CN110459388B - Radial free-arrangement continuous dry-type transformer winding and processing method thereof - Google Patents
Radial free-arrangement continuous dry-type transformer winding and processing method thereof Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/06—Coil winding
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Abstract
The invention relates to the field of transformers, and provides a radial free-arrangement continuous dry-type transformer winding and a processing method thereof, wherein the winding comprises an electromagnetic wire and an insulating inner cylinder, the electromagnetic wire is wound on the insulating inner cylinder, the winding is formed by freely arranging the electromagnetic wire along the radial direction, the axial direction of the winding is of a structure of overall continuous winding, and the electromagnetic wire and the insulating inner cylinder are integrally cast by resin; the winding method is that the electromagnetic wire is wound from the winding starting end to the other side, the axial direction is totally and continuously wound, the electromagnetic wire is freely stacked on a winding die to form the winding width height, and interlayer insulation or inter-turn insulation is not required to be placed. The invention greatly improves the production efficiency and saves materials; meanwhile, the space occupation ratio of the wire in the winding is increased, the structure is simple, the winding is simple and convenient, the mechanical property is good, the impact resistance is strong, the axial voltage gradient distribution is uniform, the inter-turn potential difference is small, the local discharge capacity is small, and the electrical property is greatly improved.
Description
Technical Field
The invention relates to the field of transformers, in particular to a high-voltage winding of a dry-type transformer and a winding method thereof.
Background
Dry-change windings typically have both segmented cylindrical and continuous winding methods.
The high-voltage coil of the resin casting dry-type transformer is generally manufactured into a multi-section cylindrical coil, and generally 10 kV-35 kV high-voltage coil is divided into 4 sections to 12 sections according to the voltage, so that the number of turns of each layer of coil is reduced, and the voltage between the layers of the coil is reduced. When the winding is carried out, each section is equivalent to an independent multi-layer cylindrical coil, and interlayer insulating materials are needed for high interlayer voltage of the lead wires. As shown in FIG. 1, the number of turns of the upper layer is the same as or less than the number of turns of the lower layer when the segmented cylindrical structure is wound, and the S bending layer is required to be punched when the segment of the upper layer is wound, and then interlayer insulation is placed. The winding of the continuous winding method is shown in fig. 2, the beginning of the continuous coil is led out from the outer diameter of the wire section to form a temporary wire section, then the temporary wire section is pushed down by hands, the turns are turned over manually, and finally a formal wire section with the beginning led out from the outer diameter is formed. In addition, the transposition between the sections from the double number to the singular line sections is on the outer diameter of the line sections, so that all the singular line sections are reverse sections, all the double number sections are positive sections, and the positive sections are the line sections which are wound once without turning over the turns.
The winding of the two structures is complex, the time spent is more, and the technical requirements on operators are higher. And to meet the requirements of insulation distance and electrical strength, it is necessary to increase the inter-segment distance or inter-cake distance. However, the higher the voltage, the larger the sum of the pitches, which causes the overall height of the dry-type transformer coil to be increased, the volume to be increased, the material consumption to be increased, and the product cost to be increased.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a radial freely-arranged continuous dry-type transformer winding and a processing method thereof, which have the advantages of good electrical performance, low cost, high production efficiency and the like.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
the utility model provides a radial free arrangement's continuous type dry-type transformer winding, includes electromagnetic wire and insulating inner tube, and electromagnetic wire winds on insulating inner tube, its characterized in that: the winding is free arrangement of electromagnetic wires along radial direction, the axial direction is a structure of total continuous winding, and the electromagnetic wires and the insulating inner cylinder are integrally cast by resin.
When the winding is embodied, the winding is provided with an upper basic section, a lower basic section and a voltage regulating section in the middle, the voltage regulating section extracts a tapping wire from an electromagnetic wire of the winding, the tapping wire is bound and formed by using a polyimide adhesive tape when being bent and led out, and then the tapping wire is sleeved into a glass fiber sleeve for reinforcement and insulation.
The radial free arrangement and axial overall continuous winding is that electromagnetic wires are wound from the winding starting end to the other side, and because the electromagnetic wires have the height, winding turns such as cake-type coils cannot be wound continuously along the radial direction, so that the optimal tight combination among the electromagnetic wires is ensured, the electromagnetic wires are wound and arranged with inclined slopes, then the radial positions of the windings are gradually filled, the radial free arrangement is realized, the designed radial height is achieved, and because the wire distance among the electromagnetic wires arranged in the structure is small, the axial voltage gradient distribution is even, and the potential difference is very small, so that other insulating materials are not needed for isolation.
In order to realize the radial free-arrangement continuous dry-type transformer winding, the invention provides a radial free-arrangement continuous dry-type transformer winding and a processing method thereof, which are characterized in that:
the winding die of the horizontal winding machine is arranged on a main shaft of the winding machine, electromagnetic wires with wire coils are arranged on a frame, an insulating inner cylinder and left and right limit baffles with perforations are prepared, the radial dimension of the baffle of the limit baffle is higher than the design radial dimension of a winding, and the inner diameters of the insulating inner cylinder and the left and right limit baffles are respectively matched with the outer diameter of the winding die of the horizontal winding machine;
sleeving an insulating inner cylinder and left and right limiting baffles into a winding die, wherein the left and right limiting baffles are respectively positioned at the left and right sides of the insulating inner cylinder, and the insulating inner cylinder and the left and right limiting baffles are fixed on the winding die;
the winding starting end of the electromagnetic wire is the left side or the right side of the insulating inner cylinder, the electromagnetic wire is wound from the winding starting end to the other side, the radial height of the winding of the electromagnetic wire stack is the radial size designed in advance, and the electromagnetic wires are freely arranged along the radial direction;
the electromagnetic wire is freely stacked on the winding mould to form the winding width-wise height without placing interlayer and inter-turn insulation,
the limit stop ring is provided with a laser limiter for controlling the starting and stopping of the winding machine, when the stacking height of the electromagnetic wire exceeds the design size, the laser limiter outputs a signal, the winding machine stops working, a winding worker adjusts the radial height of the electromagnetic wire, and then the winding machine is continuously started to work;
when the electromagnetic wire is wound, the counter of the winding machine measures the number of turns of the electromagnetic wire wound, and the winding is completed by shaping.
In the concrete implementation, the periphery of the left limit baffle plate and the right limit baffle plate are respectively and correspondingly provided with an adjusting groove, and a positioning rod can pass through the corresponding adjusting grooves of the left limit baffle plate and the right limit baffle plate; a servo motor is coaxially arranged on a main shaft of a winding machine on one side of the winding die, a servo motor can drive a positioning rod to synchronously advance along with the arrangement of electromagnetic wires, the radial dimension of a winding is controlled, the distance between the positioning rod and an insulating inner cylinder is the radial height of the winding, and the positioning rod plays a role in positioning the radial height of the electromagnetic wires during the winding of the electromagnetic wires.
The servo motor drives the structure that the locating lever moved, in prior art very much, such as gear drive, lead screw drive etc.. In the concrete implementation, the locating rod is a worm, the locating rod is connected to the spindle of the winding machine through a supporting rod, the output shaft of the servo motor is connected with a turbine which is matched with the worm, and the servo motor works and can drive the locating rod to move through a turbine worm structure.
In the specific implementation, the automatic electromagnetic wire arranger is arranged, and comprises an arranger rod and an arranger support column, wherein the arranger rod can move up and down on the arranger support column, and the arranger rod is parallel to the winding mould and is arranged on the winding side; an automatic wire coil guide rail is arranged on the frame, the wire coil can move left and right on the automatic wire coil guide rail, a wire releasing ring is sleeved on the electromagnetic wire, the electromagnetic wire is positioned below the arrangement rod, and the wire releasing ring is positioned above the arrangement rod.
When the device is specifically implemented, the upper ends of the left limiting baffle and the right limiting baffle are integrally connected with convex strips, and the adjusting groove is positioned at the convex strips of the limiting baffle.
When the electromagnetic wire is stacked freely on the winding mould, the electromagnetic wire strike plate for a winding worker protects the trend of the electromagnetic wire, and the strike plate is matched with the winding size of the winding to be adjusted through the radial positioning function of the positioning rod.
When the winding is provided with a tapping line, the winding is provided with an upper basic section, a lower basic section and a middle tapping section, the counter of the winding machine is used for measuring the number of turns of the electromagnetic wire winding tapping position, when the number of turns of the tapping position reaches the design tapping number of turns of the winding, the winding of the upper basic section is completed, the electromagnetic wire is bent and led out, then the winding is continued, other tapping positions of the middle tapping section are also used for measuring the number of turns of the electromagnetic wire winding position required by the tapping position through the counter of the winding machine, the magnetic wire is bent and led out, and after the middle tapping section is completed, the lower basic section is continuously wound. And binding and forming the tapping lead by using polyimide adhesive tape when bending and leading out, and sleeving the tapping lead into a glass fiber sleeve for reinforcing insulation.
The winding starting end of the electromagnetic wire is the left side or the right side of the insulating inner cylinder, the electromagnetic wire is wound from the winding starting end to the other side, and the positioning rod is controlled by a servo motor beside the die and moves along with the electromagnetic wire. The radial height of the windings of the electromagnetic wire stack is the radial size which is designed in advance, the electromagnetic wires are arranged freely along the radial direction, a servo motor is coaxially arranged on a main shaft of a winding machine beside a wire die, a positioning rod arranged on the servo motor controls the front-back trend through a worm gear and worm, and the radial size of the windings is controlled along with the arrangement of the electromagnetic wires. And a laser limiter for controlling the starting and stopping of the winding machine is arranged on the limiting baffle ring, when the stacking height of the electromagnetic wires exceeds the design size, the laser limiter outputs a signal, a servo motor of the winding machine stops working, and the wire coil and the automatic electromagnetic wire arranger synchronously stop working. The electromagnetic wire is freely stacked on the winding die to form the winding width-wise height without interlayer insulation, when the electromagnetic wire is wound, a counter of the winding machine measures the number of turns of the electromagnetic wire, when the number of turns reaches the design number of turns of the winding, the tapping lead is pulled out, when the tapping lead is bent and led out, the tapping lead is bound and formed by using a polyimide adhesive tape, and then the tapping lead is sleeved into a glass fiber sleeve for shaping, so that winding of the winding is completed.
The invention has the following beneficial effects:
1. according to the winding structure and the winding method provided by the scheme of the invention, as the process requirements of placing interlayer insulation, bending and lifting layers, trapezium arrangement, compact winding and the like are reduced compared with the conventional winding structure in the operation of workers, the workers only need to control the winding direction of the wires, the gradient is not excessively large, and the production efficiency is greatly improved.
2. According to the winding structure and the winding method provided by the scheme of the invention, the turn-to-turn voltage after the electromagnetic wires are freely distributed is far lower than the interlayer voltage of the traditional winding, the local discharge capacity is far lower than that of the traditional winding, and the electrical performance is greatly improved.
3. According to the winding structure and the winding method provided by the scheme of the invention, interlayer insulation of each layer of the wire is eliminated, so that materials are saved; meanwhile, the space occupation rate of the wires in the winding is increased, the coil volume can be reduced by the same sectional area of the wires, and the cost is saved.
4. The winding structure and the winding method provided by the scheme of the invention have the advantages of simple structure, simple and convenient winding method, good mechanical property, strong impact resistance, uniform axial voltage gradient distribution, small inter-turn potential difference and small local discharge capacity, improve the power supply quality and prolong the service life of the transformer.
Drawings
Fig. 1 is a schematic diagram of a prior art segmented cylindrical structure winding.
Fig. 2 is a schematic diagram of a prior art continuous structure winding.
Fig. 3 is a schematic structural diagram of a winding according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of the wiring after the winding casting is completed in accordance with an embodiment of the present invention.
Fig. 5 is a schematic diagram of the principle of turns of windings according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of winding of the winding according to the embodiment of the present invention.
Fig. 7 is a schematic view of a limit stop according to an embodiment of the invention.
In the figure: 1 drum, 2 limit baffle, 3 winding former, 4 electromagnetic wire, 5 insulating inner tube, 6 locating lever, 7 laser limiter, 8 automatic drum guide rail, 9 automatic electromagnetic wire distributor, 10, servo motor, 11 coiling machine main shaft, 12 wire releasing ring, 13 turbine, 21 regulating groove, 22 sand grip, 23 epoxy, 91 arrangement lever, 92 arrangement pillar, X upper connector lug, A lower connector lug, a basic section, b tapping section.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 3-7, the embodiment of the invention selects a dry type transformer with model SCB12-400/10-0.4, provides a continuous dry type transformer winding which is arranged freely in radial direction, and comprises an electromagnetic wire 4 and an insulating inner cylinder 5, wherein the electromagnetic wire 4 is wound on the insulating inner cylinder 5, the upper end of the winding is an upper connector lug X connected with the starting end of the electromagnetic wire 4, the lower end of the winding is a lower connector lug a connected with the tail end of the electromagnetic wire 4, an upper basic section a, a lower basic section a and a middle tapping section b are arranged, the tapping section b extracts tapping wires from the electromagnetic wire 4 of the winding, and the embodiment has six tapping wires. The winding is free arrangement along radial direction of electromagnetic wire 4, its axial is the structure of whole continuous winding, electromagnetic wire 4 and insulating inner tube 5 are with epoxy 23 pouring an organic whole.
The radial free arrangement and axial overall continuous winding is that the electromagnetic wires 4 are wound from the winding starting end to the other side, and winding turns such as cake-type coils are not needed to wind positive and negative cakes along the radial direction because the electromagnetic wires 4 have heights, so that the optimal tight combination among the electromagnetic wires 4 is ensured, the electromagnetic wires 4 have inclined slopes when being wound and arranged, then the radial free arrangement is gradually filled in the radial position of the winding, the designed radial height is achieved, and because the wire distance among the electromagnetic wires 4 arranged in the structure is small, the axial voltage gradient distribution is uniform, the inter-turn potential difference is small, and insulation materials such as other insulating papers are not needed to be isolated, and the like.
As shown in fig. 6 and 7, in combination with fig. 3, 4 and 5, a radial freely arranged continuous dry-type transformer winding and a processing method thereof are provided:
the winding die of the horizontal winding machine is arranged on a main shaft of the winding machine, electromagnetic wires with wire coils are arranged on a frame, an insulating inner cylinder 5 and left and right limit baffles 2 with perforations are prepared, the radial dimension of the baffles of the limit baffles 2 is slightly higher than the design radial dimension of windings, and the inner diameters of the insulating inner cylinder 5 and the left and right limit baffles 2 are respectively matched with the outer diameter of the winding die 3 of the horizontal winding machine; the upper end and the left end and the right end of the left limit baffle 2 are integrally connected with a convex strip 22, and the adjusting groove 21 is positioned at the convex strip 22 of the limit baffle 2. Sleeving an insulating inner cylinder 5 and left and right limit baffles 2 into a winding die 3, wherein the left and right limit baffles 2 are respectively positioned at the left and right sides of the insulating inner cylinder 5, and the insulating inner cylinder 5 and the left and right limit baffles 2 are fixed on the winding die 3; the automatic electromagnetic wire arranger 9 includes an arrangement lever 91 and an arrangement support column 92, the arrangement lever 91 being capable of moving up and down on the arrangement support column 92, the arrangement lever 91 being parallel to the winding former 3 and provided on the winding side; an automatic wire coil guide rail 8 is arranged on the frame, the wire coil 1 can move left and right on the automatic wire coil guide rail 8, a wire releasing ring 12 is sleeved on the electromagnetic wire, the electromagnetic wire is positioned below the arrangement rod, and the wire releasing ring 12 is positioned above the arrangement rod 91.
A servo motor is coaxially arranged on a main shaft of a winding machine on one side of the winding die, a servo motor can drive a positioning rod 6 to synchronously advance along with the arrangement of electromagnetic wires, the radial dimension of a winding is controlled, the distance between the positioning rod 6 and an insulating inner cylinder is the radial height of the winding, and the positioning rod 6 plays a role in positioning the radial height of the electromagnetic wires during the winding of the electromagnetic wires. The left and right ends of the positioning rod 6 are provided with external threads.
In the embodiment of the invention, the positioning rod 6 is a worm, the positioning rod is connected to the main shaft of the winding machine through a supporting rod, the output shaft of the servo motor is connected with a turbine 13 which is matched with the worm, the servo motor works, and the movement of the positioning rod 6 can be driven through the turbine worm structure.
The starting end of the winding is the left side or the right side of the insulating inner cylinder 5, the starting end of the electromagnetic wire 4 is pulled out of the upper connector lug X, the electromagnetic wire 4 is wound from the starting end of the winding to the other side, the positioning rod 6 is arranged on the servo motor 10, the distance between the positioning rod 6 and the insulating inner cylinder 5 is the radial height of the winding, and when the electromagnetic wire 4 is wound, the positioning rod 6 plays a role in positioning the radial height of the electromagnetic wire 4; the laser stopper 7 is installed beside the convex strip 22, and the limiting height is set to be the radial height of the winding design.
The radial height of the windings stacked by the electromagnetic wires 4 is the radial dimension designed in advance, the electromagnetic wires 4 are freely arranged along the radial direction under the cooperative action of the automatic wire coil guide rail 8 and the automatic electromagnetic wire arranger 9, the axial direction is generally and continuously wound, the electromagnetic wires 4 are freely stacked on the winding die 3 to form the radial height of the windings without interlayer insulation, when the electromagnetic wires 4 are freely stacked on the winding die 3, the winding worker shields the trend of the electromagnetic wires 4 by using the knocking plate, and the knocking plate is matched with the winding dimension of the windings through the radial positioning action of the positioning rod 6.
In the embodiment of the invention, when the split wires are arranged, the winding is provided with an upper basic section a, a lower basic section a and a middle voltage regulating section b, the number of turns of the winding position of the electromagnetic wire 4 is measured by the counter of the winding machine, when the number of turns of the winding position reaches the design of the winding split turns, the winding of the upper basic section a is completed, the electromagnetic wire 4 is bent and led out, the polyimide adhesive tape is used for binding and forming, then the split lead is sleeved into the glass fiber sleeve, then the winding is continued, the number of turns of the winding position of the electromagnetic wire 4 is measured by the counter of the winding machine, and the magnetic wire is bent and led out. After the tapping section b at the middle part is completed, tapping points VII and VIII with the largest number of tapping points are needed, after the lead is bent, the technological length is reserved according to the drawing requirement, the lead is interrupted from the top of the bent line, the lead is divided into 2 independent electromagnetic wires, the tapping points VII and VIII are separated, the two disconnected leads are independently subjected to lead binding, polyimide tape is used for binding and forming, the tapping leads are sleeved into a glass fiber sleeve, and then the two tapping leads are tightly bound by a glass fiber tape, so that the two leads have enough insulation distance. And then continuously winding the lower basic section a, simultaneously measuring the number of turns wound by the electromagnetic wire 4 by a counter of a winding machine, drawing out the lower connector lug A at the tail end when the number of turns reaches the design number of turns of the winding, shaping, filling the gap between the tail end of the winding and the limit baffle plate 2 with insulating materials, and ensuring the height consistency of the winding
After winding of the winding is completed, the laser limiter 7 is removed, the positioning rod 6 is fastened by nuts according to the position passing through the adjusting groove 21, the left and right limiting baffles 2, the positioning rod 6 and the winding are integrally removed from the winding machine, and after the winding is inspected to be qualified, an outer die is mounted for epoxy resin pouring.
The invention adopts novel radial free arrangement and axial overall continuous winding, the winding adopts horizontal winding, and wires are freely stacked during winding, so that the arrangement of the wires is not required to be controlled according to the traditional structures such as segmented cylinder type, continuous type and the like. The winding worker installs the mould and the end limiting baffle 2, only the radial dimension of the wire is required to be controlled during winding, the height of the outer mould of the coil is not required to be exceeded, interlayer insulation is not required to be placed, S bending is not required to be conducted to raise the layer of the wire, and the winding mould 3 is not required to be turned around to wind the other half of the wire after the half of the wire is wound like a traditional winding. Because the worker operation is less than the conventional winding structure and the process requirements of interlayer insulation placement, S bending and lifting, trapezoidal arrangement, tight winding, die head dropping and the like are met, the worker only needs to control the winding direction of the wire, and the gradient of the electromagnetic wire is not overlarge. The production time of each winding is saved by more than 50% compared with that of a conventional structure, a skilled worker can achieve one high-voltage coil in 1 hour, 8-9 windings can be wound in one day, and the production efficiency of the conventional winding can only be increased by more than 2 times by 3-4 windings in one day.
According to the structure adopted by the invention, the axial dimension of the winding is higher, the heat dissipation area is increased, the radial dimension is smaller, the heat transfer performance of the winding is better, the structure of the transformer tends to be thin and high, and the temperature rise is reduced by about 3K-5K compared with that of a transformer with a conventional structure.
Through experiments and comparison, applicant selects a transformer with the capacity of 50kVA-1600kVA, and compares the amounts of main raw materials of the dry-type transformer with various capacities manufactured according to the embodiment. Specifically, the results are shown in tables 1 to 4.
Table 1: comparative table for copper wire consumption of winding of embodiment of the invention and conventional structure
Table 2: comparative table for dosage of silicon steel sheet with conventional structure in embodiment of the invention
Table 3: comparative Table for resins of the inventive examples and conventional structures
Table 4: weight comparison table of transformer with conventional structure according to embodiment of the invention
The winding of the transformer of the invention eliminates the inter-segment and inter-cake space of the traditional winding, and the axial height is reduced by 50mm-70mm compared with the traditional winding. The interlayer insulation is eliminated, and the radial thickness is reduced by 4mm-7mm compared with the traditional sleeve. The wires are densely distributed, the space utilization rate is higher, so that the winding volume is smaller, the utilization rate of the iron core iron window is improved, and the silicon steel material is saved by more than 3%.
The transformer of the invention adopts the winding with innovative structure, and the transformer has the superiority in the aspect of temperature rise, so that the design scheme can select more optimized routes. The whole volume of the novel transformer is reduced by 5% -8% compared with the traditional transformer, the resin consumption is saved by 3% -5%, the interlayer insulating material is completely saved, the total weight of the lead is saved by more than 3%, the total cost of the winding is saved by more than 5%, and the total cost of the transformer is saved by 3% -6%.
The embodiment of the invention selects a dry type transformer with the model number of SCB12-400/10-0.4 for test, the capacity of the dry type transformer is 400 kilovolts, the coupling group number Dyn11, the frequency is 50 Hz, the phase number is 3 phases, and the test data are as follows:
the voltage ratio measurement and the connection group label verification adopt a measuring instrument as a JYT-A transformation ratio tester. Voltage ratio measurement and link group designation assay conclusion: the absolute value of the error is not more than 0.4 percent, and the product is qualified. See in particular table 5 voltage ratio measurement and linkage group designation assay tables.
Table 5: voltage ratio measurement and coupling group number verification test meter
The measuring instrument used for measuring the winding resistance is a JYR-10 double-channel transformer direct current resistance tester, and the environment temperature is as follows: 8.5 ℃. Winding resistance measurement conclusion: the resistances of the high-voltage winding wire and the low-voltage winding wire are not more than 2%, if neutral points are led out, the phase resistance and the wire direct current resistance are respectively measured, and the phase resistance is not more than 4%. And (5) qualified. See in particular table 6 winding resistance measurement test table.
Table 6: winding resistance measurement test meter
The DC insulation resistance between the windings and the ground is measured by adopting a measuring instrument which is an insulation resistance tester XD2905, measuring the windings one by one according to standard rules by recording the ambient temperature and the humidity, confirming the test result, and then measuring the next group, wherein the applied voltage is 2500V during the measurement. And the measurement conclusion of the direct current insulation resistance between the windings to the ground is qualified. See table 7 for measuring dc insulation resistance between windings and ground.
Table 7: DC insulation resistance measuring test meter for winding to ground and between windings
Routine insulation (applied withstand voltage test), conclusion: and the voltage and the current are stable in the test time, no abnormal sound is generated in the transformer, and the transformer is qualified. See in particular table 8 insulation routine (external withstand voltage test) test table.
Table 8: insulation routine (external voltage withstand test) test meter
Insulation routine (induction withstand voltage test), adopting NSW-TTCS power transformer test microcomputer measurement and control system test, conclusion: and (5) qualified. See in particular table 9 insulation routine (induction withstand voltage test) test table.
Table 9: insulating routine (inductive withstand voltage test) test meter
And measuring no-load loss and no-load current, adopting a microcomputer measurement and control system test of an NSW-TTCS power transformer test, and conclusion: and (5) qualified. See in particular table 10 for no-load losses and no-load current measurement test tables.
Table 10: no-load loss and no-load current measuring test meter
| Project | Actual measurement value | Standard value | Design value |
| No-load loss (W) | 762 | 785 | 767 |
| No-load current (%) | 0.36 | 1.2+0％ | 0.59 |
| Conclusion(s) | Qualified product | Qualified product | Qualified product |
Short-circuit impedance and load loss are measured, a microcomputer measurement and control system test is adopted for NSW-TTCS power transformer test, and the conclusion is that: and applying rated current not lower than 50%, and measuring the load loss and the impedance voltage of the load. See in particular table 11 short circuit impedance and load loss measurement test tables.
Table 11: short-circuit impedance and load loss measurement test meter
| Project | Actual measurement value | Standard value | Design value |
| Load loss (W) | 3821 | 3990 | 3867 |
| Impedance voltage (%) | 4.01 | 4.0+10％ | 4.15 |
| Conclusion(s) | Qualified product | Qualified product | Qualified product |
And (5) partial discharge measurement, and judging that the partial discharge measurement is qualified. See in particular table 12 partial discharge measurement test table.
Table 12: partial discharge measurement test meter
The traditional dry-type high-voltage winding generally adopts a segmented cylindrical structure, the interlayer voltage is 600V-1400V, the interlayer insulation thickness is 0.2-0.6mm, and the field strength voltage per millimeter is more than 1500V. The partial discharge of the pool will be slightly worse in the casting process than the 10PC specified by the national standard. The transformer winding of the invention has higher axial height and smaller radial size, no interlayer concept exists, the inter-turn voltage after the wires are freely distributed is far lower than the interlayer voltage of the traditional winding, and the local discharge capacity is far lower than the traditional winding. The test result shows that the partial discharge capacity of the transformer with the novel structure can be below 5pC, and the requirements on the casting process and the operation level of workers are lower than those of conventional dry change, so that the method is convenient for companies to train related personnel.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A processing method of a radial freely-arranged continuous dry-type transformer winding is characterized by comprising the following steps of:
the winding die of the horizontal winding machine is arranged on a main shaft of the winding machine, electromagnetic wires with wire coils are arranged on a frame, an insulating inner cylinder and left and right limit baffles with perforations are prepared, the radial dimension of the baffle of the limit baffle is higher than the design radial dimension of a winding, and the inner diameters of the insulating inner cylinder and the left and right limit baffles are respectively matched with the outer diameter of the winding die of the horizontal winding machine;
sleeving an insulating inner cylinder and left and right limiting baffles into a winding die, wherein the left and right limiting baffles are respectively positioned at the left and right sides of the insulating inner cylinder, and the insulating inner cylinder and the left and right limiting baffles are fixed on the winding die;
the winding starting end of the electromagnetic wire is the left side or the right side of the insulating inner cylinder, the electromagnetic wire is wound from the winding starting end to the other side, the radial height of the winding of the electromagnetic wire stack is the radial size designed in advance, and the electromagnetic wires are freely arranged along the radial direction;
the electromagnetic wire is freely stacked on the winding mould to form the winding width-wise height without placing interlayer and inter-turn insulation,
the limit stop ring is provided with a laser limiter for controlling the starting and stopping of the winding machine, when the stacking height of the electromagnetic wire exceeds the design size, the laser limiter outputs a signal, the winding machine stops working, a winding worker adjusts the radial height of the electromagnetic wire, and then the winding machine is continuously started to work;
when the electromagnetic wire is wound, the counter of the winding machine measures the number of turns of the electromagnetic wire wound, and the winding is completed by shaping.
2. A method of processing a radial free-standing continuous dry transformer winding as claimed in claim 1, wherein: the periphery of the left limit baffle plate and the right limit baffle plate are respectively and correspondingly provided with an adjusting groove, and a positioning rod can pass through the corresponding adjusting grooves of the left limit baffle plate and the right limit baffle plate; a servo motor is coaxially arranged on a main shaft of a winding machine on one side of the winding die, a servo motor can drive a positioning rod to synchronously advance along with the arrangement of electromagnetic wires, the radial dimension of a winding is controlled, the distance between the positioning rod and an insulating inner cylinder is the radial height of the winding, and the positioning rod plays a role in positioning the radial height of the electromagnetic wires during the winding of the electromagnetic wires.
3. A method of processing a radial free-standing continuous dry transformer winding as claimed in claim 2, wherein: the positioning rod is a worm, the positioning rod is connected to the spindle of the winding machine through a supporting rod, the output shaft of the servo motor is connected with a turbine which is matched with the worm, and the servo motor works and can drive the positioning rod to move through a turbine worm structure.
4. A method of processing a radial free-standing continuous dry transformer winding as claimed in claim 1, wherein: the automatic electromagnetic wire arranger comprises an arranger rod and an arranger support column, wherein the arranger rod can move up and down on the arranger support column, and is parallel to the winding mould and arranged on the winding side; an automatic wire coil guide rail is arranged on the frame, the wire coil can move left and right on the automatic wire coil guide rail, a wire releasing ring is sleeved on the electromagnetic wire, the electromagnetic wire is positioned below the arrangement rod, and the wire releasing ring is positioned above the arrangement rod.
5. A method of processing a radial free-standing continuous dry transformer winding as claimed in claim 1, wherein: the upper ends and the left and right ends of the left and right limiting baffles are integrally connected with convex strips, and the regulating groove is positioned at the convex strips of the limiting baffles.
6. A method of processing a radial free-standing continuous dry transformer winding as claimed in claim 1, wherein: when the electromagnetic wires are freely stacked on the winding mould, a winding worker uses the electromagnetic wire knocking plate to protect the trend of the electromagnetic wires, and the knocking plate is matched with the winding size of the winding to be adjusted through the radial positioning function of the positioning rod.
7. A method of processing a radial free-standing continuous dry transformer winding as claimed in claim 1, wherein: when the winding is provided with a tapping line, the winding is provided with an upper basic section, a lower basic section and a middle tapping section, the number of turns at the tapping position of the electromagnetic wire winding is measured by a counter of a winding machine, when the number of turns at the tapping position reaches the design tapping number of turns of the winding, the winding of the upper basic section is completed, the electromagnetic wire is bent and led out, then the winding is continued, the other tapping positions of the middle tapping section are wound, the number of turns at the position where the electromagnetic wire winding needs to be tapped is also measured by the counter of the winding machine, the magnetic wire is bent and led out, and after the middle tapping section is completed, the lower basic section is continuously wound; and binding and forming the tapping lead by using polyimide adhesive tape when bending and leading out, and sleeving the tapping lead into a glass fiber sleeve for reinforcing insulation.
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006105693A1 (en) * | 2005-04-05 | 2006-10-12 | Fusheng Liu | Converter transformers with self-coupling compensation and harmonic shielding |
| TW200917301A (en) * | 2007-08-31 | 2009-04-16 | Omron Tateisi Electronics Co | Element assembly, and its manufacturing method |
| CN201680601U (en) * | 2009-12-01 | 2010-12-22 | 山西三益科技有限公司 | Multifunctional controller for gas water heater |
| CN102830740A (en) * | 2012-08-23 | 2012-12-19 | 矽力杰半导体技术(杭州)有限公司 | High-efficiency bias voltage generating circuit |
| CN103354173A (en) * | 2013-07-30 | 2013-10-16 | 江苏亨特集团华特电气有限公司 | Winding method of multi-layer cylindrical coil of transformer |
| CN103779067A (en) * | 2014-02-20 | 2014-05-07 | 江西特种变压器厂 | Method for manufacturing multi-section cylindrical cast coil wound with round winding wire |
| RU2013134901A (en) * | 2013-07-24 | 2015-01-27 | Открытое акционерное общество "ОКБ-Планета" (ОАО "ОКБ-Планета") | INDUCTOR |
| CN105405608A (en) * | 2015-12-03 | 2016-03-16 | 浙江宝威电气有限公司 | Modulating capacity transformer winding |
| CN106816283A (en) * | 2017-03-28 | 2017-06-09 | 上海电变压器有限公司 | A kind of resin casting dry-type transformer high-voltage coil structure, winding method and transformer |
| WO2017181960A1 (en) * | 2016-04-20 | 2017-10-26 | 浙江宝威电气有限公司 | Lightning protection on-load regulated-capacity transformer, and on-load regulated-capacity switch |
| CN210575468U (en) * | 2019-09-03 | 2020-05-19 | 浙江江山变压器股份有限公司 | Continuous dry type transformer winding with radial free arrangement |
-
2019
- 2019-09-03 CN CN201910825680.3A patent/CN110459388B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006105693A1 (en) * | 2005-04-05 | 2006-10-12 | Fusheng Liu | Converter transformers with self-coupling compensation and harmonic shielding |
| TW200917301A (en) * | 2007-08-31 | 2009-04-16 | Omron Tateisi Electronics Co | Element assembly, and its manufacturing method |
| CN201680601U (en) * | 2009-12-01 | 2010-12-22 | 山西三益科技有限公司 | Multifunctional controller for gas water heater |
| CN102830740A (en) * | 2012-08-23 | 2012-12-19 | 矽力杰半导体技术(杭州)有限公司 | High-efficiency bias voltage generating circuit |
| RU2013134901A (en) * | 2013-07-24 | 2015-01-27 | Открытое акционерное общество "ОКБ-Планета" (ОАО "ОКБ-Планета") | INDUCTOR |
| CN103354173A (en) * | 2013-07-30 | 2013-10-16 | 江苏亨特集团华特电气有限公司 | Winding method of multi-layer cylindrical coil of transformer |
| CN103779067A (en) * | 2014-02-20 | 2014-05-07 | 江西特种变压器厂 | Method for manufacturing multi-section cylindrical cast coil wound with round winding wire |
| CN105405608A (en) * | 2015-12-03 | 2016-03-16 | 浙江宝威电气有限公司 | Modulating capacity transformer winding |
| WO2017181960A1 (en) * | 2016-04-20 | 2017-10-26 | 浙江宝威电气有限公司 | Lightning protection on-load regulated-capacity transformer, and on-load regulated-capacity switch |
| CN106816283A (en) * | 2017-03-28 | 2017-06-09 | 上海电变压器有限公司 | A kind of resin casting dry-type transformer high-voltage coil structure, winding method and transformer |
| CN210575468U (en) * | 2019-09-03 | 2020-05-19 | 浙江江山变压器股份有限公司 | Continuous dry type transformer winding with radial free arrangement |
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