeled as follows: 1. Valve hall; 2. Bridge wall reactor room; 3. Connecting transformer room; 4. Valve tower; 5. Cable layer; 41. First valve tower; 42. Second valve tower; 43. Insulated gate bipolar transistor; 51. Cable tray. Detailed Implementation

[0013] The present invention will now be described in more detail with reference to the embodiments.

[0014] like Figure 1 As shown, the offshore converter station height-displacement valve tower arrangement structure of this embodiment includes a valve hall 1. The top of the valve hall 1 is provided with a bridge wall reactor chamber 2 and a connecting transformer chamber 3. A cable layer 5 is also provided between the connecting transformer chamber 3 and the valve hall 1. The cable layer 5 and the bottom plate of the bridge wall reactor chamber 2 are arranged in a stepped staggered structure.

[0015] like Figure 1 As shown, two valve towers 4 are provided in the valve hall 1. The two valve towers 4 include a first valve tower 41 located directly below the bridge wall reactor chamber 2 and a second valve tower 42 located directly below the connecting transformer chamber 3. The first valve tower 41 and the second valve tower 42 are electrically connected.

[0016] like Figure 1 As shown, the valve tower 4 includes an insulated gate bipolar transistor 43, which is stacked on top of the valve tower 4 through an insulating support structure. The number of insulated gate bipolar transistors 43 disposed on the first valve tower 41 is less than the number disposed on the second valve tower 42.

[0017] like Figure 1 As shown, a horizontal cable tray 51 is provided inside the cable layer 5, and cables are laid on the horizontal cable tray 51. The cable extension ends are provided with flat cables and heat dissipation fins.

[0018] like Figure 1 As shown, a method for arranging height-displacement valve towers in an offshore converter station includes the following steps: S1. Determine the installation positions of two valve towers 4 in the valve hall 1 of the offshore converter station, namely the first valve tower 41 installation position located directly below the bridge wall reactor chamber 2 and the second valve tower 42 installation position located directly below the connecting transformer chamber 3. S2. Install the first valve tower 41 at the first valve tower 41 mounting position. During the installation process, reduce the number of insulated gate bipolar transistors 43 inside the first valve tower 41 to reduce its overall height. Install the second valve tower 42 at the second valve tower 42 mounting position. During the installation process, increase the number of insulated gate bipolar transistors 43 inside the second valve tower 42 to increase its overall height. S3. According to the clearance requirements of electrical equipment, the floor above the valve hall 1 corresponding to the second valve tower 42 is raised, and the floor above the first valve tower 41 is lowered. S4. Reduce the total platform height of the bridge wall reactor chamber 2, and at the same time reduce the overall elevation of the connecting transformer chamber 3 so that the top surface of the connecting transformer chamber 3 is flush with the top surface of the bridge wall reactor chamber 2, thereby compressing the height of the cable layer 5 between the connecting transformer chamber 3 and the valve hall 1, and thus reducing the total platform height.

[0019] The working principle of this invention is as follows: By differentially arranging the number of insulated gate bipolar transistors 43 inside the valve tower 4, a significant height difference is created between the first valve tower 41 and the second valve tower 42. This height difference, in conjunction with the staggered floor structure on the top surface of the valve hall 1, satisfies the insulation distance requirements of electrical equipment while decomposing the platform space, which originally required a uniform height, into a three-dimensional layout. Specifically, reducing the platform height of the bridge wall reactor chamber 2 and compressing the space of the cable layer 5 create a synergistic effect, ensuring that the top surfaces of the connecting transformer chamber 3 and the bridge wall reactor chamber 2 are flush. This three-dimensional arrangement not only reduces the total platform height compared to the traditional uniform height arrangement, reducing steel consumption, but also, the flattened design of the cable layer 5, combined with heat dissipation fins, increases the current carrying capacity, effectively solving the dual requirements of space constraints and performance improvement for converter stations in deep-sea wind power transmission systems.

[0020] In the description of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A height-displacement valve tower arrangement structure for an offshore converter station, characterized in that: It includes a valve hall (1), and a bridge wall reactor chamber (2) and a connecting transformer chamber (3) are provided at the top of the valve hall (1). A cable layer (5) is also provided between the connecting transformer chamber (3) and the valve hall (1). The cable layer (5) and the bottom plate of the bridge wall reactor chamber (2) are in a stepped staggered structure.

2. The arrangement structure of a high-position valve tower for an offshore converter station according to claim 1, characterized in that: The valve hall (1) is provided with two valve towers (4). The two valve towers (4) include a first valve tower (41) located directly below the bridge wall reactor chamber (2) and a second valve tower (42) located directly below the connecting transformer chamber (3). The first valve tower (41) and the second valve tower (42) are electrically connected.

3. The arrangement structure of a high-position valve tower for an offshore converter station according to claim 2, characterized in that: The valve tower (4) includes an insulated gate bipolar transistor (43), which is stacked on top of the valve tower (4) through an insulating support structure. The number of insulated gate bipolar transistors (43) disposed on the first valve tower (41) is less than the number disposed on the second valve tower (42).

4. The arrangement structure of a high-position valve tower for an offshore converter station according to claim 1, characterized in that: The cable layer (5) is provided with a horizontal cable tray (51), on which cables are laid, and the cable extension ends are provided with flat cables and heat dissipation fins.

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