Partial discharge fault point positioning system under multipath pulse interference condition

Abstract

The utility model relates to the technical field of power transformer test and inspection, in particular to a partial discharge fault point positioning system under a multipath pulse interference condition, which comprises a support assembly and a first detection assembly connected onto the support assembly. According to the utility model, the vibration frequency spectrum of the transformer iron core is collected through the vibration sensor, and one measuring point is taken from each of four directions of the transformer iron core, so that the vibration frequency spectrum concentrated frequency band A of the transformer iron core is obtained through the vibration sensor; the ultrasonic signal probe is used for collecting ultrasonic signals on the surface of the transformer iron core and transmitting the ultrasonic signals to the first data processing and analyzing module, the first data processing and analyzing module is used for filtering based on the frequency band A to form a frequency band B, the frequency band B does not contain A, and the filtered signals are output to the oscilloscope; therefore, four position points can be formed by arranging the four ultrasonic signal probes, data of the four positions can be obtained by utilizing the oscilloscope, and finally electroacoustic positioning is carried out on the four positions.

Description

TECHNICAL FIELD

[0001] The utility model relates to power transformer test technical field especially relates to a kind of partial discharge fault point positioning systems under multi-channel pulse interference condition. BACKGROUND

[0002] Transformer is the device using the principle of electromagnetic induction to change AC voltage, and the main components are primary coil, secondary coil and core (magnetic core). Main functions include: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization (magnetic saturation transformer) and the like, and the existing transformer in the process of using, often needs to use test device to carry out test, to realize the fault detection of transformer.

[0003] At present, in the transformer test technical field, transformer partial discharge fault point positioning can realize accurate positioning, but for high-voltage, large-capacity transformer, reactor, due to the large volume of core, the vibration noise interference value of transformer, reactor core, body under high test voltage is much larger than the discharge sound wave value generated by partial discharge, and the conventional test method cannot carry out partial discharge ultrasonic positioning sound signal collection, which seriously affects the performance of partial discharge ultrasonic positioning test.

[0004] Therefore, aiming at the problem that the above fault point positioning system in the process of using, often because the body vibration noise interference value is much larger than the discharge sound wave value generated by partial discharge, so as to cause the collection of partial discharge ultrasonic positioning sound signal, and further affect the detection efficiency of the whole transformer. UTILITY MODEL CONTENTS

[0005] In order to overcome the problem that the existing fault point positioning system in the process of using, will be because of body vibration interference, so as to cause the difficulty of partial discharge ultrasonic positioning sound signal collection, and further affect the detection efficiency of transformer.

[0006] The technical scheme of the utility model is: a kind of partial discharge fault point positioning systems under multi-channel pulse interference condition, including support assembly, first detection component connected on support assembly, adjusting component connected on first detection component, second detection component movably connected on adjusting component, rotating component connected on support assembly and installation component rotatably connected on rotating component through rotating shaft, the adjusting component is used to drive second detection component to move along vertical direction, and the rotating component is used to drive installation component to rotate along the central axis of connecting shaft shaft;

[0007] The first detection assembly comprises an oscilloscope connected to a support assembly, a first data processing and analyzing module electrically connected to the oscilloscope, a plurality of connecting lines connected to the first data processing and analyzing module, an ultrasonic signal probe connected to the connecting lines, and an auxiliary fixing assembly connected to the support assembly; the oscilloscope is used to acquire data transmitted by the first data processing and analyzing module; the first data processing and analyzing module is used to filter data transmitted by the ultrasonic signal probe and transmit the data to the oscilloscope; and the ultrasonic signal probe is used to acquire ultrasonic signals on the transformer.

[0008] The second detection assembly comprises a sliding seat assembly movably connected to an adjusting assembly, a second data processing and analyzing module connected to the sliding seat assembly, a signal conditioner electrically connected to the second data processing and analyzing module, and a vibration sensor electrically connected to the signal conditioner; the second data processing and analyzing module is used to acquire and analyze data transmitted by the signal conditioner; the signal conditioner is used to acquire and adjust data transmitted by the vibration sensor; and the vibration sensor is used to acquire vibration frequency spectrum of the transformer.

[0009] Preferably, the auxiliary fixing assembly comprises a winding block connected to the support assembly, a fixing plate movably connected to the winding block, and a plurality of fixing frames connected to the support assembly; and the winding block is used to wind part of the connecting lines.

[0010] Preferably, the sliding seat assembly comprises a sliding block movably connected to the adjusting assembly, a mounting frame connected to the sliding block, a plurality of fixing rotating wheels movably connected to the mounting frame, a driving motor connected to one of the fixing rotating wheels, and a combination seat connected to the mounting frame; and the driving motor is used to drive the mounting frame to slide along the adjusting assembly.

[0011] Preferably, the support assembly comprises a first support connected to the oscilloscope, a connecting column connected to the first support, a second support movably connected to the connecting column, and a plurality of universal wheels respectively connected to the first support and the second support.

[0012] Preferably, the adjusting assembly comprises a telescopic seat respectively connected to the first support and the second support, a telescopic strip connected to the second support, a first surrounding frame connected to the telescopic strip near the first support, a second surrounding frame connected to the telescopic strip near the second support, and a connecting block connected between the second surrounding frame and the first surrounding frame; and the telescopic seat and the telescopic strip are used to drive the first surrounding frame and the second surrounding frame to move in a vertical direction.

[0013] As preferred, the rotating assembly comprises a rotating plate movably connected to the second support, a fixing plate connected to the rotating plate, a positioning rod connected to the fixing plate, a mounting seat movably connected to the positioning rod, and a hydraulic push rod connected to the mounting seat, the hydraulic push rod being used to drive the mounting seat to move along the positioning rod.

[0014] As preferred, the mounting assembly comprises a rotating frame movably connected to the mounting seat, a suction fan connected to the rotating frame, an isolation cover connected to the suction fan, a sliding sleeve connected to the rotating frame, a sliding bar movably connected to the sliding sleeve, a connecting head connected to the sliding bar, a moving block movably connected to the connecting head, and clamping plates connected to the moving block, the suction fan being used to drive the isolation cover to adhere to the transformer core.

[0015] The utility model discloses beneficial effect has:

[0016] 1, on the basis of conventional fault point positioning system, the positioning method of fault point is improved, the vibration spectrum of transformer core is gathered through vibration sensor, and one measuring point is taken in four directions of transformer core, so as to obtain the vibration spectrum concentrated band A of the transformer core through vibration sensor, then the surface of transformer core is gathered and is passed to first data processing analysis module through ultrasonic signal probe, and the first data processing analysis module is filtered based on band A, to form band B, and band B does not contain A, and the signal after filtering is output to oscilloscope, so that four position points can be formed by arranging four ultrasonic signal probes, the data of four positions are obtained by using oscilloscope, and finally electric acoustic positioning is carried out through four positions.

[0017] 2, the transformer core is acted on by the suction fan, so that the rotating frame can cooperate with the isolation cover under the action of the suction fan, so that the rotating frame can adhere to the transformer core, and the position of the sliding bar in the sliding sleeve is adjusted, so that the clamping plates can be pressed on the surface of the transformer core in the process of clamping the ultrasonic signal probe, so as to improve the detection accuracy of the ultrasonic signal probe, and the distance between the two clamping plates can be adjusted through the movably connected connecting head and moving block, so as to realize the position adjustment of the ultrasonic signal probe on the surface of the transformer core. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The first three-dimensional structure schematic diagram of the fault point positioning system of the utility model is shown.

[0019] Figure 2 The second three-dimensional structure schematic diagram of the fault point positioning system of the utility model is shown.

[0020] Figure 3 The adjustment assembly of the fault point positioning system is shown in the three-dimensional structure schematic view.

[0021] Figure 4 The first detection assembly of the fault point positioning system is shown in the three-dimensional structure schematic view.

[0022] Figure 5 The second detection assembly of the fault point positioning system is shown in the three-dimensional structure schematic view.

[0023] Figure 6 The installation assembly of the fault point positioning system is shown in the three-dimensional structure schematic view.

[0024] The figure mark explanation: 1, support assembly; 2, first detection assembly; 3, adjustment assembly; 4, second detection assembly; 5, rotating assembly; 6, installation assembly; 101, first support; 102, connecting column; 103, second support; 104, universal wheel; 201, oscilloscope; 202, first data processing and analysis module; 203, connecting line; 204, ultrasonic signal probe; 205, fixing frame; 206, winding block; 207, fixed plate; 301, telescopic seat; 302, telescopic strip; 303, first surrounding frame; 304, second surrounding frame; 305, connecting block; 401, sliding block; 402, mounting frame; 403, fixed runner; 404, driving motor; 405, combined seat; 406, second data processing and analysis module; 407, signal conditioner; 408, vibration sensor; 501, rotating plate; 502, fixed sheet; 503, positioning rod; 504, hydraulic push rod; 505, mounting seat; 601, rotating frame; 602, suction fan; 603, isolation cover; 604, sliding sleeve; 605, sliding strip; 606, connecting head; 607, moving block; 608, clamping sheet. DETAILED DESCRIPTION

[0025] The utility model is further explained below in combination with the drawings and examples.

[0026] A local partial discharge fault point positioning system under multi-path pulse interference condition, according to Figures 1-6 As shown in the figure, including support assembly 1, first detection assembly 2 connected on support assembly 1, adjustment assembly 3 connected on first detection assembly 2, second detection assembly 4 movably connected on adjustment assembly 3, rotating assembly 5 connected on support assembly 1 and installation assembly 6 rotatably connected on rotating assembly 5 through rotating shaft, adjustment assembly 3 is used to drive second detection assembly 4 to move along vertical direction, rotating assembly 5 is used to drive installation assembly 6 to rotate along the central axis of connecting shaft;

[0027] The first detection assembly 2 comprises an oscilloscope 201 connected to the support assembly 1, a first data processing and analysis module 202 electrically connected to the oscilloscope 201, a plurality of connecting lines 203 connected to the first data processing and analysis module 202, an ultrasonic signal probe 204 connected to the connecting lines 203, and an auxiliary fixing assembly connected to the support assembly 1. The oscilloscope 201 is used to acquire data transmitted by the first data processing and analysis module 202. The first data processing and analysis module 202 is used to filter data transmitted by the ultrasonic signal probe 204 and transmit the data to the oscilloscope 201. The ultrasonic signal probe 204 is used to acquire ultrasonic signals on the transformer.

[0028] The second detection assembly 4 comprises a sliding seat assembly movably connected to the adjusting assembly 3, a second data processing and analysis module 406 connected to the sliding seat assembly, a signal conditioner 407 electrically connected to the second data processing and analysis module 406, and a vibration sensor 408 electrically connected to the signal conditioner 407. The second data processing and analysis module 406 is used to acquire and analyze data transmitted by the signal conditioner 407. The signal conditioner 407 is used to acquire and adjust data transmitted by the vibration sensor 408. The vibration sensor 408 is used to acquire vibration frequency spectrum of the transformer.

[0029] It should be noted that the first data processing and analysis module 202 analyzes signals transmitted by the ultrasonic signal probe 204, and cooperates with the vibration frequency spectrum concentrated frequency band A analyzed by the second data processing and analysis module 406, so that the first data processing and analysis module 202 can filter the vibration frequency spectrum concentrated frequency band A to form a frequency band B, and transmit the formed frequency band B to the oscilloscope 201.

[0030] According to Figure 4 As shown in the drawings, the auxiliary fixing assembly comprises a winding block 206 connected to the support assembly 1, a fixing plate 207 movably connected to the winding block 206, and a plurality of fixing frames 205 connected to the support assembly 1. The winding block 206 is used to wind part of the connecting lines 203.

[0031] It should be noted that part of the connecting lines 203 are wound by the winding block 206, and the fixing plate 207 movably connected to the winding block 206 allows the user to remove the fixing plate 207 to remove part of the connecting lines 203 wound on the winding block 206, so that the user can adjust the position of the ultrasonic signal probe 204 abutting against the transformer core according to the length of the connecting lines 203.

[0032] According to Figure 5As shown, the slide assembly comprises a sliding block 401 movably connected to the adjusting assembly 3, a mounting frame 402 connected to the sliding block 401, a plurality of fixed rotating wheels 403 movably connected to the mounting frame 402, a driving motor 404 connected to one of the fixed rotating wheels 403, and a combination seat 405 connected to the mounting frame 402, the driving motor 404 being configured to drive the mounting frame 402 to slide along the adjusting assembly 3.

[0033] It should be noted that the fixed rotating wheels 403 are driven to rotate by the driving motor 404, and the mounting frame 402 is driven to slide on the first surrounding frame 303 and the second surrounding frame 304 by the rotating fixed rotating wheels 403, so that the vibration sensor 408 mounted on the sliding block 401 can perform multi-position detection on the surface of the transformer core, thereby summarizing the vibration data of the transformer core detected by the plurality of vibration sensors 408 to form the vibration spectrum concentrated frequency band A of the transformer core.

[0034] According to Figure 2 As shown, the support assembly 1 comprises a first support 101 connected to the oscilloscope 201, a connecting column 102 connected to the first support 101, a second support 103 movably connected to the connecting column 102, and a plurality of universal wheels 104 connected to the first support 101 and the second support 103, respectively.

[0035] According to Figure 3 As shown, the adjusting assembly 3 comprises a telescopic seat 301 connected to the first support 101 and the second support 103, respectively, a telescopic bar 302 connected to the second support 103, a first surrounding frame 303 connected to the telescopic bar 302 near the first support 101, a second surrounding frame 304 connected to the telescopic bar 302 near the second support 103, and a connecting block 305 connected between the second surrounding frame 304 and the first surrounding frame 303, the telescopic seat 301 and the telescopic bar 302 being configured to drive the first surrounding frame 303 and the second surrounding frame 304 to move in the vertical direction.

[0036] It should be noted that the position of the vibration sensor 408 can be adjusted according to the positions of the first surrounding frame 303 and the second surrounding frame 304 by adjusting the position of the telescopic bar 302 inside the telescopic seat 301, and the first surrounding frame 303 and the second surrounding frame 304 can be quickly disassembled by the connecting block 305, thereby greatly improving the convenience of the entire positioning system.

[0037] According to Figure 6As shown, the rotating assembly 5 comprises a rotating plate 501 movably connected to the second support 103, a fixing plate 502 connected to the rotating plate 501, a positioning rod 503 connected to the fixing plate 502, a mounting seat 505 movably connected to the positioning rod 503, and a hydraulic push rod 504 connected to the mounting seat 505, and the hydraulic push rod 504 is used to drive the mounting seat 505 to move along the positioning rod 503.

[0038] According to Figure 6 As shown, the mounting assembly 6 comprises a rotating frame 601 movably connected to the mounting seat 505, a suction fan 602 connected to the rotating frame 601, an isolation cover 603 connected to the suction fan 602, a sliding sleeve 604 connected to the rotating frame 601, a sliding bar 605 movably connected to the sliding sleeve 604, a connecting head 606 connected to the sliding bar 605, a moving block 607 movably connected to the connecting head 606, and a clamping plate 608 connected to the moving block 607, and the suction fan 602 is used to drive the isolation cover 603 to adhere to the transformer core.

[0039] It should be noted that the position adjustment of the connecting head 606 is realized by adjusting the position of the sliding bar 605 inside the sliding sleeve 604, and the position adjustment of the clamping plate 608 is realized by adjusting the position of the moving block 607 on the connecting head 606, so that the clamping plate 608 can adjust the detection position of the ultrasonic signal probe 204 during clamping, thereby greatly improving the use convenience of the entire positioning system.

[0040] The entire process can be realized by collecting the vibration frequency spectrum of the transformer core through the vibration sensor 408, and taking one measurement point in each of the four directions of the transformer core, so as to obtain the vibration frequency spectrum concentrated band A of the transformer core through the vibration sensor 408, and then collecting the ultrasonic signal of the surface of the transformer core through the ultrasonic signal probe 204 and transmitting it to the first data processing and analysis module 202, filtering based on the band A through the first data processing and analysis module 202 to form the band B, and the band B does not contain A, and then outputting the filtered signal to the oscilloscope 201, so that four ultrasonic signal probes 204 are arranged to form four position points, the data of the four positions are obtained through the oscilloscope 201, and finally the electroacoustic positioning is realized through the four positions

[0041] The embodiments of the utility model are described in detail in combination with the drawings above, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range of the person skilled in the art without departing from the purpose of the utility model.

Claims

1. A partial discharge fault location system under multi-channel pulse interference conditions, characterized in that: The assembly includes a support assembly (1), a first detection assembly (2) connected to the support assembly (1), an adjustment assembly (3) connected to the first detection assembly (2), a second detection assembly (4) movably connected to the adjustment assembly (3), a rotating assembly (5) connected to the support assembly (1), and a mounting assembly (6) rotatably connected to the rotating assembly (5) via a rotating shaft. The adjustment assembly (3) is used to drive the second detection assembly (4) to move in the vertical direction, and the rotating assembly (5) is used to drive the mounting assembly (6) to rotate along the central axis of the rotating shaft at the connection point. The first detection component (2) includes an oscilloscope (201) connected to the support assembly (1), a first data processing and analysis module (202) electrically connected to the oscilloscope (201), a plurality of connecting lines (203) connected to the first data processing and analysis module (202), an ultrasonic signal probe (204) connected to the connecting lines (203), and an auxiliary fixing component connected to the support assembly (1). The oscilloscope (201) is used to acquire data transmitted by the first data processing and analysis module (202). The first data processing and analysis module (202) is used to filter the data transmitted by the ultrasonic signal probe (204) and transmit it to the oscilloscope (201). The ultrasonic signal probe (204) is used to acquire ultrasonic signals on the transformer. The second detection component (4) includes a slide assembly movably connected to the adjustment component (3), a second data processing and analysis module (406) connected to the slide assembly, a signal conditioner (407) electrically connected to the second data processing and analysis module (406), and a vibration sensor (408) electrically connected to the signal conditioner (407). The second data processing and analysis module (406) is used to acquire and analyze the data transmitted by the signal conditioner (407). The signal conditioner (407) is used to acquire and adjust the data transmitted by the vibration sensor (408). The vibration sensor (408) is used to acquire the vibration spectrum of the transformer.

2. The partial discharge fault location system under multi-channel pulse interference conditions according to claim 1, characterized in that: The auxiliary fixing component includes a winding block (206) connected to the bracket assembly (1), a fixing plate (207) movably connected to the winding block (206), and a plurality of fixing brackets (205) connected to the bracket assembly (1). The winding block (206) is used to wind up part of the connecting wire (203).

3. The partial discharge fault location system under multi-channel pulse interference conditions according to claim 1, characterized in that: The slide assembly includes a sliding block (401) movably connected to the adjustment assembly (3), a mounting bracket (402) connected to the sliding block (401), a plurality of fixed rotating wheels (403) movably connected to the mounting bracket (402), a drive motor (404) connected to one of the fixed rotating wheels (403), and a combination seat (405) connected to the mounting bracket (402). The drive motor (404) is used to drive the mounting bracket (402) to slide along the adjustment assembly (3).

4. The partial discharge fault location system under multi-channel pulse interference conditions according to claim 2, characterized in that: The bracket assembly (1) includes a first bracket (101) connected to the oscilloscope (201), a connecting post (102) connected to the first bracket (101), a second bracket (103) movably connected to the connecting post (102), and a plurality of casters (104) respectively connected to the first bracket (101) and the second bracket (103).

5. A partial discharge fault location system under multi-channel pulse interference conditions according to claim 4, characterized in that: The adjustment assembly (3) includes a telescopic seat (301) connected to the first bracket (101) and the second bracket (103) respectively, a telescopic bar (302) connected to the second bracket (103), a first circumferential frame (303) connected to the telescopic bar (302) near the first bracket (101), a second circumferential frame (304) connected to the telescopic bar (302) near the second bracket (103), and a connecting block (305) connecting the second circumferential frame (304) and the first circumferential frame (303). The telescopic seat (301) and the telescopic bar (302) are used to drive the first circumferential frame (303) and the second circumferential frame (304) to move in the vertical direction.

6. The partial discharge fault location system under multi-channel pulse interference conditions according to claim 4, characterized in that: The rotating assembly (5) includes a rotating plate (501) movably connected to the second bracket (103), a fixed plate (502) connected to the rotating plate (501), a positioning rod (503) connected to the fixed plate (502), a mounting seat (505) movably connected to the positioning rod (503), and a hydraulic push rod (504) connected to the mounting seat (505). The hydraulic push rod (504) is used to drive the mounting seat (505) to move along the positioning rod (503).

7. A partial discharge fault location system under multi-channel pulse interference conditions according to claim 6, characterized in that: The mounting assembly (6) includes a rotating frame (601) movably connected to the mounting base (505), an exhaust fan (602) connected to the rotating frame (601), an isolation cover (603) connected to the exhaust fan (602), a sliding sleeve (604) connected to the rotating frame (601), a sliding bar (605) movably connected to the sliding sleeve (604), a connector (606) connected to the sliding bar (605), a moving block (607) movably connected to the connector (606), and a clamping piece (608) connected to the moving block (607). The exhaust fan (602) is used to drive the isolation cover (603) to abut against the transformer core.

Images