CN113536632B - Vibration reduction method, device, equipment and storage medium for power transformer winding - Google Patents
Vibration reduction method, device, equipment and storage medium for power transformer winding Download PDFInfo
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- CN113536632B CN113536632B CN202110790462.8A CN202110790462A CN113536632B CN 113536632 B CN113536632 B CN 113536632B CN 202110790462 A CN202110790462 A CN 202110790462A CN 113536632 B CN113536632 B CN 113536632B
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- 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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Abstract
The application relates to a vibration reduction method, device and equipment for a power transformer winding and a storage medium, and belongs to the technical field of power equipment. The method comprises the following steps: obtaining a simulated power transformer structure, wherein the simulated power transformer structure comprises a simulated winding and simulated insulating cushion blocks positioned between wire cakes of the simulated winding, the simulated insulating cushion blocks comprise a first cushion block layer and a second cushion block layer, and the rigidity of the first cushion block layer is greater than that of the second cushion block layer; performing simulation calculation aiming at the structure of the simulation power transformer to obtain the simulation natural frequency of the simulation winding; and adjusting the first cushion block layer and the second cushion block layer according to the difference between the simulation natural frequency and the preset excitation frequency of the simulation winding, wherein the adjusted simulation power transformer structure is used for manufacturing a power transformer. The vibration reduction method, the vibration reduction device, the vibration reduction equipment and the storage medium for the power transformer winding can improve the vibration reduction effect of the power transformer winding.
Description
Technical Field
The present disclosure relates to the technical field of power devices, and in particular, to a method, an apparatus, a device, and a storage medium for damping a winding of a power transformer.
Background
With the enhancement of environmental protection awareness and health awareness, the vibration and noise problems of transformers have been highly valued by environmental protection departments, power supply departments and transformer manufacturers. The vibration and noise of the power transformer are mainly from the vibration of the winding and the iron core, and the winding generates larger vibration when the natural vibration frequency of the winding is equal to or close to the excitation frequency of the winding in the operation process of the transformer.
In the prior art, the natural frequency of the winding is generally adjusted by adjusting the stiffness of the winding so that the natural frequency of the winding is far from the excitation frequency in the transformer, thereby reducing the vibration of the winding.
However, the prior art generally adjusts the stiffness and mass distribution of the windings empirically by a technician, which affects the accuracy of the adjustment of the natural frequency of the windings and thus the damping effect of the power transformer windings.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a method, apparatus, device, and storage medium for damping a power transformer winding, which can improve the damping effect of the power transformer winding.
In a first aspect, embodiments of the present application provide a method for damping vibration of a power transformer winding, the method comprising:
Obtaining a simulated power transformer structure, wherein the simulated power transformer structure comprises a simulated winding and simulated insulating cushion blocks positioned between wire cakes of the simulated winding, the simulated insulating cushion blocks comprise a first cushion block layer and a second cushion block layer, and the first cushion block layer is larger than the second cushion block layer;
performing simulation calculation aiming at the structure of the simulation power transformer to obtain the simulation natural frequency of the simulation winding;
and adjusting the first cushion block layer and the second cushion block layer according to the difference between the simulation natural frequency and the preset excitation frequency of the simulation winding to obtain an adjusted simulation power transformer structure, wherein the adjusted simulation power transformer structure is used for manufacturing a power transformer.
In one embodiment, the simulation natural frequency is a plurality of, the preset excitation frequency is a plurality of, the first cushion layer and the second cushion layer are adjusted according to the difference between the simulation natural frequency and the preset excitation frequency of the simulation winding, and the method comprises the following steps:
determining a target simulation natural frequency and a target preset excitation frequency from a plurality of simulation natural frequencies and a plurality of preset excitation frequencies according to the difference between each simulation natural frequency and each preset excitation frequency, wherein the difference between the target simulation natural frequency and the target preset excitation frequency is minimum;
And adjusting the first cushion block layer and the second cushion block layer according to the target simulation natural frequency and the target preset excitation frequency.
In one embodiment, adjusting the first spacer layer and the second spacer layer according to the target simulated natural frequency and the target preset excitation frequency comprises:
if the target simulation natural frequency is larger than the target preset excitation frequency, increasing the volume of the first cushion block layer and reducing the volume of the second cushion block layer;
if the target simulation natural frequency is smaller than the target preset excitation frequency, the volume of the first cushion block layer is reduced, and the volume of the second cushion block layer is increased.
In one embodiment, performing a simulation calculation on a simulated power transformer structure to obtain a simulated natural frequency of a simulated winding, including:
performing simulation calculation aiming at the vibration response characteristic of the simulated power transformer structure to obtain a characteristic curve of the simulated power transformer structure;
and determining the natural frequency of the simulation winding according to the characteristic curve.
In one embodiment, the method further comprises:
measuring the actual natural frequency of the winding of the manufactured power transformer;
according to the error between the actual natural frequency and the simulation natural frequency, adjusting the structure of the simulation power transformer;
Performing simulation calculation on the adjusted simulated power transformer structure to obtain a secondary simulation natural frequency of the simulation winding;
and carrying out secondary adjustment on the adjusted simulated power transformer structure according to the difference between the secondary simulation natural frequency and the preset excitation frequency to obtain the secondary adjusted simulated power transformer structure.
In one embodiment, adjusting the simulated power transformer structure based on an error between the actual natural frequency and the simulated natural frequency includes:
and adjusting the first cushion block layer and the second cushion block layer according to the error between the actual natural frequency and the simulation natural frequency.
In one embodiment, adjusting the first spacer layer and the second spacer layer based on the error between the actual natural frequency and the simulated natural frequency includes:
if the simulation natural frequency is larger than the actual natural frequency, reducing the volume of the first cushion block layer and increasing the volume of the second cushion block layer;
if the simulation natural frequency is smaller than the actual natural frequency, the volume of the first cushion block layer is increased, and the volume of the second cushion block layer is reduced.
According to a second aspect of the embodiments of the present application, there is provided a vibration damping device for a winding of a power transformer, the device comprising:
The acquisition module is used for acquiring a simulated power transformer structure, the simulated power transformer structure comprises a simulated winding and insulating cushion blocks positioned between wire cakes of the simulated winding, the insulating cushion blocks comprise a first cushion block layer and a second cushion block layer, and the rigidity of the first cushion block layer is larger than that of the second cushion block layer;
the simulation module is used for performing simulation calculation aiming at the structure of the simulation power transformer to obtain the simulation natural frequency of the simulation winding;
the first adjusting module is used for adjusting the first cushion block layer and the second cushion block layer according to the difference between the simulation natural frequency and the preset excitation frequency of the simulation winding to obtain an adjusted simulation power transformer structure, and the adjusted simulation power transformer structure is used for manufacturing a power transformer.
In one embodiment, the simulation natural frequency is a plurality of, the preset excitation frequency is a plurality of, and the first adjustment module is further configured to:
determining a target simulation natural frequency and a target preset excitation frequency from a plurality of simulation natural frequencies and a plurality of preset excitation frequencies according to the difference between each simulation natural frequency and each preset excitation frequency, wherein the difference between the target simulation natural frequency and the target preset excitation frequency is minimum; and adjusting the first cushion block layer and the second cushion block layer according to the target simulation natural frequency and the target preset excitation frequency.
In one embodiment, the first adjustment module is further configured to: if the target simulation natural frequency is larger than the target preset excitation frequency, increasing the volume of the first cushion block layer and reducing the volume of the second cushion block layer; if the target simulation natural frequency is smaller than the target preset excitation frequency, the volume of the first cushion block layer is reduced, and the volume of the second cushion block layer is increased.
In one embodiment, the simulation module is further to:
performing simulation calculation aiming at the vibration response characteristic of the simulated power transformer structure to obtain a characteristic curve of the simulated power transformer structure; and determining the natural frequency of the simulation winding according to the characteristic curve.
In one embodiment, the vibration damping device for a power transformer winding further comprises: a measurement module and a second adjustment module.
In one embodiment, the vibration damping device further comprises:
and the measuring module is used for measuring the actual natural frequency of the winding of the manufactured power transformer.
The second adjusting module is used for adjusting the structure of the simulation power transformer according to the error between the actual natural frequency and the simulation natural frequency; performing simulation calculation on the adjusted simulated power transformer structure to obtain a secondary simulation natural frequency of the simulation winding; and carrying out secondary adjustment on the adjusted simulated power transformer structure according to the difference between the secondary simulation natural frequency and the preset excitation frequency to obtain the secondary adjusted simulated power transformer structure.
In one embodiment, the second adjustment module is further configured to:
and adjusting the first cushion block layer and the second cushion block layer according to the error between the actual natural frequency and the simulation natural frequency.
In one embodiment, the second adjustment module is further configured to:
if the simulation natural frequency is larger than the actual natural frequency, reducing the volume of the first cushion block layer and increasing the volume of the second cushion block layer; if the simulation natural frequency is smaller than the actual natural frequency, the volume of the first cushion block layer is increased, and the volume of the second cushion block layer is reduced.
In a third aspect of embodiments of the present application, there is provided a computer device, the device comprising: a memory and a processor, the memory storing a computer program which, when executed by the processor, implements a method of damping a winding of a power transformer as described in the first aspect above.
In a fourth aspect of the embodiments of the present application, a computer readable storage medium is provided, on which a computer program is stored, which computer program, when being executed by a processor, implements a method for damping a winding of a power transformer as described in the first aspect above.
The beneficial effects that technical scheme that this application embodiment provided include at least:
After the simulated power transformer structure is obtained, simulation calculation is carried out on the simulated power transformer structure to obtain the simulated natural frequency of the simulated winding, wherein the simulated power transformer structure comprises the simulated winding and a simulated insulating cushion block positioned between wire cakes of the simulated winding, the simulated insulating cushion block comprises a first cushion block layer and a second cushion block layer, the rigidity of the first cushion block layer is larger than that of the second cushion block layer, then the first cushion block layer and the second cushion block layer are adjusted according to the difference between the simulated natural frequency and the preset excitation frequency of the simulated winding, and the adjusted simulated power transformer structure is obtained and is used for manufacturing a power transformer. According to the vibration damping method for the power transformer winding, the simulation natural frequency of the simulation winding is obtained through simulation calculation of the power transformer structure, then the rigidity of the winding is adjusted according to the simulation natural frequency and the preset excitation frequency, and compared with the prior art, the rigidity of the winding is adjusted according to human experience, the vibration damping method for the power transformer winding is more accurate in rigidity adjustment of the winding, and therefore vibration damping effect of the power transformer winding can be improved.
Drawings
Fig. 1 is a flowchart of a vibration damping method for a power transformer winding according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a simulation insulating pad provided in an embodiment of the present application;
FIG. 3 is a flowchart of a technical process for adjusting a first pad layer and a second pad layer according to a difference between a simulated natural frequency and a preset excitation frequency of a simulated winding according to an embodiment of the present application;
fig. 4 is a flowchart of a technical process for performing simulation calculation on a simulated power transformer structure to obtain a simulated natural frequency of a simulated winding according to an embodiment of the present application;
FIG. 5 is a flow chart of another method for damping vibration of a power transformer winding according to an embodiment of the present application;
FIG. 6 is a flow chart of another method of damping vibration of a power transformer winding according to an embodiment of the present application;
FIG. 7 is a block diagram of a vibration damping device for a power transformer winding according to an embodiment of the present application;
FIG. 8 is a block diagram of another vibration damping device for a power transformer winding provided in an embodiment of the present application;
fig. 9 is a schematic diagram of an internal structure of a computer device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
With the enhancement of environmental protection awareness and health awareness, the vibration and noise problems of transformers have been highly valued by environmental protection departments, power supply departments and transformer manufacturers. The vibration and noise of the power transformer are mainly from the vibration of the windings and the iron core, and during the operation of the transformer, when the natural frequency of the windings is equal to or close to the excitation frequency in the transformer, the windings generate larger vibration.
In the prior art, the natural frequency of the winding is generally adjusted by adjusting the stiffness of the winding so that the natural frequency of the winding is far from the excitation frequency in the transformer, thereby reducing the vibration of the winding. However, the prior art adjustments to the stiffness and mass distribution of the windings are typically made empirically by a technician, which can affect the accuracy of the winding natural frequency adjustments and thus the damping effect of the power transformer windings.
According to the vibration reduction method for the power transformer winding, after the simulated power transformer structure is obtained, simulation calculation is conducted on the simulated power transformer structure to obtain the simulated natural frequency of the simulated winding, the simulated power transformer structure comprises the simulated winding and the simulated insulating cushion blocks located between wire cakes of the simulated winding, the simulated insulating cushion blocks comprise first cushion block layers and second cushion block layers, the rigidity of the first cushion block layers is larger than that of the second cushion block layers, then the rigidity of the first cushion block layers and the rigidity of the second cushion block layers are adjusted according to the difference between the simulated natural frequency and the preset excitation frequency of the simulated winding, and the adjusted simulated power transformer structure is used for manufacturing a power transformer. According to the vibration damping method for the power transformer winding, the simulation natural frequency of the simulation winding is obtained through simulation calculation of the power transformer structure, then the rigidity of the winding is adjusted according to the simulation natural frequency and the preset excitation frequency, and compared with the prior art, the rigidity of the winding is adjusted according to human experience, the vibration damping method for the power transformer winding is more accurate in rigidity adjustment of the winding, and therefore vibration damping effect of the power transformer winding can be improved.
Furthermore, by adjusting the vibration of the winding, the vibration response of the winding is reduced, the winding is used as a main source of vibration and noise and a main component of the power transformer, vibration reduction is completed at the source, the vibration and noise generated by the whole transformer can be reduced, the influence of mechanical vibration on the service life of the winding and the mechanical structure of the connecting piece can be reduced, and the service life of the transformer is prolonged.
In addition, in the prior art, mass distribution of the winding is changed by additionally installing mass blocks with different densities and different sizes on the winding, so that the adjustment of the natural vibration frequency of the winding is realized, the natural vibration frequency of the winding is far away from the excitation frequency of electromagnetic force, and vibration reduction of the winding is realized. However, the mass block is additionally added on the original transformer structure, so that the original insulation structure design of the transformer is affected, the balance of the electric field distribution inside the original transformer is changed, the windings are easy to generate local breakdown, and the normal operation of the transformer is affected.
The power transformer structure manufactured by the vibration reduction method of the power transformer winding comprises the winding and the insulating cushion blocks positioned between the wire cakes of the winding, wherein the insulating cushion blocks comprise a first cushion block layer and a second cushion block layer, the rigidity of the first cushion block layer is larger than that of the second cushion block layer, and the rigidity adjustment of the power transformer winding can be realized by changing the first cushion block layer and the second cushion block layer, so that the natural vibration frequency of the winding is far away from the excitation frequency of electromagnetic force, and the vibration reduction of the power transformer winding is realized. The whole insulating cushion block in the original power transformer is divided into the first cushion block layer and the second cushion block layer, the integral structure and the volume of the insulating cushion block are unchanged, and the rigidity of the first cushion block layer and the rigidity of the second cushion block layer are adjusted to realize the adjustment of the rigidity of the winding.
The following describes the technical solution of the present application and how the technical solution of the present application solves the above technical problems in detail with specific embodiments. The following embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.
Referring to fig. 1, a flowchart of a vibration damping method for a power transformer winding according to an embodiment of the present application is shown, and as shown in fig. 1, the vibration damping method for a power transformer winding may include the following steps:
and 101, acquiring a simulated power transformer structure.
The simulation power transformer structure comprises a simulation winding and simulation insulating cushion blocks positioned between wire cakes of the simulation winding, wherein the simulation insulating cushion blocks comprise a first cushion block layer and a second cushion block layer, and the rigidity of the first cushion block layer is larger than that of the second cushion block layer. The schematic structural diagram of the simulation insulating cushion block is shown in fig. 2.
Optionally, the first cushion layer may be made of epoxy resin or other high temperature resistant insulating materials, and the second cushion layer may be made of high temperature resistant rubber or high temperature resistant viscoelastic materials or high temperature resistant insulating materials with rigidity greater than that of the first cushion layer.
Wherein, the natural frequency here means that the frequency of the winding vibration is independent of the initial condition and is related only to the natural characteristics of the winding, wherein the natural characteristics include: quality, shape, material, etc.
Optionally, a model of the simulated power transformer structure can be established according to an actual power transformer structure and a finite element analysis method, and simulation calculation is performed on the model of the simulated power transformer structure to obtain a simulation natural frequency of the simulation winding.
And 103, adjusting the first cushion block layer and the second cushion block layer according to the difference between the simulation natural frequency and the preset excitation frequency of the simulation winding to obtain an adjusted simulation power transformer structure.
The adjusted simulated power transformer structure is used for manufacturing a power transformer. The excitation frequency here refers to the frequency of winding vibrations generated by forces acting on the windings in the power transformer.
Alternatively, the preset excitation frequency may be a frequency of 50Hz, 100Hz, 150Hz, 200Hz, 250Hz, or 300Hz, and the preset excitation frequency may be obtained through an actual test or obtained through theoretical calculation, which is not limited by comparison in the embodiment of the present application.
According to the difference between the natural frequency of the simulation and the preset excitation frequency of the simulation winding, the rigidity of the first cushion layer and the rigidity of the second cushion layer are adjusted so that the natural frequency of the simulation winding is far away from the preset excitation frequency, when the difference between the natural frequency of the simulation winding and the preset excitation frequency is larger than the preset difference, an adjusted simulation power transformer structure is obtained, and a power transformer is manufactured according to the adjusted simulation power transformer structure.
According to the vibration reduction method for the power transformer winding, after the simulated power transformer structure is obtained, simulation calculation is conducted on the simulated power transformer structure to obtain the simulated natural frequency of the simulated winding, the simulated power transformer structure comprises the simulated winding and the simulated insulating cushion blocks located between wire cakes of the simulated winding, the simulated insulating cushion blocks comprise first cushion block layers and second cushion block layers, the rigidity of the first cushion block layers is larger than that of the second cushion block layers, then the rigidity of the first cushion block layers and the rigidity of the second cushion block layers are adjusted according to the difference between the simulated natural frequency and the preset excitation frequency of the simulated winding, and the adjusted simulated power transformer structure is used for manufacturing a power transformer. According to the vibration damping method for the power transformer winding, the simulation natural frequency of the simulation winding is obtained through simulation calculation of the power transformer structure, then the rigidity of the winding is adjusted according to the simulation natural frequency and the preset excitation frequency, and compared with the prior art, the rigidity of the winding is adjusted according to human experience, the vibration damping method for the power transformer winding is more accurate in rigidity adjustment of the winding, and therefore vibration damping effect of the power transformer winding can be improved.
Furthermore, by adjusting the vibration of the winding, the vibration response of the winding is reduced, the winding is used as a main source of vibration and noise and a main component of the power transformer, vibration reduction is completed at the source, the vibration and noise generated by the whole transformer can be reduced, the influence of mechanical vibration on the service life of the winding and the mechanical structure of the connecting piece can be reduced, and the service life of the transformer is prolonged.
Further, this application embodiment is owing to divide into first cushion layer and second cushion layer through a monoblock insulating cushion in with original power transformer, its insulating cushion's overall structure and volume are unchangeable to through the rigidity on adjustment first cushion layer and second cushion layer, realize the adjustment of winding rigidity, consequently, can not influence the original insulating structure design of power transformer, can not change the equilibrium of original power transformer inside electric field distribution, can avoid leading to the winding to produce the problem of local breakdown because of inside electric field distribution's balance, and then can not influence power transformer's normal operating.
Referring to fig. 3, according to the difference between the simulated natural frequencies and the preset excitation frequencies of the simulated windings, the technical process of the first cushion layer and the second cushion layer is adjusted, wherein the simulated natural frequencies are multiple, and the preset excitation frequencies are multiple. As shown in fig. 3, the technical process may include the steps of:
301. And determining the target simulation natural frequency and the target preset excitation frequency from the simulation natural frequencies and the preset excitation frequencies according to the difference between the simulation natural frequencies and the preset excitation frequencies.
Wherein, the difference between the target simulation natural frequency and the target preset excitation frequency is minimum.
Alternatively, the difference between the simulated natural frequency and the preset excitation frequency may be a ratio of the absolute value of the difference between the simulated natural frequency and the preset excitation frequency to the preset excitation frequency.
302. And adjusting the first cushion block layer and the second cushion block layer according to the target simulation natural frequency and the target preset excitation frequency.
In practical application, in the adjustment of the rigidity of the first cushion layer and the rigidity of the second cushion layer, the target simulation natural frequency and the target preset excitation frequency are firstly determined from a plurality of simulation natural frequencies and a plurality of preset excitation frequencies, wherein the difference between the target simulation natural frequency and the target preset excitation frequency is the smallest, and then the rigidity of the first cushion layer and the rigidity of the second cushion layer are adjusted according to the difference between the target simulation natural frequency and the target preset excitation frequency, so that the difference between the target simulation natural frequency and the target preset excitation frequency is larger than the preset difference. And then, calculating the difference between each simulation natural frequency and the preset excitation frequency again according to the rigidity of the adjusted first cushion block layer and the rigidity of the second cushion block layer, if the difference between the simulation natural frequency and the preset excitation frequency is found to be smaller than the preset value, taking the simulation natural frequency corresponding to the difference and the preset excitation frequency as the target simulation natural frequency and the target preset excitation frequency again to adjust the rigidity of the first cushion block layer and the rigidity of the second cushion block layer so that the difference between the target simulation natural frequency and the target preset excitation frequency is larger than the preset difference, and repeatedly calculating and adjusting for a plurality of times can enable the difference between each simulation natural frequency and each preset excitation frequency to be larger than the preset difference value, so that the vibration of the winding can be greatly reduced, and the vibration reduction effect of the winding is further improved.
In one embodiment, adjusting the first spacer layer and the second spacer layer according to the target simulated natural frequency and the target preset excitation frequency comprises:
if the target simulation natural frequency is larger than the target preset excitation frequency, increasing the volume of the first cushion block layer and reducing the volume of the second cushion block layer;
if the target simulation natural frequency is smaller than the target preset excitation frequency, the volume of the first cushion block layer is reduced, and the volume of the second cushion block layer is increased.
Alternatively, the volume of the spacer layer may be increased by increasing the thickness of the spacer layer, and the volume of the spacer layer may be reduced by decreasing the thickness of the spacer layer.
Because the rigidity of the first cushion block layer is larger than that of the second cushion block layer, when the target simulation natural frequency is larger than the target preset excitation frequency, the volume of the first cushion block layer is increased and the volume of the second cushion block layer is reduced for enabling the difference between the target simulation natural frequency and the target preset excitation frequency to be larger than the preset difference; when the target simulation natural frequency is smaller than the target preset excitation frequency, the volume of the first cushion block layer is reduced and the volume of the second cushion block layer is increased in order to enable the difference between the target simulation natural frequency and the target preset excitation frequency to be larger than the preset difference.
Referring to fig. 4, the technical process for obtaining the simulated natural frequency of the simulated winding by performing the simulation calculation on the simulated power transformer structure provided in the embodiment of the present application may include, as shown in fig. 4, the following steps:
401. performing simulation calculation aiming at the vibration response characteristic of the simulated power transformer structure to obtain a characteristic curve of the simulated power transformer structure;
402. and determining the natural frequency of the simulation winding according to the characteristic curve.
The characteristic curve of the simulated power transformer structure can be obtained by performing simulation calculation on the vibration response characteristic of the simulated power transformer structure, the local maximum value in the characteristic curve is determined to be the natural frequency of the simulated winding, and the natural frequency of the simulated winding is multiple because the characteristic curve comprises multiple local maximum values.
Referring to fig. 5, another vibration damping method for a power transformer winding according to an embodiment of the present application is shown, and as shown in fig. 5, the vibration damping method for a power transformer winding may include the following steps:
501. The actual natural frequency of the windings of the fabricated power transformer is measured.
502. And adjusting the structure of the simulated power transformer according to the error between the actual natural frequency and the simulated natural frequency.
503. And performing simulation calculation on the adjusted simulated power transformer structure to obtain the secondary simulation natural frequency of the simulation winding.
504. And carrying out secondary adjustment on the adjusted simulated power transformer structure according to the difference between the secondary simulation natural frequency and the preset excitation frequency to obtain the secondary adjusted simulated power transformer structure.
In one embodiment, adjusting the simulated power transformer structure based on an error between the actual natural frequency and the simulated natural frequency includes: and adjusting the first cushion block layer and the second cushion block layer according to the error between the actual natural frequency and the simulation natural frequency.
In one embodiment, adjusting the structure of the first spacer layer and the structure of the second spacer layer based on the error between the actual natural frequency and the simulated natural frequency comprises:
if the simulation natural frequency is larger than the actual natural frequency, reducing the volume of the first cushion block layer and increasing the volume of the second cushion block layer;
if the simulation natural frequency is smaller than the actual natural frequency, the volume of the first cushion block layer is increased, and the volume of the second cushion block layer is reduced.
And manufacturing a power transformer according to the adjusted simulated power transformer structure, measuring the actual natural frequency of a winding of the manufactured power transformer, adjusting the simulated power transformer structure according to the error between the actual natural frequency and the simulated natural frequency so that the error value between the simulated natural frequency and the actual natural frequency of the simulated power transformer is smaller than a preset error value, performing simulation calculation again on the adjusted simulated power transformer structure to obtain the secondary simulated natural frequency of the simulated winding, and performing secondary adjustment on the adjusted simulated power transformer structure according to the difference between the secondary simulated natural frequency and the preset excitation frequency to obtain the secondary adjusted simulated power transformer structure. The natural frequency accuracy of the actual winding can be improved by adjusting the simulated power transformer structure according to the error between the actual natural frequency and the simulated natural frequency and performing secondary adjustment on the adjusted simulated power transformer structure, and the rigidity of the winding can be adjusted more accurately by the actual natural frequency of the winding.
Referring to fig. 6, another vibration damping method for a power transformer winding according to an embodiment of the present application is shown, and as shown in fig. 6, the vibration damping method for a power transformer winding may include the following steps:
601. And obtaining the structure of the simulation power transformer.
602. And performing simulation calculation on the vibration response characteristic of the simulated power transformer structure to obtain a characteristic curve of the simulated power transformer structure.
603. And determining the natural frequency of the simulation winding according to the characteristic curve.
604. And determining the target simulation natural frequency and the target preset excitation frequency from the simulation natural frequencies and the preset excitation frequencies according to the difference between the simulation natural frequencies and the preset excitation frequencies.
605. And adjusting the rigidity of the first cushion block layer and the rigidity of the second cushion block layer according to the target simulation natural frequency and the target preset excitation frequency to obtain an adjusted simulation power transformer structure.
606. The actual natural frequency of the windings of the fabricated power transformer is measured.
607. And adjusting the structure of the simulated power transformer according to the error between the actual natural frequency and the simulated natural frequency.
608. And performing simulation calculation on the adjusted simulated power transformer structure to obtain the secondary simulation natural frequency of the simulation winding.
609. And carrying out secondary adjustment on the adjusted simulated power transformer structure according to the difference between the secondary simulation natural frequency and the preset excitation frequency to obtain the secondary adjusted simulated power transformer structure.
According to the vibration reduction method for the power transformer winding, after the simulated power transformer structure is obtained, simulation calculation is conducted on the simulated power transformer structure to obtain the simulated natural frequency of the simulated winding, the simulated power transformer structure comprises the simulated winding and the simulated insulating cushion blocks located between wire cakes of the simulated winding, the simulated insulating cushion blocks comprise first cushion block layers and second cushion block layers, the rigidity of the first cushion block layers is larger than that of the second cushion block layers, then the rigidity of the first cushion block layers and the rigidity of the second cushion block layers are adjusted according to the difference between the simulated natural frequency and the preset excitation frequency of the simulated winding, and the adjusted simulated power transformer structure is used for manufacturing a power transformer. According to the vibration damping method for the power transformer winding, the simulation natural frequency of the simulation winding is obtained through simulation calculation of the power transformer structure, then the rigidity of the winding is adjusted according to the simulation natural frequency and the preset excitation frequency, and compared with the prior art, the rigidity of the winding is adjusted according to human experience, the vibration damping method for the power transformer winding is more accurate in rigidity adjustment of the winding, and therefore vibration damping effect of the power transformer winding can be improved.
Referring to fig. 7, a block diagram of a vibration damping device 700 for a power transformer winding according to an embodiment of the present application is shown, where the vibration damping device 700 may be configured in a computer device. As shown in fig. 7, the vibration damping device 700 of the power transformer winding may include: an acquisition module 701, a simulation module 702 and a first adjustment module 703.
The acquisition module 701 is configured to acquire a simulated power transformer structure, where the simulated power transformer structure includes a simulated winding and an insulating spacer located between wire cakes of the simulated winding, the insulating spacer includes a first spacer layer and a second spacer layer, and the rigidity of the first spacer layer is greater than the rigidity of the second spacer layer;
the simulation module 702 is configured to perform simulation calculation for a simulated power transformer structure to obtain a simulated natural frequency of a simulated winding;
the first adjusting module 703 is configured to adjust the first cushion layer and the second cushion layer according to a difference between the simulated natural frequency and a preset excitation frequency of the simulated winding, so as to obtain an adjusted simulated power transformer structure, where the adjusted simulated power transformer structure is used to manufacture a power transformer.
In one embodiment, the simulation natural frequency is multiple, the preset excitation frequency is multiple, and the first adjustment module 703 is further configured to:
Determining a target simulation natural frequency and a target preset excitation frequency from a plurality of simulation natural frequencies and a plurality of preset excitation frequencies according to the difference between each simulation natural frequency and each preset excitation frequency, wherein the difference between the target simulation natural frequency and the target preset excitation frequency is minimum; and adjusting the first cushion block layer and the second cushion block layer according to the target simulation natural frequency and the target preset excitation frequency.
In one embodiment, the first adjustment module 703 is further configured to: if the target simulation natural frequency is larger than the target preset excitation frequency, increasing the volume of the first cushion block layer and reducing the volume of the second cushion block layer; if the target simulation natural frequency is smaller than the target preset excitation frequency, the volume of the first cushion block layer is reduced, and the volume of the second cushion block layer is increased.
In one embodiment, the simulation module 702 is further configured to:
performing simulation calculation aiming at the vibration response characteristic of the simulated power transformer structure to obtain a characteristic curve of the simulated power transformer structure; and determining the natural frequency of the simulation winding according to the characteristic curve.
Referring to fig. 8, a block diagram of another vibration damping device 700 for a power transformer winding according to an embodiment of the present application is shown, where the vibration damping device 700 may be configured in a computer device. As shown in fig. 8, the vibration damping device 700 of the power transformer winding further includes: a measurement module 704, a second adjustment module 705.
In one embodiment, the vibration damping device 700 further comprises:
and the measuring module 704 is used for measuring the actual natural frequency of the winding of the manufactured power transformer.
The second adjustment module 705 adjusts the simulated power transformer structure according to the error between the actual natural frequency and the simulated natural frequency; performing simulation calculation on the adjusted simulated power transformer structure to obtain a secondary simulation natural frequency of the simulation winding; and carrying out secondary adjustment on the adjusted simulated power transformer structure according to the difference between the secondary simulation natural frequency and the preset excitation frequency to obtain the secondary adjusted simulated power transformer structure.
In one embodiment, the second adjustment module 705 is further configured to:
and adjusting the first cushion block layer and the second cushion block layer according to the error between the actual natural frequency and the simulation natural frequency.
In one embodiment, the second adjustment module 705 is further configured to:
if the simulation natural frequency is larger than the actual natural frequency, reducing the volume of the first cushion block layer and increasing the volume of the second cushion block layer; if the simulation natural frequency is smaller than the actual natural frequency, the volume of the first cushion block layer is increased, and the volume of the second cushion block layer is reduced.
The vibration damping device for the power transformer winding can achieve the method embodiment, and the implementation principle and the technical effect are similar and are not repeated here.
For specific limitations of the damping device for the power transformer winding, reference may be made to the above limitations of the damping method for the power transformer winding, which are not repeated here. The modules in the vibration damping device of the power transformer winding can be fully or partially realized by software, hardware and the combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
FIG. 9 is a schematic diagram of the internal structure of a computer device in one embodiment. As shown in fig. 9, the computer device includes a processor and a memory connected by a system bus. Wherein the processor is operative to provide computing and control capabilities to support operation of the entire computer device. The memory may include a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The computer program is executable by a processor for implementing a method of damping a transformer winding as provided in the various embodiments above. The internal memory provides a cached operating environment for the operating system and computer programs in the non-volatile storage medium.
It will be appreciated by those skilled in the art that the structure shown in fig. 9 is merely a block diagram of a portion of the structure associated with the present application and is not limiting of the terminal to which the present application is applied, and that a particular terminal may include more or fewer components than shown, or may combine some of the components, or have a different arrangement of components.
In one embodiment, a computer device is provided comprising a memory and a processor, the memory having stored therein a computer program, the processor when executing the computer program performing the steps of:
obtaining a simulated power transformer structure, wherein the simulated power transformer structure comprises a simulated winding and simulated insulating cushion blocks positioned between wire cakes of the simulated winding, the simulated insulating cushion blocks comprise a first cushion block layer and a second cushion block layer, and the first cushion block layer is larger than the second cushion block layer; performing simulation calculation aiming at the structure of the simulation power transformer to obtain the simulation natural frequency of the simulation winding; and adjusting the first cushion block layer and the second cushion block layer according to the difference between the simulation natural frequency and the preset excitation frequency of the simulation winding to obtain an adjusted simulation power transformer structure, wherein the adjusted simulation power transformer structure is used for manufacturing a power transformer.
In one embodiment, the processor when executing the computer program further performs the steps of: determining a target simulation natural frequency and a target preset excitation frequency from a plurality of simulation natural frequencies and a plurality of preset excitation frequencies according to the difference between each simulation natural frequency and each preset excitation frequency, wherein the difference between the target simulation natural frequency and the target preset excitation frequency is minimum; and adjusting the first cushion block layer and the second cushion block layer according to the target simulation natural frequency and the target preset excitation frequency.
In one embodiment, the processor when executing the computer program further performs the steps of: if the target simulation natural frequency is larger than the target preset excitation frequency, increasing the volume of the first cushion block layer and reducing the volume of the second cushion block layer; if the target simulation natural frequency is smaller than the target preset excitation frequency, the volume of the first cushion block layer is reduced, and the volume of the second cushion block layer is increased.
In one embodiment, the processor when executing the computer program further performs the steps of: performing simulation calculation aiming at the vibration response characteristic of the simulated power transformer structure to obtain a characteristic curve of the simulated power transformer structure; and determining the natural frequency of the simulation winding according to the characteristic curve.
In one embodiment, the processor when executing the computer program further performs the steps of: measuring the actual natural frequency of the winding of the manufactured power transformer; according to the error between the actual natural frequency and the simulation natural frequency, adjusting the structure of the simulation power transformer; performing simulation calculation on the adjusted simulated power transformer structure to obtain a secondary simulation natural frequency of the simulation winding; and carrying out secondary adjustment on the adjusted simulated power transformer structure according to the difference between the secondary simulation natural frequency and the preset excitation frequency to obtain the secondary adjusted simulated power transformer structure.
In one embodiment, the processor when executing the computer program further performs the steps of: and adjusting the first cushion block layer and the second cushion block layer according to the error between the actual natural frequency and the simulation natural frequency.
In one embodiment, the processor when executing the computer program further performs the steps of: if the simulation natural frequency is larger than the actual natural frequency, reducing the volume of the first cushion block layer and increasing the volume of the second cushion block layer; if the simulation natural frequency is smaller than the actual natural frequency, the volume of the first cushion block layer is increased, and the volume of the second cushion block layer is reduced.
In one embodiment, a computer readable storage medium is provided having a computer program stored thereon, which when executed by a processor, performs the steps of:
obtaining a simulated power transformer structure, wherein the simulated power transformer structure comprises a simulated winding and simulated insulating cushion blocks positioned between wire cakes of the simulated winding, the simulated insulating cushion blocks comprise a first cushion block layer and a second cushion block layer, and the first cushion block layer is larger than the second cushion block layer; performing simulation calculation aiming at the structure of the simulation power transformer to obtain the simulation natural frequency of the simulation winding; and adjusting the first cushion block layer and the second cushion block layer according to the difference between the simulation natural frequency and the preset excitation frequency of the simulation winding to obtain an adjusted simulation power transformer structure, wherein the adjusted simulation power transformer structure is used for manufacturing a power transformer.
In one embodiment, the computer program when executed by the processor further performs the steps of: determining a target simulation natural frequency and a target preset excitation frequency from a plurality of simulation natural frequencies and a plurality of preset excitation frequencies according to the difference between each simulation natural frequency and each preset excitation frequency, wherein the difference between the target simulation natural frequency and the target preset excitation frequency is minimum; and adjusting the first cushion block layer and the second cushion block layer according to the target simulation natural frequency and the target preset excitation frequency.
In one embodiment, the computer program when executed by the processor further performs the steps of: if the target simulation natural frequency is larger than the target preset excitation frequency, increasing the volume of the first cushion block layer and reducing the volume of the second cushion block layer; if the target simulation natural frequency is smaller than the target preset excitation frequency, the volume of the first cushion block layer is reduced, and the volume of the second cushion block layer is increased.
In one embodiment, the computer program when executed by the processor further performs the steps of: performing simulation calculation aiming at the vibration response characteristic of the simulated power transformer structure to obtain a characteristic curve of the simulated power transformer structure; and determining the natural frequency of the simulation winding according to the characteristic curve.
In one embodiment, the computer program when executed by the processor further performs the steps of: measuring the actual natural frequency of the winding of the manufactured power transformer; according to the error between the actual natural frequency and the simulation natural frequency, adjusting the structure of the simulation power transformer; performing simulation calculation on the adjusted simulated power transformer structure to obtain a secondary simulation natural frequency of the simulation winding; and carrying out secondary adjustment on the adjusted simulated power transformer structure according to the difference between the secondary simulation natural frequency and the preset excitation frequency to obtain the secondary adjusted simulated power transformer structure.
In one embodiment, the computer program when executed by the processor further performs the steps of: and adjusting the first cushion block layer and the second cushion block layer according to the error between the actual natural frequency and the simulation natural frequency.
In one embodiment, the computer program when executed by the processor further performs the steps of: if the simulation natural frequency is larger than the actual natural frequency, reducing the volume of the first cushion block layer and increasing the volume of the second cushion block layer; if the simulation natural frequency is smaller than the actual natural frequency, the volume of the first cushion block layer is increased, and the volume of the second cushion block layer is reduced.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the various embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in M forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (SyMchlimk) DRAM (SLDRAM), memory bus (RaMbus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (8)
1. A method of damping a winding of a power transformer, the method comprising:
the method comprises the steps of obtaining a simulated power transformer structure, wherein the simulated power transformer structure comprises a simulated winding and simulated insulating cushion blocks positioned between wire cakes of the simulated winding, the simulated insulating cushion blocks comprise a first cushion block layer and a second cushion block layer, and the rigidity of the first cushion block layer is larger than that of the second cushion block layer;
Performing simulation calculation on the simulation power transformer structure to obtain a simulation natural frequency of the simulation winding;
determining a target simulation natural frequency and a target preset excitation frequency from a plurality of simulation natural frequencies and a plurality of preset excitation frequencies according to the difference between each simulation natural frequency and each preset excitation frequency; the target simulation natural frequency and the target preset excitation frequency have the smallest difference, the simulation natural frequency is multiple, and the preset excitation frequency is multiple;
if the target simulation natural frequency is larger than the target preset excitation frequency, the volume of the first cushion block layer is increased, the volume of the second cushion block layer is reduced, and if the target simulation natural frequency is smaller than the target preset excitation frequency, the volume of the first cushion block layer is reduced, the volume of the second cushion block layer is increased, so that an adjusted simulation power transformer structure is obtained, and the adjusted simulation power transformer structure is used for manufacturing a power transformer.
2. The method of claim 1, wherein said performing a simulation calculation on said simulated power transformer structure results in a simulated natural frequency of said simulated winding, comprising:
Performing simulation calculation on the vibration response characteristic of the simulation power transformer structure to obtain a characteristic curve of the simulation power transformer structure;
and determining the natural frequency of the simulation winding according to the characteristic curve.
3. The method according to claim 1, wherein the method further comprises:
measuring the actual natural frequency of the winding of the manufactured power transformer;
according to the error between the actual natural frequency and the simulation natural frequency, adjusting the structure of the simulation power transformer;
performing simulation calculation on the adjusted simulated power transformer structure to obtain a secondary simulation natural frequency of the simulation winding;
and carrying out secondary adjustment on the adjusted simulated power transformer structure according to the difference between the secondary simulation natural frequency and the preset excitation frequency to obtain a secondary adjusted simulated power transformer structure.
4. A method according to claim 3, wherein said adjusting said simulated power transformer structure based on an error between said actual natural frequency and said simulated natural frequency comprises:
and adjusting the first cushion block layer and the second cushion block layer according to the error between the actual natural frequency and the simulation natural frequency.
5. The method of claim 4, wherein adjusting the first cushion layer and the second cushion layer based on the error between the actual natural frequency and the simulated natural frequency comprises:
if the simulation natural frequency is larger than the actual natural frequency, reducing the volume of the first cushion block layer and increasing the volume of the second cushion block layer;
and if the simulation natural frequency is smaller than the actual natural frequency, increasing the volume of the first cushion block layer and reducing the volume of the second cushion block layer.
6. A vibration damping device for a power transformer winding, the device comprising:
the device comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring a simulated power transformer structure, the simulated power transformer structure comprises a simulated winding and insulating cushion blocks positioned between wire cakes of the simulated winding, the insulating cushion blocks comprise a first cushion block layer and a second cushion block layer, and the rigidity of the first cushion block layer is greater than that of the second cushion block layer;
the simulation module is used for performing simulation calculation on the simulation power transformer structure to obtain the simulation natural frequency of the simulation winding;
the determining module is used for determining a target simulation natural frequency and a target preset excitation frequency from a plurality of simulation natural frequencies and a plurality of preset excitation frequencies according to the difference between each simulation natural frequency and each preset excitation frequency; the target simulation natural frequency and the target preset excitation frequency have the smallest difference, the simulation natural frequency is multiple, and the preset excitation frequency is multiple;
The first adjusting module is used for increasing the volume of the first cushion block layer and reducing the volume of the second cushion block layer if the target simulation natural frequency is larger than the target preset excitation frequency, reducing the volume of the first cushion block layer and increasing the volume of the second cushion block layer if the target simulation natural frequency is smaller than the target preset excitation frequency so as to obtain an adjusted simulation power transformer structure, and the adjusted simulation power transformer structure is used for manufacturing a power transformer.
7. A computer device comprising a memory and a processor, the memory storing a computer program which, when executed by the processor, implements a method of damping a winding of a power transformer as claimed in any one of claims 1 to 5.
8. A computer-readable storage medium, on which a computer program is stored which, when executed by a processor, implements a method of damping a winding of a power transformer as claimed in any one of claims 1 to 5.
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| US20160285265A1 (en) * | 2015-03-25 | 2016-09-29 | Eleon Energy, Inc. | Methods and systems for power restoration planning employing simulation and a frequency analysis test |
| CN107239596B (en) * | 2017-04-27 | 2020-10-16 | 株洲中车时代电气股份有限公司 | Finite element simulation model construction method for rail transit vehicle transformer |
| CN110805647B (en) * | 2019-10-24 | 2024-01-12 | 绍兴建元电力集团有限公司大兴电力承装分公司 | Composite vibration isolation device installed inside transformer oil tank and design method |
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