CN114089072A - Transformer winding deformation simulation device - Google Patents
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- 238000004804 winding Methods 0.000 title claims abstract description 65
- 238000004088 simulation Methods 0.000 title claims abstract description 32
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
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- 238000009413 insulation Methods 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/62—Testing of transformers
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Abstract
The invention discloses a transformer winding deformation simulation device which comprises a three-phase transformer, wherein the three-phase transformer comprises an A-phase transformer, a B-phase transformer and a C-phase transformer, and the A-phase transformer, the B-phase transformer and the C-phase transformer have the same structure and adopt a triangular connection mode; the lifting transmission mechanism is arranged at the bottom of one of the phases in the phase A transformer, the phase B transformer and the phase C transformer; the invention designs a set of device for simulating the transformer fault, and can simulate various times of transformer fault conditions through the change-over switch indoors, thereby effectively checking the use condition of the transformer and preventing cost waste caused by misdiagnosis.
Description
Technical Field
The invention relates to the technical field of industrial automation, in particular to a transformer winding deformation simulation device.
Background
The transformer suffers from the impact or the physical impact of various fault short-circuit currents, and under the action of strong electrodynamic force generated by the short-circuit currents, the transformer winding possibly loses stability, so that the permanent deformation phenomena such as local distortion, bulge or displacement are caused, the safe operation of the transformer is seriously affected, and therefore, the inspection of the winding condition of the transformer is indispensable. The most common method for transformer winding deformation test is a frequency response method, and through years of analysis of test data, the winding deformation test data shows that the performance evaluation effect is not good for the judgment of the transformer performance, so that misdiagnosis is frequently caused, and great loss is caused to enterprises. For example, a transformer which is not overhauled easily takes dozens of millions of times and is not obviously deformed after being disassembled. Therefore, based on this, a set of device is to be developed for simulating and diagnosing the phenomena of short circuit and open circuit between the layers and turn insulation of the transformer winding, longitudinal displacement, axial displacement, grounding of the iron core, grounding of the clamping piece and the like of the winding. Through the device, technical staff can set various types of faults, test fault waveforms and data, bring the fault waveforms and data into a typical fault data expert base, guide the technical staff to analyze and process various types of fault data more normatively, reduce the probability of misdiagnosis and missed diagnosis of the transformer and improve the maintenance quality of the transformer. And 3-5 expert talents with transformer maintenance capability are cultivated.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made in view of the problems occurring in the prior art.
Therefore, the technical problem to be solved by the present invention is that the transformer is subjected to the impact or physical impact of various fault short-circuit currents, and under the action of the strong electrodynamic force generated by the short-circuit currents, the transformer winding may lose stability, resulting in permanent deformation phenomena such as local distortion, bulge or displacement, which will seriously affect the safe operation of the transformer
In order to solve the technical problems, the invention provides the following technical scheme: a transformer winding deformation simulation device comprises a three-phase transformer, wherein the three-phase transformer comprises an A-phase transformer, a B-phase transformer and a C-phase transformer, and the A-phase transformer, the B-phase transformer and the C-phase transformer have the same structure and adopt a triangular connection mode; and the lifting transmission mechanism is arranged at the bottom of one of the phases in the phase A transformer, the phase B transformer and the phase C transformer.
As a preferable scheme of the transformer winding deformation simulation apparatus of the present invention, wherein: the phase-A transformer, the phase-B transformer and the phase-C transformer are all composed of iron cores and coil windings, and the coil windings are wound on the iron cores.
As a preferable aspect of the transformer winding deformation simulation apparatus of the present invention, wherein: and the phase A transformer, the phase B transformer and the phase C transformer are respectively sleeved with a shell.
As a preferable aspect of the transformer winding deformation simulation apparatus of the present invention, wherein: the phase A transformer, the phase B transformer and the phase C transformer are fixedly connected through clamping pieces.
As a preferable scheme of the transformer winding deformation simulation apparatus of the present invention, wherein: the iron core and the clamping piece are respectively connected to the control panel through wires.
As a preferable aspect of the transformer winding deformation simulation apparatus of the present invention, wherein: the coil winding is including high-pressure side and low-voltage side, high-pressure side and low-voltage side difference connection of electric lines ground connection on the control panel, the high-pressure side ground connection and the low-voltage side of coil winding on the A phase transformer connect local mode the same, and the high-pressure side is connected first branch and is established ties high resistance ground connection, parallelly connected second branch and third branch in first branch, the second branch is established ties low resistance ground connection, third branch is direct ground connection, and it has the switch to establish ties on first branch, second branch and the third branch.
As a preferable aspect of the transformer winding deformation simulation apparatus of the present invention, wherein: a first line, a second line and a third line are led out from the coil winding on the phase-A transformer, the first line, the second line and the third line are connected in parallel and led to a control panel, and impedances are arranged on the first line and the third line in series.
As a preferable aspect of the transformer winding deformation simulation apparatus of the present invention, wherein: the phase A transformer is connected to the control panel through impedance.
As a preferable aspect of the transformer winding deformation simulation apparatus of the present invention, wherein: the lifting transmission mechanism comprises a base, a rotating part, a first pipe and a second pipe, wherein a ring disc is arranged at the bottom of the coil winding, the first pipe and the second pipe are symmetrically arranged and communicated through a third pipe, one end of the first pipe and one end of the second pipe are butted with the bottom of the ring disc, the other end of the first pipe and one end of the second pipe are paved on the base, and the rotating part is rotatably arranged on the base and matched with the first pipe and the second pipe.
As a preferable aspect of the transformer winding deformation simulation apparatus of the present invention, wherein: the transmission mechanism further comprises two top supporting rods, the two top supporting rods are respectively arranged in the first pipe and the second pipe, and the top supporting rods respectively extend out of one end of the first pipe and one end of the second pipe and are matched with the bottom of the ring disc.
The invention has the beneficial effects that: the invention designs a set of device for simulating transformer faults, which can simulate various transformer fault times indoors through the change-over switch so as to effectively check the use condition of the transformer and prevent cost waste caused by misdiagnosis.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
fig. 1 is a circuit diagram of a three-phase transformer in a first embodiment.
Fig. 2 is a circuit diagram of an axial displacement fault simulation in the first embodiment.
Fig. 3 is a circuit diagram showing a simulation circuit of an inter-turn short circuit between coil winding layers in the first embodiment.
Fig. 4 is a circuit diagram showing an open circuit simulation of the coil winding in the first embodiment.
Fig. 5 is a circuit diagram of a high-voltage ground fault simulation circuit of the transformer in the first embodiment.
Fig. 6 is a diagram showing the influence of a transformer accident in the first embodiment.
Fig. 7 is a structural view of an elevating transmission mechanism in a second embodiment.
Fig. 8 is an exploded view of the elevating drive mechanism in the second embodiment.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1
Referring to fig. 1 to 6, a first embodiment of the present invention provides a transformer winding deformation simulation apparatus, which includes a three-phase transformer 100 and a lifting transmission mechanism 200.
The three-phase transformer 100 includes an a-phase transformer 101, a B-phase transformer 102, and a C-phase transformer 103, where the a-phase transformer 101, the B-phase transformer 102, and the C-phase transformer 103 have the same structure and are connected in a triangular manner.
The three-phase transformer 100 can be used for simulating and diagnosing the phenomena of insulation short circuit and open circuit between layers and turns of a transformer winding, longitudinal displacement, axial displacement, iron core grounding, clamping piece grounding and the like of the winding. As shown in fig. 6, when the transformer is subjected to external force, overall transformation and local deformation may impact the inductor and the capacitor to a certain extent, so that the magnitude of the inductor and the capacitor may change, and the resonant frequency may be affected, thereby affecting the normal operation of the whole power grid.
Further, the lifting transmission mechanism 200 is installed at the bottom of one of the phases in the a-phase transformer 101, the B-phase transformer 102 and the C-phase transformer 103, and the lifting transmission mechanism 200 can simulate a fault when the three-phase transformer 100 is displaced longitudinally when ascending and descending.
Further, the phase a transformer 101, the phase B transformer 102, and the phase C transformer 103 are each composed of a core 101a and a coil winding 101B, and the coil winding 101B is wound around the core 101 a. The phase A transformer 101, the phase B transformer 102 and the phase C transformer 103 are all sleeved with a shell 101C, the shell 101C can play a role in protecting the phase A transformer 101, the phase B transformer 102 and the phase C transformer 103, and meanwhile, the distance between the phase A transformer 101, the phase B transformer 102 and the phase C transformer 103 and the shell 101C changes when the shell 101C axially displaces, so that capacitance changes.
Further, in the axial displacement fault simulation circuit, the phase-a transformer 101 is connected to the control panel 105 through an impedance T, and the capacitance change of various conditions in the phase-a transformer 101 is controlled through a switch on the control panel 105, specifically, a first capacitor C1 is connected between the coil winding 101b and the casing 101C in the phase-a transformer 101, a second capacitor C2 is connected between the coil winding 101b, and a third capacitor C3 is connected between the core 101a and the casing 101C, the mounting lines of the first capacitor C1, the second capacitor C2 and the third capacitor C3 are all arranged in the control panel 105, and each mounting line of the first capacitor C1, the second capacitor C2 and the third capacitor C3 is provided with a switch. The distance between the coil winding 101b and the casing 101C can be simulated by controlling the size of the first capacitor C1, and the farther the distance, the larger the space capacitance; the second capacitor C2 can simulate the capacitance between the coil windings 101b, when the three-phase transformer 100 is heavily shocked and the coil windings 101b are sunken, the coil windings 101b will approach each other, and the capacitance is reduced; the third capacitor C3 simulates the distance between the core 101a and the case 101C, and the distance between the core 101a and the case 101C changes when the phase a transformer 101 moves in the axial direction.
In the short circuit simulation experiment, a high-voltage side K and a low-voltage side M are respectively connected to a control panel 105 through wires to be grounded, the grounding modes of the high-voltage side K and the low-voltage side M are the same, the high-voltage side K is connected with a first branch K-1 in series connection with a high-resistance ground, the first branch K-1 is connected with a second branch K-2 and a third branch K-3 in parallel, the second branch K-2 is connected with a low-resistance ground in series, the third branch K-3 is directly grounded, and switches are connected to the first branch K-1, the second branch K-2 and the third branch K-3 in series. The grounding of the low voltage side M is the same.
In the interlayer and turn-to-turn short circuit simulation experiment, the interlayer short circuit is a contact short circuit of two electric wires of the coil winding 101b, and the turn-to-turn short circuit is a contact short circuit of one metal electric wire inside the two electric wires of the coil winding 101 b. A first line 101b-1, a second line 101b-2 and a third line 101b-3 are led out from a coil winding 101b on the phase A transformer 101, the first line 101b-1, the second line 101b-2 and the third line 101b-3 are connected in parallel and led onto a control panel 105, and impedances T are respectively connected in series on the first line 101b-1 and the third line 101 b-3; the impedance T consists of a resistor and a capacitor, specifically, a first line 101b-1 is connected to one strand of the coil winding 101b, a second line 101b-2 is connected to the other strand of the coil winding 101b, and a third line 101b-3 is connected to one metal wire in one strand of the coil winding 101 b; the first line 101b-1, the second line 101b-2 and the third line 101b-3 are mutually connected in parallel, the impedance T is arranged on the first line 101b-1 and the third line 101b-3, interlayer and turn-to-turn short circuit is simulated by controlling the on-off of the first line 101b-1 and the third line 101b-3, and the interlayer short circuit is realized when the first line 101b-1 is connected and the third line 101b-3 is disconnected, and the turn-to-turn short circuit is realized otherwise.
Furthermore, two lines of the coil winding 101b are respectively led out to the control panel 105 and connected to the control panel 105 through a switch, and the open-circuit fault of the coil winding 101b can be simulated by controlling the on-off of the line switch.
Phase a transformer 101, phase B transformer 102 and phase C transformer 103 are fixedly connected by clip 104. The core 101a and the clip 104 are respectively connected to the control panel 105 through wires, thereby simulating a short circuit of the core 101a and a ground fault of the clip 104 through a switch.
Example 2
Referring to fig. 7 and 8, in a second embodiment of the present invention, which is based on the previous embodiment, the elevating transmission mechanism 200 includes a base 201, a rotating member 202, a first pipe 203 and a second pipe 204.
The bottom of the coil winding 101b is provided with a ring disc 101b-4, the first pipe 203 and the second pipe 204 are identical in structure, are symmetrically arranged in an L-shaped structure and are communicated through a third pipe 205, one end of each of the first pipe 203 and the second pipe 204 is butted with the bottom of the ring disc 101b-4, the other end of each of the first pipe 203 and the second pipe 204 is laid on the base 201, and the rotating piece 202 is rotatably arranged on the base 201 and is matched with the first pipe 203 and the second pipe 204; specifically, the first pipe 203 is vertically communicated with a horizontal pipe, the vertical pipe is vertically abutted to the bottom of the annular disc 101b-4, and the horizontal pipe is laid on the base 201, and the third pipe 205 is communicated with the vertical pipe of the first pipe 203 and the vertical pipe of the second pipe 204.
The transmission mechanism 200 further comprises two top struts 206, the two top struts 206 are respectively arranged in the first tube 203 and the second tube 204, and the top struts 206 respectively extend from one end in the first tube 203 and the second tube 204 and are matched with the bottoms of the ring discs 101 b-4.
Further, the horizontal pipes of the first pipe 203 and the second pipe 204 of the pipeline accommodating groove 201a arranged on the two sides of the base 201 are respectively laid in the pipeline accommodating groove 201a, the top support rods 206 are respectively positioned in the vertical pipes, the bottom of the ring disc 101b-4 is symmetrically provided with top support hole sites H, the top support rods 206 extend out of the vertical pipes and extend into the top support hole sites H, and the top support hole sites H are of a circular ring structure.
The rotating member 202 comprises a rotating shaft 202a, a connecting plate 202b and a pulley 202c, specifically, a protruding shaft 201b is arranged at the center of the base 201 in a protruding mode, the rotating shaft 202a is sleeved on the protruding shaft 201b and connected in a rotating mode, the connecting plate 202b is provided with a plurality of rotating shafts 202a, one end of each rotating shaft is fixedly connected with the outer wall of each rotating shaft 202a in a circumferential mode, the other end of each rotating shaft is connected with the pulley 202c, and when the rotating shafts 202a rotate, the pulley 202c partially extends into the pipeline accommodating grooves 201a on the two sides to extrude the first pipe 203 and the second pipe 204 clockwise or anticlockwise.
The water flows through the horizontal pipe in the first pipe 203, the water is pumped into the vertical pipe through the extrusion of the pulley 202c, the top support rods 206 are pushed to ascend, meanwhile, the two top support rods 206 are fixedly connected with each other through the connecting rod P, the two top support rods 206 ascend and descend together, then the water flows to the second pipe 204 from the third pipe 205, and finally flows out of the horizontal pipe of the second pipe 204. The water flow pressure can jack the ring plate 101b-4 up, serving to simulate a longitudinal displacement failure.
It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not have been described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. A transformer winding deformation simulation device is characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the three-phase transformer (100) comprises an A-phase transformer (101), a B-phase transformer (102) and a C-phase transformer (103), wherein the A-phase transformer (101), the B-phase transformer (102) and the C-phase transformer (103) have the same structure and adopt a triangular connection mode; and (c) a second step of,
the lifting transmission mechanism (200) is installed at the bottom of one of the phases in the phase A transformer (101), the phase B transformer (102) and the phase C transformer (103).
2. The transformer winding deformation simulation apparatus of claim 1, wherein: the phase A transformer (101), the phase B transformer (102) and the phase C transformer (103) are all composed of an iron core (101a) and a coil winding (101B), and the coil winding (101B) is wound on the iron core (101 a).
3. The transformer winding deformation simulation apparatus of claim 2, wherein: the phase A transformer (101), the phase B transformer (102) and the phase C transformer (103) are all sleeved with a shell (101C).
4. A transformer winding deformation simulation apparatus according to claim 2 or 3, wherein: the phase A transformer (101), the phase B transformer (102) and the phase C transformer (103) are fixedly connected through a clamping piece (104).
5. The transformer winding deformation simulation apparatus of claim 4, wherein: the iron core (101a) and the clamping piece (104) are respectively connected to a control panel (105) through wires.
6. The transformer winding deformation simulation apparatus of claim 2, wherein: the coil winding (101b) comprises a high-voltage side (K) and a low-voltage side (M), the high-voltage side (K) and the low-voltage side (M) are respectively connected to a control panel (105) through electric wires and are grounded, the grounding mode of the high-voltage side (K) and the grounding mode of the low-voltage side (M) of the coil winding (101b) on the phase-A transformer (101) are the same, the high-voltage side (K) is connected with a first branch circuit (K-1) and is grounded in series through a high resistor, the first branch circuit (K-1) is connected with a second branch circuit (K-2) and a third branch circuit (K-3) in parallel, the second branch circuit (K-2) and the third branch circuit (K-3) are connected with a low resistor and are grounded in series, the third branch circuit (K-3) is directly grounded, and the first branch circuit (K-1), the second branch circuit (K-2) and the third branch circuit (K-3) are connected with switches in series.
7. The transformer winding deformation simulation apparatus of claim 6, wherein: a first line (101b-1), a second line (101b-2) and a third line (101b-3) are led out from a coil winding (101b) on the phase-A transformer (101), the first line (101b-1), the second line (101b-2) and the third line (101b-3) are connected in parallel and led to a control panel (105), and impedances (T) are arranged on the first line (101b-1) and the third line (101b-3) in series.
8. The transformer winding deformation simulation apparatus of claim 7, wherein: the phase A transformer (101) is connected to the control panel (105) through a resistance (T).
9. The transformer winding deformation simulation apparatus of claim 2, wherein: the lifting transmission mechanism (200) comprises a base (201), a rotating part (202), a first pipe (203) and a second pipe (204), a ring disc (101b-4) is arranged at the bottom of a coil winding (101b), the first pipe (203) and the second pipe (204) are symmetrically arranged and communicated through a third pipe (205), one ends of the first pipe (203) and the second pipe (204) are butted with the bottom of the ring disc (101b-4), the other ends of the first pipe and the second pipe are paved on the base (201), and the rotating part (202) is rotatably arranged on the base (201) and matched with the first pipe (203) and the second pipe (204).
10. The transformer winding deformation simulation apparatus of claim 9, wherein: the transmission mechanism (200) further comprises two top supporting rods (206), the two top supporting rods (206) are respectively arranged in the first pipe (203) and the second pipe (204), and the top supporting rods (206) respectively extend out of one end in the first pipe (203) and the second pipe (204) and are matched with the bottoms of the ring discs (101 b-4).
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