Semi-centralized direct current energy consumption device power module structure

Abstract

A power module structure of a semi-centralized direct-current energy consumption device comprises a module frame, an IGCT press-fitting valve string, a direct-current capacitor, a direct-current capacitor connecting copper bar and a module incoming and outgoing line copper bar. Wherein the IGCT press-fitting valve string and the direct-current capacitor are arranged in the module frame and are connected through the direct-current capacitor connecting copper bar; one end of the direct-current capacitor connecting copper bar is fixedly mounted on a side binding post, facing the IGCT press-fitting valve string, of the direct-current capacitor, and the other end of the direct-current capacitor connecting copper bar is connected with the IGCT press-fitting valve string; one end of the module incoming and outgoing line copper bar is connected with the IGCT press-fitting valve string, and the other end is fixedly installed on the module frame. The device is compact in structural design, free of waterway design, capable of avoiding the risk of water leakage and high in reliability. Meanwhile, the power source, the controller and the bypass switch are located on the front side, and debugging, independent maintenance and other operations on the energy consumption valve tower are facilitated. All valve assemblies, electrical elements and structural assemblies are reasonably arranged in one module, each module can complete overall rapid replacement, and the operation and maintenance workload and operation and maintenance difficulty of the energy-consuming valve are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of offshore wind power direct current transmission, and in particular relates to a power module structure of a semi-centralized direct current energy consumption device. Background Art

[0002] When an offshore wind farm is connected using flexible direct current (HVDC) transmission, if a fault occurs in the receiving AC grid, the power output capacity of the receiving converter station decreases, while power transmission on the wind farm side remains largely unaffected. This creates an imbalance in active power between the sending and receiving ends. In severe cases, this can cause the DC line voltage to overshoot, tripping the DC line. DC energy dissipation devices are crucial for ensuring the flexible DC system can safely survive certain disturbances and maintain long-term reliable operation. Current DC energy dissipation solutions suffer from complex water cooling systems, a high failure rate, and poor module layout, resulting in low space utilization. Utility Model Content

[0003] In order to solve the deficiencies in the prior art, the utility model provides a power module structure of an energy consuming device having the advantages of high structural level, strong reliability, and easy installation.

[0004] The utility model adopts the following technical solutions.

[0005] The utility model provides a power module structure of a semi-centralized DC energy consumption device, comprising:

[0006] Module frame, IGCT press-fit valve string, DC capacitor, DC capacitor connecting copper busbar and module inlet and outlet copper busbar;

[0007] Among them, the IGCT press-fit valve string and DC capacitor are arranged inside the module frame, and the two are connected through the DC capacitor connecting copper busbar; one end of the DC capacitor connecting copper busbar is fixedly installed on the side terminal of the DC capacitor facing the IGCT press-fit valve string, and the other end is connected to the IGCT press-fit valve string; one end of the module inlet and outlet copper busbar is connected to the IGCT press-fit valve string, and the other end is fixedly installed on the module frame.

[0008] Preferably, the module frame includes a base frame and a fixed upper frame of the module, and the fixed upper frame of the module is fixedly arranged above the base frame.

[0009] Preferably, the chassis includes a bottom beam, and a cross beam, a capacitor support beam, an IGCT press-fit valve string support member and a resistor support member respectively fixedly connected to the bottom beam.

[0010] Preferably, the bottom beam is arranged along the length direction; the cross beam is perpendicular to the bottom beam and arranged along the width direction; the capacitor support beam is parallel to the cross beam direction and is fixedly connected to the bottom beam; the IGCT press-fit valve string support is fixedly arranged on the upper part of the bottom beam, perpendicular to the plane where the bottom beam and the cross beam are located.

[0011] Preferably, the chassis further comprises bearing rollers, and three bearing rollers are respectively installed at the bottom of each bottom beam.

[0012] Preferably, the number of the bottom beam, the number of the cross beam and the number of the capacitor support beam are two respectively.

[0013] Preferably, the fixed upper frame of the module includes vertical beams, and a top frame and a frame support plate fixedly connected to the vertical beams, wherein the installation directions of the top frame and the frame support plate are parallel.

[0014] Preferably, the top frame is a welded rectangular structure; the number of vertical beams is six, and three vertical beams are fixedly arranged on each bottom beam.

[0015] Preferably, the IGCT press-fit valve string includes an IGCT device, a diode, a heat sink, an insulating member and a buffer circuit;

[0016] The IGCT device, diode, heat sink and insulation are crimped connection structures; the heat sink is connected to the module input and output copper busbars; one end of the buffer loop is fixedly set on the heat sink, and the other end is connected to the DC capacitor through the DC capacitor connection copper busbar.

[0017] Preferably, it also includes a bypass switch, a controller and a power supply;

[0018] The bypass switch, controller and power supply are assembled on the module frame in sequence from bottom to top.

[0019] The beneficial effects of the present invention are as follows:

[0020] This new model features a compact design and no waterways, eliminating the risk of leaks and ensuring high reliability. The power supply, controller, and bypass switch are located on the front of the module, facilitating commissioning and individual maintenance on the energy-consuming valve tower. All valve components, electrical elements, and structural assemblies are strategically arranged within a single module. Each module functions as a single unit, allowing for rapid replacement of the entire module, reducing the workload and difficulty of energy-consuming valve maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a side view of the power module structure of the energy consumption device;

[0022] Figure 2 This is a front view of the power module structure of the energy consumption device;

[0023] Figure 3 It is a three-dimensional diagram of the module framework;

[0024] Figure 4 This is a side view of the IGCT press-fit valve string structure.

[0025] In the accompanying drawings, the component names corresponding to the reference numbers are:

[0026] 1-module frame, 2-IGCT press-fit valve string, 3-DC capacitor, 4-DC capacitor connection copper busbar, 5-module input and output copper busbar, 6-bypass switch, 7-controller, 8-power supply;

[0027] 11- chassis, 12- module fixed upper frame, 21- IGCT device, 22- diode, 23- heat sink, 24- insulation component, 25- buffer circuit;

[0028] 111- bottom beam, 112- cross beam, 113- capacitor support beam, 114- IGCT press-fit valve string support, 115- resistor support; 121- vertical beam, 122- top frame, 123- frame support plate. DETAILED DESCRIPTION

[0029] To make the purpose, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. The embodiments described in this application are only some embodiments of the present invention, not all embodiments. Based on the spirit of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0031] In the description of the embodiments of the present invention, it should be noted that if the terms "left", "right", "front", "back", "up", "down", "horizontal", "inside", "outside" and the like indicate an orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance.

[0032] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0033] like Figure 1 This is the front view of the power module of the energy consumption device. Figure 2 This is a side view of the power module of the energy consumption device. As shown in the figure, an embodiment of the present invention provides a semi-centralized DC energy consumption device power module structure, including: a module frame 1, an IGCT (Intergrated Gate Commutated Thyristors) press-fit valve string 2, a DC capacitor 3, a DC capacitor connecting copper busbar 4, a module input and output copper busbar 5, a bypass switch 6, a controller 7 and a power supply 8. Among them, the IGCT press-fit valve string 2 and the DC capacitor 3 are arranged inside the module frame 1, and one end of the DC capacitor connecting copper busbar 4 is fixedly mounted on the side terminal of the DC capacitor 3 facing the IGCT press-fit valve string 2, and the other end of the DC capacitor connecting copper busbar 4 is connected to the IGCT press-fit valve string 2. One end of the module input and output copper busbar 5 is connected to the IGCT press-fit valve string 2, and the other end is fixed to the module frame 1, making the structure more compact and reasonable, and convenient for connecting to the lower-level module. The bypass switch 6, controller 7 and power supply 8 are assembled in sequence from bottom to top at the front end of the module frame 1.

[0034] Figure 3 The figure is a three-dimensional diagram of the module frame. As shown in the figure, the module frame 1 includes a base frame 11 and a fixed upper frame 12 of the module. The fixed upper frame 12 of the module is fixedly arranged above the base frame 11. The base frame 11 includes a bottom beam 111, a cross beam 112 vertically fixedly connected to the bottom beam 111, a capacitor support beam 113 and a bearing roller. The base frame 11 includes two bottom beams 111 along the length direction, two cross beams 112 perpendicular to the bottom beam 111 along the width direction, two capacitor support beams 113 between the two bottom beams, an IGCT press-fit valve string support 114 and a resistor support 115. The capacitor support beam 113 is parallel to the cross beam 112. In addition, three bearing rollers (not shown in the figure) are installed at the bottom of each bottom beam 111. The IGCT press-fit valve string 2 , the buffer circuit 25 , and the DC capacitor 3 are sequentially assembled from front to back on the capacitor support beam 113 , the IGCT press-fit valve string support 114 , and the resistor support 115 of the base frame 11 of the module frame 1 .

[0035] The fixed upper frame 12 of the module includes vertical beams 121, and a top frame 122 and a frame support plate 123 that are vertically fixedly connected to the vertical beams 121. The installation directions of the top frame 122 and the frame support plate 123 are parallel. The top frame 122 is a welded rectangular structure. Six vertical beams 121 are fixedly connected to the bottom beam 111. Three vertical beams 121 are fixedly set on each bottom beam 111. The six vertical beams 121 are distributed in the front and back of the fixed upper frame 12 of the module to support the top frame 122 and the frame support plate 123. The capacitor support beam 113 is located at the other end of the length direction of the bottom frame 11. A lifting ring is fixedly set on the upper part of the top frame 122 to facilitate the lifting and movement of the equipment, which is conducive to the installation and replacement of the entire module.

[0036] Figure 4 This is a side view of an IGCT press-fit valve train. As shown, the IGCT press-fit valve train 2 includes an IGCT device 21, a diode 22, a heat sink 23, an insulator 24, and a buffer circuit 25. The IGCT device 21 is an integrated structure of the IGCT and the driver assembly.

[0037] The IGCT device 21, diode 22, heat sink 23, and insulator 24 are press-assembled using a press machine, forming a press-fit structure. The heat sink 23 connects the IGCT device 21 and diode 22, dissipating heat from the power electronics while also replacing the copper busbar for conducting electrical current. One end of the buffer circuit 25 is fixed to the heat sink 23 of the IGCT press-fit valve train 2, and the other end is connected to the DC capacitor 3 assembly via the DC capacitor connection copper busbar 4. The heat sink 23 is connected to the module's inlet and outlet copper busbars 5.

[0038] The beneficial effects of the embodiment of the utility model are:

[0039] This new model features a compact design and no waterways, eliminating the risk of leaks and ensuring high reliability. The power supply, controller, and bypass switch are located on the front of the module, facilitating commissioning and individual maintenance on the energy-consuming valve tower. All valve components, electrical elements, and structural assemblies are strategically arranged within a single module. Each module functions as a single unit, allowing for rapid replacement of the entire module, reducing the workload and difficulty of energy-consuming valve maintenance.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A power module structure of a semi-centralized DC energy consumption device, characterized in that: include: Module frame (1), IGCT press-fit valve string (2), DC capacitor (3), DC capacitor connecting copper busbar (4) and module inlet and outlet copper busbar (5); The IGCT press-fit valve string (2) and the DC capacitor (3) are arranged inside the module frame (1), and the two are connected via a DC capacitor connecting copper bar (4); one end of the DC capacitor connecting copper bar (4) is fixedly mounted on a side terminal of the DC capacitor (3) facing the IGCT press-fit valve string (2), and the other end is connected to the IGCT press-fit valve string (2); one end of the module inlet and outlet copper bar (5) is connected to the IGCT press-fit valve string (2), and the other end is fixedly mounted on the module frame (1).

2. The power module structure of the semi-centralized DC energy consumption device according to claim 1, characterized in that: The module frame (1) comprises a base frame (11) and a fixed upper frame (12) of the module, wherein the fixed upper frame (12) of the module is fixedly arranged above the base frame (11).

3. The power module structure of the semi-centralized DC energy consumption device according to claim 2, characterized in that: The base frame (11) comprises a bottom beam (111), a cross beam (112), a capacitor support beam (113), an IGCT press-fit valve string support member (114), and a resistor support member (115) respectively fixedly connected to the bottom beam (111).

4. The power module structure of the semi-centralized DC energy consumption device according to claim 3, characterized in that: The bottom beam (111) is arranged along the length direction; the cross beam (112) is perpendicular to the bottom beam (111) and arranged along the width direction; the capacitor support beam (113) is parallel to the cross beam (112) and fixedly connected to the bottom beam (111); the IGCT press-fit valve string support member (114) is fixedly arranged on the upper part of the bottom beam (111) and is perpendicular to the plane where the bottom beam (111) and the cross beam (112) are located.

5. The power module structure of the semi-centralized DC energy consumption device according to claim 3, characterized in that: The base frame (11) further comprises bearing rollers, and three bearing rollers are respectively installed at the bottom of each bottom beam (111).

6. The power module structure of the semi-centralized DC energy consumption device according to claim 3, characterized in that: The number of the bottom beam (111), the cross beam (112) and the capacitor support beam (113) is two respectively.

7. The power module structure of the semi-centralized DC energy consumption device according to claim 3, characterized in that: The fixed upper frame (12) of the module comprises a vertical beam (121), and a top frame (122) and a frame support plate (123) fixedly connected to the vertical beam (121), wherein the installation directions of the top frame (122) and the frame support plate (123) are parallel.

8. The power module structure of the semi-centralized DC energy consumption device according to claim 7, characterized in that: The top frame (122) is a welded rectangular structure; the number of vertical beams (121) is six, and three vertical beams (121) are fixedly arranged on each bottom beam (111).

9. The power module structure of the semi-centralized DC energy consumption device according to claim 1, characterized in that: The IGCT press-fit valve string (2) includes an IGCT device (21), a diode (22), a radiator (23), an insulating member (24) and a buffer circuit (25); The IGCT device (21), the diode (22), the heat sink (23) and the insulating member (24) are in a press-fit connection structure; the heat sink (23) is connected to the module inlet and outlet copper busbar (5); one end of the buffer circuit (25) is fixedly arranged on the heat sink (23), and the other end is connected to the DC capacitor (3) via the DC capacitor connection copper busbar (4).

10. The power module structure of the semi-centralized DC energy consumption device according to claim 1, characterized in that: Also includes a bypass switch (6), a controller (7) and a power supply (8); The bypass switch (6), the controller (7) and the power supply (8) are sequentially assembled on the module frame (1) from bottom to top.

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