CN118191532A - Transformer partial discharge measuring device - Google Patents
Transformer partial discharge measuring device Download PDFInfo
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- CN118191532A CN118191532A CN202410493592.9A CN202410493592A CN118191532A CN 118191532 A CN118191532 A CN 118191532A CN 202410493592 A CN202410493592 A CN 202410493592A CN 118191532 A CN118191532 A CN 118191532A
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- 238000001514 detection method Methods 0.000 claims abstract description 49
- 238000012544 monitoring process Methods 0.000 claims abstract description 36
- 230000007246 mechanism Effects 0.000 claims abstract description 33
- 230000005540 biological transmission Effects 0.000 claims abstract description 26
- 238000005259 measurement Methods 0.000 claims abstract description 25
- 238000004804 winding Methods 0.000 claims abstract description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 239000006260 foam Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 22
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 230000001960 triggered effect Effects 0.000 abstract description 4
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- 230000007547 defect Effects 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 10
- 238000013461 design Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 230000009471 action Effects 0.000 description 4
- 230000003139 buffering effect Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
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- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
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- 230000002349 favourable effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
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- 230000009975 flexible effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1209—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using acoustic measurements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention provides a transformer partial discharge measuring device, and belongs to the technical field of electric variable measurement. The invention comprises a transformer body, a built-in coil winding and a transformer oil circulation mechanism arranged around the coil winding, wherein an alarm is fixedly arranged on the side wall of the transformer body, and the invention further comprises: the transmission detection assembly, the hydraulic driving assembly and the plug flow sound absorption assembly; the partial discharge phenomenon and the surface condition of the insulating layer can be dynamically monitored through the monitoring sensor and the detection mechanism, so that the detection accuracy of the partial discharge phenomenon is greatly improved, potential faults can be timely found and an audible and visual alarm system is triggered, and early intervention of staff is allowed; dynamic rotation of the detection mechanism is driven by converting flow energy of transformer oil into mechanical energy, and micro-shaking of the buffer spring and accurate positioning of the positioning magnetic block are utilized, so that coverage and sensitivity of the detection mechanism to the surface condition of the insulating layer are effectively improved, potential defects are positioned, and the possibility of missing detection and false detection is reduced.
Description
Technical Field
The invention relates to the technical field of electric variable measurement, in particular to a transformer partial discharge measurement device.
Background
Transformers are common key equipment in power systems and mainly play roles in voltage conversion and power transmission. However, during its operation, problems may be encountered, one of which is partial discharge. Partial discharge generally occurs in certain localized areas of the transformer insulator, and when the field strength of these areas exceeds the breakdown field strength of the local dielectric, a discharge phenomenon occurs. This phenomenon has a significant impact on the performance and insulation of the transformer. In particular, even weak partial discharges can cause corrosion to the insulating material, and long-term partial discharges can gradually weaken the dielectric electrical strength of the medium until final breakdown, causing breakdown of the device.
In the prior art, monitoring of partial discharge phenomenon of a transformer is mainly performed by a monitor at present, because the internal structure of the transformer is complex, the sensor may not completely cover all potential discharge areas, which may cause that some partial discharge phenomenon cannot be detected in time, the risk of operation of the transformer is increased, and because of various factors such as electromagnetic interference and mechanical vibration in the transformer, the noise is generated, the noise can interfere with signal acquisition and processing of the sensor, and false alarm or missing alarm is caused, so that the monitoring accuracy of the monitoring sensor is affected; in addition, in the prior art, real-time monitoring is difficult to be performed on the broken part of the winding insulating layer, and when the insulating layer is broken but the partial discharge phenomenon is not generated, if the partial discharge phenomenon cannot be found in time, the risk of partial discharge of the transformer is increased, and more serious faults can be caused.
How to invent a partial discharge measuring device for a transformer to improve the problems becomes a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In order to remedy the above-mentioned drawbacks, the present invention provides a transformer partial discharge measurement device aimed at improving the problems mentioned in the background above.
The invention is realized in the following way:
The invention provides a transformer partial discharge measuring device, which comprises a transformer body, a built-in coil winding and a transformer oil circulation mechanism arranged around the coil winding, wherein an alarm is fixedly arranged on the side wall of the transformer body, an insulating layer is arranged outside the coil winding, a plurality of through flow pipes arranged inside the insulating layer are arranged on the transformer oil circulation mechanism, and the transformer partial discharge measuring device further comprises:
Transmission detection assembly: the transmission detection assembly is arranged in the transformer body and is used for monitoring partial discharge phenomenon and the surface of the insulating layer in real time;
Hydraulic drive assembly: the hydraulic driving assembly is arranged in the draft tube and is used for driving the transmission detection assembly to move;
Plug flow sound absorbing assembly: the plug flow sound-absorbing assembly is arranged around the insulating layer and is used for reducing noise generated when partial discharge occurs at the insulating layer and pushing and guiding transformer oil.
Preferably, the hydraulic driving assembly comprises a limiting frame fixedly connected with the inside of the draft tube, a transmission shaft is rotatably connected with the inside of the limiting frame, a flow guiding piece is fixedly connected with the top end of the transmission shaft, an impact fan blade is fixedly connected with the transmission shaft between the flow guiding piece and the limiting frame, and a strong magnetic disk is fixedly connected with the top of the flow guiding piece.
Preferably, the strong magnetic disk is rotationally connected with the inner wall of the draft tube, a channel is arranged in the strong magnetic disk, the guide piece is in through connection with the inner cavity of the strong magnetic disk, a plurality of through holes are formed in the side wall of the guide piece in an annular mode, the through holes penetrate through the side wall of the guide piece, the guide piece is in a hollow round table-shaped inverted arrangement, and the impact fan blade is arranged by inclined light materials.
Preferably, the transmission detection assembly comprises a detection mechanism, a limiting magnetic ring and a buffering spring, wherein the buffering spring and the limiting magnetic ring are both sleeved on the outer side of the draft tube in a sliding manner, the limiting magnetic ring is positioned right above the buffering spring, a plurality of L-shaped supporting rods are fixedly connected to the edge of the limiting magnetic ring in an annular shape, and mounting rods are fixedly connected to the side walls of the L-shaped supporting rods, facing the insulating layer.
Preferably, the detection mechanism comprises a monitoring sensor fixedly connected with the side wall of the L-shaped supporting rod and a U-shaped frame fixedly connected with the end part of the mounting rod, the mounting clamping plate is mounted in the U-shaped frame in a clamping manner, a plurality of piston cavities are formed in the mounting clamping plate, a piston rod is arranged in the piston cavities in a sliding manner in a sealing manner, a pressing spring is fixedly connected with the bottom wall of the piston cavity, the end part of the pressing spring is fixedly connected with the upper side wall of the piston rod, the lower end of the piston rod extends to the outer side of the mounting clamping plate and the end part of the piston rod is provided with balls in a rotating manner, the upper end of the piston rod is fixedly connected with a connecting rod, the end part of the connecting rod extends to the outer side of the mounting clamping plate and the U-shaped frame and is fixedly connected with a positioning magnetic block, through holes matched with the outer diameters of the connecting rod are formed in the U-shaped frame and the mounting clamping plate, the pressing spring is sleeved on the outer side of the connecting rod in a sliding manner, and a plurality of limiting cavities and triggering chambers are formed in the U-shaped frame.
Preferably, the spacing chamber and the location magnetic path each other are the matching type setting, trigger the upper side wall fixedly connected with reset spring of room, reset spring's tip fixedly connected with triggers the magnetic path, trigger magnetic path sliding connection in triggering the indoor portion, trigger the lower lateral wall fixedly connected with alarm switch of room, electric connection between alarm switch, monitoring sensor and the siren, monitoring sensor's the outside is equipped with waterproof coating.
Preferably, the positioning magnetic block and the triggering magnetic block are arranged in different magnetic modes, the magnetic force between the opposite surfaces of the positioning magnetic block and the triggering magnetic block is larger than the elastic force of the reset spring, the height of the strong magnetic disk is larger than that of the limiting magnetic ring, the strong magnetic disk and the limiting magnetic ring are arranged in different magnetic modes, and gaps are reserved between the U-shaped frame and the mounting clamping plate and between the L-shaped supporting rod and the U-shaped frame.
Preferably, the plug-flow sound-absorbing assembly comprises a plurality of groups of sound-absorbing passages and a plurality of flow-guiding branches, wherein the plurality of groups of sound-absorbing passages and the flow-guiding branches are arranged in the installation clamping plate, the plurality of sound-absorbing passages are arranged on the installation clamping plate between two adjacent piston cavities, and the flow-guiding branches respectively penetrate through the two piston cavities and the plurality of sound-absorbing passages.
Preferably, the section of the sound absorbing passage is curved, the distance between the ports of two adjacent sound absorbing passages is small and large, and the inner wall of the sound absorbing passage is provided with an aluminum foam layer.
The beneficial effects of the invention are as follows:
The partial discharge phenomenon and the surface condition of the insulating layer can be dynamically monitored through the monitoring sensor and the detection mechanism, so that the detection accuracy of the partial discharge phenomenon is greatly improved, potential faults can be timely found and an audible and visual alarm system is triggered, and workers are allowed to perform early intervention, so that the requirement for shutdown maintenance and the maintenance cost are reduced, and meanwhile, the operation safety and reliability of the transformer are improved; the dynamic rotation of the detection mechanism is driven by converting the flowing energy of the transformer oil into mechanical energy, the design not only improves the energy utilization efficiency, but also increases the detection coverage and accuracy through dynamic monitoring, and the coverage and sensitivity of the detection mechanism to the surface condition of the insulating layer are effectively improved by utilizing a fine adjustment mechanism (such as micro-jitter of a buffer spring) and the accurate positioning of the positioning magnetic block, so that the design is favorable for accurately identifying and positioning potential defects and reducing the possibility of missed detection and false detection;
through the dynamic rotation of detection mechanism and the flexible action of piston rod, promote transformer oil to flow in the transformer inside, guide a part of transformer oil through inhaling sound passageway and water conservancy diversion branch road and get into the piston intracavity, the pressure in the piston intracavity is along with the piston rod influence, effectively absorb and disperse sound wave energy through inhaling the aluminium foam layer in the sound passageway in this process, effectively reduced the influence of the sound wave that partial discharge produced to monitoring sensor detection precision, help improving monitoring system's response sensitivity and degree of accuracy to real fault signal, utilize the sound wave absorption characteristic of flowing transformer oil to further reduce this kind of interference simultaneously, thereby improve monitoring precision.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a cross-sectional structure of a transformer body of a transformer partial discharge measurement device according to an embodiment of the present invention;
Fig. 2 is a schematic diagram of the overall structure of a partial discharge measurement device of a transformer according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an internal structure of a partial discharge measurement device of a transformer according to an embodiment of the present invention;
fig. 4 is a schematic top view of an internal structure of a partial discharge measurement device of a transformer according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a cross-sectional structure of a transformer oil circulation structure of a partial discharge measurement device for a transformer according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a cross-sectional structure of an insulating layer of a partial discharge measurement device of a transformer according to an embodiment of the present invention;
fig. 7 is an enlarged schematic view of a partial discharge measurement device a of a transformer according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a cross-sectional structure of a mounting board and a draft tube of a transformer partial discharge measuring device according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of the internal structure of a mounting clip and a U-shaped frame of a transformer partial discharge measurement device according to an embodiment of the present invention;
FIG. 10 is a schematic diagram of a detection mechanism of a partial discharge measurement device for a transformer according to an embodiment of the present invention;
Fig. 11 is an enlarged schematic view of a partial discharge measurement device B of a transformer according to an embodiment of the present invention;
Fig. 12 is a schematic structural diagram of a hydraulic driving assembly of a transformer partial discharge measurement device according to an embodiment of the present invention.
In the figure: 1. a transformer body; 2. an insulating layer; 3. a transformer oil circulation mechanism; 4. an L-shaped strut; 5. a strong magnetic disk; 6. a piston rod; 7. a mounting rod; 8. a U-shaped frame; 9. installing a clamping plate; 10. monitoring a sensor; 11. a buffer spring; 12. an alarm; 301. a draft tube; 401. a limit magnetic ring; 501. a flow guide; 502. a transmission shaft; 503. impact fan blades; 504. a limiting frame; 601. a connecting rod; 602. positioning a magnetic block; 603. pressing the spring; 604. a ball; 801. a spacing cavity; 802. a trigger chamber; 803. a return spring; 804. triggering the magnetic block; 805. an alarm switch; 901. a sound absorbing passage; 902. a diversion branch.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
Referring to fig. 1-5, an embodiment, a transformer partial discharge measurement device, including a transformer body 1, a built-in coil winding thereof, and a transformer oil circulation mechanism 3 disposed around the coil winding, for cooling circulating transformer oil, wherein an alarm 12 is fixedly disposed on a side wall of the transformer body 1, an insulating layer 2 is disposed outside the coil winding, a plurality of through-flow pipes 301 disposed inside the insulating layer 2 are disposed on the transformer oil circulation mechanism 3, for cooling the inside of the insulating layer 2, and further including:
transmission detection assembly: the transmission detection assembly is arranged in the transformer body 1 and is used for monitoring the partial discharge phenomenon and the surface of the insulating layer 2 in real time;
Hydraulic drive assembly: the hydraulic driving component is arranged in the draft tube 301 and is used for driving the transmission detection component to move;
Plug flow sound absorbing assembly: the plug flow sound-absorbing component is arranged around the insulating layer 2 and is used for reducing noise generated when partial discharge occurs at the insulating layer 2 and pushing and guiding transformer oil;
Further, the hydraulic driving assembly comprises a limiting frame 504 fixedly connected with the inside of the draft tube 301, a transmission shaft 502 is rotatably connected with the inside of the limiting frame 504, the transmission shaft 502 is limited through the limiting frame 504, a guide piece 501 is fixedly connected to the top end of the transmission shaft 502, an impact fan blade 503 is fixedly connected to the transmission shaft 502 between the guide piece 501 and the limiting frame 504, and a strong magnetic disk 5 is fixedly connected to the top of the guide piece 501;
It should be noted that: the strong magnetic disk 5 is rotationally connected with the inner wall of the draft tube 301, a channel is arranged in the strong magnetic disk 5, the draft tube 501 is in through connection with the inner cavity of the strong magnetic disk 5, the side wall of the draft tube 501 is provided with a plurality of through flow openings in a ring shape, the through flow openings penetrate through the side wall of the draft tube 501, a part of cooled transformer oil flows into the draft tube 301 through the transformer oil circulation mechanism 3 so as to realize cooling treatment in the insulating layer 2, the draft tube 501 is in a reverse hollow round table shape, transformer oil is favorably guided to pass through the draft tube 301 in a specific flow path, the design can increase the impact force of the transformer oil on the impact fan blades 503, so that the driving efficiency is improved, the impact fan blades 503 are in an inclined light material, the rotation dynamics performance under the impact of the transformer oil is optimized, the design not only reduces the rotation inertia, but also improves the response speed and the driving efficiency, the transformer oil entering the draft tube 301 can pass through the strong magnetic disk 5 and the draft tube 501, and finally flows downwards through the through flow openings, the transformer oil can impact the impact fan blades 503 in the flowing process, the transformer oil can be impacted by the impact fan blades 503, the transformer oil can be effectively converted into the energy to be impacted by the mechanical impact fan blades to rotate in the magnetic disk 502 under the impact force to drive the impact fan blades 502;
Referring to fig. 6-12, the transmission detection assembly includes a detection mechanism, a limit magnetic ring 401 and a buffer spring 11, where the detection mechanism is used to monitor the surface of the insulating layer 2 and monitor the partial discharge phenomenon inside the transformer body 1 in real time, the buffer spring 11 and the limit magnetic ring 401 are both slidingly sleeved on the outer side of the draft tube 301, the limit magnetic ring 401 is located right above the buffer spring 11, the edge of the limit magnetic ring 401 is annular and fixedly connected with a plurality of L-shaped struts 4, and the side wall of the L-shaped strut 4 facing the insulating layer 2 is fixedly connected with a mounting rod 7;
Further, the detection mechanism comprises a monitoring sensor 10 fixedly connected with the side wall of the L-shaped supporting rod 4 and a U-shaped frame 8,U fixedly connected with the end part of the mounting rod 7, a mounting clamping plate 9 is mounted in a clamping manner in the U-shaped frame 8,U, a plurality of piston cavities are arranged in the mounting clamping plate 9, piston rods 6 are arranged in the piston cavities in a sealing sliding manner, a pressing spring 603 is fixedly connected with the bottom wall of each piston cavity, the end part of each pressing spring 603 is fixedly connected with the upper side wall of each piston rod 6, the lower end of each piston rod 6 extends to the outer side of the corresponding mounting clamping plate 9, the end part of each piston rod 6 is rotatably provided with a ball 604, a connecting rod 601 is fixedly connected with the upper end of each piston rod 6, the end part of each connecting rod 601 extends to the outer sides of the corresponding mounting clamping plate 9 and the U-shaped frame 8, through holes matched with the outer diameters of the connecting rod 601 are formed in the U-shaped frame 8 and the mounting clamping plate 9, the pressing spring 603 is sleeved on the outer side of the connecting rod 601 in a sliding manner, and a plurality of limiting cavities 801 and trigger chambers 802 are formed in the U-shaped frame 8;
The limiting cavity 801 and the positioning magnetic block 602 are arranged in a matched mode, the positioning magnetic block 602 can be limited through the limiting cavity 801, the upper side wall of the triggering chamber 802 is fixedly connected with a reset spring 803, the end part of the reset spring 803 is fixedly connected with a triggering magnetic block 804, the triggering magnetic block 804 is slidably connected inside the triggering chamber 802, the lower side wall of the triggering chamber 802 is fixedly connected with an alarm switch 805, the monitoring sensor 10 and the alarm 12 are electrically connected, when the alarm switch 805 is triggered or the monitoring sensor 10 detects a partial discharge phenomenon, the alarm 12 can give an alarm to inform staff, the outer side of the monitoring sensor 10 is provided with a waterproof coating, normal operation of the monitoring sensor 10 can be ensured, and the partial discharge phenomenon can be monitored through the monitoring sensor 10;
It should be noted that: the positioning magnetic block 602 and the triggering magnetic block 804 are in different magnetic settings, the magnetic force between the opposite surfaces of the positioning magnetic block 602 and the triggering magnetic block 804 is larger than the elastic force of the reset spring 803, when the positioning magnetic block 602 moves into the limiting cavity 801, the triggering magnetic block 804 stretches the reset spring 803 and finally contacts with the alarm switch 805 under the driving of the magnetic force, the height of the strong magnetic disk 5 is larger than that of the limiting magnetic ring 401, the strong magnetic disk 5 and the limiting magnetic ring 401 are in different magnetic settings, when the strong magnetic disk 5 rotates, the limiting magnetic ring 401 also drives the L-shaped supporting rod 4 to rotate around the draft tube 301 under the driving of the magnetic force, and then the monitoring sensor 10 and the installation clamping plate 9 can be driven to rotate, so that the inside of the transformer can be dynamically monitored, the design makes the monitoring process more comprehensive, the coverage and the accuracy of detection are improved, and because the buffer spring 11 is arranged between the lower part of the limiting magnetic ring 401 and the upper surface of the insulating layer 2, the detection mechanism is allowed to generate small-amplitude shaking in the rotating process, the whole coverage of the outer surface of the insulating layer 2 is facilitated, and through the fine adjustment of the detection accuracy and the detection accuracy can be improved, the gap between the U-shaped supporting rod 4 and the U-shaped supporting rod 8 can be prevented from being installed, and the U-shaped supporting rod 8 can be installed between the U-shaped supporting rod 8 and the U-shaped supporting rod 8;
Further, the plug-flow sound-absorbing assembly comprises a plurality of groups of sound-absorbing passages 901 and flow-guiding branches 902 which are arranged in the mounting clamping plate 9, a plurality of sound-absorbing passages 901 are arranged on the mounting clamping plate 9 between two adjacent piston cavities, the flow-guiding branches 902 respectively penetrate through the two piston cavities and the plurality of sound-absorbing passages 901, when the detection mechanism rotates, a small part of transformer oil enters the interior of the piston cavities through the sound-absorbing passages 901 and the flow-guiding branches 902, when encountering the connection position of the surface of the insulating layer 2, the piston rod 6 stretches out and contracts after the piston rod 6 under the action of the elasticity of the abutting spring 603, the action of the piston rod 6 can promote the flow of transformer oil in the piston cavities, ensure that oil can flow in the whole system more effectively, when a partial discharge phenomenon occurs, sound waves with specific frequencies can be generated, the sound waves possibly interfere with the detection precision of the monitoring sensor 10 when the sound waves propagate in the transformer oil, and a part of transformer oil is guided into the piston cavities through the passages 901 and the flow-guiding branches 902, the interference can be reduced by utilizing the sound wave absorption characteristics of the flowing transformer oil, so that the precision is improved;
It should be noted that: the cross section of the sound absorption passage 901 is in a curve shape, compared with a straight-line cross section, the length of a propagation path of sound waves in the passage can be increased, so that the time and the area of contact of the sound waves with materials can be increased, the absorption efficiency of the sound waves are improved, the distance between the ports of two adjacent sound absorption passages 901 is in a small-before-large shape, the arrangement of the ports with the small distance before the large distance can help to concentrate sound wave energy in the initial stage of sound absorption, the probability of the sound waves entering the sound absorption passage 901 is increased, when the sound waves further propagate, the larger port distance is favorable for the diffusion and absorption of the sound waves, the sound wave reflection and interference are reduced, the sound absorption effect is improved, the inner wall of the sound absorption passage 901 is provided with an aluminum foam layer, the aluminum foam has excellent performance in terms of absorbing the sound waves, the sound wave energy can be effectively absorbed and dispersed, the strength of the sound waves is reduced, the aluminum foam has good corrosion resistance and chemical stability, and is suitable for being used in special environments such as transformer oil, and the long-term stable operation of the system is ensured.
The working principle of the transformer partial discharge measuring device is as follows: the transformer oil after cooling can be conveyed into the transformer oil circulation mechanism 3 through an external cooling mechanism (a cooling machine, a circulation pipeline and a circulation pump are not shown in the drawing), part of the transformer oil after cooling can flow into the through flow pipe 301 through the transformer oil circulation mechanism 3 so as to realize cooling treatment in the insulating layer 2, the flow guide piece 501 is in a shape of a hollow round table which is inverted, so that the transformer oil can be guided to pass through the through flow pipe 301 through a specific flow path, the design can increase the impact force of the transformer oil on the impact fan blades 503, the driving efficiency is improved, the impact fan blades 503 are arranged by inclined light materials, the rotation dynamics performance of the transformer oil under the impact is optimized, the design not only reduces the rotation inertia, but also improves the response speed and the driving efficiency, the transformer oil entering into the through flow pipe 301 can pass through the strong magnetic disk 5 and the flow guide piece 501 and finally flows downwards through the flow guide piece, the transformer oil can impact the impact fan blades 503 in the flowing process, and through the design, the flow energy of the transformer oil can be effectively converted into mechanical energy of the impact fan blades 503 at the moment, the impact fan blades 503 can drive the transmission shaft 502 to rotate under the impact of the transformer oil so as to drive the strong magnetic disk 502 to rotate under the impact of the transformer oil so as to drive the magnetic disk 502 to rotate under the strong magnetic disk 301;
Because the height of the strong magnetic disk 5 is larger than that of the limit magnetic ring 401, the strong magnetic disk 5 and the limit magnetic ring 401 are in different magnetic settings, when the strong magnetic disk 5 rotates, the limit magnetic ring 401 drives the L-shaped supporting rod 4 to rotate around the through flow pipe 301 under the driving of magnetic force, so that the monitoring sensor 10 and the mounting clamping plate 9 can be driven to rotate, and the inside of the transformer can be dynamically monitored, the design ensures that the monitoring process is more comprehensive, the coverage and the accuracy of the detection are improved, and because the buffer spring 11 is arranged between the lower part of the limit magnetic ring 401 and the upper surface of the insulating layer 2, the detection mechanism is allowed to generate small-amplitude shaking in the rotating process, the whole coverage of the outer surface of the insulating layer 2 is facilitated, and through the fine adjustment, the sensitivity and the accuracy of the detection can be improved, the omission detection can be avoided, gaps exist between the U-shaped frame 8 and the mounting clamping plate 9, and the L-shaped supporting rod 4 can flow in the transformer, the transformer oil can flow in the gaps, the inside the transformer can be improved in the transformer during the rotation, the cooling efficiency of the transformer is enhanced, the cooling efficiency of the transformer is further, the heat source of the transformer is further evenly distributed from the transformer to the position of the heat source, the whole transformer can be evenly distributed, the heat source is reduced, the service life of the transformer is reduced, and the service life of the transformer is prolonged;
When the detection mechanism rotates, the piston rod 6 drives the ball 604 to rotate along the surface of the insulating layer 2, the process is synchronously carried out along with small jitter, the piston rod 6 can be ensured to detect at different vertical layers of the insulating layer 2, when the piston rod 6 moves to a larger sunken position (refer to fig. 10-11), the piston rod 6 drives the ball 604 to slide to the bottom of the sunken position, at the moment, under the drive of the pressing spring 603, the piston rod 6 drives the connecting rod 601 and the positioning magnet 602 to move downwards, when the positioning magnet 602 moves into the limiting cavity 801, under the drive of magnetic force, the triggering magnet 804 stretches the reset spring 803 and finally contacts with the alarm switch 805, and because the alarm switch 805, the monitoring sensor 10 and the alarm 12 are electrically connected, when the alarm switch 805 is triggered or the monitoring sensor 10 detects partial discharge phenomenon, the alarm 12 can send out an audible and visual signal to warn staff, and the circulating pump is controlled by the system to stop working, thereby the positioning damaged area is convenient for the staff to stop the insulating layer 2, when the insulating layer 2 is damaged, but the partial discharge accident can not be found out in advance, and the accident can be prevented from happening in time, and the accident can be caused by the serious accident is more serious and the accident is detected;
When the detection mechanism rotates, a small part of transformer oil enters the interior of the piston cavity through the sound absorption passage 901 and the flow guide branch 902, and when the transformer oil meets the junction of the surface of the insulating layer 2, the piston rod 6 stretches out and contracts after the transformer oil stretches out under the action of the elasticity of the pressing spring 603, and the action of the piston rod 6 can promote the flow of the transformer oil in the piston cavity, and when the transformer oil stretches out, a certain amount of oil can be pushed to flow; when the oil is contracted, a low pressure area is created, more oil is sucked into the piston cavity, the dynamic change is helpful for maintaining or increasing the circulation of the oil, the oil can flow in the whole system more effectively, when a partial discharge phenomenon occurs, sound waves with specific frequency can be generated, the sound waves possibly interfere with the detection precision of the monitoring sensor 10 when the sound waves propagate in the transformer oil, and a part of the transformer oil is guided into the piston cavity through the sound absorption passage 901 and the flow guide branch 902, and in the process, the aluminum foam layer in the sound absorption passage 901 is used for effectively absorbing and dispersing the sound wave energy, so that the strength of the sound wave is reduced, and meanwhile, the interference is further reduced by utilizing the sound wave absorption characteristic of the flowing transformer oil, so that the monitoring precision is improved;
In particular, the transformer oil has a certain sound wave absorbing capacity, when the sound wave generated by the partial discharge enters the piston cavity containing the transformer oil through the sound absorbing passage 901 and the flow guiding branch 902, a part of sound wave energy is absorbed, noise interference signals received by the sensor are reduced, in the process that the sound wave propagates through the transformer oil, due to physical characteristics such as viscosity of the oil, the sound wave can undergo attenuation, the intensity of the interference signals is further reduced, and by means of physical isolation (namely the structural design of the flow guiding branch 901 and the sound absorbing passage 902), the sound wave generated by the partial discharge is partially weakened or absorbed before reaching the monitoring sensor 10, so that the influence on the measurement accuracy of the sensor is reduced;
Compared with a straight-line section, the sound absorption passage 901 with the curved section can increase the propagation path length of sound waves in the passage, so that the time and the area of contact between the sound waves and materials can be increased, the absorption efficiency of the sound waves can be improved, the energy of the sound waves can be dispersed, the concentration of the sound waves at specific points in the passage can be avoided, the sound waves can be absorbed more uniformly, the possible resonance effect can be reduced, the distance between the ports of two adjacent sound absorption passages 901 is in a small-before-large arrangement, the arrangement of the small-before-big ports can be in the initial sound absorption stage, the sound wave energy can be concentrated, the probability of entering the sound absorption passages 901 can be increased, the large port distance can be used for facilitating the diffusion and absorption of the sound waves when the sound waves are further propagated, the sound wave reflection and interference can be reduced, and the sound absorption effect can be improved.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
It should be noted that, specific model specifications of the motor need to be determined by selecting a model according to actual specifications of the device, and a specific model selection calculation method adopts the prior art in the field, so detailed description is omitted.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and various modifications and variations may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a transformer partial discharge measuring device, includes transformer body (1) and built-in coil winding and transformer oil circulation mechanism (3) that set up around coil winding thereof, the fixed siren (12) that are provided with of lateral wall of transformer body (1), coil winding outside is provided with insulating layer (2), be provided with a plurality of draft tubes (301) that set up in insulating layer (2) inside on transformer oil circulation mechanism (3), its characterized in that still includes:
Transmission detection assembly: the transmission detection assembly is arranged in the transformer body (1) and is used for monitoring the partial discharge phenomenon and the surface of the insulating layer (2) in real time;
Hydraulic drive assembly: the hydraulic driving assembly is arranged in the draft tube (301), and drives the transmission detection assembly to move;
Plug flow sound absorbing assembly: the plug-flow sound-absorbing assembly is arranged around the insulating layer (2), and reduces noise generated when partial discharge occurs at the insulating layer (2) and pushes and guides the transformer oil.
2. The transformer partial discharge measurement device according to claim 1, wherein the hydraulic driving assembly comprises a limiting frame (504) fixedly connected with the inside of the draft tube (301), a transmission shaft (502) is rotatably connected with the inside of the limiting frame (504), a guide piece (501) is fixedly connected with the top end of the transmission shaft (502), an impact fan blade (503) is fixedly connected with the transmission shaft (502) between the guide piece (501) and the limiting frame (504), and a strong magnetic disk (5) is fixedly connected with the top of the guide piece (501).
3. The transformer partial discharge measurement device according to claim 2, wherein the Jiang Cipan is rotatably connected with the inner wall of the draft tube (301), a channel is provided in the Jiang Cipan (5), the draft piece (501) is in through connection with the inner cavity of the strong magnetic disk (5), a plurality of through holes are annularly formed in the side wall of the draft piece (501), the through holes penetrate through the side wall of the draft piece (501), the draft piece (501) is in a shape of a hollow truncated cone in a flip-chip mode, and the impact fan blade (503) is made of inclined light materials.
4. The transformer partial discharge measurement device according to claim 2, wherein the transmission detection assembly comprises a detection mechanism, a limit magnetic ring (401) and a buffer spring (11), the buffer spring (11) and the limit magnetic ring (401) are both in sliding sleeve connection with the outer side of the draft tube (301), the limit magnetic ring (401) is located right above the buffer spring (11), a plurality of L-shaped struts (4) are fixedly connected to the edge of the limit magnetic ring (401) in a ring shape, and mounting rods (7) are fixedly connected to the side walls of the L-shaped struts (4) facing the insulating layer (2).
5. The partial discharge measurement device for a transformer according to claim 4, wherein the detection mechanism comprises a U-shaped frame (8) fixedly connected with the end part of a monitoring sensor (10) and a mounting rod (7) which are fixedly connected with the side wall of an L-shaped supporting rod (4), a mounting clamping plate (9) is installed in the U-shaped frame (8) in a clamping way, a plurality of piston cavities are arranged in the mounting clamping plate (9), a piston rod (6) is arranged in the piston cavities in a sealing sliding way, a pressing spring (603) is fixedly connected with the bottom wall of the piston cavity, the end part of the pressing spring (603) is fixedly connected with the upper side wall of the piston rod (6), the lower end of the piston rod (6) extends to the outer side of the mounting clamping plate (9) and the end part of the mounting rod (7) is rotatably provided with a ball (604), a connecting rod (601) is fixedly connected with the upper end part of the piston rod (6), the end part of the connecting rod (601) extends to the outer side of the mounting clamping plate (9) and the U-shaped frame (8) and is fixedly connected with a positioning magnet (602), the U-shaped frame (8) and the connecting rod (9) is arranged on the connecting rod (601) and the connecting rod (601) in a sleeved mode and matched with the outer diameter of the piston cavity (603), a plurality of limiting cavities (801) and trigger chambers (802) are arranged on the U-shaped frame (8).
6. The transformer partial discharge measurement device according to claim 5, wherein the limiting cavity (801) and the positioning magnet (602) are arranged in a matching manner, the upper side wall of the triggering chamber (802) is fixedly connected with a reset spring (803), the end part of the reset spring (803) is fixedly connected with a triggering magnet (804), the triggering magnet (804) is slidably connected inside the triggering chamber (802), the lower side wall of the triggering chamber (802) is fixedly connected with an alarm switch (805), the monitoring sensor (10) and the alarm (12) are electrically connected, and a waterproof coating is arranged on the outer side of the monitoring sensor (10).
7. The transformer partial discharge measurement device according to claim 6, wherein the positioning magnet (602) and the triggering magnet (804) are arranged in different magnetic modes, the magnetic force between the opposite surfaces of the positioning magnet (602) and the triggering magnet (804) is larger than the elastic force of the return spring (803), the height of Jiang Cipan is larger than the height of the limit magnetic ring (401), the Jiang Cipan (5) and the limit magnetic ring (401) are arranged in different magnetic modes, and gaps exist between the U-shaped frame (8) and the mounting clamping plate (9) and between the L-shaped supporting rod (4) and the U-shaped frame (8).
8. The transformer partial discharge measurement device according to claim 5, wherein the plug-flow sound-absorbing assembly comprises a plurality of groups of sound-absorbing passages (901) and a plurality of flow-guiding branches (902) which are arranged in the installation clamping plate (9), the installation clamping plate (9) which is positioned between two adjacent piston cavities is provided with the plurality of sound-absorbing passages (901), and the flow-guiding branches (902) respectively penetrate through the two piston cavities and the plurality of sound-absorbing passages (901) at the position.
9. The partial discharge measurement device for a transformer according to claim 8, wherein the cross section of the sound absorbing passages (901) is curved, the distance between the ports of two adjacent sound absorbing passages (901) is small and large, and the inner wall of the sound absorbing passages (901) is provided with an aluminum foam layer.
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| CN202410493592.9A CN118191532A (en) | 2024-04-23 | 2024-04-23 | Transformer partial discharge measuring device |
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| CN202410493592.9A CN118191532A (en) | 2024-04-23 | 2024-04-23 | Transformer partial discharge measuring device |
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