CN203324409U - Transformer DC bias magnet fault simulation structure - Google Patents
Transformer DC bias magnet fault simulation structure Download PDFInfo
- Publication number
- CN203324409U CN203324409U CN2013204133075U CN201320413307U CN203324409U CN 203324409 U CN203324409 U CN 203324409U CN 2013204133075 U CN2013204133075 U CN 2013204133075U CN 201320413307 U CN201320413307 U CN 201320413307U CN 203324409 U CN203324409 U CN 203324409U
- Authority
- CN
- China
- Prior art keywords
- magnetic biasing
- transformer
- wire
- coil
- biasing coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Housings And Mounting Of Transformers (AREA)
Abstract
The utility model discloses a transformer DC bias magnet fault simulation structure comprising a three-column transformer iron core, a smooth adjustable DC current source, a first DC bias magnet coil and a second DC bias magnet coil. The first DC bias magnet coil is wound on the left-lower iron yoke of the three-column transformer iron core, and the second DC bias magnet coil is wound on the right-lower iron yoke of the three-column transformer iron core. One end of the first DC bias magnet coil is connected in series with one end of the second DC bias magnet coil. The other end of the first DC bias magnet coil is connected with a first leading-out wire, and the other end of the second DC bias magnet coil is connected with a second leading-out wire. The first leading-out wire and the second leading-out wire are connected to the smooth adjustable DC current source. The winding direction of the first DC bias magnet coil on the left-lower iron yoke is the same with that of the second DC bias magnet coil on the right-lower iron yoke. The fault simulation structure is capable of accurately simulating DC bias magnet faults under various working conditions, and is benefit for completing the study on the transformer DC bias magnet faults.
Description
Technical field
The utility model relates to transformer fault analogue technique field, refers to particularly a kind of DC magnetic biasing fault simulation structure of transformer.
Background technology
Along with China's alternating current-direct current mixing Transmission Mode forms gradually, the problem of ac and dc systems phase mutual interference also occurs thereupon.When DC line adopts the one pole the earth to go the same way operation, the DC current that the earthing pole by straight-flow system flows into the earth will exert an influence to the power equipment in AC electric power systems.
Harmonic current in transformer magnetizing current generally is not more than 2% of transformer rated current, when direct current enters transformer, with the Transformer Winding electric current, mixes, and the close working point of transformer magnetic is offset, and makes transformer DC magnetic bias.Serious transformer DC magnetic bias will make transformer be operated under the height state of saturation, and saturable core becomes higher reluctance path, and leakage flux increases, and the excitation current waveform distortion, produce more eddy current loss; Because kelvin effect has increased copper loss, frequency is higher, and copper loss is larger.The iron loss of transformer also increases simultaneously, makes transformer overheated.Increase on the one hand the thermal losses of system, heating makes equipment produce temperature rise on the other hand, thereby worsens apparatus insulated condition, shortens the life-span of equipment.The exciting current increase causes transformer to produce a large amount of leakage fields, and the electric power that leakage field and the Transformer Winding function of current produce makes basket vibration produce noise, easily makes winding deformation aging simultaneously.The exciting current increased in addition increases the weight of the magneto-striction phenomenon of transformer core, produces larger transformer noise.
Dependent diagnostic research work for the transformer DC magnetic bias fault at present needs transformer DC magnetic bias electric quantity signal, vibration and noise signals and the temperature signal etc. under a large amount of different operating modes.But operation of power networks equipment DC magnetic biasing sample is few, fault is difficult to hold opportunity, and on-the-spot test is difficult to obtain sufficient DC magnetic biasing fault-signal feature, has restricted the research of DC magnetic biasing fault.At present also there is no the equipment that can be simulated the DC magnetic biasing fault, hindered the research of researchist to the transformer DC magnetic bias fault.
The utility model content
The purpose of this utility model is exactly the DC magnetic biasing fault simulation structure that a kind of transformer will be provided, and utilizes this transformer can carry out respectively the monitoring of the DC magnetic biasing fault under various working and research, the fault diagnosis research of DC magnetic biasing fault under various working and the countermeasure research of DC magnetic biasing fault of pick-up unit.
For realizing this purpose, the DC magnetic biasing fault simulation structure of the transformer that the utility model is designed, it is characterized in that: it comprises the three pillar type transformer core, level and smooth adjustable DC current source, the first DC magnetic biasing coil and the second DC magnetic biasing coil, wherein, coiling the first DC magnetic biasing coil on the left lower yoke of described three pillar type transformer core, coiling the second DC magnetic biasing coil on the right lower yoke of described three pillar type transformer core, one end of one end of described the first DC magnetic biasing coil and the second DC magnetic biasing coil is connected in series, the other end of described the first DC magnetic biasing coil is connected with first and draws wire, the other end of the second DC magnetic biasing coil is connected with second and draws wire, described first draws wire and second draws wire and all accesses level and smooth adjustable DC current source, the coiling direction of described the first DC magnetic biasing coil on left lower yoke is identical with the coiling direction of the second DC magnetic biasing coil on right lower yoke.
In technique scheme, it also comprises the transformer oil tank wall, transformer oil tank cover, a plurality of binding straps, be arranged on the first DC magnetic biasing insulating sleeve and the second DC magnetic biasing insulating sleeve on transformer oil tank cover, be arranged on the insulating support of transformer oil tank wall inboard, described first draws wire is fixed on a side of insulating support by binding strap, described first draws the power connection end of wire through the level and smooth adjustable DC current source of access after the first DC magnetic biasing insulating sleeve, described second draws wire is fixed on the opposite side of insulating support by binding strap, described second draws the power connection end of wire through the level and smooth adjustable DC current source of access after the second DC magnetic biasing insulating sleeve.
The equal turn numbers of the number of turn of described the first DC magnetic biasing coil and the second DC magnetic biasing coil.
Described the first DC magnetic biasing coil, the second DC magnetic biasing coil, first are drawn wire and second and are drawn on wire and all be enclosed with insulating paper cylinder.
The described smoothly power supply output area of adjustable DC current source is 0～5A.
The wire diameter scope of described the first DC magnetic biasing coil and the second DC magnetic biasing coil is 2.5 ~ 3.9mm.
The number of turn of the number of turn of described the first DC magnetic biasing coil and the second DC magnetic biasing coil is 10 circles.
Describedly be arranged on first on insulating support and draw wire and second and draw the wire layout that is parallel to each other.
The utility model by being wound around the DC magnetic biasing coil on the iron yoke of three pillar type transformer core, and by level and smooth adjustable DC current source, coil is powered, make the utility model can accurately simulate the DC magnetic biasing fault under various working, be conducive to research and proving test to the transformer DC magnetic bias fault.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
The structural representation that Fig. 2 is transformer oil tank wall inboard in the utility model;
The sectional view that Fig. 3 is the first DC magnetic biasing coil in the utility model.
Wherein, 1-three pillar type transformer core, 1.1-left lower yoke, 1.2-right lower yoke, 2-level and smooth adjustable DC current source, the 3-the first DC magnetic biasing coil, 3.1-the first drawn wire, the 4-the second DC magnetic biasing coil, 4.1-the second is drawn wire, 5-transformer oil tank wall, 6-transformer oil tank cover, the 7-the first DC magnetic biasing insulating sleeve, the 8-the second DC magnetic biasing insulating sleeve, 9-insulating support, 10-insulating paper cylinder, 11-binding strap.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
The DC magnetic biasing fault simulation structure of the transformer of the utility model design, as shown in Fig. 1 ~ 3, it comprises three pillar type transformer core 1, level and smooth adjustable DC current source 2, the first DC magnetic biasing coil 3 and the second DC magnetic biasing coil 4, wherein, coiling the first DC magnetic biasing coil 3 on the left lower yoke 1.1 of three pillar type transformer core 1, coiling the second DC magnetic biasing coil 4 on the right lower yoke 1.2 of three pillar type transformer core 1, one end of one end of the first DC magnetic biasing coil 3 and the second DC magnetic biasing coil 4 is connected in series, the other end of the first DC magnetic biasing coil 3 is connected with first and draws wire 3.1, the other end of the second DC magnetic biasing coil 4 is connected with second and draws wire 4.1, first draws wire 3.1 and second draws wire 4.1 and all accesses level and smooth adjustable DC current source 2, the coiling direction of the first DC magnetic biasing coil 3 on left lower yoke 1.1 is identical with the coiling direction of the second DC magnetic biasing coil 4 on right lower yoke 1.2.
In technique scheme, the parts such as device body, sleeve pipe, load ratio bridging switch, heat radiator of having equipped transformer of the present utility model can design and manufacture according to national standards such as GB1094.1, GB1094.2, GB1094.3, GB1094.5.The relevant pump motor set of transformer is: rated voltage: (10000 ± 2 * 2.5%)/400V, rated capacity: 200kVA, rated current: 11.55/288.7A, connection set: Dyn11, short-circuit impedance: 4%, the type of cooling: ONAN is the interior oil natural convection type of cooling.
In technique scheme, it also comprises transformer oil tank wall 5, transformer oil tank cover 6, a plurality of binding straps 11, be arranged on the first DC magnetic biasing insulating sleeve 7 and the second DC magnetic biasing insulating sleeve 8 on transformer oil tank cover 6, be arranged on the insulating support 9 of transformer oil tank wall 5 inboards, first draws wire 3.1 is fixed on a side of insulating support 9 by binding strap 11, first draws the power connection end of wire 3.1 through the level and smooth adjustable DC current source 2 of the rear access of the first DC magnetic biasing insulating sleeve 7, second draws wire 4.1 is fixed on the opposite side of insulating support 9 by binding strap 11, second draws the power connection end of wire 4.1 through the level and smooth adjustable DC current source 2 of the rear access of the second DC magnetic biasing insulating sleeve 8.
In technique scheme, the equal turn numbers of the number of turn of the first DC magnetic biasing coil 3 and the second DC magnetic biasing coil 4, be 10 circles.Due to left and right lower yoke length symmetry, so the design equal turn numbers makes three post direct current fluxes comparatively even simultaneously.10kV testing transformer parameter is as follows: low pressure winding 36 circles, and the design no-load current is 0.17%, number percent is nominal value, refers to 0.17% of rated current.Belong to the canonical representation method, low-voltage rated electric current 288.7A, connected mode Dyn11(D means that a winding is the triangular form wiring, and Y means that it is star-connection that secondary is surveyed winding, and n means to draw the neutral line, 11 mean winding of phase delay 330 degree of secondary survey winding, with the method for expressing of clock, suppose once to survey 12 moment centered by winding, two survey windings just 11 positions so, angle is 30 degree), estimate that unloaded magnetomotive force is 288.7A*0.17%*36*3 circle ≈ 54 ampere-turns.The left and right lower yoke can be about 80mm for the length of coiling, and the number of turn that designs the first DC magnetic biasing coil 3 and the second DC magnetic biasing coil 4 is 10 circles.
In technique scheme, the first DC magnetic biasing coil 3, the second DC magnetic biasing coil 4, first are drawn wire 3.1 and second and are drawn on wire 4.1 and all be enclosed with insulating paper cylinder 10.This insulating paper cylinder 10 is for carrying out electrical protection to the DC magnetic biasing coil winding.Prevent that the utility model from exerting an influence to the function of original transformer.
In technique scheme, the power supply output area of level and smooth adjustable DC current source 2 is 0～5A.The utility model can, by regulating the size of DC current, be controlled the order of severity of DC magnetic biasing.Simultaneously, can change the transformer operating condition, simulate the DC magnetic biasing under different situations.The technician can be monitored transformer by electrical quantity sensor, vibration transducer, noise transducer and temperature sensor, thereby obtains multifarious DC magnetic biasing fault-signal.
In technique scheme, the wire diameter scope of the first DC magnetic biasing coil 3 and the second DC magnetic biasing coil 4 is 2.5 ~ 3.9mm.The specification of described wire is BV-90 1 * 2.5mm
2, single core flexible conductor unjacked cable that internal wiring is 90 ℃ with conductor temperature, be mainly the problem of temperature rise while considering the DC magnetic biasing fault simulation, chooses the highest accurate wire of 90 scale, so simultaneously because want coiling to select without sheath type.
In technique scheme, describedly be arranged on first on insulating support 9 and draw wire 3.1 and second and draw wire 4.1 layout that is parallel to each other.
When the utility model is used, level and smooth adjustable DC current source 2 and first is drawn to wire 3.1 and second draws wire 4.1 and is connected, electrical quantity sensor, vibration transducer, noise transducer and the temperature sensor matched with the utility model is installed simultaneously, can carry out relevant DC magnetic biasing fault simulating test, in process of the test, by regulating the output current size of level and smooth adjustable DC current source 2, carry out the order of severity of the DC magnetic bias phenomena that produces on control transformer.Simultaneously, can also, by changing the operating condition of transformer, simulate the DC magnetic biasing in different transformer operating mode situations.The technician can be monitored transformer by electrical quantity sensor, vibration transducer, noise transducer and temperature sensor, thereby obtains multifarious DC magnetic biasing fault-signal.In addition, forbid DC magnetic biasing coil outlet short circuit during the utility model analogue transformer DC magnetic biasing fault.For example, while carrying out the DC magnetic biasing fault simulating test under idle condition, at low-pressure side winding line end, connect pressure regulator, supply with the trial voltage of rated frequency, high pressure winding open circuit, earth potential and tank envelope reliable ground.On the basis of no-load test, regulate the DC current size, make overexcitation unshakable in one's determination, the DC magnetic biasing fault simulating test under the simulation no-load condition.
The utility model is the fault diagnosis research of DC magnetic biasing fault under various working, and the countermeasure research of DC magnetic biasing fault improves important referential data.
Claims (8)
1. the DC magnetic biasing fault simulation structure of a transformer, it is characterized in that: it comprises three pillar type transformer core (1), level and smooth adjustable DC current source (2), the first DC magnetic biasing coil (3) and the second DC magnetic biasing coil (4), wherein, upper coiling the first DC magnetic biasing coil (3) of the left lower yoke (1.1) of described three pillar type transformer core (1), upper coiling the second DC magnetic biasing coil (4) of the right lower yoke (1.2) of described three pillar type transformer core (1), one end of one end of described the first DC magnetic biasing coil (3) and the second DC magnetic biasing coil (4) is connected in series, the other end of described the first DC magnetic biasing coil (3) is connected with first and draws wire (3.1), the other end of the second DC magnetic biasing coil (4) is connected with second and draws wire (4.1), described first draws wire (3.1) and second draws wire (4.1) and all accesses level and smooth adjustable DC current source (2), the coiling direction of described the first DC magnetic biasing coil (3) on left lower yoke (1.1) is identical with the coiling direction of the second DC magnetic biasing coil (4) on right lower yoke (1.2).
2. the DC magnetic biasing fault simulation structure of transformer according to claim 1, it is characterized in that: it also comprises transformer oil tank wall (5), transformer oil tank cover (6), a plurality of binding straps (11), be arranged on the first DC magnetic biasing insulating sleeve (7) and the second DC magnetic biasing insulating sleeve (8) on transformer oil tank cover (6), be arranged on the inboard insulating support (9) of transformer oil tank wall (5), described first draws wire (3.1) is fixed on a side of insulating support (9) by binding strap (11), described first draws the power connection end of wire (3.1) through the level and smooth adjustable DC current source (2) of access after the first DC magnetic biasing insulating sleeve (7), described second draws wire (4.1) is fixed on the opposite side of insulating support (9) by binding strap (11), described second draws the power connection end of wire (4.1) through the level and smooth adjustable DC current source (2) of access after the second DC magnetic biasing insulating sleeve (8).
3. the DC magnetic biasing fault simulation structure of transformer according to claim 1, is characterized in that: the equal turn numbers of the number of turn of described the first DC magnetic biasing coil (3) and the second DC magnetic biasing coil (4).
4. according to the DC magnetic biasing fault simulation structure of claim 1 or 2 or 3 described transformers, it is characterized in that: described the first DC magnetic biasing coil (3), the second DC magnetic biasing coil (4), first are drawn wire (3.1) and second and are drawn on wire (4.1) and all be enclosed with insulating paper cylinder (10).
5. the DC magnetic biasing fault simulation structure of transformer according to claim 1 and 2 is characterized in that: the power supply output area of described level and smooth adjustable DC current source (2) is 0～5A.
6. according to the DC magnetic biasing fault simulation structure of claim 1 or 2 or 3 described transformers, it is characterized in that: the wire diameter scope of described the first DC magnetic biasing coil (3) and the second DC magnetic biasing coil (4) is 2.5 ~ 3.9mm.
7. the DC magnetic biasing fault simulation structure of transformer according to claim 3, it is characterized in that: the number of turn of the number of turn of described the first DC magnetic biasing coil (3) and the second DC magnetic biasing coil (4) is 10 circles.
8. the DC magnetic biasing fault simulation structure of transformer according to claim 2 is characterized in that: describedly be arranged on first on insulating support (9) and draw wire (3.1) and second and draw wire (4.1) layout that is parallel to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204133075U CN203324409U (en) | 2013-07-11 | 2013-07-11 | Transformer DC bias magnet fault simulation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204133075U CN203324409U (en) | 2013-07-11 | 2013-07-11 | Transformer DC bias magnet fault simulation structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203324409U true CN203324409U (en) | 2013-12-04 |
Family
ID=49663747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013204133075U Expired - Lifetime CN203324409U (en) | 2013-07-11 | 2013-07-11 | Transformer DC bias magnet fault simulation structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203324409U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323722A (en) * | 2013-07-11 | 2013-09-25 | 国家电网公司 | Direct current magnetic bias fault simulation structure for transformer |
| CN104316810A (en) * | 2014-11-21 | 2015-01-28 | 武汉大学 | Direct-current magnetic bias multistage progressive comprehensive treatment assessment method |
-
2013
- 2013-07-11 CN CN2013204133075U patent/CN203324409U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323722A (en) * | 2013-07-11 | 2013-09-25 | 国家电网公司 | Direct current magnetic bias fault simulation structure for transformer |
| CN103323722B (en) * | 2013-07-11 | 2015-07-01 | 国家电网公司 | Direct current magnetic bias fault simulation structure for transformer |
| CN104316810A (en) * | 2014-11-21 | 2015-01-28 | 武汉大学 | Direct-current magnetic bias multistage progressive comprehensive treatment assessment method |
| CN104316810B (en) * | 2014-11-21 | 2017-03-15 | 武汉大学 | A kind of D.C. magnetic biasing multistage laddering comprehensive control appraisal procedure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102624325B (en) | Motor drive system, detection method of ground faults, and common mode choker system | |
| CN106291123B (en) | A kind of method directly measuring magnetic cell winding loss | |
| CN105044479A (en) | Apparatus for large-scale oil-immersed transformer no-load and on-load comprehensive tests and method | |
| WO2023179153A1 (en) | Generator iron core loss test system and method for reducing test impulse current | |
| CN103323722B (en) | Direct current magnetic bias fault simulation structure for transformer | |
| CN203324409U (en) | Transformer DC bias magnet fault simulation structure | |
| CN203551765U (en) | Zero load on-site electric energy meter testing device | |
| CN107102229B (en) | Method for realizing transformer model for no-load switching transient calculation | |
| CN104237835A (en) | Wiring detection device for straight-through current transformer | |
| CN201918254U (en) | Current transformer device for measuring characteristic parameter of grounding device | |
| CN208225684U (en) | A kind of outgoing line device of power transformer balance winding | |
| CN203536206U (en) | Adjustable loaded passive zero-flux single-turn core-through current transformer | |
| CN103487705A (en) | Quality control method for excitation characteristics of C-type iron core voltage transformer | |
| CN106841808B (en) | The auxiliary winding measurement method of intermediate-frequency transformer winding AC resistance | |
| CN204515031U (en) | Large Oil immersion transformer is empty, load test complex | |
| CN105319478A (en) | Un-disassembly polarity and transformation ratio testing method for transformer bushing | |
| CN210155235U (en) | Testing arrangement of transformer core no-load performance | |
| CN210626597U (en) | Detection apparatus for utilize capacitive sleeve pipe end screen to carry out homonymy high-tension apparatus partial discharge | |
| CN103295753B (en) | Large-span high-precision composite-transformacurrenttio currenttio transformer and manufacture method | |
| CN202930199U (en) | Current transformer | |
| CN105866520A (en) | High and low voltage dual-channel current detection system | |
| CN210073599U (en) | Current transformer | |
| Li et al. | Calculation and Analysis of Short-circuit Performance of a Split-Winding Transformer with Stabilizing Windings | |
| CN206040415U (en) | Many windings voltage transformer | |
| CN101718823B (en) | Multi-winding uneven winding equivalent ampere turn method for testing anti-electromagnetic interference force of high-current transducer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131204 |