Temperature regulating device for power transmission transformer safety management

Abstract

The utility model discloses a temperature regulation device for power transmission and transformation transformer safety management relates to power transmission and transformation transformer technical field, specifically includes setting in power transmission and transformation transformer's several temperature sensor and initiative temperature regulating component, and the initiative temperature regulating component includes with power transmission and transformation transformer connection's fixed plate, with power transmission and transformation transformer connection's pumping plate, circulating liquid pump, heat exchange structure and circulating refrigerating unit. The temperature regulation device for power transmission and transformation transformer safety management, utilize initiative temperature regulating component, oil liquid at power transmission and transformation transformer heat source place is pumped accurately from the pipeline that sets up outside power transmission and transformation transformer to heat exchange branch pipe, realizes the accurate heat exchange of heat exchange branch pipe in cooling medium and the oil liquid of waiting for cooling, improves oil liquid cooling speed, and then improves the temperature regulation efficiency of this application to power transmission and transformation transformer, effectively reduces the hysteresis of power transmission and transformation transformer temperature regulation.

Description

Technical Field

[0001] This utility model relates to the field of power transmission and transformation transformer technology, specifically a temperature control device for the safety management of power transmission and transformation transformers. Background Technology

[0002] Transmission and transformation transformers are core equipment in power systems, and their safe and stable operation directly affects the reliability of the power grid and the quality of power supply. During transformer operation, critical components such as windings and cores generate a large amount of heat due to current flow and magnetic flux. If the temperature is too high, it may lead to aging of insulation materials, partial discharge, or even equipment damage, and in severe cases, may cause fires or power outages. Therefore, real-time monitoring and precise control of transformer temperature are important measures to ensure its safe operation.

[0003] Currently, forced air cooling or forced oil cooling is commonly used to regulate transformer temperature. However, the movement of the cooling medium from the radiator or fan to the area to be cooled requires a certain amount of time, resulting in a significant lag in transformer temperature regulation and affecting its effectiveness. Furthermore, the temperature of the cooling medium gradually increases during its flow, impacting its performance and further affecting the transformer temperature regulation. Therefore, this application proposes a temperature control device for the safety management of power transmission and transformation transformers. Utility Model Content

[0004] This utility model provides a temperature control device for the safety management of power transmission and transformation transformers, which solves the problems mentioned in the background art, such as the time required for the cooling medium to move to the heat dissipation part, resulting in a significant lag in the temperature control of the transformer, affecting the temperature control effect, and the gradual increase in temperature of the cooling medium during the flow process, affecting the effectiveness of the cooling medium.

[0005] This utility model provides the following technical solution: a temperature control device for the safety management of power transmission and transformation transformers, comprising several temperature sensors and an active temperature control component installed inside the power transmission and transformation transformer. The active temperature control component includes a fixed plate connected to the power transmission and transformation transformer, a liquid extraction plate connected to the power transmission and transformation transformer, a circulating liquid pump, a heat exchange structure, and a circulating refrigeration unit. The liquid inlet end of the liquid extraction plate and the liquid outlet end of the fixed plate are both located in the inner cavity of the power transmission and transformation transformer. The liquid outlet end of the liquid extraction plate and the liquid inlet end of the fixed plate are connected through the circulating liquid pump. A heat exchange structure is provided on the inner side of the fixed plate. The heat exchange structure includes a fluid pumping pipe connected to the liquid outlet end of the circulating refrigeration unit and a return pipe connected to the return end of the circulating refrigeration unit. Heat exchange branch pipes are evenly arranged between the fluid pumping pipe and the return pipe. A cooler is installed on the heat exchange branch pipe. The cold end of the cooler is located in the inner cavity of the heat exchange branch pipe, and the hot end of the cooler extends to the outside of the power transmission and transformation transformer.

[0006] Preferably, it also includes a passive temperature control component, which includes a heat sink embedded in the side wall of the power transmission and transformation transformer.

[0007] Preferably, the liquid inlet end of the liquid extraction plate is uniformly provided with liquid inlet holes, and the position of the liquid inlet holes corresponds to the heat source of the power transmission and transformation transformer; the liquid outlet end of the fixed plate is uniformly provided with liquid outlet holes, and the oil sprayed through the liquid outlet holes directly acts on the outer wall of the heat exchange branch pipe.

[0008] Preferably, a one-way valve is provided at the end where the heat exchange branch pipe connects to the return pipe.

[0009] Preferably, a sealing cover and a blower are provided on the outside of the fixing plate. The air outlet of the blower is connected to the air inlet of the sealing cover, and the air outlet of the sealing cover is connected to an exhaust pipe. The hot end of the cooler extends into the sealing cover, and the setting direction of the cooler is parallel to the air inlet of the sealing cover. The airflow discharged from the air inlet of the sealing cover acts synchronously on multiple sets of coolers.

[0010] Preferably, the inlet end of the circulating liquid pump is connected to the outlet end of the suction plate through an inlet pipe, and the outlet end of the circulating liquid pump is connected to the inlet end of the fixed plate through an outlet pipe.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. The temperature control device for the safety management of power transmission and transformation transformers utilizes an active temperature control component to precisely pump the oil from the heat source of the power transmission and transformation transformer from the pipeline installed outside the transformer to the heat exchange branch pipe. This achieves precise heat exchange between the cooling medium and the oil to be cooled in the heat exchange branch pipe, increases the cooling rate of the oil, and thus improves the temperature control efficiency of the power transmission and transformation transformer in this application, effectively reducing the lag in the temperature control of the power transmission and transformation transformer.

[0012] 2. The temperature control device for the safety management of the power transmission and transformation transformer utilizes a cooler to cool the refrigerant flowing in the heat exchange branch pipe, enabling the fluid remaining in the heat exchange branch pipe to exchange heat with the oil. This allows the refrigerant output from the circulating refrigeration unit to cool the power transmission and transformation transformer before entering the heat exchange branch pipe, increasing the oil cooling rate and further reducing the lag in temperature control of the power transmission and transformation transformer. Furthermore, the cooler reduces the temperature rise of the refrigerant, ensuring the temperature difference between the refrigerant and the oil to be cooled, thereby ensuring the heat exchange rate between the refrigerant and the oil and improving the speed of temperature control of the power transmission and transformation transformer. Attached Figure Description

[0013] Figure 1 This is a front view of the structure of this utility model; Figure 2 This is a bottom view of the structure of this utility model; Figure 3 This is a schematic cross-sectional view of the structure of this utility model; Figure 4 This is a schematic diagram of the active heat exchange component of this utility model. Figure 5 The structure of this utility model Figure 4 Explosion diagram.

[0014] In the diagram: 1. Temperature sensor; 2. Heat sink; 3. Liquid outlet; 4. Blower; 5. Mounting plate; 6. Exhaust pipe; 7. Liquid outlet pipe; 8. Circulating refrigeration unit; 9. Circulating liquid pump; 10. Refrigerator; 11. Sealing cover; 12. Liquid inlet; 13. Fluid pumping pipe; 14. Heat exchange branch pipe; 15. Return pipe; 16. Liquid extraction plate; 17. Liquid inlet pipe. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] This utility model provides embodiments: Please refer to Figures 1-5 A temperature control device for the safety management of power transmission and transformation transformers includes several temperature sensors 1 and an active temperature control component installed inside the power transmission and transformation transformer. Through the installation of several temperature sensors 1, the controller of this application can realize multi-point temperature detection of the power transmission and transformation transformer, monitor the temperature distribution inside the power transmission and transformation transformer in real time, so that this application can cool down local overheating in a timely manner, ensure the safety of the power transmission and transformation transformer, improve the response speed of this application, and reduce the temperature control lag effect.

[0017] The active temperature control assembly includes a fixed plate 5 connected to the power transmission and transformation transformer, a liquid extraction plate 16 connected to the power transmission and transformation transformer, a circulating liquid pump 9, a heat exchange structure, and a circulating refrigeration unit 8. The liquid inlet end of the liquid extraction plate 16 and the liquid outlet end of the fixed plate 5 are both located within the inner cavity of the power transmission and transformation transformer. The liquid inlet end of the liquid extraction plate 16 is uniformly provided with liquid inlet holes 12, the positions of which correspond to the heat source of the power transmission and transformation transformer. The liquid outlet end of the fixed plate 5 is uniformly provided with liquid outlet holes 3. The liquid outlet end of the liquid extraction plate 16 is connected to the liquid inlet end of the fixed plate 5 via the circulating liquid pump 9. The liquid inlet end of the circulating liquid pump 9 is connected to the liquid outlet end of the liquid extraction plate 16 via an inlet pipe 17, and the liquid outlet end of the circulating liquid pump 9 is connected to the liquid inlet end of the fixed plate 5 via an outlet pipe 7. When the circulating liquid pump 9 is working, it can pump the oil around the heat source of the power transmission and transformation transformer back into the inner cavity of the power transmission and transformation transformer through the inlet hole 12, the extraction plate 16, the inlet pipe 17, the outlet pipe 7, the fixing plate 5 and the outlet hole 3, thereby changing the position of the oil to be cooled.

[0018] A heat exchange structure is provided on the inner side of the fixed plate 5. The heat exchange structure includes a fluid pumping pipe 13 connected to the liquid outlet of the circulating refrigeration unit 8 and a return pipe 15 connected to the return end of the circulating refrigeration unit 8. Heat exchange branch pipes 14 are evenly arranged between the fluid pumping pipe 13 and the return pipe 15. When the circulating refrigeration unit 8 is working, the refrigerant for cooling the oil in the power transmission and transformation transformer enters the fluid pumping pipe 13 through the liquid outlet of the circulating refrigeration unit 8. The liquid in the fluid pumping pipe 13 is evenly distributed in multiple return pipes 15. During the flow of the refrigerant in the return pipes 15, it can exchange heat with the surrounding oil to cool the oil, thereby reducing the temperature inside the power transmission and transformation transformer. After heat exchange, the refrigerant flows back to the circulating refrigeration unit 8 through the return pipes 15. Furthermore, a one-way valve is provided at the end of the heat exchange branch pipe 14 connected to the return pipe 15 to prevent backflow of the refrigerant in the return pipe 15.

[0019] The circulating refrigeration unit 8 is existing technology, capable of realizing the circulating flow of the refrigerant and precise temperature control. In Embodiment 1 of this application, the circulating refrigeration unit 8 is based on the mature vapor compression refrigeration cycle principle, realizing the directional flow and circulating refrigeration of the refrigerant, and in conjunction with an intelligent temperature control module (such as a PLC or PID controller), dynamically adjusts the refrigeration power according to the set value to ensure that the temperature fluctuation range of the refrigerant is controlled within the preset threshold.

[0020] The oil sprayed through the outlet hole 3 directly acts on the outer wall of the heat exchange branch pipe 14. This setting enables precise heat exchange between the heat exchange components and the oil to be cooled, improves the cooling speed of the oil, and thus improves the temperature control efficiency of the power transmission and transformation transformer in this application, effectively reducing the lag in the temperature control of the power transmission and transformation transformer.

[0021] A cooler 10 is installed on the heat exchange branch pipe 14. The cold end of the cooler 10 is located inside the heat exchange branch pipe 14, and the hot end of the cooler 10 extends to the outside of the power transmission and transformation transformer. A sealing cover 11 and a blower 4 are installed on the outside of the fixing plate 5. The air outlet of the blower 4 is connected to the air inlet of the sealing cover 11, and the air outlet of the sealing cover 11 is connected to an exhaust pipe 6. The hot end of the cooler 10 extends into the sealing cover 11, and the installation direction of the cooler 10 is parallel to the air inlet of the sealing cover 11. The airflow discharged from the air inlet of the sealing cover 11 acts synchronously on multiple sets of coolers 10. When blower 4 is working, it can blow outside air into the inner cavity of the sealing cover 11. The air blown into the sealing cover 11 can act on the hot end of the cooler 10 to cool it down, which facilitates the cooling of the refrigerant in the heat exchange branch pipe 14 by the cooler 10. Excess air in the sealing cover 11 is discharged through the exhaust pipe 6. In this application, the outlet of the exhaust pipe 6 can be set in a suitable position to prevent the air discharged from the exhaust pipe 6 from being blown back into the inner cavity of the sealing cover 11 by blower 4, thus maintaining the unidirectional airflow organization of the system. In Embodiment 1 of this application, the cooler 10 is a semiconductor cooler, and its model can be set according to requirements, which is not limited here.

[0022] As described above, this application utilizes an active temperature control component to precisely pump the oil from the heat source of the power transmission and transformation transformer from the external pipeline to the heat exchange branch pipe 14, achieving precise heat exchange between the cooling medium and the oil to be cooled within the heat exchange branch pipe 14. This improves the oil cooling rate and thus enhances the temperature control efficiency of the power transmission and transformation transformer, effectively reducing the lag in temperature control. Furthermore, the refrigerator 10 cools the cooling medium flowing within the heat exchange branch pipe 14, allowing the fluid remaining within the heat exchange branch pipe 14 to exchange heat with the oil. Consequently, the cooling medium output from the circulating refrigeration unit 8 can cool the power transmission and transformation transformer before entering the heat exchange branch pipe 14, further improving the oil cooling rate and reducing the lag in temperature control.

[0023] The temperature control device for safety management of power transmission and transformation transformers proposed in this application also includes a passive temperature control component. The passive temperature control component includes a heat sink 2, which is embedded in the side wall of the power transmission and transformation transformer. The heat sink 2 can be used to achieve passive cooling of the power transmission and transformation transformer, thereby reducing the energy consumption of the active cooling component.

[0024] All electrical components involved in this application are existing technologies. Those skilled in the art can select appropriate models of electrical components according to their needs. No restrictions or elaborations are made here. Those skilled in the art understand their connection methods. With the help of those skilled in the art, all electrical components in this application and their compatible power supplies are connected by wires. According to the actual situation, appropriate controllers are selected to meet control requirements. For specific connections and control sequences, please refer to the description below. The electrical connections between each electrical component are completed in the order of their operation. The detailed connection methods are well-known technologies in the art. The following mainly introduces the working principle and process, and will not describe the electrical control.

[0025] In summary: When the temperature control device for the safety management of power transmission and transformation transformers is in use, the heat sink 2 is used to quickly conduct the heat inside the power transmission and transformation transformer to the outside of the transformer and exchange heat with the air, thereby achieving efficient passive cooling of the power transmission and transformation transformer; the temperature sensor 1 is used to detect the temperature inside the power transmission and transformation transformer in real time. The controller of this application determines whether active cooling is needed and the temperature of the cooling medium based on the detection results of the temperature sensor 1. When active cooling of the power transmission and transformation transformer is needed, the active cooling component works, and the circulating liquid pump 9, the circulating refrigeration unit 8, the blower 4 and the cooler 10 all work. The operation of the refrigeration unit 10 cools the refrigerant retained in the heat exchange branch pipe 14, so that the refrigerant output from the circulating refrigeration unit 8 can cool the power transmission and transformation transformer before entering the heat exchange branch pipe 14, thereby increasing the cooling speed of the oil in the power transmission and transformation transformer. The operation of the blower 4 can blow outside air into the sealing cover 11. The air blown into the sealing cover 11 can cool the hot end of the refrigeration unit 10, which facilitates the operation of the refrigeration unit 10. Excess air in the sealing cover 11 is discharged through the exhaust pipe 6. When the circulating refrigeration unit 8 is working, the refrigerant at the required temperature can circulate within the heat exchange components. When the circulating liquid pump 9 is working, the oil around the heat source of the power transmission and transformation transformer can be pumped back into the inner cavity of the power transmission and transformation transformer through the liquid inlet 12, the liquid extraction plate 16, the liquid inlet pipe 17, the liquid outlet pipe 7, the fixing plate 5, and the liquid outlet 3, changing the position of the oil to be cooled and accurately spraying the oil to be cooled onto the outer wall of the heat exchange branch pipe 14, realizing precise heat exchange between the oil to be cooled and the heat exchange branch pipe 14, improving the cooling rate of the oil, thereby improving the temperature control efficiency of the power transmission and transformation transformer in this application, further effectively reducing the lag in the temperature control of the power transmission and transformation transformer, and in this process, the operation of the refrigeration unit 10 can reduce the temperature rise of the refrigerant, ensuring the temperature difference between the refrigerant and the oil to be cooled, thereby ensuring the heat exchange rate between the two and improving the temperature control speed of the power transmission and transformation transformer.

Claims

1. A temperature control device for safety management of power transmission and transformation transformers, comprising a plurality of temperature sensors (1) and an active temperature control component installed inside the power transmission and transformation transformer, characterized in that: The active temperature control assembly includes a fixed plate (5) connected to the power transmission and transformation transformer, a liquid extraction plate (16) connected to the power transmission and transformation transformer, a circulating liquid pump (9), a heat exchange structure, and a circulating refrigeration unit (8). The liquid inlet end of the liquid extraction plate (16) and the liquid outlet end of the fixed plate (5) are both located in the inner cavity of the power transmission and transformation transformer. The liquid outlet end of the liquid extraction plate (16) and the liquid inlet end of the fixed plate (5) are connected through the circulating liquid pump (9). A heat exchange structure is provided on the inner side of the fixed plate (5). The heat exchange structure includes a fluid pumping pipe (13) connected to the liquid outlet of the circulating refrigeration unit (8) and a return pipe (15) connected to the return end of the circulating refrigeration unit (8). Heat exchange branch pipes (14) are evenly arranged between the fluid pumping pipe (13) and the return pipe (15). A cooler (10) is provided on the heat exchange branch pipe (14). The cold end of the cooler (10) is located in the inner cavity of the heat exchange branch pipe (14), and the hot end of the cooler (10) extends to the outside of the power transmission and transformation transformer.

2. The temperature control device for safety management of power transmission and transformation transformers according to claim 1, characterized in that: It also includes a passive temperature control component, which includes a heat sink (2) embedded in the side wall of the power transmission and transformation transformer.

3. The temperature control device for safety management of power transmission and transformation transformers according to claim 1, characterized in that: The liquid inlet end of the liquid extraction plate (16) is uniformly provided with liquid inlet holes (12), and the position of the liquid inlet holes (12) corresponds to the heat source of the power transmission and transformation transformer; the liquid outlet end of the fixed plate (5) is uniformly provided with liquid outlet holes (3), and the oil sprayed through the liquid outlet holes (3) directly acts on the outer wall of the heat exchange branch pipe (14).

4. The temperature control device for safety management of power transmission and transformation transformers according to claim 1, characterized in that: A one-way valve is provided at one end of the heat exchange branch pipe (14) that connects to the return pipe (15).

5. The temperature control device for safety management of power transmission and transformation transformers according to claim 1, characterized in that: A sealing cover (11) and a blower (4) are provided on the outside of the fixed plate (5). The air outlet of the blower (4) is connected to the air inlet of the sealing cover (11). The air outlet of the sealing cover (11) is connected to an exhaust pipe (6). The hot end of the cooler (10) extends into the sealing cover (11), and the setting direction of the cooler (10) is parallel to the air inlet of the sealing cover (11). The airflow discharged from the air inlet of the sealing cover (11) acts synchronously on multiple sets of coolers (10).

6. The temperature control device for safety management of power transmission and transformation transformers according to claim 1, characterized in that: The inlet end of the circulating liquid pump (9) is connected to the outlet end of the pumping plate (16) through the inlet pipe (17), and the outlet end of the circulating liquid pump (9) is connected to the inlet end of the fixed plate (5) through the outlet pipe (7).

Images