Valve tower of ultrahigh-pressure direct-current energy consumption device

Abstract

The utility model discloses a valve tower of an ultrahigh-voltage direct-current energy consumption device, and relates to the technical field of flexible direct-current power transmission engineering. Comprising a positive energy-consuming valve tower, a negative energy-consuming valve tower and a connecting pipe bus connected between the positive energy-consuming valve tower and the negative energy-consuming valve tower, the positive energy-consuming valve tower and the negative energy-consuming valve tower are symmetrically arranged in a linear manner, so that the occupied area of the direct-current field energy-consuming valve tower is reduced; each of the positive energy-consuming valve tower and the negative energy-consuming valve tower comprises an insulating support structure and a multi-layer valve switch structure; a plurality of valve layers are arranged among the multi-layer valve switch structures; the valve layer is composed of a plurality of valve sections which are bilaterally symmetrical, the left valve section and the right valve section are arranged back to back, and each layer of valve tower is in a U-shaped wiring mode, so that the types and the number of connecting pipe busbars or busbars are effectively reduced, and the structure is simpler.

Description

Technical Field

[0001] The utility model relates to the technical field of flexible direct current (DC) power transmission engineering, in particular to a valve tower of an ultra-high voltage DC energy dissipation device. Background Art

[0002] Flexible DC transmission technology has become one of the best solutions for large-scale offshore wind power transmission and grid connection. DC energy dissipation devices are crucial for offshore wind power flexible DC systems to withstand AC grid faults at the receiving end. They effectively address the problem of excess power from wind farms continuously accumulating in the DC system, generating overvoltage and potentially endangering system operation.

[0003] Currently, there are no engineering precedents for DC energy-consuming devices at the ultra-high voltage level at home and abroad. In addition, due to the limited installation space and complex electrical connections, the overall layout of optical fibers and daily inspection and maintenance of the valve tower are very challenging. Utility Model Content

[0004] In order to solve the deficiencies in the prior art, the utility model provides a valve tower arrangement for an ultra-high voltage direct current energy dissipation device which has simple electrical connections, high structural strength, and is conducive to the arrangement of optical fibers.

[0005] The utility model adopts the following technical solutions:

[0006] A valve tower for an ultra-high voltage direct current (EHVDC) energy dissipation device comprises: a positive electrode energy dissipation valve tower, a negative electrode energy dissipation valve tower, and a connecting pipe mother connecting the positive electrode energy dissipation valve tower and the negative electrode energy dissipation valve tower; the positive electrode energy dissipation valve tower and the negative electrode energy dissipation valve tower are arranged symmetrically in the shape of a line; the positive electrode energy dissipation valve tower and the negative electrode energy dissipation valve tower comprise: an insulating support structure and a multi-layer valve switch structure; a plurality of valve layers are provided between the multi-layer valve switch structures; the valve layers comprise a plurality of valve sections that are bilaterally symmetrical, the left and right valve sections being arranged back to back, and each layer of the valve tower is connected in a U-shape.

[0007] According to the valve tower of an ultra-high voltage direct current energy consumption device described in the right, the positive energy consumption valve tower and the negative energy consumption valve tower both adopt a "top-in and bottom-out" wiring form, and the connecting pipe mother is horizontally installed to connect the "bottom-out" wiring terminals of the positive energy consumption valve tower and the negative energy consumption valve tower.

[0008] According to the valve tower of the ultra-high voltage direct current energy dissipation device, the positive electrode energy dissipation valve tower and the negative electrode energy dissipation valve tower are designed as mirror-image structures.

[0009] According to the valve tower of the ultra-high voltage direct current energy dissipation device, the insulating support structure is arranged at the bottom of the valve tower, and the insulating support structure includes: post insulators and oblique insulators; the post insulators and oblique insulators are connected by hinges.

[0010] According to the valve tower of the ultra-high voltage direct current energy dissipation device, the multi-layer valve switch structure further includes interlayer support insulators and metal structural parts.

[0011] According to the valve tower of the ultra-high voltage direct current energy consumption device, the valve section includes: a valve section support structure and a plurality of power modules.

[0012] According to the valve tower of the ultra-high voltage direct current energy dissipation device, the metal beam and the plurality of insulating beams are combined into a valve section support structure by bolt connection, and a slide rail cooperating with the power module hub is provided on the insulating beam.

[0013] According to the valve tower of the ultra-high voltage direct current energy consumption device, all power modules in the positive electrode energy consumption valve tower and the negative electrode energy consumption valve tower adopt a series structure.

[0014] According to the valve tower of the ultra-high voltage direct current energy dissipation device, an optical fiber groove is fixed on the insulating beam, and an optical fiber providing communication for the power module is laid in the optical fiber groove.

[0015] According to the valve tower of the ultra-high voltage direct current energy consumption device, a valve layer maintenance platform is provided in the middle of the valve layer.

[0016] The beneficial effect of the present invention is that, compared with the prior art,

[0017] 1) The ultra-high voltage DC energy-consuming valve tower of the present invention adopts a "one" symmetrical layout, which reduces the footprint of the DC field energy-consuming valve tower;

[0018] 2) The insulation support structure of the energy dissipation valve tower, which is composed of hinged support insulators and inclined insulators, improves the stability of the support structure;

[0019] 3) The U-shaped connection valve layer effectively reduces the types and number of connecting pipe mothers or busbars, making the structure simpler and reducing the manufacturing cost of the energy consumption device;

[0020] 4) The valve section structure that can be hoisted as a whole shortens the valve tower construction time;

[0021] 5) The maintenance platform and pull-out module design between valve layers effectively reduce operation time while ensuring the safety of installation and maintenance personnel;

[0022] 6) The arrangement of the ultra-high voltage direct current energy-consuming valve tower of the present application can increase the power density of the energy-consuming valve hall. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the overall schematic diagram of the valve tower of the ultra-high voltage direct current energy dissipation device;

[0024] Figure 2This is a structural diagram of the positive electrode energy-consuming valve tower of the ultra-high voltage direct current energy-consuming device;

[0025] Figure numerals: 1. Positive electrode energy-consuming valve tower, 2. Negative electrode energy-consuming valve tower, 3. Connecting pipe mother, 4. Insulation support structure, 5. Multi-layer valve switch. DETAILED DESCRIPTION

[0026] To make the purpose, technical solution, and advantages of the present invention more clear, the technical solution 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 part of the embodiments of the present invention, not all of them. Based on the spirit of the present invention, other embodiments obtained by ordinary technicians in this field without making any creative efforts are all within the scope of protection of the present invention.

[0027] like Figure 1 or Figure 2 As shown, an embodiment of the present invention provides a valve tower for an ultra-high voltage direct current (UHVDC) energy dissipation device, comprising: a positive energy dissipation valve tower 1, a negative energy dissipation valve tower 2, and a connecting pipe bus 3 connecting the positive energy dissipation valve tower 1 and the negative energy dissipation valve tower 2. The positive energy dissipation valve tower 1 and the negative energy dissipation valve tower 2 are arranged symmetrically in a straight line, thereby reducing the footprint of the DC field energy dissipation valve tower. The positive energy dissipation valve tower 1 and the negative energy dissipation valve tower 2 are designed as mirror images, including an insulating support structure 4 and a multi-layer valve switch structure 5. The valve layers are designed as multiple valve sections arranged symmetrically on both sides, with the left and right valve sections arranged back-to-back. Each valve tower layer is connected in a U-shaped manner, which effectively reduces the number and type of connecting pipe busbars or busbars, simplifies the structure, and reduces the manufacturing cost of the energy dissipation device.

[0028] The positive electrode energy consumption valve tower 1 and the negative electrode energy consumption valve tower 2 both adopt the "top in and bottom out" wiring form, and the connecting pipe mother 3 is installed horizontally to connect the "bottom out" wiring terminals of the positive electrode energy consumption valve tower 1 and the negative electrode energy consumption valve tower 2.

[0029] The insulating support structure 4 is arranged at the bottom of the valve tower. The insulating support structure 4 includes: post insulators and oblique insulators. The post insulators and oblique insulators are connected by hinges, thereby improving the stability of the support structure.

[0030] The multi-layer valve switch structure also includes interlayer support insulators and metal structural parts. The interlayer support insulators raise the layer structure of the valve tower in sequence to ensure electrical insulation and creepage design between layers; a valve layer maintenance platform is set in the middle of the valve layer to facilitate personnel installation and maintenance operations.

[0031] The valve section structure, consisting of a valve section support structure and multiple power modules, can be hoisted as a whole, shortening valve tower construction time. The valve section support structure is external to the power module, which is equipped with a power module hub. A metal beam and multiple insulating beams are bolted together to form the valve section support structure. Slide rails are installed on the insulating beams, aligning with the power module hubs. This allows the power module to be retracted, facilitating subsequent replacement while also securing the module.

[0032] All power modules in the positive electrode energy-consuming valve tower 1 and the negative electrode energy-consuming valve tower 2 adopt a series structure.

[0033] The insulating beam is fixed with an optical fiber groove, which can shorten the wiring distance to the maximum, effectively utilize the space and beautify the valve tower.

[0034] Optical fibers that provide communication to the power modules are laid in the optical fiber slots.

[0035] 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 valve tower for an ultra-high voltage direct current energy dissipation device, comprising: A positive electrode energy-consuming valve tower (1), a negative electrode energy-consuming valve tower (2), and a connecting pipe mother (3) connecting the positive electrode energy-consuming valve tower (1) and the negative electrode energy-consuming valve tower (2); characterized in that: The positive electrode energy-consuming valve tower (1) and the negative electrode energy-consuming valve tower (2) are arranged symmetrically in the shape of a line; the positive electrode energy-consuming valve tower (1) and the negative electrode energy-consuming valve tower (2) comprise: an insulating support structure (4) and a multi-layer valve switch (5) structure; a plurality of valve layers are arranged between the multi-layer valve switch (5) structures; the valve layers are a plurality of valve sections that are symmetrical on the left and right, the left and right valve sections are arranged back to back, and each layer of the valve tower is connected in a U-shape.

2. The valve tower of the ultra-high voltage direct current energy dissipation device according to claim 1, characterized in that: The positive electrode energy-consuming valve tower (1) and the negative electrode energy-consuming valve tower (2) both adopt a "top-in, bottom-out" wiring form, and the connecting pipe mother (3) adopts a horizontal installation mode to connect the "bottom-out" wiring terminals of the positive electrode energy-consuming valve tower (1) and the negative electrode energy-consuming valve tower (2).

3. The valve tower of the ultra-high voltage direct current energy dissipation device according to claim 1, characterized in that: The positive electrode energy-consuming valve tower (1) and the negative electrode energy-consuming valve tower (2) are designed as mirror-image structures.

4. The valve tower of the ultra-high voltage direct current energy dissipation device according to claim 1, characterized in that: The insulating support structure (4) is arranged at the bottom of the valve tower, and the insulating support structure (4) comprises: a post insulator and a diagonal insulator; the post insulator and the diagonal insulator are connected via a hinge.

5. The valve tower of the ultra-high voltage direct current energy dissipation device according to claim 1, characterized in that: The multi-layer valve switch (5) structure also includes interlayer support insulators and metal structural parts.

6. The valve tower of the ultra-high voltage direct current energy dissipation device according to claim 1, characterized in that: The valve section includes: a valve section support structure and a plurality of power modules. The valve section support structure is arranged outside the power module, and a power module hub is arranged on the power module.

7. The valve tower of the ultra-high voltage direct current energy dissipation device according to claim 1 or 6, characterized in that: The metal beam and multiple insulating beams are combined into a valve section support structure by bolt connection, and a slide rail that cooperates with the power module hub is provided on the insulating beam.

8. The valve tower of the ultra-high voltage direct current energy dissipation device according to claim 6, characterized in that: All power modules in the positive electrode energy-consuming valve tower (1) and the negative electrode energy-consuming valve tower (2) adopt a series structure.

9. The valve tower of the ultra-high voltage direct current energy dissipation device according to claim 7, characterized in that: An optical fiber groove is fixed on the insulating beam, and an optical fiber providing communication for the power module is laid in the optical fiber groove.

10. The valve tower of the ultra-high voltage direct current energy dissipation device according to claim 1, characterized in that: A valve layer maintenance platform is provided in the middle of the valve layer.

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