New energy primary frequency modulation control device for photovoltaic power station

Abstract

The utility model relates to a new energy primary frequency modulation control device for a photovoltaic power station, which comprises a control cabinet, two U-shaped frames are fixed inside the control cabinet, a heat dissipation block is fixed on the U-shaped frames, one side of the heat dissipation block is in butt joint with an inverter, and the other side of the heat dissipation block is provided with a row of sheets which are in contact with a heat exchange aluminum plate. By designing the heat dissipation block, the heat exchange aluminum plate, the heat exchange aluminum pipe, the water pump and the cold water tank, when air cooling cannot meet the heat dissipation requirement, the water pump can be started to pump out cold water in the cold water tank, and then the cold water returns to the cold water tank through circulation of the heat exchange aluminum pipe; and heat absorbed by the heat exchange aluminum plate can be well taken away, so that water cooling is not limited by the environment, and the heat exchange aluminum plate is matched with an air cooling mechanism for use when the external temperature is relatively high, so that cooling can be more effectively carried out, the power consumption of hardware is reduced, and the defect that air cooling is singly relied on in the prior art is overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic power station frequency modulation equipment design, in particular to a new energy primary frequency modulation control device for a photovoltaic power station. Background Art

[0002] A photovoltaic power station is a facility that uses renewable energy to generate electricity. Its core is to use the photovoltaic effect to convert solar energy into electrical energy. Photovoltaic power stations have many advantages, such as being renewable, pollution-free, highly reliable, highly flexible, economical, and putting less pressure on the power grid. The primary frequency regulation control of photovoltaic power stations using renewable energy mainly involves frequency regulation technology in the power system. When the voltage or frequency of the power grid fluctuates, the control system of the photovoltaic power station will automatically adjust its output to maintain the stability of the power grid. It mainly consists of two methods: voltage-based response control and frequency-based response control.

[0003] At present, voltage-based response control is mainly implemented by the voltage and current control part of the photovoltaic inverter. When the grid voltage fluctuates, the inverter will monitor the grid voltage changes in real time, and control the active and reactive outputs of the photovoltaic power station by changing the output voltage, thereby maintaining the stability of the grid voltage. The existing photovoltaic inverter consists of a cabinet and an inverter body, and the cabinet provides external protection for the inverter body. However, due to the large power of the inverter, it generates more heat when working and is often used outdoors. Therefore, most equipment will be installed with a heat dissipation mechanism, among which air cooling is the main heat dissipation. For example, a photovoltaic power generation inverter cabinet disclosed in patent announcement number CN215222132U drives the fan blades to rotate through the output end of the rotating motor to generate wind energy and dissipate heat from the inner cavity of the cabinet body.

[0004] However, this heat dissipation method is only used when the ambient temperature is not high. If the ambient temperature is too high, such as outdoors in summer, the temperature of the wind blowing in will be high, and it will not be able to cool down quickly. At the same time, in a high temperature environment, the wind machine needs higher power consumption to ensure normal operation, which cannot meet the needs of rapid heat dissipation, and then cannot stably ensure the normal operation of the inverter. Therefore, in response to the above problems, it is necessary for the applicant to design a new energy primary frequency modulation control device for photovoltaic power stations to solve the problem. Utility Model Content

[0005] The purpose of the utility model is to provide a new energy primary frequency modulation control device for a photovoltaic power station, which solves the problems mentioned in the above background technology.

[0006] In order to solve the above technical problems, the utility model provides a new energy primary frequency modulation control device for a photovoltaic power station, including a control cabinet, two U-shaped frames are fixed inside the control cabinet, a heat sink is fixed on the U-shaped frame, one side of the heat sink is connected to the inverter, and the other side of the heat sink is provided with a row of thin sheets and in contact with a heat exchange aluminum plate, the heat exchange aluminum plate is fixed to the inner wall of the control cabinet and is located between the U-shaped frames, the heat exchange aluminum plate is passed through by a heat exchange aluminum tube, both ends of the heat exchange aluminum tube pass through the control cabinet and are connected to a water pump and a cold water tank, the water pump is installed on the top of the cold water tank and are connected to each other through a conduit, the cold water tank is located on one side of the control cabinet, an air inlet is provided at the bottom of the control cabinet, and the control cabinet is connected to the cold water tank at the air inlet with an air cooling mechanism.

[0007] Preferably, both sides of the thin sheet on the heat dissipation block are designed with inclined surfaces, the part of the heat exchange aluminum tube passing through the heat exchange aluminum plate is designed in an "S" shape, and the cold water tank is made of heat-insulating material.

[0008] Preferably, the heat exchange aluminum plate is spliced ​​by plate one and plate two, and each of plate one and plate two is provided with an arc groove for generally clamping the heat exchange aluminum tube. Plate one and plate two are nailed together, and plate two is fixed to the inner wall of the control cabinet, and plate one is in contact with the thin sheet of the heat sink.

[0009] Preferably, a row of thermally conductive silicone strips is bonded to the outer wall of the plate 1, and the thermally conductive silicone strips are in close contact with one end of the thin sheet.

[0010] Preferably, the air cooling mechanism includes a fan, an air guide square tube and a filter frame. The fan is fixed between the cold water tank and the control cabinet, and blows air into the control cabinet through the air inlet. The fan is connected to the air guide square tube installed on the inner wall of the cold water tank. The other end of the air guide square tube passes through the cold water tank and is connected to the filter frame. The air guide square tube is below the water surface inside the cold water tank.

[0011] Preferably, a corresponding air outlet is provided on the top of the control cabinet, a filter screen is fixed on the inner wall of the air outlet, a dust cover is installed on the top of the control cabinet, a louver is installed on the front of the dust cover and covers the air outlet inside.

[0012] Preferably, the control cabinet and the top of the cold water tank are jointly fixed with a sunshade baffle via a vertical rod, and the sunshade baffle is made of heat-insulating material.

[0013] The beneficial effects of the utility model are:

[0014] 1. The utility model uses an air cooling mechanism. When the outside temperature is moderate and not high and heat dissipation is required, the fan can be started to introduce airflow through the air guide square tube, which is introduced through the air inlet and then discharged from the air outlet and the louver. At the same time, the air guide square tube is immersed in cold water, so that the temperature of the airflow passing through the square tube is reduced, thereby effectively improving the efficiency of air cooling, making the temperature range applicable to air cooling larger, and it can be flexibly used in combination with water cooling to better meet the heat dissipation needs.

[0015] 2. The utility model designs a heat sink, a heat exchange aluminum plate, a heat exchange aluminum tube, a water pump and a cold water tank. When air cooling cannot meet the heat dissipation demand, the water pump can be started to pump out cold water from the cold water tank and then return it to the cold water tank through the circulation of the heat exchange aluminum tube. In this process, since the outer wall of the heat exchange aluminum tube fits the inner wall of the heat exchange aluminum plate, the heat absorbed by the heat exchange aluminum plate can be well taken away. In this way, water cooling is not restricted by the environment. When the external temperature is high, it can be used in combination with an air cooling mechanism to cool down more effectively, thereby reducing the power consumption of the hardware and solving the shortcomings of the prior art that relies solely on air cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is the overall three-dimensional structure of the preferred embodiment of the utility model. Figure 1 ;

[0018] Figure 2 It is the overall three-dimensional structure of the preferred embodiment of the utility model. Figure 2 And no inverter is installed;

[0019] Figure 3 It is the overall three-dimensional structure of the preferred embodiment of the utility model. Figure 3 And the dust cover is not installed;

[0020] Figure 4 It is a three-dimensional diagram of the internal structure of the control cabinet of the preferred embodiment of the utility model;

[0021] Figure 5 The heat exchange aluminum plate and the cold water tank are connected in a three-dimensional manner in the preferred embodiment of the utility model. Figure 1 ;

[0022] Figure 6 The heat exchange aluminum plate and the cold water tank are connected in a three-dimensional manner in the preferred embodiment of the utility model. Figure 2 ;

[0023] Figure 7 It is a three-dimensional diagram of the air cooling mechanism of the preferred embodiment of the utility model;

[0024] Figure 8 This is a disassembled stereoscopic diagram of a heat exchange aluminum plate of a preferred embodiment of the utility model;

[0025] Fig. 9 This is a stereogram of the inverter installation of the preferred embodiment of the utility model;

[0026] Fig.10 It is a three-dimensional diagram of a heat dissipation block according to a preferred embodiment of the utility model.

[0027] In the figure: 1. control cabinet; 2. cold water tank; 3. U-shaped frame; 4. heat sink; 401. inclined plane; 5. inverter; 6. heat exchange aluminum plate; 601. plate one; 602. plate two; 7. heat exchange aluminum tube; 8. water pump; 9. air inlet; 10. air guide square tube; 11. air outlet; 12. filter frame; 13. filter screen; 14. dust cover; 15. vertical rod; 16. sunshade baffle; 17. thermal conductive silicone strip; 18. fan. DETAILED DESCRIPTION

[0028] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0029] Embodiment 1, as Figure 1-Figure 10 As shown, the utility model is a new energy primary frequency modulation control device for a photovoltaic power station, comprising: a control cabinet 1, two U-shaped frames 3 are fixed inside the control cabinet 1, a heat sink 4 is fixed on the U-shaped frame 3, one side of the heat sink 4 is connected to the inverter 5, and the other side of the heat sink 4 is provided with a row of thin sheets and in contact with a heat exchange aluminum plate 6, the heat exchange aluminum plate 6 is fixed to the inner wall of the control cabinet 1 and is located between the U-shaped frames 3, the heat exchange aluminum plate 6 is passed through by the heat exchange aluminum tube 7, both ends of the heat exchange aluminum tube 7 pass through the control cabinet 1 and are connected to the water pump 8 and the cold water tank 2, the water pump 8 is installed on the top of the cold water tank 2 and are connected to each other through a conduit, the cold water tank 2 is located on one side of the control cabinet 1, an air inlet 9 is provided at the bottom of the control cabinet 1, and the control cabinet 1 is connected to the cold water tank 2 at the air inlet 9 with an air cooling mechanism.

[0030] The specific operation is as follows. Through the above structural design, after the inverter 5 is installed on the U-shaped frame 3, the heat sink 4 can absorb heat when the inverter 5 is working, and dissipate heat through a row of thin sheets. At the same time, the heat exchange aluminum plate 6 contacts the thin sheets to quickly absorb heat, and absorbs the heat emitted to the air by the inverter 5 and the heat sink 4, completing the initial heat dissipation. When the outside temperature is not high, air cooling can be used to meet the heat dissipation requirements. When the temperature is too high and air cooling cannot meet the requirements, the water pump 8 can be started to pump out the cold water from the cold water tank 2 and then return it to the cold water tank 2 through the circulation of the heat exchange aluminum tube 7. In this process, due to the outer wall of the heat exchange aluminum tube 7 and the heat exchange aluminum The inner wall of the plate 6 fits well, which can take away the heat absorbed by the heat exchange aluminum plate 6. In this way, water cooling is not restricted by the environment. When the external temperature is high, it can be used in combination with an air cooling mechanism to cool down more effectively, thereby reducing the power consumption of the hardware and solving the shortcomings of the existing technology that relies solely on air cooling. It should be noted that the material of the heat sink 4 can be flexibly used according to actual needs when selecting, and copper and aluminum can be used without limitation. At the same time, the cold water tank 2 can be installed with relevant refrigeration plates to keep the water temperature within the required range during water cooling, and can be used in conjunction with a water thermometer. This is a prior art means and will not be elaborated here.

[0031] Both sides of the thin sheet on the heat dissipation block 4 are designed with inclined surfaces 401, the heat exchange aluminum tube 7 passes through the heat exchange aluminum plate 6 with an "S" shape design, the cold water tank 2 is made of heat insulating material, the heat exchange aluminum plate 6 is spliced ​​by plate 1 601 and plate 2 602, and plate 1 601 and plate 2 602 are each provided with an arc groove for generally clamping the heat exchange aluminum tube 7, plate 1 601 and plate 2 602 are nailed, and plate 2 602 is fixed to the inner wall of the control cabinet 1, and plate 1 601 is in contact with the thin sheet of the heat dissipation block 4, and a row of thermal conductive silicone strips 17 are bonded to the outer wall of plate 1 601, and the thermal conductive silicone strip 17 is in close contact with one end of the thin sheet.

[0032] Furthermore, in the optimized design of the water cooling structure, the thin sheets on the heat dissipation block 4 are inclined on both sides to increase the surface area, which is convenient for better heat dissipation, and the "S"-shaped design of the heat exchange aluminum tube 7 increases the contact area with the inside of the heat exchange aluminum plate 6, further improving the heat exchange efficiency. The cold water tank 2 is made of heat-insulating material, which can maintain the low temperature of the water to a certain extent. At the same time, the heat exchange aluminum plate 6 is spliced ​​by plate one 601 and plate two 602, which is convenient for disassembly and maintenance of the heat exchange aluminum tube 7. Finally, the thermal conductive silicone strip 17 makes the contact between plate one 601 and the thin sheet closer, so that the heat can be more stably conducted to the heat exchange aluminum plate 6.

[0033] Embodiment 2, as Figure 1-4 as well as Figure 7As shown, different from the first embodiment, the air cooling mechanism includes a fan 18, an air guide square tube 10 and a filter frame 12. Two fans 18 are fixed between the cold water tank 2 and the control cabinet 1, and blow air into the control cabinet 1 through the air inlet 9. The fan 18 is connected to the air guide square tube 10 installed on the inner wall of the cold water tank 2. The other end of the air guide square tube 10 passes through the cold water tank 2 and is connected to the filter frame 12. The air guide square tube 10 is below the water surface inside the cold water tank 2;

[0034] A corresponding air outlet 11 is provided on the top of the control cabinet 1, a filter screen 13 is fixed on the inner wall of the air outlet 11, a dust cover 14 is installed on the top of the control cabinet 1, a louver is installed on the front of the dust cover 14 and covers the air outlet 11 inside, and a sunshade baffle 16 is fixed to the top of the control cabinet 1 and the cold water tank 2 through a vertical rod 15, and the sunshade baffle 16 is made of insulation material.

[0035] The specific operation is as follows. Through the design of the air cooling mechanism, in the existing air cooling optimization design, the heat of the heat sink 4 and the inverter 5 will also be dissipated into the air. When the outside temperature is not high, the fan 18 can be started to introduce airflow through the air guide square tube 10, which is introduced through the air inlet 9 and then discharged from the air outlet 11 and the louver plate to complete convection heat exchange and reduce the internal temperature. At the same time, the air guide square tube 10 is immersed in cold water, so that the temperature of the air flow passing through the square tube 10 is reduced, thereby effectively improving the efficiency of air cooling, adapting to a wider temperature range, and can be flexibly used in combination with water cooling to better meet the heat dissipation needs. For example, when the outside temperature is low, start a fan, when the outside temperature is moderate, start two fans, when the outside temperature is high, start water cooling and air cooling together, and so on. The filter frame 12, the dust cover 14 and the filter screen 13 all have a dustproof effect to prevent daily air cooling or natural ventilation dust from entering the interior, and the sunshade baffle 16 can provide sunshade and dustproof, which is very practical.

[0036] Working principle: First, after the inverter 5 is installed on the U-shaped frame 3, the heat sink 4 can absorb heat when the inverter 5 is working, and dissipate heat through a row of thin sheets. At the same time, the heat exchange aluminum plate 6 contacts the thin sheets to quickly absorb heat, and absorbs the heat emitted to the air by the inverter 5 and the heat sink 4, completing the initial heat dissipation. In winter, the heat dissipation demand can be met. When the outside temperature is moderate and heat dissipation is required, the fan 18 can be started to introduce airflow through the air guide square tube 10, which is introduced through the air inlet 9 and then discharged from the air outlet 11 and the louver plate. At the same time, the air guide square tube 10 is immersed in In the cold water, the temperature of the air flow passing through the square tube 10 is reduced, so that air cooling can be used when the ambient temperature is slightly high, thereby effectively improving the efficiency of air cooling. When the outside temperature is very high in summer, the water pump 8 can be started to extract cold water from the cold water tank 2 and then return it to the cold water tank 2 through the circulation of the heat exchange aluminum tube 7. In this process, since the outer wall of the heat exchange aluminum tube 7 fits the inner wall of the heat exchange aluminum plate 6, the heat absorbed by the heat exchange aluminum plate 6 can be well taken away, playing a dual heat dissipation role. The utility model has a simple and practical structure and is worthy of popularization and use.

[0037] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A new energy primary frequency modulation control device for a photovoltaic power station, characterized in that: include: A control cabinet (1), wherein two U-shaped frames (3) are fixed inside the control cabinet (1), a heat sink (4) is fixed on the U-shaped frame (3), one side of the heat sink (4) is connected to the inverter (5), and the other side of the heat sink (4) is provided with a row of thin sheets and contacts with a heat exchange aluminum plate (6), the heat exchange aluminum plate (6) is fixed to the inner wall of the control cabinet (1) and is located between the U-shaped frames (3), the heat exchange aluminum plate (6) is passed through by a heat exchange aluminum tube (7), both ends of the heat exchange aluminum tube (7) pass through the control cabinet (1) and are connected to a water pump (8) and a cold water tank (2), the water pump (8) is installed on the top of the cold water tank (2) and are connected to each other through a conduit, and the cold water tank (2) is located on one side of the control cabinet (1); The control cabinet (1) is provided with an air inlet (9) at the bottom, and the control cabinet (1) is connected to the cold water tank (2) at the air inlet (9) with an air cooling mechanism.

2. A new energy primary frequency modulation control device for a photovoltaic power station as claimed in claim 1, characterized in that: Both sides of the thin sheet on the heat dissipation block (4) are designed with inclined surfaces (401), the part of the heat exchange aluminum tube (7) passing through the heat exchange aluminum plate (6) is designed in an "S" shape, and the cold water tank (2) is made of heat insulating material.

3. A new energy primary frequency modulation control device for a photovoltaic power station as claimed in claim 1, characterized in that: The heat exchange aluminum plate (6) is formed by splicing a plate one (601) and a plate two (602), each of which is provided with an arc groove for generally clamping the heat exchange aluminum tube (7), the plate one (601) and the plate two (602) are nailed together, and the plate two (602) is fixed to the inner wall of the control cabinet (1), and the plate one (601) is in contact with the thin sheet of the heat dissipation block (4).

4. A new energy primary frequency modulation control device for a photovoltaic power station as claimed in claim 3, characterized in that: A row of heat-conducting silicone strips (17) is bonded to the outer wall of the plate 1 (601), and the heat-conducting silicone strips (17) are in close contact with one end of the thin sheet.

5. A new energy primary frequency modulation control device for a photovoltaic power station as claimed in claim 1, characterized in that: The air cooling mechanism comprises a fan (18), an air guiding square tube (10) and a filter frame (12); the two fans (18) are fixed between the cold water tank (2) and the control cabinet (1), and blow air into the control cabinet (1) through the air inlet (9); the fans (18) are connected to the air guiding square tube (10) installed on the inner wall of the cold water tank (2); the other end of the air guiding square tube (10) passes through the cold water tank (2) and is connected to the filter frame (12); the air guiding square tube (10) is below the water surface inside the cold water tank (2).

6. A new energy primary frequency modulation control device for a photovoltaic power station as claimed in claim 5, characterized in that: The top of the control cabinet (1) is provided with a corresponding air outlet (11), the inner wall of the air outlet (11) is fixed with a filter screen (13), the top of the control cabinet (1) is installed with a dust cover (14), the front of the dust cover (14) is installed with a louver plate and covers the air outlet (11) inside.

7. A new energy primary frequency modulation control device for a photovoltaic power station as claimed in claim 1, characterized in that: A sunshade baffle (16) is fixed to the top of the control cabinet (1) and the cold water tank (2) via a vertical rod (15), and the sunshade baffle (16) is made of a heat-insulating material.

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