CN109738700B - Transformer harmonic detection device - Google Patents
Transformer harmonic detection device Download PDFInfo
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- CN109738700B CN109738700B CN201910181683.8A CN201910181683A CN109738700B CN 109738700 B CN109738700 B CN 109738700B CN 201910181683 A CN201910181683 A CN 201910181683A CN 109738700 B CN109738700 B CN 109738700B
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- 238000001514 detection method Methods 0.000 title claims abstract description 30
- 230000007246 mechanism Effects 0.000 claims abstract description 30
- 238000009434 installation Methods 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 238000004804 winding Methods 0.000 claims description 18
- 238000005491 wire drawing Methods 0.000 claims description 18
- 102000004315 Forkhead Transcription Factors Human genes 0.000 claims description 14
- 108090000852 Forkhead Transcription Factors Proteins 0.000 claims description 14
- 238000003780 insertion Methods 0.000 claims description 12
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- 238000007906 compression Methods 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 4
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- 230000005611 electricity Effects 0.000 abstract description 2
- 238000004458 analytical method Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The invention provides a transformer harmonic detection device, which comprises a device box body, a box cover plate and a folding supporting mechanism, wherein the folding supporting mechanism is arranged on the device box body; a harmonic detector, a current transformer, a voltage transformer and a telescopic mounting rod are arranged in the equipment box body; the folding supporting mechanism is arranged at the bottom of the equipment box body and is used for supporting the equipment box body; the box cover plate is hinged on the edge of the upper opening of the equipment box body and is used for sealing the upper opening; the telescopic installation rod is used for electrically connecting and installing a current transformer and a voltage transformer on a power transmission line connected with the transformer; the harmonic detector is electrically connected with the current transformer and the voltage transformer respectively. The detection device can support the equipment box body by utilizing the folding support mechanism, is convenient to use, is folded and retracted during transportation, and is convenient to transport; utilize flexible installation pole can be convenient for long-range electricity connection current transformer and voltage transformer, play better safety protection effect.
Description
Technical Field
The invention relates to a detection device of a power system, in particular to a transformer harmonic detection device.
Background
Along with the development of scientific technology, more and more power electronic devices and power equipment operate in a power grid as nonlinear loads, a large amount of reactive power and harmonic waves are generated, because a power supply system and a power transmission line have impedance changing along with frequency, certain voltage drop is generated when each harmonic current flows through the power grid and is superimposed on the power supply voltage, the power grid voltage waveform is caused to be distorted, the power supply quality is reduced, the power grid is greatly polluted, and the safety operation of the power system is greatly endangered. Therefore, it is necessary to design a transformer harmonic detection device, which can facilitate maintenance personnel to rapidly detect the harmonic loss of the transformer in the power grid.
Disclosure of Invention
The invention aims at: a transformer harmonic detection device can facilitate maintenance personnel to rapidly detect harmonic loss of a transformer in a power grid.
In order to achieve the above object, the present invention provides a transformer harmonic detection device, which comprises a device box, a box cover plate and a folding supporting mechanism; a harmonic detector, a current transformer, a voltage transformer and a telescopic mounting rod are arranged in the equipment box body; the folding supporting mechanism is arranged at the bottom of the equipment box body and is used for supporting the equipment box body; the box cover plate is hinged on the edge of the upper opening of the equipment box body and is used for sealing the upper opening; the telescopic installation rod is used for electrically connecting and installing a current transformer and a voltage transformer on a power transmission line connected with the transformer; the harmonic detector is respectively and electrically connected with the current transformer and the voltage transformer and is used for collecting voltage signals and current signals on a power transmission line connected with the transformer.
Further, the folding supporting mechanism comprises a vertical supporting pipe, an inserting rod, an inclined supporting rod and two swinging supporting rods; the middle part of the rear edge of the lower side surface of the equipment box body is provided with a support pipe hinge seat, and the upper end of the vertical support pipe is hinged on the support pipe hinge seat, so that the lower end of the vertical support pipe can swing back and forth; the upper end of the inserting rod is inserted into the lower end of the vertical supporting tube; threaded holes are formed in the inserting rod at intervals, and limiting holes are formed in the pipe wall of the vertical supporting pipe; a limit bolt is arranged on the limit hole and is used for being screwed on the threaded hole; a support rod hinge seat is arranged on the lower side surface of the equipment box body and positioned at the front side of the support tube hinge seat; the upper end of the diagonal brace is hinged on the brace hinging seat, so that the lower end of the diagonal brace can swing back and forth; the lower end of the diagonal brace is provided with a U-shaped fork head; a limiting convex ring is arranged on the outer wall of the vertical supporting tube; the U-shaped fork head is buckled on the vertical supporting tube, and the lower side edge of the U-shaped fork head is pressed on the limiting convex ring; a transverse hinge shaft is transversely arranged on the inserting rod, and a side hinge block is hinged on the left end and the right end of the transverse hinge shaft; the two side hinging blocks are respectively provided with a stay bar hinging shaft perpendicular to the transverse hinging shaft, and the end parts of the two swinging stay bars are respectively hinged on the stay bar hinging shafts of the two side hinging blocks; a front side supporting rod is arranged at the front side of the inserting rod, and a transverse compression rod is vertically arranged at the front end of the front side supporting rod; the two ends of the transverse compression bar are provided with a pressing head for pressing on the swing stay bar; a foot pad plate is arranged at the lower end part of the inserting rod and the lower end parts of the two swinging supporting rods.
Further, the pressing head comprises a C-shaped pressing seat, a pressing shaft, a first fixing sleeve and a supporting spring; two ends of the transverse compression bar are provided with round shaft holes; the first fixed sleeve is arranged at the upper orifice of the circular shaft hole, and the supporting spring is arranged in the first fixed sleeve; the upper end of the pressing shaft penetrates through the round shaft hole and then extends into the first fixing sleeve, and an anti-falling convex ring is arranged on the extending end; the supporting spring is elastically supported between the upper cylinder bottom of the first fixed sleeve and the upper end part of the pressing shaft; the C-shaped pressing seat is fixedly arranged on the lower end part of the pressing shaft; the C-shaped opening of the C-shaped pressing seat faces downwards and is used for being buckled and pressed on the swing supporting rod.
Further, a plunger locking buckle is arranged on the lower side surface of the equipment box body and positioned at the front side of the stay bar hinging seat; the inserted link locking buckle consists of a locking seat and two arc-shaped spring pieces; the locking seat is provided with a C-shaped buckle notch for buckling the inserting rod, and the opening of the C-shaped buckle notch faces downwards; the two arc-shaped spring pieces are respectively arranged on two sides of the opening of the C-shaped buckle notch; the inserting rod swings forwards and then enters the notch of the C-shaped buckle, and the two arc-shaped spring pieces extrude the inserting rod into the notch at the opening.
Further, a transverse installation rod is transversely arranged on the vertical supporting tube; two ends of the transverse installation rod are provided with a swing rod locking buckle; the swing rod locking buckle consists of a buckle seat, a locking tension spring and a square lock rod; the clamping seat is provided with a U-shaped notch, and a square lock hole is arranged on the side edge of the notch of the U-shaped notch; the square lock rod is inserted into the square lock hole and used for locking the opening of the U-shaped notch; a baffle rod is vertically arranged on the end part of the square lock rod positioned in the U-shaped notch, and the end part of the baffle rod points to the U-shaped notch; an end disc is arranged at the end part of the square lock rod, which is positioned outside the U-shaped groove; the locking pull spring is sleeved on the square lock rod and is positioned outside the U-shaped groove; both ends of the locking tension spring are respectively and fixedly arranged on the clamping seat and the end disc.
Further, the harmonic detector consists of a power supply module, a shell, an LCD display screen, a microprocessor, a current A/D collector, a voltage A/D collector and two low-pass filter circuits; the microprocessor, the current A/D collector, the voltage A/D collector and the two low-pass filters are all arranged in the shell, and the LCD display screen is arranged on the upper side surface of the shell; the output end of the current transformer is electrically connected with the input end of the current A/D collector through a low-pass filter circuit; the output end of the voltage transformer is electrically connected with the input end of the voltage A/D collector through a low-pass filter circuit; the output ends of the current A/D collector and the voltage A/D collector are respectively and electrically connected with two paths of input ends of the microprocessor; the display signal end of the microprocessor is electrically connected with the control end of the LCD display screen; the power supply module is used for supplying power to the LCD display screen, the microprocessor, the current A/D collector, the voltage A/D collector and the two low-pass filter circuits respectively; a power switch and a detection button are arranged on the shell; the power switch is connected in series on a main power supply line of the power module; the detection button is electrically connected with the control signal input end of the microprocessor.
Further, the current transformer is a pincerlike current transformer, and the pincerlike current transformer is provided with two pressing handle rods; two conductive clips are electrically connected to the two binding posts on the primary side of the voltage transformer, and the conductive clips are provided with two pressing handle rods; an electric clamp limit column and an electric clamp limit column are arranged in the equipment box body; the clamp-shaped current transformer is clamped on the electric clamp limiting column; the conductive clamp is clamped on the electric clamp limiting column.
Further, the telescopic mounting rod comprises an insulating telescopic rod, a fixed sleeve, an insulating wiredrawing, a movable sleeve, a wire spool, a tension pressing rod and a holding handle; the insulation telescopic rod consists of an outer sleeve, a middle sleeve and an inner core rod; the inner core rod is inserted into the middle sleeve, and the middle sleeve is inserted into the outer sleeve; the holding handle is fixedly arranged on the tail end of the outer sleeve; the fixed sleeve is fixedly arranged on the outer end part of the inner core rod; a first pulley is arranged on the outer wall of the fixed sleeve; a second pulley is arranged on the outer sleeve and close to the holding handle; the end part of the tension pressing rod is hinged to the holding handle, a rebound pressure spring is elastically supported between the tension pressing rod and the holding handle, and two ends of the rebound pressure spring are both installed in a limiting manner through a positioning column; a tension swing rod is vertically arranged on the tension pressing rod, and a V-shaped gap notch is arranged at the swing end part of the tension swing rod; a wrapping post is arranged on the tension swing rod, and an anti-drop disc is arranged at the end part of the wrapping post; the wire spool is rotatably arranged on the outer sleeve through a support; one end of the insulating wire drawing is connected to the movable sleeve, and the other end of the insulating wire drawing sequentially passes through the first pulley, the second pulley, the V-shaped gap notch and the winding post and then is wound on the winding disc; at least five windings of the insulating wire drawing are wound on the winding post; the V-shaped gap notch clamps the insulation wire drawing; the fixed sleeve and the movable sleeve are respectively sleeved on the two pressing handle rods of the conductive clamp or the two pressing handle rods of the clamp-shaped current transformer.
Further, a clamping disc is arranged at the tail part of the movable sleeve; the fixed sleeve is provided with a C-shaped fork head which is used for being buckled on the buckling disc; a winding driving handle is fixedly arranged on the rotating shaft of the wire spool; a box handle is arranged at the front side of the equipment box; the front side edge of the case cover plate is hinged with a side strip, and the side strip is provided with a locking lug; the front side of the equipment box body is provided with a lock catch embedding hole which is convenient for the lock catch protruding block to enter, and a magnet used for adsorbing the lock catch protruding block is arranged in the lock catch embedding hole.
Further, the outer walls of the ports of the outer sleeve and the middle sleeve are respectively provided with a telescopic positioning mechanism; the telescopic positioning mechanism consists of a circular sleeve, a positioning tension spring and a positioning pin rod; the round ring sleeve is provided with a positioning pin hole, and a positioning pin rod is inserted into the positioning pin hole; the insertion end of the positioning pin rod is provided with a hemispherical end, and the outer end of the positioning pin rod is provided with a rod end disc; the positioning tension spring is sleeved on the positioning pin rod, and two ends of the positioning tension spring are respectively arranged on the outer wall of the circular ring sleeve and the rod end disc; the insertion ends of the inner core rod and the middle sleeve are respectively provided with a telescopic positioning hole which is convenient for the insertion of the positioning pin rod; the circular sleeves of the two telescopic positioning mechanisms are respectively sleeved on the outer walls of the ports of the inner core rod and the middle sleeve, and limit check rings are arranged on two sides of the circular sleeves.
The beneficial effects of the invention are as follows: the folding supporting mechanism can be used for supporting the equipment box body in use, so that the equipment box body is convenient to use, and is folded and folded during transportation, so that the equipment box body is convenient to transport; utilize flexible installation pole can be convenient for long-range electricity connection current transformer and voltage transformer, play better safety protection effect.
Drawings
FIG. 1 is a schematic view of the structure of the detection device according to the present invention;
FIG. 2 is a schematic view of the internal structure of the equipment cabinet according to the present invention;
FIG. 3 is a schematic view of a locking seat according to the present invention;
FIG. 4 is a schematic view of a telescopic mounting bar according to the present invention;
FIG. 5 is a schematic view of a telescopic positioning mechanism according to the present invention;
FIG. 6 is a schematic view of the overall structure of the fastener seat according to the present invention;
fig. 7 is a schematic circuit structure of the present invention.
Detailed Description
As shown in fig. 1 to 7, the present invention provides a transformer harmonic detection apparatus comprising: comprises a device box body 1, a box cover plate 9 and a folding supporting mechanism; a harmonic detector 2, a current transformer 3, a voltage transformer 5 and a telescopic mounting rod are arranged in the equipment box body 1; the folding supporting mechanism is arranged at the bottom of the equipment box body 1 and is used for supporting the equipment box body 1; the box cover plate 9 is hinged on the edge of the upper opening of the equipment box body 1 and is used for sealing the upper opening; the telescopic installation rod is used for electrically connecting and installing a current transformer 3 and a voltage transformer 5 on a power transmission line connected with the transformer; the harmonic detector 2 is respectively and electrically connected with the current transformer 3 and the voltage transformer 5 and is used for collecting voltage signals and current signals on a power transmission line connected with the transformer. The equipment box body 1 can be supported by the folding supporting mechanism in use, so that the equipment box is convenient to use, and is folded and folded during transportation, so that the equipment box is convenient to transport; the current transformer 3 and the voltage transformer 5 can be connected in a remote electric mode conveniently by utilizing the telescopic installation rod, and a good safety protection effect is achieved.
Further, the folding support mechanism comprises a vertical support tube 16, an inserting rod 17, an inclined support rod 34 and two swinging support rods 19; a support pipe hinging seat 15 is arranged in the middle of the rear edge of the lower side surface of the equipment box body 1, and the upper end of a vertical support pipe 16 is hinged on the support pipe hinging seat 15, so that the lower end of the vertical support pipe 16 can swing back and forth; the upper end of the inserting rod 17 is inserted into the lower end of the vertical support tube 16; threaded holes 28 are formed in the inserting rod 17 at intervals, and limiting holes are formed in the pipe wall of the vertical supporting pipe 16; a limit bolt 29 is arranged on the limit hole and is used for being screwed on the threaded hole 28; a support rod hinge seat 35 is arranged on the lower side surface of the equipment box body 1 and positioned at the front side of the support pipe hinge seat 15; the upper end of the diagonal brace 34 is hinged on a brace hinging seat 35, so that the lower end of the diagonal brace 34 can swing back and forth; a U-shaped fork head 33 is arranged at the lower end of the diagonal brace 34; a limiting convex ring 32 is arranged on the outer wall of the vertical supporting tube 16; the U-shaped fork head 33 is buckled on the vertical supporting tube 16, and the lower side edge of the U-shaped fork head 33 is pressed on the limiting convex ring 32; a transverse hinge shaft is transversely arranged on the inserting rod 17, and a side hinge block 20 is hinged on the left end and the right end of the transverse hinge shaft; the two side hinging blocks 20 are respectively provided with a stay bar hinging shaft which is perpendicular to the transverse hinging shaft, and the end parts of the two swinging stay bars 19 are respectively hinged on the stay bar hinging shafts of the two side hinging blocks 20; a front side supporting rod 21 is arranged on the front side of the inserting rod 17, and a transverse pressing rod 22 is vertically arranged on the front end of the front side supporting rod 21; a pressing head for pressing on the swing stay 19 is arranged at both ends of the transverse compression bar 22; a foot pad 18 is provided at the lower end of the insertion rod 17 and at the lower ends of the two swing struts 19. The vertical support pipe 16 can be supported in an inclined mode by means of the limiting convex rings 32, the inclined support rods 34 and the U-shaped fork heads 33, so that the vertical support pipe 16 can be vertically supported below the equipment box body 1, and as the vertical support pipe 16 is supported at the edge of the rear side, the center of the equipment box body 1 is in the middle, two swing support rods 19 are required to be supported in a splayed mode below, and a three-point support is formed together with the inserting rod 17; the side hinging blocks 20 can be used for realizing multi-angle swinging of the swinging support rod 19, so that the swinging support rod 19 can be unfolded and folded conveniently; the front stay bar 21, the transverse compression bar 22 and the compression head can be used for realizing the fixed limit support of the swing stay bar 19 during unfolding.
Further, the pressing head includes a C-shaped pressing seat 27, a pressing shaft 25, a first fixing sleeve 23, and a supporting spring 24; circular shaft holes are arranged at two ends of the transverse compression bar 22; the first fixed sleeve 23 is arranged at the upper orifice of the circular shaft hole, and the supporting spring 24 is arranged in the first fixed sleeve 23; the upper end of the pressing shaft 25 penetrates through the circular shaft hole and then extends into the first fixing sleeve 23, and an anti-falling convex ring 26 is arranged on the extending end; the supporting spring 24 is elastically supported between the upper barrel bottom of the first fixing sleeve 23 and the upper end portion of the pressing shaft 25; a C-shaped pressing seat 27 fixedly provided on the lower end portion of the pressing shaft 25; the C-shaped opening of the C-shaped pressing seat 27 faces downward for snap-pressing against the swing stay 19. The supporting spring 24, the first fixing sleeve 23, the pressing shaft 25 and the C-shaped pressing seat 27 form an elastic pressing head, so that the equipment box body 1 can slightly incline to the front side when in supporting use, and the stability of the equipment box body 1 when in use is enhanced.
Further, a plunger locking buckle is arranged on the lower side surface of the equipment box body 1 and positioned at the front side of the stay bar hinge seat 35; the inserted link locking buckle consists of a locking seat 36 and two arc-shaped spring pieces 38; a C-shaped buckling notch 37 for buckling the inserting rod 17 is arranged on the locking seat 36, and the opening of the C-shaped buckling notch 37 faces downwards; two arc-shaped spring pieces 38 are respectively arranged on two sides of the opening of the C-shaped buckle notch 37; the inserting rod 17 swings forwards and then enters the C-shaped clamping notch 37, and the two arc-shaped spring pieces 38 press the inserting rod 17 inwards at the opening. The two arc-shaped spring pieces 38 are utilized to squeeze the inserting rod 17 pressed into the C-shaped buckle notch 37, so that the inserting rod 17 is prevented from being easily separated from the C-shaped buckle notch 37.
Further, a transverse mounting bar 30 is transversely provided on the vertical support tube 16; two ends of the transverse mounting rod 30 are provided with a swing rod locking buckle; the swing rod locking buckle consists of a buckle seat 31, a locking tension spring 66 and a square lock rod 64; the clamping seat 31 is provided with a U-shaped slot 63, and a square lock hole is arranged on the side edge of the slot opening of the U-shaped slot 63; the square lock rod 64 is inserted into the square lock hole and used for locking the opening of the U-shaped groove 63; a blocking rod 65 is vertically arranged on the end part of the square lock rod 64 positioned in the U-shaped groove 63, and the end part of the blocking rod 65 points to the U-shaped groove 63; an end disc 67 is provided on the end of the square lock lever 64 outside the U-shaped notch 63; the locking tension spring 66 is sleeved on the square lock rod 64 and is positioned outside the U-shaped groove port 63; both ends of the locking tension spring 66 are fixedly mounted on the catch seat 31 and the end disc 67, respectively. The square lock rod 64 can be used for locking the swing stay bar 19 entering the U-shaped groove port 63 when being folded, and the locking and the releasing are convenient under the cooperation of the locking tension spring 66; the swinging stay bar 19 positioned in the U-shaped groove 63 can be blocked by the action of the blocking bar 65, and the swinging stay bar cannot be easily extruded out from a gap between the end part of the square lock bar 64 and the inner wall of the U-shaped groove 63.
Further, the harmonic detector 2 is composed of a power module, a housing, an LCD display screen 12, a microprocessor, a current A/D collector, a voltage A/D collector and two low-pass filter circuits; the microprocessor, the current A/D collector, the voltage A/D collector and the two low-pass filters are all arranged in the shell, and the LCD display screen 12 is arranged on the upper side surface of the shell; the output end of the current transformer 3 is electrically connected with the input end of the current A/D collector through a low-pass filter circuit; the output end of the voltage transformer 5 is electrically connected with the input end of the voltage A/D collector through a low-pass filter circuit; the output ends of the current A/D collector and the voltage A/D collector are respectively and electrically connected with two paths of input ends of the microprocessor; the display signal end of the microprocessor is electrically connected with the control end of the LCD display screen 12; the power supply module respectively supplies power to the LCD display screen 12, the microprocessor, the current A/D collector, the voltage A/D collector and the two low-pass filter circuits; a power switch 13 and a detection button 14 are arranged on the shell; the power switch 13 is connected in series with a main power supply line of the power module; the detection button 14 is electrically connected to the control signal input of the microprocessor.
Further, the current transformer 3 is a pincerlike current transformer, and the pincerlike current transformer is provided with two pressing handle bars; two conductive clips 6 are electrically connected to the two binding posts on the primary side of the voltage transformer 5, and the conductive clips 6 are provided with two pressing handle bars; an electric clamp limit column 4 and an electric clamp limit column 7 are arranged in the equipment box body 1; the clamp-shaped current transformer is clamped on the electric clamp limiting column 4; the conductive clip 6 is clamped on the electrical clip limiting post 7. The clamp-shaped current transformer and the conductive clamp 6 which are placed in the equipment box body 1 can be limited by utilizing the electric clamp limiting column 4 and the electric clamp limiting column 7.
Further, the telescopic mounting rod includes an insulating telescopic rod 39, a fixed sleeve 40, an insulating wire drawing 42, a movable sleeve 41, a wire spool 61, a tension pressing rod 52, and a grip handle 59; the insulating telescopic rod 39 is composed of an outer sleeve, a middle sleeve and an inner core rod; the inner core rod is inserted into the middle sleeve, and the middle sleeve is inserted into the outer sleeve; the holding handle 59 is fixedly arranged on the tail end of the outer sleeve; the fixing sleeve 40 is fixedly installed on the outer end of the inner core rod; a first pulley 43 is mounted on the outer wall of the fixed sleeve 40; a second pulley 51 is provided on the outer sleeve adjacent to the grip handle 59; the end part of the tension pressing rod 52 is hinged on the holding handle 59, a rebound pressure spring 58 is elastically supported between the tension pressing rod 52 and the holding handle 59, and two ends of the rebound pressure spring 58 are in limit installation through a positioning column 57; a tension swing rod 53 is vertically arranged on the tension pressing rod 52, and a V-shaped gap notch 55 is arranged at the swing end part of the tension swing rod 53; a winding post 54 is arranged on the tension swing rod 53, and an anti-drop disc 56 is arranged at the end part of the winding post 54; the wire spool 61 is rotatably mounted on the outer sleeve through a support 60; one end of the insulating wire drawing 42 is connected to the movable sleeve 41, and the other end sequentially passes through the first pulley 43, the second pulley 51, the V-shaped gap notch 55 and the winding post 54 and then is wound on the winding disc 61; the insulating wire drawing 42 winds around the winding post 54 at least five times; the V-shaped slit notch 55 clamps the insulating wire drawing 42; the fixed sleeve 40 and the movable sleeve 41 are respectively sleeved on the two pressing handle bars of the conductive clamp 6 or the two pressing handle bars of the clamp-shaped current transformer. The V-shaped gap notch 55 can be used for clamping the insulating wire drawing 42, so that the insulating wire drawing 42 is prevented from loosening in the pulling process; the insulating telescopic rod 39 is made of insulating materials, so that the pincer-shaped current transformer and the conductive clamp 6 can be remotely installed, and an effective safety protection effect is achieved; the movable sleeve 41 is pulled directly toward the fixed sleeve 40 during the pulling of the insulated wire 42 by the steering action of the first pulley 43.
Further, a snap disc 45 is arranged at the tail part of the movable sleeve 41; a C-shaped fork head 44 for being buckled on a buckling disc 45 is arranged on the fixed sleeve 40; a winding driving handle 62 is fixedly installed on the rotating shaft of the wire spool 61; a box handle 8 is arranged on the front side of the equipment box 1; a side strip 10 is hinged on the front side edge of the case cover plate 9, and a locking lug 11 is arranged on the side strip 10; a latch insertion hole into which the latch protrusion 11 is inserted is provided at the front side of the apparatus case 1, and a magnet for adsorbing the latch protrusion 11 is provided in the latch insertion hole. The movable sleeve 41 can be conveniently and remotely taken down by utilizing the matching of the clamping disc 45 and the C-shaped fork head 44, the next clamp-shaped current transformer or the conductive clamp 6 is installed on the power transmission line, and the movable sleeve can be taken down by pulling the connecting wire of the clamp-shaped current transformer or the conductive clamp 6 after the detection is completed; the movable sleeve 41 and the fixed sleeve 40 cannot be pulled off at the same time, so that the clamp-shaped current transformer or the conductive clamp 6 is prevented from being pulled off by excessive force, and therefore, the insulating wire drawing 42 needs to be loosened first, the fixed sleeve 40 is pulled off, and then the movable sleeve 41 is buckled by the C-shaped fork 44.
Further, the outer walls of the ports of the outer sleeve and the middle sleeve are respectively provided with a telescopic positioning mechanism, and the outer walls of the ports are provided with through holes; the telescopic positioning mechanism consists of a circular ring sleeve 47, a positioning tension spring 49 and a positioning pin rod 50; the circular sleeve 47 is provided with a positioning pin hole, and a positioning pin rod 50 is inserted into the positioning pin hole; the insertion end of the positioning pin 50 is provided with a hemispherical end, and the outer end of the positioning pin 50 is provided with a rod end disc 48; the positioning tension spring 49 is sleeved on the positioning pin rod 50, and two ends of the positioning tension spring 49 are respectively arranged on the outer wall of the annular sleeve 47 and the rod end disc 48; the insertion ends of the inner core rod and the middle sleeve are respectively provided with a telescopic positioning hole which is convenient for the positioning pin rod 50 to penetrate through the through holes for insertion; the annular sleeves 47 of the two telescopic positioning mechanisms are respectively sleeved on the outer walls of the ports of the inner core rod and the middle sleeve, and limit check rings 46 are arranged on two sides of the annular sleeves 47. The telescopic positioning mechanism can be used for realizing the positioning of the telescopic length, after the circular sleeve 47 is rotated, the positioning pin rod 50 can be quickly inserted into the corresponding telescopic positioning hole under the action of the positioning tension spring 49, and when the circular sleeve 47 is rotated again after the positioning pin rod 50 is pulled out, the positioning pin rod 50 is not inserted into the telescopic positioning hole, so that quick recovery is ensured; the axial position of the annular sleeve 47 can be defined by the limit collars 46 on both sides, so that the locating pin rod 50 can be accurately inserted into the through hole after rotation.
In the transformer harmonic detection device, a microprocessor adopts a minimum system formed by an FPGA, and FFT operation is completed through an own FFT IP core, so that harmonic components on a power transmission line connected with the transformer are obtained, and the adopted harmonic analysis algorithm is an existing algorithm and is not the innovation point of the invention; the current A/D collector and the voltage A/D collector are both composed of the existing digital collector chip, and analog signals are converted into digital signals; the low-pass filter circuit adopts a second-order active low-pass filter circuit, so that the aliasing error of a high-power signal is reduced; the LCD display screen 12 is used for displaying the harmonic processing result of the FPGA; the microprocessor analyzes harmonic components according to the collected voltage signals and current signals, and is convenient for subsequent calculation of harmonic loss.
When the transformer harmonic detection device is used, the folding supporting mechanism is unfolded from the folding state, so that the bottom of the equipment box body 1 is supported; when the folding supporting mechanism is unfolded, the inserting rod 17 is taken down from the locking seat 36, then the U-shaped fork head 33 at the end part of the locking seat 36 is buckled on the vertical supporting tube 16 to realize inclined support, then the two swinging supporting rods 19 are taken down from the U-shaped notch 63 and swing downwards and forwards to the front side of the inserting rod 17, then the two swinging supporting rods 19 are pulled open to the left and right sides, so that the two swinging supporting rods enter the two C-shaped pressing seats 27 respectively, and then the depth of the inserting rod 17 into the vertical supporting tube 16 is adjusted according to the requirement, so that the height adjustment of the equipment box body 1 is realized; when the current transformer 3 and the voltage transformer 5 are connected, the fixed sleeve 40 and the movable sleeve 41 are respectively sleeved on two pressing handle rods of the conductive clamp 6 or two pressing handle rods of the clamp-shaped current transformer, the telescopic length of the insulating telescopic rod 39 is adjusted according to the distance requirement, the telescopic length is positioned through the telescopic positioning mechanism, the insulating wire drawing 42 is tightly clamped in the V-shaped slot 55 and then wound on the winding post 54, the movable sleeve 41 is pulled to be close to the fixed sleeve 40 by pressing the tension pressing rod 52, so that the opening of the clamp-shaped current transformer or the conductive clamp 6 is remotely driven to be opened, and the tension pressing rod 52 is released after the clamp-shaped current transformer or the conductive clamp 6 is aligned with a corresponding power transmission line, so that the clamp-shaped current transformer or the conductive clamp 6 is mounted on the corresponding power transmission line; starting the power switch 13 again to enable the harmonic detector 2 to supply power, and then pressing the detection button 14 to collect voltage signals and circuit signals, filter, analyze harmonic waves and display analysis results; after the detection of each phase of transmission line is finished, the telescopic installation rod, the current transformer 3 and the conductive clamp 6 are retracted and placed in the equipment box body 1, the box cover plate 9 is covered and locked, and then the folding supporting mechanism is restored to a folding state, so that the transportation is convenient.
Claims (8)
1. The utility model provides a transformer harmonic detection device which characterized in that: comprises a device box body (1), a box cover plate (9) and a folding supporting mechanism; a harmonic detector (2), a current transformer (3), a voltage transformer (5) and a telescopic installation rod are arranged in the equipment box body (1); the folding supporting mechanism is arranged at the bottom of the equipment box body (1) and is used for supporting the equipment box body (1); the box cover plate (9) is hinged on the edge of the upper opening of the equipment box body (1) and is used for sealing the upper opening; the telescopic installation rod is used for electrically connecting and installing a current transformer (3) and a voltage transformer (5) on a power transmission line connected with the transformer; the harmonic detector (2) is respectively and electrically connected with the current transformer (3) and the voltage transformer (5) and is used for collecting voltage signals and current signals on a power transmission line connected with the transformer;
the folding supporting mechanism comprises a vertical supporting tube (16), an inserting rod (17), an inclined supporting rod (34) and two swinging supporting rods (19); a support tube hinging seat (15) is arranged in the middle of the rear edge of the lower side surface of the equipment box body (1), and the upper end of a vertical support tube (16) is hinged on the support tube hinging seat (15) so that the lower end of the vertical support tube (16) can swing back and forth; the upper end of the inserting rod (17) is inserted into the lower end of the vertical supporting tube (16); threaded holes (28) are formed in the inserting rod (17) at intervals, and limiting holes are formed in the pipe wall of the vertical supporting pipe (16); a limit bolt (29) is arranged on the limit hole and is used for being screwed on the threaded hole (28); a stay bar hinging seat (35) is arranged on the lower side surface of the equipment box body (1) and positioned at the front side of the stay tube hinging seat (15); the upper end of the diagonal brace (34) is hinged on a brace hinging seat (35) so that the lower end of the diagonal brace (34) can swing back and forth; the lower end of the diagonal brace (34) is provided with a U-shaped fork head (33); a limit convex ring (32) is arranged on the outer wall of the vertical supporting tube (16); the U-shaped fork head (33) is buckled on the vertical supporting tube (16), and the lower side edge of the U-shaped fork head (33) is pressed on the limiting convex ring (32); a transverse hinge shaft is transversely arranged on the inserting rod (17), and a side hinge block (20) is hinged on the left end and the right end of the transverse hinge shaft; the two side hinging blocks (20) are respectively provided with a supporting rod hinging shaft which is perpendicular to the transverse hinging shaft, and the end parts of the two swinging supporting rods (19) are respectively hinged on the supporting rod hinging shafts of the two side hinging blocks (20); a front side supporting rod (21) is arranged at the front side of the inserting rod (17), and a transverse compression rod (22) is vertically arranged at the front end of the front side supporting rod (21); both ends of the transverse compression bar (22) are provided with a pressing head for pressing on the swing stay bar (19); a footing base plate (18) is arranged at the lower end part of the inserting rod (17) and the lower end parts of the two swinging support rods (19);
the current transformer (3) is a pincerlike current transformer, and the pincerlike current transformer is provided with two pressing handle rods; two conductive clips (6) are electrically connected to the two binding posts on the primary side of the voltage transformer (5), and the conductive clips (6) are provided with two pressing handle bars; an electric clamp limit column (4) and an electric clamp limit column (7) are arranged in the equipment box body (1); the clamp-shaped current transformer is clamped on the electric clamp limiting column (4); the conductive clamp (6) is clamped on the electric clamp limiting column (7).
2. The transformer harmonic detection device according to claim 1, wherein: the pressing head comprises a C-shaped pressing seat (27), a pressing shaft (25), a first fixing sleeve (23) and a supporting spring (24); both ends of the transverse compression bar (22) are provided with round shaft holes; the first fixed sleeve (23) is arranged at the upper orifice of the circular shaft hole, and the supporting spring (24) is arranged in the first fixed sleeve (23); the upper end of the pressing shaft (25) penetrates through the round shaft hole and then extends into the first fixing sleeve (23), and an anti-falling convex ring (26) is arranged on the extending end; the supporting spring (24) is elastically supported between the upper barrel bottom of the first fixed sleeve (23) and the upper end part of the pressing shaft (25); the C-shaped pressing seat (27) is fixedly arranged on the lower end part of the pressing shaft (25); the C-shaped opening of the C-shaped pressing seat (27) faces downwards and is used for being buckled and pressed on the swing supporting rod (19).
3. The transformer harmonic detection device according to claim 1, wherein: the lower side surface of the equipment box body (1) and the front side of the stay bar hinging seat (35) are provided with inserted bar locking buckles; the inserted link locking buckle consists of a locking seat (36) and two arc-shaped spring pieces (38); a C-shaped buckling notch (37) for buckling the inserting rod (17) is arranged on the locking seat (36), and the opening of the C-shaped buckling notch (37) faces downwards; two arc-shaped spring pieces (38) are respectively arranged on two sides of the opening of the C-shaped buckle notch (37); the inserting rod (17) swings forwards and then enters the C-shaped clamping notch (37), and the two arc-shaped spring pieces (38) press the inserting rod (17) inwards at the opening.
4. The transformer harmonic detection device according to claim 1, wherein: a transverse mounting rod (30) is transversely arranged on the vertical supporting tube (16); two ends of the transverse installation rod (30) are provided with a swing rod locking buckle; the swing rod locking buckle consists of a buckle seat (31), a locking tension spring (66) and a square lock rod (64); a U-shaped notch (63) is arranged on the buckle seat (31), and a square lock hole is arranged on the side edge of the notch of the U-shaped notch (63); the square lock rod (64) is inserted into the square lock hole and used for locking the opening of the U-shaped groove opening (63); a blocking rod (65) is vertically arranged at the end part of the square lock rod (64) positioned in the U-shaped groove (63), and the end part of the blocking rod (65) points to the U-shaped groove (63); an end disc (67) is arranged at the end part of the square lock rod (64) positioned outside the U-shaped groove opening (63); the locking tension spring (66) is sleeved on the square lock rod (64) and is positioned outside the U-shaped groove opening (63); both ends of the locking tension spring (66) are respectively fixedly arranged on the clamping seat (31) and the end disc (67).
5. The transformer harmonic detection device according to claim 1, wherein: the harmonic detector (2) consists of a power supply module, a shell, an LCD display screen (12), a microprocessor, a current A/D collector, a voltage A/D collector and two low-pass filter circuits; the microprocessor, the current A/D collector, the voltage A/D collector and the two low-pass filters are all arranged in the shell, and the LCD display screen (12) is arranged on the upper side surface of the shell; the output end of the current transformer (3) is electrically connected with the input end of the current A/D collector through a low-pass filter circuit; the output end of the voltage transformer (5) is electrically connected with the input end of the voltage A/D collector through a low-pass filter circuit; the output ends of the current A/D collector and the voltage A/D collector are respectively and electrically connected with two paths of input ends of the microprocessor; the display signal end of the microprocessor is electrically connected with the control end of the LCD display screen (12); the power supply module is used for supplying power to the LCD display screen (12), the microprocessor, the current A/D collector, the voltage A/D collector and the two low-pass filter circuits respectively; a power switch (13) and a detection button (14) are arranged on the shell; the power switch (13) is connected in series with a main power supply line of the power module; the detection button (14) is electrically connected with the control signal input end of the microprocessor.
6. The transformer harmonic detection device according to claim 1, wherein: the telescopic mounting rod comprises an insulating telescopic rod (39), a fixed sleeve (40), an insulating wiredrawing (42), a movable sleeve (41), a wire spool (61), a tension pressing rod (52) and a holding handle (59); the insulating telescopic rod (39) is composed of an outer sleeve, a middle sleeve and an inner core rod; the inner core rod is inserted into the middle sleeve, and the middle sleeve is inserted into the outer sleeve; the holding handle (59) is fixedly arranged on the tail end of the outer sleeve; a fixed sleeve (40) is fixedly arranged on the outer end part of the inner core rod; a first pulley (43) is arranged on the outer wall of the fixed sleeve (40); a second pulley (51) is arranged on the outer sleeve and close to the holding handle (59); the end part of the tension pressing rod (52) is hinged on the holding handle (59), a rebound pressure spring (58) is elastically supported between the tension pressing rod (52) and the holding handle (59), and two ends of the rebound pressure spring (58) are in limit installation through positioning columns (57); a tension swing rod (53) is vertically arranged on the tension pressing rod (52), and a V-shaped gap notch (55) is arranged at the swing end part of the tension swing rod (53); a winding post (54) is arranged on the tension swing rod (53), and an anti-drop disc (56) is arranged at the end part of the winding post (54); the wire spool (61) is rotatably arranged on the outer sleeve through the support (60); one end of the insulating wire drawing (42) is connected to the movable sleeve (41), and the other end of the insulating wire drawing passes through the first pulley (43), the second pulley (51), the V-shaped gap notch (55) and the winding post (54) in sequence and then is wound on the wire winding disc (61); the insulation wire drawing (42) winds the winding post (54) at least five times; the V-shaped gap notch (55) clamps the insulation wire drawing (42); the fixed sleeve (40) and the movable sleeve (41) are respectively sleeved on the two pressing handle rods of the conductive clamp (6) or the two pressing handle rods of the clamp-shaped current transformer.
7. The transformer harmonic detection device according to claim 6, wherein: a clamping disc (45) is arranged at the tail part of the movable sleeve (41); a C-shaped fork head (44) for being buckled on a buckling disc (45) is arranged on the fixed sleeve (40); a winding driving handle (62) is fixedly arranged on the rotating shaft of the wire spool (61); a box handle (8) is arranged at the front side of the equipment box (1); a side strip (10) is hinged to the front side edge of the case cover plate (9), and a locking lug (11) is arranged on the side strip (10); the front side of the equipment box body (1) is provided with a lock catch embedding hole which is convenient for the lock catch protruding block (11) to enter, and a magnet which is used for adsorbing the lock catch protruding block (11) is arranged in the lock catch embedding hole.
8. The transformer harmonic detection device according to claim 6, wherein: the outer walls of the ports of the outer sleeve and the middle sleeve are respectively provided with a telescopic positioning mechanism; the telescopic positioning mechanism consists of a circular ring sleeve (47), a positioning tension spring (49) and a positioning pin rod (50); a positioning pin hole is formed in the annular sleeve (47), and a positioning pin rod (50) is inserted into the positioning pin hole; the insertion end of the positioning pin rod (50) is provided with a hemispherical end, and the outer end of the positioning pin rod (50) is provided with a rod end disc (48); the positioning tension spring (49) is sleeved on the positioning pin rod (50), and two ends of the positioning tension spring (49) are respectively arranged on the outer wall of the circular sleeve (47) and the rod end disc (48); the insertion ends of the inner core rod and the middle sleeve are respectively provided with a telescopic positioning hole which is convenient for the insertion of the positioning pin rod (50); the annular sleeves (47) of the two telescopic positioning mechanisms are respectively sleeved on the outer walls of the ports of the inner core rod and the middle sleeve, and limit check rings (46) are arranged on two sides of the annular sleeves (47).
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| CN201910181683.8A CN109738700B (en) | 2019-03-11 | 2019-03-11 | Transformer harmonic detection device |
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| CN201910181683.8A CN109738700B (en) | 2019-03-11 | 2019-03-11 | Transformer harmonic detection device |
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| CN111257790A (en) * | 2020-03-31 | 2020-06-09 | 无锡太湖学院 | Microcomputer protection switch power state data acquisition equipment |
| CN112649668B (en) * | 2020-12-30 | 2024-05-03 | 国网黑龙江省电力有限公司供电服务中心 | Electric energy quality high-frequency harmonic monitoring device |
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| CN109738700A (en) | 2019-05-10 |
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Address after: 315000 11 wealth center, North Bank of Jiangbei District, Zhejiang, Ningbo 4-1 Applicant after: NINGBO ELECTRIC POWER DESIGN INSTITUTE Co.,Ltd. Address before: 315000 Qinghu Road Recorded Wealth Center No. 11 609, Ningbo City, Zhejiang Province Applicant before: NINGBO ELECTRIC POWER DESIGN INSTITUTE Co.,Ltd. |
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