WO2010032957A2 - 전력 품질 개선 장치 및 전력 공급 시스템 - Google Patents
전력 품질 개선 장치 및 전력 공급 시스템 Download PDFInfo
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- WO2010032957A2 WO2010032957A2 PCT/KR2009/005269 KR2009005269W WO2010032957A2 WO 2010032957 A2 WO2010032957 A2 WO 2010032957A2 KR 2009005269 W KR2009005269 W KR 2009005269W WO 2010032957 A2 WO2010032957 A2 WO 2010032957A2
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
- H01F30/12—Two-phase, three-phase or polyphase transformers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/02—Auto-transformers
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- the present invention relates to a power quality improving apparatus and a power supply system capable of more efficiently removing harmonics and unbalanced currents.
- harmonics and unbalanced currents are generated in the power system. These harmonics and unbalanced currents flow into the low-impedance power source, causing various problems such as cable overheating, increased power loss due to saturation of transformer cores, and malfunction of electrical equipment.
- the technical problem of the present invention is to provide a power quality improvement apparatus that can more efficiently remove harmonics and unbalanced currents and increase productivity.
- Another technical problem of the present invention is to provide a power supply system capable of more efficiently removing harmonics and unbalanced currents and increasing productivity.
- one aspect of the power quality improving apparatus is provided as a single winding transformer, the core having a first leg, a second leg and a third leg; And first windings, second windings, and third windings zigzag wound around the first leg, the second leg, and the third leg, wherein each of the first leg, the second leg, and the third leg includes: Two types of windings selected from the group including the first winding, the second winding, and the third winding are alternately wound, and the two windings wound around each of the first leg, the second leg, and the third leg are It is piled up and wrapped around the iron core in the winding order.
- Another aspect of the power quality improving apparatus is provided as a single winding transformer, an iron core having a first leg, a second leg, and a third leg; A first winding wound in the order of the first leg, the third leg, the first leg, the third leg, and the first leg and connected to a neutral wire; A second winding wound in the order of the second leg, the first leg, the second leg, the first leg, and the second leg and connected to a neutral wire; And a third winding wound in the order of the third leg, the second leg, the third leg, the second leg, and the third leg and connected to the neutral wire, wherein the first leg includes a first winding, The second winding, the first winding, the second winding, and the first winding are sequentially stacked and wound, and the second leg is sequentially stacked with the second winding, the third winding, the second winding, the third winding, and the second winding.
- One aspect of a power supply system includes a selected power quality improving device, wherein the power quality improving device is connected in series between a load and a power supply for supplying power to the load.
- FIG. 1 Another aspect of a power supply system according to another embodiment of the present invention is a load; A power supply unit supplying power to the load; And a power quality improving device connected in series between the load and the power supply and provided as a single winding transformer, the power quality improving device comprising: an iron core having a first leg, a second leg, and a third leg; A first winding wound in the order of the first leg, the third leg, the first leg, the third leg, and the first leg and connected to a neutral wire; A second winding wound in the order of the second leg, the first leg, the second leg, the first leg, and the second leg and connected to a neutral wire; And a third winding wound in the order of the third leg, the second leg, the third leg, the second leg, and the third leg and connected to the neutral wire.
- the power supply system is connected in series between a load and a power supply. Therefore, it is installed as close to the load as possible to obtain a high harmonic reduction effect.
- only one power quality improving apparatus is provided between the power receiving stage and the power distribution stage, thereby reducing the cost and improving the productivity.
- a power quality improvement device between the power distribution stage and the power distribution stage with a relatively large amount of space, it is possible to efficiently utilize the space and easy installation.
- the power quality improving apparatus is formed with a more efficient structure and method is excellent in harmonic reduction function and unbalance cancellation function.
- the power quality improving apparatus according to the embodiments of the present invention can significantly reduce the external volume by winding a plurality of windings overlapping the first leg, the second leg, and the third leg.
- the connection method is easy when zigzag connection, time and unit cost in the manufacturing process can be greatly saved, resulting in a large cost reduction effect.
- the efficiency of the single winding transformer constituting the power quality improving device is increased. That is, it is possible to provide a power quality improvement device which is formed with a more efficient structure and method and has a considerably excellent harmonic reduction function and an unbalance canceling function.
- FIG. 1 is a simplified diagram of a power supply system according to an embodiment of the present invention.
- FIG. 2 is a simplified diagram of a power supply system according to another embodiment of the present invention.
- FIG. 3 is a conceptual diagram of an apparatus for improving power quality according to an embodiment of the present invention.
- FIG. 4 is a perspective view of a power quality improving apparatus according to an embodiment of the present invention.
- FIG. 5 is a plan view of the power quality improving apparatus shown in FIG. 4.
- FIG. 6 is a conceptual diagram of an apparatus for improving power quality according to another embodiment of the present invention.
- FIG. 7 is a perspective view of a power quality improving apparatus according to another embodiment of the present invention.
- FIG. 8 is a plan view of the power quality improving apparatus shown in FIG. 7.
- FIG. 1 is a simplified diagram of a power supply system according to an embodiment of the present invention.
- a power supply system 1 includes a power quality improving apparatus 10.
- the power quality improving apparatus 10 is connected in series between the power supply 12 and the load 30 that output three-phase power supplied along the transmission line from the power plant.
- the power quality improving apparatus 10 of the power supply system 1 according to the embodiment of the present invention attenuates harmonics and cancels an unbalance of voltage (or current) generated by the load 30.
- the power quality improving apparatus 10 of the power supply system 1 according to the embodiment of the present invention is connected in series between the power supply 12 and the load 30, it is installed as close to the load as possible. High harmonics reduction effect can be obtained.
- FIG. 2 is a simplified diagram of a power supply system according to another embodiment of the present invention.
- the power supply system 2 includes a power quality improving apparatus 10a, and the power quality improving apparatus 10a includes a power supply 3 (not shown). It is connected in series between the power receiving end 20a receiving the phase power and the power distribution end 20b distributing three-phase power to the first load 30a and the second load 30b, respectively.
- the power quality improving apparatus 10a of the power supply system 2 attenuates harmonics by itself, and is installed by the power distribution system or by the first load 30a and the second load 30b. This offsets the unbalance of the generated voltage (or current). Meanwhile, in the power supply system 2 according to another embodiment of the present invention, only one power quality improving apparatus 10a needs to be installed in the power supply system 2 including the plurality of loads 30a and 30b. That is, since it is not necessary to provide the power quality improvement apparatus 10a for each load stage, there exists an effect that a cost is reduced and productivity improves. On the other hand, by installing the power quality improving device 10a between the power receiving terminal 20a and the power distribution terminal 20b, which have a relatively large amount of space, the space can be efficiently utilized and easy to install.
- FIG. 3 is a conceptual diagram of an apparatus for improving power quality according to an embodiment of the present invention.
- an apparatus 10 for improving power quality includes an iron core 110 and a coil 200.
- the power quality improving apparatus 10 may be a single winding transformer, and specifically, may be a zigzag single winding transformer.
- the iron core 110 includes a first leg 110a, a second leg 110b, and a third leg 110c, and the first leg 110a, the second leg 110b, and the third leg 110c are It may be located side by side as shown in FIG.
- the iron core 110 may be a silicon steel sheet.
- an amorphous metal may be used.
- the amorphous metal is an amorphous magnetic material obtained by rapidly cooling a molten metal mixed with iron (Fe), boron (B), silicon (Si) and the like.
- Fe iron
- B boron
- Si silicon
- the coil 200 may be connected to the first leg 110a, the second leg 110b, and the third leg 110c in a Y shape.
- the coil 200 includes a first winding 210, a second winding 220, and a third winding 230, and includes a first leg 110a to reduce harmonics and unbalance of voltages and currents generated in a distribution system. ),
- the second leg 110b and the third leg 110c may be wound in a zigzag form.
- the zigzag winding of the coil 200 means that the first winding 210, the second winding 220, and the third winding 230 constituting the coil 200 are formed of the first legs 110a and the first windings of the iron core 110. It means that the winding to the two or more legs selected from the group comprising the second leg (110b) and the third leg (110c). Alternatively, the first winding 210, the second winding 220, and the third winding 230 may be disposed on the first leg 110a, the second leg 110b, and the third leg 110c of the iron core 110, respectively. It means that two or more windings selected from the group including the windings alternately.
- the first winding 210 of the coil 200 may include a first leg 110a and a third leg 110c.
- the first leg 110a, the third leg 110c and the first leg 110a are wound in the order
- the second winding 220 is the second leg 110b, the first leg 110a, the first leg. It winds up in order of the 2nd leg 110b, the 1st leg 110a, and the 2nd leg 110b.
- the third winding 230 of the coil 200 is in the order of the third leg 110c, the second leg 110b, the third leg 110c, the second leg 110b and the third leg 110c. Wind up with.
- the first winding 210, the second winding 220, and the third winding 230 may be connected to the neutral line N, respectively.
- the first winding 210 of the coil 200 may be wound in opposite directions in the first leg 110a and the third leg 110c, and the second winding 220 may be the second leg 110b. And the first leg 110a may be wound in opposite directions to each other.
- the third winding 230 may be wound in opposite directions in the third leg 110c and the second leg 110b. Then, the magnetic flux on the legs 110a, 110b, and 110c has the same magnitude, but the phases of the image currents generated by the loads are opposite to each other, so that the magnetic fluxes are canceled. Will decrease.
- the number of turns may be 1: 1: 1: 1: 1 or 1: 2: 2: 2: 1. That is, for example, the first winding 210 wound in the order of the first leg 110a, the third leg 110c, the first leg 110a, the third leg 110c, and the first leg 110a.
- the present invention is not limited thereto, and it is obvious that the present invention may be wound at various turns ratios within a range that can be realized by those skilled in the art.
- FIG. 4 is a perspective view of a power quality improving apparatus according to an embodiment of the present invention.
- FIG. 5 is a plan view of the power quality improving apparatus shown in FIG. 4.
- the power quality improving apparatus 10 according to an embodiment of the present invention, as described above, the first winding 210, the second winding 220, and the third winding of the coil 200.
- the winding 230 is wound zigzag around the first leg 110a, the second leg 110b and the third leg 110c of the iron core 110.
- the first leg 110a, the second leg (110b) and the third leg (110c) each of the two types selected from the group including the first winding, the second winding 220 and the third winding (230)
- the windings of can be wound alternately. That is, two types of windings wound around each of the first leg 110a, the second leg 110b, and the third leg 110c may be wound around the iron core 110 in the winding order.
- overlapping and winding around the iron core 110 is perpendicular to the axis of one of the first leg 110a, the second leg 110b, and the third leg 110c, as shown in FIGS. 4 and 5. It means to be superimposed on the phosphorus plane. That is, in FIG. 3, to explain the winding method, the first winding 210 and the first winding 210 of the coil 200 may be positioned at different positions on the first leg 110a, the second leg 110b, and the third leg 110c. 2 is a diagram in which the second winding 220 and the third winding 230 are wound.
- the actual configuration of the power quality improving apparatus 10 as shown in Figures 4 and 5, the first winding 210, the second winding 220 of the coil 200 ) And the third winding 230 are wound by being superimposed on the legs 110a, 110b, and 110c in the order in which they are wound.
- each of the first leg 110a, the second leg 110b, and the third leg 110c includes a first winding 210, a second winding 220, and a third winding 230.
- the two selected windings may be alternately wound, and the winding wound first on each of the first leg 110a, the second leg 110b, and the third leg 110c may be wound in contact with each leg.
- the wound winding may be wound so that a distance from the wound leg 110a, 110b, 110c is increased in the order of winding.
- the first winding 110a, the first winding 210, the second winding 220, the first winding 210, the second winding 220 and the first winding 210 are sequentially overlapped and wound up. do.
- the wound windings are wound so as to be insulated from each other. That is, the first winding 210, the second winding 220, the first winding 210, the second winding 220, and the first winding 210 sequentially wound on the first leg 110a may be predetermined. It is formed spaced apart from each other, so as to be insulated from each other.
- the second winding 220, the third winding 230, the second winding 220, the third winding 230, and the second winding 220 are sequentially stacked and wound up and wound up. Windings are wound to insulate each other. That is, the second winding 220, the third winding 230, the second winding 220, the third winding 230, and the second winding 220 which are sequentially wound on the second leg 110b are predetermined to each other. It is formed spaced apart from each other, so as to be insulated from each other.
- the third winding 110c, the third winding 230, the first winding 210, the third winding 230, the first winding 210, and the third winding 230 are sequentially stacked and wound up and wound up. Windings are wound to insulate each other. That is, the third winding 230, the first winding 210, the third winding 230, the first winding 210, and the third winding 230 which are sequentially wound on the third leg 110c are predetermined to each other. It is formed spaced apart from each other, so as to be insulated from each other.
- the power quality improving apparatus 10 may be a single winding transformer manufactured by an insulation method selected from a group including a dry type, a mold type, an inflow type, and a gas type, but is not limited thereto.
- a dry transformer is a transformer that is used without immersing in insulating oil, and is a transformer insulated by exposing and cooling the transformer body in the air instead of insulating oil. Molded transformers are molded by epoxy, a nonflammable material.
- An inflow transformer is a transformer using insulating oil as an insulating medium.
- the gas transformer is a transformer using a gas such as SF6 gas as an insulating medium.
- the power quality improving apparatus 10 may adopt any type of insulation method as long as it is a structure in which overlapping windings may be formed by being insulated and spaced apart in the winding order.
- the present invention may include an insulation method other than the above-described method within the scope that can be implemented by those skilled in the art.
- the first winding 210 is wound in a zigzag in the order of the first leg (110a), the third leg (110c), the first leg (110a), the third leg (110c) and the first leg (110a).
- the windings insulated and spaced apart from each other as shown in FIGS. 4 and 5, are connected to the first connection line 211. .
- the first winding 210 is wound separately by winding the first leg 110a and the third leg 110c, respectively, and connects the plurality of first windings 210 separated by a plurality of first connection lines 211.
- the first windings 210 on the first leg 110a and the third leg 110c are connected.
- the second winding 220 is wound separately on the first leg 110a and the second leg 110b, respectively, and connects a plurality of second windings 220 separated by the second connection line 221 to connect the plurality of windings.
- the second windings 220 on the first leg 110a and the second leg 110b are connected.
- the third winding 230 is wound around the second leg 110b and the third leg 110c, respectively, and connects a plurality of third windings 230 separated by the third connecting line 231 to the second leg.
- the third windings 230 on the 110b and the third leg 110c are connected.
- the first connection line 211, the second connection line 221, and the third connection line 231 are expressed in different thicknesses, but are not limited thereto. That is, the first connecting line 211, the second connecting line 221, and the third connecting line 231 may have the same thickness or may be different from each other. Alternatively, the first connection line 211, the second connection line 221, and the third connection line 231 may be formed of the same line as the first winding 210, the second winding 220, and the third winding 230, respectively. It may be.
- a plurality of windings are wound around the first leg 110a, the second leg 110b, and the third leg 110c.
- each of the plurality of windings is wound in different positions of the legs.
- a plurality of windings are wound side by side in the axial direction of the legs.
- the winding is wound around three legs, for example in the form of the conceptual diagram shown in FIG. 3 or 6.
- the space and volume required are significantly increased because a distance must be secured between a plurality of windings wound side by side on the legs.
- the wiring method is complicated and difficult to manufacture when zigzag wiring interlaced with each other, causing the unit cost increases.
- the leakage current also increases.
- a plurality of windings are overlapped in a plane perpendicular to the axial direction of each of the first leg 110a, the second leg 110b, and the third leg 110c. Wind up. That is, since a plurality of windings are wound around the axes of the legs 110a, 110b, and 110c, the required lengths of the legs 110a, 110b, and 110c are significantly shortened. Therefore, the volume of the external transformer can be greatly reduced.
- the connection method in the zigzag connection is easy. Specifically, referring to FIGS. 4 and 5, the first winding 210 and the second winding 220 wound on the first leg 110a, the second leg 110b, and the third leg 110c are overlapped. And the third winding 230 are connected to the first connection line 211, the second connection line 221, and the third connection line 231, respectively. Therefore, time and unit cost in a manufacturing process can be saved significantly, and a cost reduction effect is large.
- the power quality improving apparatus by efficiently connecting to a small volume, the efficiency of the power quality improving apparatus composed of a single winding transformer is increased. That is, it is possible to provide a power quality improvement apparatus formed with a more efficient structure and method, while having the performance of a transformer, while having an excellent harmonic reduction function and an unbalance canceling function.
- 6 is a conceptual diagram of an apparatus for improving power quality according to another embodiment of the present invention.
- 7 is a perspective view of a power quality improving apparatus according to another embodiment of the present invention.
- FIG. 8 is a plan view of the power quality improving apparatus shown in FIG. 7.
- the power quality improving apparatus according to another embodiment of the present invention differs from the power quality improving apparatus according to an embodiment of the present invention in zigzag number of coils.
- the same content as the power quality improving apparatus according to an embodiment of the present invention will be omitted below.
- the first winding 212 of the coil 202 of the power quality improving apparatus 12 is the order of the first leg 112a, the third leg 112b and the first leg 112a. Zigzag connection is made.
- the second winding 222 of the coil 202 is zigzag connected in the order of the second leg 112b, the first leg 112a and the second leg 112b.
- the third winding 232 of the coil 202 is zigzag-connected in the order of the third leg 112c, the second leg 112b, and the third leg 112c. At this time, the windings sequentially wound on the legs 112a, 112b, and 112c are wound while being overlapped, but are wound and spaced apart from each other in the same way as the power quality improving apparatus according to the embodiment of the present invention.
- each of the first winding 212, the second winding 222, and the third winding 232 formed separately from the different legs 112a, 112b, and 112c may have a first connection line 213 and a second connection line 223.
- the third connection line 233 may be formed separately from the different legs 112a, 112b, and 112c.
- the description in the embodiments of the present invention described above is merely exemplary, and the scope of the present invention may include both a power quality improving apparatus and a power supply system derivable from the overall gist of the present specification. .
- the transformer and the system in which the main features of the present invention can be implemented in addition to the power quality improving apparatus and the power supply system of the structure described by way of example.
- both the power quality improving apparatus and the power supply system including a structure in which windings are wound in a plane perpendicular to a plane perpendicular to the axis of the legs constituting the iron core, that is, a structure in which a plurality of windings are wound in a periphery of the core are wound. It may be included in the range of.
- a transformer including a structure wound by overlapping a plurality of windings may be included in the scope of the present invention regardless of the zigzag order, method, and number.
- a transformer including a structure wound by winding a plurality of windings on an iron core may be included in the scope of the present invention regardless of an insulation method, a constituent material, and a wiring method.
- the power quality improving apparatus and power supply system including the harmonic and current unbalance improving function according to the embodiments of the present invention may be applied to all systems and structures in the art for improving harmonics and current unbalance. It can also be applied to all technical fields where harmonic reduction and unbalance improvement are required.
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Claims (14)
- 단권 변압기로 제공되는 전력 품질 개선 장치에 있어서,제1 레그, 제2 레그 및 제3 레그를 구비하는 철심; 및상기 제1 레그, 상기 제2 레그 및 상기 제3 레그에 지그재그로 권취된 제1 권선, 제2 권선 및 제3 권선을 포함하며,상기 제1 레그, 제2 레그 및 제3 레그 각각에는 상기 제1 권선, 상기 제2 권선 및 상기 제3 권선을 포함하는 그룹에서 선택된 두 종류의 권선이 교대로 권취되되, 상기 제1 레그, 제2 레그 및 제3 레그 각각에 권취된 두 종류의 권선은 권취 순서대로 철심 둘레에 중첩되어 귄취된 전력 품질 개선 장치.
- 제 1항에 있어서,상기 제1 레그, 제2 레그 및 제3 레그 각각에 교대로 권취된 두 종류의 권선은 권취되는 순서대로 권취된 레그와의 이격거리가 커지도록 권취되는 전력 품질 개선 장치.
- 제 2항에 있어서,상기 제1 레그, 제2 레그 및 제3 레그 각각에 첫번째로 권취된 권선은 각각의 레그와 접하여 권취된 전력 품질 개선 장치.
- 제 1항에 있어서,상기 제1 레그, 제2 레그 및 제3 레그 각각에 교대로 권취된 두 종류의 권선은 권취되는 순서대로 상기 레그의 축에 수직인 평면에 중첩되어 권취되는 전력 품질 개선 장치.
- 제 1항에 있어서,상기 제1 레그에는 제1 권선, 제2 권선, 제1 권선이 순차적으로 중첩되어 권취되고,상기 제2 레그에는 제2 권선, 제3 권선, 제2 권선이 순차적으로 중첩되어 권취되고,상기 제3 레그에는 제3 권선, 제1 권선, 제3 권선이 순차적으로 중첩되어 권취된 전력 품질 개선 장치.
- 제 1항에 있어서,상기 제1 레그에는 제1 권선, 제2 권선, 제1 권선, 제2 권선, 제1 권선이 순차적으로 중첩되어 권취되고,상기 제2 레그에는 제2 권선, 제3 권선, 제2 권선, 제3 권선, 제2 권선이 순차적으로 중첩되어 권취되고,상기 제3 레그에는 제3 권선, 제1 권선, 제3 권선, 제1 권선, 제3 권선이 순차적으로 중첩되어 권취된 전력 품질 개선 장치.
- 제 1항에 있어서,상기 제1 권선은 상기 제1 레그, 상기 제3 레그 및 상기 제1 레그의 순서로 권취되고,상기 제2 권선은 상기 제2 레그, 상기 제1 레그 및 상기 제2 레그의 순서로 권취되고,상기 제3 권선은 상기 제3 레그, 상기 제2 레그 및 상기 제3 레그의 순서로 권취된 전력 품질 개선 장치.
- 제 1항에 있어서,상기 제1 권선은 상기 제1 레그, 상기 제3 레그, 상기 제1 레그, 상기 제3 레그 및 상기 제1 레그의 순서로 권취되고,상기 제2 권선은 상기 제2 레그, 상기 제1 레그, 상기 제2 레그, 상기 제1 레그 및 상기 제2 레그의 순서로 권취되고,상기 제3 권선은 상기 제3 레그, 상기 제2 레그, 상기 제3 레그, 상기 제2 레그 및 상기 제3 레그의 순서로 권취된 전력 품질 개선 장치.
- 제 1항에 있어서,상기 단권 변압기는 건식, 몰드식, 유입식 및 가스식을 포함하는 그룹에서 선택된 절연방식으로 제조된 전력 품질 개선 장치.
- 단권 변압기로 제공되는 전력 품질 개선 장치에 있어서,제1 레그, 제2 레그 및 제3 레그를 구비하는 철심;상기 제1 레그, 상기 제3 레그, 상기 제1 레그, 상기 제3 레그 및 상기 제1 레그의 순서로 권취되어 중성선에 연결되는 제1 권선;상기 제2 레그, 상기 제1 레그, 상기 제2 레그, 상기 제1 레그 및 상기 제2 레그의 순서로 권취되어 중성선에 연결되는 제2 권선; 및상기 제3 레그, 상기 제2 레그, 상기 제3 레그, 상기 제2 레그 및 상기 제3 레그의 순서로 권취되어 중성선에 연결되는 제3 권선을 포함하여,상기 제1 레그에는 제1 권선, 제2 권선, 제1 권선, 제2 권선, 제1 권선이 차례로 중첩되어 권취되고,상기 제2 레그에는 제2 권선, 제3 권선, 제2 권선, 제3 권선, 제2 권선이 차례로 중첩되어 권취되고,상기 제3 레그에는 제3 권선, 제1 권선, 제3 권선, 제1 권선, 제3 권선이 차례로 중첩되어 권취된 전력 품질 개선 장치.
- 제 10항에 있어서,상기 각 레그에 중첩되어 권취된 다수개의 권선은 각각 상기 권취된 레그의 축에 수직인 평면에 중첩되어 권취되고, 상기 각 레그에 중첩되어 권취된 다수개의 권선은 귄취되는 순서대로 권취된 레그와의 이격거리가 커지도록 권취되는 전력 품질 개선 장치.
- 제1항 내지 제11항에서 선택된 전력 품질 개선 장치를 포함하되,상기 전력 품질 개선 장치는 부하와 상기 부하에 전원을 공급하는 전원장치 사이에 직렬로 연결된 전력 공급 시스템.
- 제12항에 있어서,상기 전력 품질 개선 장치는 수전단 및 배전단 사이에 직렬로 연결된 전력 공급 시스템.
- 부하;상기 부하에 전원을 공급하는 전원장치; 및상기 부하와 상기 전원장치 사이에 직렬로 연결되며 단권 변압기로 제공되는 전력 품질 개선 장치를 포함하되,상기 전력 품질 개선 장치는,제1 레그, 제2 레그 및 제3 레그를 구비하는 철심;상기 제1 레그, 상기 제3 레그, 상기 제1 레그, 상기 제3 레그 및 상기 제1 레그의 순서로 권취되어 중성선에 연결되는 제1 권선;상기 제2 레그, 상기 제1 레그, 상기 제2 레그, 상기 제1 레그 및 상기 제2 레그의 순서로 권취되어 중성선에 연결되는 제2 권선; 및상기 제3 레그, 상기 제2 레그, 상기 제3 레그, 상기 제2 레그 및 상기 제3 레그의 순서로 권취되어 중성선에 연결되는 제3 권선을 포함하는 전력 공급 시스템.
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US13/060,056 US20110148556A1 (en) | 2008-09-17 | 2009-09-16 | Power quality improvement device and power supply system |
KR1020097020979A KR101173632B1 (ko) | 2008-09-17 | 2009-09-16 | 전력 품질 개선 장치 및 전력 공급 시스템 |
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