Extra-high voltage ac transmission anti-seismic shunt capacitor device

Abstract

The utility model discloses a kind of extra-high voltage ac transmission anti-seismic shunt capacitor device, including anti-inversion structure, the inside of the anti-inversion structure is embedded and is equipped with mounting base, the upper surface of the mounting base is fixedly connected with connection structure, the upper surface of the connection structure is fixedly connected with capacitor main body, the capacitor main body includes shunt porcelain head, capacitor body, overvoltage protection box, insulator root layer, through-hole, the upper surface of the capacitor body is embedded and is connected with shunt porcelain head, the front surface of the capacitor body is fixedly connected with overvoltage protection box, the lower surface of the capacitor body is fixedly connected with insulator root layer, the upper surface of the insulator root layer is located in four corner positions and is equipped with through-hole. The utility model said a kind of extra-high voltage ac transmission anti-seismic shunt capacitor device, can be shock-absorbed to capacitor main body, can be protected when capacitor main body is tilted.

Description

Technical Field

[0001] This utility model relates to the field of parallel capacitors, and in particular to an anti-seismic parallel capacitor device for ultra-high voltage AC transmission. Background Technology

[0002] Parallel capacitor banks are core equipment in power systems used for reactive power compensation and improving power quality. By connecting capacitive reactive power in parallel to the power grid, they offset the reactive power consumed by inductive loads (such as motors and transformers), thereby achieving the goals of improving power factor, reducing line loss, and stabilizing voltage. Ultra-high voltage AC transmission seismic-resistant parallel capacitor banks are core equipment to ensure the stable operation of 1000kV and above ultra-high voltage power grids. Their design must take into account reactive power compensation efficiency, high voltage insulation, high current carrying capacity, and strong earthquake resistance. Existing patent application CN201820372905.5 describes a high-voltage parallel capacitor device, whose structure includes a handwheel, fixing screws, capacitor body, parallel ceramic heads, overvoltage protection box, screws, and a convenient fixing device. The upper surface of the convenient fixing device is threaded and fits against the lower surface of the capacitor body, and the parallel ceramic heads are embedded and installed on the upper surface of the capacitor body. This utility model discloses a high-voltage parallel capacitor device with a convenient fixing device. The convenient fixing device is installed on the equipment, and the handwheel drives the screw, which in turn drives the sliding plate to open. The method involves pulling the front slide plate to place the capacitor into the fixing device. The spring compresses the front slide plate, which then presses and fixes the capacitor. Rotating the handwheel in the opposite direction drives the screw, which fixes the sliding plate in place. This convenient fixing device saves a lot of time and speeds up the work. However, this application only achieves the purpose of convenient fixing and cannot play a role in shock absorption. It is prone to damage in the event of an earthquake, and when the capacitor tilts, it can easily damage surrounding objects and cause leakage. Therefore, we propose an ultra-high voltage AC transmission anti-seismic parallel capacitor device. Utility Model Content

[0003] The main purpose of this utility model is to provide an ultra-high voltage AC transmission anti-seismic parallel capacitor device, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A seismic-resistant parallel capacitor device for ultra-high voltage AC transmission includes an anti-tipping structure. An installation base is embedded inside the anti-tipping structure. A connecting structure is fixedly connected to the upper surface of the installation base. A capacitor body is fixedly connected to the upper surface of the connecting structure.

[0005] Furthermore, the capacitor body includes a parallel ceramic head, a capacitor body, an overvoltage protection box, an insulator root layer, and through holes. The parallel ceramic head is embedded and connected to the upper surface of the capacitor body. The overvoltage protection box is fixedly connected to the front surface of the capacitor body. The insulator root layer is fixedly connected to the lower surface of the capacitor body. Through holes are opened at the four corners of the upper surface of the insulator root layer.

[0006] Furthermore, the connection structure includes an insulating platform, a nut, a silicone grease buffer layer, and threaded rods. Threaded rods are fixedly installed at the four corners of the upper surface of the insulating platform. Nuts are fitted onto the surfaces of the threaded rods, and silicone grease buffer layers are fitted onto the surfaces of the threaded rods below the nuts.

[0007] Furthermore, the mounting base includes a base plate, a first sleeve, a second sleeve, a flow groove, a telescopic tube, and a spring. The upper surface of the base plate is fixedly mounted with a first sleeve, and there are four sets of the first sleeves. The upper surface of each first sleeve is embedded with a second sleeve, and the lower surface of each second sleeve is provided with a flow groove. A telescopic tube is fixedly connected between each second sleeve and the first sleeve, and a spring is embedded inside each telescopic tube.

[0008] Furthermore, the root layer of the insulator is located above the insulating platform, the threaded rods are respectively embedded in the inside of the through holes, and the second sleeves are respectively fixedly installed on the lower surface of the insulating platform at the four corners.

[0009] Furthermore, the anti-tipping structure includes support columns, a fence, L-shaped plates, and fixing holes. Support columns are fixedly installed on the upper surface of the fence, and there are multiple sets of support columns. L-shaped plates are fixedly installed on both sides of the fence, and fixing holes are provided on the upper surface of each L-shaped plate, and there are multiple sets of fixing holes.

[0010] Furthermore, the fence is installed on the surface of the insulating platform and the root layer of the insulator, and is located above the base plate.

[0011] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are: The connection structure ensures an insulated connection between the capacitor body and the mounting base, which helps prevent abnormal current flow and thus avoids leakage. The installed mounting base can dampen the capacitor body when it shakes, even during an earthquake. The anti-tipping structure can protect the capacitor body and prevent it from tipping over, thus avoiding greater losses. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front view of the capacitor body of this utility model; Figure 3 This is a detailed drawing of the anti-tipping structure of this utility model; Figure 4 This is a cross-sectional view of the root layer of the insulator of this utility model; Figure 5 This is a cross-sectional view of the first sleeve of this utility model; Figure 6 For the present utility model Figure 4 A magnified view of the details at point A.

[0013] In the diagram: 1. Capacitor body; 101. Parallel ceramic head; 102. Capacitor body; 103. Overvoltage protection box; 104. Insulator root layer; 105. Through hole; 2. Anti-tipping structure; 201. Support column; 202. Fence; 203. L-shaped plate; 204. Fixing hole; 3. Mounting base; 301. Base plate; 302. First sleeve; 303. Second sleeve; 304. Flow groove; 305. Telescopic tube; 306. Spring; 4. Connection structure; 401. Insulating platform; 402. Nut; 403. Silicone grease buffer layer; 404. Threaded rod. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0015] Reference Figure 1-6 A shock-resistant parallel capacitor device for ultra-high voltage AC transmission includes an anti-tipping structure 2, an installation base 3 is embedded inside the anti-tipping structure 2, a connecting structure 4 is fixedly connected to the upper surface of the installation base 3, and a capacitor body 1 is fixedly connected to the upper surface of the connecting structure 4. Specifically, the capacitor body 1 is connected and installed to the mounting base 3 through the connecting structure 4. The mounting base 3 provides shock absorption support for the capacitor body 1, and the anti-tipping structure 2 protects the capacitor body 1.

[0016] In a preferred embodiment, the capacitor body 1 includes a parallel ceramic head 101, a capacitor body 102, an overvoltage protection box 103, an insulator root layer 104, and through holes 105. The parallel ceramic head 101 is embedded and connected to the upper surface of the capacitor body 102. The overvoltage protection box 103 is fixedly connected to the front surface of the capacitor body 102. The insulator root layer 104 is fixedly connected to the lower surface of the capacitor body 102. Through holes 105 are opened at the four corners of the upper surface of the insulator root layer 104. Specifically, the capacitor body 102 is insulated by the insulator root layer 104. The capacitor body 102 and the parallel porcelain head 101 are used on the transmission side (such as 220kV / 500kV substations) and ultra-high voltage projects, with a capacity of 50~300Mvar. The overvoltage protection box 103 can play the role of overvoltage protection. The through holes 105 are distributed on the upper surface of the insulator root layer 104 at the four corners. The upper surface of the insulator root layer 104 is connected to the bottom of the capacitor body 102.

[0017] In a preferred embodiment, the connecting structure 4 includes an insulating platform 401, a nut 402, a silicone grease buffer layer 403, and a threaded rod 404. The upper surface of the insulating platform 401 is fixedly installed with threaded rods 404 at the four corners. Nuts 402 are sleeved on the surface of each threaded rod 404. The surface of each threaded rod 404 below the nuts 402 is sleeved with a silicone grease buffer layer 403. Specifically, the insulating platform 401 is fixed by nuts 402, silicone grease buffer layer 403, and threaded rods 404. The threaded rods 404 are distributed on the upper surface of the insulating platform 401 at the four corners, and the surface of the threaded rods 404 is provided with threads. The silicone grease buffer layer 403 is a flexible thin layer / pad layer formed between equipment components (such as metal shell and insulating parts, heating elements and heat dissipation structure, vibration parts and fixed brackets) through coating, filling or molding processes using silicone grease as the base material. Its essence is to use the "high elasticity, low hardness and chemical stability" of silicone grease to absorb the stress generated by mechanical impact or thermal deformation, while also having additional functions such as insulation, heat conduction and sealing, to ensure the structural integrity and performance stability of the equipment.

[0018] In a preferred embodiment, the mounting base 3 includes a base plate 301, a first sleeve 302, a second sleeve 303, a flow groove 304, a telescopic tube 305, and a spring 306. The first sleeve 302 is fixedly installed on the upper surface of the base plate 301. There are four sets of first sleeves 302. The second sleeve 303 is embedded in the upper surface of each first sleeve 302. The flow groove 304 is opened on the lower surface of each second sleeve 303. The telescopic tube 305 is fixedly connected between each second sleeve 303 and the first sleeve 302. The spring 306 is embedded in the interior of each telescopic tube 305. Specifically, the telescopic tube 305 and spring 306 control the extension and retraction of the first sleeve 302 and the second sleeve 303. The base plate 301 is used to fix the entire device. A sealing gasket is provided between the first sleeve 302 and the second sleeve 303, and the inside of the first sleeve 302 is filled with hydraulic oil. The flow groove 304 is the only communication path between the second sleeve 303 and the first sleeve 302. The telescopic tube 305 is used to protect the spring 306, thereby preventing the hydraulic oil from corroding the spring 306. When there is no external force, the hydraulic oil is stored inside the first sleeve 302 under its own gravity. 306 is in the released state, that is, the telescopic tube 305 is pushed to extend. When the second sleeve 303 is under pressure, the second sleeve 303 moves into the interior of the first sleeve 302, thereby compressing the spring 306 and shortening the telescopic tube 305. The spring 306 has elastic force. At the same time as the second sleeve 303 is pressed down, the hydraulic oil inside the first sleeve 302 slowly enters the interior of the second sleeve 303 through the flow groove 304. When the external pressure on the second sleeve 303 disappears, the hydraulic oil slowly returns to the interior of the first sleeve 302, thereby reducing the elastic force of the spring 306 and thus achieving buffering and shock absorption.

[0019] In a preferred embodiment, the insulator root layer 104 is located above the insulation platform 401, the threaded rods 404 are respectively embedded in the through holes 105, and the second sleeves 303 are respectively fixedly installed on the lower surface of the insulation platform 401 at the four corners. Specifically, by placing the insulator root layer 104 above the insulating platform 401, the threaded rod 404 is placed inside the through hole 105, and the nut 402 is tightened to achieve fixation. By placing the second sleeve 303 on the lower surface of the insulating platform 401, the mounting base 3 provides buffering and shock absorption for the capacitor body 1 and the connecting structure 4.

[0020] In a preferred embodiment, the anti-tipping structure 2 includes support columns 201, a fence 202, an L-shaped plate 203, and fixing holes 204. The support columns 201 are fixedly installed on the upper surface of the fence 202. There are multiple sets of support columns 201. The L-shaped plates 203 are fixedly installed on both sides of the fence 202. The upper surface of the L-shaped plates 203 is provided with fixing holes 204. There are multiple sets of fixing holes 204. Specifically, the mounting base 3 and the connecting structure 4 are enclosed by the fence 202, and the capacitor body 1 is protected by the support column 201 without affecting the wiring. The fixing is achieved by the fixing hole 204 and the L-shaped plate 203. The fixing hole 204 has a thread inside, and the L-shaped plate 203 can be installed by bolts.

[0021] In a preferred embodiment, the fence 202 is fitted onto the surface of the insulating platform 401 and the insulator root layer 104, and is located above the base plate 301.

[0022] Specifically, by placing the fence 202 on the surface of the insulating platform 401 and the insulator root layer 104, the support column 201 is positioned around the capacitor body 1, thus protecting the capacitor body 1.

[0023] It should be noted that when the second sleeve 303 is under pressure, the telescopic tube 305 and the spring 306 are compressed, and hydraulic oil enters the interior of the second sleeve 303. When the pressure is reduced or disappears, the telescopic tube 305 and the spring 306 are reset, and the hydraulic oil returns to the interior of the first sleeve 302, thereby achieving buffering. When the capacitor body 1 tilts, it is supported and protected by the support column 201 and the fence 202.

[0024] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A seismic-resistant parallel capacitor device for ultra-high voltage AC transmission, characterized in that: It includes an anti-tipping structure (2), in which an installation base (3) is embedded, and a connecting structure (4) is fixedly connected to the upper surface of the installation base (3), and a capacitor body (1) is fixedly connected to the upper surface of the connecting structure (4).

2. The UHV AC transmission anti-seismic parallel capacitor device according to claim 1, characterized in that: The capacitor body (1) includes a parallel ceramic head (101), a capacitor body (102), an overvoltage protection box (103), an insulator root layer (104), and a through hole (105). The parallel ceramic head (101) is embedded and connected to the upper surface of the capacitor body (102). The overvoltage protection box (103) is fixedly connected to the front surface of the capacitor body (102). The insulator root layer (104) is fixedly connected to the lower surface of the capacitor body (102). Through holes (105) are opened at the four corners of the upper surface of the insulator root layer (104).

3. The UHV AC transmission anti-seismic parallel capacitor device according to claim 2, characterized in that: The connection structure (4) includes an insulating platform (401), a nut (402), a silicone grease buffer layer (403), and a threaded rod (404). The upper surface of the insulating platform (401) is fixedly installed with threaded rods (404) at the four corners. Nuts (402) are fitted onto the surface of the threaded rods (404). A silicone grease buffer layer (403) is fitted onto the surface of the threaded rods (404) below the nuts (402).

4. The UHV AC transmission anti-seismic parallel capacitor device according to claim 3, characterized in that: The mounting base (3) includes a base plate (301), a first sleeve (302), a second sleeve (303), a flow groove (304), a telescopic tube (305), and a spring (306). The first sleeve (302) is fixedly installed on the upper surface of the base plate (301). There are four sets of the first sleeve (302). The second sleeve (303) is embedded in the upper surface of each of the first sleeves (302). The flow groove (304) is opened on the lower surface of each of the second sleeves (303). The telescopic tube (305) is fixedly connected between the second sleeve (303) and the first sleeve (302). The spring (306) is embedded in the interior of each telescopic tube (305).

5. A seismic-resistant parallel capacitor device for ultra-high voltage AC transmission according to claim 4, characterized in that: The root layer (104) of the insulator is located above the insulating platform (401), the threaded rods (404) are respectively embedded in the inside of the through hole (105), and the second sleeve (303) is respectively fixedly installed on the lower surface of the insulating platform (401) at the four corners.

6. The UHV AC transmission anti-seismic parallel capacitor device according to claim 5, characterized in that: The anti-tipping structure (2) includes a support column (201), a fence (202), an L-shaped plate (203), and fixing holes (204). The upper surface of the fence (202) is fixedly equipped with a support column (201), and there are multiple sets of support columns (201). Both sides of the fence (202) are fixedly equipped with L-shaped plates (203), and the upper surface of the L-shaped plates (203) is provided with fixing holes (204), and there are multiple sets of fixing holes (204).

7. A seismic-resistant parallel capacitor device for ultra-high voltage AC transmission according to claim 6, characterized in that: The fence (202) is fitted and installed on the surface of the insulating platform (401) and the root layer (104) of the insulator, and is located above the base plate (301).

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