CN107507698A - A kind of transformer for suppressing function with D.C. magnetic biasing - Google Patents
A kind of transformer for suppressing function with D.C. magnetic biasing Download PDFInfo
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- CN107507698A CN107507698A CN201710766381.8A CN201710766381A CN107507698A CN 107507698 A CN107507698 A CN 107507698A CN 201710766381 A CN201710766381 A CN 201710766381A CN 107507698 A CN107507698 A CN 107507698A
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- 238000004804 winding Methods 0.000 claims abstract description 346
- 230000007935 neutral effect Effects 0.000 claims abstract description 29
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 19
- 230000001629 suppression Effects 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 abstract description 6
- 230000005284 excitation Effects 0.000 abstract description 5
- 230000004907 flux Effects 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005404 monopole Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
The invention discloses a kind of transformer for suppressing function with D.C. magnetic biasing, including iron core and winding, winding by once, secondary winding forms, first winding wherein per phase uses tortuosity attachment structure, first winding per phase is divided into two sections of windings and formed, and forms and is respectively wound on different iron cores per two sections of windings of phase first winding.Transformer station's short circuit current level, control protective unit and small reactor on neutral point etc. influence very little；Tortuosity winding both provided very high open-circuit excitation impedance, provided low-down leakage reactance again.
Description
Technical field
The present invention relates to a kind of transformer, more particularly, to a kind of transformer for suppressing function with D.C. magnetic biasing.
Background technology
High voltage dc transmission technology is obtained with the advantages that fed distance is long, transmission capacity is big and transmission losses is small in China
Rapidly development.But HVDC transmission system also can bring many adverse effects to original AC network, such as when straight
Transmission line of electricity is flowed during debugging, maintenance or in the case of failure by monopole -- when being run in a manner of Ground return, DC current can be from
The neutral point inflow transformer winding of transformer grounding, the transformer of normal operation is caused to produce D.C. magnetic biasing problem, so that
Transformer loss increase, noise increase, vibration aggravation, to transformer in itself and the safe and stable operation of AC network is brought
Seriously endanger.And Zhejiang, Jiangsu, Shanghai Power Network etc. are AC-DC hybrid power grid, safety and stability of the D.C. magnetic biasing to transformer
Influence on system operation is larger.
And transformer is limited by factors the tolerance of DC current, such as heating limitation, the knot of winding, iron core
Component partial overheat limitation, Harmonious Waves in Power Systems limit value or noise level limit value etc..From different core structure three-phase transformers
Analysis understands that reaction of the transformer to D.C. magnetic biasing is relevant with transformer device structure.Three-phase three-limb transformer, direct current flux is in iron
Without passage in core, other structures part and transformer oil need to be passed through and returned from fuel tank；Because the magnetic resistance of transformer oil is larger, so directly
Magnetic flux very little is flowed, therefore can allow to pass through larger DC current from neutral point；And DC current is in three-phase five-limb transformer
Middle to be returned by return yoke, the section of magnetic flux backward channel is smaller, so as to occur iron core under relatively low magnetic flux density
Saturation, the influence of DC current is more obvious, allows the DC current that passes through small compared with three-phase three-limb transformer in ground wire.
And in order to suppress transformer neutral point DC magnetic biasing electric current, more using series connected resistance, series-capacitor, reverse current penalty method
Etc. D.C. magnetic biasing braking measure, but these methods are small to transformer station's short circuit current level, control protective unit and neutral point
Reactance etc. produces considerable influence.
The content of the invention
The present invention is to solve existing D.C. high voltage transmission there is suppression transformer when carrying out D.C. magnetic biasing braking measure,
The present situations such as considerable influence easily are produced to transformer station's short circuit current level, control protective unit and small reactor on neutral point and provided
A kind of transformer station's short circuit current level, control protective unit and small reactor on neutral point etc. influence very little there is D.C. magnetic biasing
Suppress the transformer of function.
The present invention is that concrete technical scheme is used by solving above-mentioned technical problem：There is one kind D.C. magnetic biasing to suppress work(
The transformer of energy, including iron core and winding, it is characterised in that：Winding by once, secondary winding form, wherein per phase once around
Group uses tortuosity attachment structure, and the first winding per phase is divided into two sections of windings and formed, and forms two per phase first winding
Section winding is respectively wound on different iron cores.Transformer station's short circuit current level, control protective unit and the small electricity of neutral point
Anti- wait influences very little；Tortuosity winding both provided very high open-circuit excitation impedance, provided low-down leakage reactance again.
Preferably, there is the winding of the number of turn such as two sections on per column iron core.Improve the harmony of each winding.
Preferably, the three-phase of described first winding is respectively A phases, B phases and C phases, the neutral point of first winding is N, A
Every phase winding of phase, B phases and C phases is divided into two sections of parts of equal turn numbers, and wherein A phase windings are divided into winding w1With winding w4Two
Section winding is formed, and B phase windings are divided into winding w2With winding w5Two sections of windings are formed, C phase windings are divided into winding w3With winding w6Two sections
Winding is formed；Wherein winding w1With winding w4, winding w2With winding w5, winding w3With winding w6Arranged using radial same core, its
In with the joining winding w of neutral point4, winding w5, winding w6Using inner arrangement；Using A phases as 12 direction definition of clock
Phase angle ZAB, winding connection Z1ABMiddle winding w1It it is 30 ° along clockwise phase shifting angle.
Preferably, the three-phase of described first winding is respectively A phases, B phases and C phases, the neutral point of first winding is N, A
Every phase winding of phase, B phases and C phases is divided into two sections of parts of equal turn numbers, and wherein A phase windings are divided into winding w1With winding w4Two
Section winding is formed, and B phase windings are divided into winding w2With winding w5Two sections of windings are formed, C phase windings are divided into winding w3With winding w6Two sections
Winding is formed；Wherein winding w1With winding w6, winding w2With winding w4, winding w3With winding w5Arranged using radial same core, its
In with the joining winding w of neutral point4, winding w5, winding w6Using inner arrangement；Using A phases as 12 direction definition of clock
Phase angle ZAC, winding connection Z11ACMiddle winding w1It it is 30 ° along phase shifting angle counterclockwise.
Preferably, the three-phase of described first winding is respectively A phases, B phases and C phases, the neutral point of first winding is N, A
Every phase winding of phase, B phases and C phases is divided into two sections of parts of equal turn numbers, and wherein A phase windings are divided into winding w1With winding w4Two sections
Winding is formed, and B phase windings are divided into winding w2With winding w5Two sections of windings are formed, C phase windings are divided into winding w3With winding w6Two sections around
Group is formed, wherein winding w1With winding w4, winding w2With winding w5, winding w3With winding w6Using radial same core arrangement, wherein
With the joining winding w of neutral point4, winding w5, winding w6Using inner arrangement；Phase is defined by 12 directions of clock of A phases
Parallactic angle ZAB, winding connection Z7ABMiddle winding w1It it is 150 ° along phase shifting angle counterclockwise.
Preferably, the three-phase of described first winding is respectively A phases, B phases and C phases, the neutral point of first winding is N, A
Every phase winding of phase, B phases and C phases is divided into two sections of parts of equal turn numbers, and wherein A phase windings are by winding w1With winding w4Two sections of strings
Connection connects and composes, and B phase windings are by winding w2With winding w5Two sections are connected in series composition, C phase windings by winding w3With winding w6Two sections
It is connected in series composition, wherein winding w1With winding w4, winding w2With winding w5, winding w3With winding w6Using radial same core row
Row, wherein with the joining winding w of neutral point4, winding w5, winding w6Using inner arrangement；Using A phases as the point side of clock 12
To definition phase angle ZAC, winding connection Z5ACMiddle winding w1It it is 150 ° along clockwise phase shifting angle.
The beneficial effects of the invention are as follows：Transformer station's short circuit current level, control protective unit and small reactor on neutral point etc.
Influence very little；Tortuosity winding both provided very high open-circuit excitation impedance, provided low-down leakage reactance again.
Brief description of the drawings：
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
Fig. 1 is a kind of meander configuration Transformer Winding draw bail for the transformer for suppressing function with D.C. magnetic biasing of the present invention
Schematic diagram.
Fig. 2 is a kind of a kind of winding connection sketch of transformer for suppressing function with D.C. magnetic biasing of the present invention.
Fig. 3 is Fig. 2 winding connection phase angle and its phase shifting angle schematic diagram.
Fig. 4 is a kind of another winding connection sketch of transformer for suppressing function with D.C. magnetic biasing of the present invention.
Fig. 5 is Fig. 4 winding connection phase angle and its phase shifting angle schematic diagram.
Fig. 6 is a kind of another winding connection sketch of transformer for suppressing function with D.C. magnetic biasing of the present invention.
Fig. 7 is Fig. 6 winding connection phase angle and its phase shifting angle schematic diagram.
Fig. 8 is a kind of another winding connection sketch of transformer for suppressing function with D.C. magnetic biasing of the present invention.
Fig. 9 is Fig. 8 winding connection phase angle and its phase shifting angle schematic diagram.
Embodiment
Embodiment 1：
In embodiment shown in Fig. 1, Fig. 2, Fig. 3, it is a kind of with D.C. magnetic biasing suppress function transformer, including iron core and
Winding, winding by once, secondary winding form, wherein use tortuosity attachment structure per the first winding of phase, every the one of phase
Secondary winding is divided into two sections of windings and formed, and forms and is respectively wound on different iron cores per two sections of windings of phase first winding.
There is the winding of the number of turn such as two sections on per column iron core.The three-phase of first winding is respectively A phases, B phases and C phases, in first winding
Property point is N, and every phase winding of A phases, B phases and C phases is divided into two sections of parts of equal turn numbers, and wherein A phase windings are divided into winding w1
With winding w4Two sections of windings are formed, and B phase windings are divided into winding w2With winding w5Two sections of windings are formed, C phase windings are divided into winding w3With
Winding w6Two sections of windings are formed；Wherein winding w1With winding w4, winding w2With winding w5, winding w3With winding w6Using radial same
Core arrange, wherein with the joining winding w of neutral point4, winding w5, winding w6Using inner arrangement；Using A phases as clock 12
Point direction defines phase angle ZAB, winding connection Z1ABMiddle winding w1It it is 30 ° along clockwise phase shifting angle.Depicted point generation in figure
The same polarity of table winding.
The tortuosity of three-phase transformer first winding shown in Fig. 1 couples, and A, B, C are first winding three-phase, Ia, Ib, Ic mono-
The three-phase current of secondary winding, the magnetic flux as caused by Ia, Ib, IcPer column iron core magnetic flux circle is waited by two
Several windings produces.
To forward-order current：
To negative-sequence current：
But for zero-sequence current：
In above formula (1), (2)：α=ej·2π/3, α2=e-j·2π/3。
Each net magnetic flux amplitude of iron core column is produced by positive sequence and negative-sequence current, all forFor each iron of zero-sequence current
The net magnetic flux amplitude of stem goes to zero.Therefore, tortuosity winding both provided very high open-circuit excitation impedance, open-circuit excitation impedance by
Positive sequence and negative-sequence current produce；Low-down leakage reactance is provided again, and leakage reactance is produced by zero-sequence current.
IdcFor DC magnetic bias current, if Ia=Ib=Ic=Idc/ 3, three net direct current fluxes of core limb mutually support up and down
Disappear and level off to zero, thus it is unshakable in one's determination direct current flux is not present, effectively prevent transformer because of D.C. magnetic biasing saturation, there is transformer itself
The ability of compensating direct current magnetic bias.
Embodiment 2：
In embodiment shown in Fig. 4, Fig. 5, the three-phase of first winding is respectively A phases, B phases and C phases, the neutrality of first winding
Point is N, and every phase winding of A phases, B phases and C phases is divided into two sections of parts of equal turn numbers, and wherein A phase windings are divided into winding w1With
Winding w4Two sections of windings are formed, and B phase windings are divided into winding w2With winding w5Two sections of windings are formed, C phase windings are divided into winding w3With around
Group w6Two sections of windings are formed；Wherein winding w1With winding w6, winding w2With winding w4, winding w3With winding w5Use radial same core
Arrangement, wherein with the joining winding w of neutral point4, winding w5, winding w6Using inner arrangement；Using A phases as 12 points of clock
Direction defines phase angle ZAC, winding connection Z11ACMiddle winding w1It it is 30 ° along phase shifting angle counterclockwise.
Embodiment 3：
In embodiment shown in Fig. 6, Fig. 7, the three-phase of first winding is respectively A phases, B phases and C phases, the neutrality of first winding
Point is N, and every phase winding of A phases, B phases and C phases is divided into two sections of parts of equal turn numbers, and wherein A phase windings are divided into winding w1With around
Group w4Two sections of windings are formed, and B phase windings are divided into winding w2With winding w5Two sections of windings are formed, C phase windings are divided into winding w3And winding
w6Two sections of windings are formed, wherein winding w1With winding w4, winding w2With winding w5, winding w3With winding w6Using radial same core row
Row, wherein with the joining winding w of neutral point4, winding w5, winding w6Using inner arrangement；Using A phases as the point side of clock 12
To definition phase angle ZAB, winding connection Z7ABMiddle winding w1It it is 150 ° along phase shifting angle counterclockwise.
Embodiment 4：
In embodiment shown in Fig. 8, Fig. 9, the three-phase of first winding is respectively A phases, B phases and C phases, the neutrality of first winding
Point is N, and every phase winding of A phases, B phases and C phases is divided into two sections of parts of equal turn numbers, and wherein A phase windings are by winding w1With winding w4
Two sections are connected in series composition, and B phase windings are by winding w2With winding w5Two sections are connected in series composition, C phase windings by winding w3And winding
w6Two sections are connected in series composition, wherein winding w1With winding w4, winding w2With winding w5, winding w3With winding w6Using radial same
Core arrange, wherein with the joining winding w of neutral point4, winding w5, winding w6Using inner arrangement；Using A phases as clock 12
Point direction defines phase angle ZAC, winding connection Z5ACMiddle winding w1It it is 150 ° along clockwise phase shifting angle.
Above content and structure describes the general principle, principal character and advantages of the present invention of product of the present invention, one's own profession
The technical staff of industry should be recognized that.Merely illustrating the principles of the invention described in examples detailed above and specification, this is not being departed from
On the premise of spirit and scope, various changes and modifications of the present invention are possible, and these changes and improvements belong to requirement and protected
Within the scope of the invention of shield.The scope of the present invention is defined by the appended claims and its equivalents.
Claims (6)
1. a kind of transformer for suppressing function with D.C. magnetic biasing, including iron core and winding, it is characterised in that：Winding by once,
Secondary winding forms, wherein the first winding per phase uses tortuosity attachment structure, the first winding per phase is divided into two sections
Winding is formed, and is formed and is respectively wound on different iron cores per two sections of windings of phase first winding.
2. according to the transformer with D.C. magnetic biasing suppression function described in claim 1, it is characterised in that：On per column iron core
There is the winding of the number of turn such as two sections.
3. according to the transformer with D.C. magnetic biasing suppression function described in claim 1, it is characterised in that：It is described once around
The three-phase of group is respectively A phases, B phases and C phases, and the neutral point of first winding is N, and every phase winding of A phases, B phases and C phases is divided into circle
Two sections of equal parts of number, wherein A phase windings are divided into winding w1With winding w4Two sections of windings are formed, and B phase windings are divided into winding w2With
Winding w5Two sections of windings are formed, C phase windings are divided into winding w3With winding w6Two sections of windings are formed；Wherein winding w1With winding w4, around
Group w2With winding w5, winding w3With winding w6Using radial same core arrangement, wherein with the joining winding w of neutral point4, winding
w5, winding w6Using inner arrangement；Phase angle Z is defined by 12 directions of clock of A phasesAB, winding connection Z1ABMiddle winding w1
It it is 30 ° along clockwise phase shifting angle.
4. according to the transformer with D.C. magnetic biasing suppression function described in claim 1, it is characterised in that：It is described once around
The three-phase of group is respectively A phases, B phases and C phases, and the neutral point of first winding is N, and every phase winding of A phases, B phases and C phases is divided into circle
Two sections of equal parts of number, wherein A phase windings are divided into winding w1With winding w4Two sections of windings are formed, and B phase windings are divided into winding w2With
Winding w5Two sections of windings are formed, C phase windings are divided into winding w3With winding w6Two sections of windings are formed；Wherein winding w1With winding w6, around
Group w2With winding w4, winding w3With winding w5Using radial same core arrangement, wherein with the joining winding w of neutral point4, winding
w5, winding w6Using inner arrangement；Phase angle Z is defined by 12 directions of clock of A phasesAC, winding connection Z11ACMiddle winding w1
It it is 30 ° along phase shifting angle counterclockwise.
5. according to the transformer with D.C. magnetic biasing suppression function described in claim 1, it is characterised in that：It is described once around
The three-phase of group is respectively A phases, B phases and C phases, and the neutral point of first winding is N, and every phase winding of A phases, B phases and C phases is divided into the number of turn
Two sections of equal parts, wherein A phase windings are divided into winding w1With winding w4Two sections of windings are formed, and B phase windings are divided into winding w2With around
Group w5Two sections of windings are formed, C phase windings are divided into winding w3With winding w6Two sections of windings are formed, wherein winding w1With winding w4, winding
w2With winding w5, winding w3With winding w6Using radial same core arrangement, wherein with the joining winding w of neutral point4, winding w5、
Winding w6Using inner arrangement；Phase angle Z is defined by 12 directions of clock of A phasesAB, winding connection Z7ABMiddle winding w1Edge
Phase shifting angle counterclockwise is 150 °.
6. according to the transformer with D.C. magnetic biasing suppression function described in claim 1, it is characterised in that：It is described once around
The three-phase of group is respectively A phases, B phases and C phases, and the neutral point of first winding is N, and every phase winding of A phases, B phases and C phases is divided into the number of turn
Two sections of equal parts, wherein A phase windings are by winding w1With winding w4Two sections are connected in series composition, and B phase windings are by winding w2With around
Group w5Two sections are connected in series composition, C phase windings by winding w3With winding w6Two sections are connected in series composition, wherein winding w1And winding
w4, winding w2With winding w5, winding w3With winding w6Using radial same core arrangement, wherein with the joining winding w of neutral point4、
Winding w5, winding w6Using inner arrangement；Phase angle Z is defined by 12 directions of clock of A phasesAC, winding connection Z5ACIn around
Group w1It it is 150 ° along clockwise phase shifting angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710766381.8A CN107507698A (en) | 2017-08-30 | 2017-08-30 | A kind of transformer for suppressing function with D.C. magnetic biasing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710766381.8A CN107507698A (en) | 2017-08-30 | 2017-08-30 | A kind of transformer for suppressing function with D.C. magnetic biasing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107507698A true CN107507698A (en) | 2017-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710766381.8A Pending CN107507698A (en) | 2017-08-30 | 2017-08-30 | A kind of transformer for suppressing function with D.C. magnetic biasing |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003259650A (en) * | 2002-03-05 | 2003-09-12 | Toshiba Corp | Exciting current detector of transformer and controller of self-excited converter employing it |
| CN101872969A (en) * | 2010-07-14 | 2010-10-27 | 吉林省电力有限公司电力科学研究院 | Capacitive grounding current distributed compensation method and device for medium-voltage power supply system |
| CN201812647U (en) * | 2010-08-12 | 2011-04-27 | 潍坊五洲浩特电气有限公司 | Dry type grounding transformer |
| CN201820605U (en) * | 2010-07-14 | 2011-05-04 | 吉林省电力有限公司电力科学研究院 | Disperse-compensation capacitance-current transformer for medium voltage system |
| CN202008919U (en) * | 2011-03-18 | 2011-10-12 | 杭州得诚电力科技有限公司 | Zigzag transformer for low-voltage distribution network |
| CN106558406A (en) * | 2016-10-10 | 2017-04-05 | 中国电力科学研究院 | A kind of suppressing method of power transformer D.C. magnetic biasing |
| CN207134215U (en) * | 2017-08-30 | 2018-03-23 | 杭州钱江电气集团股份有限公司 | A kind of transformer for suppressing function with D.C. magnetic biasing |
-
2017
- 2017-08-30 CN CN201710766381.8A patent/CN107507698A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003259650A (en) * | 2002-03-05 | 2003-09-12 | Toshiba Corp | Exciting current detector of transformer and controller of self-excited converter employing it |
| CN101872969A (en) * | 2010-07-14 | 2010-10-27 | 吉林省电力有限公司电力科学研究院 | Capacitive grounding current distributed compensation method and device for medium-voltage power supply system |
| CN201820605U (en) * | 2010-07-14 | 2011-05-04 | 吉林省电力有限公司电力科学研究院 | Disperse-compensation capacitance-current transformer for medium voltage system |
| CN201812647U (en) * | 2010-08-12 | 2011-04-27 | 潍坊五洲浩特电气有限公司 | Dry type grounding transformer |
| CN202008919U (en) * | 2011-03-18 | 2011-10-12 | 杭州得诚电力科技有限公司 | Zigzag transformer for low-voltage distribution network |
| CN106558406A (en) * | 2016-10-10 | 2017-04-05 | 中国电力科学研究院 | A kind of suppressing method of power transformer D.C. magnetic biasing |
| CN207134215U (en) * | 2017-08-30 | 2018-03-23 | 杭州钱江电气集团股份有限公司 | A kind of transformer for suppressing function with D.C. magnetic biasing |
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