EP2560174A1 - Dreiphasenstromreaktor mit magnetischer vorspannung - Google Patents

Dreiphasenstromreaktor mit magnetischer vorspannung Download PDF

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Publication number
EP2560174A1
EP2560174A1 EP10849930A EP10849930A EP2560174A1 EP 2560174 A1 EP2560174 A1 EP 2560174A1 EP 10849930 A EP10849930 A EP 10849930A EP 10849930 A EP10849930 A EP 10849930A EP 2560174 A1 EP2560174 A1 EP 2560174A1
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EP
European Patent Office
Prior art keywords
sections
yoke
section
yokes
reactor
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EP10849930A
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English (en)
French (fr)
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EP2560174A4 (de
Inventor
Alexander Mikhailovich Bryantsev
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    • 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
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/346—Preventing or reducing leakage fields
    • 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
    • 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

Definitions

  • the invention is related to the electrical engineering field and may be used for controllable magnetizing reactors installed for example in a power network to compensate for reactive power, stabilize the voltage, for parallel operation with capacitor banks, to increase the capacity, etc.
  • the electrical three-phase magnetizing reactor contains the laminated core with three upper and three lower coaxial rods, with upper, lower, medium and two side yokes, the horizontal yokes have two medium and two extreme sections. Windings located on each rod consist of two parts.
  • the reactor lead-ins are connected to winding parts and to converters with the control system.
  • Installed in the reactor are four magnetic shunts as rectangular frames with horizontal and vertical parts, the horizontal parts of the shunts are located on the winding butt ends along the upper, medium and lower yokes, and their closing vertical parts are located along the side yokes.
  • the disadvantage of this prototype device is also increased consumption of the magnet core steel due to increased magnetic flow in it (from the stray magnetic field) in the reactor load modes, as well as due to non-optimal design and the magnet core and shunt parameters. Besides the reactor power adjustment range is limited and the reliability is reduced due to danger of appearance of high voltage on the control system due to the galvanic coupling with the reactor windings. In emergency cases.
  • the purpose of the invention is the reduction in steel consumption and losses, increase of the reliability, increase of functional abilities of the reactor - expansion of power adjustment range due to introduction of new elements to the design and electric circuitry, new couplings between elements, ,optimization of ratios of parameters.
  • the magnetic structure of the electrical three-phase reactor which is made of restored electric steel sheets and contains the magnet core with coaxially arranged three upper and three lower vertical rods, which house two-sectional windings, upper, lower and middle horizontal and two side vertical yokes, the horizontal yokes have two middle and two extreme sections, four magnetic shunts as rectangular frames with horizontal and vertical sections, , the horizontal sections of the shunts are located on the winding butt ends along the upper, middle and lower yokes, and their closing vertical sections are located along the side yokes.
  • the reactor contains also the controllable semi-conductive converters from diodes and resistors and the control system, the above-mentioned windings are connected to the three-phase network and with converters. Entered into the reactor are three-winding insulating transformers installed between converters and control system. The nonmagnetic gaps are made on sections of the middle horizontal yoke of the magnet core. Each magnetic shunt has two additional vertical sections located between the windings.
  • the ratio of nonmagnetic gap values of the magnet core in the extreme sections of middle yoke ⁇ extreme and nonmagnetic gap values in the middle sections of middle yoke ⁇ middle ( ⁇ middle / ⁇ extreme ) is as follows 1.5 ⁇ ⁇ middle / ⁇ extreme ⁇ 3.
  • Yoke and rod cross section S is within 0.9 ⁇ S middle yoke / S ⁇ 1.3
  • ratio between the steel cross section of all other sections of yokes S yoke and rod cross section S is within 0.7 ⁇ S yoke / S ⁇ 0.9
  • ratio between the steel cross section of all parts of magnetic shunts S shunt and rod cross section S is within 0.07 ⁇ S shunt / S ⁇ 0.3.
  • Fig. 1 presents the reactor removable part (magnetic structure with windings) - front view
  • Fig. 2 - the same, top view
  • Fig. 3 presents the same, side view
  • Fig. 4 presents the main magnet core assembled of restored electric steel sheets
  • Fig. 5 presents one of four magnetic shunts assembled of restored electric steel sheets as a rectangular three-window frame
  • Fig. 6 presents the reactor electrical circuitry.
  • the reactor magnetic structure restored of electric steel sheets consists of the main magnet core and four magnetic shunts.
  • the reactor magnet core ( Figs 1-4 ) contains six coaxial rods - three upper ones 1, 2,3 and three lower ones 4, 5, 6. Each rod houses the winding, consisting of two sections 7 and 8. There are two side vertical yokes 9 and 10, as well as three horizontal yokes - upper yoke 11, lower yoke 12 and middle yoke 13.
  • the rod steel cross section - S steel cross section of all yokes except middle yoke - S yoke, steel cross section of the middle yoke - S mid yoke.
  • Each horizontal yoke 11, 12 and 13 has four sections: two extreme and two middle ones.
  • middle horizontal yoke 13 All sections of middle horizontal yoke 13 have nonmagnetic gaps 14 (gap value in middle sections ⁇ middle ) and 15 (gap value in extreme sections ⁇ extreme. ).
  • Each of four magnetic shunts 16 is made as a rectangular three-window frame ( Fig. 5 ).
  • the shunt horizontal parts are arranged on the winding butt ends (between winding butt ends 7 and 8 and pressing beam 17, Fig. 3 ).
  • Shunts 16 have two middle vertical parts 18 located between the windings. All parts of magnetic shunts have steel cross section S shunt.
  • the reactor circuitry ( Fig. 6 ) contains three phase lead-ins A, B and C.
  • Two winding sections 7 and 8 on upper rod 1 of phase A taps A1-A2 and A3-A4, on lower coaxial rod 4 - taps A5-A6 and A7-A8 .
  • Two winding sections on upper rod 2 of phase B have taps B1-B2 and B3-B4, on lower coaxial rod 5 - B5-B6 and B7-B8.
  • Two winding sections on upper rod 3 of phase C have taps C1-C2 and C3-C4, on lower coaxial rod 6 - C5-C6 and C7-C8.
  • the windings are joined as two triangles and are connected to three phase lead-ins A, B and C.
  • a converter consisting of parallel-connected diode D and resistor R, is cut in between two winding sections of each rod: converter ⁇ 1A is cut in between taps A2 and A3; converter ⁇ 2A between taps A6 and A7, converter ⁇ 1B between taps B2 and B3, converter ⁇ 2B between taps B6 and B7, converter ⁇ 1C between taps C2 and C3, converter ⁇ 2C - between taps C6 and C7.
  • the converter terminals are designated in same way as the taps of the winding parts, to which they are connected. In all 6 converters diodes D and resistors R are the same.
  • Each primary tapped transformer winding is connected with its lead-ins (Y 1A -Y 2A , Y 1B -Y 2B Y 1C -Y 2C ) to the CS.
  • Each of two secondary windings is connected to the control winding section taps and to the converter terminals.
  • One secondary winding of transformer T A is connected to taps A2 and A6 and simultaneously to terminals of converters A2 and A6; the other one - taps A3 and A7 and simultaneously to terminals of converters A3 and A7.
  • One secondary winding of transformer T B is connected to taps B2 and B6 and to terminals B2 and B6, the other one to taps B3 and B7 and terminals B3 and B7.
  • One secondary winding of transformer T C is connected to taps C2 and C6 and to terminals C2 and C6, the other one to taps C3 and C7 and terminals C3 and C7.
  • Converters and insulating transformers are located on assembly panel 19 secured on the removable part ( Fig. 2 ).
  • the removable part is the reactor magnetic structure (magnet core and shunts) with windings and structural components of the press fitting - located in the oil tank.
  • the reactor is connected to the three-phase network by its lead-ins A, B and C, the network voltage is supplied to the reactor windings.
  • the control system CS provides for minimum resistance at outputs Y 1A -Y 2A , Y 1B -Y 2B Y 1C -Y 2C .
  • insulating transformers T A , T B and T C are in this case in the short circuit mode and their dissipation resistance is low, the taps of winding sections A2 and A3, A6 and A7, B2 and B3 , B6 and B7, C2 and C3, C6 and C7 are practically short-circuited in pairs.
  • each converter ⁇ 1A and ⁇ 2A , ⁇ 1B and ⁇ 2B , ⁇ 1C and ⁇ 2C is practically short-circuited and there is no rod magnetizing of the magnet core.
  • control system CS When control system CS connects the maximum resistance to taps Y 1A -Y 2A , Y 1B - Y 2B and Y 1C -Y 2C , the reactor is transferred to the maximum power mode - rod full period saturation mode. It happens due to the fact that diodes D of converters ⁇ 1A , ⁇ 2A , ⁇ 1B , ⁇ 2B , ⁇ 1C and ⁇ 2C are connected to the taps of winding sections A2 and A3, A6 and A 7, B2 and B3 , B6 and B7, C2 and C3, C6 and C7.
  • the intermediate modes from the idle mode to the maximum power mode are provided by control system CS according to the preset program, for example, for network voltage stabilization, or during the manual adjustment.
  • the nominal power mode is preset as a rule for one intermediate modes - half-period saturation reactor mode. In this mode the steel of each reactor rod is in the saturated state for half period.. Typical for such mode are not only minimum (theoretically zero) reactor distortion currents with high harmonics, but also optimum expenditure of active materials and optimum losses in the windings.
  • Insulating transformers providing for absence of galvanic coupling and increased safety of the personal and low-voltage equipment against possible appearance of the high voltage of the network (for example in emergency situations), are installed between the CS (it is located on the control console in a room) and converters. Converters together with the insulating transformers are located on panel 19 in the reactor tank located on the open site of the substation.
  • Nonmagnetic gaps !4 and 15 are made on the sections of the middle horizontal yoke 13 of the magnet core. These gaps are required to extend the reactor power adjustment ranges. Nonmagnetic gap value should be minimum, which is selected during designing from the technological potentialities of the production and usually makes up fractions or units of mm.
  • the nonmagnetic gap value in extreme sections of middle yoke ⁇ extreme should be less than the nonmagnetic gap value in middle sections of this yoke ⁇ middle in (1.5-3) times, it means: 1.5 ⁇ ⁇ middle / ⁇ extreme ⁇ 3.
  • the upper boundary should not exceed , otherwise the magnetic dispersion flow in extreme vertical parts of the shunt will be reduced and in the middle ones will be increased.
  • the lower boundary should be also observed, otherwise the magnetic dispersion flow will be increased in extreme parts of the shunt, in the middle vertical parts of the shunt will be reduced.
  • the selection of the steel cross section of all sections of the magnet core is important.
  • the ratio between the steel cross section of middle yoke S middle yoke and cross section of rods S should be selected within: 0. , 9 ⁇ S middle yoke / S ⁇ 1.3.
  • the ratio between the steel cross section of all sections of yokes S yoke and rod cross section S should be selected within: 0.7 ⁇ S yoke / S ⁇ 0.9.
  • the reactor will be with increased steel consumption in yokes. If the steel cross section of the yoke is less than the minimum value, the steel saturation appears in the reactor yokes in its definite operating modes. It results in unfavorable phenomena - increase of additional losses for eddy currents in structural components, increase in non-linear distortions in the reactor current.
  • Magnetic shunts 16 effectively channels the magnetic dispersion flow, which appears when the current flows in windings, i.e. during all modes when rods are magnetized.
  • the magnetic dispersion flow circulates in the axial direction inside the windings and is closed in magnetic system yokes and along the magnetic shunts. If magnetic shunts 16 are absent, the magnetic flow gets closed on the structural components and in the tank wall, causing the eddy currents, additional losses and impermissible heating in them.
  • For effective closing of the magnetic flow provision is made in shunts for middle longitudinal vertical sections 18 located between the windings. These two additional (as compared with the prototype) vertical sections are required for optimum distribution of the magnetic dispersion flows and reduction of the total steel consumption in shunts and the magnet core.
  • the steel cross section of magnetic shunts shall be the higher the radial size of the windings is higher, as during the reactor load the increased magnetic dispersion flow appears (as compared to the magnetic flow in rods and yokes of the magnet core in the idle mode).
  • the ratio between the steel cross section of all parts of each magnetic shunt S shunt and rod cross section S should be selected within: 0.07 ⁇ S shunt / S ⁇ 0.3.
  • the steel cross section of magnetic shunts is selected higher than the maximum value of the preset ratio, there is steel overconsumption. If the steel cross section of shunts is less than the minimum value, the shunts become of low efficiency and do not screen the dispersion flow of the windings. It results in unfavorable phenomena - increase of magnetic induction in the magnet core, main losses in the steel and additional losses in structural components.
  • the suggested three-window design of shunts improved as compared to the prototype provides for the optimum distribution of the magnetic flows of the reactor and thus optimum steel consumption in the magnetic system.
  • the high-voltage reactor is usually made with oil cooling.
  • the removable part is the magnetic system of the reactor (magnet core and shunts) with windings and structural components of the press fitting is located in the tank with oil, while the reactor lead-ins - on the tank cover. Converters and insulating transformers are located in the same tank on the assembly panel secured on the removable part.
  • the operating capacity of the suggested reactor and its high technical and economical indicators are approved by calculations, physical modeling, test results of prototypes of similar designs.
  • the steel consumption is reduced, losses are reduced, reliability and labor costs are increased, overall dimensions and mass are reduced. It is scheduled for the nearest time to manufacture the developmental prototypes for serial production.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Inverter Devices (AREA)
  • Ac-Ac Conversion (AREA)
  • Control Of Electrical Variables (AREA)
EP10849930.2A 2010-04-14 2010-12-31 Dreiphasenstromreaktor mit magnetischer vorspannung Withdrawn EP2560174A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2010114824/07A RU2418332C1 (ru) 2010-04-14 2010-04-14 Электрический трехфазный реактор с подмагничиванием
PCT/RU2010/000820 WO2011129717A1 (ru) 2010-04-14 2010-12-31 Электрический трехфазный реактор с подмагничиванием

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EP2560174A1 true EP2560174A1 (de) 2013-02-20
EP2560174A4 EP2560174A4 (de) 2018-01-24

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EP10849930.2A Withdrawn EP2560174A4 (de) 2010-04-14 2010-12-31 Dreiphasenstromreaktor mit magnetischer vorspannung

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EP (1) EP2560174A4 (de)
RU (1) RU2418332C1 (de)
UA (1) UA102354C2 (de)
WO (1) WO2011129717A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103745813A (zh) * 2013-12-20 2014-04-23 保定天威保变电气股份有限公司 外置式换流变压器铁心拉板柱间环流旁路结构
WO2014167571A1 (en) * 2013-04-11 2014-10-16 U.T.T. Unique Transformer Technologies Ltd. Three-phase chokes and methods of manufacturing thereof
WO2018095852A1 (de) * 2016-11-22 2018-05-31 Wobben Properties Gmbh Windenergieanlage und 3-phasen-drosseleinheit
RU2690662C1 (ru) * 2018-05-25 2019-06-05 Илья Николаевич Джус Управляемый шунтирующий реактор (варианты)
WO2022087775A1 (en) * 2020-10-26 2022-05-05 Siemens Gas And Power Gmbh & Co. Kg Compensation structure for reducing circulating current in window of transformer and transformer comprising compensation structure

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2486619C1 (ru) * 2012-02-07 2013-06-27 Александр Михайлович Брянцев Электрический трехфазный реактор с подмагничиванием
RU2630253C2 (ru) * 2015-06-19 2017-09-06 Иван Николаевич Степанов Электрический реактор с подмагничиванием
RU2659820C1 (ru) * 2017-07-13 2018-07-04 Илья Николаевич Джус Семистержневой трехфазный подмагничиваемый реактор
RU2682648C1 (ru) * 2017-11-10 2019-03-20 Иннокентий Иванович Петров Электрический реактор, управляемый подмагничиванием
RU2701150C1 (ru) * 2019-01-28 2019-09-25 Илья Николаевич Джус УПРАВЛЯЕМЫЙ РЕАКТОР-КОМПЕНСАТОР (варианты)
RU2701144C1 (ru) * 2019-01-28 2019-09-25 Илья Николаевич Джус Управляемый шунтирующий реактор
RU2700569C1 (ru) * 2019-03-26 2019-09-18 Илья Николаевич Джус Управляемый реактор с независимым подмагничиванием

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SU1164795A1 (ru) * 1983-06-01 1985-06-30 Алма-Атинский Энергетический Институт Электроиндукционное устройство
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RU2324250C1 (ru) 2006-12-20 2008-05-10 Александр Михайлович Брянцев Электрический реактор с подмагничиванием
RU2324251C1 (ru) 2006-12-26 2008-05-10 Александр Михайлович Брянцев Электрический реактор с подмагничиванием

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014167571A1 (en) * 2013-04-11 2014-10-16 U.T.T. Unique Transformer Technologies Ltd. Three-phase chokes and methods of manufacturing thereof
CN103745813A (zh) * 2013-12-20 2014-04-23 保定天威保变电气股份有限公司 外置式换流变压器铁心拉板柱间环流旁路结构
WO2018095852A1 (de) * 2016-11-22 2018-05-31 Wobben Properties Gmbh Windenergieanlage und 3-phasen-drosseleinheit
RU2690662C1 (ru) * 2018-05-25 2019-06-05 Илья Николаевич Джус Управляемый шунтирующий реактор (варианты)
WO2022087775A1 (en) * 2020-10-26 2022-05-05 Siemens Gas And Power Gmbh & Co. Kg Compensation structure for reducing circulating current in window of transformer and transformer comprising compensation structure

Also Published As

Publication number Publication date
EP2560174A4 (de) 2018-01-24
UA102354C2 (uk) 2013-06-25
WO2011129717A1 (ru) 2011-10-20
RU2418332C1 (ru) 2011-05-10

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