Alternating-current power distribution device and alternating-current filter power distribution device same-layer arrangement system

By using a same-layer layout system designed with gas insulated switch equipment in high altitude and complex terrain sites, the problem of large footprints and inability to be arranged in the same-layer structure in the prior art is solved, and space saving and safety are achieved It has improved its sexuality and adapted to the conditions of sites such as the mountain canyon.

CN119315388APending Publication Date: 2025-01-14SOUTHWEST ELECTRIC POWER DESIGN INST OF CHINA POWER ENG CONSULTING GROUP CORP
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Patent Information

Application Number
CN202411643373.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-18
Publication Date
2025-01-14

AI Technical Summary

Technical Problem

In the prior art, the AC filter distribution device adopts an open type device, and requires a double-layer structure to meet the connection of the double-layer busbar, resulting in a large area, and the AC distribution device cannot be arranged on the same level as the filter distribution device. , cannot meet the needs of complex terrain and high-altitude stations.

Method used

The AC filter distribution device designed with gas insulated switch equipment (GIS) is arranged on the same floor as the AC distribution device. The filter distribution device is placed between the series of power distribution devices, sharing a GIS room, and canceling the double-layer structure , adopts gas insulated busbars and compact design GIS equipment to reduce the footprint.

Benefits of technology

It significantly reduces the area of ​​AC filter distribution devices, improves the utilization rate of AC distribution devices in the ±800kV converter station, adapts to areas with limited site conditions such as alpine canyons, and provides better space savings and Security.

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Abstract

The invention relates to the technical field of alternating-current power distribution networks, and aims to solve the problems that in the prior art, a filter power distribution device adopts open-type equipment, a double-layer framework is needed to meet connection of double-layer buses, and an alternating-current power distribution device cannot be placed in the same layer space with the filter power distribution device, so that the overall occupied area is large. The invention provides a same-layer arrangement system for alternating-current power distribution devices and alternating-current filter power distribution devices, which comprises the alternating-current power distribution devices and the alternating-current filter power distribution devices which adopt gas insulated switchgear and are arranged on the same layer, and the alternating-current filter power distribution devices are arranged between strings of the alternating-current power distribution devices; the alternating-current filter power distribution device of a single small group is connected to a filter small group pipeline, one end of the filter small group pipeline is connected to a filter large group bus through the alternating-current filter power distribution device of the small group, the other end of the filter small group pipeline is connected with equipment in a fence through a wire outlet sleeve, and the filter large group bus and the filter small group pipeline are arranged on the same layer. And the filter large-group bus is connected with the AC power distribution device bus.
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Description

Technical Field

[0001] The present invention relates to the technical field of AC distribution networks, and more particularly, to a system for arranging an AC distribution device and an AC filter distribution device on the same floor. Background Art

[0002] The valve hall of a UHV DC converter station is the most core component of a DC transmission project and is crucial for the reliable and safe operation of the DC transmission system.

[0003] Conventional ±800kV converter stations currently mainly include basic modules such as a converter yard area, a DC yard area, an AC yard area, a low-voltage reactive power area, and an AC filter area. Among them, gas-insulated switchgear (GIS) is mostly used for the AC distribution device in the AC yard; the AC filter yard mostly adopts an improved "field" shape or a new improved "field" shape layout, and the AC filter distribution device is of an open type. For converter station sites with special terrains such as high altitude and limited layout conditions, the above-mentioned partial modules and equipment selection principles are often no longer applicable, that is, the conventional distribution device modules cannot adapt to the complex terrain requirements, and the conventional equipment selection cannot meet the actual engineering needs.

[0004] The disadvantages of this layout scheme are as follows:

[0005] As Figure 1 and Figure 2 shown, since the AC filter distribution device uses open-type equipment and the busbars are overhead busbars. In the area of the AC filter distribution device, high and low double-layer frameworks need to be set up. The large-group busbars of the filters are arranged on the upper layer, and the small-group busbars of the filters are arranged on the lower layer. The three-phase upper-layer large-group busbars are connected to the corresponding lower-layer small-group busbars of the corresponding phases through down-lead wires. The AC filter distribution device is arranged below the large-group busbars of the filters, and the three-phase small-group busbars are connected to the corresponding AC filter distribution devices through down-lead wires. In summary, this scheme requires a double-layer framework to meet the connection of the double-layer busbars, and at the same time, the filter distribution device is placed on the bottom layer, and the overall floor area of the filter distribution device is relatively large.

[0006] Since the AC distribution device uses GIS, it cannot be arranged in the same place as the open-type filter distribution device in terms of space. And since the filter framework already adopts a double-layer layout, it cannot be stacked with the AC distribution device either. Summary of the Invention

[0007] The present invention aims to provide a system for arranging an AC distribution device and an AC filter distribution device on the same floor to solve the problem in the prior art that the filter distribution device uses open-type equipment, requires a double-layer framework to meet the connection of the double-layer busbars, and the AC distribution device cannot be placed on the same floor space as it, resulting in a relatively large overall floor area.

[0008] The present invention is achieved by adopting the following technical solutions:

[0009] The present invention provides a system for arranging an AC power distribution device and an AC filter power distribution device on the same floor, comprising an AC power distribution device and an AC filter power distribution device, wherein both the AC power distribution device and the AC filter power distribution device adopt gas insulated switchgear;

[0010] The AC power distribution device and the AC filter power distribution device are arranged on the same layer, and the AC filter power distribution device is arranged between the strings of the AC power distribution devices;

[0011] The AC filter distribution device of a single group is connected to the filter group pipeline, one end of the filter group pipeline is connected to the filter group bus through the group's AC filter distribution device, and the other end of the filter group pipeline is connected to the equipment in the fence through the outlet bushing. The filter group bus and the filter group pipeline are arranged on the same layer, and the filter group bus is connected to the AC distribution device bus.

[0012] The AC filter power distribution device of the present invention adopts a gas-insulated switchgear, and has the advantages of small footprint, high operational reliability, and convenient overhaul and maintenance.

[0013] The AC filter power distribution device of the present invention adopts the arrangement of GIS equipment and the AC power distribution device on the same floor, and the AC filter power distribution device is arranged between strings of the AC power distribution device, which is beneficial to saving floor space.

[0014] As the preferred technical solution:

[0015] The AC power distribution device and the AC filter power distribution device are arranged in a one-story GIS room, and the two are arranged crosswise in the GIS room.

[0016] As the preferred technical solution:

[0017] The large filter group busbar and the small filter group pipeline both adopt gas-insulated busbars.

[0018] As the preferred technical solution:

[0019] The busbars of the large filter group are arranged along the busbar direction of the AC power distribution device.

[0020] As the preferred technical solution:

[0021] The large filter group busbar is arranged at the side and below the busbar of the AC power distribution device, and the large filter group busbar is connected to the busbar of the AC power distribution device through a gas-insulated busbar.

[0022] As the preferred technical solution:

[0023] The AC filter power distribution device comprises an isolating switch, a grounding switch, a circuit breaker, and a current transformer, and these devices adopt gas-insulated switchgear.

[0024] As the preferred technical solution:

[0025] The shell of the AC filter power distribution device is not charged as a whole, and is filled with SF6 insulating gas for insulation.

[0026] As the preferred technical solution:

[0027] The other end of the filter group pipeline passes through the outlet bushing and is connected to the equipment in the fence via an open grounding switch.

[0028] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0029] 1. The present invention provides a system for arranging an AC power distribution device and an AC filter power distribution device on the same floor. The AC filter power distribution device adopts GIS equipment, which is arranged crosswise on the same floor with the AC power distribution device, and shares a GIS room on the same floor. The AC filter power distribution device is connected to the AC power distribution device busbar by connecting the large filter group busbar to the AC power distribution device busbar, thereby realizing the connection between the AC filter power distribution device and the AC power distribution device, and realizing the electrical connection of the power distribution device.

[0030] 2. The present invention arranges the busbar of the large filter group along the direction of the busbar of the AC power distribution device, and arranges the busbar of the large filter group below the busbar side of the AC power distribution device, which is convenient for stringing at any position in the string, and also convenient for connecting the AC filter distribution device connected to each filter group pipeline with the busbar of the large filter group.

[0031] 3. The AC filter distribution device in the present invention adopts GIS equipment. GIS equipment has the advantages of space saving and good safety. The GIS equipment adopts a compact design, which integrates components such as circuit breakers, disconnectors, grounding switches, current transformers, and voltage transformers in a closed gas-insulated shell, which greatly reduces the footprint of the equipment. Due to the compact design of the GIS equipment, multiple equipment modules can be arranged on the same plane without the need for layered arrangement. Therefore, the present invention arranges the AC distribution device and the filter distribution device together on one layer, and adopts a cross-arrangement method, which significantly reduces the footprint of the AC filter distribution device and improves the utilization rate of the AC distribution device area of ​​the ±800kV converter station. It has good adaptability to areas with limited site conditions such as high mountains and canyons, and also enriches the site selection. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The plan view of the open filter power distribution device in the prior art.

[0033] Figure 2 It is a cross-sectional view of an open filter power distribution device in the prior art.

[0034] Figure 3 This is a plan view of a system in which the AC power distribution device and the AC filter power distribution device described in the present invention are arranged on the same floor.

[0035] Figure 4 The cross section of the system of arranging the AC power distribution device and the AC filter power distribution device on the same floor according to the present invention Figure 1 .

[0036] Figure 5 The cross section of the system of arranging the AC power distribution device and the AC filter power distribution device on the same floor according to the present invention Figure 2 .

[0037] Icons: 1-AC distribution device, 2-AC filter distribution device, 3-connecting part between AC distribution device and AC filter distribution device, 4-isolating switch, 5-earthing switch, 6-current transformer, 7-circuit breaker, 8-filter group pipeline, 9-filter group busbar, 10-outgoing bushing, 11-filter group incoming bushing, 12-AC distribution device busbar, 13-circuit breaker in AC distribution device string, 14-branch busbar, 15-500kV filter relay room, 16-filter group incoming string. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Example 1

[0040] like Figure 3-Figure 5 As shown, this embodiment proposes a system in which an AC power distribution device and an AC filter power distribution device are arranged on the same floor, including an AC power distribution device 1 and an AC filter power distribution device 2, wherein both the AC power distribution device 1 and the AC filter power distribution device 2 adopt gas insulated switchgear (GAS insulated SWITCHGEAR, referred to as GIS).

[0041] After the AC filter power distribution device 2 adopts GIS, the entire shell is not charged and insulation is achieved by filling SF6 insulating gas inside.

[0042] The AC filter distribution device 2 of a single group is connected to the filter group pipeline 8, one end of the filter group pipeline 8 is connected to the filter group bus 9 through the AC filter distribution device 2 of the group, and the other end of the filter group pipeline 8 is connected to the equipment (filter) in the fence through the outlet bushing 10 and the open grounding switch.

[0043] In order to save floor space, the AC filter distribution device 2 and the AC distribution device 1 are arranged on the same floor and cross-arranged. The AC filter distribution device 2 is arranged between the strings of the AC distribution device 1. The AC distribution device 1 and the AC filter distribution device 2 share a GIS room on the same floor.

[0044] The AC filter power distribution device 2 adopts single busbar wiring, the large filter group busbar 9 adopts a through-length arrangement, the large filter group busbar 9 and the small filter group pipeline 8 are arranged on the same layer and connected within the same layer, eliminating the double-layer structure in the prior art.

[0045] Since the AC power distribution device 1 adopts 3 / 2 wiring, three circuit breakers are connected in series (between the AC busbars, i.e. Figure 3 There is only an AC distribution device bus 12 between the circuit breaker 13 in the AC distribution device string and the string shown in the figure. Therefore, the AC filter distribution device 2 can be arranged between the strings of the AC distribution device 1.

[0046] The large filter group bus 9 is arranged along the entire length of the AC distribution device bus 12. The large filter group bus 9 is arranged at the lower side of the AC distribution device bus 12, which is convenient for stringing at any position within the string, and also convenient for connecting the AC filter distribution device 2 connected to each filter group pipeline 8 with the large filter group bus 9.

[0047] The filter group busbar 9 is connected to the AC power distribution device busbar 12 to realize the electrical connection between the AC power distribution device 1 and the AC filter power distribution device 2. The filter group busbar 9 is connected to the AC power distribution device busbar 12 through a gas-insulated busbar. This structure eliminates the bushing between the AC power distribution device 1 and the AC filter power distribution device 2.

[0048] The large filter group busbar 9 and the small filter group pipeline 8 are both gas-insulated busbars.

[0049] The AC filter power distribution device 2 includes an isolating switch 4, a grounding switch 5, a circuit breaker 7, a current transformer 6 and other equipment. Except for the grounding switch outside the fence, which needs to be an open device according to operating habits, all of these equipments are gas-insulated switchgear.

[0050] The AC filter power distribution device 2 is connected between the filter large group bus 9 and the filter small group pipeline 8 in the following order: disconnector 4, grounding switch 5, current transformer 6, circuit breaker 7, current transformer 6, grounding switch 5.

[0051] The AC filter power distribution device 2 adopts GIS, wherein the circuit breaker 7 is preferably arranged horizontally to reduce the building width of the GIS room; the filter busbar 9 is preferably arranged in a three-phase vertical manner to reduce the building width of the GIS room; the AC filter high-voltage capacitor group is preferably arranged in a single tower to reduce the floor space; all equipment on the outgoing side of the circuit breaker 7 can be integrated inside the GIS equipment to reduce the occupied area. The circuit breaker 7 is arranged at a low position, and the current transformer 6, the disconnector 4 and the grounding switch 5 are arranged vertically on both sides of the circuit breaker 7.

[0052] In the figure, reference numeral 3 is the connection part between the AC power distribution device and the AC filter power distribution device, reference numeral 14 is the branch bus, reference numeral 15 is the 500kV filter relay room, reference numeral 16 is the filter group series entry.

[0053] The AC power distribution device and the AC filter power distribution device are arranged on the same layer in a system provided in this embodiment, and the AC power distribution device 1 and the AC filter power distribution device 2 are arranged crosswise on the same layer, which significantly reduces the footprint of the AC filter power distribution device 2. It has good adaptability to areas with limited site conditions such as high mountains and canyons, and also enriches the site selection.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A system in which an AC power distribution device and an AC filter power distribution device are arranged on the same floor, characterized in that: It includes an AC power distribution device and an AC filter power distribution device, both of which use gas-insulated switchgear; The AC power distribution device and the AC filter power distribution device are arranged on the same layer, and the AC filter power distribution device is arranged between the strings of the AC power distribution devices; The AC filter distribution device of a single group is connected to the filter group pipeline, one end of the filter group pipeline is connected to the filter group bus through the group's AC filter distribution device, and the other end of the filter group pipeline is connected to the equipment in the fence through the outlet bushing. The filter group bus and the filter group pipeline are arranged on the same layer, and the filter group bus is connected to the AC distribution device bus.

2. The same-layer arrangement system of the AC power distribution device and the AC filter power distribution device according to claim 1 is characterized in that: The AC power distribution device and the AC filter power distribution device are arranged in a one-story GIS room, and the two are arranged crosswise in the GIS room.

3. The same-layer arrangement system of the AC power distribution device and the AC filter power distribution device according to claim 1 is characterized in that: The large filter group busbar and the small filter group pipeline both adopt gas-insulated busbars.

4. The same-layer arrangement system of the AC power distribution device and the AC filter power distribution device according to claim 1 is characterized in that: The busbars of the large filter group are arranged along the busbar direction of the AC power distribution device.

5. The same-layer arrangement system of the AC power distribution device and the AC filter power distribution device according to claim 1 is characterized in that: The large filter group busbar is arranged at the side and below the busbar of the AC power distribution device, and the large filter group busbar is connected to the busbar of the AC power distribution device through a gas-insulated busbar.

6. The same-layer arrangement system of the AC power distribution device and the AC filter power distribution device according to claim 1 is characterized in that: The AC filter power distribution device comprises an isolating switch, a grounding switch, a circuit breaker, and a current transformer, and these devices adopt gas-insulated switchgear.

7. The same-layer arrangement system of the AC power distribution device and the AC filter power distribution device according to claim 1 is characterized in that: The shell of the AC filter power distribution device is not charged as a whole, and is filled with SF6 insulating gas for insulation.

8. The system for arranging the AC power distribution device and the AC filter power distribution device on the same floor according to claim 1 is characterized in that: The other end of the filter group pipeline passes through the outlet bushing and is connected to the equipment in the fence via an open grounding switch.