CN217445081U - System for improving power reliability of auxiliary equipment of large transformer - Google Patents
System for improving power reliability of auxiliary equipment of large transformer Download PDFInfo
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- CN217445081U CN217445081U CN202221350876.5U CN202221350876U CN217445081U CN 217445081 U CN217445081 U CN 217445081U CN 202221350876 U CN202221350876 U CN 202221350876U CN 217445081 U CN217445081 U CN 217445081U
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Abstract
The utility model discloses a system for improve large-scale transformer auxiliary assembly power reliability, medium-pressure mill is with distribution A section through first feeder switch, mill is with becoming A and second feeder switch and low-pressure mill is with distribution A section and is connected, medium-pressure mill is with distribution B section through third feeder switch, mill is with becoming B and fourth feeder switch and low-pressure mill is with distribution B section and is connected, low-pressure mill is with distribution A section through fifth feeder switch and dual supply switching module's first input is connected, low-pressure mill is with distribution B section through sixth feeder switch and dual supply switching module's second input is connected, dual supply switching module's output and transformer auxiliary assembly unit, this system can effectively solve the single problem of large-scale transformer auxiliary assembly power, and the reliability is higher.
Description
Technical Field
The utility model belongs to transformer operation overhauls the field, relates to a system for improve large-scale transformer auxiliary assembly power reliability.
Background
The large transformer is used as an important component of a power system, and provides reliable and uninterrupted energy in the national economic development process. Since transformers are operated at full load for the most part of the time, it has been very important that the auxiliary equipment during operation of the transformer operates properly and reliably.
The defects and shortcomings of the prior art are as follows:
at present, most of power supplies of auxiliary equipment of large transformers are independently designed to be connected with a station-used low-voltage distribution section, and most of auxiliary equipment except a cooling system is not designed with a standby power supply. This results in the loss of power to the low voltage distribution section that supplies power to certain ancillary equipment of the large transformer, which will not operate properly. For example, the neutral grounding knife switch of the transformer cannot be operated after power failure; the transformer oil temperature and the transformer running temperature cannot be monitored by operators after the winding temperature transmitter loses power; the on-load voltage regulation device cannot regulate the service voltage after losing power, so that the service auxiliary machine trips to further trigger the unit to trip; the oil quality of the transformer can not be monitored after the transformer oil chromatographic monitoring system loses power.
Although two paths of mutually standby power supplies are designed for the cooling system of the transformer, the cooling system can be started after the transformer is put into operation. Because the transformer is not allowed to operate for more than 1 hour when the cooling system is completely stopped, if the cooling system cannot be started after the transformer is put into operation, the transformer needs to be immediately scheduled to quit the defect of processing after the transformer is operated, and therefore the reliability is poor.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a system for improving large-scale transformer auxiliary assembly power reliability, this system can effectively solve the single problem of large-scale transformer auxiliary system power, and the reliability is higher.
In order to achieve the above purpose, the system for improving the power reliability of the auxiliary equipment of the large-scale transformer comprises a station-service power distribution unit, a double-power switching device and an auxiliary equipment unit of the transformer;
the station power distribution unit comprises a low-voltage station power distribution A section, a low-voltage station power distribution B section, a medium-voltage station power distribution A section, a medium-voltage station power distribution B section, a station transformer A and a station transformer B, wherein the low-voltage station power distribution A section and the low-voltage station power distribution B section are taken from different medium-voltage station power distribution sections; the dual-power switching device comprises a first feeder switch, a second feeder switch, a third feeder switch, a fourth feeder switch, a fifth feeder switch, a sixth feeder switch and a dual-power switching module;
the power distribution A section for the medium-voltage plant is connected with the power distribution A section for the low-voltage plant through a first feeder switch, the power substation A and a second feeder switch, the power distribution B section for the medium-voltage plant is connected with the power distribution B section for the low-voltage plant through a third feeder switch, the power substation B and a fourth feeder switch, the power distribution A section for the low-voltage plant is connected with a first input end of a dual-power switching module through a fifth feeder switch, the power distribution B section for the low-voltage plant is connected with a second input end of the dual-power switching module through a sixth feeder switch, and an output end of the dual-power switching module is connected with the transformer auxiliary equipment unit.
The transformer auxiliary equipment unit comprises a transformer auxiliary equipment power distribution section and transformer auxiliary equipment, the output end of the dual-power switching module is connected with the transformer auxiliary equipment power distribution section, and the transformer auxiliary equipment power distribution section is connected with the transformer auxiliary equipment.
The transformer auxiliary equipment comprises a transformer cooling system, a transformer neutral point grounding system, a transformer on-load voltage regulation system, a transformer on-line monitoring system, a transformer oil surface temperature monitoring system and a transformer winding temperature monitoring system.
The low-voltage station power distribution A section and the low-voltage station power distribution B section are taken from different medium-voltage station power distribution sections.
The utility model discloses following beneficial effect has:
improve system of large-scale transformer auxiliary assembly power reliability when concrete operation, connect two independent road power through dual power supply switching module, wherein, when arbitrary road power breaks down, then dual power supply switching module breaks off fast to drop into not breaking down all the way, thereby improve the reliability of transformer auxiliary assembly power by a wide margin, avoid leading to the unable normal operating of certain transformer auxiliary assembly because of a certain station-service distribution section loses the electricity, and then lead to the transformer need withdraw from the operation, moreover, the steam generator is simple in structure, high durability and convenient operation.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood, the following figures in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments, and do not limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
The structural schematic according to the disclosed embodiment of the invention is shown in the attached drawings. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
Referring to fig. 1, the system for improving the reliability of power supply of large transformer auxiliary equipment comprises a station power distribution unit, a dual power switching device and a transformer auxiliary equipment unit.
The power station power distribution unit comprises a low-voltage power station power distribution A section L3, a low-voltage power station power distribution B section L4, a medium-voltage power station power distribution A section L1, a medium-voltage power station power distribution B section L2, a power station transformer AT1 and a power station transformer BT2, wherein the low-voltage power station power distribution A section L3 and the low-voltage power station power distribution B section L4 are taken from different medium-voltage power station power distribution sections.
The dual-power switching device comprises a first feeder switch K1, a second feeder switch K2, a third feeder switch K3, a fourth feeder switch K4, a fifth feeder switch K5, a sixth feeder switch K6 and a dual-power switching module K7.
The transformer auxiliary equipment unit comprises a transformer auxiliary equipment power distribution section L5 and transformer auxiliary equipment W, and the transformer auxiliary equipment W comprises a transformer cooling system, a transformer neutral point grounding system, a transformer on-load voltage regulation system, a transformer on-line monitoring system, a transformer oil surface temperature monitoring system and a transformer winding temperature monitoring system.
Wherein, the medium-voltage station service power distribution A section L1 is connected with the low-voltage station service power distribution A section L3 through a first feeder switch K1, a station service transformer AT1 and a second feeder switch K2, the medium-voltage station service power distribution B section L2 is connected with the low-voltage station service power distribution B section L4 through a third feeder switch K3, a station service transformer BT2 and a fourth feeder switch K4, the low-voltage station service power distribution A section L3 is connected with a first input end of a dual-power switching module K7 through a fifth feeder switch K5, the low-voltage station service power distribution B section L4 is connected with a second input end of the dual-power switching module K7 through a sixth feeder switch K6, an output end of the dual-power switching module K7 is connected with a transformer auxiliary equipment power distribution section L5, the transformer auxiliary equipment power distribution section L5, a transformer cooling system, a transformer neutral point grounding system, a transformer on-load voltage regulation system, a transformer on-line monitoring system, a transformer oil surface temperature monitoring system and a transformer winding temperature monitoring system.
When the dual power switching module K7 switches on the first input end of the dual power switching module K7 and the lower port of the fifth feeder switch K5, the low-voltage station service power distribution a section L3 supplies power to the transformer auxiliary equipment power distribution section L5 through the fifth feeder switch K5. At this time, when the low-voltage station service power distribution A section L3 loses power or the fifth feeder switch K5 steals and jumps, the dual-power switching module K7 automatically cuts off the connection with the lower port of the fifth feeder switch K5, the connection between the second input end of the dual-power switching module K7 and the lower port of the sixth feeder switch K6 is conducted, and the normal operation of the transformer auxiliary device W is ensured.
When the dual power supply switching module K7 switches on the second input end of the dual power supply switching module K7 and the lower port of the sixth feeder switch K6, the low-voltage station service power distribution B-section L4 supplies power to the transformer auxiliary equipment power distribution section L5 through the sixth feeder switch K6. At this time, when the low-voltage station service power distribution B section L4 loses power or the sixth feeder switch K6 steals and jumps, the dual-power switching module K7 automatically cuts off the connection between the dual-power switching module and the lower port of the sixth feeder switch K6, and the connection between the first input end of the dual-power switching module K7 and the lower port of the fifth feeder switch K5 is conducted, so that the normal operation of the transformer auxiliary device W is ensured.
Claims (9)
1. A system for improving the reliability of a power supply of auxiliary equipment of a large transformer is characterized by comprising a station-service power distribution unit, a double-power switching device and an auxiliary equipment unit of the transformer;
the station power distribution unit comprises a low-voltage station power distribution A section (L3), a low-voltage station power distribution B section (L4), a medium-voltage station power distribution A section (L1), a medium-voltage station power distribution B section (L2), a station transformer A (T1) and a station transformer B (T2), wherein the low-voltage station power distribution A section (L3) and the low-voltage station power distribution B section (L4) are taken from different medium-voltage station power distribution sections; the dual-power switching device comprises a first feeder switch (K1), a second feeder switch (K2), a third feeder switch (K3), a fourth feeder switch (K4), a fifth feeder switch (K5), a sixth feeder switch (K6) and a dual-power switching module (K7);
the medium-voltage station-use power distribution A section (L1) is connected with the low-voltage station-use power distribution A section (L3) through a first feeder switch (K1), a station-use substation A (T1) and a second feeder switch (K2), the medium-voltage station-use power distribution B section (L2) is connected with the low-voltage station-use power distribution B section (L4) through a third feeder switch (K3), a station-use substation B (T2) and a fourth feeder switch (K4), the low-voltage station-use power distribution A section (L3) is connected with a first input end of a dual-power-supply switching module (K7) through a fifth feeder switch (K5), the low-voltage station-use power distribution B section (L4) is connected with a second input end of the dual-power-supply switching module (K7) through a sixth feeder switch (K6), and an output end of the switching module (K7) is connected with the transformer auxiliary equipment unit.
2. The system for improving power reliability of large transformer auxiliary equipment according to claim 1, wherein the transformer auxiliary equipment unit comprises a transformer auxiliary equipment power distribution section (L5) and a transformer auxiliary equipment (W), the output end of the dual power supply switching module (K7) is connected with the transformer auxiliary equipment power distribution section (L5), and the transformer auxiliary equipment power distribution section (L5) is connected with the transformer auxiliary equipment (W).
3. System for improving the reliability of power supplies for large transformer auxiliaries according to claim 2, characterized in that the transformer auxiliaries (W) are transformer cooling systems.
4. System for improving the reliability of power supply to large transformer auxiliary equipment according to claim 2, characterized in that the transformer auxiliary equipment (W) is a transformer neutral grounding system.
5. System for improving the power supply reliability of large transformer auxiliary equipment according to claim 2, characterized in that the transformer auxiliary equipment (W) is a transformer on-load tap changing system.
6. The system for improving the power supply reliability of the auxiliary equipment of the large-scale transformer according to claim 2, characterized in that the auxiliary equipment (W) of the transformer is an online transformer monitoring system.
7. The system for improving the power reliability of the auxiliary equipment of the large-scale transformer according to claim 2, wherein the auxiliary equipment (W) of the large-scale transformer is a transformer oil surface temperature monitoring system.
8. The system for improving power reliability of the auxiliary equipment of the large-scale transformer according to claim 2, characterized in that the auxiliary equipment (W) of the transformer is a transformer winding temperature monitoring system.
9. The system for improving power supply reliability of large transformer auxiliaries according to claim 1, wherein the low-voltage station distribution A section (L3) and the low-voltage station distribution B section (L4) are taken from different medium-voltage station distribution sections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221350876.5U CN217445081U (en) | 2022-05-31 | 2022-05-31 | System for improving power reliability of auxiliary equipment of large transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221350876.5U CN217445081U (en) | 2022-05-31 | 2022-05-31 | System for improving power reliability of auxiliary equipment of large transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217445081U true CN217445081U (en) | 2022-09-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221350876.5U Active CN217445081U (en) | 2022-05-31 | 2022-05-31 | System for improving power reliability of auxiliary equipment of large transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217445081U (en) |
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2022
- 2022-05-31 CN CN202221350876.5U patent/CN217445081U/en active Active
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