CN105526835A - Simulated test platform for radial winding deformation of transformer - Google Patents
Simulated test platform for radial winding deformation of transformer Download PDFInfo
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- CN105526835A CN105526835A CN201510643965.7A CN201510643965A CN105526835A CN 105526835 A CN105526835 A CN 105526835A CN 201510643965 A CN201510643965 A CN 201510643965A CN 105526835 A CN105526835 A CN 105526835A
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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 radial 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 radial 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 radial 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 winding radial deformation.
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 radial deformation of Transformer Winding is bulge and depression, and 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 radial deformation analogue test platform, can the various shape of convenient and swift simulation, position, scope winding radial deformation.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) madial wall or on fuel tank (2) top cover by motive seal mechanism (7); Push rod (5) can stretch, thus can drive motion in the space of deformation block (6) between winding (1) and fuel tank (2), 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 metallic conductor; The material of deformation block (6) is identical with the fuel tank of oil-immersed power transformer.
Deformation block (6) is electrically connected by push rod (5) and fuel tank (2).
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 winding (1) plan studied becomes to change due to the existence of deformation block (6) to the problem equivalence that the distributed capacitance of fuel tank (2) changes because winding (1) deforms.
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 radial deformation main manifestations is the change of winding to the distributed capacitance of fuel tank, is embodied in the change of intermediate frequency, high band frequency response curve.The present invention is converted into fuel tank by the distributed capacitance change caused by winding radial deformation and is out of shape the distributed capacitance change caused, and the effect reaching simulation winding deformation very easily reaches the effect of simulation winding deformation very easily.Because deformation block (6) and fuel tank (2) are electrically connected, the concrete shape that fuel tank is out of shape, scope and position all can be realized 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 radial 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 radial deformation analogue test platform.
Fig. 2 is a kind of structural representation of Transformer Winding radial 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), duralumin push rod (5), irony 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 that easily controlling push rod (5) stretches into or exit
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) madial wall or on fuel tank (2) top cover by motive seal mechanism (7); Push rod (5) can stretch, thus can drive motion in the space of deformation block (6) between winding (1) and fuel tank (2), and then changes the relative position between deformation block (6) and winding (1); Deformation block (6) is electrically connected by push rod (5) and fuel tank (2).
The shape of deformation block (6) and size make according to the winding deformation shape that will simulate and scope, thus make the winding (1) intending research change into the problem changed due to the existence of deformation block (6) to the problem that the distributed capacitance of fuel tank (2) changes because winding (1) deforms; The profile of deformation block (6) takes fillet, makes it partial discharge phenomenon can not occur when winding ceiling voltage is in 63kV; When winding is in electriferous state, the distance between deformation block (6) and winding meets electric insulation requirement.
This embodiment, may be used for off-line simulation test 110kV oil-filled transformer being carried out to the detection of winding radial deformation 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 the detection of winding radial deformation, 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 the impact of deformation block (6) on winding stray capacitance over the ground 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, near winding, thus utilizes deformation block (6) to increase the ground capacitance 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 (3)
1. a Transformer Winding radial 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) madial wall or on fuel tank (2) top cover by motive seal mechanism (7); Push rod (5) can stretch, thus can drive motion in the space of deformation block (6) between winding (1) and fuel tank (2), and then changes the relative position between deformation block (6) and winding (1); Deformation block (6) is electrically connected by push rod (5) and fuel tank (2).
2. a kind of Transformer Winding radial 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 metallic conductor; The material of deformation block (6) is identical with the fuel tank of oil-immersed power transformer.
3. a kind of Transformer Winding radial deformation analogue test platform according to claim 1, it is characterized in that, 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 winding (1) plan studied becomes to change due to the existence of deformation block (6) to the problem equivalence that the distributed capacitance of fuel tank (2) changes because winding (1) deforms.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510643965.7A CN105526835B (en) | 2015-10-08 | 2015-10-08 | A kind of transformer winding radial deformation analogue test platform |
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| CN201510643965.7A CN105526835B (en) | 2015-10-08 | 2015-10-08 | A kind of transformer winding radial deformation analogue test platform |
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| CN105526835A true CN105526835A (en) | 2016-04-27 |
| CN105526835B CN105526835B (en) | 2018-05-18 |
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Cited By (8)
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| CN106093669A (en) * | 2016-08-24 | 2016-11-09 | 山东鲁能泰山电力设备有限公司 | The experimental provision of a kind of analogue transformer short circuit and method |
| CN106707064A (en) * | 2016-12-31 | 2017-05-24 | 西南交通大学 | Research platform of relevance between radial pressure and frequency response of winding and experiment method thereof |
| CN106771621A (en) * | 2016-12-31 | 2017-05-31 | 西南交通大学 | A kind of adjustable Transformer Winding testing impedance platform of radial pressure |
| 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 |
| CN110161352A (en) * | 2019-04-29 | 2019-08-23 | 云南电网有限责任公司电力科学研究院 | Frequency response test device and method under analogue transformer winding interturn short-circuit |
| 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 |
| CN110376454A (en) * | 2019-06-23 | 2019-10-25 | 西南交通大学 | Winding radial deformation and oscillation wave relevance research platform and its test method |
| CN113092269A (en) * | 2021-04-01 | 2021-07-09 | 浙江方圆电气设备检测有限公司 | Pressure deformation testing method for liquid-immersed transformer |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093669A (en) * | 2016-08-24 | 2016-11-09 | 山东鲁能泰山电力设备有限公司 | The experimental provision of a kind of analogue transformer short circuit and method |
| CN106707064A (en) * | 2016-12-31 | 2017-05-24 | 西南交通大学 | Research platform of relevance between radial pressure and frequency response of winding and experiment method thereof |
| CN106771621A (en) * | 2016-12-31 | 2017-05-31 | 西南交通大学 | A kind of adjustable Transformer Winding testing impedance platform of radial pressure |
| CN106771621B (en) * | 2016-12-31 | 2018-05-08 | 西南交通大学 | A kind of adjustable transformer winding testing impedance platform of radial pressure |
| 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 |
| CN106816291B (en) * | 2017-04-13 | 2018-06-29 | 云南电网有限责任公司电力科学研究院 | A kind of distribution transformer for simulating winding short circuit state |
| CN110161352A (en) * | 2019-04-29 | 2019-08-23 | 云南电网有限责任公司电力科学研究院 | Frequency response test device and method under analogue transformer winding interturn short-circuit |
| CN110161352B (en) * | 2019-04-29 | 2021-05-11 | 云南电网有限责任公司电力科学研究院 | Frequency response test device and method under condition of simulating turn-to-turn short circuit of transformer winding |
| 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 |
| CN110376454A (en) * | 2019-06-23 | 2019-10-25 | 西南交通大学 | Winding radial deformation and oscillation wave relevance research platform and its test method |
| CN110376454B (en) * | 2019-06-23 | 2024-04-26 | 西南交通大学 | Research platform for relevance of radial deformation of winding and oscillatory wave and test method thereof |
| CN113092269A (en) * | 2021-04-01 | 2021-07-09 | 浙江方圆电气设备检测有限公司 | Pressure deformation testing method for liquid-immersed transformer |
| CN113092269B (en) * | 2021-04-01 | 2024-03-12 | 浙江方圆电气设备检测有限公司 | Pressure deformation testing method for liquid immersion type transformer |
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