Transformer partial discharge experiment simulation equipment

Abstract

The invention discloses partial discharge experiment simulation equipment for a transformer, and aims to solve the problems that when partial discharge experiment simulation is carried out at present, a high-frequency current signal transmitted on a grounding wire cannot be detected, and errors of an experiment result are easily caused. According to the transformer partial discharge experiment simulation device, an adjusting detection mechanism is arranged on the box top wall of a box body, a simulation assembly is arranged on the box rear wall of the box body, and the adjusting detection mechanism comprises an insulating frame, a metal electrode, a supporting rod, a placement frame, a discharge simulation body, a rubber sleeve, a grounding wire, a high-frequency current sensor and a pull rod; the high-frequency current sensor is arranged on the discharge simulation body, current is generated in the discharge simulation body and transmitted to the ground wire, then the high-frequency current sensor detects the current, a worker records the partial discharge condition on the discharge simulation body through a current signal transmitted by the high-frequency current sensor, the position of the high-frequency current sensor is adjusted through the pull rod, and the accuracy of an experiment result is improved.

Description

Technical Field

[0001] The invention belongs to the field of partial discharge experiments, and in particular relates to a transformer partial discharge experiment simulation device. Background Art

[0002] During the operation of power transformers, partial discharge may occur due to the existence of the insulation system, which will cause damage to the insulation material and equipment failure. Partial discharge experimental simulation equipment is usually used in laboratories or research and development stages to simulate the performance and stability of transformers under partial discharge conditions through discharge simulation bodies.

[0003] In the prior art, a Chinese patent with patent announcement number CN219475763U discloses "a device for simulating partial discharge in transformer oil, including an oil tank, a cover plate is provided at the top of the oil tank, a horizontal adjustment component is provided at the bottom of the cover plate, the oil tank is detachably connected to the cover plate through the horizontal adjustment component, a through hole is provided at the center of the cover plate, a vertical adjustment component is provided in the through hole, a discharge component is detachably connected in the vertical adjustment component, a shielding component is provided at the top cover of the discharge component, and the shielding component is placed on the top surface of the cover plate. This invention realizes the simulation of partial discharge in oil with multi-position adjustment and multi-mode conversion by providing a horizontal adjustment component and a vertical adjustment component", but there are still the following defects:

[0004] (1) When simulating partial discharge experiments, it is unable to detect the high-frequency current signal transmitted on the ground wire, which can easily lead to errors in the experimental results and is not of reference value;

[0005] (2) It is not possible to observe the impact of environmental factors on the partial discharge phenomenon of the transformer by changing the environment inside the oil tank. Summary of the invention

[0006] The present invention provides a transformer partial discharge experiment simulation device to solve the problem that the high-frequency current signal transmitted on the grounding wire cannot be detected during the current partial discharge experiment simulation, which easily leads to errors in the experimental results and is not of reference value. In addition, it is impossible to observe the influence of environmental factors on the partial discharge phenomenon of the transformer by changing the environment in the box.

[0007] The transformer partial discharge experiment simulation device of the present invention comprises a box body, an adjustment detection mechanism and a simulation component, wherein the adjustment detection mechanism is arranged on the top wall of the box body, and the simulation component is arranged on the rear wall of the box body;

[0008] The adjustment and detection mechanism includes an insulating frame, a metal electrode, a support rod, a placement frame, a rubber frame, a discharge simulation body, a rubber sleeve, a grounding wire, a moving frame, a high-frequency current sensor and a pull rod. The cylindrical insulating frame extends vertically from the top wall of the box body into the box body and is slidably connected to the top wall of the box body. The metal electrode is sleeved in the insulating frame. Four support rods are vertically arranged at the bottom of the box body. The placement frame is fixed on the top of the four support rods. A rubber frame is attached to the inner wall of the placement frame. The discharge simulation body is placed in the rubber frame. A grounding wire is arranged at the bottom of the discharge simulation body. The grounding wire extends from the bottom wall of the box body. The moving frame is slidably connected to the bottom wall of the box body. The high-frequency current sensor is installed on one end of the moving frame. The other end of the moving frame is connected to the pull rod, and the pull rod extends from the side wall of the box body.

[0009] The simulation component includes an extension frame, an exhaust groove, a ventilation fan, a resistance wire, a fixed frame and a heat inlet groove. The extension frame is fixedly connected to the rear wall of the box body, and the exhaust groove is opened on the rear wall of the box body. The extension frame is fixedly connected to the exhaust groove of the box body and extends out of the rear wall of the box. The ventilation fan is installed in the extension frame, the fixed frame is set on the inner wall of the box, and the resistance wire is set in the fixed frame.

[0010] The transformer partial discharge test simulation device of the present invention has the following beneficial effects:

[0011] 1. The effect of detecting the high-frequency current signal transmitted on the grounding wire is achieved by setting the adjustment detection mechanism. By energizing the metal electrode, a current can be generated in the discharge simulation body and transmitted to the grounding wire, and then detected by the high-frequency current sensor. Subsequent staff can record the partial discharge situation on the discharge simulation body through the current signal transmitted by the high-frequency current sensor, and the position of the high-frequency current sensor can be adjusted by moving the frame and the pull rod, thereby improving the accuracy of the experimental results. This solves the problem in the prior art that the high-frequency current signal transmitted on the grounding wire cannot be detected during the partial discharge experiment simulation, which easily leads to errors in the experimental results and is not of reference value;

[0012] 2. By setting up the simulation components, it is possible to observe the influence of local discharge of the discharge simulation body by changing the environmental factors. When conducting the local discharge experiment, the external air can be blown into the frame through the ventilation fan to increase a certain humidity. The heat generated by the resistance wire can simulate the influence of high temperature on the local discharge of the discharge simulation body, which solves the problem in the prior art that it is impossible to observe the influence of environmental factors on the local discharge phenomenon of the transformer by changing the environment inside the oil tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a transformer partial discharge experiment simulation device of the present invention;

[0014] Figure 2 It is a front view of the transformer partial discharge test simulation device of the present invention;

[0015] Figure 3 for Figure 2 Schematic diagram of the cross-section structure at AA in the middle;

[0016] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0017] Figure 5 It is a right side cross-sectional structural schematic diagram of the transformer partial discharge test simulation device of the present invention;

[0018] Figure 6 It is a cross-sectional structural schematic diagram of the adjustment detection mechanism in the transformer partial discharge experiment simulation device of the present invention;

[0019] Indicated in the figure:

[0020] 1. Box body; 2. Adjustment and detection mechanism; 3. Simulation component; 201. Insulation frame; 202. Metal electrode; 203. Support rod; 204. Placement frame; 205. Rubber frame; 206. Discharge simulation body; 207. Rubber sleeve; 208. Ground wire; 209. Moving frame; 210. High-frequency current sensor; 211. Pull rod; 301. Extension frame; 302. Exhaust slot; 303. Ventilation fan; 304. Dustproof plate; 305. Resistance wire; 306. Fixed frame; 307. Heat inlet hole; 4. Slide slot; 5. Slide rod; 6. Threaded hole; 7. Bolt; 8. Stable slot; 9. Stable block; 10. First threaded column; 11. Insulation pad; 12. Baffle; 13. Insulation handle; 14. Tempered glass; 15. Fixed plate; 16. Second threaded column. DETAILED DESCRIPTION

[0021] Specific implementation method 1: The transformer partial discharge experiment simulation device of this implementation method includes a box body 1, an adjustment detection mechanism 2 and a simulation component 3. The adjustment detection mechanism 2 is arranged on the top wall of the box body 1, and the simulation component 3 is arranged on the rear wall of the box body 1;

[0022] The regulating and detecting mechanism 2 comprises an insulating frame 201, a metal electrode 202, a support rod 203, a placing frame 204, a rubber frame 205, a discharge simulation body 206, a rubber sleeve 207, a grounding wire 208, a moving frame 209, a high-frequency current sensor 210 and a pull rod 211. The cylindrical insulating frame 201 extends vertically into the box body 1 from the top wall of the box body 1 and is slidably connected to the top wall of the box body 1. The metal electrode 202 is sleeved in the insulating frame 201. Four support rods 203 are vertically arranged at the bottom of the box body 1. The placing frame 201 is provided with a plurality of support rods 203, each of which is provided with a plurality of support rods 203. 204 is fixed on the top of the four support rods 203, a rubber frame 205 is attached to the inner wall of the placement frame 204, a discharge simulation body 206 is placed in the rubber frame 205, a grounding wire 208 is arranged at the bottom of the discharge simulation body 206, the grounding wire 208 extends from the bottom wall of the box body 1, a moving frame 209 is slidably connected to the bottom wall of the box body 1, a high-frequency current sensor 210 is installed on one end of the moving frame 209, and the other end of the moving frame 209 is connected to a pull rod 211, and the pull rod 211 extends from the side box wall of the box body 1;

[0023] The simulation component 3 includes an extension frame 301, an exhaust groove 302, a ventilation fan 303, a resistance wire 305, a fixed frame 306 and a heat inlet groove 307. The extension frame 301 is fixedly connected to the rear wall of the box body 1, and the exhaust groove 302 is opened on the rear wall of the box body 1. The extension frame 301 is fixedly connected to the exhaust groove 302 of the box body 1 and extends out of the rear wall of the box. The ventilation fan 303 is installed in the extension frame 301, and the fixed frame 306 is set on the inner wall of the box body 1. The resistance wire 305 is set in the fixed frame 306.

[0024] Specific embodiment 2: This embodiment is different from the specific embodiment 1 in that a baffle 12 is hinged on the front of the box body 1 , and an insulating handle 13 is provided on one side of the baffle 12 .

[0025] In this embodiment, the baffle 12 and one side of the box body 1 are fixedly connected with a fixing plate 15 , and the internal thread of the fixing plate 15 is connected with a second threaded column 16 , and the baffle 12 is closed by the thread.

[0026] Specific embodiment three: This embodiment is different from the specific embodiment two in that a tempered glass 14 is arranged inside the baffle 12 .

[0027] Specific implementation method 4: This implementation method is different from specific implementation methods 1 to 3 in that a rubber sleeve 207 is provided on the outer wall of the discharge simulation body 206 .

[0028] Specific implementation mode 5: This implementation mode is different from specific implementation modes 1 to 4 in that the dustproof plate 304 is fixedly connected to the extension frame 301 .

[0029] Specific implementation example 6: This implementation example is different from specific implementation examples 1 to 5 in that a plurality of heat inlet holes 307 are provided on the fixing frame 306 .

[0030] Specific embodiment seven: This embodiment is different from any one of specific embodiments one to six in that vertical slide grooves 4 are respectively opened on the two side walls of the box body 1, and a plurality of threaded holes 6 are opened on one side of the slide groove 4 along the height direction. The two slide grooves 4 are arranged opposite to each other, and two slide rods 5 are fixedly connected to the outer wall of the insulating frame 201, each slide rod 5 passes through the slide groove 4, and a connecting plate is arranged at the end of the slide rod 5, and bolts 7 pass through the connecting plate and the threaded holes 6 to fix the position of the insulating frame 201.

[0031] Specific embodiment eight: This embodiment is different from any one of specific embodiments one to seven in that a stabilizing groove 8 is opened on the bottom wall of the box body 1, and a stabilizing block 9 is slidably connected inside the stabilizing groove 8, and the stabilizing block 9 is fixed to the bottom of the moving frame 209.

[0032] Specific embodiment nine: This embodiment is different from any one of specific embodiments one to eight in that two threaded holes are opened opposite to each other on the placement frame 204, a first threaded column 10 is screwed into the threaded hole, an insulating pad 11 is provided at the end of the first threaded column 10, and the insulating pad 11 is tightly fitted with the rubber sleeve 207.

[0033] In this embodiment, the discharge simulation body 206 is clamped by two first threaded columns.

[0034] Embodiment: The transformer partial discharge experiment simulation device of this embodiment includes a box body 1, an adjustment detection mechanism 2 and a simulation component 3, wherein the adjustment detection mechanism 2 is arranged on the top wall of the box body 1, and the simulation component 3 is arranged on the rear wall of the box body 1;

[0035] The regulating and detecting mechanism 2 comprises an insulating frame 201, a metal electrode 202, a supporting rod 203, a placing frame 204, a rubber frame 205, a discharge simulation body 206, a rubber sleeve 207, a grounding wire 208, a moving frame 209, a high-frequency current sensor 210 and a pull rod 211. The cylindrical insulating frame 201 vertically extends from the top wall of the box body 1 into the box body 1 and is slidably connected to the top wall of the box body 1. The metal electrode 202 is sleeved in the insulating frame 201. Vertical slide grooves 4 are respectively opened on the box walls on both sides of the box body 1. A plurality of threaded holes 6 are opened on one side of the slide groove 4 along the height direction. The two slide grooves 4 are arranged opposite to each other. Two slide rods 5 are fixedly connected to the outer wall of the insulating frame 201. Each slide rod 5 passes through the slide groove 4. A connecting plate is arranged at the end of the slide rod 5. Bolts 7 pass through the connecting plate and the threaded holes 6 to fix the position of the insulating frame 201.

[0036] Four support rods 203 are vertically arranged at the bottom of the box body 1, a placement frame 204 is fixed on the top of the four support rods 203, a rubber frame 205 is attached to the inner wall of the placement frame 204, a discharge simulation body 206 is placed in the rubber frame 205, a grounding wire 208 is arranged at the bottom of the discharge simulation body 206, the grounding wire 208 extends from the bottom wall of the box body 1, a moving frame 209 is slidably connected to the bottom wall of the box body 1, a high-frequency current sensor 210 is installed on one end of the moving frame 209, and a pull rod 211 is connected to the other end of the moving frame 209, and the pull rod 211 extends from the side box wall of the box body 1, a stabilizing groove 8 is opened on the bottom wall of the box body 1, a stabilizing block 9 is slidably connected inside the stabilizing groove 8, and the stabilizing block 9 is fixed to the bottom of the moving frame 209;

[0037] The simulation component 3 includes an extension frame 301, an exhaust groove 302, a ventilation fan 303, a resistance wire 305, a fixed frame 306 and a heat inlet groove 307. The extension frame 301 is fixedly connected to the rear wall of the box body 1, and the exhaust groove 302 is opened on the rear wall of the box body 1. The extension frame 301 is fixedly connected to the exhaust groove 302 of the box body 1 and extends out of the rear wall of the box. The ventilation fan 303 is installed in the extension frame 301, and the fixed frame 306 is set on the inner wall of the box body 1. The resistance wire 305 is set in the fixed frame 306, and a plurality of heat inlet holes 307 are opened on the fixed frame 306.

[0038] When in use, the discharge simulation body 206 simulates the working state of the transformer, and is covered with a rubber sleeve 207 and placed in the rubber frame 205, so that the grounding wire 208 passes through the frame 1 and is grounded. The first threaded column 10 is rotated to make the insulating pad 11 squeeze the two sides of the discharge simulation body 206 to clamp it to prevent it from moving during the experiment. By pulling the slide bar 5, the height of the insulating frame 201 and the metal electrode 202 can be adjusted to make the discharge end of the metal electrode 202 contact with the discharge simulation body 206, and then the bolt 7 is screwed into the threaded hole 6 to complete the fixation of the slide bar 5. The position of the moving frame 209 and the high-frequency current sensor 210 is adjusted by the pull rod 211 to make it contact with the grounding wire 208. When conducting the experiment, the baffle 12 is closed. , screw the second threaded column 16 into the fixing plate 15 to complete the fixation of the baffle 12, observe the experimental conditions inside the frame 1 through the tempered glass 14, energize the metal electrode 202, allow the current to enter the discharge simulation body 206, and be transmitted to the grounding wire 208, the rubber frame 205, the rubber sleeve 207 and the insulating pad 11 are set to prevent the current from overflowing, so that the current can only be transmitted through the grounding wire 208, the high-frequency current sensor 210 can detect the current signal transmitted on the grounding wire 208, and transmit it to the external receiving device, the staff can judge the impact of local discharge on the discharge simulation body 206 by recording and observing the transmitted current signal, and the stabilizing groove 8 and the stabilizing block 9 can increase the stability of the high-frequency current sensor 210 when moving.

[0039] Specifically, Figure 4 As shown, the simulation component 3 includes an extension frame 301, an exhaust groove 302, a ventilation fan 303, a dustproof plate 304, a resistance wire 305, a fixed frame 306 and a heat inlet groove 307. The extension frame 301 is fixedly connected to one side of the frame body 1, the exhaust groove 302 is opened inside the frame body 1, the ventilation fan 303 is arranged on one side of the extension frame 301, multiple dustproof plates 304 are fixedly connected to one side of the extension frame 301, the resistance wire 305 is arranged on the inner wall of the frame body 1, the fixed frame 306 is fixedly connected to the inner wall of the frame body 1, and multiple heat inlet grooves 307 are opened inside the fixed frame 306.

[0040] When conducting a partial discharge experiment, the ventilation fan 303 is started to blow external air into the frame 1 through the dustproof plate 304 and the exhaust slot 302, so that the discharge simulation body 206 simulates the working environment of the transformer, and the resistance wire 305 is energized. The dissipated heat will enter the frame 1 through the heat inlet slot 307 at the fixed frame 306, and the partial discharge of the discharge simulation body 206 at high temperature is observed.

[0041] When the transformer partial discharge experiment simulation device of this embodiment is used: the discharge simulation body 206 simulates the working state of the transformer, and is placed in the rubber frame 205, so that the grounding wire 208 passes through the frame 1 and is grounded, and the first threaded column 10 is rotated to clamp the discharge simulation body 206 of the insulating pad 11. By pulling the sliding rod 5, the height of the insulating frame 201 and the metal electrode 202 can be adjusted to make the discharge end of the metal electrode 202 contact with the discharge simulation body 206, and the position of the moving frame 209 and the high-frequency current sensor 210 is adjusted by the pull rod 211 to make it contact with the grounding wire 208. When conducting the experiment, the baffle 12 is closed, and the metal electrode 202 is energized to allow the current to flow in. The current is input into the discharge simulation body 206 and transmitted to the ground wire 208. The high-frequency current sensor 210 can detect the current signal transmitted on the ground wire 208 and transmit it to the external receiving device. The staff can determine the impact of local discharge on the discharge simulation body 206 by recording and observing the transmitted current signal, start the ventilation fan 303, and blow the external air into the frame 1 through the dustproof plate 304 and the exhaust groove 302, so that the discharge simulation body 206 can simulate the working environment of the transformer, and energize the resistance wire 305. The dissipated heat will enter the frame 1 through the heat inlet groove 307 at the fixed frame 306, and observe the local discharge of the discharge simulation body 206 at high temperature.

Claims

1. A transformer partial discharge test simulation device, characterized in that The transformer partial discharge experiment simulation device comprises a box body (1), an adjustment detection mechanism (2) and a simulation component (3); the adjustment detection mechanism (2) is arranged on the top wall of the box body (1), and the simulation component (3) is arranged on the rear wall of the box body (1); The regulating and detecting mechanism (2) comprises an insulating frame (201), a metal electrode (202), a support rod (203), a placement frame (204), a rubber frame (205), a discharge simulation body (206), a rubber sleeve (207), a grounding wire (208), a moving frame (209), a high-frequency current sensor (210) and a pull rod (211); the cylindrical insulating frame (201) vertically extends from the top wall of the box body (1) into the box body (1) and is slidably connected to the top wall of the box body (1); the metal electrode (202) is sleeved in the insulating frame (201); four support rods (203) are vertically arranged on the bottom of the box body (1); A placement frame (204) is fixed on the top of four support rods (203); a rubber frame (205) is attached to the inner wall of the placement frame (204); a discharge simulation body (206) is placed in the rubber frame (205); a grounding wire (208) is arranged at the bottom of the discharge simulation body (206); the grounding wire (208) extends from the bottom wall of the box body (1); a moving frame (209) is slidably connected to the bottom wall of the box body (1); a high-frequency current sensor (210) is installed on one end of the moving frame (209); the other end of the moving frame (209) is connected to a pull rod (211); the pull rod (211) extends from the side box wall of the box body (1); The simulation component (3) comprises an extension frame (301), an exhaust groove (302), a ventilation fan (303), a resistance wire (305), a fixing frame (306) and a heat inlet groove (307); the extension frame (301) is fixedly connected to the rear wall of the box body (1); the exhaust groove (302) is provided on the rear wall of the box body (1); the extension frame (301) is fixedly connected to the exhaust groove (302) of the box body (1) and extends out of the rear wall; the ventilation fan (303) is installed in the extension frame (301); the fixing frame (306) is arranged on the inner wall of the box body (1); and the resistance wire (305) is arranged in the fixing frame (306).

2. The transformer partial discharge test simulation device according to claim 1 is characterized in that A baffle (12) is hingedly connected to the front of the box body (1), and an insulating handle (13) is arranged on one side of the baffle (12).

3. The transformer partial discharge test simulation device according to claim 2 is characterized in that Tempered glass (14) is arranged inside the baffle (12).

4. The transformer partial discharge test simulation device according to claim 1 is characterized in that A rubber sleeve (207) is sleeved on the outer wall of the discharge simulation body (206).

5. The transformer partial discharge test simulation device according to claim 1 is characterized in that The dustproof plate (304) is fixedly connected to the extension frame (301).

6. The transformer partial discharge test simulation device according to claim 1 is characterized in that A plurality of heat inlet holes (307) are provided on the fixing frame (306).

7. The transformer partial discharge test simulation device according to claim 1 is characterized in that Vertical slide grooves (4) are respectively provided on the box walls on both sides of the box body (1), and a plurality of threaded holes (6) are provided on one side of the slide groove (4) along the height direction. The two slide grooves (4) are arranged opposite to each other, and two slide rods (5) are fixedly connected to the outer wall of the insulating frame (201), and each slide rod (5) passes through the slide groove (4). A connecting plate is provided at the end of the slide rod (5), and a bolt (7) passes through the connecting plate and the threaded hole (6) to fix the position of the insulating frame (201).

8. The transformer partial discharge test simulation device according to claim 1 is characterized in that A stabilizing groove (8) is provided on the bottom wall of the box body (1), and a stabilizing block (9) is slidably connected inside the stabilizing groove (8), and the stabilizing block (9) is fixed on the bottom of the moving frame (209).

9. The transformer partial discharge test simulation device according to claim 1 is characterized in that Two threaded holes are formed opposite to each other on the placement frame (204), a first threaded column (10) is screwed into the threaded hole, an insulating pad (11) is provided at the end of the first threaded column (10), and the insulating pad (11) is tightly fitted with the rubber sleeve (207).

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