EP2088603A2 - Réacteur à dérivation - Google Patents
Réacteur à dérivation Download PDFInfo
- Publication number
- EP2088603A2 EP2088603A2 EP09152300A EP09152300A EP2088603A2 EP 2088603 A2 EP2088603 A2 EP 2088603A2 EP 09152300 A EP09152300 A EP 09152300A EP 09152300 A EP09152300 A EP 09152300A EP 2088603 A2 EP2088603 A2 EP 2088603A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- leg
- flux return
- phase
- shunt reactor
- air
- 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.)
- Granted
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
- H01F3/12—Magnetic shunt paths
-
- 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
- H01F29/08—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators
- H01F29/10—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators having movable part of magnetic circuit
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
- H01F3/14—Constrictions; Gaps, e.g. air-gaps
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F37/00—Fixed inductances not covered by group H01F17/00
Definitions
- the invention is related to three-phase reactors and more particularly to iron-core type shunt reactors.
- An iron core shunt reactor with an air-gap in each phase leg is one typical reactor type to be used for compensating the three-phase capacitive reactive power and reducing the earth fault current in electric power transmission or distribution networks.
- a compact structure, light weight and low losses can be achieved by using this iron-core reactor type.
- the zero impedance Z 0 typically is about 30% of the positive sequence impedance Z 1 , so in other words the ratio Z 0 : Z 1 ⁇ 0,3. Because the leakage flux is strongly heating the wall of the tank, the network shall be disconnected immediately in a case of earth fault.
- the zero impedance Z 0 for those types is about equal to the positive sequence impedance Z 1 , so in other words the ratio Z 0 : Z 1 ⁇ 1.
- the flux return leg is a path for the flux caused by the homopolar flux, enabling to continue running the power network in a case of earth fault. In some cases a problem is the potential over-compensation of the earth fault current.
- the values of the ratio Z 0 : Z 1 between 0.3 and 1 might be needed to run the network during earth fault but still not overcompensating the network.
- the object of the invention is to provide a shunt reactor such that the above-mentioned problem can be solved. This is achieved by a reactor which is characterized in what is disclosed in the independent claim 1.
- the preferred embodiments of the invention are disclosed in the dependent claims.
- the invention is a three-phase iron-core type shunt reactor with a four or a five leg core where all three phase legs are equipped with one or plurality of air-gaps but the flux return-leg or flux return-legs are equipped with at least one air-gap, as well.
- the cross-sectional area of the flux return leg in a four leg arrangement is preferably the same as for the three phase legs. In a five leg arrangement, the cross-sectional area of the flux return legs could be half of that.
- the air-gap should be about equal on both sides to ensure a linear functionality in function of earth fault current.
- a leg consisting of an iron core with an air-gap could be formed by laminating a plurality of block iron cores having at least one pure air-gap or air-gap filled by a non-magnetic material.
- An air-gap of the flux return leg could be fixed, but in another embodiment it could be adjustable.
- the flux return leg could be equipped with an arrangement to move one part of the leg with reference to another part of the flux return leg to adjust the path for homopolar flux.
- the ratio Z o : Z 1 could even be continuously adjusted by an automatic control arrangement.
- a shunt reactor is typically directly earthed, but the range of ratio Z o : Z 1 could be expanded by connecting an additional one-phase zero-point coil, called a neutral earthing reactor between the star point of the shunt reactor windings and the earth.
- the values for ratio Z o : Z 1 up to more than 1 could be achieved. If the reactor has no star point connection to the earth or is delta connected, the Z o has an infinite value.
- Fig. 1 shows a three-phase shunt reactor according to the invention.
- the core (1) of the reactor is typically oil-immersed in a tank (2).
- the shunt reactor comprises an upper yoke (3) and a lower yoke (4), one phase leg (5) for each phase, a winding (6) wound surrounding each phase leg and a flux return leg (8).
- Each phase leg is equipped with an air-gap (7).
- the flux return leg (8) is equipped with at least one air-gap (11), as well.
- the length of the air-gaps (7,10) could roughly be calculated by the common formulas for magnetic circuits having air and iron portions.
- the flux return leg (8) should be constructed to carry the mechanical forces like what is commonly known from the designs of phase legs (5) for typical shunt reactor with air-gaps (7).
- the air-gap (7, 10) could be filled by non-magnetic material to keep more easily the length fixed against to mechanical forces.
- the first end of each winding (6) is connected to a bushing insulator (not shown) on the top of the tank (2).
- Another ends of the windings could be internally star-coupled and the star-point connected to a bushing insulator or a particular earthing terminal to offer one connection point to the earth.
- the another end of each winding could be connected to a corresponding bush insulator to be star-coupled outside of the tank.
- Fig. 2 shows another embodiment of a three-phase shunt reactor with two flux return legs (8).
- the cross-section area of the flux return legs could be half of that on phase legs.
- the dimensions, like the length of the air-gap (10) of both flux return legs should be essentially equal to ensure linear functionality of the shunt reactor as a function of earth fault current.
- Fig. 3 shows a principle main circuit drawing of the shunt reactor.
- the first end of each winding (6) is connected to corresponding phase of the three phase transmission or distribution line by a circuit breaker or disconnector.
- the shunt reactor could be connected to the substation bus bar, as well.
- the second ends of each winding are star connected and the star connection point is directly connected to the earth.
- Fig. 4 shows a principle main circuit drawing of another embodiment of the shunt reactor.
- the first end of each winding is connected to corresponding phase of the three phase transmission or distribution line.
- the second ends of the winding are star connected and the star connection point is connected by a one-phase zero-point coil (12) to the earth.
- the zero-point coil (12) could be fixed or adjustable.
- Fig. 5 shows an embodiment of a three-phase shunt reactor.
- the flux return leg (8) is equipped with an arrangement to adjust the length of the air-gap (10).
- the lower portion (10) of the flux return leg is fixed and magnetically connected to the lower yoke (4).
- the upper portion (13) of the flux return leg is moveable arranged and magnetically connected to the upper yoke (3).
- Fig. 6 shows another embodiment of a three-phase shunt reactor.
- the flux return leg (8) is equipped with an arrangement to adjust the magnetic circuit.
- a moveable portion (14) is arranged between the fixed upper portion (9) and the fixed lower portion (10) of the flux return leg.
- the magnetic circuit through the return path is adjustable by moving the moveable portion (14) transversely related to the fixed portions (9,10).
- the ratio Z o : Z 1 could be continuously adjusted from about 0,3 (open) to 1 (closed).
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Emergency Protection Circuit Devices (AREA)
- Control Of Electrical Variables (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20080085A FI20080085L (fi) | 2008-02-06 | 2008-02-06 | Rinnakkaiskuristin |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP2088603A2 true EP2088603A2 (fr) | 2009-08-12 |
| EP2088603A3 EP2088603A3 (fr) | 2014-06-25 |
| EP2088603B1 EP2088603B1 (fr) | 2017-10-25 |
Family
ID=39148865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09152300.1A Active EP2088603B1 (fr) | 2008-02-06 | 2009-02-06 | Réacteur à dérivation |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP2088603B1 (fr) |
| FI (1) | FI20080085L (fr) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5306562B1 (ja) * | 2012-11-08 | 2013-10-02 | 三菱電機株式会社 | ノイズフィルタ |
| CN104282412A (zh) * | 2014-10-28 | 2015-01-14 | 田村（中国）企业管理有限公司 | 磁集成电感器 |
| CN104882253A (zh) * | 2015-04-24 | 2015-09-02 | 上海意兰可电力电子设备有限公司 | 三相四柱共轭电抗器 |
| CN106057402A (zh) * | 2016-08-09 | 2016-10-26 | 华为技术有限公司 | 磁集成电感及磁集成电路 |
| EP3136405A4 (fr) * | 2014-05-27 | 2017-05-10 | Huawei Technologies Co., Ltd. | Inductance de couplage et convertisseur de puissance |
| WO2017182544A1 (fr) | 2016-04-20 | 2017-10-26 | Wobben Properties Gmbh | Bobine d'inductance à courant triphasé |
| CN109326420A (zh) * | 2018-11-15 | 2019-02-12 | 山西中磁尚善科技有限公司 | 三相电抗器的电感平衡磁芯及三相电抗器 |
| EP3591674A1 (fr) * | 2018-07-06 | 2020-01-08 | Rolls-Royce plc | Dispositif de commande de courant |
| US10930423B1 (en) * | 2017-07-05 | 2021-02-23 | Universal Lighting Technologies, Inc. | Single magnetic assembly combining three independent magnetics using a modified “E” core with four winding windows |
| US20220102068A1 (en) * | 2019-02-04 | 2022-03-31 | Ensto Oy | Arc suppression coil and method for grounding |
| EP4089696A1 (fr) * | 2021-04-15 | 2022-11-16 | TenneT TSO GmbH | Bobine électrique agencée dans un champ électromagnétique alternatif permettant de générer du courant destiné à un usage propre |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB509050A (en) * | 1937-12-10 | 1939-07-10 | Gen Electric Co Ltd | Improvements in and relating to electrical reactors |
| JPS57112007A (en) * | 1980-12-29 | 1982-07-12 | Fuji Electric Co Ltd | Three-phase and seven-leg core type reactor |
| DE3305708A1 (de) * | 1983-02-18 | 1984-08-23 | Transformatoren Union Ag, 7000 Stuttgart | Drehstromdrosselspule mit fuenfschenkelkern |
| JPH02203507A (ja) * | 1989-02-01 | 1990-08-13 | Fuji Electric Co Ltd | 三相分路リアクトル鉄心 |
-
2008
- 2008-02-06 FI FI20080085A patent/FI20080085L/fi not_active Application Discontinuation
-
2009
- 2009-02-06 EP EP09152300.1A patent/EP2088603B1/fr active Active
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8810335B2 (en) | 2012-11-08 | 2014-08-19 | Mitsubishi Electric Corporation | Noise filter |
| JP5306562B1 (ja) * | 2012-11-08 | 2013-10-02 | 三菱電機株式会社 | ノイズフィルタ |
| EP3136405A4 (fr) * | 2014-05-27 | 2017-05-10 | Huawei Technologies Co., Ltd. | Inductance de couplage et convertisseur de puissance |
| CN104282412A (zh) * | 2014-10-28 | 2015-01-14 | 田村（中国）企业管理有限公司 | 磁集成电感器 |
| CN104882253A (zh) * | 2015-04-24 | 2015-09-02 | 上海意兰可电力电子设备有限公司 | 三相四柱共轭电抗器 |
| WO2017182544A1 (fr) | 2016-04-20 | 2017-10-26 | Wobben Properties Gmbh | Bobine d'inductance à courant triphasé |
| DE102016107295A1 (de) * | 2016-04-20 | 2017-10-26 | Wobben Properties Gmbh | Drehstromdrosselspule |
| CN106057402A (zh) * | 2016-08-09 | 2016-10-26 | 华为技术有限公司 | 磁集成电感及磁集成电路 |
| US10930423B1 (en) * | 2017-07-05 | 2021-02-23 | Universal Lighting Technologies, Inc. | Single magnetic assembly combining three independent magnetics using a modified “E” core with four winding windows |
| EP3591674A1 (fr) * | 2018-07-06 | 2020-01-08 | Rolls-Royce plc | Dispositif de commande de courant |
| US10971927B2 (en) | 2018-07-06 | 2021-04-06 | Rolls-Royce Plc | Current controlling device |
| CN109326420A (zh) * | 2018-11-15 | 2019-02-12 | 山西中磁尚善科技有限公司 | 三相电抗器的电感平衡磁芯及三相电抗器 |
| CN109326420B (zh) * | 2018-11-15 | 2023-12-26 | 山西中磁尚善科技有限公司 | 三相电抗器的电感平衡磁芯及三相电抗器 |
| US20220102068A1 (en) * | 2019-02-04 | 2022-03-31 | Ensto Oy | Arc suppression coil and method for grounding |
| EP4089696A1 (fr) * | 2021-04-15 | 2022-11-16 | TenneT TSO GmbH | Bobine électrique agencée dans un champ électromagnétique alternatif permettant de générer du courant destiné à un usage propre |
Also Published As
| Publication number | Publication date |
|---|---|
| FI20080085A0 (fi) | 2008-02-06 |
| FI20080085A7 (fi) | 2009-08-07 |
| EP2088603A3 (fr) | 2014-06-25 |
| EP2088603B1 (fr) | 2017-10-25 |
| FI20080085L (fi) | 2009-08-07 |
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