EP1131829A1 - Commande de flux commutable pour dispositifs electromagnetiques statiques haute puissance - Google Patents
Commande de flux commutable pour dispositifs electromagnetiques statiques haute puissanceInfo
- Publication number
- EP1131829A1 EP1131829A1 EP98950250A EP98950250A EP1131829A1 EP 1131829 A1 EP1131829 A1 EP 1131829A1 EP 98950250 A EP98950250 A EP 98950250A EP 98950250 A EP98950250 A EP 98950250A EP 1131829 A1 EP1131829 A1 EP 1131829A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flux
- winding
- regulation
- flux path
- main
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/14—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias
Definitions
- the present invention relates to a selectively controllable high power static
- power devices include those having a rated power ranging from a few hundred kVA up to
- devices is to allow exchange or control of electric energy in and between two or more electric
- windings often include taps making it possible to supply different voltage levels from the
- the invention provides a high power static electromagnetic or induction device with a
- rated power ranging from a few hundred kVA up to over 1000 MVA with a rated voltage
- the invention is based on the discovery that selective switchable control of the flux
- the control may be in the form of a switchable
- At least one of the windings is formed of one or
- the cover comprises a solid insulation
- the electric conductor is located within the inner layer. As a result the electric field is confined within the winding.
- the electric conductor according to
- the device has a flux
- the flux may be selectively admitted or
- regulation may be in discrete steps corresponding to discrete or selective
- the invention employs windings having semiconducting layers which exhibit similar characteristics
- the outer semiconducting layer exhibits such electrical properties that
- the semiconducting layer does not,
- the inner semiconducting layer exhibits sufficient electrical conductivity in order for
- the inner layer has such properties
- the layer may, as such, be formed with a varying thickness but to ensure an even
- the inner layer does not exhibit such a great conductivity that it contributes to induce voltages.
- the inner semiconducting layer for the inner semiconducting layer,
- a transformer according to the invention operates as a
- Such a transformer is capable of limiting
- the transformer is also
- the present invention allows for a flexible AC transmission system with control of
- the components wherein the power flow can be controlled.
- the components wherein the power flow can be controlled.
- the invention allows for dual use without significant
- a reactor may be switchably
- control equipment is generally low voltage equipment and thus, simpler
- the arrangement also avoids the problem of harmonics generation.
- the reactor can perform fast variable reactive power compensation.
- the reactor is capable of performing power flow control by redistribution of active or reactive effect between lines.
- the reactor can limit short circuit currents, provide
- the magnetic circuit of the regulator includes at
- At least one regulation leg having a flux bearing region switchable between open and closed
- regulation winding being connected to the main winding. It is also possible to place at least
- Fig. 1 shows the electric field distribution around a winding of a conventional
- inductive device such as a power transformer or reactor
- Fig. 2 shows an embodiment of a winding in the form of a cable in a high power
- Fig. 3 shows an embodiment of a power transformer according to the invention
- Fig. 3A illustrates a magnetic switch in accordance with the invention
- Fig. 3B shows an open and closed flux path corresponding to open and closed magnetic switches
- Fig. 4 is a schematic illustration of a regulation leg portion of the transformer of Fig.
- Fig. 5 is a schematic illustration of a reactor in accordance with the present invention.
- Figs. 6A and 6B are respective, perspective and sectional schematic illustrations of a
- Figs. 7A and 7B are respective, perspective and sectional schematic illustrations of a
- FIGs. 8 A and 8B are respective, perspective and sectional schematic illustrations of a device in accordance with yet another embodiment of the invention.
- Fig. 9 is a schematic illustration of a three phase transformer according to the
- the devices herein categorized may be designed as single-phase and three-phase
- devices have one or more windings (per phase) and may be designed
- the invention further relates more specifically to a controllable inductance wherein the magnetic flux is selectively redistributed among and between different flux paths by
- the invention operates as a
- Fig. 1 shows a simplified and fundamental view of the electric field distribution
- transformer/reactor 1 including a winding 2 and a core 3.
- Equipotential lines 4 show where
- the electric field has the same magnitude.
- the lower part of the winding is assumed to be at
- the core 3 has a window 4.
- the potential distribution determines the composition of the insulation system since it
- Fig. 2 shows an example of an exemplary cable 5 which may be used in windings
- 5 comprises at least one conductor 6 including a number of strands 6A with a covering 7
- the covering includes an inner semiconducting layer 8 disposed
- the cable 5 may be provided with other additional layers for
- Fig. 3 shows a high power inductive device in the form of a single phase core type
- the transformer 11 in accordance with the present invention.
- the transformer 11 comprises a
- core 12 which is formed with main or outer legs 14,16 and short or inner legs 18 and 20, and
- the core 12 may be made of
- laminated iron sheets having a main or large aperture or window 28 and a plurality of small or
- a primary winding 34 is wrapped around the
- a secondary winding 36 may be wrapped concentrically with the
- a regulation winding 37 formed of
- rings 40-1, 40-2 and 40-3 surround the middle arm
- rings 40-4, 40-5 and 40-n surround the upper arm 26 in the windows 30-1, 30-2 and
- ring 40 comprises one or
- switch 44 More turns of a conductor 42, e.g. copper terminated such as switch 44.
- control may
- the windings 34, 36 and 38 produce the flux ⁇ , which is carried by the core 12 along
- Fig. 4 is a fragmentary portion of the regulation region 32 of the transformer 11
- transformer 11 has the low voltage (LV) winding 34 (N LV turns), the high voltage (HV)
- N HV / ⁇ LV +N R transformer ratio N HV / ⁇ LV +N R ), where N R is an effective number of regulation turns. N R can
- the linking is performed with an
- switchable magnetic rings 40 in the core 12, each of which should as completely as possible exclude the flux from a selected region of the core, or admit the flux
- flux control occurs in a number of ways, each representing a single
- the regulation region 32 is dimensioned for maximum flux
- the regulation region 32 is at least twice the size of a
- a reactor 60 is shown in Fig.
- the reactor 60 has a main flux path 62 and a regulating flux path 64.
- a main winding 66 is a main winding 66
- magnetic contact switch 70 is in the regulating path 64 as shown. When closed, the magnetic
- An additional winding 72 and a magnetic switch 74 may be added to the main
- Figs. 6A - 6B; 7A - 7B; and 8A - 8B illustrate the regulation portion 70 of a transformer, reactor or regulator, as the case may be, depending on the application.
- Figs. 6 A - 6B illustrate a 1 :2:4 arrangement.
- the winding 72 in the form of a cable
- Fig. 2 is wound around a common axis A ppl parallel to the direction of the
- the number of switches 40 required is 2m, where m is the number of
- FIGS. 2 A, 6 A - 6B show sixteen
- Figs. 7A - 7B illustrate a 1 :3:9 arrangement.
- the cable is wound around alternate legs 90-1..., 90-n with axes AP, perpendicular to the main magnetic flux direction. Every second
- leg 50-2..., 50-(N-l) is left unwound as a bridge between the upper and the lower horizontal
- Switches 40-1A, 40-1B..., 40-NA, 40-NB are positioned on the sides of each leg
- Figs. 8A - 8B illustrate a 1 :3:7 arrangement.
- the cable is wound around legs 94-1...
- Switches 40-1 A, 40-1B..., 40-NA, 40-NB are
- each leg positioned on the sides of each leg so that the flux may be linked past or in both directions
- sub-coil 5 74-1..., 74-n with the restriction than in a sequence of incorporated coils
- Figs. 8A - 8B show an example with fifteen
- variable impedances of various kinds may be used. For example, a step function like flux response, variable impedances of various kinds may be used.
- variable or high resistance is used as a load for the ring 40, a variable or high flux distribution
- loading or activation may be provided by an active element, for
- an active filter for example, an active filter. Such a filter could be programmable.
- variable power source e.g., a voltage or current source
- Fig. 9 illustrates another embodiment of the invention wherein a three phase
- a one or more magnetic switches 120 may be employed as hereinabove described.
- switches 120 are located in yokes 114 and 116 to control the flux through the regulation windings 104.
- the windings may be in series or shunt
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
L'invention porte sur un dispositif électromagnétique statique haute puissance qui comprend un chemin de flux, un enroulement principal et un ou plusieurs enroulements de régulation entourant des parties du chemin de flux. Un dispositif de commande est couplé au chemin de flux pour y laisser sélectivement entrer le flux. Dans une forme de réalisation exemplaire, plusieurs chemins de flux sont sélectivement mis sous tension ou hors tension pour associer les enroulements de régulation au circuit ou les dissocier du circuit. Les enroulements peuvent être formés d'un câble isolant de confinement du champ électrique magnétiquement perméable.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IB1998/001777 WO2000019459A1 (fr) | 1998-09-29 | 1998-09-29 | Commande de flux commutable pour dispositifs electromagnetiques statiques haute puissance |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1131829A1 true EP1131829A1 (fr) | 2001-09-12 |
Family
ID=11004774
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98950250A Withdrawn EP1131829A1 (fr) | 1998-09-29 | 1998-09-29 | Commande de flux commutable pour dispositifs electromagnetiques statiques haute puissance |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1131829A1 (fr) |
JP (1) | JP2002526912A (fr) |
CN (1) | CN1327601A (fr) |
AU (1) | AU9640198A (fr) |
WO (1) | WO2000019459A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4953302B2 (ja) * | 2007-02-28 | 2012-06-13 | 学校法人日本大学 | 交流リアクトル |
CN101789304A (zh) * | 2010-03-22 | 2010-07-28 | 福州大学 | 具有永磁偏磁的磁性元件 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR864380A (fr) * | 1939-12-01 | 1941-04-25 | Entpr Chemin | Perfectionnements aux treuils à vapeur pour le battage des pilotis et analogues |
GB540456A (en) * | 1940-04-17 | 1941-10-17 | Austin Walters & Son Ltd | Improvements in or relating to self-regulating electric transformers |
US2780771A (en) * | 1953-04-21 | 1957-02-05 | Vickers Inc | Magnetic amplifier |
US3372283A (en) * | 1965-02-15 | 1968-03-05 | Ampex | Attenuation control device |
US3365657A (en) * | 1966-03-04 | 1968-01-23 | Nasa Usa | Power supply |
US4994952A (en) * | 1988-02-10 | 1991-02-19 | Electronics Research Group, Inc. | Low-noise switching power supply having variable reluctance transformer |
-
1998
- 1998-09-29 JP JP2000572870A patent/JP2002526912A/ja active Pending
- 1998-09-29 EP EP98950250A patent/EP1131829A1/fr not_active Withdrawn
- 1998-09-29 CN CN98814339.9A patent/CN1327601A/zh active Pending
- 1998-09-29 WO PCT/IB1998/001777 patent/WO2000019459A1/fr not_active Application Discontinuation
- 1998-09-29 AU AU96401/98A patent/AU9640198A/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO0019459A1 * |
Also Published As
Publication number | Publication date |
---|---|
AU9640198A (en) | 2000-04-17 |
WO2000019459A1 (fr) | 2000-04-06 |
CN1327601A (zh) | 2001-12-19 |
JP2002526912A (ja) | 2002-08-20 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20010417 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
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DAX | Request for extension of the european patent (deleted) | ||
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20040401 |