A GIS partial discharge simulation verification device

Abstract

The present invention relates to the technical field of GIS equipment simulation detection, and proposes a GIS partial discharge simulation verification device, comprising a housing, a distance adjustment mechanism, a connection component, a switching mechanism and a simulation unit, wherein an insulating air cavity is arranged in the housing; the distance adjustment mechanism is arranged on the housing, and the distance adjustment mechanism comprises a movable part, and the movable part is located in the insulating air cavity and can move in a straight line in the insulating air cavity; the connection component comprises a conductive part and an insulating member, and the conductive part is arranged on the movable part, and the insulating member is fixed on the outer side of the movable part. The GIS partial discharge simulation verification device adjusts the position of the simulation unit in the insulating air cavity through the distance adjustment mechanism to simulate partial discharge defects at different positions on the GIS equipment, thereby improving the accuracy of the simulation test, and does not require manual plug-in connection, which can simplify the test process, thereby reducing the manpower and time required for the test. In addition, compared with the prior art, the space occupied by the equipment and the installation cost can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of GIS equipment simulation detection, and in particular to a GIS partial discharge simulation verification device. Background Art

[0002] Gas insulated switchgear is abbreviated as GIS. Since its practical application in the 1960s, GIS equipment has been widely used all over the world. GIS is not only widely used in high voltage and ultra-high voltage fields, but also in ultra-high voltage fields. Compared with conventional open substations, the advantages of GIS are compact structure, small footprint, high reliability, flexible configuration, convenient installation, strong safety, and strong environmental adaptability. Since GIS is a closed device, the test means are limited, and the maintenance cycle is long, it is difficult to find its internal defects according to traditional preventive tests or routine tests, or insulation accidents will occur during the test cycle, causing huge losses and impacts. In recent years, the live detection technology of power equipment has developed rapidly. For high-voltage switchgear, due to the influence of factors such as equipment quality defects and aging after long-term operation, various defects will occur in the long-term operation of GIS. These defects will cause partial discharge. The live detection technology can detect these partial discharge signals that may cause insulation accidents in advance, which is conducive to the early detection of latent defects of GIS equipment.

[0003] For example, the GIS partial discharge live detection test device based on defect simulation with publication number CN105223478A, which connects a conductor to an electrode of multiple defect simulation components, inserts one of the defect simulation components and restores the other defect simulation components to their initial positions when performing partial discharge defect simulation, and then performs a local defect discharge simulation test through the selected defect simulation component.

[0004] Although the above scheme can be used for GIS partial discharge testing, it requires manual twisting of the screw to push the defect simulation component for insertion and removal, and then switching among the various simulated defect components. In each operation, the corresponding component needs to be inserted and removed, resulting in a low degree of test automation, and the time and labor costs during the test are also correspondingly large. At the same time, since the positions of the various defect simulation components are relatively fixed and are connected by plugging and unplugging the defect simulation components, it is impossible to simulate partial discharge defects at different positions on the GIS equipment, affecting the accuracy of the simulation test. Summary of the invention

[0005] In view of this, the present invention proposes a GIS partial discharge simulation verification device, which adjusts the position of the simulation unit in the insulating air cavity by setting a distance adjustment mechanism to simulate partial discharge defects at different positions of the GIS equipment and improve the accuracy of the simulation test. At the same time, a switching mechanism is set. After the position adjustment is completed, it is switched to the simulation unit corresponding to the required simulation defect by rotation to simulate the required GIS partial discharge defect. There is no need for manual plugging and unplugging, which can simplify the test process and reduce the manpower and time required for the test.

[0006] The technical solution of the present invention is implemented as follows: The present invention provides a GIS partial discharge simulation verification device, including a housing, a distance adjustment mechanism, a connection component, a switching mechanism and a simulation unit, wherein:

[0007] An insulating air cavity is provided in the housing;

[0008] The distance adjustment mechanism is arranged on the housing, and the distance adjustment mechanism comprises a movable part, and the movable part is located in the insulating air cavity and can move along a straight line in the insulating air cavity;

[0009] The connecting assembly comprises a conductive part and an insulating part, wherein the conductive part is arranged on the movable part and the insulating part is fixed on the outer side of the movable part;

[0010] The switching mechanism comprises a wheel disc, which is movably arranged on the insulating member and can rotate relative to the insulating member, and the wheel disc is provided with a plurality of mounting positions distributed along the rotation direction thereof;

[0011] There are multiple simulation units, which are respectively fixed on various mounting positions of the wheel. The simulation units are used to simulate GIS local discharge defects. The wheel rotates to change the relative positions of each simulation unit and the conductive part, and selectively makes one of the multiple simulation units electrically connected to the conductive part to form a defect simulation loop. The distance adjustment mechanism is used to drive the simulation unit and the conductive part to move synchronously to adjust the position of the defect simulation loop in the insulating air cavity.

[0012] On the basis of the above technical solution, preferably, the pitch adjustment mechanism further includes a first conductive rod and a pitch adjustment motor, wherein:

[0013] The first conductive rod is disposed in the insulating air cavity and is threadedly connected to the movable part, and the first conductive rod is electrically connected to the conductive part through the movable part;

[0014] The pitch-adjustable motor is fixed on the housing, and the output end is transmission-connected with the first conductive rod so as to drive the movable part to move along a straight line in the insulating air cavity through the thread.

[0015] On the basis of the above technical solution, preferably, a conductive groove is provided on a side of the simulation unit away from the wheel disc, and the conductive groove is used for inserting the conductive part so as to electrically connect the simulation unit to the conductive part.

[0016] Further preferably, the connection assembly further includes a base and an elastic member, wherein:

[0017] The base is fixed on the movable part, the conductive part is arranged in the base, and one end of the conductive part extends to the outside of the base;

[0018] The elastic member is arranged in the base, and one end of the elastic member is fixed to the movable part. The elastic member is used to push the conductive part to be inserted into the conductive slot of the simulation unit.

[0019] On the basis of the above technical solution, preferably, the connection assembly further comprises two shielding plates, both of which are fixed on the insulating member and are respectively located on both sides of the axial direction of the wheel disc.

[0020] On the basis of the above technical solution, preferably, the switching mechanism further includes a second conductive rod and a switching motor, wherein:

[0021] The second conductive rod is rotatably arranged in the insulating air cavity, and the wheel disc is slidably arranged on the second conductive rod and can rotate along with the second conductive rod;

[0022] The switching motor is fixed on the housing, and the output end is transmission-connected with the second conductive rod.

[0023] Further preferably, the wheel disc is provided with multi-faceted holes, the second conductive rod passes through the wheel disc through the multi-faceted holes, the second conductive rod is arranged in a multi-faceted column shape and is adapted to the multi-faceted holes, so that the second conductive rod can drive the wheel disc to rotate.

[0024] On the basis of the above technical solution, preferably, a plurality of mounting grooves are opened on the wheel disc, the number of the mounting grooves is the same as the number of mounting positions, and the mounting grooves are respectively arranged on each mounting position, one end of the simulation unit is inserted into the mounting groove, and is threadedly connected to the wheel disc through the mounting groove.

[0025] On the basis of the above technical solution, preferably, the shell includes a simulation section and a maintenance section, the simulation section and the maintenance section are relatively fixed, the simulation section is used for GIS partial discharge simulation, and when the simulation unit is displaced to the maintenance section through the distance adjustment mechanism, it can be replaced through the maintenance section.

[0026] On the basis of the above technical solution, preferably, it also includes a sealing isolator, which is fixed in the shell and is used to divide the inner cavity of the shell into multiple insulating air cavities, and the distance adjustment mechanism, connecting assembly, switching mechanism and simulation unit are all arranged in the same insulating air cavity.

[0027] The GIS partial discharge simulation verification device of the present invention has the following beneficial effects compared with the prior art:

[0028] (1) The position of the simulation unit in the insulating air cavity is adjusted by setting a distance adjustment mechanism to simulate the local discharge defects at different positions on the GIS equipment, thereby improving the accuracy of the simulation test. At the same time, a switching mechanism is set. After the position adjustment is completed, the simulation unit corresponding to the desired simulation defect is switched by rotation to simulate the desired GIS local discharge defect. There is no need for manual plugging and unplugging, which can simplify the test process and reduce the manpower and time required for the test. At the same time, compared with the existing technology, it can reduce the space occupied by the equipment and the installation cost;

[0029] (2) A conductive slot is provided on the simulation unit for the conductive part to be inserted into, so that the simulation unit is electrically connected to the conductive part. The end of the conductive part is in a semi-spherical shape, the conductive slot is adapted to the conductive part, and the slot of the conductive slot is in an arc-shaped chamfered shape. When the wheel of the switching mechanism rotates, the conductive part can be removed from the conductive slot on the current simulation unit and inserted into the conductive slot of the next simulation unit. Since the conductive slot is adapted to the conductive part, it has a large contact area, thereby ensuring that no significant obstruction is caused to the flow of current;

[0030] (3) By providing two shielding plates and providing a clearance groove on the side of the shielding plate facing the conductive part, when one of the simulation units is connected to the conductive part for simulation operation, the strong electricity generated can be prevented from affecting other simulation units. At the same time, the clearance groove can prevent the shielding plate from hindering the discharge simulation action of the simulation unit.

[0031] (4) By providing a mounting groove on the wheel disc, the outer portion of the electrode of the simulation unit facing one end of the wheel disc can be screwed into the mounting groove through a thread and electrically connected to the wheel disc. At the same time, since the simulation unit is a consumable part, it needs to be replaced every 2-6 months during use. This arrangement can also facilitate the subsequent replacement of the simulation unit;

[0032] (5) By setting a sealing isolation piece, the inner cavity of the shell is divided into multiple insulating air cavities, and the distance adjustment mechanism, connecting assembly, switching mechanism and simulation unit are all set in the same insulating air cavity. When the simulation unit is replaced, the insulating air cavity where the simulation unit is installed needs to be refilled, and the cost of SF6 gas is relatively high. In order to reduce the loss of SF6 gas when replacing the simulation unit, the distance adjustment mechanism, connecting assembly, switching mechanism and simulation unit are separately isolated into an insulating air cavity, so as to avoid the need to refill the entire device with SF6 gas after replacing the simulation unit, thereby reducing the replacement cost of the simulation unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a side view of the GIS partial discharge simulation verification device of the present invention;

[0035] Figure 2 It is a schematic diagram of the internal structure of the GIS partial discharge simulation verification equipment of the present invention;

[0036] Figure 3 It is a schematic diagram of the structure of the connection components of the GIS partial discharge simulation verification device of the present invention;

[0037] Figure 4 It is a partial sectional side view of the connection assembly of the GIS partial discharge simulation verification device of the present invention;

[0038] Figure 5 for Figure 4 A schematic diagram of the structure enlargement at point A;

[0039] Figure 6 It is a schematic diagram of the wheel structure of the GIS partial discharge simulation verification equipment of the present invention. DETAILED DESCRIPTION

[0040] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0041] like Figure 1-2 As shown, the GIS partial discharge simulation verification device of the present invention includes a housing 1, a distance adjustment mechanism 2, a connecting component 3, a switching mechanism 4 and a simulation unit 5.

[0042] An insulating air cavity is arranged in the shell 1. In order to ensure that it has good insulation performance, the insulating air cavity is filled with SF6 insulating gas of a certain pressure. The shell 1 is the main component of the device, and other devices are arranged on the shell 1. Specifically, the shell 1 includes a base and a tank body installed on the base. The tank body is a column structure and has two parallel branches on the outside. It should be noted that the device also includes devices such as a high-voltage transformer and a coupling capacitor. The high-voltage transformer and other devices are arranged on the column of the tank body, and the coupling capacitor is arranged in one of the two branches of the tank body. The high-voltage transformer and the coupling capacitor are used to provide high voltage and collect partial discharge signals respectively to cooperate in completing the simulation test. The specific parameters of the high-voltage transformer can be selected as an input low voltage of 380V, an output low voltage of 150kV, and a rated capacity of 15kVA. The coupling capacitor can be selected as a rated low voltage of 150kV and a rated capacitance of 150pf.

[0043] A high-voltage coupling bushing for coupling external interference signals is also provided on the shell 1. The high-voltage coupling bushing is specifically arranged on the top of the column of the shell 1 tank body. The external interference signal is transmitted to the inside of the shell 1 through the terminal block of the high-voltage coupling bushing, and then coupled with the external interference signal, which can simulate the actual operating environment of the substation, and is of great significance for simulating the partial discharge detection of on-site GIS equipment.

[0044] The distance adjusting mechanism 2 is arranged on the shell 1, and the distance adjusting mechanism 2 includes a movable part 21. The movable part 21 is located in the insulating air cavity and can move in a straight line in the insulating air cavity. The distance adjusting mechanism 2 is specifically arranged in another branch of the shell 1 tank, and the coupling capacitor is located in the two branches respectively. The distance adjusting mechanism 2 is arranged to push the movable part 21 to make the movable part 21 move in a straight line in the shell 1, thereby changing its position, thereby simulating local discharge defects at different positions on the GIS equipment.

[0045] like Figure 4-5 As shown, the connecting component 3 includes a conductive part 31 and an insulating part 32, wherein the conductive part 31 is arranged on the movable part 21, and the insulating part 32 is fixed on the outer side of the movable part 21. Accordingly, the connecting component 3 and the distance adjustment mechanism 2 are arranged in the same insulating air cavity. The connecting component 3 is arranged on the movable part 21 to connect the distance adjustment mechanism 2 with the switching mechanism 4, so that the distance adjustment mechanism 2 can drive the simulation unit 5 to move through the connecting component 3.

[0046] The switching mechanism 4 includes a wheel disc 41, which is movably arranged on the insulating member 32 and can rotate relative to the insulating member 32. The wheel disc 41 is provided with a plurality of mounting positions distributed along its rotation direction. The wheel disc 41 can be driven by the movable part 21 of the distance adjustment mechanism 2 to move linearly through the insulating member 32, thereby realizing position adjustment. Correspondingly, the wheel disc 41 can also rotate about the center of a circle under the action of the switching mechanism 4. When the wheel disc 41 rotates, the local discharge defect of the GIS to be simulated is replaced by switching the mounting position corresponding to the conductive part 31.

[0047] In addition, there are two insulating parts 32, which are respectively located on both sides of the wheel disc 41. The insulating parts 32 are insulating plate-shaped components. The wheel disc 41 is connected to the insulating parts 32 through a bearing. Openings are provided on the two insulating parts 32. The two openings are respectively located on both sides of the connection between the simulation unit 5 and the conductive part 31 to avoid damage to the insulating parts 32 during the test.

[0048] like Figure 3 As shown, there are multiple simulation units 5, which are respectively fixed on each mounting position of the wheel 41. The simulation units 5 are used to simulate GIS local discharge defects. The wheel 41 rotates to change the relative positions of each simulation unit 5 and the conductive part 31, and selectively makes one of the multiple simulation units 5 electrically connected to the conductive part 31 to form a defect simulation loop. The distance adjustment mechanism 2 is used to drive the simulation unit 5 and the conductive part 31 to move synchronously to adjust the position of the defect simulation loop in the insulating air cavity.

[0049] Specifically, each simulation unit 5 can simulate the discharge types such as tip, suspension, air gap, particle, and surface of the GIS equipment, and then simulate various typical discharge waveforms. In the present embodiment, the number of simulation units 5 is set to seven. Accordingly, seven mounting positions are set on the wheel disc 41. The seven simulation units 5 are respectively fixed on the seven mounting positions, and one of the two electrodes of the simulation unit 5 is electrically connected to the wheel disc 41.

[0050] In a specific simulation process, the wheel 41 can be driven to rotate by the switching mechanism 4, so that the simulation unit 5 corresponding to the discharge defect to be simulated faces the conductive part 31, and the conductive part 31 contacts the electrode of the simulation unit 5 on the side away from the wheel 41 to form an electrical connection, so that the simulation unit 5 is connected to the defect simulation circuit, and the simulation test of the corresponding simulated discharge defect can be carried out. When it is necessary to switch its local discharge simulation position, the movable part 21 can be driven to move by the distance adjustment mechanism 2. After it moves to the required position, the test can be carried out. Conversely, the position adjustment can be carried out first. When the position adjustment is completed, the simulation unit 5 connected to the defect simulation circuit is switched by the switching mechanism 4.

[0051] In this embodiment, the pitch adjusting mechanism 2 also includes a first conductive rod 22 and a pitch adjusting motor 23. The first conductive rod 22 is arranged in the insulating air cavity and is threadedly connected to the movable part 21. The first conductive rod 22 is electrically connected to the conductive part 31 through the movable part 21. The pitch adjusting motor 23 is fixed on the housing 1, and the output end is transmission-connected to the first conductive rod 22 so as to drive the movable part 21 to move in a straight line in the insulating air cavity through the thread.

[0052] The first conductive rod 22 is a screw rod made of brass, and the movable part 21 thereon is a ball sleeve. The balls arranged in the ball sleeve can reduce the friction resistance when the movable part 21 and the first conductive rod 22 rotate relative to each other. At the same time, the conductive setting of the first conductive rod 22 does not need to set up additional circuits to achieve circuit connection after movement, and the pitch-adjusting motor 23 is fixed on the outside of the housing 1, and its output end is transmitted to the first conductive rod 22 through an insulating component, so that when the pitch-adjusting motor 23 drives the first conductive rod 22 to rotate, it can push the movable part 21 to move, and at the same time, the circuit on the first conductive rod 22 will not be transmitted to the pitch-adjusting motor 23, causing damage to the pitch-adjusting motor 23.

[0053] It should be noted that, since the outer shell 1 is a closed tank structure, in order to monitor the specific location of the simulation unit 5, a displacement sensor needs to be provided to detect the movement of the movable part 21. Specifically, an encoder or other device can be provided on the adjustable distance motor 23 to feedback the movement and specific position of the movable part 21 through an electrical signal, thereby making it more convenient for the operator to perform programming control.

[0054] like Figure 5 As shown, in order to make the simulation unit 5 and the conductive part 31 be in stable contact and form a good and stable loop, a conductive slot 501 is provided on the side of the simulation unit 5 away from the wheel 41, and the conductive slot 501 is used for the conductive part 31 to be inserted so that the simulation unit 5 and the conductive part 31 are electrically connected. The end of the conductive part 31 is semi-spherical, the conductive slot 501 is adapted to the conductive part 31, and the slot of the conductive slot 501 is arc-shaped and chamfered. When the wheel 41 of the switching mechanism 4 rotates, the conductive part 31 can be removed from the conductive slot 501 on the current simulation unit 5 and inserted into the conductive slot 501 of the next simulation unit 5. Since the conductive slot 501 is adapted to the conductive part 31, it has a larger contact area, thereby ensuring that there will be no significant obstruction to the flow of current.

[0055] Specifically, the connecting component 3 also includes a base 33 and an elastic member 34. The base 33 is fixed on the movable part 21. The conductive part 31 is arranged in the base 33, and one end extends to the outside of the base 33. The elastic member 34 is arranged in the base 33, and one end is fixed to the movable part 21. The elastic member 34 is used to push the conductive part 31 into the conductive slot 501 of the simulation unit 5.

[0056] The base 33 and the elastic member 34 are both made of conductive material. The elastic member 34 can be selected as a spring. A groove is also arranged on the base 33. A limiting plate is fixed on the side of the conductive part 31 away from the wheel disc 41. A cover is threadedly connected to the base 33 to limit the conductive part 31 in the groove through the limiting plate, so that the conductive part 31 cannot be separated from the base 33. The elastic member 34 is arranged in the groove, and one end is relatively fixed to the elastic member 34. When the wheel disc 41 rotates, the conductive slot 501 of the simulation unit 5 will push the conductive part 31 toward the inside of the slot through its arc-shaped slot, and at the same time, the elastic member 34 will produce elastic compression. Similarly, when the elastic member 34 needs to be inserted into the conductive slot 501 of the next simulation unit 5, the elastic member 34 can enter the conductive slot 501 of the simulation unit 5 through the expansion and contraction of the elastic member 34, and then form an electrical connection with the electrode of the simulation unit 5.

[0057] like Figure 3 As shown, in the present embodiment, the connection assembly 3 further includes two shielding plates 35, the two shielding plates 35 are both fixed on the insulating member 32, and are respectively located on both sides of the axial direction of the wheel disc 41, the two shielding plates 35 are symmetrically arranged in the axial direction of the wheel disc 41, and a clearance groove is provided on the side facing the conductive part 31, so that when one of the simulation units 5 is connected to the conductive part 31 for simulation operation, the strong electricity generated can be prevented from affecting other simulation units 5, and at the same time, the set clearance groove can prevent the shielding plate 35 from hindering the discharge simulation action of the simulation unit 5. Specifically, the shielding plate 35 is arranged in a circular shape as a whole, the clearance groove is an arc shape, and an arc chamfer is provided at the notch of the clearance groove, and the set clearance groove can enable the shielding plate 35 to expose the simulation unit 5 connected to the conductive part 31, and at the same time does not hinder the shielding plate 35 from shielding other simulation units 5.

[0058] In this embodiment, the switching mechanism 4 also includes a second conductive rod 42 and a switching motor 43. The second conductive rod 42 is rotatably arranged in the insulating air cavity. The wheel 41 is slidably arranged on the second conductive rod 42 and can rotate with the second conductive rod 42. The switching motor 43 is fixed on the housing 1, and the output end is transmission-connected to the second conductive rod 42.

[0059] The second conductive rod 42 and the first conductive rod 22 are the same rod-shaped copper components, and the second conductive rod 42 and the first conductive rod 22 are parallel to each other. Unlike the first conductive rod 22, the second conductive rod 42 is provided with edges, so that the wheel 41 can slide along a straight line on the second conductive rod 42, and drive the wheel 41 to rotate through the edges, that is, the wheel 41 can slide in a straight line on the second conductive rod 42 driven by the insulating member 32, and can rotate at the same time driven by the second conductive rod 42. In addition to driving the wheel 41 to rotate, the second conductive rod 42 can also play a role in guiding the wheel 41 in cooperation with the first conductive rod 22. The second conductive rod 42 is in contact with the wheel 41, and is electrically connected to the electrode at one end of each simulation unit 5 inserted into the wheel 41.

[0060] like Figure 6 As shown, specifically, the wheel disc 41 is provided with a multi-faceted hole 411, and the second conductive rod 42 penetrates the wheel disc 41 through the multi-faceted hole 411. The second conductive rod 42 is arranged in a multi-faceted column shape and is adapted to the multi-faceted hole 411, so that the second conductive rod 42 can drive the wheel disc 41 to rotate.

[0061] Furthermore, the multi-faceted hole 411 on the wheel disc 41 is a regular hexagonal hole, and the cross-section of the second conductive rod 42 perpendicular to the axial direction is also a regular hexagon. The multi-faceted hole 411 can be used to drive the wheel disc 41 to rotate through the six edges of the regular hexagon, and will not hinder the wheel disc 41 from sliding on the second conductive rod 42.

[0062] In addition, since the second conductive rod 42 needs to be directly connected to the high voltage, in order to prevent the high voltage from affecting the switching motor 43, an insulating terminal is also provided at the end where the second conductive rod 42 is connected to the switching motor 43, and an insulating umbrella skirt-like structure is provided on the insulating terminal to further improve its insulation performance, thereby protecting the switching motor 43.

[0063] In this embodiment, a plurality of mounting grooves 412 are provided on the wheel disc 41 , the number of the mounting grooves 412 is the same as the number of mounting positions, and the mounting grooves 412 are respectively arranged at each mounting position, and one end of the simulation unit 5 is inserted into the mounting groove 412 and is threadedly connected to the wheel disc 41 through the mounting groove 412 .

[0064] The mounting grooves 412 correspond to the mounting positions and are distributed in a ring shape on each mounting position, and the number of the mounting grooves 412 is the same as the number of the simulation units 5. The simulation unit 5 is provided with a thread on the outside of the electrode facing one end of the wheel disc 41, and is installed in the mounting groove 412 by screwing the thread and forming an electrical connection with the wheel disc 41. At the same time, since the simulation unit 5 is a wearing part, it needs to be replaced every 2-6 months during use. This arrangement can also facilitate the subsequent replacement operation of the simulation unit 5.

[0065] As a preferred embodiment, the shell 1 includes a simulation section 11 and a maintenance section 12, and the simulation section 11 and the maintenance section 12 are relatively fixed. The simulation section 11 is used for GIS partial discharge simulation. When the simulation unit 5 is moved to the maintenance section 12 through the distance adjustment mechanism 2, it can be replaced through the maintenance section 12. Specifically, the simulation section 11 and the maintenance section 12 are both parts on the tank branch of the shell 1, and the branch is composed of the simulation section 11 and the maintenance section 12. Since the device is configured as an adjustable distance structure, a fixed simulation unit 5 replacement position needs to be set during maintenance, namely the maintenance section 12. The simulation unit 5 is driven to move into the maintenance section 12 through the distance adjustment component 2, so as to perform the replacement operation of the simulation unit 5. The length of the simulation section 11 is set to 125.5 cm, and the length of the maintenance section 12 is set to 50 cm.

[0066] Specifically, an inspection window is set on the inspection section 12. When replacing the simulation unit 5, it is only necessary to drive the simulation unit 5 to be replaced to rotate toward the inspection window through the switching mechanism 4, and then the simulation unit 5 can be rotated to be removed and a new simulation unit 5 can be installed to realize the replacement of the simulation unit 5.

[0067] In addition, in the present embodiment, a sealing isolator 6 is further provided, and the sealing isolator 6 is fixed in the outer shell 1, and is used to divide the inner cavity of the outer shell 1 into a plurality of insulating air cavities, and the distance adjusting mechanism 2, the connecting component 3, the switching mechanism 4 and the simulation unit 5 are all arranged in the same insulating air cavity. When the simulation unit 5 is replaced, the insulating air cavity in which the simulation unit 5 is installed needs to be refilled, and the cost of SF6 gas is relatively high. In order to reduce the loss of SF6 gas when replacing the simulation unit 5, the distance adjusting mechanism 2, the connecting component 3, the switching mechanism 4 and the simulation unit 5 are separately isolated as an insulating air cavity, so as to avoid the need to refill the entire device with SF6 gas after replacing the simulation unit 5, thereby reducing the replacement cost of the simulation unit 5.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A GIS partial discharge simulation verification device, characterized by: It comprises a housing (1), a distance adjustment mechanism (2), a connection assembly (3), a switching mechanism (4), a simulation unit (5) and a sealing isolation member (6), wherein: An insulating air cavity is provided inside the shell (1), the shell (1) comprising a base and a tank body mounted on the base, the tank body being a column structure and having two parallel branches on the outside, a high-voltage coupling bushing for coupling external interference signals is provided on the top of the tank body of the shell (1), a high-voltage transformer is provided inside the tank body of the shell (1), and a coupling capacitor is provided in one of the branches of the shell (1); The pitch adjustment mechanism (2) is arranged in another branch of the housing (1), the pitch adjustment mechanism (2) comprising a movable portion (21), the movable portion (21) being located in the insulating air cavity and being movable along a straight line in the insulating air cavity, the pitch adjustment mechanism (2) further comprising a first conductive rod (22) and a pitch adjustment motor (23), wherein: The first conductive rod (22) is disposed in the insulating air cavity and is threadably connected to the movable portion (21); the first conductive rod (22) is electrically connected to the conductive portion (31) via the movable portion (21); The pitch-adjustable motor (23) is fixed on the housing (1), and the output end is drivingly connected to the first conductive rod (22) so as to drive the movable part (21) to move along a straight line in the insulating air cavity through a thread; The connection assembly (3) comprises a conductive part (31) and an insulating part (32), wherein the conductive part (31) is arranged on the movable part (21), and the insulating part (32) is fixed on the outer side of the movable part (21). The connection assembly (3) further comprises a base (33) and an elastic part (34), wherein: The base (33) is fixed on the movable part (21); the conductive part (31) is arranged inside the base (33) and one end of the conductive part extends to the outside of the base (33); The elastic member (34) is arranged in the base (33) and one end of which is fixed to the movable part (21), and the elastic member (34) is used to push the conductive part (31) to be inserted into the conductive slot (501) of the simulation unit (5); The switching mechanism (4) comprises a wheel disc (41), wherein the wheel disc (41) is movably arranged on the insulating member (32) and can rotate relative to the insulating member (32), and the wheel disc (41) is provided with a plurality of mounting positions distributed along the rotation direction thereof; There are a plurality of simulation units (5), which are respectively fixed on respective mounting positions of the wheel disc (41); the simulation units (5) are used to simulate GIS partial discharge defects; the wheel disc (41) is rotated to change the relative position of each simulation unit (5) and the conductive portion (31), and selectively connects one of the plurality of simulation units (5) to the conductive portion (31) to form a defect simulation loop; the distance adjustment mechanism (2) is used to drive the simulation unit (5) and the conductive portion (31) to move synchronously, so as to adjust the position of the defect simulation loop in the insulating air cavity; a conductive slot (501) is provided on a side of the simulation unit (5) away from the wheel disc (41); the conductive slot (501) is used for the conductive portion (31) to be inserted, so as to electrically connect the simulation unit (5) to the conductive portion (31); The switching mechanism (4) further comprises a second conductive rod (42) and a switching motor (43), wherein: The second conductive rod (42) is rotatably disposed in the insulating air cavity, and the wheel disc (41) is slidably disposed on the second conductive rod (42) and can rotate along with the second conductive rod (42); The switching motor (43) is fixed on the housing (1), and the output end is transmission-connected to the second conductive rod (42); A sealing isolator (6), the sealing isolator (6) being fixed in the housing (1) and used for dividing the inner cavity of the housing (1) into a plurality of insulating air cavities, the distance adjustment mechanism (2), the connection assembly (3), the switching mechanism (4) and the simulation unit (5) being all arranged in the same insulating air cavity; The wheel disc (41) is provided with a multi-faceted hole (411), the second conductive rod (42) passes through the wheel disc (41) through the multi-faceted hole (411), the second conductive rod (42) is arranged in a multi-faceted column shape and is adapted to the multi-faceted hole (411), so that the second conductive rod (42) can drive the wheel disc (41) to rotate, the wheel disc (41) is provided with a plurality of mounting grooves (412), the number of the mounting grooves (412) being the same as the number of mounting positions, and being arranged at each mounting position respectively, one end of the simulation unit (5) is inserted into the mounting groove (412), and is threadedly connected to the wheel disc (41) through the mounting groove (412); The housing (1) comprises a simulation section (11) and an overhaul section (12); the simulation section (11) and the overhaul section (12) are relatively fixed; the simulation section (11) is used to perform GIS partial discharge simulation; when the simulation unit (5) is displaced to the overhaul section (12) via the distance adjustment mechanism (2), it can be replaced via the overhaul section (12); the length of the simulation section (11) is set to 125.5 cm, and the length of the overhaul section (12) is set to 50 cm.

2. The GIS partial discharge simulation verification equipment according to claim 1, characterized in that: The connection assembly (3) further comprises two shielding plates (35), the two shielding plates (35) being fixed to the insulating member (32) and respectively located on two sides of the wheel disc (41) in the axial direction.

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