CN203688675U - Test transformer of simulation three-phase transformer - Google Patents
Test transformer of simulation three-phase transformer Download PDFInfo
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- CN203688675U CN203688675U CN201320570371.4U CN201320570371U CN203688675U CN 203688675 U CN203688675 U CN 203688675U CN 201320570371 U CN201320570371 U CN 201320570371U CN 203688675 U CN203688675 U CN 203688675U
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Abstract
The utility model provides a test transformer of a simulation three-phase transformer, comprising an oil tank, a high voltage winding and a low voltage winding; the high-voltage winding possesses a high voltage sleeve and the low voltage winding possesses a low voltage sleeve; the head end and the tail end of the high voltage winding are led out by the high voltage sleeve to the top of the oil tank; the head end and the tail end of the low voltage winding are led out through the low voltage sleeve to the top of the oil tank; and the high voltage winding and the low voltage winding possess a tap for connecting to capacitors and inductors in series or in parallel to simulate various transformation modes of high voltage windings and low voltage windings. The test transformer of a simulation three-phase transformer disclosed by the utility model can simulate various deformation faults in the three-phase transformer through connecting the capacitors and the inductors in series or in parallel.
Description
Technical field
The utility model relates to power technology field, relates in particular to a kind of testing transformer of simulating three-phase transformer.
Background technology
Along with the continuous upgrading of electric system expands, the demand of various power equipments is also more and more.And traditional power transformer is as the visual plant in electric system, its failure rate is higher.If a large-scale power transformer is in operation and breaks down, will cause a regional large area, have a power failure for a long time, cause economic heavy losses, make troubles more can to people's life.In recent years, relevant statistical data shows, Transformer Winding is the power transformer more parts that break down, and national 110kv and above Class power transformer reach 50% of total number of accident because external short circuit fault causes the accident of damage, and the overwhelming majority is caused by deformation of transformer winding.
In order to find in time the accident potential of transformer, avoid burst accident, improve transformer reliability of operation, the research tool of carrying out Transformer Winding diagnostic method is of great significance.
In prior art, provide a kind of three-phase simulation transformer, for simulating winding deformation, to carry out the segment length's research about transformer winding fault.But the three-phase simulation transformer that prior art provides, its high pressure winding is provided with removable insole pieces, can carry out movement to a certain degree, for simulation winding deformation or defect, but the mode of this mechanical alteration winding construction cannot be restored, and the fault type that can simulate is limited; In addition, the leading-out terminal of this three-phase simulation transformer is fixed, and cannot carry out first and second side Δ/Y type changing-over, the concrete condition under the different joint group of analog machine; Again, general three-phase simulation transformer cannot solve low pressure tapping and draw problem, cannot carry out the simulation of three-phase low-voltage winding failure.
Utility model content
For solving the technical matters existing in prior art, the utility model provides a kind of testing transformer of simulating three-phase transformer, and it can simulate the inner various distortion faults that occur of three-phase transformer by the mode of connection in series-parallel capacitor and inductor.
The testing transformer of the simulation three-phase transformer that the utility model provides, comprising: fuel tank, low pressure winding and high pressure winding;
Described high pressure winding has bushing, and described low pressure winding has low-tension bushing;
The first and last end of described high pressure winding is drawn outlet to described top of oil-tank via described bushing, and the first and last end of described low pressure winding is drawn outlet to described top of oil-tank via described low-tension bushing;
Described high pressure winding and low pressure winding also have the tap for the form of distortion by connection in series-parallel capacitor and inductor simulation range transformer high pressure winding and low pressure winding.
Wherein, the tap of the low pressure winding of the testing transformer of described simulation three-phase transformer is connected to low pressure winding terminal block in addition.
Wherein, described fuel tank outer wall is also provided with the fuel outlet valve for the assay that regularly draws oil sample; Concrete described fuel outlet valve is arranged on the bottom, side of described fuel tank outer wall.
Wherein, described fuel tank outer wall is also provided with the operation window for revising experimental wiring; Concrete described operation window is positioned at the middle part, testing transformer front of described simulation three-phase transformer.
Wherein, described fuel tank outer wall is also provided with ground terminal; Described ground terminal is positioned at the positive basifacial of testing transformer of described simulation three-phase transformer, and it is connected with ground wire.
Wherein, described fuel tank outer wall is also provided with the pressure relief valve of automatic relief pressure in the time that the internal pressure of the testing transformer of described simulation three-phase transformer exceedes threshold value.
Implement the utility model, there is following beneficial effect:
The testing transformer of the simulation three-phase transformer that the utility model provides, its high pressure winding and low pressure winding are all drawn outlet, can carry out the flexible changing-over of Δ/Y type, are convenient to be determined by experiment the situation of change of winding frequency response curve under different joint group and fault condition;
The high pressure winding of the testing transformer of the simulation three-phase transformer that the utility model provides can evenly be extracted a large amount of taps vertically out, can carry out fault simulation;
In addition, the low pressure winding of the testing transformer of the simulation three-phase transformer that the utility model provides also can leading-out terminal, facilitates dependent failure simulation.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of the testing transformer embodiment mono-of the simulation three-phase transformer that Fig. 1 provides for the utility model.
The sleeve pipe outlet schematic diagram of high-low pressure winding in the testing transformer of the simulation three-phase transformer that Fig. 2 provides for the utility model.
The schematic diagram of in the testing transformer of the simulation three-phase transformer that Fig. 3 provides for the utility model, the tap of high pressure winding being extracted out.
The schematic diagram of in the testing transformer of the simulation three-phase transformer that Fig. 4 provides for the utility model, the tap of low pressure winding being extracted out.
The structural representation of the testing transformer embodiment bis-of the simulation three-phase transformer that Fig. 5 provides for the utility model.
Embodiment
Referring to Fig. 1, the structural representation of the testing transformer embodiment mono-of the simulation three-phase transformer providing for the utility model.
The testing transformer of the simulation three-phase transformer that the present embodiment one provides, comprising: fuel tank 1, high pressure winding 21, low pressure winding 22; It should be noted that, high pressure winding 21 and low pressure winding 22 are all positioned at the inside of the testing transformer of simulation three-phase transformer, outside and invisible, therefore also not shown in Fig. 1.
High pressure winding 21 has bushing 210, and low pressure winding 22 has low-tension bushing 220; This bushing 210 and low-tension bushing 220 are exposed in the testing transformer outside of simulation three-phase transformer, are visible part.Bushing 210 and low-tension bushing 220 are staggered each other.
In order to solve Δ/Y type problem of switching flexibly in transformer experimentation, high-low pressure winding in the testing transformer of the simulation three-phase transformer that the utility model provides has done particular design, be specially its first and last end is drawn to outlet through sleeve pipe respectively, specifically refer to Fig. 2.It should be noted that, the outlet of drawing from bushing 210 and low-tension bushing 220 in the utility model and the outlet of drawing from the tap of high pressure winding 21 and low pressure winding 22 are at the testing transformer box house that is arranged in simulation three-phase transformer, invisible in the drawings.
As shown in Figure 2, the first and last end of high pressure winding 21 is drawn outlet 3 to fuel tank 1 top via bushing 210, the first and last end of low pressure winding 22 is drawn outlet 3 to fuel tank 1 top (the testing transformer box house of the simulation three-phase transformer of this outlet 3 via low-tension bushing 220, outside invisible, Fig. 2 is only how to draw outlet 3 from bushing 210 and low-tension bushing 220 at the testing transformer box house of simulation three-phase transformer for what illustrate); The outlet 3 of drawing via bushing 210 and the outlet 3 of drawing via low-tension bushing 220 are changed for carrying out Δ/Y type, to simulate the accident defect under different joint group.In the present embodiment, the leading-out terminal of high pressure winding and low pressure winding amounts to 12.
In order to simulate the accident defect of different situations, the testing transformer of simulation three-phase transformer of the present utility model also designs high pressure winding and low pressure winding, specifically referring to Fig. 3.
As shown in Figure 3, what the high pressure winding 21 in the utility model adopted is disc type winding, for the failure condition of higher grade of analog voltage transformer.
The high pressure tapping 211 of high pressure winding 21 is from high pressure winding 21 is evenly extracted out from top to bottom, and in vacant state, this tap 211 is for simulating range transformer winding deformation form by connection in series-parallel capacitor and inductor.In the present embodiment, in the three-phase of the testing transformer of simulation three-phase transformer, each all draws 50 taps mutually, can be for carrying out various winding deformation simulated experiments.
In addition, the low pressure winding of transformer is between iron core and high pressure winding, conventionally cannot directly operate on it, the accident defect that may occur in order to simulate low pressure winding, the utility model by the tap of low pressure winding in a certain order, be wired to the terminal block outside low pressure winding, to facilitate experimental implementation, specifically refer to Fig. 4.
As shown in Figure 4, the tap 40 of the low pressure winding of the testing transformer of simulation three-phase transformer is from low pressure winding 22 is evenly extracted out from top to bottom, be connected to the testing transformer box house of low pressure winding 22 this terminal block of terminal block 5(in addition at simulation three-phase transformer, only after the outer cover of the testing transformer of simulation three-phase transformer is sling, just visible, Fig. 4 is only for signal goes between to the situation of terminal block 5 from the tap 40 of low pressure winding 220), the accident defect that the shunt-wound capacitance inductance of going here and there between the tap 40 of low pressure winding 22 simulation low pressure winding produces.
The tap 40 of the testing transformer A, the B that are simulation three-phase transformer being arranged above and below successively on terminal block 5, the low pressure winding 4 of C three-phase.
To sum up, because general transformer only has each 3 sleeve pipes of high-low pressure, the concrete joint group of winding determines at the beginning of design, cannot change, the utility model is drawn (totally 12 outlet casing tubes), flexible transformation wiring as required by the first and last end of each height winding via outlet casing tube; In addition, the local deformation of transformer must cause that corresponding distributed capacitance inductance changes, thereby can simulate most of fault by going here and there the mode of shunt-wound capacitance inductance between the tap of drawing at high pressure winding, carries out correlative study; Again, due to the restriction of locus, inconvenience directly operates low pressure winding, and the utility model selects low pressure tapping to cause the engineering processing of external cabling plate, has well solved this problem.
Therefore, the testing transformer of the simulation three-phase transformer that the utility model provides can be simulated the inner various distortion faults that occur of three-phase transformer by the mode of connection in series-parallel capacitor and inductor, as the displacement of winding local radial, axial compression, winding interturn short-circuit etc.; And can inject swept-frequency signal to outlet casing tube and further investigate frequency response curve feature under its malfunction, lay the first stone for setting up relevant criterion.
All kinds that the testing transformer of the simulation three-phase transformer that the utility model provides can occur in laboratory simulation actual motion, in various degree and the fault of diverse location, for example, in the time of transformer phase winding generation radial displacement, to there is significant change with transformer case, iron core and other sound alternate electric capacity in mobile part, at this moment, only need and engage between the tap of the testing transformer correspondence position of simulation three-phase transformer and ground and adjacent winding and fit capacitor and inductor; And for example, in the time that Transformer Winding, under short-circuit current effect, Local Contraction occurs, can be equivalent to faulty component axis of winding length and shorten, its self-induction and corresponding distributed capacitance will change, and can carry out similar simulation by string shunt-wound capacitance; And for the failure mode of turn-to-turn short circuit, only need by the end of a thread the tap link at position to be simulated.
In addition, based on the above-mentioned design of the testing transformer to simulation three-phase transformer in the utility model, can utilize frequency sweep impedance method test macro and the corresponding software platform set up to test, stability and the accuracy of research frequency sweep impedance method; And according to frequency sweep characteristic curve dissimilar and that fault obtains in various degree and the short-circuit reactance value that pushes away, set up the criterion of diagnosis winding deformation type and degree.Concrete experimental procedure is as follows
1, three phase windings of transformer are applied respectively to swept-frequency signal, utilize the testing transformer of simulation three-phase transformer to measure and record the background frequency sweep impedance curve of each winding, the line correlation research of going forward side by side of the frequency sweep impedance curve feature of understanding each phase high-low pressure winding, it should be noted that, carry out single winding requirement of experiment remaining winding outlet terminal all unsettled;
2, the related conclusions obtaining according to emulation experiment, manufactures dissimilar and degree defect at the diverse location of the each phase winding of transformer, the feature of research corresponding windings frequency sweep impedance curve, and analyze with background curves separately;
3, accident defect is placed in to the diverse location of the each phase winding of transformer, observes the situation of change of its contiguous winding frequency sweep impedance curve, the electrostatic coupling effect between research winding;
4, in the time testing at every turn, various accident defects are designed successively in transformer A, B, C three-phase high-voltage side, applies swept-frequency signal according to relevant rules in three-phase low-voltage side respectively, records frequency sweep spectrogram; The high/low pressure side Δ/Y of the line transformer winding of going forward side by side changing-over, probes into the Changing Pattern of frequency sweep impedance curve under different transformer joint group;
5, apply swept-frequency signal in Transformer Winding high-pressure side, repeat above step.
In addition, what the utility model provided can be preset the testing transformer of defect formula simulation three-phase transformer, it has also done corresponding improvement at local structure, make it have better performance, specifically refer to Fig. 5, the structural representation of the testing transformer embodiment bis-of the simulation three-phase transformer providing for the utility model.
Can preset defect formula simulate in the testing transformer of three-phase transformer shown in the present embodiment two, is also provided with fuel outlet valve 11, operation window 12, ground terminal 13, pressure relief valve 14 at fuel tank 1 outer wall;
Concrete, fuel outlet valve 11 is arranged on the bottom, side of fuel tank 1 outer wall, for the assay that regularly draws oil sample.Operation window 12 is positioned at the testing transformer front middle part of simulation three-phase transformer, opens this operation window 12, can revise part experimental wiring, avoids the unnecessary redundant operations such as cover that hang.Ground terminal 13 is positioned at the positive basifacial of testing transformer of simulation three-phase transformer, and it is connected with ground wire, to guarantee the shell reliable ground of the testing transformer of simulating three-phase transformer.Pressure relief valve 14 is arranged on the top of testing transformer of simulation three-phase transformer, and in the time that the internal pressure of the testing transformer of simulation three-phase transformer exceedes threshold value, relief pressure automatically, to guarantee the safety of the testing transformer of simulating three-phase transformer.
Implement the utility model, there is following beneficial effect:
The testing transformer of the simulation three-phase transformer that the utility model provides, its high pressure winding and low pressure winding are all drawn outlet, can carry out the flexible changing-over of Δ/Y type, are convenient to be determined by experiment the situation of change of winding frequency response curve under different joint group and fault condition;
The high pressure winding of the testing transformer of the simulation three-phase transformer that the utility model provides can evenly be extracted a large amount of taps vertically out, can carry out fault simulation;
In addition, the low pressure winding of the testing transformer of the simulation three-phase transformer that the utility model provides also can leading-out terminal, facilitates dependent failure simulation.
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method, can carry out the hardware that instruction is relevant by computer program to complete, described program can be stored in a computer read/write memory medium, this program, in the time carrying out, can comprise as the flow process of the embodiment of above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (6)
1. a testing transformer of simulating three-phase transformer, is characterized in that, comprising: fuel tank, high pressure winding, low pressure winding;
Described high pressure winding has bushing, and described low pressure winding has low-tension bushing;
The first and last end of described high pressure winding is drawn outlet to described top of oil-tank via described bushing, and the first and last end of described low pressure winding is drawn outlet to described top of oil-tank via described low-tension bushing;
Described high pressure winding and low pressure winding also have the tap for the form of distortion by connection in series-parallel capacitor and inductor simulation range transformer high pressure winding and low pressure winding.
2. the testing transformer of simulation three-phase transformer as claimed in claim 1, is characterized in that, the tap of the low pressure winding of the testing transformer of described simulation three-phase transformer is connected to the terminal block beyond low pressure winding.
3. the testing transformer of simulation three-phase transformer as claimed in claim 2, is characterized in that, described fuel tank outer wall is also provided with the fuel outlet valve for the assay that regularly draws oil sample; Concrete described fuel outlet valve is arranged on the bottom, side of described fuel tank outer wall.
4. the testing transformer of simulation three-phase transformer as claimed in claim 3, is characterized in that, described fuel tank outer wall is also provided with the operation window for revising experimental wiring; Concrete described operation window is positioned at the middle part, testing transformer front of described simulation three-phase transformer.
5. the testing transformer of simulation three-phase transformer as claimed in claim 4, is characterized in that, described fuel tank outer wall is also provided with ground terminal; Described ground terminal is positioned at the positive basifacial of testing transformer of described simulation three-phase transformer, and it is connected with ground wire.
6. the testing transformer of simulation three-phase transformer as claimed in claim 5, is characterized in that, described fuel tank outer wall is also provided with the pressure relief valve of automatic relief pressure in the time that the internal pressure of the testing transformer of described simulation three-phase transformer exceedes threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320570371.4U CN203688675U (en) | 2013-09-13 | 2013-09-13 | Test transformer of simulation three-phase transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320570371.4U CN203688675U (en) | 2013-09-13 | 2013-09-13 | Test transformer of simulation three-phase transformer |
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| Publication Number | Publication Date |
|---|---|
| CN203688675U true CN203688675U (en) | 2014-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320570371.4U Expired - Lifetime CN203688675U (en) | 2013-09-13 | 2013-09-13 | Test transformer of simulation three-phase transformer |
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| Country | Link |
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| CN (1) | CN203688675U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109188123A (en) * | 2018-08-16 | 2019-01-11 | 广西电网有限责任公司电力科学研究院 | A kind of transformer turn-to-turn, phase fault simulator and its application method |
-
2013
- 2013-09-13 CN CN201320570371.4U patent/CN203688675U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109188123A (en) * | 2018-08-16 | 2019-01-11 | 广西电网有限责任公司电力科学研究院 | A kind of transformer turn-to-turn, phase fault simulator and its application method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140702 |