Layered arrangement system for alternating current power distribution device and alternating current filter power distribution device

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 stacked with the filter power distribution device, so that the overall occupied area is large. The invention provides an alternating current power distribution device and alternating current filter power distribution device layered arrangement system which comprises an alternating current power distribution device and an alternating current filter power distribution device, and both the alternating current power distribution device and the alternating current filter power distribution device adopt gas insulated switchgear. The alternating-current power distribution device and the alternating-current filter power distribution device are stacked in layers; 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, and the other end of the filter small group pipeline is connected with equipment in a fence through an outgoing line sleeve. And the filter large-group bus and the filter small-group pipeline are arranged on the same layer.

Description

Technical Field

[0001] The present invention relates to the technical field of AC distribution networks, and in particular, to a hierarchical layout system for an AC distribution device and an AC filter distribution device. 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 ±800 kV 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 for short) 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 needs of the project.

[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 busbar uses an overhead busbar. In the area of the AC filter distribution device, high and low double-layer frames need to be set up, with the large-group busbars of the filters arranged on the upper layer and the small-group busbars of the filters 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 double-layer frames 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 at the same location as the open-type filter distribution device in terms of space. And since the filter frames already adopt a double-layer layout, it is also impossible to adopt a stacked layout with the AC distribution device. Summary of the Invention

[0007] The present invention aims to provide a hierarchical layout system for an AC distribution device and an AC filter distribution device to solve the problem in the prior art that the filter distribution device uses open-type equipment, requires double-layer frames to meet the connection of the double-layer busbars, and the AC distribution device cannot adopt a stacked layout with 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 hierarchical arrangement system of an AC power distribution device and an AC filter power distribution device, 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 in layers and stacked;

[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 floor.

[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 a layered and stacked arrangement of GIS equipment and the AC power distribution device, which is beneficial to saving floor space.

[0014] As the preferred technical solution:

[0015] The filter group busbar is connected to the corresponding interval outgoing line positions of the AC power distribution device through a gas-insulated busbar.

[0016] As the preferred technical solution:

[0017] The AC power distribution device and the AC filter power distribution device are arranged in the upper and lower GIS rooms respectively.

[0018] Indoor layout is the preferred option. Under harsh environmental conditions, using indoor GIS can improve equipment operation reliability.

[0019] As the preferred technical solution:

[0020] The AC power distribution device is located on the first floor, and the AC filter power distribution device is located on the second floor.

[0021] As the preferred technical solution:

[0022] The AC power distribution device and the AC filter power distribution device are arranged in layers outdoors.

[0023] As the preferred technical solution:

[0024] The AC power distribution device and the AC filter power distribution device are arranged on an outdoor platform.

[0025] As the preferred technical solution:

[0026] The large filter group busbar and the small filter group pipeline both adopt gas-insulated busbars.

[0027] As the preferred technical solution:

[0028] The busbars of the large filter group are arranged in a through-length manner.

[0029] As the preferred technical solution:

[0030] 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.

[0031] As the preferred technical solution:

[0032] The shell of the AC filter power distribution device is not charged as a whole, and is filled with SF6 insulating gas for insulation.

[0033] As the preferred technical solution:

[0034] 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.

[0035] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0036] 1. The present invention provides a layered arrangement system of an AC power distribution device and an AC filter power distribution device, wherein the AC filter power distribution device adopts GIS equipment, and the AC filter power distribution device and the AC power distribution device are arranged in layers and stacked, sharing a two-story GIS room. The large filter group busbar is connected to the corresponding interval outlet position of the AC power distribution device through a gas-insulated busbar, so as to realize the connection between the AC filter power distribution device and the AC power distribution device, and realize the electrical connection of the power distribution device.

[0037] 2. 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, greatly reducing 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 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

[0038] Figure 1 The plan view of the open filter power distribution device in the prior art.

[0039] Figure 2 It is a cross-sectional view of an open filter power distribution device in the prior art.

[0040] Figure 3 This is a plan view of the first floor of the AC power distribution device described in the present invention.

[0041] Figure 4 This is a second-floor plan view of the AC filter power distribution device described in the present invention.

[0042] Figure 5 It is a cross-sectional view of the layered arrangement system of the AC power distribution device and the AC filter power distribution device described in the present invention.

[0043] Icons: 1-AC power distribution device, 2-AC filter power distribution device, 3-connecting part between AC power distribution device and AC filter power 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-open type earthing switch. DETAILED DESCRIPTION

[0044] 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.

[0045] Example 1

[0046] like Figure 3-Figure 5 As shown, this embodiment proposes a hierarchical arrangement system of an AC power distribution device and an AC filter power distribution device, 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).

[0047] After the AC filter power distribution device 2 adopts GIS, its entire shell is not charged and insulation is achieved by filling SF6 insulating gas inside.

[0048] 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 12.

[0049] 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.

[0050] The large filter group busbar 9 and the small filter group pipeline 8 are both gas-insulated busbars.

[0051] 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.

[0052] 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.

[0053] The filter group busbar 9 is connected to the corresponding interval outlet position of the AC power distribution device 1 through a gas-insulated busbar to achieve electrical connection between the AC power distribution device 1 and the AC filter power distribution device 2. This structure eliminates the bushing between the AC power distribution device 1 and the AC filter power distribution device 2.

[0054] In order to save floor space, the AC filter distribution device 2 and the AC distribution device 1 are stacked in layers. The GIS room has two floors, the AC distribution device 1 is placed on the first floor, and the AC filter distribution device 2 is placed on the second floor.

[0055] 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 upper GIS room; the filter group busbar 9 is preferably arranged in a three-phase vertical manner to reduce the building width of the GIS room; the width of the upper GIS room is smaller than the width of the lower GIS room, and the remaining part is designed as a terrace to facilitate the hoisting of the equipment on the second floor and save investment; the AC filter high-voltage capacitor group is preferably arranged in a single tower to reduce the footprint and better match the height of the distribution device on the second floor; all equipment on the outgoing side of the circuit breaker 7 can be integrated inside the GIS equipment, thereby reducing the width of the upper terrace. The circuit breaker 7 adopts a low-position arrangement, and the current transformer 6, the disconnector 4 and the grounding switch 5 are arranged vertically on both sides of the circuit breaker 7.

[0056] The layered arrangement system of the AC power distribution device and the AC filter power distribution device provided in this embodiment significantly reduces the footprint of the AC filter power distribution device 2, has good adaptability to areas with limited site conditions such as high mountains and valleys, and also enriches the site selection.

[0057] Example 2

[0058] The difference between this embodiment and embodiment 1 is that:

[0059] The AC power distribution device 1 and the AC filter power distribution device 2 are arranged in layers outdoors, and the AC power distribution device 1 and the AC filter power distribution device 2 are installed by setting up a platform outdoors.

[0060] 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 hierarchical arrangement system of an AC power distribution device and an AC filter power distribution device, 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 in layers and stacked; 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 floor.

2. The layered arrangement system of AC power distribution device and 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 the upper and lower GIS rooms respectively.

3. The layered arrangement system of AC power distribution device and AC filter power distribution device according to claim 2 is characterized in that: The AC power distribution device is located on the first floor, and the AC filter power distribution device is located on the second floor.

4. The layered arrangement system of AC power distribution device and 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 layers outdoors.

5. The layered arrangement system of AC power distribution device and AC filter power distribution device according to claim 4 is characterized in that: The AC power distribution device and the AC filter power distribution device are arranged on an outdoor platform.

6. The layered arrangement system of AC power distribution device and 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.

7. The layered arrangement system of AC power distribution device and AC filter power distribution device according to claim 1 is characterized in that: The busbars of the large filter group are arranged in a through-length manner.

8. The layered arrangement system of AC power distribution device and 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.

9. The layered arrangement system of AC power distribution device and AC filter power distribution device according to claim 1, 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.

10. The layered arrangement system of AC power distribution device and AC filter power distribution device according to claim 8, 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.

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