CN206003607U - A kind of transformator harmonic elimination apparatus - Google Patents
A kind of transformator harmonic elimination apparatus Download PDFInfo
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- CN206003607U CN206003607U CN201621003005.0U CN201621003005U CN206003607U CN 206003607 U CN206003607 U CN 206003607U CN 201621003005 U CN201621003005 U CN 201621003005U CN 206003607 U CN206003607 U CN 206003607U
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- elimination apparatus
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Abstract
A kind of transformator harmonic elimination apparatus, including three-phase separate body dry-type transformer it is characterised in that：All it is wound with solenoid, described solenoid is wound in the middle part of the iron yoke on every phase winding on the winding of the every phase of described three-phase separate body dry-type transformer.This utility model provides a kind of transformator harmonic elimination apparatus, does not change primary winding wiring, does not change its basic structure, is particularly suited for the elimination of epoxy resins insulation dry-type distribution transformer 3 subharmonic.
Description
Technical field
This utility model is related to transformator harmonic elimination technical field, particularly a kind of elimination Yyn0 mode of connection power transformer
The device of output voltage higher hamonic wave.
Background technology
The same voltage of waveform of alternating current power supply, frequency are the same, are all the important indicators weighing the quality of power supply.Preferably power supply ripple
Shape is the sine wave of 50Hz, also referred to as fundamental wave.Other frequencies are fundamental wave 2,3,4 ... the sine wave of n integral multiple, can be referred to as 2 successively,
3rd, 4 ... nth harmonic, they are referred to as higher hamonic wave.Power supply wave shape is made to be distorted after fundamental wave superposition higher hamonic wave, impact electricity
Energy quality is especially prominent with 3 subharmonic in odd harmonic.Standard GB/T/T 14549-《Quality of power supply public power
Net harmonic wave》Middle regulation, in 220/380V electrical network, each harmonic voltage containing ratio all must not exceed 4.0%, the total harmonic distortion of voltage
Rate should be less than 5.0%.
In order to effectively eliminate 3 subharmonic, make full use of the capacity of equipment of transformator, most countries are recommended distribution power transformation
Source winding presses triangle（D）Connect, load side presses star（Y）Connect, that is, modal Dyn11 connects group.China
It has been recommended that adopting this wiring, in the middle of practical application, domestic more than 1MVA distribution change is also mostly up-to-date relevant design specification
This wiring.Another kind of wiring standard all adopts Y to connect for both sides, that is, the modal Yyn0 mode of connection, in European state
Family（As France）Very popular, also it was once the leading approved product during China's distribution becomes, market maintenance is quite a few.In recent years
Come, the epoxy resin-insulated dry type transformer of non-oil ultra high vacuum system has become the mainstream configuration of indoor distribution change.
Should say that two kinds of connection groups respectively have pluses and minuses.The feature of Yyn0 wiring is exactly that zero sequence impedance is big, earth fault electricity
Stream is little, in addition can save some metals and insulant in manufacturing cost.But distribution becomes former limit Y to be connected and no center line, and three times humorous
Ripple electric current can not circulate, and when excitation current waveform is sine wave, in iron core, magnetic flux is flat-topped wave, contained by secondary induced potential waveform
3 order harmonic components are just big.For this reason, some Large Oil transformators have completed in manufacturing and designing installs arranging of the 3rd balance winding additional
Apply, form Yyn0d wiring.This utility model is directed in manufacturing and designing the product that do not take measures, by the Yyn0+ of live added improvement
D mode of connection and real case.
Two, Guinea Kai Leta power station station-service is changed into 3 × DCB10-534/10.5-0.4 type three-phase separate soma formula and becomes,
Single-phase/three-phase rated capacity 534/1600kVA, secondary voltage 0.23/0.4kV.Connect group should French technical advice emphasize, press
Yyn0 wiring design manufactures.In May, 2015 put into operation before every electrical test data all qualified, but unloaded secondary phase/line after power transmission
Asymmetrical voltage, is 0.25/0.4kV.Preliminary lookup does not find that other is abnormal, occurs in that and make an uproar after tentative tape splicing station-service load
Sound, heating, the abnormal phenomena such as imbalance of three-phase voltage, and scaling loss a collection of PLC power module and station-service breaker control module.
With oscillograph, secondary voltage is carried out with harmonic measure analysis afterwards, finds that line voltage is normal, but phase voltage waveform distortion especially severe,
3 subharmonic voltages are up to 89V, have reached the 40% of fundamental voltage 220V, are 10 times of GB License Value！If taking no action to disappear
Except harmonic wave, equipment can not put into operation at all.
House transformer is to provide power supply for the various power loads such as auxiliary shared device power, control, illumination in station
Visual plant, should complete debugging first and put into operation before new unit operation.If remanufacturing, being replaced with two Dyn11 wiring and becoming
Depressor, produces, the sea-freight cycle, the duration can not meet engineering power generation and final acceptance of construction requirement, high cost more than 5 months.
If by former limit（10.5kV side）Winding transform D as and connects, and two transformators need to customize 12 again from domestic（Every phase 2）High pressure
To scene, coil and about 3 tons of auxiliary material weight, the duration also needs more than 2 months, and cost is also high for coil air transport.And change high-voltage line
Circle, by transformator, all decomposes including its iron core, destroys appliance integrality, and scene fills skill of returning to work and can not reach genuine mark
Standard, quality and safety all cannot ensure.
Content of the invention
Technical problem to be solved in the utility model is to provide a kind of transformator harmonic elimination apparatus, does not change primary winding and connects
Line, does not change its basic structure, is particularly suited for the elimination of epoxy resins insulation dry-type distribution transformer 3 subharmonic.
For solving above-mentioned technical problem, this utility model be employed technical scheme comprise that：A kind of transformator harmonic elimination apparatus, bag
Include three-phase separate body dry-type transformer it is characterised in that：All it is wound with electricity on the winding of the every phase of described three-phase separate body dry-type transformer
Magnetic coil, described solenoid is wound in the middle part of the iron yoke on every phase winding.
Preferably, the equal turn numbers of the solenoid described every phase winding being wound around.
Preferably, it is provided with the D279 epoxy prepreg of two-layer 0.16mm, described electromagnetism between described solenoid and iron yoke
The outside of coil is coated with the D279 epoxy prepreg of two-layer 0.16mm.
Preferably, described solenoid carries out colligation using alkali-free glass fibre band.
Preferably, described solenoid is the solenoid of equidirectional coiling 22 circle.
Preferably, described solenoid adopts the line footpath of 2.65 × 7.1mm.
Preferably, the bottom of described iron yoke is provided with mylar.
The beneficial effects of the utility model are：Full symmetric, 3 grades of zero loads under output phase/line voltage zero load, load condition
Voltage is standard value 0.23/0.4kV, and waveform has recovered the sine wave of standard, and 3 times and other each harmonic voltage are respectively less than 2V,
Containing ratio all less than 1%, better than the 4% of GB.
Brief description
The utility model is described in further detail with reference to the accompanying drawings and examples：
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the cross-sectional view that solenoid of the present utility model is wound around；
In figure：Solenoid 1, iron yoke 2, epoxy prepreg 3, mylar 4.
Specific embodiment
As shown in figure 1, a kind of transformator harmonic elimination apparatus, including three-phase separate body dry-type transformer it is characterised in that：Described three
Solenoid 1 is all wound with the winding of the every phase of phase split dry-type transformer, described solenoid 1 is wound on every phase winding
The middle part of iron yoke 2.
Preferably, the equal turn numbers of the solenoid described every phase winding being wound around.In figure x1-a1, y1-b1, z1-c1 institute
Show the balance winding that respectively A, B, C three-phase newly increases.
Preferably, as shown in Fig. 2 being provided with the D279 epoxy prepreg of two-layer 0.16mm between described solenoid and iron yoke
3, the outside of described solenoid is coated with the D279 epoxy prepreg 3 of two-layer 0.16mm.
Preferably, described solenoid carries out colligation using alkali-free glass fibre band.
Preferably, described solenoid is the solenoid of equidirectional coiling 22 circle.
Preferably, described solenoid adopts the line footpath of 2.65 × 7.1mm.
Preferably, the bottom of described iron yoke 2 is provided with mylar 4, for reinforced insulation.
Mainly based on field condition, Bu Fan factory transforms, does not destroy approved product basic structure, work as Yyn0 this utility model
When wiring 3 subharmonic is above standard, using magnetic potential balance principle, coiling auxiliary balance winding at the scene, transformator is made to become
The Yyn0+d mode of connection, effectively eliminates 3 subharmonic voltages.Operation test more than half a year shows, device not only harmonic elimination effect is significant,
Safe and reliable to operation, and structure is simple, easy construction, with low cost.
3 subharmonic present in transformer output voltage, is substantially that the nonlinear magnetization of transformer core saturation region is special
Property causes.The exciting current of sine wave, magnetize in the core be flat-topped wave magnetic flux, wherein contain larger 3 time humorous
Wave component.In symmetry alternating current circuit, the phase contrast of three-phase fundamental wave is 120 °, and 3 subharmonic phase contrasts are 3 × 120 °=360 °.Cause
This, in three-phase windings, 3 subharmonic vectors are not equal to 0.Yyn0 wiring transformer, former limit Y-connection and the no neutral conductor, three times
Harmonic current can not circulate, and higher harmonic components contained by secondary induced potential waveform are big；Under the conditions of former limit is connected into triangle, can be
Former limit forms circulation, reaches magnetic potential balance, can effectively suppress 3 subharmonic currents.So in theory, as long as what one d of coiling connect
Little balance winding, replaces the D of Dyn11 wiring to connect high pressure winding, dredges circulation 3 subharmonic currents just.This d connects winding and carries work(
Rate is mainly idle property, and voltage is not less than secondary rated value（This example 89V）, and do not need external tape splicing load, so, around
The line footpath of group and the number of turn, class of insulation requirement etc. is not all high, and live processing and fabricating condition possesses completely.By GB
GB50052-《Code for design of electric power supply systems》, Yyn0 wiring distribution low pressure side neutral current must not exceed the specified electricity of winding
The 25% of stream；Excitation total current is generally less than 1%.Assume that zero-sequence current and 3 subharmonic exciting currents all to be put down by balance winding
Weighing apparatus, 30% capacity considers to be sufficient to.
On the basis of former transformator basic structure is not made any change, using the iron yoke space in Transformer Winding
Position is wound around solenoid, and rule of thumb data calculates the line footpath of electromagnetic wire and is wound around the number of turn, carries out d to increased every phase coil
Connect, its voltage is not less than specified phase voltage.Every phase coil winding direction should be consistent with the number of turn, carries out insulation processing and protect during winding
The fixing technology for binding of card requires.D connects winding as higher hamonic wave loop in exciting current, and not external output voltage, to its capacity
Also can have not a particular requirement.
Practice of construction：The upper yoke central space position exposed in every phase winding, the electromagnetic wire of equidirectional coiling 22 circle, line
Footpath 2.65 × 7.1mm, voltage 400V.The D279 epoxy prepreg of the first 0.16mm that double-bags in upper yoke before coiling, winding is no
Alkali containing glass fibre band colligation, tension fastens.Double-bag after coiling outside winding D279 again.Iron yoke bottom is strengthened absolutely with mylar
Edge.Be equivalent to each mutually one little additional winding of increase, d carried out to this three-phase windings and connects, so that the connection group of transformator is become
The Yyn0+d mode of connection, three terminals that d connects are to outside open circuit it is ensured that welding and insulating treatment process require.
The above embodiments are only optimal technical scheme of the present utility model, and are not construed as limit of the present utility model
System, the technical scheme that protection domain of the present utility model should be recorded with claim, the technical scheme recorded including claim
The equivalents of middle technical characteristic are protection domain.I.e. equivalent within this range is improved, also in this utility model
Protection domain within.
Claims (7)
1. a kind of transformator harmonic elimination apparatus, including three-phase separate body dry-type transformer it is characterised in that：Described three-phase separate soma formula becomes
Solenoid is all wound with the winding of the every phase of depressor, described solenoid is wound in the middle part of the iron yoke on every phase winding.
2. according to claim 1 a kind of transformator harmonic elimination apparatus it is characterised in that：The electromagnetism being wound around on described every phase winding
The equal turn numbers of coil.
3. according to claim 1 a kind of transformator harmonic elimination apparatus it is characterised in that：Set between described solenoid and iron yoke
There is the D279 epoxy prepreg of two-layer 0.16mm, the outside of described solenoid is coated with the D279 epoxy preimpregnation of two-layer 0.16mm
Material.
4. according to claim 1 a kind of transformator harmonic elimination apparatus it is characterised in that：Described solenoid adopts alkali-free glass
Fiber band carries out colligation.
5. according to claim 1 a kind of transformator harmonic elimination apparatus it is characterised in that：Described solenoid is equidirectional coiling
The solenoid of 22 circles.
6. according to claim 1 a kind of transformator harmonic elimination apparatus it is characterised in that：Described solenoid adopt 2.65 ×
The line footpath of 7.1mm.
7. according to claim 1 a kind of transformator harmonic elimination apparatus it is characterised in that：It is thin that the bottom of described iron yoke is provided with polyester
Film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621003005.0U CN206003607U (en) | 2016-08-31 | 2016-08-31 | A kind of transformator harmonic elimination apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621003005.0U CN206003607U (en) | 2016-08-31 | 2016-08-31 | A kind of transformator harmonic elimination apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206003607U true CN206003607U (en) | 2017-03-08 |
Family
ID=58195396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621003005.0U Active CN206003607U (en) | 2016-08-31 | 2016-08-31 | A kind of transformator harmonic elimination apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206003607U (en) |
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2016
- 2016-08-31 CN CN201621003005.0U patent/CN206003607U/en active Active
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| GR01 | Patent grant |