CN211907208U - Large capacity resin casting dry type converter transformer complete equipment - Google Patents
Large capacity resin casting dry type converter transformer complete equipment Download PDFInfo
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- CN211907208U CN211907208U CN202020261884.7U CN202020261884U CN211907208U CN 211907208 U CN211907208 U CN 211907208U CN 202020261884 U CN202020261884 U CN 202020261884U CN 211907208 U CN211907208 U CN 211907208U
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Abstract
The utility model relates to a large-capacity resin-cast dry-type converter transformer complete device, belonging to the technical field of transformers, comprising a large-capacity resin-cast dry-type converter transformer and a soft start cabinet; a grounding resistor cabinet and a box-type transformer substation; the high-capacity resin-cast dry-type converter transformer comprises a bracket, an iron core and three-phase coils, wherein the iron core is of a three-phase three-column iron core structure, and a primary coil and a secondary coil are sequentially wound on each column of iron core from inside to outside; the primary coil and the secondary coil are respectively wound together by two independent coils in the radial direction; two independent coils are respectively led out of the terminals and are connected in parallel up and down outside the coils; the inlet wire of the soft start cabinet is connected with an external bridge frame through a high-voltage wall bushing, and the outlet wire end of the soft start cabinet is connected with the primary side of the large-capacity resin-cast dry-type converter transformer through the high-voltage wall bushing and a cable or a busbar; the grounding resistance cabinet is placed on the primary side of the box-type transformer substation, and a neutral point on the primary side is connected with the grounding resistance cabinet through a cable or a busbar.
Description
Technical Field
The utility model belongs to the technical field of the transformer, concretely relates to large capacity resin pouring dry-type converter transformer integrated equipment.
Background
As is well known, a Converter Transformer (Converter Transformer) is a power Transformer connected between a Converter bridge and an ac system. And the converter transformer is adopted to realize the connection of the converter bridge and the alternating current bus and provide a three-phase commutation voltage with ungrounded neutral point for the converter bridge. The converter transformer and the converter bridge constitute a main body of the converter unit. The converter transformer is a key device which is crucial in the ultra-high voltage direct current transmission project, and is a core device of interfaces at two ends of current conversion and inversion in an alternating current and direct current transmission system. The investment and safe operation of the system are key and important guarantees for obtaining power generation benefits in engineering. The converter transformer is required to have higher reliability and technical performance due to the key function. Because of the combined action of the alternating current electric field, the direct current electric field and the magnetic field, the converter transformer has special and complex structure, high key technology and strict requirements on manufacturing environment and processing quality. At present, the maximum capacity and the voltage grade of a dry-type transformer are limited, so that the oil-immersed converter transformer is more in the industry. The insulation structure design of the large-capacity resin-cast dry-type converter transformer and the structure design of the box-type transformer substation are the problems which are mainly solved by technical personnel in the field under the combined action of an alternating current electric field, a direct current electric field and a magnetic field of the large-capacity resin-cast dry-type converter transformer in the air.
SUMMERY OF THE UTILITY MODEL
The utility model provides a large capacity resin pouring dry-type converter transformer complete equipment for solving the technical problem existing in the prior art.
The utility model aims at providing a large capacity resin pouring dry-type converter transformer integrated equipment includes at least:
a resin-cast dry-type converter transformer (12) having a capacity of not less than 10000 kVA;
a soft start cabinet (5) for controlling the working state of the high-capacity resin-cast dry converter transformer (12);
a grounding resistance cabinet (8) and a box-type transformer substation (7); wherein:
the large-capacity resin-cast dry-type converter transformer (12), the soft start cabinet (5) and the grounding resistance cabinet (8) are positioned in the box-type transformer substation (7);
the high-capacity resin-cast dry-type converter transformer (12) comprises a support (1), an iron core (2) and three-phase coils, wherein the iron core (2) is of a three-phase three-column iron core structure, and a primary coil (3) and a secondary coil (4) are sequentially wound on each column of iron core from inside to outside; the primary coil (3) and the secondary coil (4) are respectively wound together by two independent coils in the radial direction; two independent coils are respectively led out of the terminals and are connected in parallel up and down outside the coils;
the soft start cabinet (5) is positioned in a bulkhead of a box-type transformer substation (7), the incoming line of the soft start cabinet (5) is connected with an external bridge through a high-voltage wall bushing (6), and the outgoing line end of the soft start cabinet (5) is connected with the primary side of a large-capacity resin-cast dry-type converter transformer (12) through the high-voltage wall bushing (6) through a cable or a busbar;
the grounding resistor cabinet (8) is placed on the primary side of the box-type transformer substation (7), and a neutral point on the primary side is connected with the grounding resistor cabinet (8) through a cable or a busbar.
Further, a shield member (11) is attached to an inner wall of the box-type substation (7).
Further, the shielding member (11) is a magnetic shielding member or a current shielding member.
Furthermore, an exhaust fan (9) is arranged at the upper part of the box-type substation (7).
Further, a louver (10) is provided at the lower portion of the box-type substation (7).
The utility model has the advantages and positive effects that:
by adopting the technical scheme, the utility model discloses a capacity is greater than 10000 kVA's resin casting dry-type converter transformer market demand, has filled the blank of domestic large capacity resin casting dry-type converter transformer;
secondly, because the utility model adopts the layout structure and the connection relationship, the overall layout is compact; the operation and the use are simple and convenient, and the occupied area is reduced;
thirdly, because the utility model discloses box-type substation installs the soft start additional to having carried out the lobe to the soft start and having handled, having blocked the heat that gives off when the transformer operation to the influence of soft start, install soft start current limiting device additional and strikeed and mechanical shock to the electric current of transformer when having reduced the start greatly.
Fourthly, because the shielding component is arranged on the inner wall of the box-type substation, the additional losses of eddy current, magnetic hysteresis and the like on the leakage flux entering structural component are reduced, and the stability of internal devices and the box-type substation is improved;
fifthly, because the utility model discloses be provided with the exhaust fan on box-type substation's upper portion the lower part of box-type substation (7) is provided with the shutter, consequently accelerates the inside and outside air cycle mobility of box-type substation, has effectively improved box-type substation's inside electrical component's radiating efficiency, has guaranteed the safe normal operating of whole device.
Drawings
FIG. 1 is a front view of a preferred embodiment of the present invention;
FIG. 2 is a top view of a preferred embodiment of the present invention;
fig. 3 is a right side view of the preferred embodiment of the present invention;
FIG. 4: is the front view of the box-type substation in the preferred embodiment of the invention.
Wherein: 1. a support; 2. an iron core; 3. a primary coil; 4. a secondary coil; 5. a soft start cabinet; 6. a high voltage wall bushing; 7. a box-type substation; 8. a grounding resistor cabinet; 9. an exhaust fan; 10. a blind window; 11. a shielding member; 12. a large-capacity resin-cast dry-type transformer.
Detailed Description
For further understanding of the contents, features and effects of the present invention, the following embodiments are exemplified and will be described in detail with reference to the accompanying drawings:
as shown in fig. 1 to 4, the technical solution of the present invention is:
a large-capacity resin-cast dry-type converter transformer complete device comprises a large-capacity resin-cast dry-type converter transformer 12, a soft start cabinet 5, a grounding resistance cabinet 8 and a box-type transformer substation 7, wherein the large-capacity resin-cast dry-type converter transformer 12, the soft start cabinet 5 and the grounding resistance cabinet 8 are all placed in the box-type transformer substation 7. The large-capacity resin-cast dry-type converter transformer 12 comprises a support 1, an iron core 2 and coils, wherein the coils are three-phase, the iron core 2 is of a three-phase three-column iron core structure, and a primary coil 3 and a secondary coil 4 are sequentially arranged on each column of iron core from inside to outside; the primary coil 3 and the secondary coil 4 are respectively wound together by two independent coils in the radial direction; two independent coils are respectively led out of the terminals and are connected in parallel up and down outside the coils. The soft start cabinet 5 is placed in a bulkhead of a box-type substation 7, an incoming line is connected with an external bridge through a high-voltage wall bushing 6, and a leading-out end of the soft start cabinet 5 is connected with a primary side of a high-capacity resin-cast dry-type converter transformer 12 through the high-voltage wall bushing 6 and a cable or a busbar. The grounding resistance cabinet 8 is placed on the primary side of the box-type substation 7, and a neutral point on the primary side is connected with the grounding resistance cabinet 8 through a cable or a busbar. The box-type substation 7 is placed in an outdoor environment, a large-capacity resin-cast dry-type converter transformer 12, a soft start cabinet 5 and a grounding resistance cabinet 8 are arranged in the box-type substation, an exhaust fan 9 is arranged at the upper part of the box-type substation 7, a shutter 10 is arranged at the lower part of the box-type substation 7, and a magnetic shield or a current shield 11 is additionally arranged on the inner wall of the box-type substation 7.
The working principle of the preferred embodiment is as follows:
the converter transformer is a power transformer connected between a converter bridge and an alternating current system, 10kV alternating current is connected into the system from a power grid, the primary side of a high-capacity resin-cast dry-type converter transformer 12 is connected into the system through a soft start cabinet 5, and the secondary side of the system is connected with a power grid side to simulate a flexible direct power transmission MMC system. When the large-capacity resin-cast dry-type converter transformer 12 is started, a large exciting current can be generated, and the soft start cabinet 5 is used for limiting the current impact and the mechanical impact of the exciting current on the transformer. The primary side neutral point of the large-capacity resin-cast dry-type converter transformer 12 is grounded 8 through a grounding resistor cabinet to limit grounding current and prevent various overvoltage hazards. The box-type substation 7 is installed outdoors, considers the outdoor service environment and the particularity of converter transformer, installs electric shield or magnetic screen 11 additional at 7 inner walls of box-type substation, calculates through the transformer heat dissipation, and exhaust fan 9 is installed additional on upper portion, and shutter 10 is installed additional to the lower part, guarantees the radiating efficiency of device.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all the modifications and equivalents of the technical spirit of the present invention to any simple modifications of the above embodiments are within the scope of the technical solution of the present invention.
Claims (5)
1. A large capacity resin casting dry type converter transformer complete equipment is characterized by at least comprising:
a large-capacity resin-cast dry-type converter transformer (12) with the capacity not less than 10000 kVA;
a soft start cabinet (5) for controlling the working state of the high-capacity resin-cast dry converter transformer (12);
a grounding resistance cabinet (8) and a box-type transformer substation (7); wherein:
the large-capacity resin-cast dry-type converter transformer (12), the soft start cabinet (5) and the grounding resistance cabinet (8) are positioned in the box-type transformer substation (7);
the high-capacity resin-cast dry-type converter transformer (12) comprises a support (1), an iron core (2) and three-phase coils, wherein the iron core (2) is of a three-phase three-column iron core structure, and a primary coil (3) and a secondary coil (4) are sequentially wound on each column of iron core from inside to outside; the primary coil (3) and the secondary coil (4) are respectively wound together by two independent coils in the radial direction; two independent coils are respectively led out of the terminals and are connected in parallel up and down outside the coils;
the soft start cabinet (5) is positioned in a bulkhead of a box-type transformer substation (7), the incoming line of the soft start cabinet (5) is connected with an external bridge through a high-voltage wall bushing (6), and the outgoing line end of the soft start cabinet (5) is connected with the primary side of a large-capacity resin-cast dry-type converter transformer (12) through the high-voltage wall bushing (6) through a cable or a busbar;
the grounding resistor cabinet (8) is placed on the primary side of the box-type transformer substation (7), and a neutral point on the primary side is connected with the grounding resistor cabinet (8) through a cable or a busbar.
2. A large capacity resin-cast dry converter transformer kit according to claim 1, characterized in that a shielding member (11) is installed on the inner wall of the box-type substation (7).
3. The large capacity resin-cast dry type converter transformer kit according to claim 2, wherein the shielding member (11) is a magnetic shielding member or a current shielding member.
4. A high capacity resin-cast dry converter transformer kit according to any of claims 1-3, characterized in that an exhaust fan (9) is provided at the upper part of the box substation (7).
5. A high capacity resin-cast dry converter transformer kit according to any of claims 1-3, characterized in that shutters (10) are provided at the lower part of the box substation (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020261884.7U CN211907208U (en) | 2020-03-05 | 2020-03-05 | Large capacity resin casting dry type converter transformer complete equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020261884.7U CN211907208U (en) | 2020-03-05 | 2020-03-05 | Large capacity resin casting dry type converter transformer complete equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211907208U true CN211907208U (en) | 2020-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020261884.7U Active CN211907208U (en) | 2020-03-05 | 2020-03-05 | Large capacity resin casting dry type converter transformer complete equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211907208U (en) |
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2020
- 2020-03-05 CN CN202020261884.7U patent/CN211907208U/en active Active
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