Alternating current ice melting expansion type voltage regulating device and method for distribution line

Abstract

The invention relates to the related technical field of transformers, in particular to a distribution line alternating current ice melting expansion type voltage regulating device which comprises a transformer, a cooling mechanism is arranged on the surface of one side of the transformer, a fixing mechanism is arranged on the upper surface of the transformer, and a protection mechanism is arranged on the upper surface of the transformer. And a high-voltage terminal is fixedly mounted on the upper surface of the transformer. According to the alternating current ice melting expansion type voltage regulating device for the power distribution line, the corrugated radiator is made of a special material and has excellent heat dissipation performance, and heat dissipation holes in the surface of the corrugated radiator enable air circulation to be smoother, so that heat dissipation efficiency is improved; cooling liquid in the water tank is circularly conveyed to the corrugated radiator through the cooling pipe, heat is absorbed and taken away through flowing of the cooling liquid, then the heat flows back to the water tank through the water conveying pipe for cooling circulation, and a complete heat dissipation system is formed.

Description

Technical Field

[0001] The present invention relates to the technical field related to transformers, and in particular to an AC ice-melting expansion voltage regulating device and method for distribution lines. Background Art

[0002] As one of the main power transmission and transformation equipment in the substation, the transformer has a core position in the substation. It can also be said that the transformer is the heart of the substation. The operating status of the transformer directly affects the entire substation. Among them, large power transformers are mostly oil-immersed transformers. The characteristic of oil-immersed transformers is that oil is used as the heat dissipation and insulation medium of the transformer windings and cores. The hazards of transformers running in high temperature environments mainly include insulation damage, fire risks and a significant shortening of service life. For example, insulation damage: high temperature will cause the performance of the insulation material inside the transformer to decline, reducing its withstand voltage and mechanical strength. When the hottest point temperature of the transformer reaches At one hundred and forty degrees Celsius, bubbles will be generated in the oil, which will further reduce the insulation performance or cause flashover, thereby causing damage to the transformer. Fire risk: The oil and other organic combustibles inside the transformer are prone to fire and explosion at high temperatures. In addition, if the transformer's protection device fails or is improperly set, it is more likely to cause a fire due to overheating when encountering a short circuit or overload condition. Shortened service life: High temperature will accelerate the aging process of the transformer's insulation material and shorten its service life. High temperature environment has a great negative impact on the operating safety and life of the transformer. Therefore, there is a special need for an AC ice-melting expansion voltage regulating device for distribution lines.

[0003] However, most of the existing transformers, oil-immersed transformers, will generate heat and form high temperatures during operation. After the heat is transferred to the mineral oil, it is transferred to the box through the transformer oil, and the box is cooled by natural air. However, this heat dissipation method has a low heat dissipation efficiency. When the oil temperature rises, the cooling effect of the oil drops significantly. At this time, the operating transformer will have certain safety hazards. In addition, during long-term use, the insulating oil may crack and produce carbonaceous particles in the case of local overheating or discharge. The granular matter produced by the aging of the insulating oil may affect the normal operation of the transformer, reduce the insulation performance, and increase the risk of local discharge. In addition, when the line is covered with ice in icy and snowy weather, its load will increase and the wind-exposed area will increase. If there is strong wind, the line will dance, causing the stability and safety of the line to be threatened. Once dancing occurs, even the steel-framed power grid may suffer from broken strands, broken wires, and even collapsed towers and broken poles. In addition, line dancing may also cause phase flashover, ice flash of insulators, etc., which will have a serious impact on the safe operation of the power grid. Summary of the invention

[0004] The purpose of the present invention is to provide an AC ice melting expansion type voltage regulating device for distribution lines to solve the existing transformers proposed in the above background technology. Most oil-immersed transformers will generate heat and form high temperature during operation. After the heat is transferred to the mineral oil, it is transferred to the box through the transformer oil, and the box is cooled by natural air. However, this heat dissipation method has low heat dissipation efficiency. When the oil temperature rises, the cooling effect of the oil drops significantly. At this time, the operating transformer will have certain safety hazards. In addition, during long-term use, the insulating oil may crack and produce carbonaceous particles in the case of local overheating or discharge. The granular substances produced by the aging of the insulating oil may affect the normal operation of the transformer, reduce the insulation performance, and increase the risk of local discharge. In addition, after the line is covered with ice in ice and snow weather, its load will increase and the wind-exposed area will also increase. If strong winds are encountered, the line will dance, resulting in a threat to the stability and safety of the line. Once dancing occurs, even a steel-framed power grid may suffer from broken strands, broken wires, and even collapsed towers and broken poles. In addition, the line dancing may also cause phase flashover, ice flash of insulators, etc., which seriously affect the safe operation of the power grid.

[0005] Therefore, an object of the present invention is to provide an AC ice-melting expansion type voltage regulating device for distribution lines.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: an AC ice melting expansion type voltage regulating device for distribution lines, comprising a transformer, a cooling mechanism is arranged on one side surface of the transformer, a fixing mechanism is arranged on the upper surface of the transformer, a protection mechanism is arranged on the upper surface of the transformer, a high voltage terminal is fixedly installed on the upper surface of the transformer, a hanging plate column is fixedly installed on the upper surface of the transformer, an oil level gauge is fixedly installed on the upper surface of the transformer, and a low voltage terminal is fixedly installed on the upper surface of the transformer;

[0007] The cooling mechanism includes a corrugated radiator, heat dissipation holes, a cooling pipe, a water pump, a water pipe and a water tank. The corrugated radiator is fixedly connected to one side of the transformer, a heat dissipation hole is opened on one side surface of the corrugated radiator, a cooling pipe is penetrated and connected to the outer surface of the corrugated radiator, a water pump is fixedly connected to one side surface of the cooling pipe, a water pipe is fixedly connected to one side surface of the water pump, and a water tank is fixedly connected to one side surface of the water pipe.

[0008] As a preferred solution of the AC ice-melting expansion-type voltage regulating device for distribution lines of the present invention, the fixing mechanism includes a fixing seat, a rotating shaft, a fixing plate, a connecting rod, a connecting shaft, a fixing rod, a first spring and a clamping block, the upper surface of the transformer is fixedly connected with the fixing seat, the upper surface of the fixing seat is rotatably connected with the rotating shaft, the upper surface of the rotating shaft is fixedly connected with the fixing plate, the upper surface of the fixing plate is fixedly connected with the connecting rod, one side surface of the connecting rod is penetrated by the connecting shaft, one side surface of the connecting shaft is fixedly connected with the fixing rod, one side surface of the connecting shaft is fixedly connected with the first spring, and one side surface of the first spring is fixedly connected with a clamping block.

[0009] As a preferred solution of the AC ice-melting expansion-type voltage regulating device for distribution lines of the present invention, the protective mechanism includes a fixed column, a limiting hole, a telescopic column, a second spring and a bolt, the upper surface of the transformer is fixedly connected with the fixed column, a limiting hole is provided on one side surface of the fixed column, the inner surface of the fixed column is slidably connected with the telescopic column, one side surface of the telescopic column is fixedly connected with the second spring, and one side surface of the second spring is fixedly connected with the bolt.

[0010] As a preferred solution of the AC ice-melting expansion-type voltage-regulating device for power distribution lines of the present invention, a protective plate is fixedly connected to the upper surface of the telescopic column.

[0011] As a preferred solution of the AC ice-melting expansion type voltage regulating device for distribution lines of the present invention, a cooling pipe is fixedly connected to the surface of one side of the water pump, and a water pipe is fixedly connected to the surface of the other side of the water pump.

[0012] As a preferred solution of the AC ice-melting expansion voltage regulating device for distribution lines of the present invention, the heat dissipation holes are opened at equal intervals on one side surface of the corrugated heat sink, and the cooling pipes penetrate through the one side surfaces of multiple corrugated heat sinks.

[0013] As a preferred solution of the AC ice-melting expansion type voltage regulating device for distribution lines of the present invention, wherein: the first spring and the clamping block form a clamping structure, and the fixing seat and the rotating shaft form a rotating structure.

[0014] As a preferred solution of the AC ice-melting expansion type voltage regulating device for distribution lines of the present invention, the limiting holes are opened at equal intervals on one side surface of the fixing column, and the second spring and the clamping bolt form a telescopic structure.

[0015] As a preferred solution of the AC ice-melting expansion type voltage regulating device for distribution lines of the present invention, the inner wall size of the limiting hole matches the outer wall size of the clamp, and the fixed column and the telescopic column form a telescopic structure.

[0016] Beneficial effects of the AC ice-melting expansion-type voltage-regulating device for distribution lines of the present invention: the present invention arranges the corrugated radiator, heat dissipation holes, cooling pipes, water pumps, water pipes and water tanks, so that the heat generated by the transformer during operation can be effectively dissipated to ensure the stable operation of the equipment; the corrugated radiator is made of special materials and has excellent heat dissipation performance, and the heat dissipation holes on its surface make the air circulation smoother, thereby improving the heat dissipation efficiency. When the internal temperature of the transformer rises, the water pump starts, and the coolant in the water tank is circulated to the corrugated radiator through the cooling pipe, and the heat is absorbed and taken away by the flow of the coolant, and then returned to the water tank through the water pipe for cooling circulation, forming a complete heat dissipation system.

[0017] The beneficial effects of the AC ice-melting expansion-type voltage-regulating device for distribution lines of the present invention are as follows: through the arrangement of the fixing seat, the rotating shaft, the fixing plate, the connecting rod, the connecting shaft, the fixing rod, the first spring and the card block, the fixing position of the wire can be flexibly adjusted during the installation process, thereby enhancing the stability and adaptability of the installation; the fixing seat, as the basis of the entire fixing mechanism, is firmly connected to the upper surface of the transformer, providing solid support; the rotating shaft enables the fixing plate to rotate around it, thereby adapting to the requirements of different installation angles; then the connecting rod and the connecting shaft ensure the firm connection of the fixing rod, and also allow it to be fine-tuned within a certain range; the first spring and the card block further enhance the locking ability of the fixing mechanism; when the wire is installed, the card block can be pressed to fix the wire into the fixing rod, thereby ensuring that after the installation is completed, the entire wire can be firmly fixed in the specified position and is not easy to loosen or fall off.

[0018] The beneficial effects of the AC ice-melting expansion-type voltage-regulating device for distribution lines of the present invention are as follows: through the arrangement of the fixed column, the limiting hole, the telescopic column, the second spring, the bolt and the protective plate, an additional protective barrier can be provided for the transformer in snowy days, effectively resisting the invasion and damage of ice and snow to the equipment; the fixed column is used as a supporting point and is firmly installed on the upper surface of the transformer to ensure the stability of the entire protective structure; the limiting hole limits the moving range of the telescopic column and also serves as a locking point for the bolt, thereby enhancing the fixing effect of the protective plate; the telescopic column can be flexibly extended and retracted under the action of the bolt; when encountering accumulated ice and snow, the protective plate will be driven inward by the external force, and at this time the second spring cooperates with the bolt to lock through the limiting hole to prevent the protective plate from accidentally falling off, thereby further improving the protective effect.

[0019] The present invention also proposes an extended voltage regulation method for AC ice melting of distribution lines, which is applied to the extended voltage regulation device for AC ice melting of distribution lines, comprising:

[0020] Collect data needed to melt ice on transformers;

[0021] Analysis of line ice melting length;

[0022] The branch line of the ice-melting line is disconnected;

[0023] Ice melting short-circuit operation;

[0024] Start the ice-melting current to melt the ice;

[0025] Disconnect the ice melter when finished.

[0026] The beneficial effects of the extended voltage regulation method for AC ice melting of distribution lines of the present invention are as follows: the present invention can simultaneously melt the ice on the three phases of a 10kV distribution network line, and realize ice melting on the entire long-distance 10kV distribution network line, with a short ice melting time, fewer branches that need to be disconnected, and a small ice melting workload, which can greatly reduce the labor intensity of manual de-icing of the distribution network and improve the safety of the ice melting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the fixed seat and the rotating shaft used in conjunction with each other in the present invention;

[0030] Figure 3 It is a schematic diagram of the cooling mechanism structure of the present invention;

[0031] Figure 4 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0032] Figure 5 It is a schematic diagram of the structure of the protection mechanism of the present invention;

[0033] Figure 6 For the present invention Figure 5 The enlarged structural diagram at B in the middle;

[0034] Figure 7 It is a structural schematic diagram of the AC ice melting method for distribution lines of the present invention.

[0035] In the figure: 1. transformer; 2. cooling mechanism; 201. corrugated radiator; 202. heat dissipation hole; 203. cooling pipe; 204. water pump; 205. water pipe; 206. water tank; 3. fixing mechanism; 301. fixing seat; 302. rotating shaft; 303. fixing plate; 304. connecting rod; 305. connecting shaft; 306. fixing rod; 307. first spring; 308. clamping block; 4. protection mechanism; 401. fixing column; 402. limiting hole; 403. telescopic column; 404. second spring; 405. clamping bolt; 406. protection plate; 5. high-voltage terminal; 6. hanging plate column; 7. oil level gauge; 8. low-voltage terminal. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0037] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0039] Example 1, reference Figures 1 to 7 , which is the first embodiment of the present invention, and provides an AC ice melting expansion type voltage regulating device for distribution lines, comprising a transformer 1, a cooling mechanism 2 is arranged on one side surface of the transformer 1, a fixing mechanism 3 is arranged on the upper surface of the transformer 1, a protection mechanism 4 is arranged on the upper surface of the transformer 1, a high voltage terminal 5 is fixedly installed on the upper surface of the transformer 1, a hanging plate column 6 is fixedly installed on the upper surface of the transformer 1, an oil level gauge 7 is fixedly installed on the upper surface of the transformer 1, and a low voltage terminal 8 is fixedly installed on the upper surface of the transformer 1;

[0040] The cooling mechanism 2 includes a corrugated radiator 201, a heat dissipation hole 202, a cooling pipe 203, a water pump 204, a water pipe 205 and a water tank 206. The corrugated radiator 201 is fixedly connected to one side of the transformer 1. The heat dissipation hole 202 is opened on one side surface of the corrugated radiator 201. The cooling pipe 203 is penetrated and connected to the outer surface of the corrugated radiator 201. The water pump 204 is fixedly connected to one side surface of the cooling pipe 203. The water pipe 205 is fixedly connected to one side surface of the water pump 204. The water tank 206 is fixedly connected to one side surface of the water pipe 205. Through the arrangement of the corrugated radiator 201, the heat dissipation hole 202, the cooling pipe 203, the water pump 204, the water pipe 205 and the water tank 206, the heat generated by the transformer 1 during operation can be effectively dissipated, thereby ensuring the stable operation of the equipment. The corrugated radiator 201 is made of special material and has excellent heat dissipation performance. The heat dissipation holes 202 on its surface make the air flow smoother, thereby improving the heat dissipation efficiency. When the internal temperature of the transformer 1 rises, the water pump 204 starts, and the coolant in the water tank 206 is circulated to the corrugated radiator 201 through the cooling pipe 203. The flow of the coolant absorbs and takes away the heat, and then flows back to the water tank 206 through the water pipe 205 for cooling circulation, forming a complete heat dissipation system.

[0041] Preferably, the fixing mechanism 3 includes a fixing seat 301, a rotating shaft 302, a fixing plate 303, a connecting rod 304, a connecting shaft 305, a fixing rod 306, a first spring 307 and a clamping block 308. The upper surface of the transformer 1 is fixedly connected with the fixing seat 301, the upper surface of the fixing seat 301 is rotatably connected with the rotating shaft 302, the upper surface of the rotating shaft 302 is fixedly connected with the fixing plate 303, the upper surface of the fixing plate 303 is fixedly connected with the connecting rod 304, one side surface of the connecting rod 304 is penetrated with the connecting shaft 305, one side surface of the connecting shaft 305 is fixedly connected with the fixing rod 306, one side surface of the connecting shaft 305 is fixedly connected with the first spring 307, one side surface of the first spring 307 is fixedly connected with the clamping block 308, through the fixing seat 301, the rotating shaft 302, the fixing plate 303, the connecting rod 304, the connecting shaft 305 05. The setting of the fixing rod 306, the first spring 307 and the block 308 enables the wire to flexibly adjust the fixed position during the installation process, thereby enhancing the stability and adaptability of the installation. The fixing seat 301, as the basis of the entire fixing mechanism, is firmly connected to the upper surface of the transformer 1 and provides solid support. The rotating shaft 302 enables the fixing plate 303 to rotate around it to meet the needs of different installation angles. Then the connecting rod 304 and the connecting shaft 305 ensure the stable connection of the fixing rod 306 and allow it to be fine-tuned within a certain range. The first spring 307 and the block 308 further enhance the locking ability of the fixing mechanism. When the wire is installed, the block 308 can be pressed to fix the wire into the fixing rod 306, ensuring that after the installation is completed, the entire wire can be firmly fixed in the specified position and is not easy to loosen or fall off.

[0042] Preferably, the protection mechanism 4 includes a fixed column 401, a limiting hole 402, a telescopic column 403, a second spring 404, a latch 405 and a protective plate 406. The upper surface of the transformer 1 is fixedly connected with the fixed column 401, and a limiting hole 402 is provided on one side surface of the fixed column 401. The inner surface of the fixed column 401 is slidably connected with the telescopic column 403, and one side surface of the telescopic column 403 is fixedly connected with the second spring 404. The one side surface of the second spring 404 is fixedly connected with the latch 405, and the upper surface of the telescopic column 403 is fixedly connected with the protective plate 406. By arranging the fixed column 401, the limiting hole 402, the telescopic column 403, the second spring 404, the latch 405 and the protective plate 406, the transformer can be protected in icy and snowy days. An additional protective barrier is provided to effectively resist the invasion and damage of ice and snow to the equipment. The fixed column 401 is firmly installed on the upper surface of the transformer 1 as a supporting point, ensuring the stability of the entire protective structure. The limiting hole 402 limits the moving range of the telescopic column 403 and also serves as a locking point for the clamp 405, thereby enhancing the fixing effect of the protective plate 406. The telescopic column 403 can be flexibly extended and retracted under the action of the clamp 405. When encountering accumulated ice and snow, the protective plate 406 is subjected to external force and drives the telescopic column 403 to retract inward. At this time, the second spring 404 cooperates with the clamp 405 to lock through the limiting hole 402 to prevent the protective plate 406 from accidentally falling off, thereby further improving the protective effect. The protective plate 406 is made of high-strength and low-temperature resistant material.

[0043] It should be noted that a cooling pipe 203 is fixedly connected to one side surface of the water pump 204, and a water pipe 205 is fixedly connected to the other side surface of the water pump 204. Through the setting of the cooling pipe 203, the coolant can form an efficient circulation path between the transformer and the water tank.

[0044] Among them, the heat dissipation holes 202 are opened at equal intervals on one side surface of the corrugated radiator 201, and the cooling pipe 203 passes through the surface of one side of multiple corrugated radiators 201. The setting of the heat dissipation holes 202 further promotes the convection heat exchange between the air and the surface of the corrugated radiator 201, so that the heat can be dissipated into the environment more quickly.

[0045] Furthermore, the first spring 307 and the clamping block 308 form a clamping structure, and the fixing seat 301 and the rotating shaft 302 form a rotating structure. Through the setting of the clamping block 308, the wires can be quickly and firmly locked on the fixing rod 306, avoiding the looseness problem that may occur in the traditional fixing method, and enhancing the reliability and safety of the equipment operation.

[0046] Furthermore, the limiting holes 402 are opened at equal intervals on one side surface of the fixing column 401, and the second spring 404 and the latch 405 form a telescopic structure. Through the setting of the limiting holes 402, not only a precise moving trajectory is provided for the telescopic column 403, but also the stability of the latch 405 in the locked state is ensured.

[0047] Furthermore, the inner wall size of the limiting hole 402 matches the outer wall size of the clamp 405, and the fixed column 401 and the telescopic column 403 form a telescopic structure. Through the setting of the clamp 405, the distance between the protective plate 406 and the transformer 1 can be adjusted to adapt to the thickness changes of ice and snow accumulation under different climatic conditions.

[0048] Working principle: When the internal temperature of the transformer 1 rises, the water pump 204 starts, and the coolant in the water tank 206 is circulated to the corrugated radiator 201 through the cooling pipe 203. The coolant absorbs and takes away the heat through the flow of the coolant, and then flows back to the water tank 206 through the water pipe 205 for cooling circulation, forming a complete heat dissipation system. When connecting the wires, the fixing seat 301, as the basis of the entire fixing mechanism, is firmly connected to the upper surface of the transformer 1, providing solid support. The rotating shaft 302 enables the fixing plate 303 to rotate around it, so as to meet the needs of different installation angles. Then the connecting rod 304 and the connecting shaft 305 ensure the firm connection of the fixing rod 306, and also allow it to be fine-tuned within a certain range. The first spring 307 and the block 308 further enhance the locking ability of the fixing mechanism. When installing the wires, the block 308 can be pressed to fix the wires into the fixing rod 306, ensuring that after the installation is completed, the entire wire The utility model can be firmly fixed in the designated position and is not easy to loosen or fall off, so that the wire can be flexibly adjusted to the fixed position during the installation process, thereby enhancing the stability and adaptability of the installation. In snowy days, the utility model can provide an additional protective barrier for the transformer, effectively resisting the invasion and damage of ice and snow to the equipment. The fixing column 401 is firmly installed on the upper surface of the transformer 1 as a supporting point, thereby ensuring the stability of the entire protective structure. The limiting hole 402 limits the movement range of the telescopic column 403, and also serves as a locking point of the clamping bolt 405, thereby enhancing the fixing effect of the protective plate 406. The telescopic column 403 can be flexibly extended and retracted under the action of the clamping bolt 405. When encountering accumulated ice and snow, the protective plate 406 is subjected to the action of external force and will drive the telescopic column 403 to retract inwardly. At this time, the second spring 404 cooperates with the clamping bolt 405 to lock through the limiting hole 402 to prevent the protective plate 406 from accidentally falling off, thereby further improving the protective effect. The protective plate 406 is made of high-strength and low-temperature resistant material.

[0049] Example 2, reference Figure 1 to Figure 7 , which is the second embodiment of the present invention. Different from the previous embodiment, this embodiment provides a method for using an AC ice melting expansion type voltage regulating device for a power distribution line, and the steps are as follows:

[0050] S1, collecting data required for transformer 1 to melt ice;

[0051] S2. Analysis of line ice melting length;

[0052] S3, ice-melting line branch disconnected;

[0053] S4, ice melting short-circuit operation;

[0054] S5, start ice-melting current to melt ice;

[0055] S6. After completion, disconnect the ice melting device.

[0056] A current loop can be formed between the three phases inside the distribution transformer, rather than just through the ice-melting short-circuit. This phenomenon may cause the shunting of the ice-melting current of the distribution network line, that is, the ice-melting current output by the ice-melting device will gradually decrease along the line, and the current may be much smaller than the expected value at the end of the line, thus failing to achieve the expected ice-melting effect. In addition, when the distribution network line adopts DC ice-melting, since the DC impedance of the distribution transformer is very small, in order to avoid the DC bias problem caused by the ice-melting current flowing through the distribution transformer, the high-voltage side switches of all distribution transformers along the line between the access point of the ice-melting device and the short-circuit must be disconnected during the ice-melting period. Even the high-voltage side switches of the distribution transformer on the outside of the access point of the ice-melting device, that is, on the other side of the ice-melting short-circuit, also need to be disconnected. Otherwise, a DC current will be formed through the high-voltage side of the distribution transformer. Current loop; therefore, before ice melting, it is necessary to open the high-voltage side switch of the distribution transformer and restore it after the ice melting is completed. When the AC ice melting method is used, although there is no DC bias problem, if the distribution transformer is not opened, the ice melting voltage will be transmitted to the user side through the distribution transformer. Since the ice melting voltage is generally much lower than the normal power supply voltage, if the user mistakenly believes that the line is not energized, operating the electrical equipment at this time may threaten personal safety; this method is highly practical and easy to operate. It can melt the ice on the three phases of the 10kV distribution network line at the same time, and realize the full-line ice melting of the long-distance 10kV distribution network line. The ice melting time is short, the number of branches that need to be disconnected is small, and the ice melting workload is small, which can greatly reduce the labor intensity of manual de-icing of the distribution network and improve the safety of the ice melting process.

[0057] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An AC ice melting expansion type voltage regulating device for distribution lines, comprising a transformer (1), characterized in that: A cooling mechanism (2) is provided on one side surface of the transformer (1), a fixing mechanism (3) is provided on the upper surface of the transformer (1), a protection mechanism (4) is provided on the upper surface of the transformer (1), a high-voltage terminal (5) is fixedly installed on the upper surface of the transformer (1), a hanging plate column (6) is fixedly installed on the upper surface of the transformer (1), an oil level gauge (7) is fixedly installed on the upper surface of the transformer (1), and a low-voltage terminal (8) is fixedly installed on the upper surface of the transformer (1); The cooling mechanism (2) comprises a corrugated heat sink (201), heat dissipation holes (202), a cooling pipe (203), a water pump (204), a water pipe (205) and a water tank (206); one side of the transformer (1) is fixedly connected to the corrugated heat sink (201); one side surface of the corrugated heat sink (201) is provided with heat dissipation holes (202); the outer surface of the corrugated heat sink (201) is penetrated by a cooling pipe (203); one side surface of the cooling pipe (203) is fixedly connected to the water pump (204); one side surface of the water pump (204) is fixedly connected to the water pipe (205); and one side surface of the water pipe (205) is fixedly connected to the water tank (206).

2. The AC ice melting expansion type voltage regulating device for power distribution lines according to claim 1, characterized in that: The fixing mechanism (3) comprises a fixing seat (301), a rotating shaft (302), a fixing plate (303), a connecting rod (304), a connecting shaft (305), a fixing rod (306), a first spring (307) and a clamping block (308); the upper surface of the transformer (1) is fixedly connected to the fixing seat (301); the upper surface of the fixing seat (301) is rotatably connected to the rotating shaft (302); the upper surface of the rotating shaft (302) is fixedly connected to the fixing plate (303); the upper surface of the fixing plate (303) is fixedly connected to the connecting rod (304); a connecting shaft (305) is passed through one side surface of the connecting rod (304); a fixing rod (306) is fixedly connected to one side surface of the connecting shaft (305); a first spring (307) is fixedly connected to one side surface of the connecting shaft (305); and a clamping block (308) is fixedly connected to one side surface of the first spring (307).

3. The AC ice melting expansion type voltage regulating device for distribution lines according to claim 2, characterized in that: The protection mechanism (4) comprises a fixed column (401), a limiting hole (402), a telescopic column (403), a second spring (404) and a latch (405); the upper surface of the transformer (1) is fixedly connected to the fixed column (401); a limiting hole (402) is provided on one side surface of the fixed column (401); the inner side surface of the fixed column (401) is slidably connected to the telescopic column (403); a second spring (404) is fixedly connected to one side surface of the telescopic column (403); and the latch (405) is fixedly connected to one side surface of the second spring (404).

4. The AC ice melting expansion type voltage regulating device for power distribution lines according to claim 3, characterized in that: A protective plate (406) is fixedly connected to the upper surface of the telescopic column (403).

5. The AC ice melting expansion type voltage regulating device for power distribution lines according to claim 4, characterized in that: A cooling pipe (203) is fixedly connected to one side surface of the water pump (204), and a water delivery pipe (205) is fixedly connected to the other side surface of the water pump (204).

6. The AC ice melting expansion type voltage regulating device for power distribution lines according to claim 5, characterized in that: The heat dissipation holes (202) are opened at equal intervals on one side surface of the corrugated heat sink (201), and the cooling pipe (203) penetrates through the one side surfaces of a plurality of corrugated heat sinks (201).

7. The AC ice melting expansion type voltage regulating device for power distribution lines according to claim 6, characterized in that: The first spring (307) and the clamping block (308) form a clamping structure, and the fixing seat (301) and the rotating shaft (302) form a rotating structure.

8. The AC ice melting expansion type voltage regulating device for power distribution lines according to claim 7, characterized in that: The limiting holes (402) are opened at equal intervals on a side surface of the fixing column (401), and the second spring (404) and the latch (405) form a telescopic structure.

9. The AC ice melting expansion type voltage regulating device for power distribution lines according to claim 8, characterized in that: The inner wall size of the limiting hole (402) matches the outer wall size of the latch (405), and the fixed column (401) and the telescopic column (403) form a telescopic structure.

10. An AC ice melting expansion type voltage regulation method for distribution lines, applied to the AC ice melting expansion type voltage regulation device for distribution lines according to any one of claims 1 to 9, characterized in that: include, Collecting data required for transformer (1) ice melting; Analysis of line ice melting length; The branch line of the ice-melting line is disconnected; Ice melting short-circuit operation; Start the ice-melting current to melt the ice; Disconnect the ice melter when finished.

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