CN115312308A - Method for reducing additional loss of converter transformer - Google Patents
Method for reducing additional loss of converter transformer Download PDFInfo
- Publication number
- CN115312308A CN115312308A CN202211044106.2A CN202211044106A CN115312308A CN 115312308 A CN115312308 A CN 115312308A CN 202211044106 A CN202211044106 A CN 202211044106A CN 115312308 A CN115312308 A CN 115312308A
- Authority
- CN
- China
- Prior art keywords
- plate
- copper plate
- copper
- compensation
- iron core
- 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.)
- Pending
Links
Images
Classifications
-
- 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
- H01F27/36—Electric or magnetic shields or screens
-
- 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
- H01F27/24—Magnetic cores
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/266—Fastening or mounting the core on casing or support
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Regulation Of General Use Transformers (AREA)
Abstract
The invention belongs to the technical field of transformers, and particularly relates to a novel method for reducing additional loss of a converter transformer, wherein a compensating copper plate is used for replacing a last-stage silicon steel sheet on a voltage regulating side of the converter transformer, and a compensating insulation plate is used for completely insulating the compensating copper plate and a next-last-stage silicon steel sheet; and an upper iron core copper plate is assembled on the upper part of the iron core pulling plate and a lower iron core copper plate is assembled on the lower part of the iron core pulling plate on the net side and the valve side of the converter transformer to form a magnetic flux leakage compensation loop. A compensation copper plate is designed on the voltage regulating side of the converter transformer, and the compensation of magnetic flux leakage of large current caused by a voltage regulating lead on the voltage regulating side is realized in a mode that a compensation insulating plate is insulated from a secondary final silicon steel sheet of an iron core. The upper iron core copper plate and the lower iron core copper plate are designed on the net side and the valve side of the converter transformer and assembled with the iron core pulling plate to form an equipotential integral structure, so that the magnetic leakage on the net side and the valve side is effectively inhibited.
Description
Technical Field
The invention belongs to the technical field of transformers, and particularly relates to a novel method for reducing additional loss of a converter transformer.
Background
As the voltage and capacity of the transformer increase, the load current of the transformer in operation becomes larger and larger, and the leakage magnetic field generated by such large current is very strong. It is needless to say that the additional losses generated by such large currents in the metallic structural parts of the transformer are also large, and the distribution of these additional losses is extremely uneven, which is likely to cause local overheating of the transformer.
For the converter transformer with large rated voltage and rated capacity, the number and the length of the voltage regulating leads are more than those of the conventional products, the generated current is more than that of the conventional products, the leakage flux distribution is more complicated, and how to reduce the additional loss needs to be considered on the voltage regulating side of the converter transformer. Meanwhile, for the network side and the valve side coils which bear the voltage and the current of the alternating electric field and the direct current field at the same time, the network side and the valve side of the converter transformer also need to consider how to reduce the additional loss. Therefore, a new method for reducing the additional loss of the converter transformer is needed.
Disclosure of Invention
In order to solve the technical problems, the invention provides a novel method for reducing the additional loss of the converter transformer, wherein the voltage regulating side, the network side and the valve side of the converter transformer are respectively provided with a leakage magnetic shielding structure, so that the leakage magnetic flux entering metal structural members such as a converter transformer iron core clamping piece and the like can be effectively inhibited, and the additional loss of a transformer product is reduced.
The technical scheme adopted by the invention is as follows:
a method for reducing additional loss of a converter transformer comprises the following steps:
and 2, assembling an upper iron core copper plate on the upper part of the iron core pulling plate and a lower iron core copper plate on the lower part of the iron core pulling plate on the net side and the valve side of the converter transformer to form a magnetic flux leakage compensation loop.
The invention has the beneficial effects that:
a compensation copper plate is designed on the voltage regulating side of the converter transformer, and the compensation of magnetic flux leakage of large current caused by a voltage regulating lead on the voltage regulating side is realized in a mode that a compensation insulating plate is insulated from a secondary final silicon steel sheet of an iron core. The upper iron core copper plate and the lower iron core copper plate are designed on the net side and the valve side of the converter transformer and assembled with the iron core pulling plate to form an equipotential integral structure, so that the magnetic leakage on the net side and the valve side is effectively inhibited.
The invention can effectively inhibit the leakage flux entering metal structural members such as the iron core clamp of the converter transformer and the like, and reduce the additional loss of products. By the structure and the method, additional loss caused by magnetic leakage is effectively inhibited. The structure and the method have the advantages of obvious effect of reducing additional loss, simple structure, convenient operation, high generalization degree, reliable and stable assembly and the like.
Drawings
FIG. 1 is an assembly schematic of a voltage regulation side leakage magnetic shield configuration of an embodiment of the present invention;
FIG. 2 is an assembly schematic of a compensating copper plate of an embodiment of the present invention;
fig. 3-1 is an assembled front view of an upper core copper plate of an embodiment of the present invention;
fig. 3-2 is an assembled top view of the upper core copper plate of the embodiment of the present invention;
fig. 3-3 are assembled left side views of the upper core copper plate of the embodiment of the present invention;
fig. 4-1 is an assembled front view of the lower core copper plate of the embodiment of the present invention;
fig. 4-2 is an assembled top view of the lower core copper plate of the embodiment of the present invention;
fig. 4-3 are assembled left side views of the lower core copper plate of the embodiment of the present invention;
in the figure, 1 is a compensation insulation plate, 2 is a compensation copper plate, 2.1 is a first compensation copper plate, 2.2 is a second compensation copper plate, 2.3 is a third compensation copper plate, 2.4 is a fourth compensation copper plate, 2.5 is a fifth compensation copper plate, 3.1 is a first upper iron core copper plate, 3.2 is a second upper iron core copper plate, 3.3 is a third upper iron core copper plate, 3.4 is a fourth upper iron core copper plate, 4.1 is a first lower iron core copper plate, 4.2 is a second lower iron core copper plate, 4.3 is a third lower iron core copper plate, 4.4 is a fourth upper iron core copper plate, 5 is a secondary silicon steel sheet, 6 is an iron core pulling plate, 7 is an iron core pulling plate upper portion, and 8 is an iron core pulling plate lower portion.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings. Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar parts throughout or parts having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, unless otherwise explicitly stated or limited, the terms "connected" and "fixed" are to be construed broadly and may include, for example, fixed connections, detachable connections, mechanical connections, electrical connections, direct connections, indirect connections through an intermediary, communication between two elements, or an interaction between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but with another feature therebetween. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used based on the orientations or positional relationships shown in the drawings for convenience of description and simplicity of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The embodiments of the present invention are merely examples for clearly illustrating the invention and are not intended to limit the embodiments of the invention. Other variations and modifications will be apparent to persons skilled in the art upon reference to the following description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
A method for reducing additional loss of a converter transformer comprises the following steps:
As shown in fig. 1, it is an assembly schematic diagram of a voltage-regulating side leakage magnetic shield structure of an embodiment of the present invention; fig. 2 is a schematic view showing the assembly of the compensation copper plate according to the embodiment of the present invention. The compensation insulating plate 1 is made of high-temperature-resistant transformer oil-resistant material with excellent insulating property, and the width of the compensation insulating plate 1 is the same as that of the penultimate silicon steel sheet 5. The compensation copper plate 2 is made of copper plate with excellent conductivity and is formed by assembling a first compensation copper plate 2.1, a second compensation copper plate 2.2, a third compensation copper plate 2.3, a fourth compensation copper plate 2.4 and a fifth compensation copper plate 2.5. The length of the first compensation copper plate 2.1 is matched with the distance M0' between the main column and the side column, the width of the first compensation copper plate 2.1 is 10-15mm smaller than that of the secondary final-stage silicon steel sheet 5, and the center lines of the first compensation copper plate 2.1 and the secondary final-stage silicon steel sheet 5 are the same during assembly. The length of second compensation copper 2.2 and the cooperation of the distance M0 between two principal posts, the width of second compensation copper 2.2 is 10mm less than the width of time final stage silicon steel sheet 5, and the second compensation copper 2.2 is the same with the central line of time final stage silicon steel sheet 5 during the assembly. The fourth compensation copper plate 2.4 is an iron core side column compensation copper plate, the width of the fourth compensation copper plate 2.4 is 10-15mm smaller than that of the next-to-last-stage silicon steel sheet 5 of the side column, and the fourth compensation copper plate 2.4 is the same as the central line of the next-to-last-stage silicon steel sheet 5 of the side column during assembly. The fifth compensation copper plate 2.5 is an iron core main column compensation copper plate, the width of the fifth compensation copper plate 2.5 is 10-15mm smaller than that of the secondary final-stage silicon steel sheet 5 of the main column, and the fifth compensation copper plate 2.5 is the same as the central line of the secondary final-stage silicon steel sheet 5 of the main column during assembly. And a third compensation copper plate 2.3 is respectively assembled at the joint of the fourth compensation copper plate 2.4 and the first compensation copper plate 2.1, the joint of the first compensation copper plate 2.1 and the fifth compensation copper plate 2.5 and the joint of the fifth compensation copper plate 2.5 and the second compensation copper plate 2.2, wherein the third compensation copper plate 2.3 is a connection compensation copper plate. The sum of the thickness of the compensation insulating plate 1 and the thickness of the compensation copper plate 2 is the same as the thickness of the final-stage silicon steel sheet on the net side and the valve side. The compensation insulating plate 1 is adapted to the compensation copper plate 2 and is also formed by assembling a plurality of compensation insulating plates, and plays a role in completely insulating the compensation copper plate and the next-last-stage silicon steel sheet.
And 2, assembling an upper iron core copper plate on the upper part of the iron core pulling plate 6 and a lower iron core copper plate on the lower part of the iron core pulling plate 6 on the net side and the valve side of the converter transformer to form a magnetic leakage compensation loop, so that the additional loss caused by the magnetic leakage on the net side and the valve side is reduced. Through the improved technical scheme, after the leakage magnetic field generated by the converter transformer passes through the iron core copper plate, a large number of alternating eddy currents can be generated in the transformer, and the alternating eddy currents changing along with time can generate a counter magnetic field relative to the leakage magnetic field, so that the leakage magnetic flux is prevented from further passing through the iron core copper plate, and the additional loss of the whole transformer is effectively reduced.
As shown in fig. 3-1, is an assembly front view of the upper core copper plate of the embodiment of the present invention; as shown in fig. 3-2, which is an assembled top view of the upper core copper plate of the embodiment of the present invention; as shown in fig. 3-3, is an assembled left side view of the upper core copper plate of the embodiment of the present invention. The upper iron core copper plate is assembled by a first upper iron core copper plate 3.1, a second upper iron core copper plate 3.2, a third upper iron core copper plate 3.3 and a fourth upper iron core copper plate 3.4. The first upper iron core copper plate 3.1 is an L-shaped copper plate, and the first upper iron core copper plate 3.1 connects the upper part 7 of the iron core pulling plate and the fourth upper iron core copper plate 3.4. The second upper iron core copper plate 3.2 is an L-shaped copper plate, and the second upper iron core copper plate 3.2 connects the upper part 7 of the iron core pulling plate and the third upper iron core copper plate 3.3. The length of the third upper iron core copper plate 3.3 is matched with the distance M0 between the two main columns, and the width of the third upper iron core copper plate 3.3 is generally 50mm-100mm. The length of the fourth upper iron-core copper plate 3.4 is matched with the distance M0' between the main column and the side column, and the width of the fourth upper iron-core copper plate 3.4 is generally 50mm-100mm. The first upper iron core copper plate 3.1, the second upper iron core copper plate 3.2, the third upper iron core copper plate 3.3 and the fourth upper iron core copper plate 3.4 are assembled through metal fasteners, so that the upper iron core copper plates and the iron core pulling plate 6 form an equipotential whole.
As shown in fig. 4-1, is an assembly front view of the lower core copper plate of the embodiment of the present invention; as shown in fig. 4-2, which is an assembled top view of the lower core copper plate of the embodiment of the present invention; as shown in fig. 4-3, which is an assembled left side view of the lower core copper plate of the embodiment of the present invention. The lower iron core copper plate is formed by assembling a first lower iron core copper plate 4.1, a second lower iron core copper plate 4.2, a third lower iron core copper plate 4.3 and a fourth upper iron core copper plate 4.4. And the specification and size of each component of the lower iron core copper plate are the same as those of the upper iron core copper plate, which will not be described herein again. The first lower iron core copper plate 4.1, the second lower iron core copper plate 4.2, the third lower iron core copper plate 4.3 and the fourth upper iron core copper plate 4.4 are assembled through metal fasteners, so that the lower iron core copper plates and the iron core pulling plate 6 form an equipotential whole.
Finally, it is to be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, and the scope of the present invention is not limited thereto. Those skilled in the art will understand that: modifications and variations of the embodiments described above may be apparent to those skilled in the art, or equivalent arrangements of parts of the technical features may be substituted, without departing from the scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein.
Claims (8)
1. A method for reducing additional loss of a converter transformer is characterized by comprising the following steps:
step 1, replacing the last-stage silicon steel sheet with a compensation copper plate (2) at the voltage regulating side of the converter transformer, and insulating the compensation copper plate (2) and the next-to-last-stage silicon steel sheet (5) by a compensation insulating plate (1);
and 2, assembling an upper iron core copper plate on the upper part of the iron core pulling plate (6) and a lower iron core copper plate on the lower part of the iron core pulling plate (6) on the net side and the valve side of the converter transformer to form a magnetic flux leakage compensation loop.
2. A method for reducing additional loss of converter transformer according to claim 1, characterized in that said compensating insulating plate (1) is made of insulating material with high temperature resistance and transformer oil resistance, and the width of compensating insulating plate (1) is the same as the width of next-to-last silicon steel sheet (5).
3. A method for reducing additional losses of a converter transformer according to claim 1, characterized in that the compensating copper plate (2) is made of a conductive copper plate.
4. A method for reducing additional loss of a converter transformer according to claim 3, characterized in that the compensation copper plate (2) is assembled by a first compensation copper plate (2.1), a second compensation copper plate (2.2), a third compensation copper plate (2.3), a fourth compensation copper plate (2.4) and a fifth compensation copper plate (2.5), the length of the first compensation copper plate (2.1) matches with the distance M0' between the main column and the side column, the width of the first compensation copper plate (2.1) is 10-15mm smaller than the width of the second-last-stage silicon steel sheet (5), and the center lines of the first compensation copper plate (2.1) and the second-last-stage silicon steel sheet (5) are the same during assembly; the length of the second compensation copper plate (2.2) is matched with the distance M0 between the two main columns, the width of the second compensation copper plate (2.2) is 10mm smaller than that of the secondary-final-stage silicon steel sheet (5), and the center lines of the second compensation copper plate (2.2) and the secondary-final-stage silicon steel sheet (5) are the same during assembly; the fourth compensation copper plate (2.4) is an iron core side column compensation copper plate, the width of the fourth compensation copper plate (2.4) is 10-15mm smaller than that of the next-to-last-stage silicon steel sheet (5) of the side column, and the fourth compensation copper plate (2.4) is the same as the central line of the next-to-last-stage silicon steel sheet (5) of the side column during assembly; the fifth compensation copper plate (2.5) is an iron core main column compensation copper plate, the width of the fifth compensation copper plate (2.5) is 10-15mm smaller than that of the secondary final-stage silicon steel sheet (5) of the main column, and the fifth compensation copper plate (2.5) is the same as the central line of the secondary final-stage silicon steel sheet (5) of the main column during assembly; and respectively assembling a third compensation copper plate (2.3) at the joint of the fourth compensation copper plate (2.4) and the first compensation copper plate (2.1), the joint of the first compensation copper plate (2.1) and the fifth compensation copper plate (2.5) and the joint of the fifth compensation copper plate (2.5) and the second compensation copper plate (2.2).
5. A method for reducing additional losses of a converter transformer according to claim 4, characterized in that the compensating insulating plate (1) is adapted to the compensating copper plate (2), and the sum of the thickness of the compensating insulating plate (1) and the thickness of the compensating copper plate (2) is the same as the thickness of the last silicon steel sheet on the net side and the valve side.
6. A method for reducing additional loss of a converter transformer according to claim 1, characterized in that the upper copper core plates are assembled by a first upper copper core plate (3.1), a second upper copper core plate (3.2), a third upper copper core plate (3.3) and a fourth upper copper core plate (3.4), the first upper copper core plate (3.1) is an L-shaped copper plate, and the first upper copper core plate (3.1) connects the upper core tie plate (7) and the fourth upper copper core plate (3.4); the second upper iron core copper plate (3.2) is an L-shaped copper plate, the second upper iron core copper plate (3.2) is connected with the upper part (7) of the iron core pulling plate and a third upper iron core copper plate (3.3), the length of the third upper iron core copper plate (3.3) is matched with the distance M0 between the two main columns, and the width of the third upper iron core copper plate (3.3) is 50-100 mm; the length of the fourth upper iron core copper plate (3.4) is matched with the distance M0' between the main column and the side column, and the width of the fourth upper iron core copper plate (3.4) is 50-100 mm.
7. A method for reducing the parasitic loss of a converter transformer according to claim 6, characterized in that the first upper copper core plate (3.1), the second upper copper core plate (3.2), the third upper copper core plate (3.3) and the fourth upper copper core plate (3.4) are assembled by means of metal fasteners so that the upper copper core plates and the core pulling plate (6) are an equipotential whole.
8. The method for reducing the parasitic loss of the converter transformer according to claim 7, wherein the lower copper core plates are assembled by a first lower copper core plate (4.1), a second lower copper core plate (4.2), a third lower copper core plate (4.3) and a fourth upper copper core plate (4.4), and the sizes of the components of the lower copper core plate are the same as those of the upper copper core plate, and the first lower copper core plate (4.1), the second lower copper core plate (4.2), the third lower copper core plate (4.3) and the fourth upper copper core plate (4.4) are assembled by metal fasteners, so that the lower copper core plate and the core pulling plate (6) are an equipotential whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211044106.2A CN115312308A (en) | 2022-08-29 | 2022-08-29 | Method for reducing additional loss of converter transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211044106.2A CN115312308A (en) | 2022-08-29 | 2022-08-29 | Method for reducing additional loss of converter transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115312308A true CN115312308A (en) | 2022-11-08 |
Family
ID=83865559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211044106.2A Pending CN115312308A (en) | 2022-08-29 | 2022-08-29 | Method for reducing additional loss of converter transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115312308A (en) |
-
2022
- 2022-08-29 CN CN202211044106.2A patent/CN115312308A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20180137967A1 (en) | High Frequency Transformer | |
| US5341281A (en) | Harmonic compensator using low leakage reactance transformer | |
| US4488136A (en) | Combination transformer with common core portions | |
| US20020018327A1 (en) | Multi-winding fault-current limiter coil with flux shaper and cooling for use in an electrical power transmission/distribution application | |
| US8629746B2 (en) | High frequency transformers | |
| US6661327B1 (en) | Electromagnetic inductor and transformer device and method making the same | |
| US4485368A (en) | Electrical shunt reactor coil | |
| US3509507A (en) | Grounded y - y three-phase transformer | |
| CN115312308A (en) | Method for reducing additional loss of converter transformer | |
| CN101373655A (en) | Iron core reactor | |
| US2758144A (en) | Compensation means in three-phase electric arc furnace | |
| KR101131586B1 (en) | Resonator for magnetic resonance power transmission device using current source input | |
| US5705971A (en) | Low leakage coaxial transformers | |
| US10283260B2 (en) | Transformer for reducing eddy current losses of coil | |
| CN101373659A (en) | Coil-out apparatus of reactor coil and iron core reactor containing the same | |
| CN101373656B (en) | Double-body structure of reactor | |
| US3621427A (en) | Electrical reactor | |
| EP3054464A1 (en) | Coupling coil structure and transformer | |
| US20230230762A1 (en) | High frequency medium voltage transformer with central insulating divider | |
| US7843299B2 (en) | Inductive devices and transformers utilizing the tru-scale reactance transformation system for improved power systems | |
| JPS63274371A (en) | Switching regulator | |
| CN215643958U (en) | Box edge vortex bypass device | |
| CN112530676B (en) | Double-iron-core transformer | |
| CN209401457U (en) | A kind of high power three-phase furnace transformer | |
| JPS5946406B2 (en) | stationary induction equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |