GIS equipment and electric power system

Abstract

The utility model provides a GIS device and an electric power system, the GIS device comprises a conductor and a voltage-sharing cover, one end of the conductor is connected with a bushing of a transformer; the voltage-sharing cover is detachably connected with one end of the conductor, the voltage-sharing cover is arranged on the outer side of the conductor in a covering mode in the circumferential direction of the conductor, and the voltage-sharing cover is used for shielding discharge of the conductor. The voltage-sharing cover is additionally arranged at one end, connected with the bushing of the transformer, of the conductor of the GIS equipment, the voltage-sharing cover is detachably connected with the conductor, and the voltage-sharing cover has insulation and voltage-sharing shielding effects, so that when the conductor discharges to the outer wall of the gas chamber of the GIS equipment, the voltage-sharing cover is arranged on the outer wall of the gas chamber of the GIS equipment; the voltage-sharing cover can play a voltage-sharing and shielding role on high-voltage field intensity, so that the problem that the conductor discharges to the outer wall of the gas chamber when the GIS equipment and the transformer operate and the high-voltage side GIS gas chamber is subjected to transient high-voltage impact is solved, and normal operation of the GIS equipment and the transformer is ensured.

Description

Technical Field

[0001] This utility model relates to the field of electrical engineering, and in particular to a GIS device and power system. Background Technology

[0002] High-voltage / ultra-high-voltage power transmission and transformation is a core infrastructure of the power system, and its technological development is of great significance. Among these technologies, the connection between GIS (Gas-Insulated Switchgear) equipment and transformers plays a crucial role, especially in applications with stringent requirements for space, reliability, or environmental adaptability. In these cases, using GIS equipment and transformers to transmit electrical energy has become an important technical means. GIS equipment is a compact switchgear that seals high-voltage electrical equipment (such as circuit breakers, disconnectors, grounding switches, current / voltage transformers, etc.) within a metal casing filled with insulating gas.

[0003] At present, when the transformer is pressurized to 1.8Un, the electric field at the outer edge of the high-voltage bushing of the GIS equipment and the transformer is easily distorted. This can cause the conductor at the top edge of the high-voltage bushing to discharge to the outer wall of the GIS equipment under high voltage and high field strength conditions, thus affecting the operation of the equipment. Utility Model Content

[0004] The present invention provides a GIS device and a power system to solve the discharge problem of conductors and transformer bushings of GIS device under high field strength.

[0005] This utility model provides a GIS device, which includes:

[0006] A conductor, one end of which is connected to the bushing of the transformer;

[0007] A voltage equalization shield is detachably connected to one end of the conductor and is disposed around the outside of the conductor along the circumference of the conductor. The voltage equalization shield is used to shield the conductor from discharge.

[0008] In the GIS device provided by this utility model, one end of the conductor is provided with an outer edge, the outer edge extends outward along the circumference of the conductor, and the top end of the outer edge is detachably connected to the equalizing cover.

[0009] In the GIS equipment provided by this utility model, the outer edge is a circular structure, and the diameter of the outer edge is equal to the diameter of the sleeve.

[0010] In the GIS device provided by this utility model, the GIS device further includes a flexible connection component and a shield. The flexible connection component is connected to the other end of the conductor, and the shield is provided on the outside of the flexible connection component and is slidably connected to the conductor along the height direction of the conductor.

[0011] In the GIS device provided by this utility model, the top end of the outer edge includes a fixed part and a protrusion. The protrusion is disposed close to the conductor and is used to limit the equalizing cover. The fixed part is disposed adjacent to the protrusion and is detachably connected to the equalizing cover.

[0012] In the GIS equipment provided by this utility model, the width of the protrusion is equal to the thickness of the shielding cover.

[0013] In the GIS equipment provided by this utility model, the inner side of the pressure equalization cover facing the protrusion has a planar structure, and the inner side is closely fitted with one side of the protrusion.

[0014] In the GIS equipment provided by this utility model, the outer surface of the equalizing cover has an arc-shaped structure. The outer surface extends upward from one end fixed to the outer edge and gradually narrows towards the conductor.

[0015] In the GIS equipment provided by this utility model, the pressure equalization cover and the outer edge are fixed by screws.

[0016] This utility model also provides a power system, which includes:

[0017] GIS equipment, wherein the GIS equipment is any of the GIS equipment described above.

[0018] This application adds a voltage equalization shield to one end of the connection between the conductor of the GIS equipment and the bushing of the transformer. The voltage equalization shield is detachably connected to the conductor and has insulation and voltage equalization shielding functions. When the conductor discharges to the outer wall of the GIS equipment's gas chamber, the voltage equalization shield can provide voltage equalization shielding against high voltage field strength. This solves the problem of the conductor discharging to the outer wall of the gas chamber on the high-voltage side during operation of the GIS equipment and the transformer, when the gas chamber is subjected to transient high voltage impact, thereby ensuring the normal operation of the GIS equipment and the transformer. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a structural diagram of the GIS equipment during normal operation in an embodiment of this utility model;

[0021] Figure 2 This is a structural diagram of the GIS equipment under maintenance in an embodiment of this utility model;

[0022] Figure 3 This is an assembly diagram of the GIS equipment and transformer in an embodiment of this utility model.

[0023] The labels for the attached figures are as follows:

[0024] 1. GIS equipment; 11. Conductor; 110. Outer edge; 111. Fixing part; 112. Protrusion; 12. Equalizing cover; 13. Flexible connection assembly; 14. Shielding cover; 15. Screw; 2. Transformer; 21. Bushing. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0026] Reference Figures 1 to 3 The diagram illustrates an embodiment of the GIS device 1 and power system of this invention. The GIS device 1 includes a conductor 11 and an equalizing shield 12. One end of the conductor 11 is connected to the bushing 21 of the transformer 2. The equalizing shield 12 is detachably connected to one end of the conductor 11 and is circumferentially covered on the outside of the conductor 11. The equalizing shield 12 is used to shield the conductor 11 from discharge.

[0027] Specifically, the GIS device 1 is a compact switchgear that seals high-voltage electrical equipment (such as circuit breakers, disconnectors, grounding switches, current / voltage transformers, etc.) in a metal casing filled with insulating gas. As a "smart switch" for modern high-voltage power grids, one end of the GIS device 1 is connected to the transformer 2, and together with the transformer 2, they undertake the core functions of power conversion and protection.

[0028] The GIS equipment 1 includes a conductor 11 and an equalizing cover 12. The conductor 11 is a core component that integrates electrical performance, mechanical strength, thermal management, and insulation. One end of the conductor 11 is connected to the bushing 21 of the transformer 2. The bushing 21 of the transformer 2 refers to the high-voltage bushing 21 of the transformer 2.

[0029] The voltage equalization shield 12 has insulation and voltage equalization shielding functions, used for equalizing the electric field of the conductor 11 and shielding the conductor 11 from discharge; the voltage equalization shield 12 is located on the side where the conductor 11 is connected to the sleeve 21, and the voltage equalization shield 12 is detachably connected to the conductor 11, thereby facilitating the installation and removal of the voltage equalization shield 12 and the conductor 11, and the voltage equalization shield 12 and the conductor 11 do not interfere with each other, and the conductor 11 can also be used independently, thereby improving the compatibility of the conductor 11 and the voltage equalization shield 12; at the same time, The equalizing shield 12 is circumferentially arranged around the conductor 11 on the outside of the conductor 11, and the equalizing shield 12 extends upward from the bottom end of the conductor 11, so that the equalizing shield 12 covers the outside of the end of the conductor 11 near the sleeve 21. Therefore, the equalizing shield 12 shields the discharge of the end of the conductor 11 near the sleeve 21, thereby preventing the conductor 11 from discharging to the outer wall of the air chamber of the GIS equipment 1 at its connection with the sleeve 21, and avoiding affecting the operation of the GIS equipment 1.

[0030] This application adds a voltage equalization shield 12 to one end of the connection between the conductor 11 of the GIS equipment 1 and the bushing 21 of the transformer 2. The voltage equalization shield 12 is detachably connected to the conductor 11 and has insulation and voltage equalization shielding functions. When the conductor 11 discharges to the outer wall of the gas chamber of the GIS equipment 1, the voltage equalization shield 12 can provide voltage equalization shielding against high voltage field strength. This solves the problem of the conductor 11 discharging to the outer wall of the gas chamber on the high-voltage side during operation of the GIS equipment 1 and the transformer 2 under transient high voltage impact, thereby ensuring the normal operation of the GIS equipment 1 and the transformer 2.

[0031] In one embodiment, reference is made to Figures 1 to 3As shown, one end of the conductor 11 is provided with an outer edge 110, which extends outward along the circumference of the conductor 11. The top end of the outer edge 110 is detachably connected to the equalizing cover 12. Specifically, the conductor 11 is provided with an outer edge 110 at one end connected to the bushing 21. The top end of the outer edge 110 is used to connect the conductor 11 and the equalizing shield 12, and the bottom end of the outer edge 110 is connected to one end of the bushing 21. The outer edge 110 extends vertically outward from the conductor 11 along its circumference and is located at the edge of the conductor 11, that is, the outer edge 110 is located at the end of the conductor 11 near the transformer 2. The top end of the outer edge 110 is detachably connected to the equalizing shield 12. Therefore, the equalizing shield 12 extends upward from the top end of the outer edge 110 and surrounds the conductor 11, thereby equalizing and shielding the high voltage electric field at the end of the conductor 11 near the bushing 21 to prevent the end of the conductor 11 near the bushing 21 from discharging to the outer wall of the GIS equipment 1.

[0032] In this embodiment, by detachably mounting the equalizing shield 12 on the outer edge 110, the stability of the connection between the equalizing shield 12 and the conductor 11 is improved, preventing the equalizing shield 12 from detaching from the conductor 11. At the same time, the structural stability of the GIS equipment 1 is improved, and the installation of the equalizing shield 12 and the conductor 11 is simple and efficient.

[0033] In a specific embodiment, the outer edge 110 is a circular structure (not shown in the figure), and the diameter of the outer edge 110 is equal to the diameter of the sleeve 21. Specifically, the outer edge 110 extends circumferentially along the conductor 11. The conductor 11 is generally a circular structure, and the sleeve 21 is also generally a circular structure. Therefore, setting the outer edge 110 as a circular structure makes the structure of the outer edge 110 and the conductor 11 more stable and closely fitted. At the same time, the bottom end of the outer edge 110 is connected to the sleeve 21, thereby making the shapes of the sleeve 21 and the outer edge 110 fit together, facilitating the installation of the sleeve 21 and the outer edge 110, and improving the stability of the conductor 11, the outer edge 110, and the sleeve 21.

[0034] Furthermore, the diameter of the outer edge 110 is equal to the diameter of the sleeve 21, thereby ensuring that when the conductor 11 and the sleeve 21 are connected, the size of the outer edge 110 of the conductor 11 matches the size of the sleeve 21, that is, the edge of the outer edge 110 is tightly fitted to the wall of the sleeve 21, thereby avoiding the distortion of the electric field at the connection between the conductor 11 and the sleeve 21 under high voltage field strength, and further avoiding the phenomenon of the conductor 11 located at the top edge of the sleeve 21 discharging to the outer wall of the GIS equipment 1, thus ensuring the normal operation of the GIS equipment 1 and the transformer 2.

[0035] In one embodiment, reference is made to Figures 1 to 3 As shown, the GIS equipment 1 also includes a flexible connection component 13 and a shielding cover 14. The flexible connection component 13 is connected to the other end of the conductor 11, and the shielding cover 14 is placed over the flexible connection component 13 and slidably connected to the conductor 11 along the height direction of the conductor 11. Specifically, the GIS equipment 1 also includes a flexible connection component 13 and a shielding cover 14. The flexible connection component 13 is fixedly connected to the other end of the conductor 11, that is, the top end of the conductor 11 is fixedly connected to the flexible connection component 13, and the bottom end of the conductor 11 is fixedly connected to the sleeve 21. The flexible connection component 13 is a flexible device used for connecting the conductors 11 to each other or the conductors 11 to other components (such as circuit breakers, disconnect switches, etc.). It is usually made of highly conductive materials (such as silver-plated copper braided strips, corrugated pipes, or spring contacts). The core function of the flexible connection component 13 is to ensure reliable electrical connection while compensating for stress caused by mechanical displacement, thermal expansion and contraction, and vibration, ensuring long-term stable operation of the equipment.

[0036] The shield 14 is an important structural component in high-voltage equipment. The shield 14 is installed on the outside of the flexible connection assembly 13. The core function of the shield 14 is to optimize the electric field distribution, suppress partial discharge, protect the flexible connection assembly 13 from external interference, and improve the stability and safety of equipment operation. In order to improve the efficiency of the flexible connection assembly 13 during installation or maintenance, the shield 14 is slidably connected to the conductor 11, and the shield 14 can slide up and down along the height direction of the conductor 11.

[0037] When the GIS equipment 1 needs to be repaired and the flexible connection component 13 needs to be disassembled, the shielding cover 14 can be slid down to expose the flexible connection component 13, which facilitates the operation of the staff. When the GIS equipment 1 is to be run, the shielding cover 14 can be slid up until the shielding cover 14 completely covers the outside of the flexible connection component 13, so that the flexible connection component 13 is in a sealed state, thereby ensuring the normal operation of the flexible connection component 13.

[0038] In a specific embodiment, refer to Figures 1 to 2 As shown, the top end of the outer edge 110 includes a fixing portion 111 and a protrusion 112. The protrusion 112 is disposed near the conductor 11 and is used to limit the voltage equalization shield 12. The fixing portion 111 is disposed adjacent to the protrusion 112, and the fixing portion 111 is detachably connected to the voltage equalization shield 12. Specifically, the top end of the outer edge 110 is detachably connected to the voltage equalization shield 12. In this embodiment, the top end of the outer edge 110 includes a fixing portion 111 and a protrusion 112. The fixing portion 111 is used to fix the outer edge 110 and the voltage equalization shield 12; the protrusion 112 is used to limit the voltage equalization shield 12, preventing the voltage equalization shield 12 from approaching the conductor 11, thereby ensuring that the shield 14 has sufficient downward movement distance to ensure the installation and removal of the flexible connection assembly 13; The fixing part 111 is disposed adjacent to the protrusion 112, and the protrusion 112 is located on the outer edge 110 near the conductor 11, that is, the protrusion 112 is located inside the outer edge 110, and the fixing part 111 is located outside the outer edge 110. The upper surface of the protrusion 112 is higher than the upper surface of the fixing part 111. The fixing part 111 is detachably connected to the equalizing cover 12, so the equalizing cover 12 is fixed at the upper end of the fixing part 111.

[0039] Because the protrusion 112 limits the equalizing cover 12, a gap exists between the equalizing cover 12 and the outer surface of the conductor 11. When the GIS equipment 1 needs to inspect and disassemble the flexible connection assembly 13, the shield 14 is slid downwards, allowing it to slide within the gap. This prevents the shield 14 and the equalizing cover 12 from interfering with each other and affecting the downward movement of the shield 14. The shield 14 continues until its bottom end abuts against the top end of the protrusion 112, meaning it has completely slid down to the bottom of the conductor 11. At this point, the shield 14 completely avoids the flexible connection assembly 13, exposing it. This allows workers to directly disassemble and reassemble the flexible connection assembly 13 according to the normal process sequence, facilitating the installation and removal of the flexible connection and improving maintenance efficiency.

[0040] In one embodiment, the width of the protrusion 112 is equal to the thickness of the shield 14 (not shown in the figure). Specifically, the protrusion 112 is used to limit the equalizing shield 12 so that there is a certain gap between the equalizing shield 12 and the outer surface of the conductor 11. The gap is used to ensure that the shield 14 can slide up and down along the height direction of the conductor 11. The width of the gap refers to the width of the protrusion 112. Therefore, in this embodiment, the width of the protrusion 112 is equal to the thickness of the shield 14, thereby ensuring that the shield 14 can slide smoothly up and down between the conductor 11 and the equalizing shield 12. The shield 14 has a sufficient sliding distance so that it can fall to the bottom of the conductor 11, which facilitates the installation and removal of the flexible connection assembly 13 by the operator. At the same time, it can also minimize the gap between the equalizing shield 12 and the conductor 11, improve the equalizing shielding effect of the equalizing shield 12 on the electric field, and reduce the size of the GIS equipment 1 and the area occupied by the GIS equipment 1.

[0041] More specifically, the width of the fixing part 111 is equal to the width of the bottom end of the equalizing cover 12, so that the bottom edge of the equalizing cover 12 is flush with the edge of the fixing part 111, thereby ensuring that the diameter of the conductor 11 and the equalizing cover 12 is consistent with the diameter of the sleeve 21, and improving the structural stability of the GIS equipment 1.

[0042] In a specific embodiment, refer to Figures 1 to 3 As shown, the inner side of the pressure equalization cover 12 facing the protrusion 112 has a planar structure, and the inner side is in close contact with one side of the protrusion 112. Specifically, the side of the equalizing cover 12 facing the protrusion 112 is the inner surface of the equalizing cover 12. The inner surface is planar and is tightly fitted to the side of the protrusion 112, thereby ensuring the limiting effect of the protrusion 112 on the equalizing cover 12. When the equalizing cover 12 is fixed to the fixing part 111, the equalizing cover 12 can be adjacent to the protrusion 112, avoiding the inner surface of the equalizing cover 12 from protruding outward from the side of the protrusion 112, so as to avoid the equalizing cover 12 and the shielding cover 14 from interfering with each other and ensuring the normal sliding of the shielding cover 14. At the same time, the equalizing cover 12 is set close to the protrusion 112, so that the structure of the conductor 11 and the equalizing cover 12 is more compact, improving the integration of the GIS equipment 1 and reducing the size of the GIS equipment 1.

[0043] In one embodiment, reference is made to Figures 1 to 3As shown, the outer surface of the voltage equalization shield 12 has an arc-shaped structure. The outer surface extends upward from one end fixed to the outer edge 110 and gradually narrows towards the conductor 11. Specifically, the outer surface of the voltage equalization shield 12 refers to the side of the voltage equalization shield 12 away from the conductor 11, and the outer surface has an arc-shaped structure. The outer surface extends upward from one end fixed to the outer edge 110, and the outer surface gradually extends obliquely towards the conductor 11, that is, the outer surface gradually narrows from its bottom end upward towards the conductor 11, thereby making the structure of the voltage equalization shield 12 more stable and improving the shielding performance of the voltage equalization shield 12 against discharge to the conductor 11.

[0044] In a specific embodiment, refer to Figures 1 to 3 As shown, the equalizing cover 12 and the outer edge 110 are fastened together by screws 15. Specifically, the equalizing cover 12 and the outer edge 110 are detachably connected. In this embodiment, the equalizing cover 12 and the outer edge 110 are fastened together by screws 15. The fastening method is simple and convenient for workers to assemble and disassemble the conductor 11 and the equalizing cover 12.

[0045] More specifically, the bottom end of the pressure equalization cover 12 is provided with a threaded hole, and the outer edge 110 is provided with a through hole that passes through its upper and lower ends. The through hole and the threaded hole are respectively provided. One end of the screw 15 is passed through the through hole and the threaded hole from below the outer edge 110 and locked in place. The fixing method is simple.

[0046] More specifically, multiple threaded holes and multiple through holes are provided, with the multiple threaded holes spaced apart circumferentially along the equalizing cover 12, and the multiple through holes spaced apart circumferentially along the outer edge 110, and the multiple through holes correspond one-to-one with the multiple threaded holes, thereby improving the fixation of the conductor 11 and the equalizing cover 12.

[0047] This application also provides a power system (not shown in the figure), which includes a GIS device 1. The GIS device 1 is any of the GIS devices described above. Since the GIS device 1 has been described in detail in the above embodiments, it will not be described again here.

[0048] The power system described in this application, by employing the GIS equipment 1, shields the electric field at the connection point between the conductor 11 of the GIS equipment 1 and the bushing 21 of the transformer 2 by the equalization shield 12, thereby ensuring the normal operation of the GIS equipment 1 and improving its service life, thereby improving the stability of the power system operation and extending the service life of the power system.

[0049] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A GIS apparatus, characterized by, The application relates to a GIS device. The conductor is provided with an outer edge extending along the circumference of the conductor towards the outside of the conductor, and the top end of the outer edge is detachably connected with the equalizing cover. The outer edge is in a circular structure, and the diameter of the outer edge is equal to the diameter of the bushing.

2. The GIS apparatus of claim 1, wherein, The GIS device further comprises a soft connection assembly connected with the other end of the conductor, and a shielding cover which is arranged outside the soft connection assembly and is slidably connected with the conductor along the height direction of the conductor.

3. The GIS apparatus of claim 2, wherein, The top end of the outer edge comprises a fixing part and a protruding part, the protruding part is arranged close to the conductor and is used for limiting the equalizing cover, and the fixing part is arranged adjacent to the protruding part and is detachably connected with the equalizing cover.

4. The GIS apparatus of claim 2, wherein, The width of the protruding part is equal to the thickness of the shielding cover.

5. The GIS apparatus of claim 4, wherein, The inner side of the equalizing cover towards the protruding part is in a plane structure and is tightly combined with one side of the protruding part.

6. The GIS apparatus of claim 5, wherein, The outer surface of the equalizing cover is in an arc structure, the outer surface extends upwards from one end fixed with the outer edge and gradually narrows towards the direction close to the conductor.

7. The GIS apparatus of claim 5, wherein, The equalizing cover and the outer edge are fixed by screw locking.

8. The GIS apparatus of claim 2, wherein, The application relates to a GIS device.

9. The GIS apparatus of claim 2, wherein, The GIS device is the GIS device as claimed in any one of claims 1-9.

10. A power system characterized by, ​ ​

Images