CN105527510A - Simulated test platform for axial winding deformation of transformer - Google Patents
Simulated test platform for axial winding deformation of transformer Download PDFInfo
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- CN105527510A CN105527510A CN201510648913.9A CN201510648913A CN105527510A CN 105527510 A CN105527510 A CN 105527510A CN 201510648913 A CN201510648913 A CN 201510648913A CN 105527510 A CN105527510 A CN 105527510A
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Abstract
The invention belongs to a research platform of winding deformation test for a transformer, especially to a physical simulation platform for the axial winding deformation of an oil-immersed transformer. According to a present winding deformation test platform in labs, the transformer winding is processed, including simple shift, access to a capacitor and short circuit of a turn, to simulate onsite winding deformation, an oil tank and an iron core of the transformer are not changed, the present platform is not flexible or accurate enough and is hard to simulate deformation in different shapes, positions and ranges conveniently; and when a deformed part or capacitor is replaced, the winding needs to be removed from the oil tank and causes much trouble. Distributed capacitance change caused by axial deformation of the winding is changed into distributed capacitance change caused by deformation of the oil tank, the positions of deformation blocks (6) are changed, namely, the deformed part of the winding is changed or the deformation range and degree of the winding are changed, and axial deformation of the winding is simulated simply.
Description
Technical field
The invention belongs to a kind of deformation test of transformer winding research platform, particularly about the physical simulation platform of oil-immersed power transformer axis of winding distortion.
Background technology
Deformation of transformer winding refers to that irreversible change occurs for the size of winding or shape under the effect of electric power and mechanical force.It comprises the change of axis and radial dimension, the displacement of device body, winding distortion, bulge and turn-to-turn short circuit etc.In addition, winding deformation also has cumulative effect, that is: after standing first short circuit rush of current, Transformer Winding is not damaged immediately, only has less permanent strain, but causes its insulating property and mechanical property to decline.When upper once short-circuit current rush, winding deformation can be made to aggravate, occur vicious cycle.Thus the transformer of existing winding deformation is a kind of accident potential, if run into larger excess current effect during operation again, then the major accidents such as transformer damage may occur.Current transformer phase winding deformation fault, one of major failure becoming transformer, therefore, must carry out deformation detection to Transformer Winding and diagnose its deformation extent, carry out the preventative maintenance of transformer according to this.
For this reason, need the feasible detection method of science of studying and defining to realize the detection of deformation of transformer winding, in the world the research work of a lot of country all to deformation of transformer winding detection method drops into a large amount of energy, whether stopped transport according to transformer, point on-line monitoring and offline inspection.Wherein, the most frequently used winding deformation detection method is method of frequency response method.After Transformer Winding deforms, the parameter such as inductance, ground capacitance, turn-to-turn capacitance of winding can change.The principle of work of method of frequency response method is exactly the frequency response curve by winding, the reflection distributed inductance of winding and the change of distributed capacitance, and then judges whether winding deforms.
, all there is the problem that diagnostic method is perfect not in current winding deformation detection method, needs sensitivity, the accuracy of furtheing investigate Detection and diagnosis method, and determine the localization method being out of shape position.Carry out above-mentioned research and be unable to do without verification experimental verification.
The platform used in traditional winding deformation detection experiment research, a kind of is derive from the transformer that there occurs winding deformation that transformer factory reprocesses, and a kind of is test platform in laboratory.Existing laboratory winding deformation test platform, all by processing simulated field winding deformation to Transformer Winding, and oil tank of transformer and iron core remain unchanged.Disposal route comprises certain two circle coil short in winding, accesses capacitor between certain two circle coil, increases the distance between line cake, mobile winding to change winding to distance of fuel tank etc., and then make the distributed inductance of winding, electric capacity changes, and then reaches the object of simulation winding practical distortion.
The principal mode of the axial deformation of Transformer Winding be axial torsion, axial compression (such as, fall cake cake spacing is reduced), axial elongation (such as, pressing plate loosen, cake spacing increase) etc., concrete deformed shape is changeable, and distortion position and range size are not all fixed.Simple shift, process such as access capacitor, short-circuited turn etc. are carried out to winding, underaction, accurately, be difficult to the distortion of simulating various shape, position, scope easily, and when carrying out the replacing distortion operation such as position, capacitor, winding is needed to take out from fuel tank, bother very much, thus greatly constrain efficiency and the effect of the experimental study of winding deformation detection method, limit development and the raising of winding deformation detection technique.
Summary of the invention
In view of this, the invention provides a kind of Transformer Winding axial deformation analogue test platform, can the various shape of convenient and swift simulation, position, scope axis of winding distortion.This platform is made up of winding (1), fuel tank (2), sleeve pipe (3), sleeve pipe (4), push rod (5), deformation block (6), motive seal mechanism (7).
It is inner that winding (1) is placed on fuel tank (2), and the high-voltage connection of winding (1) drawn fuel tank (2) by sleeve pipe (3), by sleeve pipe (4), the neutral point of winding (1) lead-in wire is drawn fuel tank (2).
Deformation block (6) is arranged on the end of push rod (5); Push rod (5) is arranged on fuel tank (2) top cover by motive seal mechanism (7); Push rod (5) can stretch, thus deformation block (6) can be driven to move up and down in winding (1), and then changes the relative position between deformation block (6) and winding (1).
Material, the structure of winding (1) are identical with the winding of oil-immersed power transformer; The material of fuel tank (2) is identical with the fuel tank of oil-immersed power transformer; The material of push rod (5) is insulator; The material of deformation block (6) is magnetic material.
The shape of deformation block (6) and size make according to the winding deformation shape that will simulate and scope, thus make the problem of winding (1) the distributed inductance change intending research change into the problem changed due to the existence of deformation block (6).
Compared with prior art, beneficial effect of the present invention is: 1, for method of frequency response method the most frequently used at present, and Transformer Winding axial deformation main manifestations is the change of the distributed inductance of winding, is embodied in the change of low frequency, Mid Frequency frequency response curve.The present invention changes by axis of winding being out of shape the distributed inductance caused the distributed inductance change being converted into distortion unshakable in one's determination and causing, and reaches the effect of simulation winding deformation very easily.And the concrete shape of distortion unshakable in one's determination, scope and position all can be simulated by the shape size of deformation block (6) and position.The change in location of deformation block (6) can be passed through push rod (5) and change easily.Deformation block (6) also can carry out processing and changing according to the shape of various distortion.
2, the existing winding deformation test platform based on processing winding, when changing deformation, must hang out winding, putting back to fuel tank again after completing the process to winding from fuel tank.Due to winding and fuel tank heavier, need to employ hoisting device; Transformer oil in fuel tank needs first to reclaim to be filled with again, and operation is also very loaded down with trivial details.And the analogue test platform that the present invention proposes, rely on push rod (5) to change the position of deformation block (6), be equivalent to change the position of winding deformation or change scope and the deformation extent of winding deformation.Push rod (5) is fixed on fuel tank (2) by motive seal mechanism (7), ensure that the sealing of fuel tank (2), and then is not needing to open the change achieving distortion position, deformation extent under fuel tank takes out the condition of winding.
Therefore, analogue test platform proposed by the invention, can very convenient, the various possible axial deformation of analogue transformer winding exactly, research for winding deformation detection method provides a kind of very convenient, accurate, meticulous experimental study platform, is very beneficial for carrying out the research of the sensitivity of winding deformation detection method, accuracy and deformation position localization method.
Accompanying drawing explanation
Fig. 1 is a kind of equivalence principle schematic diagram of Transformer Winding axial deformation analogue test platform.
Fig. 2 is a kind of structural representation of Transformer Winding axial deformation analogue test platform.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
As Fig. 2, an analogue test platform for deformation of transformer winding, is made up of the 110kV winding (1) of a real power transformer, oil tank of transformer (2), 110kV bushing (3), 10kV low-tension bushing (4), epoxy resin fiberglass rod push rod (5), soft magnetic ferrite deformation block (6) and motive seal mechanism (7).The wherein height 1080mm of winding, overall diameter 1150mm; Fuel tank (2) is square box, and material is iron.Between winding (1) and fuel tank (2), minimum clearance is 240mm; Motive seal mechanism (7) comprises the through flange of oil tank wall and O type rubber seal, can ensure easily to control push rod (5) to stretch into or exit winding (1) to be placed on fuel tank (2) inner, and the high-voltage connection of winding (1) be drawn fuel tank (2) by sleeve pipe (3), by sleeve pipe (4), the neutral point of winding (1) lead-in wire is drawn fuel tank (2).Deformation block (6) is arranged on the end of push rod (5); Push rod (5) is arranged on fuel tank (2) top cover by motive seal mechanism (7); Push rod (5) can stretch, thus deformation block (6) can be driven to move up and down in winding (1), and then changes the relative position between deformation block (6) and winding (1).
The shape of deformation block (6) and size make according to the winding deformation shape that will simulate and scope, thus the problem that the distributed inductance of the winding (1) intending research is changed because winding (1) deforms changes into the problem changed due to the existence of deformation block (6).
This embodiment, may be used for off-line simulation test 110kV oil-filled transformer being carried out to axis of winding deformation detection in laboratory, that is, the extension line ground connection of sleeve pipe (4), the extension line of sleeve pipe (3) is not connected with high-voltage conducting wires, is only connected with winding deformation detecting instrument; Also may be used for the online simulation test in laboratory, 110kV oil-filled transformer being carried out to axis of winding deformation detection, that is, the extension line ground connection of sleeve pipe (4), the extension line of sleeve pipe (3) is connected with high-voltage conducting wires, is not connected with winding deformation detecting instrument.
The use step of the present embodiment is as follows:
Step 1: according to deformation of transformer winding offline inspection or live monitoring method, is connected to the corresponding connecting portion in this embodiment by the lead-in wire of winding deformation detecting instrument;
Step 2: deformation block (6) is moved to winding overhang, and as far as possible near fuel tank, that is, make deformation block (6) impact on winding inductance minimum;
Step 3: the frequency response curve measuring winding, reference curve when not being out of shape as winding;
Step 4: movement and deformation block (6) to the position of intending distortion, thus utilizes deformation block (6) to increase the distributed inductance of this position winding;
Step 5: the frequency response curve measuring winding, as measured curve during winding deformation;
Step 6: contrast measured curve and reference curve, asks for the difference between curve, the corresponding relation between the position studying this difference and deformation block (6).
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or equivalent replacement, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed in the middle of right of the present invention.
Claims (2)
1. a Transformer Winding axial deformation analogue test platform, is characterized in that, this platform is made up of winding (1), fuel tank (2), sleeve pipe (3), sleeve pipe (4), push rod (5), deformation block (6), motive seal mechanism (7); It is inner that winding (1) is placed on fuel tank (2), and the high-voltage connection of winding (1) drawn fuel tank (2) by sleeve pipe (3), by sleeve pipe (4), the neutral point of winding (1) lead-in wire is drawn fuel tank (2); Deformation block (6) is arranged on the end of push rod (5); Push rod (5) is arranged on fuel tank (2) top cover by motive seal mechanism (7); Push rod (5) can stretch, thus deformation block (6) can be driven to move up and down in winding (1), and then changes the relative position between deformation block (6) and winding (1).
2. a kind of Transformer Winding axial deformation analogue test platform according to claim 1, is characterized in that, material, the structure of winding (1) are identical with the winding of oil-immersed power transformer; The material of fuel tank (2) is identical with the fuel tank of oil-immersed power transformer; The material of push rod (5) is insulator; The material of deformation block (6) is magnetic material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510648913.9A CN105527510B (en) | 2015-10-08 | 2015-10-08 | A kind of transformer winding axial deformation analogue test platform |
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| CN201510648913.9A CN105527510B (en) | 2015-10-08 | 2015-10-08 | A kind of transformer winding axial deformation analogue test platform |
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| CN105527510A true CN105527510A (en) | 2016-04-27 |
| CN105527510B CN105527510B (en) | 2018-05-18 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106816291A (en) * | 2017-04-13 | 2017-06-09 | 云南电网有限责任公司电力科学研究院 | A kind of distribution transformer for simulating short circuit in winding state |
| CN107015077A (en) * | 2017-02-23 | 2017-08-04 | 广西电网有限责任公司电力科学研究院 | A kind of deformation of transformer winding analogue means |
| CN110376453A (en) * | 2019-06-23 | 2019-10-25 | 西南交通大学 | A kind of transformer winding radial deformation fault simulation platform and application method |
| CN111983364A (en) * | 2020-08-26 | 2020-11-24 | 西南交通大学 | Oscillatory wave test platform and method under axial displacement of winding |
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| CN107015077A (en) * | 2017-02-23 | 2017-08-04 | 广西电网有限责任公司电力科学研究院 | A kind of deformation of transformer winding analogue means |
| CN106816291A (en) * | 2017-04-13 | 2017-06-09 | 云南电网有限责任公司电力科学研究院 | A kind of distribution transformer for simulating short circuit in winding state |
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| CN110376453A (en) * | 2019-06-23 | 2019-10-25 | 西南交通大学 | A kind of transformer winding radial deformation fault simulation platform and application method |
| CN111983364A (en) * | 2020-08-26 | 2020-11-24 | 西南交通大学 | Oscillatory wave test platform and method under axial displacement of winding |
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| CN105527510B (en) | 2018-05-18 |
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