RU2706646C1 - Three-phase electromagnetic device - Google Patents

Three-phase electromagnetic device Download PDF

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Publication number
RU2706646C1
RU2706646C1 RU2019114934A RU2019114934A RU2706646C1 RU 2706646 C1 RU2706646 C1 RU 2706646C1 RU 2019114934 A RU2019114934 A RU 2019114934A RU 2019114934 A RU2019114934 A RU 2019114934A RU 2706646 C1 RU2706646 C1 RU 2706646C1
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windings
phase
network
phases
winding
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RU2019114934A
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Russian (ru)
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Илья Николаевич Джус
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Илья Николаевич Джус
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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
    • H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
    • 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
    • Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)

Abstract

FIELD: electrical engineering.
SUBSTANCE: invention relates to electrical engineering and can be used in transformers and reactors with magnetic core of power systems. There is a three-phase magnetic conductor (1, 2, 3), on which network windings (4, 5, 6) are placed connected to each other in a star and in two phases of magnetic conductor (1, 3) there are compensating windings (7, 8) connected between opposite to each other.
EFFECT: new, leading to simplification, is that the terminals of the circuit of these windings 7, 8 are connected to the outputs of winding 5 of the third phase.
1 cl, 1 dwg

Description

Предложение относится к электротехнике и используется в энергетических системах в трансформаторах и реакторах с магнитным сердечником.The proposal relates to electrical engineering and is used in energy systems in transformers and reactors with a magnetic core.

Широко известны и широко применяемые /1/ электромагнитные устройства (далее - Эу), содержащие магнитопровод на котором размещены сетевые обмотки, соединенные между собой в звезду. Недостаток такого устройства состоит в искажении сетевого напряжения и увеличении потерь от гармоник тока, кратных трем.Widely known and widely used / 1 / electromagnetic devices (hereinafter - EI), containing a magnetic circuit on which the network windings are connected, interconnected in a star. The disadvantage of this device is the distortion of the mains voltage and the increase in losses from current harmonics, a multiple of three.

Прототипом предложения является ЭУ /2/, содержащий магнитопроводы на которых размещены сетевые обмотки, соединенные между собой в звезду и в двух фазах магнитопровода компенсационные обмотки, соединенные между собой встречно. Недостаток такого устройства состоит в относительно большой сложности, обусловленной наличием компенсационных обмоток во всех трех фазах.The prototype of the proposal is EU / 2 /, containing magnetic cores on which network windings are located, interconnected in a star and in two phases of the magnetic circuit compensation windings interconnected in the opposite direction. The disadvantage of this device is the relatively high complexity due to the presence of compensation windings in all three phases.

Технический результат предложения - упрощение. Технический результат достигается за счет того, что в ЭУ выводы цепи двух фаз компенсационных обмоток подключены к выводам сетевой обмотки третьей фазы.The technical result of the proposal is simplification. The technical result is achieved due to the fact that in the EU the conclusions of the circuit of two phases of the compensation windings are connected to the conclusions of the network winding of the third phase.

На чертеже представлена схема ЭУ. На магнитопроводах 1, 2, 3 (выполнены раздельно или моноблоком) размещены сетевые обмотки 4, 5, 6. В двух фазах имеются компенсационные обмотки 7, 8. ЭУ работает следующим образом. ЭУ является трансформатором, изменяющим величину напряжения, для чего в каждую фазу чертежа должна быть добавлена еще одна обмотка или реактором, ограничивающим ток, как это показано на чертеже. Из-за нелинейности магнитопроводов 1-3 в сетевых обмотках появляются токи гармоник, кратные трем. Могут быть также другие причины этих токов: нелинейная нагрузка и т.п. Эти токи являются нежелательными, ибо искажают форму сетевого напряжения и увеличивают потери энергии. Для компенсации этого влияния компенсационные обмотки 7, 8 и сетевая обмотка 5 третьей фазы включаются в замкнутый треугольник, в котором практически отсутствует ток основной (50 Гц) гармоники, но замыкаются токи тройной частоты. Компенсационные обмотки также симметрируют фазы между собой. Как видно для такой компенсации не требуется намотка специальной компенсационной обмотки в одной (третьей) фазе, ибо ее роль выполняет сетевая обмотка 5. К этой обмотке (или возможно к части ее витков) присоединяется цепь компенсационных обмотку двух фаз. Это снижает массу и габариты ЭУ.The drawing shows a diagram of the EU. On the magnetic circuits 1, 2, 3 (made separately or in a monoblock), the network windings 4, 5, 6 are located. In two phases, there are compensation windings 7, 8. The EU works as follows. An EI is a transformer that changes the voltage value, for which another winding must be added to each phase of the drawing or a current limiting reactor, as shown in the drawing. Due to the nonlinearity of magnetic circuits 1-3, harmonic currents that are multiples of three appear in the network windings. There may also be other causes of these currents: non-linear load, etc. These currents are undesirable because they distort the shape of the mains voltage and increase energy losses. To compensate for this effect, the compensation windings 7, 8 and the network winding 5 of the third phase are included in a closed triangle, in which the main (50 Hz) harmonic current is practically absent, but triple frequency currents are closed. Compensation windings also balance the phases with each other. As can be seen, such compensation does not require the winding of a special compensation winding in one (third) phase, because its role is played by the network winding 5. A chain of compensating windings of two phases is connected to this winding (or possibly to part of its turns). This reduces the weight and dimensions of the EU.

Источники информацииInformation sources

1. Копылов И.П. Электрические машины. М.:, «Высш. шк.; Логос; 2000, стр. 175, рис. 2.54.1. Kopylov I.P. Electric cars. M.:, "Higher. school; Logo; 2000, p. 175, fig. 2.54.

2. Патент РФ на изобретение.2. RF patent for an invention.

Claims (1)

Трехфазное электромагнитное устройство, содержащее магнитопровод, на котором размещены сетевые обмотки, соединенные между собой в звезду, и в двух фазах магнитопровода компенсационные обмотки, соединенные между собой встречно, отличающееся тем, что выводы цепи этих обмоток подключены к выводам сетевой обмотки третьей фазы.A three-phase electromagnetic device containing a magnetic circuit, on which there are network windings connected to each other in a star, and in two phases of the magnetic circuit compensating windings connected in opposite directions, characterized in that the conclusions of the circuit of these windings are connected to the terminals of the network winding of the third phase.
RU2019114934A 2019-05-16 2019-05-16 Three-phase electromagnetic device RU2706646C1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1661911A1 (en) * 1988-08-15 1991-07-07 Сибирский научно-исследовательский институт энергетики Method of suppressing arc replenish current and recovering voltage in disconnected phase of electric power line
RU2137277C1 (en) * 1998-01-08 1999-09-10 Шинкаренко Сергей Михайлович Device for differential reverse-sequence current filter of three-phase power installation
US9882387B2 (en) * 2016-05-31 2018-01-30 Lsis Co., Ltd. Reactive power compensation system and method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1661911A1 (en) * 1988-08-15 1991-07-07 Сибирский научно-исследовательский институт энергетики Method of suppressing arc replenish current and recovering voltage in disconnected phase of electric power line
RU2137277C1 (en) * 1998-01-08 1999-09-10 Шинкаренко Сергей Михайлович Device for differential reverse-sequence current filter of three-phase power installation
US9882387B2 (en) * 2016-05-31 2018-01-30 Lsis Co., Ltd. Reactive power compensation system and method thereof

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