Excitation dry type transformer and bus emergency drying system and use method thereof

Abstract

The invention relates to the technical field of excitation system drying, in particular to an excitation dry-type transformer and bus emergency drying system and a using method thereof.The excitation dry-type transformer and bus emergency drying system comprises an internal heat dissipation system and an external drying system, the internal heat dissipation system is arranged in an excitation dry-type transformer, and the external drying system is arranged in the excitation dry-type transformer. The external drying system is arranged outside the excitation dry-type transformer, the internal heat dissipation system is used for conducting heat dissipation on the excitation dry-type transformer, and the external drying system is used for drying the excitation dry-type transformer and a low-voltage side bus and assisting or replacing the internal heat dissipation system to conduct heat dissipation on the excitation dry-type transformer. The requirements of the excitation system for heat dissipation and drying are met at the same time, and water drops can be prevented from being sucked in the drying process.

Description

Technical Field

[0001] The present invention relates to the technical field of excitation system drying, and in particular to an excitation dry-type transformer and busbar emergency drying system and a use method thereof. Background Art

[0002] When high-voltage equipment is operating normally, the heat generated by the thermal effect of the current makes it less likely to get damp and the insulation is less likely to have problems. However, once the equipment is stopped for maintenance for a period of time, when the insulation is measured before power is supplied, the insulation is often reduced, even so low that it does not meet the power supply conditions, thus affecting the startup speed. Moreover, with changes in external temperature, such as high temperatures in summer, coupled with high heat generation due to high dry-type variable loads, the factory fan configuration cannot fully meet the heat dissipation requirements, and the temperature may be higher during actual operation. Summary of the invention

[0003] The purpose of the present invention is to address the defects of the prior art and provide an excitation dry-type transformer and busbar emergency drying system and a method of using the same, which simultaneously meets the requirements of the excitation system for heat dissipation and drying and can avoid the inhalation of water droplets during the drying process.

[0004] In order to solve the above technical problems, in a first aspect, the present invention provides an excitation dry-type transformer and busbar emergency drying system, comprising an internal heat dissipation system and an external drying system, wherein the internal heat dissipation system is arranged inside the excitation dry-type transformer, and the external drying system is arranged outside the excitation dry-type transformer, the internal heat dissipation system is used to dissipate heat from the excitation dry-type transformer, and the external drying system is used to dry the excitation dry-type transformer and the low-voltage side busbar, and to assist or replace the internal heat dissipation system in dissipating heat from the excitation dry-type transformer.

[0005] In some embodiments, the external drying system includes an external fan, a heater and an air supply duct, the external fan is provided with an air intake and an air outlet, the air outlet of the external fan is connected to the heater, one end of the air supply duct is connected to the heater, and the other end of the air supply duct is connected to the housing of the excitation dry-type transformer, so that the airflow of the external fan is heated by the heater and then blown into the excitation dry-type transformer.

[0006] In some embodiments, a suction head is provided on the suction port of the external fan, a hole is opened on the outer surface of the suction head, and a rainproof eaves is provided on the top of the suction head.

[0007] In some embodiments, a filter is provided at the opening of the air suction head.

[0008] In some embodiments, a magnetic strip is provided on the filter, and the filter is adhered to the air suction head through the magnetic strip.

[0009] In some embodiments, a vent is provided on the housing of the excitation dry-type transformer, and the vent can be opened or closed.

[0010] In some embodiments, the shell includes a plurality of columns, and a shutter is arranged between two adjacent columns. The shutter includes a plurality of shutters and a window rod. The plurality of shutters are arranged perpendicular to the columns, and the vents are formed between the plurality of shutters. The window rod is used to control the simultaneous rotation of the plurality of shutters, thereby realizing the opening or closing of the vents.

[0011] In some embodiments, the shell includes a first shell and a second shell, the vent is opened on the first shell, a track is set on the first shell, the second shell is slidably set on the track and arranged parallel to the first shell, and a connecting port corresponding to the vent is set on the second shell. The connecting port is aligned or misaligned with the vent by sliding the second shell, thereby realizing the opening or closing of the vent.

[0012] In some embodiments, the track is L-shaped and is disposed at the upper end and the lower end of the first shell.

[0013] In a second aspect, the present invention provides a method for using an excitation dry-type transformer and a busbar emergency drying system, comprising:

[0014] When the excitation system operates normally, the internal cooling system operates to dissipate heat. When the temperature is higher than the high temperature threshold, the external fan of the external drying system is turned on as a supplementary cooling method.

[0015] When the internal cooling system is under maintenance, the external fan of the external drying system is temporarily turned on to replace the stopped internal cooling system;

[0016] When it is necessary to dry the excitation dry-type transformer and the low-voltage busbar, turn on the external fan and heater of the external drying system and close the vents on the shell to remove moisture from the excitation dry-type transformer and the low-voltage busbar at the same time.

[0017] The beneficial effects of the present invention are:

[0018] 1. The present invention retains the original internal heat dissipation system in the excitation system and adds an external drying system outside the excitation system, so that when the excitation dry-type transformer and the low-voltage side bus need to be dried, the external drying system can be turned on to drive out moisture from the excitation dry-type transformer and the low-voltage side bus. When the temperature of the excitation dry-type transformer is high, the external drying system can assist the internal heat dissipation system to increase the heat dissipation effect. When the internal heat dissipation system is under maintenance, the external drying system can replace the stopped internal heat dissipation system.

[0019] 2. The present invention provides an air suction head on the air suction port of the external fan, and the air suction head is provided with a rainproof eaves, thereby preventing the external fan from sucking external rainwater into the excitation dry-type transformer.

[0020] 3. A filter is provided at the opening of the air suction head of the present invention to prevent water droplets or other impurities from being sucked into the external fan.

[0021] 4. The present invention provides switchable vents on the housing so that when the excitation dry-type transformer and the low-voltage busbar need to be dried, the vents can be closed to improve the drying effect of the low-voltage busbar. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the air suction head of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the housing of the present invention;

[0024] Figure 3 It is a connection diagram of the excitation dry-type transformer and the excitation regulating cabinet of the present invention.

[0025] Figure numerals: first shell 1; second shell 2; ventilation port 3; connecting port 4; air suction head 5; rainproof eaves 6; excitation dry-type transformer 7; excitation regulating cabinet 8; low-voltage side bus 9; high-voltage side bus 10; pot insulator 11; track 12; handle 13. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0027] The present invention provides an excitation dry-type transformer and busbar emergency drying system, comprising an internal heat dissipation system and an external drying system, wherein the internal heat dissipation system is arranged inside the excitation dry-type transformer 7, and the external drying system is arranged outside the excitation dry-type transformer 7, the internal heat dissipation system is used to dissipate heat from the excitation dry-type transformer 7, and the external drying system is used to dry the excitation dry-type transformer 7 and the low-voltage side busbar 9, and to assist or replace the internal heat dissipation system in dissipating heat from the excitation dry-type transformer 7.

[0028] It can be understood that the present invention retains the original internal heat dissipation system in the excitation system and adds an external drying system outside the excitation system, so that when the excitation dry-type transformer 7 and the low-voltage side bus 9 need to be dried, the external drying system can be turned on to drive out moisture from the excitation dry-type transformer 7 and the low-voltage side bus 9. When the temperature of the excitation dry-type transformer 7 is high, the external drying system can assist the internal heat dissipation system to increase the heat dissipation effect. When the internal heat dissipation system is overhauled, the external drying system can replace the shut-down internal heat dissipation system; thereby solving the problem of heat dissipation of the excitation dry-type transformer 7 and drying of the excitation dry-type transformer 7 and the low-voltage side bus 9.

[0029] In some embodiments, the external drying system includes an external fan, a heater, and an air supply duct. The external fan is provided with an air inlet and an air outlet. The air outlet of the external fan is connected to the heater. One end of the air supply duct is connected to the heater, and the other end of the air supply duct is connected to the housing, so that the wind flow of the external fan is heated by the heater and then blown into the excitation dry-type transformer 7. The external fan draws in external air, and the external air is heated by the heater and then enters the excitation dry-type transformer 7 through the air supply duct, thereby drying the winding core in the excitation dry-type transformer 7.

[0030] In order to prevent external rain and snow from entering the excitation dry-type transformer 7, Figure 1 As shown, in some embodiments, a suction head 5 is provided on the suction port of the external fan, the outer surface of the suction head 5 is opened, and a rainproof eave 6 is provided on the top of the suction head 5. A flange is provided on the left side of the suction head 5, and one end of the suction head 5 is connected to the suction port of the external fan through the flange. The rainproof eave 6 is welded to the top of the suction head 5, and the rainproof eave 6 is arc-shaped, which completely covers the opening of the suction head 5.

[0031] In some embodiments, a filter is provided at the opening of the air suction head 5. In the case of strong winds, the filter can prevent or reduce external rainwater and impurities from entering the external fan.

[0032] In some embodiments, a magnetic strip is provided on the filter screen, and the filter screen is pasted on the air suction head 5 through the magnetic strip. The air suction head 5 is made of iron material, and the filter screen is directly pasted on the air suction head 5 through the magnetic strip, which is convenient for installation and disassembly.

[0033] like Figure 3As shown, the excitation system includes an excitation regulating cabinet 8 and an excitation dry-type transformer 7. The high-voltage side of the excitation dry-type transformer 7 is connected to a phase-separated closed bus, that is, a high-voltage side bus 10, which is separated by a pot-type insulator 11. The pipelines of the excitation dry-type transformer 7 and the high-voltage side bus 10 are not connected, and the high-voltage side bus 10 is not easy to get wet. However, the pipelines of the excitation dry-type transformer 7 and the high-voltage side bus 10 are connected, and the low-voltage side bus 9 is connected to the power cabinet of the excitation regulating cabinet 8, and this section of the pipeline is relatively long. When shutting down, the low excitation insulation is caused not only by the excitation dry-type transformer 7 but also by the low-voltage side bus 9, so it is necessary to remove the moisture from the low-voltage side bus 9. In some embodiments, a vent 3 is opened on the shell, and the vent 3 can be opened or closed.

[0034] It should be noted that, generally, the housing of the excitation dry-type transformer 7 is surrounded by ventilation and heat dissipation holes, and it is difficult for hot air to enter the pipeline of the low-voltage bus 9 to dehumidify the low-voltage bus 9, and the dehumidification efficiency of the excitation dry-type transformer 7 will also be reduced. For this reason, the vent 3 of the present invention can be opened or closed. When dehumidification is required, the vent 3 on the housing of the excitation dry-type transformer 7 is closed, so that the excitation dry-type transformer 7 and the pipeline of the low-voltage bus 9 are filled with high-temperature air, thereby improving the dehumidification effect and efficiency.

[0035] The opening and closing functions of the vent 3 of the housing can adopt various structural forms. In some embodiments, the housing includes a plurality of columns, and a shutter is arranged between two adjacent columns. The shutter includes a plurality of shutter blades and a window rod. The plurality of shutter blades are arranged perpendicular to the columns, and the vent 3 is formed between the plurality of shutter blades. The window rod is used to control the plurality of shutter blades to rotate simultaneously, thereby realizing the opening or closing of the vent 3. The shutter is a prior art and will not be described in detail here.

[0036] In some embodiments, Figure 2 As shown, the shell includes a first shell 1 and a second shell 2, the vent 3 is opened on the first shell 1, a track 12 is set on the first shell 1, the second shell 2 is slidably set on the track 12 and arranged parallel to the first shell 1, and a connecting port 4 corresponding to the vent 3 is set on the second shell 2. The connecting port 4 is aligned or misaligned with the vent 3 by sliding the second shell 2, thereby realizing the opening or closing of the vent 3.

[0037] In some embodiments, the track 12 is L-shaped, and the track 12 is disposed at the upper end and the lower end of the first shell 1 .

[0038] In some embodiments, a handle 13 is provided on the second housing 2 .

[0039] In some embodiments, the internal heat dissipation system includes a plurality of cross-flow fans, a drawer is provided at the bottom of the excitation dry-type transformer 7, the cross-flow fans are fixed in the drawer, and the cross-flow fans can be removed when the drawer is pulled out. When a cross-flow fan fails, the drawer can be pulled out, the failed cross-flow fan can be removed, and the external fan of the external drying system can be turned on to ensure the heat dissipation inside the excitation dry-type transformer 7. The specific structure of the drawer can refer to the Chinese utility model patent with the authorization announcement number CN217588666U.

[0040] Based on the above-mentioned excitation dry-type transformer and busbar emergency drying system, the present invention provides a method for using the excitation dry-type transformer and busbar emergency drying system, comprising:

[0041] When the excitation system operates normally, the internal cooling system operates to dissipate heat. When the temperature is higher than the high temperature threshold, the external fan of the external drying system is turned on as a supplementary cooling method.

[0042] When the internal cooling system is under maintenance, the external fan of the external drying system is temporarily turned on to replace the stopped internal cooling system;

[0043] When the excitation dry-type transformer 7 and the low-voltage busbar 9 need to be dried, the external fan and heater of the external drying system are turned on, and the vents 3 on the shell are closed, thereby simultaneously driving out moisture from the excitation dry-type transformer 7 and the low-voltage busbar 9.

[0044] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. An excitation dry-type transformer and busbar emergency drying system, characterized in that: The invention comprises an internal heat dissipation system and an external drying system, wherein the internal heat dissipation system is arranged inside an excitation dry-type transformer (7), and the external drying system is arranged outside the excitation dry-type transformer (7). The internal heat dissipation system is used to dissipate heat from the excitation dry-type transformer (7), and the external drying system is used to dry the excitation dry-type transformer (7) and a low-voltage side busbar (9), and to assist or replace the internal heat dissipation system in dissipating heat from the excitation dry-type transformer (7).

2. The excitation dry-type transformer and busbar emergency drying system according to claim 1 is characterized in that: The external drying system comprises an external fan, a heater and an air supply duct, wherein the external fan is provided with an air intake port and an air outlet, the air outlet of the external fan is connected to the heater, one end of the air supply duct is connected to the heater, and the other end of the air supply duct is connected to the housing of the excitation dry-type transformer (7), so that the air flow of the external fan is heated by the heater and then blown into the excitation dry-type transformer (7).

3. The excitation dry-type transformer and busbar emergency drying system according to claim 2 is characterized in that: An air suction head (5) is arranged on the air suction port of the external fan, a hole is opened on the outer surface of the air suction head (5), and a rainproof eave (6) is arranged on the top of the air suction head (5).

4. The excitation dry-type transformer and busbar emergency drying system according to claim 3 is characterized in that: A filter screen is arranged at the opening of the air suction head (5).

5. The excitation dry-type transformer and busbar emergency drying system according to claim 4 is characterized in that: A magnetic strip is arranged on the filter screen, and the filter screen is adhered to the air suction head (5) via the magnetic strip.

6. The excitation dry-type transformer and busbar emergency drying system according to any one of claims 1 to 5, characterized in that: A vent (3) is provided on the shell of the excitation dry-type transformer (7), and the vent (3) can be opened or closed.

7. The excitation dry-type transformer and busbar emergency drying system according to claim 6 is characterized in that: The shell comprises a plurality of columns, a shutter is arranged between two adjacent columns, the shutter comprises a plurality of shutter blades and a window rod, the plurality of shutter blades are arranged perpendicular to the columns, the ventilation opening (3) is formed between the plurality of shutter blades, and the window rod is used to control the plurality of shutter blades to rotate simultaneously, thereby realizing the opening or closing of the ventilation opening (3).

8. The excitation dry-type transformer and busbar emergency drying system according to claim 6 is characterized in that: The shell comprises a first shell (1) and a second shell (2); the vent (3) is provided on the first shell (1); a track (12) is arranged on the first shell (1); the second shell (2) is slidably arranged on the track (12) and is arranged parallel to the first shell (1); a connecting port (4) corresponding to the vent (3) is arranged on the second shell (2); the connecting port (4) is aligned or misaligned with the vent (3) by sliding the second shell (2), thereby realizing the opening or closing of the vent (3).

9. The excitation dry-type transformer and busbar emergency drying system according to any one of claims 1 to 5, characterized in that: The internal heat dissipation system comprises a plurality of cross-flow fans. A drawer is arranged at the bottom of the shell of the excitation dry-type transformer (7). The cross-flow fans are detachably fixed in the drawer and can be removed when the drawer is pulled out.

10. A method for using an excitation dry-type transformer and busbar emergency drying system, characterized in that: include: When the excitation system operates normally, the internal cooling system operates to dissipate heat. When the temperature is higher than the high temperature threshold, the external fan of the external drying system is turned on as a supplementary cooling method. When the internal cooling system is under maintenance, the external fan of the external drying system is temporarily turned on to replace the stopped internal cooling system; When it is necessary to dry the excitation dry-type transformer (7) and the low-voltage busbar (9), the external fan and heater of the external drying system are turned on, and the vents (3) on the housing are closed, thereby simultaneously removing moisture from the excitation dry-type transformer (7) and the low-voltage busbar (9).

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