CN106487018A - The power distribution network neutral conductor Zero-pharse harmonic restraining device that winding technique mode changes - Google Patents
The power distribution network neutral conductor Zero-pharse harmonic restraining device that winding technique mode changes Download PDFInfo
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- CN106487018A CN106487018A CN201611083624.XA CN201611083624A CN106487018A CN 106487018 A CN106487018 A CN 106487018A CN 201611083624 A CN201611083624 A CN 201611083624A CN 106487018 A CN106487018 A CN 106487018A
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- 238000004804 winding Methods 0.000 title claims abstract description 444
- 230000007935 neutral effect Effects 0.000 title claims abstract description 69
- 239000004020 conductor Substances 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 37
- 230000000452 restraining effect Effects 0.000 title claims abstract description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 31
- 229910052742 iron Inorganic materials 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 2
- 230000004907 flux Effects 0.000 description 12
- 230000000694 effects Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000005764 inhibitory process Effects 0.000 description 4
- 230000001629 suppression Effects 0.000 description 4
- CBVWMGCJNPPAAR-HJWRWDBZSA-N (nz)-n-(5-methylheptan-3-ylidene)hydroxylamine Chemical compound CCC(C)C\C(CC)=N/O CBVWMGCJNPPAAR-HJWRWDBZSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The invention discloses the power distribution network neutral conductor Zero-pharse harmonic restraining device that a kind of winding technique mode changes, described device includes：Zero sequence filter, zero sequence filter include three stem stems and six windings, and each umber of turn is identical, insulate between each winding；First and second windings are parallel, be wrapped in by preset direction on the first stem stem, two upper and lower winding Parallel planars are parallel with the horizontal tangent plane of the first stem stem, the upper and lower winding of coiling third and fourth on the second stem stem in the same manner, coiling the 5th and the 6th upper and lower winding on the 3rd stem stem；It is divided into two and half windings per phase winding, it is located on two different stem stems respectively, each phase voltage is located at different stem stem upper half winding Opposite direction connections and is obtained by two, while will be connected in network neutral line after three lower half winding terminal short circuits, three upper half windings are directly in parallel with three phase network.The present invention is that the neutral harmonic current produced in power distribution network provides a low impedance path, filters the neutral harmonic current on the power distribution network neutral conductor.
Description
Technical field
The present invention relates to power quality control technology field, the power distribution network that more particularly to a kind of winding technique mode changes
Neutral conductor Zero-pharse harmonic restraining device.
Background technology
In low-voltage distribution system, three-phase four-wire power supply mode is topmost power supply mode.Modern times with city
Change, the non-linear electrical equipment such as substantial amounts of personal computer, business automation equipment, convertible frequency air-conditioner, mains lighting supply and uninterrupted power source
Equipment can produce substantial amounts of harmonic current, especially Zero-pharse harmonic, even if their separate unit power is less, but because its sum is huge
Greatly, the harmonic pollution for being brought is extremely serious.
Especially 3 times of subharmonic currents are superimposed on the neutral conductor and do not cancel out each other neutral harmonic current, cause and put down completely
The system of weighing apparatus can also produce larger neutral current.Neutral current is excessive to be not only increased distribution network loss and can make
Property line overload overheated.In power distribution network, neutral conductor overload is overheated often causes broken neutral line, and broken neutral line can make neutral point
Potential shift, the single-phase load that neutral potential offset can be to rated voltage for 220V produce harmful effect, cause three-phase equipment
(such as motor etc.) output drop, overheated or even the anomaly such as burn.
Content of the invention
Based on above-mentioned situation, the present invention proposes the power distribution network neutral conductor Zero-pharse harmonic suppression that a kind of winding technique mode changes
Device processed, is that the neutral harmonic current produced in power distribution network provides a low impedance path, makes neutral harmonic current in zero sequence filtering
Flow between device and load, system is flowed back to without the neutral conductor, filter the neutral harmonic current on the power distribution network neutral conductor.
To achieve these goals, the embodiment of technical solution of the present invention is：
The power distribution network neutral conductor Zero-pharse harmonic restraining device that a kind of winding technique mode changes, including zero sequence filter, institute
Stating zero sequence filter includes iron core and coil；
The iron core includes the first stem stem, the second stem stem, the 3rd stem stem, the first iron yoke and the second iron yoke, the coil bag
Include the first winding, the second winding, the tertiary winding, the 4th winding, the 5th winding and the 6th winding, first winding, second around
The number of turn of group, the tertiary winding, the 4th winding, the 5th winding and the 6th winding is identical；
First winding and the second winding are parallel, be wrapped on first stem stem by preset direction, described first around
Group is parallel with the horizontal tangent plane of first stem stem with the Parallel planar of the second winding, between first winding and the second winding
Insulation；
The tertiary winding and the 4th winding are parallel, be wrapped on second stem stem by the preset direction, and described the
The Parallel planar of three winding and the 4th winding is parallel with the horizontal tangent plane of second stem stem, the tertiary winding and the 4th winding
Between insulate；
5th winding and the 6th winding are parallel, be wrapped on the 3rd stem stem by the preset direction, and described the
The Parallel planar of five windings and the 6th winding is parallel with the horizontal tangent plane of the 3rd stem stem, the 5th winding and the 6th winding
Between insulate；
The head end terminals of first winding are connected between A phase conductor and the load in power supply three-phase conducting wire, described
The end terminations of the first winding connect the end terminations of the 4th winding, the head end terminals connection of the tertiary winding
Between the B phase conductor in the power supply three-phase conducting wire and the load, the end terminations connection of the tertiary winding is described
The end terminations of the 6th winding, the C phase that the head end terminals of the 5th winding are connected in the power supply three-phase conducting wire are led
Between line and the load, the end terminations of the 5th winding connect the end terminations of second winding, and described the
The head end terminals of two windings, the 4th winding and the 6th winding access the neutral conductor after being connected.
Compared with prior art, beneficial effects of the present invention are：The power distribution network that winding technique mode of the present invention changes is neutral
Line Zero-pharse harmonic restraining device, the upper and lower winding of two number of turn identicals of winding on each stem stem of zero sequence filter, the first winding,
The tertiary winding and the 5th winding are upper half winding, and the second winding, the 4th winding and the 6th winding are lower half winding, per phase winding quilt
It is divided into two and half windings, is located on two different stem stems respectively, the voltage of each phase is located on different stem stems by two
Half winding Opposite direction connection and obtain, while will be connected on the neutral conductor of electrical network after three lower half winding terminal short circuits, on three
Half winding is directly in parallel with three phase network.After zero sequence filter connects according to the method described above, zero sequence fluxes are cancelled out each other, to zero sequence
The electric current of property shows as leakage reactance, is that the harmonic wave of zero sequence property provides low impedance path, so that the harmonic current of zero sequence property
Flow between zero sequence filter and load, system is not flowed into, realizes the inhibition of neutral harmonic.While zero sequence filter
Two upper and lower windings on each stem stem are parallel, wind in the same direction, reduce by two windings and contact with non-magnet material (as air)
Area, effectively reduces the leakage field of zero sequence filter, reduces the impedance of zero sequence filter, and zero sequence filter is in parallel in the line, and zero
The impedance of sequence wave filter is less, and zero-sequence current more easily flows into zero sequence filter, improves the filter effect of zero sequence filter.
Description of the drawings
Fig. 1 is that the power distribution network neutral conductor Zero-pharse harmonic restraining device wiring that winding technique mode changes in one embodiment is shown
It is intended to；
Fig. 2 is the winding method schematic diagram of zero sequence filter in one embodiment；
Fig. 3 is the elementary diagram of zero sequence filter in one embodiment；
Fig. 4 is the winding method schematic diagram one for hindering zero device in one embodiment；
Fig. 5 is the winding method schematic diagram two for hindering zero device in one embodiment；
Fig. 6 is the power distribution network neutral conductor zero sequence changed based on winding technique mode in one specific example of Fig. 1 shown device
Harmonic suppression apparatus wiring schematic diagram.
Specific embodiment
For making the objects, technical solutions and advantages of the present invention become more apparent, below in conjunction with drawings and Examples, to this
Invention is described in further detail.It should be appreciated that specific embodiment described herein is only in order to explain the present invention,
Protection scope of the present invention is not limited.
The power distribution network neutral conductor Zero-pharse harmonic restraining device that winding technique mode changes in one embodiment, such as Fig. 1,2,3
Shown, including zero sequence filter 101, the zero sequence filter includes iron core and coil；
The iron core includes the first stem stem C1, the second stem stem C2, the 3rd stem stem C3, the first iron yoke Y1 and the second iron yoke Y2,
The coil includes the first winding W11, the second winding W12, tertiary winding W21, the 4th winding W22, the 5th winding W31 and the 6th
Winding W32, the number of turn of first winding, the second winding, the tertiary winding, the 4th winding, the 5th winding and the 6th winding are identical；
First winding and the second winding are parallel, be wrapped on first stem stem by preset direction, described first around
Group is parallel with the horizontal tangent plane of first stem stem with the Parallel planar of the second winding, between first winding and the second winding
Insulation；
The tertiary winding and the 4th winding are parallel, be wrapped on second stem stem by the preset direction, and described the
The Parallel planar of three winding and the 4th winding is parallel with the horizontal tangent plane of second stem stem, the tertiary winding and the 4th winding
Between insulate；
5th winding and the 6th winding are parallel, be wrapped on the 3rd stem stem by the preset direction, and described the
The Parallel planar of five windings and the 6th winding is parallel with the horizontal tangent plane of the 3rd stem stem, the 5th winding and the 6th winding
Between insulate；
The head end terminals 11 of first winding are connected between A phase conductor and the load in power supply three-phase conducting wire, institute
The end terminations 11 ' for stating the first winding connect the end terminations 22 ' of the 4th winding, and the head end of the tertiary winding connects
Line end 21 is connected between the B phase conductor in the power supply three-phase conducting wire and the load, the end wiring of the tertiary winding
The end terminations 32 ' of 21 ' connection of end the 6th winding, the head end terminals 31 of the 5th winding are connected to the power supply
Between C phase conductor and the load in three-phase conducting wire, the end terminations 31 ' of the 5th winding connect second winding
End terminations 12 ', the head end terminals 12,22,32 of second winding, the 4th winding and the 6th winding are accessed after being connected
The neutral conductor.
Here, the Parallel planar of the first winding and the second winding as indicated with 2, is first winding and the second winding in institute
First stem stem one end the plane for being formed together is stated, the Parallel planar of the tertiary winding and the 4th winding is described the in the same manner
Three winding and the 4th winding in described second stem stem one end and the plane that formed together, the 5th winding and the 6th winding
Parallel planar is the 5th winding and the 6th winding in described 3rd stem stem one end and the plane that formed together.
The horizontal tangent plane of the first stem stem is that cutting plane obtained by object is opened in the axis cutting of vertical first stem stem, in the same manner
The horizontal tangent plane of two stem stems is that cutting plane obtained by object is opened in the axis cutting of vertical second stem stem, laterally the cutting of the 3rd stem stem
Face is that the cutting plane obtained by object is opened in the axis cutting of vertical 3rd stem stem.
Specifically, upper and lower two windings are wound with each core limb of zero sequence filter respectively, the first winding,
Three winding and the 5th winding are upper half winding, and the second winding, the 4th winding and the 6th winding are lower half winding, on three core limbs
Six umber of turns equal, be divided into two and half windings per phase winding, be located on two different stem stems respectively, each phase
Voltage is obtained by two half winding Opposite direction connections being located on different stem stems, while by after three lower half winding terminal short circuits
It is connected on the neutral conductor of electrical network, three upper half windings are directly in parallel with three phase network.After connecting shown in Fig. 2, zero sequence magnetic
Lead to and cancel out each other, the electric current to zero sequence property shows as leakage reactance, be that the harmonic wave of zero sequence property provides low impedance path, so that zero
Power distribution network neutral conductor Zero-pharse harmonic restraining device that the harmonic current of sequence matter changes in low pressure winding winding method and non-linear
Flow between load, system is not flowed into, realizes the inhibition of neutral harmonic.
Here, the winding on each core limb of zero sequence filter is using two strands are parallel, equidirectional winding, each core limb
In, the first winding, the tertiary winding and the 5th winding be upper half winding, the second winding, the 4th winding and the 6th winding be lower half around
Group, all presses identical direction from two strands of upper half winding and lower half winding and winds along iron core column sub-thread, and two strands are in space
In be distributed in laminar, the wire from upper half winding around being made as interior winding, wire from lower half winding around being made as outer winding, two
Insulate between strand.The winding method can reduce the area that upper and lower winding is contacted with non-magnet material (as air), effectively drop
The leakage field of low zero sequence filter, reduces the impedance of zero sequence filter, and zero sequence filter is in parallel in the line, the resistance of zero sequence filter
Anti- less, zero-sequence current more easily flows into zero sequence filter, improves the filter effect of zero sequence filter.
It is evidenced from the above discussion that, the power distribution network neutral conductor Zero-pharse harmonic restraining device that winding technique mode of the present invention changes,
Neutral harmonic current for producing in power distribution network provides a low impedance path, makes neutral harmonic current in zero sequence filter and load
Between flow, flow back to system without the neutral conductor, filter the neutral harmonic current on the power distribution network neutral conductor.
Additionally, in a specific example, the power distribution network neutral conductor Zero-pharse harmonic suppression that the winding technique mode changes
Device also includes to hinder zero device, first switch, second switch and the 3rd switch；
Zero device of the resistance includes four-limbed, the 7th winding, the 8th winding and the 9th winding；
7th winding, the 8th winding and the 9th winding are wrapped on the four-limbed in the same direction, the 7th winding,
Insulate between 8th winding and the 9th winding, the number of turn of the 7th winding, the 8th winding and the 9th winding is identical；
The head end terminals of the 7th winding connect the A phase conductor in the power supply three-phase conducting wire, the 7th winding
End terminations connect the head end terminals of the first winding of the zero sequence filter and the load, the 8th winding respectively
Head end terminals connect B phase conductor in the power supply three-phase conducting wire, the end terminations of the 8th winding connect respectively
The head end terminals of the zero sequence filter tertiary winding and the load, the head end terminals connection of the 9th winding are described
C phase conductor in power supply three-phase conducting wire, the end terminations of the 9th winding connect respectively the zero sequence filter the 5th around
The head end terminals of group and the load, the first switch and the 7th winding parallel, the second switch and described
Eight winding parallels, the 3rd switch and the 9th winding parallel.
Here, zero device of resistance can effectively suppress the zero-sequence current caused by system unbalanced source voltage by zero sequence filter
The neutral conductor is flowed into, the filter effect of zero sequence filter is improved, meets practical application needs.
When the electric current of A, B, C three-phase positive-negative sequence is by hindering zero device, as three-phase positive-negative sequence current is equal in magnitude, angle phase
120 ° are differed from, and three-phase windings are wrapped in same iron core column, so the magnetic flux superposition sum for producing is zero, zero device of resistance is hindered to which
Anti- is also zero, when neutral harmonic current is by hindering zero device, due to neutral harmonic current same-phase, so the magnetic flux superposition for producing
Very big magnetic flux can be produced for three's sum, now hinder zero device and assume very big impedance to neutral harmonic current, from having reached drop
The purpose of low zero-sequence current.
Specifically, zero device of resistance can control whether to come into operation according to actual requirement of engineering, when first switch, second switch
When switching off with the 3rd, zero device of resistance comes into operation, and when first switch, second switch and the 3rd switch closure, zero device of resistance is not
Come into operation.
Additionally, in a specific example, the 7th winding, the 8th winding and the 9th winding be parallel, by clockwise or
Counterclockwise it is wrapped on the four-limbed, Parallel planar and the institute of the 7th winding, the 8th winding and the 9th winding
The horizontal tangent plane for stating four-limbed is parallel.
Here, the 7th winding, the 8th winding and the 9th winding Parallel planar as shown in figure 4, for the described 7th around
Group, the 8th winding and the 9th winding are in described four-limbed one end and the plane that formed together.
The horizontal tangent plane of the four-limbed is that the cutting plane obtained by object is opened in the axis cutting of vertical four-limbed.
Specifically, as shown in figure 4,401 for hindering the core limb of zero device, 402 is the interior winding of A phase line coiling, and 403 is B phase
The middle winding of line coiling, 404 is the outer winding of C phase line coiling.Identical direction is all pressed along iron per strand in A, B, C compenzine
Stem stem sub-thread winds, and compenzine is distributed in laminar in space, and, used as interior winding, B phase line is used as middle winding, C phase line for A phase line
As outer winding.
Additionally, in a specific example, the 7th winding, the 8th winding and the 9th winding be parallel, by clockwise or
Counterclockwise it is wrapped on the four-limbed, Parallel planar and the institute of the 7th winding, the 8th winding and the 9th winding
The longitudinal tangent plane for stating four-limbed is parallel.
Here, the 7th winding, the 8th winding and the 9th winding Parallel planar as shown in figure 5, for the described 7th around
Group, the 8th winding and the 9th winding are in described four-limbed one end and the plane that formed together.
Longitudinal tangent plane of the four-limbed is that the cutting plane obtained by object is opened in the axis cutting of parallel four-limbed.
Specifically, as shown in figure 5,501 is A line, 502 is B line, and 503 is C line, and system power is by as figure direction of arrow stream
Enter zero device of resistance, system three-phase conducting wire is wrapped on a core limb with sequence, winding method is wound on using compenzine same parallel
On root core limb, mutually insulated between compenzine.
Here, above two can greatly reduce the leakage field of zero device of resistance using parallel, equidirectional winding method, improve which
Service behaviour.
Additionally, in a specific example, the 7th winding, the 8th winding and the 9th winding are successively in the direction of the clock
It is wrapped on the four-limbed, or the 7th winding, the 8th winding and the 9th winding is wound successively counterclockwise
On the four-limbed.
Specifically, zero device winding method of resistance only the line of same sequence, i.e., three successively along iron core by direction clockwise or counterclockwise
Winding (first around complete further around second, second around complete further around the 3rd).Hinder zero device and leach system voltage imbalance and cause
Zero-sequence current, when neutral harmonic current is by hindering zero device, due to neutral harmonic current same-phase, so the magnetic flux for producing is folded
Add as three's sum and very big magnetic flux can be produced, now hinder zero device and assume very big impedance to neutral harmonic current, from reaching
Reduce the purpose of zero-sequence current.
Additionally, in a specific example, the preset direction is clockwise or counterclockwise.
Specifically, six windings of zero sequence filter are wrapped on stem stem using clockwise or counterclockwise.Press
After connecting shown in Fig. 2, zero sequence fluxes are cancelled out each other, and the electric current to zero sequence property shows as leakage reactance, are the harmonic wave of zero sequence property
There is provided low impedance path, so that the power distribution network neutral conductor zero that the harmonic current of zero sequence property changes in low pressure winding winding method
Flow between sequence harmonic suppression apparatus and nonlinear-load, system is not flowed into, realizes the inhibition of neutral harmonic.
Additionally, in a specific example, the first winding of the zero sequence filter, the second winding, the tertiary winding, the 4th
The wire gauge of winding, the 5th winding and the 6th winding is identical.
Additionally, in a specific example, the wire rule of the 7th winding, the 8th winding and the 9th winding of zero device of the resistance
Lattice are identical.
Here, wire gauge includes lead material, radius (round wire) or width and thickness (strip conductor).
Specifically, the wire gauge of zero sequence filter and zero device winding of resistance determines according to circuit rated current size.
In order to more fully understand said apparatus, the power distribution network that a winding technique mode of the present invention detailed below changes
The application example of neutral conductor Zero-pharse harmonic restraining device.
As shown in fig. 6, the application example can include zero sequence filter 601, zero device 602 of resistance and switch K1, K2, K3；
As shown in Fig. 2 the zero sequence filter includes iron core and coil；
The iron core includes the first stem stem C1, the second stem stem C2, the 3rd stem stem C3, the first iron yoke Y1 and the second iron yoke Y2,
The coil includes the first winding W11, the second winding W12, tertiary winding W21, the 4th winding W22, the 5th winding W31 and the 6th
Winding W32, the number of turn of first winding, the second winding, the tertiary winding, the 4th winding, the 5th winding and the 6th winding are identical；
As shown in figure 3, first winding and the second winding are parallel, be wrapped on first stem stem by preset direction,
The Parallel planar of first winding and the second winding is parallel with the horizontal tangent plane of first stem stem, first winding and
Insulate between two windings；
The tertiary winding and the 4th winding are parallel, be wrapped on second stem stem by the preset direction, and described the
The Parallel planar of three winding and the 4th winding is parallel with the horizontal tangent plane of second stem stem, the tertiary winding and the 4th winding
Between insulate；
5th winding and the 6th winding are parallel, be wrapped on the 3rd stem stem by the preset direction, and described the
The Parallel planar of five windings and the 6th winding is parallel with the horizontal tangent plane of the 3rd stem stem, the 5th winding and the 6th winding
Between insulate；
The preset direction is clockwise or counterclockwise；
Zero device of the resistance includes four-limbed, the 7th winding, the 8th winding and the 9th winding, the 7th winding, the 8th
Insulate between winding and the 9th winding, the number of turn of the 7th winding, the 8th winding and the 9th winding is identical, the described 7th around
Group, the 8th winding and the 9th winding be parallel, by being wrapped on the four-limbed clockwise or counterclockwise, the described 7th around
The Parallel planar of group, the 8th winding and the 9th winding is parallel with the horizontal tangent plane of the four-limbed；As shown in figure 4,401 is resistance
The core limb of zero device, 402 is the interior winding of A phase line coiling, and 403 is the middle winding of B phase line coiling, and 404 is C phase line coiling
Outer winding.All press identical direction to wind along iron core column sub-thread in A, B, C compenzine per strand, compenzine is in laminar in space
Distribution, used as interior winding, used as middle winding, C phase line is used as outer winding for B phase line for A phase line；
The head end terminals of the 7th winding of zero device of the resistance connect the A phase conductor in the power supply three-phase conducting wire, described
The end terminations of the 7th winding connect the head end terminals 11 of the first winding of the zero sequence filter and load, the resistance respectively
The head end terminals of the 8th winding of zero device connect the B phase conductor in the power supply three-phase conducting wire, the end of the 8th winding
Terminals connect the head end terminals 21 of the zero sequence filter tertiary winding and the load respectively, and the 9th of zero device of the resistance the
The head end terminals of winding connect the C phase conductor in the power supply three-phase conducting wire, the end terminations difference of the 9th winding
Connect the head end terminals 31 of the 5th winding of the zero sequence filter and the load, the first winding of the zero sequence filter
End terminations 11 ' connect the end terminations 22 ' of the 4th winding, and the end of the tertiary winding of the zero sequence filter connects
Line end 21 ' connects the end terminations 32 ' of the 6th winding, the end terminations of the 5th winding of the zero sequence filter
The end terminations 12 ' of 31 ' connection second windings, the second winding of the zero sequence filter, the 4th winding and the 6th around
The head end terminals 12,22,32 of group access the neutral conductor after being connected.
Switch K1 and the 7th winding parallel of zero device of the resistance, switch the 8th winding parallel of K2 and zero device of the resistance, open
Close the 9th winding parallel of K3 and zero device of the resistance.
Hinder zero device to control whether to come into operation according to actual requirement of engineering, in Fig. 6, when switch K1, K2, K3 disconnect
When, zero device of resistance comes into operation, and when K1, K2, K3 closure is switched, zero device of resistance does not come into operation.
First winding of the zero sequence filter, the second winding, the tertiary winding, the 4th winding, the 5th winding and the 6th around
The wire gauge of group is identical.The wire gauge of the 7th winding, the 8th winding and the 9th winding of zero device of the resistance is identical.Here,
Wire gauge includes lead material, radius (round wire) or width and thickness (strip conductor).Specifically, zero sequence filter and zero device of resistance
The wire gauge of winding determines according to circuit rated current size.
Here, on the circuit of zero sequence filter access point, series connection one hinders zero device, and the triple line accessed from mains side is twined with sequence
It is wound on zero device core limb of resistance, winding method is wound on same core limb parallel using compenzine, between compenzine mutually absolutely
Edge.When the electric current of A, B, C three-phase positive-negative sequence is by hindering zero device, as three-phase positive-negative sequence current is equal in magnitude, angle is differed
120 °, and three-phase windings are wrapped in same iron core column, so the magnetic flux superposition sum for producing is zero, zero device of resistance is to its impedance
Also it is zero, when neutral harmonic current is by hindering zero device, due to neutral harmonic current same-phase, so the magnetic flux for producing is superposed to
Three's sum can produce very big magnetic flux, now hinder zero device and assume very big impedance to neutral harmonic current, from having reached reduction
The purpose of zero-sequence current.The leakage field of zero device of resistance can be greatly reduced using parallel, equidirectional winding method, improve its workability
Energy.
Be wound with upper and lower two windings on each core limb of zero sequence filter respectively, six on three core limbs around
Group equal turn numbers, structure are consistent, and after connecting shown in Fig. 6, zero sequence fluxes are cancelled out each other, and the electric current to zero sequence property shows as
Leakage reactance, is that the harmonic wave of zero sequence property provides low impedance path, so that the harmonic current of zero sequence property is in low pressure winding coiling side
Flow between the power distribution network neutral conductor Zero-pharse harmonic restraining device of formula change and nonlinear-load, system is not flowed into, realize neutral
The inhibition of line harmonics.It is parallel relationship that is, with load in the line that zero sequence filter is in parallel, and the zero sequence impedance of wave filter is got over
Little, zero-sequence current more easily flows into zero sequence filter, and zero-sequence current shunting action is more obvious, and filter effect is also better.Right
Zero sequence filter winding makees following design：Winding on each core limb is using two strands are parallel, equidirectional winding, and reserves two
Four terminals of strand are connected with system and other windings, and two strands are respectively from upper half winding and lower half winding, two strands
Between insulate.The winding method can reduce the area that upper and lower winding is contacted with non-magnet material (as air), effectively reduce by zero
The leakage field of sequence wave filter, reduces the impedance of zero sequence filter, improves the filter effect of zero sequence filter.
It is evidenced from the above discussion that, the present embodiment hinders the zero sequence that zero device effectively can suppress to be caused by system unbalanced source voltage
Electric current flows into the neutral conductor by zero sequence filter, and resistance zero device three windings are parallel, by being wrapped in core clockwise or counterclockwise
On post, the Parallel planar of three windings is parallel with the horizontal tangent plane of stem stem, can be significantly using parallel, equidirectional winding method
Reduce the leakage field of zero device of resistance, improve its service behaviour；The load unbalanced zero-sequence current for causing of zero sequence filter filtering appts, right
It is serious uneven with obvious load balance effect that single-phase load is caused, and winds two circles on each stem stem of zero sequence filter
The upper and lower winding of number identical, is divided into two and half windings per phase winding, is located on two different stem stems respectively, each phase
Voltage is obtained by two half winding Opposite direction connections being located on different stem stems, while by after three lower half winding terminal short circuits
It is connected on the neutral conductor of electrical network, three upper half windings are directly in parallel with three phase network.Zero sequence filter connects according to the method described above
After connecing, zero sequence fluxes are cancelled out each other, and zero sequence impedance reduces, and are that the harmonic wave of zero sequence property provides low impedance path.While each core
Two upper and lower windings on post are parallel, wind in the same direction, reduce the area that two windings are contacted with non-magnet material (as air),
Effectively reduce the leakage field of zero sequence filter, reduce the impedance of zero sequence filter, improve the filter effect of zero sequence filter, and one
Determine in degree, to reduce wave filter volume, reduces cost, the method for designing are simple, and exploitativeness is strong, and reliability is high.
Each technical characteristic of embodiment described above arbitrarily can be combined, for making description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only have expressed the several embodiments of the present invention, and its description is more concrete and detailed, but simultaneously
Therefore can not be construed as limiting the scope of the patent.It should be pointed out that coming for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, can also make some deformation and improvement, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be defined by claims.
Claims (8)
1. the power distribution network neutral conductor Zero-pharse harmonic restraining device that a kind of winding technique mode changes, it is characterised in that including zero sequence
Wave filter, the zero sequence filter include iron core and coil；
The iron core includes the first stem stem, the second stem stem, the 3rd stem stem, the first iron yoke and the second iron yoke, and the coil includes
One winding, the second winding, the tertiary winding, the 4th winding, the 5th winding and the 6th winding, first winding, the second winding,
The number of turn of three winding, the 4th winding, the 5th winding and the 6th winding is identical；
First winding and the second winding are parallel, be wrapped on first stem stem by preset direction, first winding and
The Parallel planar of the second winding is parallel with the horizontal tangent plane of first stem stem, between first winding and the second winding absolutely
Edge；
The tertiary winding and the 4th winding are parallel, be wrapped on second stem stem by the preset direction, the described 3rd around
Group is parallel with the horizontal tangent plane of second stem stem with the Parallel planar of the 4th winding, between the tertiary winding and the 4th winding
Insulation；
5th winding and the 6th winding are parallel, be wrapped on the 3rd stem stem by the preset direction, the described 5th around
Group is parallel with the horizontal tangent plane of the 3rd stem stem with the Parallel planar of the 6th winding, between the 5th winding and the 6th winding
Insulation；
The head end terminals of first winding are connected between A phase conductor and the load in power supply three-phase conducting wire, and described first
The end terminations of winding connect the end terminations of the 4th winding, and the head end terminals of the tertiary winding are connected to institute
State between the B phase conductor in power supply three-phase conducting wire and the load, the end terminations connection the described 6th of the tertiary winding
The end terminations of winding, the head end terminals of the 5th winding be connected to the C phase conductor in the power supply three-phase conducting wire and
Between the load, the end terminations of the 5th winding connect the end terminations of second winding, described second around
The head end terminals of group, the 4th winding and the 6th winding access the neutral conductor after being connected.
2. the power distribution network neutral conductor Zero-pharse harmonic restraining device that winding technique mode according to claim 1 changes, its are special
Levy and be, also include to hinder zero device, first switch, second switch and the 3rd switch；
Zero device of the resistance includes four-limbed, the 7th winding, the 8th winding and the 9th winding；
7th winding, the 8th winding and the 9th winding are wrapped on the four-limbed in the same direction, the 7th winding, the 8th
Insulate between winding and the 9th winding, the number of turn of the 7th winding, the 8th winding and the 9th winding is identical；
The head end terminals of the 7th winding connect the A phase conductor in the power supply three-phase conducting wire, the end of the 7th winding
Termination line end connects the head end terminals of the first winding of the zero sequence filter and the load, the head of the 8th winding respectively
Termination line end connects the B phase conductor in the power supply three-phase conducting wire, and the end terminations of the 8th winding connect described respectively
The head end terminals of the zero sequence filter tertiary winding and the load, the head end terminals of the 9th winding connect the power supply
C phase conductor in three-phase conducting wire, the end terminations of the 9th winding connect the 5th winding of the zero sequence filter respectively
Head end terminals and the load, the first switch and the 7th winding parallel, the second switch with the described 8th around
Group is in parallel, and the described 3rd switchs and the 9th winding parallel.
3. the power distribution network neutral conductor Zero-pharse harmonic restraining device that winding technique mode according to claim 2 changes, its are special
Levy and be, the 7th winding, the 8th winding and the 9th winding be parallel, by being wrapped in the described 4th clockwise or counterclockwise
On stem stem, the Parallel planar of the 7th winding, the 8th winding and the 9th winding is parallel with the horizontal tangent plane of the four-limbed.
4. the power distribution network neutral conductor Zero-pharse harmonic restraining device that winding technique mode according to claim 2 changes, its are special
Levy and be, the 7th winding, the 8th winding and the 9th winding be parallel, by being wrapped in the described 4th clockwise or counterclockwise
On stem stem, the Parallel planar of the 7th winding, the 8th winding and the 9th winding is parallel with longitudinal tangent plane of the four-limbed.
5. the power distribution network neutral conductor Zero-pharse harmonic restraining device that winding technique mode according to claim 2 changes, its are special
Levy and be, the 7th winding, the 8th winding and the 9th winding are wrapped on the four-limbed successively in the direction of the clock, or
Described in person, the 7th winding, the 8th winding and the 9th winding are wrapped on the four-limbed successively counterclockwise.
6. the power distribution network neutral conductor Zero-pharse harmonic restraining device that winding technique mode according to claim 1 changes, its are special
Levy and be, the preset direction is clockwise or counterclockwise.
7. the power distribution network neutral conductor Zero-pharse harmonic restraining device that winding technique mode according to claim 1 changes, its are special
Levy and be, the first winding of the zero sequence filter, the second winding, the tertiary winding, the 4th winding, the 5th winding and the 6th winding
Wire gauge identical.
8. the power distribution network neutral conductor Zero-pharse harmonic that winding technique mode as claimed in any of claims 2 to 5 changes
Restraining device, it is characterised in that the wire gauge of the 7th winding, the 8th winding and the 9th winding of zero device of the resistance is identical.
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| CN201611083624.XA CN106487018A (en) | 2016-11-30 | 2016-11-30 | The power distribution network neutral conductor Zero-pharse harmonic restraining device that winding technique mode changes |
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| CN101291065A (en) * | 2008-05-22 | 2008-10-22 | 华北电力大学 | A low-voltage distribution network neutral line harmonic suppression device |
| CN202616777U (en) * | 2012-04-24 | 2012-12-19 | 深圳市科雷特能源科技股份有限公司 | Phase-shifting zero-sequence harmonic filter and three-phase four-wire AC power supply system |
| CN103700473A (en) * | 2013-12-12 | 2014-04-02 | 华为技术有限公司 | Coupling inductor and power converter |
| CN103928936A (en) * | 2014-04-30 | 2014-07-16 | 杭州千目电力科技有限公司 | Converter and converting device for reducing effect of zero-sequence current on transformer |
| KR20160092788A (en) * | 2015-01-28 | 2016-08-05 | 동인시스템 주식회사 | Neutral line current remover |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101291065A (en) * | 2008-05-22 | 2008-10-22 | 华北电力大学 | A low-voltage distribution network neutral line harmonic suppression device |
| CN202616777U (en) * | 2012-04-24 | 2012-12-19 | 深圳市科雷特能源科技股份有限公司 | Phase-shifting zero-sequence harmonic filter and three-phase four-wire AC power supply system |
| CN103700473A (en) * | 2013-12-12 | 2014-04-02 | 华为技术有限公司 | Coupling inductor and power converter |
| CN103928936A (en) * | 2014-04-30 | 2014-07-16 | 杭州千目电力科技有限公司 | Converter and converting device for reducing effect of zero-sequence current on transformer |
| KR20160092788A (en) * | 2015-01-28 | 2016-08-05 | 동인시스템 주식회사 | Neutral line current remover |
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