Mobile electric cold storage phase change cold storage transformer cooling system and operation method

Abstract

The invention discloses a mobile electric cold storage phase change cold storage transformer cooling system and an operation method, and belongs to the technical field of transformer cooling, the system comprises a phase change cold storage cabinet, a refrigeration device communicated with the phase change cold storage cabinet, and a controller connected with the refrigeration device; the heat exchange medium is stored in the phase change ice storage cabinet; the phase change ice storage cabinet and the refrigerating device are both connected with temperature sensors; the phase-change ice storage cabinet is connected with an air conditioner, a fan, an atomizer and a water storage tank; the water storage tank is arranged in the refrigerating device, and the refrigerating device is communicated with the phase change ice storage cabinet through the water storage tank to form circulation; the controller is electrically connected with the temperature sensor, the fan and the atomizer and used for obtaining temperature data collected by the temperature sensor and controlling starting and stopping of the refrigerating device, the fan and the atomizer according to a preset temperature interval, and cascade cooling is achieved. The problems that a finned radiator or an air cooler for a transformer is low in heat dissipation efficiency and poor in flexibility when running under the conditions of high environment temperature and large load are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of transformer cooling, and in particular relates to a mobile electric cold storage phase change cold storage transformer cooling system and an operating method. Background Art

[0002] With the rapid development of power systems and the continuous growth of power demand, large transformers have gradually become an indispensable part of power transmission and distribution. During the operation of the transformer, because a large amount of current flows through the core and windings, the heat caused by a large amount of power conversion will affect its performance stability and may also cause equipment damage or even failure. Therefore, the development of transformer heat dissipation technology is extremely critical.

[0003] At present, in order to ensure the normal heat dissipation of the main transformer of the substation, the main method is to install a plate radiator or air cooler as an accessory on the outside of the transformer to enhance the heat dissipation of the main transformer. The plate radiator or air cooler uses the buoyancy generated by gravity and density difference to realize the circulation of transformer oil. The transformer oil is heated up due to the heat generated by the operation of the transformer. The density of the hot oil is small and it flows upward to the top of the transformer and enters the upper oil collecting pipe of the plate radiator or air cooler. The heat is taken away by the air. The density of the cooled transformer oil increases and flows from top to bottom through the heat sink into the lower oil collecting pipe of the plate radiator or air cooler, and then flows back to the transformer to participate in the circulation. The upper part has an uneven contact surface with the air, resulting in poor heat dissipation effect.

[0004] In the prior art, in order to improve the heat dissipation efficiency of the fin radiator or the air cooler, measures such as flushing, blowing, and preventing ice cubes are often used. The above measures have low cooling efficiency and relatively limited effects. Summary of the invention

[0005] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a mobile electric cold storage phase change cold storage transformer cooling system and operation method, so as to solve the technical problems of low heat dissipation efficiency and poor flexibility of the plate radiator or air cooler for the transformer when operating under high ambient temperature and high load conditions.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: The invention discloses a mobile electric cold storage phase change cold storage transformer cooling system, comprising: a phase change cold storage cabinet, a refrigeration device connected to the phase change cold storage cabinet, and a controller connected to the refrigeration device; a heat exchange medium is stored in the phase change cold storage cabinet; The phase change cold storage cabinet and the refrigeration device are both connected with temperature sensors; The phase-change cold storage cabinet is connected with an air conditioner, a fan, an atomizer and a water storage tank; the water storage tank is arranged inside the refrigeration device, and the refrigeration device is connected with the phase-change cold storage cabinet through the water storage tank to form a circulation; The controller is electrically connected to the temperature sensor, fan and atomizer respectively, and is used to obtain temperature data collected by the temperature sensor, and control the start and stop of the refrigeration device, fan and atomizer according to a preset temperature range to achieve stepped cooling.

[0007] Preferably, the output port of the water storage tank is connected to the input port of the atomizer to provide cooling water for the atomizer.

[0008] Preferably, the phase change cold storage cabinet is connected to the air conditioner to form a circulation, and the air supply pipe of the air conditioner is connected to the air intake pipe of the phase change cold storage cabinet.

[0009] Preferably, the phase change cold storage cabinet and the refrigeration device are connected through a pipeline, and a valve and a circulating water pump are provided on the pipeline.

[0010] Preferably, it also includes a water replenishment tank connected to the phase change cold storage cabinet.

[0011] Further preferably, the phase change cold storage cabinet is connected to the water supply tank through a pipeline, and a valve and a circulating water pump are provided on the pipeline.

[0012] Preferably, a U-shaped coil is provided in the phase change cold storage cabinet, and a composite phase change material for storing cold is provided in the U-shaped coil; both ends of the U-shaped coil are connected to the air conditioner, cold air enters from one end, and heat is output from the other end.

[0013] Preferably, the phase change cold storage cabinet and the refrigeration device are both arranged on the vehicle body.

[0014] The present invention also discloses an operating method of the above-mentioned mobile electric cold storage phase change cold storage transformer cooling system, comprising the following steps: 1) Cold storage mode After the system is started, the phase-change cold storage cabinet is connected to the air conditioner, and a cold air circulation is formed through the air supply pipe and the air intake pipe of the air conditioner; the cold air enters the phase-change cold storage cabinet for the cold storage process; 2) Phase change cold storage cabinet cooling preparation When cooling is required, ensure that the phase-change cold storage cabinet is connected to the water storage tank and the atomizer through the connecting pipe; at the same time, the phase-change cold storage cabinet is connected to the refrigeration device through the connecting pipe to provide cooling water source for the gradient cooling mode; 3) Temperature monitoring and cascade cooling judgment The controller continuously obtains the wall temperature of the transformer plate heat sink or air cooler collected by the temperature sensor; according to the preset temperature range, the controller determines the cooling equipment and mode that needs to be started; 4) Stepped cooling mode When the temperature is in the first preset temperature range, the controller starts the refrigeration device and the fan for preliminary cooling; if the temperature continues to rise and enters the second preset temperature range, the controller simultaneously starts the atomizer to further reduce the ambient air temperature by evaporating water vapor; 5) Gradient cooling mode In the gradient cooling mode, the controller automatically adjusts the operating state of the cooling equipment according to the temperature change; when the temperature is in the first preset temperature range, the controller flows cooling water from the phase change cold storage cabinet into the water storage tank, and starts the refrigeration device and the fan; when the temperature enters the second preset temperature range, the controller starts the atomizer; when the temperature drops below the second preset temperature range but above the first preset temperature range, the controller turns off the atomizer and keeps the fan running; when the temperature drops to the third preset temperature range, the controller turns off the refrigeration device and the fan to complete the cooling process; 6) System monitoring and maintenance During the entire operation process, the controller continuously monitors the system status to ensure the normal operation of each component; Regularly check the phase change cold storage cabinet, refrigeration unit, fan, atomizer and water tank to ensure long-term stable operation of the system.

[0015] Preferably, a U-shaped coil is provided in the phase change cold storage cabinet, and a composite phase change material for storing cold is provided in the U-shaped coil; after the cold air enters the U-shaped coil in the phase change cold storage cabinet, the composite phase change material starts to absorb and store the cold air.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a mobile electric cold storage phase change cold storage transformer cooling system, wherein the temperature sensor is used to monitor and collect the temperature of the heat exchange medium in the phase change cold storage cabinet; the phase change cold storage cabinet can be used to provide cold capacity for a long time and over a long distance; the refrigeration device is used to provide cold capacity to act around the plate radiator or air cooler for the transformer to reduce its temperature; the fan is used to provide cold air to accelerate the air flow around the plate radiator or air cooler for the transformer; the atomizer is used to provide cold mist to absorb heat through water vapor evaporation to reduce the air temperature around the plate radiator or air cooler for the transformer; the water storage tank is used to store water; the controller is used to obtain the wall temperature of the plate radiator or air cooler for the transformer collected by the temperature sensor to control the start and stop and gear selection of the refrigeration device, the fan and the atomizer to achieve stepped cooling. The cascade cooling method is adopted, and a temperature sensor and a controller are provided; wherein, when the wall temperature of the plate radiator or air cooler monitored by the temperature sensor is in the first preset temperature range of the controller, the valve and the circulating water pump are opened to allow the cooled water to flow from the phase change cold storage cabinet into the water storage tank through the connecting pipe, and the refrigeration device and the fan are started for cooling; when the wall temperature of the plate radiator or air cooler is in the second preset temperature range of the controller, the refrigeration device, the fan and the atomizer are started at the same time for cooling; the cascade cooling method provided by the present invention is more economical and has a more significant cooling effect. The technical problem of low heat dissipation efficiency and poor flexibility of the plate radiator or air cooler for transformers when operating under high ambient temperature and high load conditions is solved; at the same time, the phase change latent heat of the phase change material is used for cold storage, which realizes the time-space conversion of energy, helps the power grid to reduce peaks and fill valleys, and promotes the consumption of new energy. Specifically, by using a phase change cold storage cabinet and utilizing the latent heat characteristics of phase change materials to store cold, the power equipment capacity of the chiller can be reduced, the pipe size can be reduced, and the power consumption of the pump can be reduced during cold transport. At the same time, the operation mode of the device is more diverse, and the load of the refrigeration device and the phase change cold storage cabinet can be most reasonably allocated according to the load demand and electricity price policy, thereby maximizing the savings in operating costs.

[0017] Furthermore, in the present invention, both the refrigeration device and the phase-change cold storage cabinet are vehicle-mounted mobile equipment, and the usage scenarios are more flexible. During off-peak electricity season, the power plant air conditioner can be used to charge multiple phase-change cold storage cabinets at the same time, and during peak electricity season, the phase-change cold storage cabinet can be used to provide cooling, thereby shifting the electricity load during peak periods, realizing the time-space conversion of energy, helping the power grid to reduce peak loads and fill valleys, and promoting the consumption of new energy. In addition, the proportion of cooling equipment operating at full load is increased, the state is stable, and the utilization rate of the equipment is improved.

[0018] The operating method of the mobile electric cold storage phase change cold storage transformer cooling system provided by the present invention can realize efficient cooling of the transformer by combining phase change cold storage and multiple cooling modes (step cooling and gradient cooling). The cold storage characteristics of the phase change material make the cooling process more stable and durable, while the step and gradient cooling modes can be accurately adjusted according to the actual temperature of the transformer to avoid energy waste. The system is designed with multiple cooling modes, which can be flexibly switched according to the actual working conditions of the transformer to meet the cooling needs under different temperature conditions. This flexibility enables the system to adapt to various complex operating environments and improves the applicability and reliability of the cooling system. The phase change cold storage technology can use the low-valley electricity price period at night to store cold and release cold during the day, which helps to reduce the peak-valley difference of the power grid and reduce power waste. At the same time, the precise cooling of the system also reduces unnecessary energy consumption, which is in line with the environmental protection concept of energy saving and emission reduction. The system structure is clear, and the connection between the components is simple, which is convenient for daily maintenance and repair. The design of components such as phase change cold storage cabinets, refrigeration devices, and water storage tanks takes into account factors such as easy maintenance and replacement, reducing the maintenance cost of the system. By precisely controlling the temperature of the transformer, the present invention can effectively prevent the transformer from being damaged due to overheating and extend its service life. This is of great significance for the stable operation of the power system and reducing the cost of equipment replacement. The operating method of the mobile electric cold storage phase change cold storage transformer cooling system provided by the present invention not only improves the cooling efficiency, but also enhances the flexibility and adaptability of the system, achieves the goal of energy conservation and emission reduction, while reducing maintenance costs and extending the service life of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the mobile electric cold storage phase change cold storage transformer cooling system disclosed in Example 1 of the present invention operating in the cold storage mode; Figure 2 It is a schematic diagram of the mobile electric cold storage phase change cold storage transformer cooling system disclosed in Example 2 of the present invention operating in the phase change cold storage cabinet cooling mode; Figure 3 It is a schematic diagram of the mobile electric cold storage phase change cold storage transformer cooling system disclosed in Example 3 of the present invention operating in a gradient cooling mode; Among them: 1. Temperature sensor; 2. Phase change cold storage cabinet; 3. Refrigeration device; 4. Controller; 5. Fan; 6. Atomizer; 7. Water supply tank; 8. Valve; 9. Circulating water pump; 10. Water storage tank; 01. Composite phase change material; 02. Heat exchange medium. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings: The present invention provides a transformer cooling system coupled with phase change cold storage, comprising: a temperature sensor 1, a phase change cold storage cabinet 2, a refrigeration device 3, a controller 4, a fan 5, an atomizer 6 and a water storage tank 10; wherein the temperature sensor 1, the refrigeration device 3, the controller 4, the fan 5, the atomizer 6 and the water storage tank 10 are arranged in a preset area around the phase change cold storage cabinet 2; the temperature sensor 1 is used to monitor and collect the temperature of the heat exchange medium 02 in the cold storage cabinet; the phase change cold storage cabinet 2 is used to provide cold for a long time and over a long distance; the refrigeration device 3 is used to provide cold to act around a plate radiator or an air cooler for the transformer to reduce its temperature; the controller 4 is used to obtain the temperature sensor 1 The wall temperature of the plate radiator or air cooler for the transformer is collected to control the start and stop of the refrigeration device 3, the fan 5 and the atomizer 6 to achieve stepped cooling; the fan 5 is used to provide cold air to accelerate the air flow around the plate radiator or air cooler for the transformer; preferably, the number of fans 5 is multiple; the atomizer 6 is used to provide cold mist to absorb heat through water vapor evaporation to reduce the air temperature around the plate radiator or air cooler for the transformer; preferably, the number of atomizing nozzles 6 is multiple; the water tank 10 is used to store water, the water tank 10 is located inside the refrigeration device 3, and the water tank 10 is connected to the second output port and the second output port of the phase change cold storage cabinet 2.

[0022] The output port of the temperature sensor 1 is connected to the third input port of the phase change cold storage cabinet 2; the first input port of the phase change cold storage cabinet 2 is connected to the external air conditioner; the first output port of the phase change cold storage cabinet 2 is connected to the external air conditioner; the second output port of the phase change cold storage cabinet 2 is connected to the first input port of the water tank 10 through a connecting pipe; the second input port of the phase change cold storage cabinet 2 is connected to the first output port of the water tank 10 through a connecting pipe; the output port of the temperature sensor 1 is connected to the second input port of the water tank 10; the second output port of the water tank 10 is connected to the input port of the atomizer 6. In the preferred embodiment, a valve 8 and a circulating water pump 9 are provided on the connecting pipe.

[0023] A further preferred technical solution of the embodiment of the present invention also includes a valve 8 and a circulating water pump 9; a valve 8 and a circulating water pump 9 are provided on the connecting pipe for water supply between the phase change cold storage cabinet 2 and the refrigeration device 3; a valve 8 and a circulating water pump 9 are provided on the connecting pipe for water supply between the phase change cold storage cabinet 2 and the water supply tank 7.

[0024] In a further preferred technical solution of the embodiment of the present invention, it also includes a water replenishment tank 7; the water replenishment tank 7 is connected to the fourth input port of the phase change cold storage cabinet 2.

[0025] A further preferred technical solution of the embodiment of the present invention further includes a controller 4; the controller 4 is used to receive and process the wall temperature of the plate heat sink or air cooler for the transformer obtained by the temperature sensor 1, and control the start, stop and other adjustments of the refrigeration device 3, the fan 5 and the atomizer 6.

[0026] In the technical solution disclosed in the embodiment of the present invention, the phase change cold storage cabinet 2 is used to prepare chilled water; the water storage tank 10 of the refrigeration device 3 is used to store the cold of the chilled water prepared by the phase change cold storage cabinet 2; the phase change cold storage cabinet 2, the water storage tank 10 and the atomizer 6 are interconnected by pipelines to form a closed circulation system.

[0027] For further explanation, valve 8 is used to control the connection or closure of the water pipe; further preferably, valve 8 can be a solenoid valve or a pneumatic valve; the circulating water pump 9 is used to circulate the fluid in the connecting pipeline; the water replenishment tank 7 is used to replenish the liquid lost in the system; the liquid in the water replenishment tank 7 is the heat exchange medium 02, generally water.

[0028] The mobile electric cold storage phase change cold storage transformer cooling system provided in the embodiment of the present invention solves the technical problems of low heat dissipation efficiency and poor flexibility of plate-type heat sinks or air coolers for transformers when operating under high ambient temperature and high load conditions; a vehicle-mounted operation mode is designed on the basis of existing technologies to improve the cooling efficiency; at the same time, the phase change latent heat of phase change materials is used to store cold, thereby realizing the space-time conversion of energy, which helps to reduce peak loads and fill valleys in the power grid and promote the consumption of new energy.

[0029] In a further preferred technical solution of the embodiment of the present invention, the composite phase change material 01 (CPCM) is prepared by a melt blending method, sodium sulfate decahydrate (SSD) is used as the main phase change material, borax (STD) is used as a nucleating agent to reduce supercooling, polyacrylamide (PAM) is used as a thickener to improve phase separation, and ammonium chloride (NH4Cl) is used to adjust the phase change temperature of the composite phase change material 01; in addition, the prepared composite phase change material 01 is filled in a U-shaped coil, and the U-shaped coil is fixed in the phase change cold storage cabinet 2.

[0030] To explain by specific example, a U-shaped coil is provided in the phase change cold storage cabinet 2. The material inside the U-shaped coil that contacts the phase change material does not react with the composite phase change material 01. The composite phase change material 01 is filled in the U-shaped coil. Both the head and tail of the U-shaped coil are connected to the air conditioner of the power plant. Cold air enters from one end and heat is output from the other end.

[0031] In a further preferred technical solution of the embodiment of the present invention, the phase change cold storage cabinet 2 and the refrigeration device 3 are both arranged on a flatbed vehicle body, which can be carried and moved by a small or medium-sized truck, flexibly providing cooling, improving the cooling efficiency of the transformer, and can be cyclically operated between different working areas.

[0032] In a further preferred technical solution of the embodiment of the present invention, a step-by-step cooling method is implemented by controlling the controller 4; wherein, when the wall temperature of the plate-type heat sink or air cooler for the transformer monitored by the temperature sensor 1 is in the first preset temperature range of the controller 4, the controller 4 is started, and the fan 5 is started to blow air, thereby enhancing air flow, circulating heat dissipation, and reducing the temperature of the plate-type heat sink or air cooler for the transformer.

[0033] When the wall temperature of the plate-type radiator or air cooler for the transformer monitored by the temperature sensor 1 is in the second preset temperature range of the controller 4, the controller 4 is started, the circulating water pump 9 is turned on, and the chilled water prepared by the phase change cold storage cabinet 2 is transported to the water storage tank 10 in the refrigeration device 3 through the connecting pipe, and the fan 5 and the atomizer 6 are started. The chilled water exchanges heat with the air around the plate-type radiator or air cooler for the transformer through the atomizer 6 to achieve a cooling effect.

[0034] When the wall temperature of the plate-type heat sink or air cooler for the transformer monitored by the temperature sensor 1 drops to a temperature lower than the second preset temperature range of the controller 4, the controller 4 controls the atomizer 6 to turn off; when the wall temperature of the plate-type heat sink or air cooler for the transformer monitored by the temperature sensor 1 drops to a temperature lower than the first preset temperature range of the controller 4, the fan 5 and the phase change cold storage cabinet 2 are turned off.

[0035] For further explanation, valves 8 and circulating water pumps 9 are provided on the connecting pipes for conveying chilled water. The mobile electric cold storage phase change cold storage transformer cooling system has three operating modes; among them, The first is the cold storage mode: the phase change cold storage cabinet 2 is connected to the air conditioner, the air supply pipe of the air conditioner is connected to the air intake pipe of the phase change cold storage cabinet 2, and the air intake pipe of the air conditioner is connected to the air supply pipe of the phase change cold storage cabinet 2. When the cold air enters the U-shaped coil through the pipe, the composite phase change material 01 absorbs the cold air and starts to store cold.

[0036] The second is the phase change cold storage cabinet cooling mode: the phase change cold storage cabinet 2 is connected to the water storage tank 10 and the atomizer 6 through a connecting pipe.

[0037] The third is a gradient energy supply mode: the phase change cold storage cabinet 2 is connected to the refrigeration device 3 through a connecting pipe; using a stepped energy supply method, the phase change cold storage cabinet 2 is connected to the refrigeration device 3 through a connecting pipe, the refrigeration device 3 is connected to the fan 5 and the atomizer 6 through a connecting pipe, the phase change cold storage cabinet 2 is connected to the water supply tank 7 through a water supply pipe, and the phase change cold storage cabinet 2 is connected to the water storage tank 10 through a connecting pipe.

[0038] The present invention discloses an operating method of a mobile electric cold storage phase change cold storage transformer cooling system, comprising: In the cold storage mode, the phase change cold storage cabinet 2 is connected to the air conditioner, the air supply pipe of the air conditioner is connected to the air intake pipe of the phase change cold storage cabinet 2, and the air intake pipe of the air conditioner is connected to the air supply pipe of the phase change cold storage cabinet 2. When the cold air enters the U-shaped coil through the pipe, the composite phase change material 01 absorbs the cold air and starts to store cold.

[0039] In the cooling mode of the phase-change cold storage cabinet, the phase-change cold storage cabinet 2 is connected to the water storage tank 10 and the atomizer 6 through a connecting pipe; a stepped cooling method is adopted.

[0040] In the gradient cooling mode, the phase change cold storage cabinet 2 is connected to the refrigeration device 3 through a connecting pipe; a stepped energy supply method is adopted.

[0041] Among them, the gradient energy supply method is: When the collected wall temperature of the transformer plate radiator or air cooler is in the first preset temperature range, open the valve 8 and the circulating water pump 9 to allow the cooled water to flow from the phase change cold storage cabinet 2 into the water storage tank 10 through the connecting pipe, and start the refrigeration device 3 and the fan 5 for cooling.

[0042] When the collected wall temperature of the plate-type radiator or air cooler for the transformer is in the second preset temperature range, the refrigeration device 3, the fan 5 and the atomizer 6 are started simultaneously for cooling; wherein, the chilled water stored in the refrigeration device 3 and prepared by the phase change cold storage cabinet 2 is transported to the atomizer 6 through a connecting pipe, and the temperature of the hot air around the plate-type radiator or air cooler for the transformer is reduced by evaporation of water vapor.

[0043] When the wall temperature of the transformer plate heat sink or air cooler to be collected drops to a temperature lower than the second preset temperature range but higher than the first preset temperature range, the atomizer 6 is controlled to be closed.

[0044] When the wall temperature of the transformer plate heat sink or air cooler to be collected drops below the first preset temperature range, that is, is in the third preset temperature range, the refrigeration device 3 and the fan 5 are controlled to be turned off.

[0045] Example 1 A mobile electric cold storage phase change cold storage transformer cooling system, which operates in cold storage mode, includes a temperature sensor 1, a phase change cold storage cabinet 2, a refrigeration device 3, and a water supply tank 7; wherein the first operation mode is the cold storage mode: the phase change cold storage cabinet 2 is connected to the air conditioner, the air supply pipe of the air conditioner is connected to the air intake pipe of the phase change cold storage cabinet 2, and the air intake pipe of the air conditioner is connected to the air supply pipe of the phase change cold storage cabinet 2. When the cold air enters the U-shaped coil through the pipe, the composite phase change material 01 absorbs the cold air and starts to store cold. The water supply tank 7 is replenished in time when the liquid level is insufficient.

[0046] See also Figure 1 , Figure 1 It is a schematic diagram of the mobile electric cold storage phase change cold storage transformer cooling system disclosed in Example 1 of the present invention operating in the cold storage mode; in the technical solution provided by Example 1 of the present invention, the phase change cold storage cabinet 2 stores cold through the power plant air conditioner, and uses valley electricity to make the air conditioner release cold energy, and the cold energy enters the U-shaped coil in the phase change cold storage cabinet 2 through the connecting pipe, and the phase change material set in the coil absorbs the cold energy and stores it. The phase change cold storage cabinet 2 is set on a flatbed vehicle body and can be carried and moved by a small or medium-sized truck for long-distance cold storage or cold supply.

[0047] Example 2 A mobile electric cold storage phase change cold storage transformer cooling system operates in a phase change cold storage cabinet cooling mode, including a temperature sensor 1, a phase change cold storage cabinet 2, a refrigeration device 3, a controller 4, a fan 5, an atomizer 6, a water supply tank 7, a valve 8, a circulating water pump 9 and a water storage tank 10; wherein, the second operating mode is the phase change cold storage cabinet cooling mode: the phase change cold storage cabinet 2 is connected to the water storage tank 10 and the atomizer 6 through a connecting pipe.

[0048] See also Figure 2 , Figure 2It is a schematic diagram of the mobile electric cold storage phase change cold storage transformer cooling system disclosed in Example 2 of the present invention operating in the phase change cold storage cabinet cooling mode; in the technical solution provided by Example 2 of the present invention, the phase change cold storage cabinet 2 and the refrigeration device 3 are both movable devices. During valley electricity, the air conditioner provides cold energy for the phase change cold storage cabinet 2 to store cold energy. When in use, the chilled water prepared by the phase change cold storage cabinet 2 flows through the connecting pipe to the water storage tank 10 in the refrigeration device 3. By utilizing the latent heat characteristics of the phase change material for cold storage, cold energy can be stored across time while utilizing valley electricity, and the phase change cold storage cabinet 2 and the refrigeration device 3 are both movable devices, which can transport cold energy over long distances and improve the transportation efficiency.

[0049] Example 3 A mobile electric cold storage phase change cold storage transformer cooling system operates in a third operating mode, including a temperature sensor 1, a phase change cold storage cabinet 2, a refrigeration device 3, a controller 4, a fan 5, an atomizer 6, a water supply tank 7, a valve 8, a circulating water pump 9 and a water storage tank 10; wherein the third mode is a gradient cooling mode: the phase change cold storage cabinet 2 is connected to the refrigeration device 3 through a connecting pipe; at the same time, a stepped cooling mode is adopted.

[0050] See also Figure 3 , Figure 3 It is a schematic diagram of the mobile electric cold storage phase change cold storage transformer cooling system disclosed in Example 3 of the present invention operating in a gradient cooling mode; in the technical solution provided in Example 3 of the present invention, the third operating mode shifts the power consumption time of the air conditioner by shaving peaks and filling valleys through the phase change cold storage cabinet 2, which plays a role in shifting the power load during peak periods of electricity, and the increase in cooling equipment improves the heat dissipation efficiency of the plate radiator or the air cooler; at the same time, according to the load demand and electricity price policy, the load of the air conditioner and the phase change cold storage cabinet 2 can be most reasonably allocated to maximize operating cost savings.

[0051] Example 4 A mobile electric cold storage phase change cold storage transformer cooling system includes: a phase change cold storage cabinet 2, a refrigeration device 3 connected to the phase change cold storage cabinet 2, and a controller 4 connected to the refrigeration device 3; a heat exchange medium 02 is stored in the phase change cold storage cabinet 2; the phase change cold storage cabinet 2 and the refrigeration device 3 are both connected to a temperature sensor 1; the phase change cold storage cabinet 2 is connected to an air conditioner, a fan 5, an atomizer 6 and a water storage tank 10; the water storage tank 10 is arranged inside the refrigeration device 3, and the refrigeration device 3 is connected to the phase change cold storage cabinet 2 through the water storage tank 10 to form a cycle; the controller 4 is electrically connected to the temperature sensor 1, the fan 5 and the atomizer 6 respectively, and is used to obtain the temperature data collected by the temperature sensor 1, and control the start and stop of the refrigeration device 3, the fan 5 and the atomizer 6 according to the preset temperature range to realize step cooling. The system uses the phase change cold storage technology and the heat absorption and heat release characteristics of the heat exchange medium 02 in the phase change process to achieve efficient cooling of the transformer. The phase-change cold storage cabinet 2 can store a large amount of cold and release it quickly when needed, which effectively reduces the temperature of the transformer and improves its operating efficiency and stability. The controller 4 intelligently controls the start and stop of the refrigeration device 3, the fan 5 and the atomizer 6 according to the temperature data collected by the temperature sensor 1, thereby realizing step-by-step cooling. The intelligent control method not only improves the response speed of the cooling system, but also avoids the waste of energy and reduces the operating cost. The circulating cooling method is adopted, and the refrigeration device 3 is connected with the phase-change cold storage cabinet 2 through the water storage tank 10 to form a cycle, which reduces the waste of water resources. At the same time, the use of the atomizer 6 also further improves the cooling efficiency, reduces energy consumption, and meets the requirements of energy conservation and environmental protection. It integrates a variety of cooling methods such as air conditioning, fan 5, atomizer 6, etc., which can be flexibly selected or used in combination according to actual needs, thereby improving the adaptability and flexibility of the system. The system structure is clear, and the connection between the components is simple, which is convenient for daily maintenance and overhaul. At the same time, the intelligent control system also reduces the dependence on manual operation and improves the convenience of maintenance.

[0052] Example 5 A mobile electric cold storage phase change cold storage transformer cooling system, comprising: a phase change cold storage cabinet 2, a refrigeration device 3 connected to the phase change cold storage cabinet 2, and a controller 4 connected to the refrigeration device 3; a heat exchange medium 02 is stored in the phase change cold storage cabinet 2; the phase change cold storage cabinet 2 and the refrigeration device 3 are both connected to a temperature sensor 1; the phase change cold storage cabinet 2 is connected to an air conditioner, a fan 5, an atomizer 6 and a water storage tank 10; the water storage tank 10 is arranged inside the refrigeration device 3, and the refrigeration device 3 is connected to the phase change cold storage cabinet 2 through the water storage tank 10 to form a cycle; the controller 4 is electrically connected to the temperature sensor 1, the fan 5 and the atomizer 6 respectively, for obtaining the temperature data collected by the temperature sensor 1, and controlling the start and stop of the refrigeration device 3, the fan 5 and the atomizer 6 according to the preset temperature range, so as to realize the step cooling. It also includes a water supply tank 7 connected to the phase change cold storage cabinet 2. The phase change cold storage cabinet 2 is connected to the water supply tank 7 through a pipeline, and a valve 8 and a circulating water pump 9 are arranged on the pipeline. The output port of the water storage tank 10 is connected to the input port of the atomizer 6, and is used to provide cooling water for the atomizer 6. The phase change cold storage cabinet 2 is connected to the air conditioner to form a cycle, and the air supply pipe of the air conditioner is connected to the air intake pipe of the phase change cold storage cabinet 2. The phase change cold storage cabinet 2 and the refrigeration device 3 are connected through a pipeline, and a valve 8 and a circulating water pump 9 are provided on the pipeline. A U-shaped coil is provided in the phase change cold storage cabinet 2, and a composite phase change material 01 for cold storage is provided in the U-shaped coil; both ends of the U-shaped coil are connected to the air conditioner, and cold air enters from one end, and heat is output from the other end. The phase change cold storage cabinet 2 and the refrigeration device 3 are both arranged on the vehicle body. The system combines phase change cold storage technology and cascade cooling strategy. The controller 4 intelligently controls the start and stop of the refrigeration device 3, the fan 5 and the atomizer 6 according to the temperature data collected by the temperature sensor 1, thereby realizing precise cooling of the transformer. The composite phase change material 01 in the phase change cold storage cabinet 2 can absorb and store a large amount of cold, and release it quickly when needed, thereby improving the cooling efficiency. The water storage tank 10 is arranged inside the refrigeration device 3, and forms a circulating cooling system with the phase change cold storage cabinet 2, thereby reducing the waste of water resources. At the same time, the water supply tank 7 is connected to the phase change cold storage cabinet 2 through a pipeline to ensure sufficient cooling water for the system, thereby improving the stability and reliability of the system. A variety of cooling methods such as air conditioning, fan 5, and atomizer 6 are integrated, which can be flexibly selected or used in combination according to the actual temperature of the transformer. In addition, the pipeline connection between the phase change cold storage cabinet 2 and the water supply tank 7 and the water storage tank 10, as well as the setting of the valve 8 and the circulating water pump 9, make the system more flexible and convenient to adapt to different cooling needs. The controller 4 is electrically connected to each component to realize intelligent control of the system. Through the preset temperature range, the controller 4 can automatically adjust the working state of the refrigeration device 3, the fan 5 and the atomizer 6, thereby improving the automation and operation efficiency of the system. The phase change cold storage cabinet 2 and the refrigeration device 3 are both arranged on the vehicle body, so that the entire system has mobility, which is convenient for deployment and cooling operations at different locations. This is particularly suitable for occasions that require frequent movement or temporary cooling.

[0053] In summary, the embodiment of the present invention discloses a mobile electric cold storage phase change cold storage transformer cooling system, which uses the phase change cold storage cabinet 2 to store cold by utilizing the latent heat characteristics of the phase change material, thereby shifting the power load during peak periods, realizing the time-space conversion of energy, and assisting the power grid in peak load reduction and valley filling, and promoting the consumption of new energy; at the same time, a cascade cooling method is adopted, which has more significant economic and cooling effects, and solves the technical problems of low heat dissipation efficiency and poor flexibility of the plate radiator or air cooler for the transformer when operating under high ambient temperature and high load conditions.

[0054] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A mobile electric cold storage phase change cold storage transformer cooling system, characterized in that: include: A phase-change cold storage cabinet (2), a refrigeration device (3) connected to the phase-change cold storage cabinet (2), and a controller (4) connected to the refrigeration device (3); a heat exchange medium (02) is stored in the phase-change cold storage cabinet (2); The phase-change cold storage cabinet (2) and the refrigeration device (3) are both connected to a temperature sensor (1); The phase-change cold storage cabinet (2) is connected to an air conditioner, a fan (5), an atomizer (6) and a water storage tank (10); the water storage tank (10) is arranged inside the refrigeration device (3), and the refrigeration device (3) is connected to the phase-change cold storage cabinet (2) through the water storage tank (10) to form a circulation; The controller (4) is electrically connected to the temperature sensor (1), the fan (5) and the atomizer (6) respectively, and is used to obtain temperature data collected by the temperature sensor (1), and to control the start and stop of the refrigeration device (3), the fan (5) and the atomizer (6) according to a preset temperature range, thereby realizing stepped cooling.

2. The mobile electric cold storage phase change cold storage transformer cooling system according to claim 1 is characterized in that: The output port of the water storage tank (10) is connected to the input port of the atomizer (6) and is used to provide cooling water for the atomizer (6).

3. The mobile electric cold storage phase change cold storage transformer cooling system according to claim 1 is characterized in that: The phase-change cold storage cabinet (2) is connected to an air conditioner to form a circulation, and the air supply pipe of the air conditioner is connected to the air intake pipe of the phase-change cold storage cabinet (2).

4. The mobile electric cold storage phase change cold storage transformer cooling system according to claim 1 is characterized in that: The phase-change cold storage cabinet (2) and the refrigeration device (3) are connected via a pipeline, and a valve (8) and a circulating water pump (9) are provided on the pipeline.

5. The mobile electric cold storage phase change cold storage transformer cooling system according to claim 1 is characterized in that: It also includes a water replenishment tank (7) connected to the phase change cold storage cabinet (2).

6. The mobile electric cold storage phase change cold storage transformer cooling system according to claim 5 is characterized in that: The phase-change cold storage cabinet (2) is connected to the water supply tank (7) via a pipeline, and a valve (8) and a circulating water pump (9) are provided on the pipeline.

7. The mobile electric cold storage phase change cold storage transformer cooling system according to claim 1 is characterized in that: The phase change cold storage cabinet (2) is provided with a U-shaped coil, and the U-shaped coil contains a composite phase change material (01) for storing cold. Both ends of the U-shaped coil are connected to the air conditioner, cold air enters from one end, and heat is output from the other end.

8. The mobile electric cold storage phase change cold storage transformer cooling system according to claim 1 is characterized in that: The phase-change cold storage cabinet (2) and the refrigeration device (3) are both arranged on the vehicle body.

9. The operating method of the mobile electric cold storage phase change cold storage transformer cooling system according to any one of claims 1 to 8, characterized in that: The following steps are involved: 1) Cold storage mode After the system is started, the phase-change cold storage cabinet (2) is connected to the air conditioner, and a cold air circulation is formed through the air supply pipe and the air intake pipe of the air conditioner; the cold air enters the phase-change cold storage cabinet (2) to perform a cold storage process; 2) Phase change cold storage cabinet cooling preparation When cooling is required, ensure that the phase-change cold storage cabinet (2) is connected to the water storage tank (10) and the atomizer (6) via a connecting pipe; at the same time, the phase-change cold storage cabinet (2) is connected to the refrigeration device (3) via a connecting pipe to provide a cooling water source for the gradient cooling mode; 3) Temperature monitoring and cascade cooling judgment The controller (4) continuously obtains the wall temperature of the transformer plate heat sink or air cooler collected by the temperature sensor (1); based on a preset temperature range, the controller (4) determines the cooling device and mode to be started; 4) Stepped cooling mode When the temperature is within a first preset temperature range, the controller (4) starts the refrigeration device (3) and the fan (5) for preliminary cooling; if the temperature continues to rise and enters a second preset temperature range, the controller (4) simultaneously starts the atomizer (6) to further reduce the ambient air temperature by utilizing water vapor evaporation; 5) Gradient cooling mode In the gradient cooling mode, the controller (4) automatically adjusts the operating state of the cooling device according to the temperature change; when the temperature is in a first preset temperature range, the controller (4) causes cooling water to flow from the phase change cold storage cabinet (2) into the water storage tank (10), and starts the refrigeration device (3) and the fan (5); when the temperature enters a second preset temperature range, the controller (4) starts the atomizer (6); when the temperature drops below the second preset temperature range but above the first preset temperature range, the controller (4) turns off the atomizer (6) and keeps the fan (5) running; when the temperature drops to a third preset temperature range, the controller (4) turns off the refrigeration device (3) and the fan (5), completing the cooling process; 6) System monitoring and maintenance During the entire operation process, the controller (4) continuously monitors the system status to ensure that all components are operating normally; The phase change cold storage cabinet (2), the refrigeration device (3), the fan (5), the atomizer (6) and the water storage tank (10) are regularly inspected to ensure long-term stable operation of the system.

10. The operating method of the mobile electric cold storage phase change cold storage transformer cooling system according to claim 9 is characterized in that: The phase change cold storage cabinet (2) is provided with a U-shaped coil, and the U-shaped coil contains a composite phase change material (01) for storing cold. After cold air enters the U-shaped coil in the phase change cold storage cabinet, the composite phase change material (01) begins to absorb and store the cold air.

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