Electromechanical combined test device for discharge defect of GIS (Gas Insulated Switchgear) equipment

Abstract

According to the GIS equipment discharge defect electromechanical combined test device, a basin-type insulator is transversely arranged in a GIS shell, a high-voltage guide rod is installed on the basin-type insulator and longitudinally extends in the GIS shell, a defect connecting piece is arranged on the high-voltage guide rod in a sleeving mode, and the defect connecting piece is connected with the basin-type insulator. The defect connecting piece comprises a plurality of grooves which are formed in the inner wall and extend in the circumferential direction and wide-distance screw holes formed in the outer wall, metal springs are installed in the grooves and conductively connected with the high-voltage guide rod and the defect connecting piece, loose bolts are adjustably connected with the wide-distance screw holes, and insulating screw rods are fixedly connected with the defect connecting piece. The L-shaped electrode needle comprises a first section vertically connected with the insulating screw rod and a second section vertically extending from the tail end of the first section, and the second section is arranged in parallel relative to the insulating screw rod.

Description

Technical Field

[0001] The utility model relates to the technical field of GIS equipment discharge defects, in particular to an electromechanical joint test device for GIS equipment discharge defects. Background Art

[0002] Insulation defects inside gas-insulated switchgear (GIS) equipment are one of the important causes of insulation failure. Insulation defects will gradually cause partial discharge and even eventually lead to insulation failure under the action of voltage, which seriously endangers the safe operation of GIS equipment. Conventional voltage tests can effectively detect most insulation defects caused by equipment leaving the factory and during transportation. However, voltage tests on GIS equipment cannot fully reflect the degradation level of its insulation system: on the one hand, due to the vibration of GIS equipment under load operation, some insulation defects under this working condition will more seriously endanger the safe operation of the equipment; on the other hand, long-term load vibration will cause some defect types to further develop, thus causing more serious safety hazards. Therefore, when carrying out insulation tests on GIS equipment, it is necessary to consider the impact of long-term vibration on the insulation performance of the equipment.

[0003] The defect settings of existing GIS partial discharge tests mainly focus on the discharge characteristics under voltage, while less attention is paid to the discharge defect settings and discharge characteristics of the equipment under load conditions.

[0004] The information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore may contain information that does not form the prior art that is known to a person of ordinary skill in the art. Utility Model Content

[0005] In view of the shortcomings or defects of the above-mentioned prior art, a GIS equipment discharge defect combined electromechanical test device is provided. The defect setting of the insulation test of GIS equipment under electromechanical action covers the possible insulation defect types in actual operation and comprehensively considers the possible impact of the defects on the equipment under load conditions, providing technical support for the insulation status test of GIS equipment under the combined electromechanical action.

[0006] The purpose of the utility model is achieved through the following technical solutions.

[0007] A GIS equipment discharge defect electromechanical joint test device includes:

[0008] GIS shell,

[0009] The pot-type insulator is arranged transversely in the GIS housing.

[0010] A high voltage guide rod is mounted on the pot insulator and extends longitudinally in the GIS housing.

[0011] The defective connector is sleeved on the high-voltage guide rod, and the defective connector includes a plurality of circumferentially extending grooves arranged on the inner wall and wide-spaced screw holes arranged on the outer wall.

[0012] a metal spring, which is installed in the groove and electrically connects the high-voltage guide rod and the defective connection piece,

[0013] Loosen the bolts that are adjustable to connect the wide-spaced screw holes,

[0014] an insulating screw, which is fixedly connected to the defective connection piece,

[0015] The L-shaped electrode needle comprises a first section vertically connected to an insulating screw and a second section vertically extending from the end of the first section, wherein the second section is arranged parallel to the insulating screw.

[0016] In the electromechanical joint test device for discharge defects of GIS equipment, the outer surface of the loose bolt is flush with the outer wall of the defective connecting part.

[0017] In the electromechanical joint test device for GIS equipment discharge defects, the loose bolts contact with the defective connecting parts under the action of gravity to form an equipotential.

[0018] In the electromechanical joint test device for discharge defects of GIS equipment, the loose bolt is disconnected from the wide-pitch screw hole during the starting process and a gap is formed.

[0019] In the electromechanical joint test device for discharge defects of GIS equipment, the defective connector has a connector housing that is coaxial with the high-voltage guide rod.

[0020] In the electromechanical joint test device for GIS equipment discharge defects, the connector housing is an annular sleeve structure.

[0021] In the electromechanical joint test device for GIS equipment discharge defects, the high-voltage guide rod extends along the central axis of the GIS housing.

[0022] In the electromechanical joint test device for GIS equipment discharge defects, the pot-type insulator is fixedly installed in the GIS housing via a bracket.

[0023] In the electromechanical joint test device for discharge defects of GIS equipment, the first section of the L-shaped electrode needle is fixed to the insulating screw by a thread.

[0024] In the electromechanical joint test device for discharge defects of GIS equipment, the second section is opposite to the defective connecting piece to form a suspension gap.

[0025] Compared with the prior art, the beneficial effects brought by the utility model are:

[0026] The utility model of the GIS equipment discharge defect electromechanical joint test device more comprehensively considers the types of defects that may occur in the equipment during actual operation and the impact of the equipment on the development of defects when running under load during the GIS test, thereby improving the comprehensiveness and accuracy of the test.

[0027] The above description is only an overview of the technical solution of the utility model. In order to make the technical means of the utility model clearer and to achieve the extent that those skilled in the art can implement it according to the contents of the specification, and in order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are illustrated below. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] By reading the detailed description of the preferred specific embodiments below, various other advantages and benefits of the utility model will become clear to those of ordinary skill in the art. The drawings in the specification are only used for the purpose of illustrating the preferred embodiments and are not considered to be limitations of the utility model. Obviously, the drawings described below are only some embodiments of the utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative work. Moreover, the same reference numerals are used to represent the same components throughout the drawings.

[0029] In the attached picture:

[0030] Figure 1 A schematic diagram of the structure of a GIS equipment discharge defect electromechanical joint test device provided by one embodiment of the utility model;

[0031] Figure 2 A schematic diagram of a defective connection part of an electromechanical joint test device for discharge defects of GIS equipment provided by an embodiment of the utility model.

[0032] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0033] The following will refer to the attached Figure 1 to Figure 2 Specific embodiments of the present invention are described in more detail. Although specific embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0034] It should be noted that certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that technicians may use different nouns to refer to the same component. This specification and claims do not use the difference in nouns as a way to distinguish components, but use the difference in the functions of the components as the criterion for distinction. As mentioned throughout the specification and claims, "including" or "comprising" is an open term, so it should be interpreted as "including but not limited to". The subsequent description of the specification is a preferred embodiment of the implementation of the utility model, but the description is based on the general principles of the specification and is not used to limit the scope of the utility model. The scope of protection of the utility model shall be determined by the definition of the attached claims.

[0035] To facilitate the understanding of the embodiments of the present utility model, several specific embodiments will be further explained below with reference to the accompanying drawings, and each of the accompanying drawings does not constitute a limitation on the embodiments of the present utility model.

[0036] For a better understanding, Figure 1 to Figure 2 As shown, a GIS equipment discharge defect electromechanical joint test device includes:

[0037] GIS Shell 7,

[0038] The pot insulator 9 is arranged transversely in the GIS housing 7.

[0039] The high voltage guide rod 4 is mounted on the pot insulator 9 and extends longitudinally in the GIS housing 7.

[0040] The defective connector 1 is sleeved on the high-voltage guide rod 4, and the defective connector 1 includes a plurality of circumferentially extending grooves 12 arranged on the inner wall and wide-spaced screw holes 2 arranged on the outer wall.

[0041] The metal spring 11 is installed in the groove 12 and electrically connects the high-voltage guide rod 4 and the defective connecting piece 1.

[0042] Loosen the bolt 3, which is adjustable to connect the wide-pitch screw hole 2,

[0043] The insulating screw 5 is fixedly connected to the defective connecting piece 1.

[0044] The L-shaped electrode needle 6 includes a first section vertically connected to the insulating screw 5 and a second section vertically extending from the end of the first section, wherein the second section is arranged parallel to the insulating screw 5 .

[0045] In a preferred embodiment of the electromechanical joint test device for discharge defects of GIS equipment, the outer surface of the loose bolt 3 is flush with the outer wall of the defective connecting piece 1.

[0046] In the preferred embodiment of the electromechanical joint test device for GIS equipment discharge defects, the loose bolt 3 contacts the defective connecting piece 1 under the action of gravity to form an equipotential.

[0047] In a preferred embodiment of the electromechanical joint test device for discharge defects of GIS equipment, the loosening bolt 3 is disconnected from the wide-pitch screw hole 2 during the starting process and a gap is formed.

[0048] In a preferred embodiment of the electromechanical joint test device for GIS equipment discharge defects, the defective connector 1 has a connector housing 10 that is coaxial with the high-voltage guide rod 4 .

[0049] In a preferred embodiment of the electromechanical joint test device for GIS equipment discharge defects, the connector housing 10 is an annular sleeve structure.

[0050] In a preferred embodiment of the electromechanical joint test device for GIS equipment discharge defects, the high-voltage guide rod 4 extends along the central axis of the GIS housing 7 .

[0051] In a preferred embodiment of the electromechanical joint test device for GIS equipment discharge defects, the pot-type insulator 9 is fixedly installed in the GIS housing 7 via a bracket.

[0052] In a preferred embodiment of the electromechanical joint test device for discharge defects of GIS equipment, the first section of the L-shaped electrode needle 6 is fixed to the insulating screw 5 by threads.

[0053] In the preferred embodiment of the electromechanical joint test device for discharge defects of GIS equipment, the second section is opposite to the defective connecting piece 1 to form a suspension gap.

[0054] In one embodiment, the electromechanical joint test device for discharge defects of GIS equipment involves three internal defects: loose bolt defects, suspended metal particle defects, and internal metal foreign matter defects, and proposes a defective connector for achieving electrical connection between the defective main structure and the high-voltage guide rod.

[0055] In the case of a loose bolt defect, a loose bolt 3 is installed in the wide-pitch screw hole 2 on the defective connector 1, and the bolt is adjusted to be loose, and the bolt is adjusted until the outer surface is flush with the outer shell of the defective connector 1. When a voltage is applied to the high-voltage guide rod 4, the loose bolt 3 will contact the defective connector 1 under the action of gravity to form an equipotential; when a current is applied to the high-voltage guide rod 4 and vibration is induced, the loose bolt 3 will be disconnected from the wide-pitch screw hole 2 on the defective connector 1 during the starting process and a short gap will be formed. When the applied voltage is sufficient, the short gap will be broken down, thereby causing discharge.

[0056] In the suspended metal particle defect, the insulating screw 5 is fastened to the defective connector 1 by a thread, one end of the L-shaped electrode needle 6 is fixed to the insulating screw 5 by a thread, and the other end is opposite to the defective connector 1, forming a suspension gap. When the high-voltage guide rod 4 applies voltage, it will divide the voltage according to the stray capacitance formed between the defective connector 1-L-shaped electrode needle 6-GIS shell 7, and finally break down the air gap between the defective connector 1-L-shaped electrode needle 6, causing suspended discharge; when the high-voltage guide rod 4 applies current and causes vibration, the insulating screw 5 will be periodically displaced under the action of the vibration of the high-voltage guide rod 4, thereby affecting the voltage distribution between the defective connector 1-L-shaped electrode needle 6-GIS shell 7, thereby further changing the discharge characteristics of the suspended metal particles. In one embodiment, the insulating screw 5 is made of nylon, because the discharge caused by the L-shaped electrode needle 6 increases in dispersion as the vibration of the high-voltage guide rod 4 increases.

[0057] Among the internal metal foreign body defects, metal foreign bodies 8 containing metal material particles such as metal debris and metal gaskets are placed on the GIS shell 7. When the high-voltage conductor 4 applies the power frequency voltage, the metal foreign body 8 defect will be charged and jump under the action of electrostatic induction. When it contacts the high-voltage conductor 4 and the GIS shell 7, charge exchange occurs and reciprocates between the conductors. When the high-voltage conductor 4 passes current and causes vibration, the vibration of the GIS shell 7 will periodically trigger the jumping of the metal foreign body 8. At this time, since the metal foreign body carries induced charges, it will start to reciprocate under the action of a lower starting voltage. During the arrangement of the metal foreign body 8 defect, it should be located directly below the defective connector 1 and away from the pot-type insulator 9 inside the equipment to avoid causing surface discharge of the equipment.

[0058] The main structure of the defective connector 1 includes a connector housing 10 and a metal spring 11. A groove 12 for installing the connector spring is provided inside the connector housing 10. The connector housing 10 is an annular sleeve structure coaxial with the high-voltage guide rod 4, and the inner diameter is slightly larger than the high-voltage guide rod 4. The metal spring 11 is a compressible conductor spring used to electrically connect the high-voltage guide rod 4 to the connector housing 10. During the installation process, a pre-tightening force is fully applied to it and it is compressed so that the high-voltage guide rod 4 and the connector housing 10 are reliably in contact. The connector housing 10 is provided with a wide-moment screw hole 2 for connecting a typical defective structure, which is used to install the defective main structure.

[0059] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0060] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A GIS equipment discharge defect electromechanical joint test device, characterized in that: These include, GIS shell, The pot-type insulator is arranged transversely in the GIS housing. A high voltage guide rod is mounted on the pot insulator and extends longitudinally in the GIS housing. The defective connector is sleeved on the high-voltage guide rod, and the defective connector includes a plurality of circumferentially extending grooves arranged on the inner wall and wide-spaced screw holes arranged on the outer wall. a metal spring, which is installed in the groove and electrically connects the high-voltage guide rod and the defective connection piece, Loosen the bolts that are adjustable to connect the wide-spaced screw holes, an insulating screw, which is fixedly connected to the defective connection piece, The L-shaped electrode needle comprises a first section vertically connected to an insulating screw and a second section vertically extending from the end of the first section, wherein the second section is arranged parallel to the insulating screw.

2. The electromechanical joint test device for GIS equipment discharge defects as claimed in claim 1 is characterized in that: The outer surface of the loose bolt is flush with the outer wall of the defective connecting piece.

3. The electromechanical joint test device for GIS equipment discharge defects as claimed in claim 2 is characterized in that: Under the action of gravity, the loose bolts come into contact with the defective connecting parts to form an equipotential.

4. The electromechanical joint test device for GIS equipment discharge defects as claimed in claim 1 is characterized in that: The loose bolt is disconnected from the wide-pitch screw hole during the jump-off process and a gap is formed.

5. The electromechanical joint test device for GIS equipment discharge defects as claimed in claim 1 is characterized in that: The defective connecting piece has a connecting piece housing coaxial with the high-voltage guide rod.

6. The electromechanical joint test device for GIS equipment discharge defects as claimed in claim 5 is characterized in that: The outer shell of the connecting piece is an annular sleeve structure.

7. The electromechanical joint test device for GIS equipment discharge defects as claimed in claim 1 is characterized in that: The high-voltage guide rod extends along the central axis of the GIS housing.

8. The electromechanical joint test device for GIS equipment discharge defects as claimed in claim 1 is characterized in that: The pot-type insulator is fixedly installed in the GIS housing via a bracket.

9. The electromechanical joint test device for GIS equipment discharge defects as claimed in claim 1 is characterized in that: The first section of the L-shaped electrode needle is fixed to the insulating screw by threads.

10. The electromechanical joint test device for GIS equipment discharge defects as claimed in claim 9, characterized in that: The second section is opposite to the defective connection piece to form a suspension gap.

Images