Waste heat utilization system, method and device for transformer and computer equipment

Abstract

The invention discloses a waste heat utilization system, method and device for a transformer and computer equipment. The system comprises a heat exchanger, a first heat storage water tank and a refrigerating unit, the input end of the heat exchanger is connected with a target transformer, and the heat exchanger is used for extracting waste heat of the target transformer and transmitting the waste heat into the first heat storage water tank; the input end of the first heat storage water tank is connected with the heat exchanger, the output end of the first heat storage water tank is connected with the refrigerating unit, and the first heat storage water tank is used for providing heat for the refrigerating unit in a first preset period and further used for providing heat for a substation where the target transformer is located in a second preset period; the refrigerating unit is used for supplying cold based on heat provided by the first heat storage water tank in a first preset period. According to the invention, the technical problems of low energy utilization efficiency and unstable operation caused by the fact that the waste heat utilization of the transformer substation is only carried out in winter at present are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power, and in particular, to a waste heat utilization system, method, device, and computer equipment for a transformer. Background Art

[0002] In a power transmission system, as a core device, an oil-immersed transformer generates a large amount of heat during normal operation. This heat mainly comes from core eddy current loss and copper loss, resulting in the transformer oil temperature remaining at a relatively high level throughout the year. Especially in summer, the top oil temperature often reaches 60 - 80°C, and even in winter, the oil temperature is generally not lower than 30°C, which provides an ideal low-temperature heat source for a heat pump system.

[0003] Currently, for the utilization of waste heat in a substation, it mainly focuses on exchanging heat with the water in the heating system in winter and then using a heat pump to heat the substation and its surrounding areas. However, this utilization method is limited by the fluctuation of the transformer's working load rate, making the operating conditions of the heat pump system unstable, and it only works in winter. In summer, the heat pump equipment is idle and cannot meet the cooling load requirements of the substation's air conditioning system. Given that the substation has energy consumption and heating and cooling demands throughout the year, simply relying on the winter operation of the heat pump system obviously fails to fully utilize the waste heat resources and also fails to solve the problem of waste heat recovery and utilization in summer.

[0004] In view of the above problems, no effective solution has been proposed yet. Summary of the Invention

[0005] Embodiments of the present invention provide a waste heat utilization system, method, device, and computer equipment for a transformer to at least solve the technical problems of low energy utilization efficiency and unstable operation caused by the current waste heat utilization in a substation only in winter.

[0006] According to one aspect of the embodiments of the present invention, there is provided a waste heat utilization system for a transformer, including: a heat exchanger, a first hot water storage tank, and a refrigeration unit. The input end of the heat exchanger is connected to a target transformer for extracting the waste heat of the target transformer and transmitting it to the first hot water storage tank; the input end of the first hot water storage tank is connected to the heat exchanger, and the output end of the first hot water storage tank is connected to the refrigeration unit for providing heat to the refrigeration unit within a first preset period and also for providing heat to the substation where the target transformer is located within a second preset period; the refrigeration unit is used for cooling based on the heat provided by the first hot water storage tank within the first preset period.

[0007] Optionally, the above system further includes: a solar collector and a second hot water storage tank, wherein the solar collector is used to heat the water stored in the second hot water storage tank; the output end of the second hot water storage tank is connected to the output end of the first hot water storage tank, and is used to supplement heat to the water output from the first hot water storage tank when the temperature of the water output from the first hot water storage tank does not reach the preset threshold, wherein the preset thresholds corresponding to the first preset period and the second preset period are different.

[0008] Optionally, the above system further includes: a heat pump system, wherein the heat pump system is connected to the output end of the first hot water storage tank, and is used to continue heating the water output from the first hot water storage tank when the temperature of the water output from the first hot water storage tank still does not reach the preset threshold after the second hot water storage tank supplements heat.

[0009] According to another aspect of the embodiments of the present invention, there is also provided a method for utilizing waste heat of a transformer, which applies any one of the above waste heat utilization systems for a transformer, and includes: obtaining the temperature of the water output from the first hot water storage tank, wherein the first hot water storage tank is located in the waste heat utilization system and is used to collect the waste heat of the target transformer; when the temperature of the water output from the first hot water storage tank reaches the preset threshold, providing heat for the refrigeration unit or the substation based on the water output from the first hot water storage tank, wherein the refrigeration unit is located in the waste heat utilization system and the target transformer is located in the substation.

[0010] Optionally, when the waste heat utilization system includes a solar collector and a second hot water storage tank, it further includes: heating the water stored in the second hot water storage tank based on the solar collector; when the temperature of the water output from the first hot water storage tank does not reach the preset threshold, supplementing heat to the water output from the first hot water storage tank based on the second hot water storage tank to obtain the water after heat supplement; obtaining the temperature of the water after heat supplement; when the temperature of the water after heat supplement reaches the preset threshold, providing heat for the refrigeration unit or the substation.

[0011] Optionally, when the waste heat utilization system further includes a heat pump system, it further includes: when the temperature of the water after heat supplement does not reach the preset threshold, heating the water after heat supplement based on the heat pump system to obtain the water after continuous heating; obtaining the temperature of the water after continuous heating; when the temperature of the water after continuous heating reaches the preset threshold, providing heat for the refrigeration unit or the substation.

[0012] According to another aspect of the embodiments of the present invention, there is also provided a waste heat utilization device for a transformer, including: an acquisition module, configured to acquire the temperature of the water output from a first hot water storage tank, where the first hot water storage tank is located in the waste heat utilization system and is used to collect the waste heat of a target transformer; a heating module, configured to, when the temperature of the water output from the first hot water storage tank reaches a preset threshold, provide heat for a refrigeration unit or a substation based on the water output from the first hot water storage tank, where the refrigeration unit is located in the waste heat utilization system and the target transformer is located in the substation.

[0013] According to still another aspect of the embodiments of the present invention, there is also provided a non-volatile storage medium, which includes a stored program. When the program runs, it controls the device where the non-volatile storage medium is located to execute any one of the above waste heat utilization methods for a transformer.

[0014] According to yet another aspect of the embodiments of the present invention, there is also provided a computer device, which includes a processor for running a program. When the program runs, it executes any one of the above waste heat utilization methods for a transformer.

[0015] According to yet another aspect of the embodiments of the present invention, there is also provided a computer program product, which includes a computer program. When the computer program is executed by a processor, it implements any one of the above waste heat utilization methods for a transformer.

[0016] In the embodiments of the present invention, a waste heat utilization system for a transformer is adopted, which includes a heat exchanger, a first hot water storage tank, and a refrigeration unit. The input end of the heat exchanger is connected to the target transformer and is used to extract the waste heat of the target transformer and transfer it to the first hot water storage tank; the input end of the first hot water storage tank is connected to the heat exchanger, and the output end of the first hot water storage tank is connected to the refrigeration unit. It is used to provide heat for the refrigeration unit within a first preset period and is also used to provide heat for the substation where the target transformer is located within a second preset period; the refrigeration unit is used to provide cooling based on the heat provided by the first hot water storage tank within the first preset period, achieving the purpose of using the collected waste heat for the cooling of the refrigeration unit or the heating of the substation, thereby realizing the technical effects of efficiently using the waste heat of the transformer, improving energy efficiency, and reducing consumption, and further solving the technical problems of low energy utilization efficiency and unstable operation caused by the current waste heat utilization of substations only in winter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention, form a part of this application, and the schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0018] Figure 1It is a structural block diagram of a waste heat utilization system for a transformer according to an embodiment of the present invention;

[0019] Figure 2 It shows a hardware structural block diagram of a computer terminal for implementing a waste heat utilization method for a transformer;

[0020] Figure 3 It is a schematic flow chart of a waste heat utilization method for a transformer according to an embodiment of the present invention;

[0021] Figure 4 It is a structural block diagram of a waste heat recovery and utilization system for a combined cooling and heating substation of a solar combined heat pump system according to an optional embodiment of the present invention;

[0022] Figure 5 It is a schematic diagram of a control logic of a waste heat recovery and utilization system according to an optional embodiment of the present invention;

[0023] Figure 6 It is a structural block diagram of a waste heat utilization device for a transformer according to an embodiment of the present invention.

[0024] Among them, the above-mentioned drawings include the following reference numerals:

[0025] 1. Oil-immersed transformer; 2. Plate heat exchanger; 3. Hot water storage tank; 4. Solar collector; 5. Water pump; 6. Valve; 7. Heat pump evaporator; 8. Compressor; 9. Heat pump condenser; 10. Heat pump throttle valve; 11. Valve; 12. Water pump; 13. Valve; 14. Valve; 15. Generator; 16. Absorption refrigeration unit condenser; 17. Absorption refrigeration unit throttle valve; 18. Absorption refrigeration unit evaporator; 19. Absorber; 20. Water pump; 21. Water pump; 22. Water pump; 23. Make-up water pump; 24. Water pump; 25. Valve; 26. Make-up water pump; 27. Hot water storage tank; 28. Temperature sensor; 29. Temperature sensor. Detailed implementation manners

[0026] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present invention are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0028] According to an embodiment of the present invention, there is provided a waste heat utilization system for a transformer. Figure 1 FIG. is a structural block diagram of a waste heat utilization system for a transformer according to an embodiment of the present invention. As Figure 1 shown, the system includes: a heat exchanger, a first hot water storage tank, and a refrigeration unit.

[0029] The input end of the heat exchanger is connected to the target transformer, and is used to extract the waste heat of the target transformer and transfer it to the first hot water storage tank.

[0030] In this structure, the heat exchanger can be a plate heat exchanger, which has a high heat transfer efficiency and a small space occupation, and is very suitable for the waste heat utilization system. Inside the heat exchanger, the transformer oil and water form two independent fluid circuits, and heat exchange is carried out through metal plates. The heat of the transformer oil is transferred to the water through the metal plates, and the water is thus heated to form high-temperature hot water. The heated water is transported to the first hot water storage tank. This process not only reduces the increase in the temperature of the transformer oil and extends the service life of the transformer, but also realizes the effective recovery and utilization of waste heat.

[0031] The input end of the first hot water storage tank is connected to the heat exchanger, and the output end of the first hot water storage tank is connected to the refrigeration unit, and is used to provide heat for the refrigeration unit within a first preset period, and is also used to provide heat for the substation where the target transformer is located within a second preset period.

[0032] In this structure, the input end of the first heat storage water tank is directly connected to the output end of the heat exchanger. When the oil-immersed transformer generates waste heat during operation, this heat is extracted from the transformer oil through the heat exchanger and transferred to the first heat storage water tank with water as the medium. The first heat storage water tank is like a "reservoir" of thermal energy, which can effectively store the recovered heat and provide a stable and continuous heat source for subsequent utilization. The output end of the first heat storage water tank is connected to the absorption refrigeration unit. In summer or the first preset period when the system needs refrigeration, the high-temperature hot water in the heat storage water tank is transported to the refrigeration unit as the driving heat source of the absorption refrigeration system. In winter or the second preset period when the system needs heating, the hot water in the first heat storage water tank can directly provide a stable heat source for the substation and its surrounding areas for domestic hot water supply or heating demand.

[0033] The refrigeration unit is used to provide cooling based on the heat provided by the first heat storage water tank in the first preset period.

[0034] In this structure, in the first preset period, the high-temperature hot water in the first heat storage water tank is transported to the generator in the refrigeration unit. Inside the generator, water is evaporated and vaporized, enters the absorber through the countercurrent heat exchanger to form water vapor, and the remaining lithium bromide solution becomes a low-concentration solution. The evaporated water vapor then enters the condenser of the absorption refrigeration unit, where the temperature decreases and it condenses into liquid water. The cold released during this process can be used to cool the water in the air-conditioning system, thus achieving the purpose of cooling the substation. The condensed liquid water then enters the evaporator of the refrigeration unit, and its pressure is reduced through the throttle valve of the refrigeration unit and it evaporates and absorbs heat again to form cold.

[0035] As an optional embodiment, the above system further includes: a solar collector and a second heat storage water tank. Among them, the solar collector is used to heat the water stored in the second heat storage water tank; the output end of the second heat storage water tank is connected to the output end of the first heat storage water tank and is used to supplement heat to the water output from the first heat storage water tank when the temperature of the water output from the first heat storage water tank does not reach the preset threshold, where the preset thresholds corresponding to the first preset period and the second preset period are different.

[0036] Optionally, the solar collector utilizes solar energy to heat the water in the second hot water storage tank. It consists of a series of heat pipes or fluid pipes, which directly absorb solar radiation heat energy and convert this clean energy into heat energy to heat the water in the second hot water storage tank. The second hot water storage tank plays a role in heat energy storage and supplement in the system. It is connected to the output end of the first hot water storage tank. When the water temperature output from the first hot water storage tank does not reach the preset threshold required for the first preset period (such as summer cooling) or the second preset period (such as winter heating), the high-temperature hot water in the second hot water storage tank will be mixed with the water output from the first hot water storage tank to supplement heat for the water output from the first hot water storage tank, ensuring that the entire system can stably reach the temperature requirements for heating or cooling.

[0037] The preset threshold can be adjusted according to seasonal changes. During winter heating, the preset threshold is relatively low, possibly 40°C; during summer cooling, the preset threshold is relatively high, possibly 65°C. Through this dynamic supplement of heat energy, the system can more flexibly respond to the changes in heating and cooling demands at different seasons and time points.

[0038] As an optional embodiment, the above system further includes: a heat pump system, wherein the heat pump system is connected to the output end of the first hot water storage tank and is used to continue heating the water output from the first hot water storage tank when the temperature of the water output from the first hot water storage tank still does not reach the preset threshold after the second hot water storage tank supplements heat.

[0039] Optionally, the heat pump system is connected to the output end of the first hot water storage tank. Its function is that after the second hot water storage tank supplements heat, if the water temperature output from the first hot water storage tank still does not reach the preset threshold required by the system, the heat pump system will be activated to reheat the water output from the first hot water storage tank to ensure that the water temperature reaches the temperature required for the required heating or cooling working conditions. Specifically, in the second preset period (winter heating working condition), if the water temperature of the first hot water storage tank is lower than the preset temperature required for heating (such as 40°C), even if the second hot water storage tank has been heated and supplemented by the solar collector, but if the water temperature of the first hot water storage tank is still insufficient after supplementation, the heat pump system will be activated to continue raising the water temperature to meet the heating demand. And in the first preset period (summer cooling working condition), if the water temperature of the first hot water storage tank is lower than the preset temperature required for cooling (such as 65°C), the heat pump system also needs to be activated to raise the water temperature to an appropriate temperature to ensure that the refrigeration unit can operate normally and generate the required cooling capacity.

[0040] According to an embodiment of the present invention, an embodiment of a method for utilizing waste heat of a transformer is also provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0041] The method embodiment provided in the first embodiment of the present application can be executed in a mobile terminal, a computer terminal or a similar computing device. Figure 2 The hardware structure block diagram of a computer terminal for implementing the method for utilizing waste heat of a transformer is shown. Figure 2 As shown, the computer terminal 20 may include one or more (202a, 202b, ..., 202n are used to illustrate) processors (the processor may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA), a memory 204 for storing data. In addition, it may also include: a display, an input / output interface (I / O interface), a universal serial bus (USB) port (which may be included as one of the ports of the BUS bus), a network interface, a power supply and / or a camera. It can be understood by those skilled in the art that Figure 2 The structure shown is only for illustration and does not limit the structure of the above electronic device. Figure 2 More or fewer components as shown, or with Figure 2 Different configurations are shown.

[0042] It should be noted that the one or more processors and / or other data processing circuits described above may generally be referred to herein as "data processing circuits". The data processing circuits may be embodied in whole or in part as software, hardware, firmware, or any other combination thereof. In addition, the data processing circuit may be a single independent processing module, or may be incorporated in whole or in part into any of the other components in the computer terminal 20. As involved in the embodiments of the present application, the data processing circuit acts as a processor control (e.g., selection of a variable resistor terminal path connected to an interface).

[0043] The memory 204 can be used to store software programs and modules of application software, such as the program instructions / data storage device corresponding to the method for utilizing waste heat of transformers in the embodiment of the present invention. The processor executes various functional applications and data processing by running the software programs and modules stored in the memory 204, that is, the method for utilizing waste heat of transformers of the above-mentioned application program is realized. The memory 204 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 204 may further include a memory remotely arranged relative to the processor, and these remote memories may be connected to the computer terminal 20 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0044] The display can be, for example, a touch-screen liquid crystal display (LCD), which enables the user to interact with the user interface of the computer terminal 20.

[0045] Figure 3 It is a schematic flowchart of a method for utilizing waste heat of a transformer provided according to an embodiment of the present invention. As Figure 3 shown, the method includes the following steps:

[0046] Step S301, obtain the temperature of the water output from the first hot water storage tank, where the first hot water storage tank is located in the waste heat utilization system and is used to collect the waste heat of the target transformer.

[0047] In this step, the water temperature output from the first hot water storage tank is the basis for judging whether the system needs further heating or can be directly used for waste heat utilization. In the waste heat utilization system for a transformer, a temperature sensor is installed at the input end or the output end of the first hot water storage tank to continuously monitor the water temperature in the first hot water storage tank. These data are crucial for controlling the operation of the system. For example, it determines whether to start the heat pump system and whether to introduce the heat of the second hot water storage tank, etc. After obtaining the temperature of the water output from the first hot water storage tank, decisions can be made on the subsequent utilization of thermal energy according to the current season or working conditions requirements, and the preset temperature threshold.

[0048] Step S302, when the temperature of the water output from the first hot water storage tank reaches the preset threshold, provide heat for the refrigeration unit or the substation based on the water output from the first hot water storage tank, where the refrigeration unit is located in the waste heat utilization system and the target transformer is located in the substation.

[0049] In this step, the preset threshold can be set according to different requirements. For example, the preset threshold under the winter heating working condition corresponding to the second preset period can be set to 40 °C, while the preset threshold under the summer cooling working condition corresponding to the first preset period can be set to 65 °C. The threshold is set based on the operating efficiency of the system and the target requirements to ensure that the water temperature in the first hot water storage tank can meet the thermal energy requirements in different seasons.

[0050] A temperature sensor is installed at the output end of the first hot water storage tank to continuously monitor the water temperature. When it is detected that the temperature reaches or exceeds the preset threshold, this indicates that the first hot water storage tank has accumulated enough heat and can be directly used to drive the heating or cooling demand in the system. When the water temperature in the first hot water storage tank reaches or exceeds the preset threshold, the valves between the heat pump system and the solar collector and the first hot water storage tank will not be opened because the hot water temperature output from the first hot water storage tank at this time is sufficient to meet the demand. Next, the hot water in the first hot water storage tank directly enters the heat exchange device to provide heat for the refrigeration unit or the substation, thereby achieving efficient energy utilization.

[0051] Through the above steps, the purpose of using the collected waste heat for cooling the cooling unit or heating the substation is achieved, thereby realizing the technical effects of efficiently utilizing the waste heat of the transformer, improving the energy efficiency, and reducing the consumption. Furthermore, the technical problems of low energy utilization efficiency and unstable operation caused by the current waste heat utilization of the substation only in winter are solved.

[0052] As an alternative embodiment, when the waste heat utilization system includes a solar collector and a second hot water storage tank, it further includes: heating the water stored in the second hot water storage tank based on the solar collector; when the temperature of the water output from the first hot water storage tank does not reach the preset threshold, supplementing heat to the water output from the first hot water storage tank based on the second hot water storage tank to obtain the water after heat supplement; obtaining the temperature of the water after heat supplement; and providing heat to the cooling unit or the substation when the temperature of the water after heat supplement reaches the preset threshold.

[0053] Optionally, the solar collector is a device that converts solar energy into heat energy by using solar radiation. It is usually composed of multiple collector tubes or flat plates and can be used to heat the water stored in the second hot water storage tank. When sunlight is sufficient, the collector absorbs solar energy and transfers it to the water in the second hot water storage tank to increase the water temperature as an additional heat energy reserve. The second hot water storage tank is connected to the output end of the first hot water storage tank. Its main function is to supplement heat to the water output from the first hot water storage tank when the temperature of the water output from the first hot water storage tank does not reach the preset threshold. For example, if the water temperature in the first hot water storage tank is lower than the preset threshold (such as 40 °C), the hot water source in the second hot water storage tank can be used to mix the hot water with the water output from the first hot water storage tank by controlling the water pump and valve to raise the water temperature to the preset threshold. After the water in the second hot water storage tank is used to supplement the heat of the first hot water storage tank, continue to monitor the temperature of the water after heat supplement. Once the temperature of the water after heat supplement reaches the preset threshold, heat can be provided to the cooling unit or the substation according to the season and working conditions.

[0054] As an alternative embodiment, when the waste heat utilization system further includes a heat pump system, it further includes: heating the water after heat supplement based on the heat pump system when the temperature of the water after heat supplement does not reach the preset threshold to obtain the water after continuous heating; obtaining the temperature of the water after continuous heating; and providing heat to the cooling unit or the substation when the temperature of the water after continuous heating reaches the preset threshold.

[0055] Optionally, a heat pump system is a device that can extract heat from a low-temperature heat source and raise its temperature to a higher level by consuming a certain amount of energy (usually electrical energy). The heat pump system works in coordination with the first hot water storage tank and the second hot water storage tank. When the water temperature output from the first hot water storage tank still fails to reach the preset threshold even after the second hot water storage tank supplements heat, the heat pump system will be activated to heat the water after heat supplementation. This process will continue until the water temperature reaches the preset threshold.

[0056] Once the temperature of the water after continuous heating reaches the preset threshold, heat can be provided to the refrigeration unit or the substation according to the current heating or cooling demand. By setting the preset threshold, combining the auxiliary heating of the solar collector and the second hot water storage tank, and the heating capacity of the heat pump system, the energy utilization efficiency can be intelligently controlled and optimized. Even under the conditions of insufficient solar energy resources or unstable waste heat supply from the transformer, it can ensure continuous and stable heat supply to the refrigeration unit or the substation, reflecting its adaptability and high efficiency in a complex substation environment.

[0057] It should be noted that for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0058] Through the description of the above embodiments, those skilled in the art can clearly understand that the waste heat utilization method for transformers according to the above embodiments can be implemented by means of software plus a necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases, the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to enable a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in various embodiments of the present invention.

[0059] As an alternative embodiment, Figure 4 is a structural block diagram of a waste heat recovery and utilization system for a combined heat and cold supply substation of a solar combined heat pump system, as Figure 4As shown, the oil-immersed transformer 1 is one of the heat sources of the system. The heat energy generated during its operation will be transferred to the first hot water storage tank through oil-water heat exchange for subsequent heat energy utilization. The high-temperature oil of the transformer 1 flows through the plate heat exchanger 2, transferring heat to the water system to achieve heat exchange between oil and water. It is the bridge connecting the transformer 1 and the water system. The first hot water storage tank 3 stores the heat from the transformer 1 for subsequent heat supply. Under different working conditions, the water stored in the first hot water storage tank 3 will be pumped to the heat pump system or the refrigeration unit to meet the heating and cooling requirements of the substation. When there is sufficient sunlight, the solar collector 4 absorbs solar radiant energy, converts it into heat energy, and heats the water in the second hot water storage tank 27 as an additional heat energy reserve. The second hot water storage tank 27 stores the hot water heated by the solar collector 4. When the water temperature in the first hot water storage tank 3 is insufficient, the hot water in the second hot water storage tank 27 will be pumped to the first hot water storage tank 3 to supplement the heat. The heat pump system includes key components such as the heat pump evaporator 7, the compressor 8, the heat pump condenser 9, and the heat pump throttle valve 10. The heat pump system raises the water temperature in the first hot water storage tank 3 to a higher temperature. The absorption refrigeration unit includes parts such as the generator 15, the absorption refrigeration unit condenser 16, the absorption refrigeration unit throttle valve 17, and the absorption refrigeration unit evaporator 18. In summer, the unit uses the high-temperature hot water from the first hot water storage tank 3 as a heat source to generate cooling capacity to meet the requirements of the air conditioning system inside the substation. The water pump and valve system includes water pumps 5, 12, 20, 21, 22, make-up water pumps 23, 26, and valves 6, 11, 13, 14, 25, etc., which are used to control the flow of water between different components to ensure the efficient and stable operation of the system.

[0060] As an alternative embodiment, Figure 5 is a schematic diagram of the control logic of a waste heat recovery and utilization system provided according to an alternative embodiment of the present invention, as Figure 5 shown, in combination with the system structure as Figure 4 shown, the specific steps to achieve waste heat recovery and utilization are as follows:

[0061] The insulating oil flowing out of the oil-immersed transformer 1 enters the plate heat exchanger 2, and the water in the heat exchanger absorbs heat and then enters the hot water storage tank 3; at the same time, the solar collector 4 heats the hot water storage tank 27.

[0062] When there is a heating demand and the temperature sensor 28 is lower than a certain temperature (such as 40 °C), the water pump 24 is turned on to mix the hot water in the hot water storage tank 27 with the hot water storage tank 3. If the temperature sensor 29 is still lower than a certain temperature (such as 40 °C), the valve 6 is opened, the valve 11 is closed, and the heat pump system is started. Water enters the heat pump evaporator 7 through the pump 5. After the refrigerant absorbs heat, it is pressurized by the compressor 8 and flows into the heat pump condenser 9 to release heat. After passing through the throttle valve 10, it flows back into the evaporator 7 to continue absorbing heat, and works in such a cycle for heating.

[0063] When there is a heating demand and the temperature sensor 28 is lower than a certain temperature (such as 40 °C), the water pump 24 is turned on to mix the hot water in the hot water storage tank 27 with the hot water storage tank 3. If the temperature sensor 29 is higher than a certain temperature (such as 40 °C), the valve 6 is closed, the valve 11 is opened, and the high-temperature hot water directly supplies hot water. When the waste heat of the transformer alone makes the temperature of the hot water storage tank 3 higher than a certain temperature (such as 40 °C), that is, the temperature sensor 28 is higher than a certain temperature (such as 40 °C), the valve 6 and the water pump 24 are closed, the valve 11 is opened, and the high-temperature hot water directly supplies hot water.

[0064] When there is a cooling demand and the temperature sensor 28 is lower than a certain temperature (such as 65 °C), the water pump 24 is turned on to mix the hot water in the hot water storage tank 27 with the hot water storage tank 3. If the temperature sensor 29 is still lower than a certain temperature (such as 65 °C), the valve 6 is opened, the valve 11 is closed, and the heat pump system is started. After the water passes through the heat pump system, the high-temperature hot water flows out of the heat pump condenser 9 and enters the generator 15 as a high-temperature heat source. The water in the low-concentration lithium bromide solution is evaporated and vaporized. The water vapor enters the condenser 16. At the same time, the high-concentration lithium bromide solution flows into the absorber 19. The water vapor in the condenser 16 exchanges heat with the cooling water and cools and condenses, and then enters the evaporator 18 of the absorption refrigeration unit through the throttle valve 17 to vaporize and absorb heat. After that, the low-temperature water vapor enters the absorber 19 and is absorbed by the high-concentration lithium bromide solution, and then enters the generator 15 through the water pump 20 to complete the refrigeration cycle.

[0065] When there is a cooling demand and the temperature sensor 28 is lower than a certain temperature (such as 65 °C), the water pump 24 is turned on to mix the hot water in the hot water storage tank 27 with the hot water storage tank 3. If the temperature sensor 29 is higher than a certain temperature (such as 65 °C), the valve 6 is closed, the valve 11 is opened, and the high-temperature hot water directly enters the generator 15 as a high-temperature heat source, and then the refrigeration cycle is completed. When the temperature sensor 28 is higher than a certain temperature (such as 65 °C), the valve 6 and the water pump 24 are closed, the valve 11 is opened, and the high-temperature hot water enters the generator 15 to complete the refrigeration cycle.

[0066] Through the above steps, it can be used to supply domestic hot water or heat source for the substation and the surrounding area in winter, and in summer, it can supply cooling to the air conditioning system of the substation itself through an absorption chiller. This not only makes rational use of the waste heat of the transformer, but also improves the utilization rate of the heat pump, and solves the idle situation of the heat pump system during the cooling period. Through the solar collector and the hot water storage tank, the efficiency of waste heat recovery and utilization can be further improved, thereby enhancing the stability of the combined cooling and heating of the entire system. In addition, according to the above control logic, it is possible to give priority to ensuring the utilization of the waste heat of the transformer, and avoid the situation where the waste heat of the transformer cannot be dissipated due to the too high temperature of the solar collector.

[0067] According to an embodiment of the present invention, there is also provided a device for implementing the above method for utilizing waste heat of a transformer. Figure 6 FIG. is a structural block diagram of a device for utilizing waste heat of a transformer according to an embodiment of the present invention. As Figure 6 shown, the device for utilizing waste heat of a transformer includes: an acquisition module 61 and a heat supply module 62. The device for utilizing waste heat of a transformer will be described below.

[0068] The acquisition module 61 is configured to acquire the temperature of the water output by the first hot water storage tank, where the first hot water storage tank is located in the waste heat utilization system and is used to collect the waste heat of the target transformer.

[0069] The heat supply module 62 is connected to the acquisition module 61 and is configured to, when the temperature of the water output by the first hot water storage tank reaches a preset threshold, supply heat to the chiller or the substation based on the water output by the first hot water storage tank, where the chiller is located in the waste heat utilization system and the target transformer is located in the substation.

[0070] It should be noted here that the above acquisition module 61 and heat supply module 62 correspond to steps S301 to S302 in the embodiment. The instances and application scenarios implemented by multiple modules and the corresponding steps are the same, but are not limited to the content disclosed in the above embodiment. It should be noted that the above modules, as part of the device, can run in the computer terminal 20 provided in the embodiment.

[0071] An embodiment of the present invention can provide a computer device. Optionally, in this embodiment, the above computer device can be at least one network device among multiple network devices in a computer network. The computer device includes a memory and a processor.

[0072] Among them, the memory can be used to store software programs and modules, such as the program instructions / modules corresponding to the waste heat utilization method and device for transformers in the embodiments of the present invention. The processor executes various functional applications and data processing by running the software programs and modules stored in the memory, that is, implements the above-mentioned waste heat utilization method for transformers. The memory may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memories. In some instances, the memory may further include a memory remotely disposed relative to the processor, and these remote memories can be connected to the computer terminal through a network. Examples of the above network include but are not limited to the Internet, enterprise intranet, local area network, mobile communication network, and combinations thereof.

[0073] The processor can call the information and application programs stored in the memory through the transmission device to execute the following steps: obtaining the temperature of the water output from the first hot water storage tank, where the first hot water storage tank is located in the waste heat utilization system and is used to collect the waste heat of the target transformer; in the case where the temperature of the water output from the first hot water storage tank reaches a preset threshold, providing heat for the refrigeration unit or the substation based on the water output from the first hot water storage tank, where the refrigeration unit is located in the waste heat utilization system and the target transformer is located in the substation.

[0074] Optionally, the above processor may further execute the program code of the following steps: in the case where the waste heat utilization system includes a solar collector and a second hot water storage tank, it further includes: heating the water stored in the second hot water storage tank based on the solar collector; in the case where the temperature of the water output from the first hot water storage tank does not reach the preset threshold, supplementing heat for the water output from the first hot water storage tank based on the second hot water storage tank to obtain the water after heat supplement; obtaining the temperature of the water after heat supplement; in the case where the temperature of the water after heat supplement reaches the preset threshold, providing heat for the refrigeration unit or the substation.

[0075] Optionally, the above processor may further execute the program code of the following steps: in the case where the waste heat utilization system further includes a heat pump system, it further includes: in the case where the temperature of the water after heat supplement does not reach the preset threshold, heating the water after heat supplement based on the heat pump system to obtain the water after continuous heating; obtaining the temperature of the water after continuous heating; in the case where the temperature of the water after continuous heating reaches the preset threshold, providing heat for the refrigeration unit or the substation.

[0076] Embodiments of the present invention provide a waste heat utilization system for a transformer. Through a heat exchanger, a first hot water storage tank, and a refrigeration unit, wherein the input end of the heat exchanger is connected to the target transformer for extracting the waste heat of the target transformer and transmitting it to the first hot water storage tank; the input end of the first hot water storage tank is connected to the heat exchanger, and the output end of the first hot water storage tank is connected to the refrigeration unit, which is used to provide heat for the refrigeration unit within a first preset period and also used to provide heat for the substation where the target transformer is located within a second preset period; the refrigeration unit is used to provide cooling based on the heat provided by the first hot water storage tank within the first preset period, achieving the purpose of using the collected waste heat for the cooling of the refrigeration unit or the heating of the substation, thereby realizing the technical effects of efficiently utilizing the waste heat of the transformer, improving energy efficiency, and reducing consumption, and further solving the technical problems of low energy utilization efficiency and unstable operation caused by the waste heat utilization of the current substation only in winter.

[0077] Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing the relevant hardware of the terminal device through a program, and the program can be stored in a non-volatile storage medium. The storage medium can include: a flash drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disc, etc.

[0078] Embodiments of the present invention also provide a non-volatile storage medium. Optionally, in this embodiment, the above non-volatile storage medium can be used to store the program code executed by the waste heat utilization method for the transformer provided in the above embodiment.

[0079] Optionally, in this embodiment, the above non-volatile storage medium can be located in any computer terminal in a computer terminal group in a computer network or in any mobile terminal in a mobile terminal group.

[0080] Optionally, in this embodiment, the non-volatile storage medium is set to store program code for performing the following steps: obtaining the temperature of the water output from the first hot water storage tank, where the first hot water storage tank is located in the waste heat utilization system and is used to collect the waste heat of the target transformer; when the temperature of the water output from the first hot water storage tank reaches a preset threshold, providing heat for the refrigeration unit or the substation based on the water output from the first hot water storage tank, where the refrigeration unit is located in the waste heat utilization system and the target transformer is located in the substation.

[0081] Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for performing the following steps: When the waste heat utilization system includes a solar collector and a second hot water storage tank, it further includes: heating the water stored in the second hot water storage tank based on the solar collector; when the temperature of the water output from the first hot water storage tank does not reach the preset threshold, supplementing heat to the water output from the first hot water storage tank based on the second hot water storage tank to obtain water with supplemented heat; obtaining the temperature of the water with supplemented heat; and when the temperature of the water with supplemented heat reaches the preset threshold, providing heat to the refrigeration unit or the substation.

[0082] Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for performing the following steps: When the waste heat utilization system further includes a heat pump system, it further includes: when the temperature of the water with supplemented heat does not reach the preset threshold, heating the water with supplemented heat based on the heat pump system to obtain continuously heated water; obtaining the temperature of the continuously heated water; and when the temperature of the continuously heated water reaches the preset threshold, providing heat to the refrigeration unit or the substation.

[0083] An embodiment of the present invention further provides a computer program product, including a computer program. Optionally, in this embodiment, when the computer program is executed by a processor, it can implement: obtaining the temperature of the water output from the first hot water storage tank, where the first hot water storage tank is located in the waste heat utilization system and is used to collect the waste heat of the target transformer; when the temperature of the water output from the first hot water storage tank reaches the preset threshold, providing heat to the refrigeration unit or the substation based on the water output from the first hot water storage tank, where the refrigeration unit is located in the waste heat utilization system and the target transformer is located in the substation.

[0084] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0085] In the above embodiments of the present invention, the descriptions of the respective embodiments have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0086] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only illustrative. For example, the division of the units can be a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of the units or modules can be in electrical or other forms.

[0087] The unit described as a separation component may or may not be physically separated. The component shown as a unit may or may not be a physical unit, that is, it may be located in one place or distributed over multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0088] In addition, in each embodiment of the present invention, each functional unit can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0089] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a non-volatile storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present invention. The foregoing storage medium includes: USB flash drives, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), mobile hard disks, magnetic disks or optical discs and other various media that can store program codes.

[0090] The above is only the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A waste heat utilization system for a transformer, characterized in that: include: Heat exchanger, first hot water storage tank, refrigeration unit, wherein, The input end of the heat exchanger is connected to the target transformer, and is used to extract the waste heat of the target transformer and transmit it to the first hot water storage tank; The input end of the first hot water storage tank is connected to the heat exchanger, and the output end of the first hot water storage tank is connected to the refrigeration unit, and is used to provide heat for the refrigeration unit in a first preset period, and is also used to provide heat for the substation where the target transformer is located in a second preset period; The refrigeration unit is used to provide cooling based on the heat provided by the first hot water storage tank during the first preset period.

2. The system according to claim 1, characterized in that Also includes: Solar thermal collector and second hot water storage tank, wherein, The solar thermal collector is used to heat the water stored in the second hot water storage tank; The output end of the second hot water storage tank is connected to the output end of the first hot water storage tank, and is used to supplement heat for the water output by the first hot water storage tank when the temperature of the water output by the first hot water storage tank does not reach a preset threshold, wherein the preset thresholds corresponding to the first preset period and the second preset period are different.

3. The system according to claim 2, characterized in that Also includes: Heat pump system, wherein The heat pump system is connected to the output end of the first hot water storage tank, and is used to continue heating the water output by the first hot water storage tank when the temperature of the water output by the first hot water storage tank does not reach the preset threshold after the second hot water storage tank supplements heat.

4. A method for utilizing waste heat of a transformer, characterized in that: The waste heat utilization system applied to any one of claims 1 to 3 comprises: Acquiring the temperature of water outputted by a first hot water storage tank, wherein the first hot water storage tank is located in a waste heat utilization system and is used to collect waste heat of a target transformer; When the temperature of water output by the first hot water storage tank reaches a preset threshold, heat is provided to a refrigeration unit or a substation based on the water output by the first hot water storage tank, wherein the refrigeration unit is located in the waste heat utilization system and the target transformer is located in the substation.

5. The method according to claim 4, characterized in that In the case where the waste heat utilization system includes a solar collector and a second hot water storage tank, it also includes: heating the water stored in the second hot water storage tank based on the solar thermal collector; When the temperature of the water output from the first hot water storage tank does not reach the preset threshold, the water output from the first hot water storage tank is supplemented with heat based on the second hot water storage tank to obtain water with supplemented heat; Obtaining the temperature of the water after the heat is added; When the temperature of the water after the heat supplement reaches the preset threshold, heat is provided to the refrigeration unit or the substation.

6. The method according to claim 5, characterized in that When the waste heat utilization system further includes a heat pump system, it further includes: When the temperature of the water after the heat supplementation does not reach the preset threshold, heating the water after the heat supplementation based on the heat pump system to obtain further heated water; Obtaining the temperature of the water after the continued heating; When the temperature of the water after continued heating reaches the preset threshold, heat is provided to the refrigeration unit or the substation.

7. A waste heat utilization device for a transformer, characterized in that: include: An acquisition module, used to acquire the temperature of water output by a first hot water storage tank, wherein the first hot water storage tank is located in a waste heat utilization system and is used to collect waste heat of a target transformer; A heating module is used to provide heat for a refrigeration unit or a substation based on the water output by the first hot water storage tank when the temperature of the water output by the first hot water storage tank reaches a preset threshold, wherein the refrigeration unit is located in the waste heat utilization system and the target transformer is located in the substation.

8. A non-volatile storage medium, characterized in that: The non-volatile storage medium includes a stored program, wherein when the program is executed, the device where the non-volatile storage medium is located is controlled to execute the method for utilizing waste heat for a transformer as claimed in any one of claims 4 to 6.

9. A computer device, characterized in that: include: Memory and processor, The memory stores a computer program; The processor is used to execute the computer program stored in the memory, and when the computer program is running, the processor executes the method for utilizing waste heat for a transformer as claimed in any one of claims 4 to 6.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the method for utilizing waste heat of a transformer as claimed in any one of claims 4 to 6 is implemented.

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