An on-line analysis and monitoring device and method for transformer fault diagnosis

Abstract

The present invention discloses an on-line analysis and monitoring device and method for transformer fault diagnosis, and the present invention relates to the technical field of transformer monitoring devices. By arranging monitoring data acquisition mechanisms at multiple positions, high-frequency pulse current sound data at multiple positions inside the transformer body can be simultaneously acquired at the initial position. Moreover, during the process of adjusting the distance between the first lifting mechanism and the second lifting mechanism, in cooperation with the first driving unit and the second driving unit, the first monitoring unit and the second monitoring unit in each monitoring data acquisition mechanism can also move synchronously in the vertical direction and the horizontal direction at the same time, so as to synchronously acquire high-frequency pulse current sound data at more different positions inside the transformer body, enabling multi-position three-dimensional monitoring of the transformer body with a smaller number of monitoring units, and being able to more quickly and accurately locate the occurrence position of the high-frequency pulse current, thereby facilitating the subsequent timely maintenance of the insulation defect position.

Description

Technical Field

[0001] The present invention relates to the technical field of transformer monitoring equipment, and particularly to an on-line analysis and monitoring equipment and method for transformer fault diagnosis. Background Art

[0002] A transformer is a key core equipment in the power system. Once a serious fault occurs and an accident is triggered, it may lead to the collapse of the power system, seriously affecting the safe operation of the power grid and the power supply reliability. Therefore, the diagnosis and analysis of internal defects of transformers have always been the core of substation operation and maintenance. According to the internal defect forms of transformers, they mainly include insulation defects, overheating defects, and mechanical defects.

[0003] Among them, partial discharge inside the transformer is one of the main manifestations in the early stage of insulation defect faults. It is mainly because high-frequency pulse current is generated due to bubbles and cracks in the transformer insulation layer. And at the same time of partial discharge inside the transformer, there is a "squeaking" or "crackling" sound. The greater the discharge energy, the more obvious the sound. Therefore, by identifying the position of the partial discharge sound, the position where the high-frequency pulse current is generated can be indirectly located.

[0004] Referring to a transformer fault diagnosis and monitoring equipment and its monitoring method disclosed in a patent application with the publication number of CN117192272A, by winding multiple monitoring wires around a rotating cylinder using hook blocks, it is possible to effectively prevent the multiple wires from being wound together. In this way, the chaos and intersection between the lines during the monitoring process can be reduced, making the operation more convenient and smooth. After winding the multiple monitoring wires around the rotating cylinder, the wires can be neatly arranged together, avoiding the crossing and interlacing of the wires and reducing the risk of chaos and short circuit. In this way, the operator can more clearly identify the connection status of each wire and perform corresponding operations and monitoring.

[0005] The above-mentioned transformer fault diagnosis and monitoring equipment in the prior art has the following defects in actual use:

[0006] 1) When using an ultrasonic sensor to perform acoustic detection on the outer wall of the transformer to locate the position of the high-frequency pulse current, it is necessary to align the sensor with multiple positions on the outer wall of the transformer one by one to collect acoustic signals. This monitoring method is not only cumbersome, but also has a very high repetition rate of monitoring operations, which has high requirements for the patience and physical strength of the operator and cannot obtain acoustic data at multiple positions inside the transformer in a short time.

[0007] 2) Since the outer wall area of the transformer is large and there are many positions to be detected, it often takes a lot of time to complete the entire detection process, which not only reduces the monitoring efficiency, but also easily delays the judgment of the transformer fault position, thus unable to repair the fault in time and causing greater damage to the transformer.

[0008] Therefore, the present invention proposes an on-line analysis and monitoring device and method for transformer fault diagnosis to solve the above problems. Summary of the Invention

[0009] Aiming at the deficiencies of the prior art, the present invention provides an on-line analysis and monitoring device and method for transformer fault diagnosis, which solves the problem that when using an ultrasonic sensor to locate the position of a high-frequency pulse current, the sensor needs to be aligned with multiple positions on the outer wall of the transformer one by one to collect acoustic wave signals. This monitoring method is not only cumbersome, but also has a very high monitoring operation repeatability, which has high requirements for the patience and physical strength of the operator, and cannot obtain acoustic wave data at multiple positions inside the transformer in a short time. Moreover, due to the large area of the outer wall of the transformer and the large number of positions to be detected, it often takes a lot of time to complete the entire detection process, which not only reduces the monitoring efficiency, but also easily delays the judgment of the fault position of the transformer, thus unable to repair the fault in time and causing greater damage to the transformer.

[0010] To achieve the above objectives, the present invention is realized through the following technical solutions: An on-line analysis and monitoring device for transformer fault diagnosis includes a transformer body, a fault monitoring control cabinet, and heat dissipation fins fixedly arranged on the outer wall of the transformer body. An installation groove is formed between the heat dissipation fins and the outer wall of the transformer body. The device further includes:

[0011] A high-frequency pulse current monitoring mechanism, which is arranged inside the installation groove and is movably connected relative to the outer wall of the transformer body, is used to simultaneously obtain acoustic wave signals at multiple positions inside the transformer body, and can dynamically change the monitoring position during the process of obtaining acoustic wave data to obtain acoustic wave data at more positions, and accurately locate the occurrence position of the high-frequency pulse current through multiple groups of acoustic wave data;

[0012] The high-frequency pulse current monitoring mechanism includes a first lifting mechanism and a second lifting mechanism arranged parallel to each other up and down. On the left and right sides of the outer walls of the first lifting mechanism and the second lifting mechanism, a first monitoring range adjustment mechanism and a second monitoring range adjustment mechanism are respectively arranged for synchronously adjusting the distance between the two. And on the front and back sides of the outer walls of the first lifting mechanism and the second lifting mechanism, a plurality of monitoring data acquisition mechanisms are evenly arranged. The monitoring data acquisition mechanisms continuously adjust the signal monitoring position during the process of adjusting the distance between the first lifting mechanism and the second lifting mechanism.

[0013] Furthermore, the structures of the first lifting mechanism and the second lifting mechanism are the same. The first lifting mechanism includes a first frame component and a second frame component arranged opposite to each other left and right. The first frame component and the second frame component are connected by a first connecting component and a second connecting component, and the distance between the first frame component and the second frame component can be adjusted by the first connecting component and the second connecting component. The width between the first frame component and the second frame component can be adjusted adaptively according to the size of the transformer;

[0014] The structures of the first frame component and the second frame component are the same. The first frame component includes an L-shaped support arm one and an L-shaped support arm two which are oppositely arranged. Chute one is provided at the top of both the L-shaped support arm one and the L-shaped support arm two. And a width expansion arm is fixedly provided at one end of the L-shaped support arm one close to the L-shaped support arm two. A first cavity with a structure adapted to that of the width expansion arm is provided at one end of the L-shaped support arm two close to the L-shaped support arm one. The width expansion arm is slidably arranged in the first cavity. And a scale wire groove one for measuring the length of the part extending out of the first cavity is provided on the outer wall of the width expansion arm. An activity cavity is provided at both the chute one and the end of the L-shaped support arm two close to the first connection component and the second connection component. The width expansion arm and the L-shaped support arm two are locked by a fastening bolt.

[0015] Further, the structures of the first connection component and the second connection component are the same. The first connection component includes a linear support arm and a chute two provided at the top of the linear support arm. And a length expansion arm is fixedly provided at both ends of the linear support arm. Scale wire grooves two are provided on the outer wall of each length expansion arm. A plurality of length expansion arms are slidably arranged in the activity cavities at corresponding positions. The activity cavity and the length expansion arm are locked by a fastening bolt.

[0016] Further, the first monitoring range regulating mechanism includes two mounting seats which are arranged oppositely up and down. A driving shaft is rotatably arranged between the two mounting seats. A micro servo motor is fixedly provided at the bottom of the lower mounting seat. The output shaft of the micro servo motor rotates through the mounting seat and is fixedly connected to the driving shaft. Spiral driving grooves one and two are symmetrically provided on the upper and lower sides of the outer wall of the driving shaft. A first lifting component is slidably arranged in the spiral driving groove one. A second lifting component is slidably arranged in the spiral driving groove two.

[0017] Further, the structures of the first lifting component and the second lifting component are the same. The first lifting component includes a sleeve and a second cavity provided at one end of the sleeve. An extension arm is slidably arranged in the second cavity. And mounting sleeves are fixedly provided at the ends of the sleeve and the extension arm which are far away from each other. A first driving rod is fixedly provided on the front surface of the sleeve.

[0018] Further, the monitoring data acquisition mechanism includes a side plate and a driving unit one and a driving unit two which are symmetrically arranged on the upper and lower sides of the outer wall of the side plate. A first monitoring unit for monitoring the high-frequency pulse current sound inside the transformer body and a second monitoring unit are respectively arranged in the driving unit one and the driving unit two.

[0019] Further, the structures of the first driving unit and the second driving unit are the same. The first driving unit includes an inclined guiding groove formed on the outer wall of the side plate, and a rack is fixedly arranged on the outer wall of the side plate and on one side of the inclined guiding groove. The inclined guiding groove and the rack are arranged in parallel.

[0020] Further, the structures of the first monitoring unit and the second monitoring unit are the same. The first monitoring unit includes a sliding seat and a cylinder body fixedly arranged on the top of the sliding seat through a bracket. A second driving rod slidably arranged in the inclined guiding groove at the corresponding position is fixedly arranged on the side wall of the sliding seat. An ultrasonic sensor is fixedly arranged at one end of the cylinder body close to the transformer body. A dust removal assembly for purging the dust on the outer wall of the transformer body before the ultrasonic sensor monitors data is further arranged inside the cylinder body, and a rotation acceleration assembly for driving the dust removal assembly to operate is further arranged at one end of the cylinder body far from the ultrasonic sensor.

[0021] Further, the dust removal assembly includes a transmission shaft rotatably arranged in the cylinder body through a mounting frame. A scroll fan is fixedly arranged at one end of the transmission shaft. An annular pipe is fixedly sleeved outside the ultrasonic sensor, and dust removal nozzles communicated with the inside thereof are uniformly fixedly arranged on the outer wall of the annular pipe.

[0022] The rotation acceleration assembly includes a protective cover detachably arranged at one end of the cylinder body. A plurality of air inlets are uniformly formed on the outer wall of the protective cover. A transmission is fixedly arranged on the outer wall of the protective cover far from the cylinder body. A gear meshed with the rack at the corresponding position is fixedly arranged on the input shaft of the transmission. The output shaft of the transmission rotates through the protective cover and is connected with the transmission shaft.

[0023] The present invention also discloses a method for online analysis and monitoring of transformer fault diagnosis, which is used for an online analysis and monitoring device for transformer fault diagnosis. The method includes the following steps:

[0024] Step 1: The controller inside the fault monitoring control cabinet simultaneously controls the monitoring data acquisition mechanisms at multiple positions to monitor the sounds emitted by the high-frequency pulse currents at the corresponding positions inside the transformer body, and simultaneously acquires multiple monitoring data at different positions inside the transformer body.

[0025] Step 2: The first monitoring range adjustment mechanism and the second monitoring range adjustment mechanism simultaneously drive the first lifting mechanism and the second lifting mechanism to move away from or close to each other. The monitoring data acquisition mechanisms at multiple positions simultaneously change the monitoring positions of the transformer body, and capture new high-frequency pulse current sound data again after reaching the preset positions.

[0026] Step 3: The fault monitoring control cabinet analyzes and judges the captured high-frequency pulse current sound data at multiple positions, and comprehensively judges the position where the high-frequency pulse current occurs according to the analysis results to determine the internal insulation fault position of the transformer body.

[0027] The present invention provides an on-line analysis and monitoring device and method for transformer fault diagnosis. Compared with the prior art, it has the following beneficial effects:

[0028] 1. An on-line analysis and monitoring device and method for transformer fault diagnosis. By simultaneously arranging monitoring data acquisition mechanisms at multiple positions, high-frequency pulse current sound data at multiple positions inside the transformer body can be obtained simultaneously at the initial position. And during the process of adjusting the distance between the first lifting mechanism and the second lifting mechanism, in cooperation with the first driving unit and the second driving unit, the first monitoring unit and the second monitoring unit in each monitoring data acquisition mechanism can also move synchronously in the vertical direction and the horizontal direction at the same time. Thus, the first monitoring unit and the second monitoring unit can sweep across multiple positions on the transformer body in a short time, and can synchronously obtain high-frequency pulse current sound data at more different positions inside the transformer body to establish a three-dimensional network of internal monitoring data of the transformer body, enabling multi-position three-dimensional monitoring of the transformer body with a relatively small number of monitoring units. And through comprehensive analysis and judgment of multiple groups of data at multiple positions, the occurrence position of the high-frequency pulse current can be located more quickly and accurately, thus facilitating the timely maintenance of the insulation defect position and avoiding the further expansion of the fault range of the insulation defect position.

[0029] 2. An on-line analysis and monitoring device and method for transformer fault diagnosis. When the first monitoring unit and the second monitoring unit adjust the monitoring position, the gear can form a linkage with the rack. After the rack drives the gear to rotate, the turbo fan is driven to rotate through the acceleration of the transmission. The suction force generated by the rotation of the turbo fan sucks the external air into the cylinder body, and the high-speed air flow output from the air nozzle is used to blow the outer wall position of the transformer body to be monitored, so that the dust and other impurities attached to the outer wall of the transformer body can be separated, and the outer wall of the transformer body is cleaned before the first monitoring unit and the second monitoring unit perform the monitoring action, avoiding the interference of the impurity layer on the propagation of the sound signal, ensuring the accuracy of the monitoring data acquisition. Moreover, no separate driving device is required for the cleaning process of the outer wall of the transformer body, making the structure of the first monitoring unit and the second monitoring unit simpler, and at the same time saving the cost of setting up the driving device.

[0030] 3. A transformer fault diagnosis online analysis and monitoring device and method, wherein the spacing between frame assembly 1 and frame assembly 2 in lifting mechanism No. 1 and lifting mechanism No. 2 can be increased or decreased by connecting assembly 1 and connecting assembly 2, and the spacing between L-shaped support arm 1 and L-shaped support arm 2 in frame assembly 1 and frame assembly 2 themselves can also be adjusted according to the size requirements of the transformer body, and the adjustment process is referenced by a scale groove, making the spacing adjustment process more accurate. After the length and width of lifting mechanism No. 1 and lifting mechanism No. 2 can be adjusted to a variety of sizes, they can be installed on the outside of transformer bodies of various sizes, thereby greatly expanding the scope of application of the present invention and having high practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the first overall three-dimensional structure of the present invention;

[0032] Figure 2 This is a schematic diagram of the second overall three-dimensional structure of the present invention;

[0033] Figure 3 This is a schematic diagram of the state structure of the present invention without the fault monitoring cabinet;

[0034] Figure 4 This is a schematic diagram of the structure of the present invention without the fault monitoring cabinet and the heat dissipation fin state;

[0035] Figure 5 This is a schematic structural diagram of the high-frequency pulse current monitoring mechanism of the present invention in the first state;

[0036] Figure 6 This is a schematic diagram of the structure of the high-frequency pulse current monitoring mechanism of the present invention in the second state;

[0037] Figure 7 For the present invention Figure 6 A schematic diagram of the enlarged structure of part A;

[0038] Figure 8 For the present invention Figure 6 A schematic diagram of the enlarged structure of part B;

[0039] Figure 9 This is a schematic diagram of the front view of the high-frequency pulse current monitoring mechanism of the present invention;

[0040] Figure 10 This is a schematic diagram of the structure of the high-frequency pulse current monitoring mechanism of the present invention in the first state decomposition state;

[0041] Figure 11 This is a schematic diagram of the structure of the No. 1 lifting mechanism of the present invention in an exploded state;

[0042] Figure 12 For the present invention Figure 11Schematic diagram of the enlarged structure of part C therein;

[0043] Figure 13 Schematic diagram of the structure of the first monitoring range adjustment mechanism of the present invention;

[0044] Figure 14 Schematic diagram of the structure of the first lifting component of the present invention;

[0045] Figure 15 Schematic diagram of the structure of the driving mechanism of the present invention;

[0046] Figure 16 Of the present invention Figure 15 Schematic diagram of the enlarged structure of part D therein;

[0047] Figure 17 Schematic diagram of the first disassembled state structure of the second monitoring unit of the present invention;

[0048] Figure 18 Schematic diagram of the second disassembled state structure of the second monitoring unit of the present invention.

[0049] In the figure: 1. Transformer body; 2. Installation groove; 3. High-frequency pulse current monitoring mechanism; 4. Fault monitoring control cabinet; 5. First lifting mechanism; 51. Frame component one; 511. L-shaped support arm one; 512. L-shaped support arm two; 513. First sliding groove; 514. Width expansion arm; 515. Activity cavity; 52. Frame component two; 53. First connection component; 531. Linear support arm; 532. Second sliding groove; 533. Length expansion arm; 54. Second connection component; 6. Second lifting mechanism; 7. First monitoring range adjustment mechanism; 71. Mounting seat; 72. Driving shaft; 73. Micro servo motor; 74. First spiral driving groove; 75. Second spiral driving groove; 76. First lifting component; 761. Sleeve; 762. Extension arm; 763. Mounting sleeve; 764. First driving rod; 77. Second lifting component; 8. Second monitoring range adjustment mechanism; 9. Monitoring data acquisition mechanism; 91. Side plate; 92. Inclined guiding groove; 93. Rack; 94. First monitoring unit; 95. Second monitoring unit; 951. Sliding seat; 952. Cylinder body; 953. Ultrasonic sensor; 954. Transmission shaft; 955. Turbofan; 956. Annular pipe; 957. Dust removal nozzle; 958. Transmission; 959. Gear; 9510. Second driving rod. Detailed implementation manners

[0050] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0051] The present invention provides four technical solutions: an on-line analysis and monitoring device for transformer fault diagnosis, which specifically includes the following embodiments:

[0052] As Figures 1 - 10 The first embodiment is shown: an on-line analysis and monitoring device for transformer fault diagnosis, including a transformer body 1, a fault monitoring control cabinet 4, and heat dissipation fins fixedly arranged on the outer wall of the transformer body 1. An installation groove 2 is formed between the heat dissipation fins and the outer wall of the transformer body 1. It further includes:

[0053] A high-frequency pulse current monitoring mechanism 3, which is arranged inside the installation groove 2 and is movably connected to the outer wall of the transformer body 1, is used to simultaneously obtain acoustic wave signals at multiple positions inside the transformer body 1, and can dynamically change the monitoring position during the process of obtaining acoustic wave data to obtain acoustic wave data at more positions, and accurately locate the occurrence position of the high-frequency pulse current through multiple groups of acoustic wave data;

[0054] The high-frequency pulse current monitoring mechanism 3 includes a first lifting mechanism 5 and a second lifting mechanism 6 arranged parallel up and down. On the left and right sides of the outer walls of the first lifting mechanism 5 and the second lifting mechanism 6, a first monitoring range adjustment mechanism 7 and a second monitoring range adjustment mechanism 8 are respectively arranged for synchronously adjusting the distance between the two. And a plurality of monitoring data acquisition mechanisms 9 are evenly arranged on the front and back sides of the outer walls of the first lifting mechanism 5 and the second lifting mechanism 6. The monitoring data acquisition mechanism 9 continuously adjusts the signal monitoring position during the process of adjusting the distance between the first lifting mechanism 5 and the second lifting mechanism 6;

[0055] The fault monitoring control cabinet 4 is arranged on one side of the transformer body 1, and is used to analyze and judge the monitoring data to locate the occurrence position of the high-frequency pulse current inside the transformer body 1 and mark the fault position.

[0056] As Figures 11 - 12The second embodiment is shown. The structures of the first lifting mechanism 5 and the second lifting mechanism 6 are the same. The first lifting mechanism 5 includes a first frame component 51 and a second frame component 52 which are arranged opposite to each other left and right. The first frame component 51 and the second frame component 52 are connected by a first connecting component 53 and a second connecting component 54. Moreover, the distance between the first frame component 51 and the second frame component 52 can be adjusted by the first connecting component 53 and the second connecting component 54, and the width between the first frame component 51 and the second frame component 52 can be adaptively adjusted according to the size of the transformer.

[0057] The structures of the first frame component 51 and the second frame component 52 are the same. The first frame component 51 includes a first L-shaped support arm 511 and a second L-shaped support arm 512 which are arranged opposite to each other. Chute one 513 is provided at the top of both the first L-shaped support arm 511 and the second L-shaped support arm 512. Moreover, a width expansion arm 514 is fixedly provided at one end of the first L-shaped support arm 511 close to the second L-shaped support arm 512. A first cavity adapted to the structure of the width expansion arm 514 is provided at one end of the second L-shaped support arm 512 close to the first L-shaped support arm 511. The width expansion arm 514 is slidably arranged in the first cavity. Moreover, a scale wire groove one for measuring the length of the part extending out of the first cavity is provided on the outer wall of the width expansion arm 514. A movable cavity 515 is provided at both the chute one 513 and one end of the second L-shaped support arm 512 close to the first connecting component 53 and the second connecting component 54. The width expansion arm 514 and the second L-shaped support arm 512 are locked by a fastening bolt.

[0058] The structures of the first connecting component 53 and the second connecting component 54 are the same. The first connecting component 53 includes a linear support arm 531 and a chute two 532 provided at the top of the linear support arm 531. Moreover, a length expansion arm 533 is fixedly provided at both ends of the linear support arm 531. Scale wire groove two is provided on the outer wall of each length expansion arm 533. A plurality of length expansion arms 533 are slidably arranged in the corresponding movable cavity 515. The movable cavity 515 and the length expansion arm 533 are locked by a fastening bolt.

[0059] As Figures 13 - 14The third implementation manner is shown. The first monitoring range adjustment mechanism 7 includes two mounting seats 71 arranged oppositely up and down. A driving shaft 72 is rotatably arranged between the two mounting seats 71. A micro servo motor 73 is fixedly arranged at the bottom of the lower mounting seat 71. The output shaft of the micro servo motor 73 rotates through the mounting seat 71 and is fixedly connected to the driving shaft 72. Spiral driving grooves 74 and 75 are symmetrically arranged on the upper and lower sides of the outer wall of the driving shaft 72. A first lifting component 76 is slidably arranged in the spiral driving groove 74, and a second lifting component 77 is slidably arranged in the spiral driving groove 75. The spiral driving grooves 74 and 75 can control the first lifting component 76 and the second lifting component 77 to approach or move away from each other synchronously;

[0060] The first lifting component 76 and the second lifting component 77 have the same structure. The first lifting component 76 includes a sleeve 761 and a second cavity opened at one end of the sleeve 761. An extension arm 762 is slidably arranged in the second cavity. Mounting sleeves 763 are fixedly arranged at the ends of the sleeve 761 and the extension arm 762 away from each other. A first driving rod 764 is fixedly arranged on the front surface of the sleeve 761. The two mounting sleeves 763 in the first lifting component 76 are respectively fixedly sleeved on the outer walls of the first L-shaped support arm 511 and the second L-shaped support arm 512 in the first lifting mechanism 5. The two mounting sleeves 763 in the second lifting component 77 are respectively fixedly sleeved on the outer walls of the first L-shaped support arm 511 and the second L-shaped support arm 512 in the second lifting mechanism 6. The two mounting seats 71 are detachably arranged on the outer wall of the transformer body 1 through bolts. The micro servo motors 73 in the first monitoring range adjustment mechanism 7 and the second monitoring range adjustment mechanism 8 are both synchronously controlled to start or stop by the fault monitoring control cabinet 4. The first driving rod 764 is slidably arranged in the corresponding spiral driving groove 74 or spiral driving groove 75;

[0061] As Figures 15 - 18The fourth embodiment is shown. The monitoring data acquisition mechanism 9 includes a side plate 91, and a first driving unit and a second driving unit symmetrically arranged on the upper and lower sides of the outer wall of the side plate 91. A first monitoring unit 94 and a second monitoring unit 95 for monitoring the high-frequency pulse current sound in the transformer body 1 are respectively arranged in the first driving unit and the second driving unit. The side plate 91 is detachably arranged on the inner wall of the installation groove 2. A plurality of monitoring data acquisition mechanisms 9 are respectively slidably arranged in the first sliding groove 513 and the L-shaped support arm 512 in the first connecting component 53, the second connecting component 54, the first frame component 51 and the second frame component 52. The structures of the first driving unit and the second driving unit are the same. The first driving unit includes an inclined guiding groove 92 opened on the outer wall of the side plate 91, and a rack 93 is fixedly arranged on the outer wall of the side plate 91 and on one side of the inclined guiding groove 92. The inclined guiding groove 92 and the rack 93 are arranged in parallel and both form an angle of 45 degrees with the horizontal plane;

[0062] The structures of the first monitoring unit 94 and the second monitoring unit 95 are the same. The first monitoring unit 94 includes a sliding seat 951 and a cylinder body 952 fixedly arranged on the top of the sliding seat 951 through a bracket. A second driving rod 9510 slidably arranged in the inclined guiding groove 92 at the corresponding position is fixedly arranged on the side wall of the sliding seat 951. An ultrasonic sensor 953 is fixedly arranged at one end of the cylinder body 952 close to the transformer body 1. A dust removal component for purging the dust on the outer wall of the transformer body 1 before the ultrasonic sensor 953 monitors data is also arranged inside the cylinder body 952. And a rotary acceleration component for driving the dust removal component to operate is also arranged at one end of the cylinder body 952 away from the ultrasonic sensor 953. The sliding seat 951 is slidably arranged in the first sliding groove 513 or the second sliding groove 532 at the corresponding position in the first lifting mechanism 5. The sliding seat 951 in the first monitoring unit 94 is slidably arranged in the first sliding groove 513 or the second sliding groove 532 at the corresponding position in the second lifting mechanism 6;

[0063] The dust removal component includes a transmission shaft 954 rotatably arranged in the cylinder body 95 by an installation frame. A scroll fan 955 is fixedly arranged at one end of the transmission shaft 954. An annular pipe 956 is fixedly sleeved outside the ultrasonic sensor 953. And dust removal nozzles 957 communicated with the inside thereof are uniformly fixedly arranged on the outer wall of the annular pipe 956. The air outlet ends of the dust removal nozzles 957 are all arranged towards the outer wall of the transformer body 1. The annular pipe 956 and the cylinder body 952 are communicated through a plurality of air pipes for gas transmission. The rotary acceleration component includes a protective cover detachably arranged at one end of the cylinder body 952. A plurality of air inlets are uniformly opened on the outer wall of the protective cover. And a transmission 958 is fixedly arranged on the outer wall of the protective cover away from the cylinder body 952. A gear 959 meshed with the rack 93 at the corresponding position is fixedly arranged on the input shaft of the transmission 958. And the output shaft of the transmission 958 rotates through the protective cover and is connected with the transmission shaft 954.

[0064] An embodiment of the present invention further provides an on-line analysis and monitoring method for transformer fault diagnosis, which is used for an on-line analysis and monitoring device for transformer fault diagnosis. The method includes the following steps:

[0065] Step 1: The controller inside the fault monitoring control cabinet 4 simultaneously controls the monitoring data acquisition mechanisms 9 at multiple positions to monitor the sounds emitted by high-frequency pulse currents at corresponding positions inside the transformer body 1, and simultaneously acquires multiple monitoring data at different positions inside the transformer body 1;

[0066] The specific process is as follows: When monitoring the internal insulation fault of the transformer body 1, the monitoring ends of the ultrasonic sensors 953 in the monitoring data acquisition mechanisms 9 at multiple positions are closely attached to the outer wall of the transformer body 1. The ultrasonic sensors 953 monitor and capture the sound data inside the transformer body 1 at the corresponding positions in the initial position, and the sound data is recorded in the memory inside the fault monitoring control cabinet 4;

[0067] The fault monitoring control cabinet 4 continues to control the micro servo motors 73 in the first monitoring range regulating mechanism 7 and the second monitoring range regulating mechanism 8 to rotate forward or backward at a fixed low speed for a fixed time according to the preset program 1. The drive shaft 72 rotates under the drive of the micro servo motor 73. Since the first drive rods 764 in the first lifting assembly 76 and the second lifting assembly 77 are respectively slidably arranged in the corresponding spiral drive grooves 74 and 75 at corresponding positions, the first lifting assembly 76 and the second lifting assembly 77 approach or move away from each other synchronously. And because the two mounting sleeves 763 in the first lifting assembly 76 are fixedly sleeved on the outer walls of the L-shaped support arms 511 and 512 in the first lifting mechanism 5, and the two mounting sleeves 763 in the second lifting assembly 77 are respectively fixedly sleeved on the outer walls of the L-shaped support arms 511 and 512 in the second lifting mechanism 6. When the first lifting assembly 76 and the second lifting assembly 77 approach or move away from each other synchronously, the first lifting mechanism 5 and the second lifting mechanism 6 also move synchronously with the first lifting assembly 76 and the second lifting assembly 77. At the same time, since the sliding seats 951 in the first monitoring unit 94 and the second monitoring unit 95 in the multiple monitoring data acquisition mechanisms 9 are respectively slidably arranged in the corresponding chutes 513 or chutes 532 at corresponding positions, and the second drive rod 9510 is slidably arranged in the corresponding inclined guide groove 92. When the first lifting assembly 76 and the second lifting assembly 77 approach or move away from each other synchronously, the second drive rod 9510 slides along the track of the inclined guide groove 92 at the corresponding position, so that the adjacent first monitoring unit 94 and the second monitoring unit 95 change their horizontal and vertical positions simultaneously. After the operation time of the micro servo motor 73 according to the preset program 1 ends, the first monitoring unit 94 and the second monitoring unit 95 in the multiple monitoring data acquisition mechanisms 9 reach new monitoring positions, and the ultrasonic sensors 953 in the first monitoring unit 94 and the second monitoring unit 95 monitor the high-frequency pulse current sound inside the transformer body 1 again at the new positions;

[0068] While the first lifting mechanism 5 and the second lifting mechanism 6 are moving, the gear 959 rotates driven by the rack 93. The low-speed power is accelerated by the transmission 958 and then outputs high-speed rotating power. This high-speed rotating power drives the scroll fan 955 to rotate through the transmission shaft 954. External air enters the cylinder body 952 through the air inlet on the protective cover under the suction of the scroll fan 955. The air enters the annular pipe 956 through multiple air pipes and is blown to the outer wall of the transformer body 1 through multiple dust removal nozzles 957. The dust attached to the outer wall of the transformer body 1 is swept off to prevent the dust from interfering with the signal capture process of the ultrasonic sensor 953.

[0069] Step 2: The first monitoring range adjustment mechanism 7 and the second monitoring range adjustment mechanism 8 simultaneously drive the first lifting mechanism 5 and the second lifting mechanism 6 to move away from or close to each other, and the monitoring data acquisition mechanisms 9 at multiple positions simultaneously change the monitoring positions of the transformer body 1, and capture new high-frequency pulse current sound data again after reaching the preset positions;

[0070] Step 3: The fault monitoring control cabinet 4 analyzes and judges the captured multiple high-frequency pulse current sound data, and comprehensively judges the position where the high-frequency pulse current occurs according to the analysis results to determine the internal insulation fault position of the transformer body 1.

[0071] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprises", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0072] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An on-line analysis and monitoring device for transformer fault diagnosis, comprising a transformer body, a fault monitoring control cabinet, and heat dissipation fins fixedly arranged on the outer wall of the transformer body. An installation groove is formed between the heat dissipation fins and the outer wall of the transformer body. It is characterized in that, Further comprising: A high-frequency pulse current monitoring mechanism, which is arranged inside the installation groove and movably connected to the outer wall of the transformer body relatively, is used to simultaneously obtain acoustic signals at multiple positions inside the transformer body, and can dynamically change the monitoring position during the process of obtaining acoustic data, so as to obtain acoustic data at more positions, and accurately locate the occurrence position of the high-frequency pulse current through multiple groups of acoustic data; The high-frequency pulse current monitoring mechanism includes a first lifting mechanism and a second lifting mechanism arranged in parallel up and down. On the left and right sides of the outer walls of the first lifting mechanism and the second lifting mechanism, there are respectively arranged a first monitoring range regulating mechanism and a second monitoring range regulating mechanism for synchronously regulating the distance between the two. And on the front and back sides of the outer walls of the first lifting mechanism and the second lifting mechanism, a plurality of monitoring data acquisition mechanisms are evenly arranged. The monitoring data acquisition mechanism continuously adjusts the signal monitoring position during the process of regulating the distance between the first lifting mechanism and the second lifting mechanism; The monitoring data acquisition mechanism includes a side plate and a first driving unit and a second driving unit symmetrically arranged on the upper and lower sides of the outer wall of the side plate. Inside the first driving unit and the second driving unit, there are respectively arranged a first monitoring unit and a second monitoring unit for monitoring the sound of the high-frequency pulse current inside the transformer body; The first driving unit and the second driving unit have the same structure. The first driving unit includes an inclined guiding groove opened on the outer wall of the side plate, and a rack is fixedly arranged on the outer wall of the side plate and on one side of the inclined guiding groove. The inclined guiding groove and the rack are arranged in parallel; The first monitoring unit and the second monitoring unit have the same structure. The first monitoring unit includes a sliding seat and a cylinder body fixedly arranged on the top of the sliding seat through a bracket. On the side wall of the sliding seat, a second driving rod slidably arranged in the inclined guiding groove at the corresponding position is fixedly arranged. At one end of the cylinder body close to the transformer body, an ultrasonic sensor is fixedly arranged. Inside the cylinder body, there is also arranged a dust removal component for blowing the dust on the outer wall of the transformer body before the ultrasonic sensor monitors data. And at one end of the cylinder body far from the ultrasonic sensor, there is also arranged a rotation acceleration component for driving the operation of the dust removal component; 2. An on-line analysis and monitoring device for transformer fault diagnosis according to claim 1, characterized in that: The first lifting mechanism and the second lifting mechanism have the same structure. The first lifting mechanism includes a first frame assembly and a second frame assembly arranged opposite to each other left and right. The first frame assembly and the second frame assembly are connected through a first connecting component and a second connecting component. And the distance between the first frame assembly and the second frame assembly can be adjusted through the first connecting component and the second connecting component. The width between the first frame assembly and the second frame assembly can be adaptively adjusted according to the size of the transformer; The structures of the first frame component and the second frame component are the same. The first frame component includes an L-shaped support arm one and an L-shaped support arm two which are oppositely arranged. The tops of the L-shaped support arm one and the L-shaped support arm two are both provided with a first chute. And one end of the L-shaped support arm one close to the L-shaped support arm two is fixedly provided with a width expansion arm. A first cavity adapted to the structure of the width expansion arm is provided at one end of the L-shaped support arm two close to the L-shaped support arm one. The width expansion arm is slidably arranged in the first cavity. And a scale wire groove one for measuring the length of the part extending out of the first cavity is provided on the outer wall of the width expansion arm. A movable cavity is provided at each of the first chute and one end of the L-shaped support arm two close to the first connection component and the second connection component. The width expansion arm and the L-shaped support arm two are locked by a fastening bolt.

3. The on-line analysis and monitoring device for transformer fault diagnosis according to claim 2, wherein: The structures of the first connection component and the second connection component are the same. The first connection component includes a linear support arm and a second chute provided at the top of the linear support arm. And a length expansion arm is fixedly provided at each end of the linear support arm. A scale wire groove two is provided on the outer wall of each length expansion arm. A plurality of length expansion arms are slidably arranged in the movable cavities at corresponding positions. The movable cavity and the length expansion arm are locked by a fastening bolt.

4. An on-line analysis and monitoring device for transformer fault diagnosis according to claim 1, characterized in that: The first monitoring range regulating mechanism includes two mounting seats arranged oppositely up and down. A driving shaft is rotatably arranged between the two mounting seats. A micro servo motor is fixedly provided at the bottom of the lower mounting seat. The output shaft of the micro servo motor rotates through the mounting seat and is fixedly connected to the driving shaft. A spiral driving groove one and a spiral driving groove two are symmetrically provided on the upper and lower sides of the outer wall of the driving shaft. A first lifting component is slidably arranged in the spiral driving groove one. A second lifting component is slidably arranged in the spiral driving groove two.

5. An on-line analysis and monitoring device for transformer fault diagnosis according to claim 4, characterized in that: The structures of the first lifting component and the second lifting component are the same. The first lifting component includes a sleeve and a second cavity provided at one end of the sleeve. An extension arm is slidably arranged in the second cavity. And mounting sleeves are fixedly provided at the ends of the sleeve and the extension arm away from each other. A first driving rod is fixedly provided on the front surface of the sleeve.

6. The on-line analysis and monitoring device for transformer fault diagnosis according to claim 1, characterized in that: The dust removal component includes a transmission shaft rotatably arranged in the cylinder body through a mounting frame. A scroll fan is fixedly provided at one end of the transmission shaft. An annular pipe is fixedly sleeved outside the ultrasonic sensor. And dust removal nozzles communicated with the inside thereof are uniformly fixedly provided on the outer wall of the annular pipe. The rotation acceleration component includes a protective cover detachably arranged at one end of the cylinder body. A plurality of air inlets are uniformly provided on the outer wall of the protective cover. And a transmission is fixedly provided on the outer wall of the protective cover away from the cylinder body. A gear meshed with the rack at the corresponding position is fixedly provided on the input shaft of the transmission. And the output shaft of the transmission rotates through the protective cover and is connected to the transmission shaft.

7. An on-line analysis and monitoring method for transformer fault diagnosis, characterized in that: For the on-line analysis and monitoring device for transformer fault diagnosis as described in any one of claims 1-6, the method includes the following steps: Step 1: The controller inside the fault monitoring control cabinet simultaneously controls the monitoring data acquisition mechanisms at multiple positions to monitor the sounds emitted by high-frequency pulse currents at corresponding positions inside the transformer body, and simultaneously obtains multiple monitoring data at different positions inside the transformer body; Step 2: The first monitoring range adjustment mechanism and the second monitoring range adjustment mechanism simultaneously drive the first lifting mechanism and the second lifting mechanism to move away from or close to each other. The monitoring data acquisition mechanisms at multiple positions simultaneously change the monitoring positions of the transformer body, and capture new high-frequency pulse current sound data again after reaching the preset positions; Step 3: The fault monitoring control cabinet analyzes and judges the captured multiple high-frequency pulse current sound data, and comprehensively judges the position where the high-frequency pulse current occurs according to the analysis results to determine the insulation fault position inside the transformer body.

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