A photovoltaic box-type transformer rainproof and heat dissipation system and a rainproof and heat dissipation control method

Abstract

This invention discloses a rainproof and heat dissipation system and control method for photovoltaic transformer substations, relating to the field of photovoltaic power station technology. The rainproof and heat dissipation system includes a transformer substation housing, a first air inlet, a first exhaust outlet, a first exhaust power component, a second air inlet, a second exhaust outlet, a second exhaust power component 51, an internal circulation power component, an opening adjustment device, and a control device. The first air inlet is located at the lower part of the housing housing; the first exhaust outlet is located at the top of the housing housing; the second air inlet is located at the upper part of the housing housing; the second exhaust outlet is located on the side wall of the housing housing opposite to the second air inlet; and the internal circulation power component is located inside the housing housing. During rainfall, the rainproof and heat dissipation system provided in this application can achieve rainproof function by reducing or closing the first air inlet and / or the second air inlet, while simultaneously achieving internal circulation heat dissipation through the internal circulation power component. This effectively solves the problem of the conflict between rainproofing and heat dissipation.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic power plant technology, and more specifically, to a rainproof and heat dissipation system for photovoltaic transformer substations. Furthermore, this invention also relates to a rainproof and heat dissipation control method applied to the aforementioned rainproof and heat dissipation system for photovoltaic transformer substations. Background Technology

[0002] Photovoltaic transformer substations are the core power conversion and distribution equipment of photovoltaic power plants. Operating in complex outdoor environments for extended periods, rain protection and heat dissipation are crucial for their stable operation. Existing photovoltaic transformer substations generally employ a single negative pressure duct with on / off control. When the duct needs to be opened to ensure heat dissipation, rainwater can easily backflow during rainy weather, causing electrical components to become damp and damaged. Conversely, when the duct needs to be closed for rain protection, heat can accumulate inside the substation, leading to localized overheating.

[0003] In conclusion, how to provide a rainproof and heat dissipation system that can resolve the conflict between rain protection and heat dissipation is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a rainproof and heat dissipation system for photovoltaic transformer substations, which can solve the problem of the conflict between rainproofing and heat dissipation.

[0005] Another objective of this invention is to provide a rainproof and heat dissipation control method including the above-mentioned photovoltaic transformer substation rainproof and heat dissipation system.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A photovoltaic transformer substation rainproof and heat dissipation system includes:

[0008] The enclosure has internal chambers for storing functional components;

[0009] The first air inlet is located at the lower part of at least one side wall of the housing;

[0010] The first exhaust vent is located at the top of the housing. The first exhaust vent is equipped with a first exhaust power component. When the first exhaust power component is in working condition, the gas inside the housing can be extracted through the first exhaust vent.

[0011] The second air inlet is located at the upper part of at least one side wall of the housing; gas can enter the housing through the first air inlet and the second air inlet.

[0012] The second exhaust port is located on the side wall of the housing opposite to the second air inlet port. The second exhaust port is equipped with a second exhaust power component. When the second exhaust power component is in working condition, the gas inside the housing can be extracted through the second exhaust port.

[0013] An internal circulation power component is installed inside the box, and the internal circulation power component is used to accelerate the gas flow inside the box;

[0014] An opening adjustment device is provided at the first air inlet and the second air inlet;

[0015] The control device is connected to the first exhaust power component, the second exhaust power component, the internal circulation power component, and the opening adjustment device to control the operation of the first exhaust power component, the second exhaust power component, the internal circulation power component, and the opening adjustment device.

[0016] Optionally, the first air inlet and the second air inlet are respectively located on different side walls of the housing;

[0017] And / or, both the first air inlet and the second air inlet are equipped with dustproof and rainproof nets.

[0018] Optionally, the housing is provided with at least two chambers, and each chamber is provided with a corresponding first air inlet and a corresponding second air inlet.

[0019] Optionally, adjacent chambers are separated by a spacer sidewall, and the internal circulation power component is disposed on the spacer sidewall;

[0020] And / or, the internal circulation power component is a circulating fan.

[0021] Optionally, the opening adjustment device includes:

[0022] A rotating component includes a rotating shaft and fan blades driven to rotate by the rotating shaft. The fan blades are disposed at the first air inlet and the second air inlet, and the central axis of the rotating shaft is disposed along the width direction of the first air inlet or the second air inlet.

[0023] A rotating power component is connected to the rotating shaft and drives the rotating shaft to rotate, so as to adjust the fan blades to any angle position between the fully open angle, the fully closed angle, and the fully open angle and the fully closed angle.

[0024] When the fan blades rotate to the fully closed angle, the first air inlet or the second air inlet is in a closed state.

[0025] Optionally, it also includes a raindrop sensor, a first temperature and humidity sensor, a second temperature and humidity sensor, a wind speed sensor, and a fan status monitoring sensor; the raindrop sensor, the wind speed sensor, and the first temperature and humidity sensor are disposed on the outside of the housing, the raindrop sensor is used to detect the amount of rainfall in the external environment of the housing, the first temperature and humidity sensor is used to detect the temperature and humidity in the external environment of the housing, and the wind speed sensor is used to detect the wind speed in the external environment of the housing;

[0026] The second temperature and humidity sensor and the fan status monitoring sensor are installed inside the box. The second temperature and humidity sensor is used to detect the temperature and humidity inside the box, and the fan status monitoring sensor is used to detect the rotation speed of the first exhaust power component, the second exhaust power component and the internal circulation power component.

[0027] The raindrop sensor, the first temperature and humidity sensor, the second temperature and humidity sensor, and the fan status monitoring sensor are all connected to the control device.

[0028] A rainproof and heat dissipation control method is applied to the rainproof and heat dissipation system of the photovoltaic transformer substation described in any of the above claims, the rainproof and heat dissipation control method comprising:

[0029] Obtain the first temperature information detected by the second temperature and humidity sensor;

[0030] Determine whether the first temperature information is lower than the first preset temperature. If yes, execute the low temperature protection strategy; otherwise, proceed to the next step.

[0031] Determine whether the first temperature information is greater than the second preset temperature. If the second preset temperature is higher than the first preset temperature, proceed to the next step; otherwise, maintain the current state.

[0032] Obtain the rainfall information acquired by the raindrop sensor;

[0033] Determine whether the rainfall information indicates a rainless state. If yes, proceed to the next step; otherwise, proceed to the step of determining rainfall.

[0034] The system acquires the second temperature information obtained by the first temperature and humidity sensor and the wind speed information obtained by the wind speed sensor, and determines whether the wind speed information is less than or equal to the first preset wind speed value and greater than or equal to the second preset wind speed value, and whether the difference between the second temperature information and the first temperature information is less than 5°C, and whether the second preset wind speed value is less than the first preset wind speed value. If yes, a natural ventilation strategy is executed; if no, a mechanical assisted heat dissipation strategy is executed.

[0035] If the rainfall information is lower than the first preset rainfall value, the opening adjustment device is controlled to adjust the opening of the first air inlet and / or the second air inlet to 15%-25%; the rotation speed of the first exhaust power component and the second exhaust power component is adjusted to medium speed; if not, the opening adjustment device is controlled to adjust the opening of the first air inlet and the second air inlet to a fully closed state, the first exhaust power component and the second exhaust power component are turned off, and the internal circulation power component is turned on.

[0036] Optionally, it also includes:

[0037] Acquire rainfall information from the raindrop sensor and continue for a first preset time;

[0038] Determine whether the rainfall information remains in a rainless state within the first preset time period; if so, after the second preset time period, control the opening adjustment device to gradually adjust the opening of the first air inlet and the second air inlet from small to large to fully open, and control the rotation speed of the first exhaust power component and the second exhaust power component to gradually increase from low speed to high speed.

[0039] Optionally, the cryogenic protection strategy includes:

[0040] The control opening adjustment device adjusts the opening of the first air inlet and the second air inlet to 15%-25%, and controls the speed of the first exhaust power component and the second exhaust power component to decrease or stop.

[0041] Return to the previous step to obtain the first temperature information detected by the second temperature and humidity sensor;

[0042] The natural ventilation strategy includes:

[0043] The control opening adjustment device gradually adjusts the opening of the first air inlet and / or the second air inlet from small to large to the fully open state, and controls the first exhaust power component and the second exhaust power component to stop.

[0044] The mechanically assisted heat dissipation strategy includes:

[0045] If the first temperature information is higher than the third preset temperature, and the third preset temperature is higher than the second preset temperature, then the opening adjustment device is controlled to open both the first air inlet and the second air inlet, and the first exhaust power component and the second exhaust power component are controlled to rotate; if not, the opening adjustment device is controlled to open the first air inlet, and the first exhaust power component is controlled to rotate.

[0046] A rainproof and heat dissipation control method is applied to the rainproof and heat dissipation system of the photovoltaic transformer box as described above, wherein the photovoltaic transformer box rainproof and heat dissipation system further includes a wind direction sensor, which is used to detect the wind direction of the external environment of the box;

[0047] When the rainfall information acquired by the raindrop sensor indicates a rainy condition, the rainproof heat dissipation control method includes:

[0048] Obtain the wind direction information detected by the wind direction sensor and the wind speed information obtained by the wind speed sensor;

[0049] If the wind speed information is greater than the third preset wind speed value, the opening adjustment device is controlled to adjust the first air inlet and / or the second air inlet on the windward side to a fully closed state, and the opening of the first air inlet and / or the second air inlet on the leeward side is adjusted to 15%-25%; otherwise, the opening adjustment device is controlled to adjust the opening of the first air inlet and / or the second air inlet on the windward side to 15%-25%, and the opening of the first air inlet and / or the second air inlet on the leeward side to a fully open state.

[0050] The photovoltaic transformer substation rainproof and heat dissipation system provided by the present invention includes a box body, a first air inlet, a first air outlet, a first exhaust fan, a first exhaust power component, a second air inlet, a second exhaust fan, a second exhaust power component, an internal circulation power component, an opening adjustment device, and a control device; wherein, the first air inlet is located at the lower part of at least one side wall of the box body; The first exhaust vent is located at the top of the housing and is equipped with a first exhaust power component. When the first exhaust power component is in working condition, gas inside the housing can be extracted through the first exhaust vent. The second air inlet is located at the upper part of at least one side wall of the housing. Gas can enter the housing through the first air inlet and the second air inlet. The second exhaust vent is located on the side wall of the housing opposite to the second air inlet and is equipped with a second exhaust power component. When the second exhaust power component is in working condition, gas inside the housing can be extracted through the second exhaust vent. An internal circulation power component is located inside the housing and is used to accelerate the gas flow inside the housing. An opening adjustment device is located at the first air inlet and the second air inlet. A control device is connected to the first exhaust power component, the second exhaust power component, the internal circulation power component, and the opening adjustment device to control the operation of the first exhaust power component, the second exhaust power component, the internal circulation power component, and the opening adjustment device.

[0051] In actual use, when the temperature inside the chamber is lower than the first preset temperature (which is a pre-set value), a low-temperature protection strategy is implemented. Specifically, this involves reducing the opening of the first and second air inlets and controlling the first and second exhaust fans to rotate at low speed or stop. When the temperature inside the chamber is higher than the first preset temperature but lower than the second preset temperature (where the second preset temperature is higher than the first preset temperature), the current state is maintained. If the temperature inside the chamber is higher than the second preset temperature and natural ventilation conditions are met, the first and / or second air inlets are opened for natural ventilation. When mechanical auxiliary cooling is required, the first air inlet and / or the second air inlet should be opened simultaneously with the first exhaust fan and / or the second exhaust fan to provide auxiliary cooling. If there is rainfall, the opening degree of the first air inlet and / or the second air inlet and the speed of the first exhaust fan and / or the second exhaust fan can be adjusted according to the amount of rainfall. When the rainfall is heavy, the first air inlet and the second air inlet can be closed, and the first exhaust fan and the second exhaust fan can be stopped. The internal circulation fan can be started, and the speed of the internal circulation fan can be adjusted according to the temperature inside the chamber.

[0052] The photovoltaic transformer rainproof and heat dissipation system provided in this application can adapt to different heat dissipation needs by adjusting the opening of the first air inlet and / or the second air inlet and the rotation speed of the first exhaust power component and / or the second exhaust power component. In addition, during rainfall, the rainproof function can be achieved by reducing or closing the opening of the first air inlet and / or the second air inlet. At the same time, internal circulation heat dissipation is achieved through the internal circulation power component, so that rainproofing and heat dissipation needs are met at the same time, which can effectively solve the problem of conflict between rainproofing and heat dissipation. Attached Figure Description

[0053] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0054] Figure 1 This is a first-angle structural schematic diagram of the photovoltaic transformer substation rainproof and heat dissipation system provided by the present invention.

[0055] Figure 2 for Figure 1 A schematic diagram of the second angle of the rainproof and heat dissipation system of the photovoltaic transformer substation.

[0056] Figure 3 for Figure 1 A schematic diagram of the third angle of the rainproof and heat dissipation system of the photovoltaic transformer substation.

[0057] Figure 4 for Figure 1 A schematic diagram of the internal structure of the rainproof and heat dissipation system of the photovoltaic transformer substation.

[0058] Figure 5 This is a schematic diagram of a specific embodiment of the opening adjustment device provided by the present invention.

[0059] Figure 6 This is a schematic diagram showing the fan blades of the opening adjustment device provided by the present invention at different angular positions.

[0060] Figure 7 This is a schematic flowchart of the rainproof and heat dissipation control method provided by the present invention.

[0061] Figure 1-7 middle:

[0062] 1. Housing, 2. First air inlet, 3. First exhaust outlet, 31. First exhaust power component, 4. Second air inlet, 5. Second exhaust outlet, 51. Second exhaust power component, 6. Internal circulation power component, 7. Opening adjustment device, 71. Fan blade. Detailed Implementation

[0063] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0064] The core of this invention is to provide a rainproof and heat dissipation system for photovoltaic transformer substations, which can solve the problem of the conflict between rainproofing and heat dissipation.

[0065] Another core aspect of this invention is to provide a rainproof and heat dissipation control method including the above-mentioned photovoltaic transformer rainproof and heat dissipation system.

[0066] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4As shown in the figure, the photovoltaic transformer substation rainproof and heat dissipation system provided in this specific embodiment includes a housing 1, a first air inlet 2, a first exhaust vent 3, a first exhaust power component 31, a second air inlet 4, a second exhaust vent 5, a second exhaust power component 51, an internal circulation power component 6, an opening adjustment device 7, and a control device; wherein, the first air inlet 2 is located at the lower part of at least one side wall of the housing 1; the first exhaust vent 3 is located at the top of the housing 1, and the first exhaust vent 3 is equipped with a first exhaust power component 31. When the first exhaust power component 31 is in working condition, the gas inside the housing 1 can be extracted through the first exhaust vent 3; the second air inlet 4 is located at the upper part of at least one side wall of the housing 1; the gas can enter the housing 1 through the first air inlet 2 and the second air inlet 4; the second exhaust vent 5 is located on the side wall of the housing 1 opposite to the second air inlet 4, and the second exhaust vent 5 is equipped with a second exhaust power component 51. When in working condition, the gas inside the housing 1 can be extracted through the second exhaust port 5; the internal circulation power component 6 is installed inside the housing 1 and is used to accelerate the gas flow inside the housing 1; the opening adjustment device 7 is installed at the first air inlet 2 and the second air inlet 4; the control device is connected to the first exhaust power component 31, the second exhaust power component 51, the internal circulation power component 6 and the opening adjustment device 7 to control the operation of the first exhaust power component 31, the second exhaust power component 51, the internal circulation power component 6 and the opening adjustment device 7.

[0067] In actual use, when the temperature inside the enclosure 1 is lower than the first preset temperature, a low-temperature protection strategy is implemented. Specifically, the opening of the first air inlet 2 and the second air inlet 4 can be reduced, and the first exhaust fan 31 and the second exhaust fan 51 can be controlled to rotate at low speed or stop. When the temperature inside the enclosure 1 is higher than the first preset temperature but lower than the second preset temperature, and the second preset temperature is higher than the first preset temperature, the current state is maintained. If the temperature inside the enclosure 1 is higher than the second preset temperature and meets the natural ventilation conditions, the first air inlet 2 and / or the second air inlet 4 are opened for natural ventilation. When mechanical auxiliary cooling is required... When the first air inlet 2 and / or the second air inlet 4 are open, the first exhaust power unit 31 and / or the second exhaust power unit 51 are turned on to assist in heat dissipation. If there is rainfall, the opening degree of the first air inlet 2 and / or the second air inlet 4 and the speed of the first exhaust power unit 31 and / or the second exhaust power unit 51 can be adjusted according to the amount of rainfall. When the rainfall is heavy, the first air inlet 2 and the second air inlet 4 can be closed, and the first exhaust power unit 31 and the second exhaust power unit 51 can be stopped. The internal circulation power unit 6 can be turned on to start internal circulation, and the speed of the internal circulation power unit 6 can be adjusted according to the temperature inside the box 1.

[0068] In this specific embodiment, the first preset temperature and the second preset temperature are both preset values. Specifically, the first preset temperature can be 15℃ and the second preset temperature can be 30℃. Of course, the first preset temperature and the second preset temperature can also be other values ​​that meet the requirements, which will be determined according to the actual situation and will not be elaborated here.

[0069] The photovoltaic transformer rainproof and heat dissipation system provided in this specific embodiment can adapt to different heat dissipation needs by adjusting the opening of the first air inlet 2 and / or the second air inlet 4 and the rotation speed of the first exhaust power component 31 and / or the second exhaust power component 51. In addition, during rainfall, the rainproof function can be achieved by reducing or closing the opening of the first air inlet 2 and / or the second air inlet 4. At the same time, internal circulation heat dissipation is achieved through the internal circulation power component 6, so that rainproofing meets heat dissipation needs while meeting rain dissipation needs, which can effectively solve the problem of conflict between rainproofing and heat dissipation.

[0070] On the other hand, in this specific embodiment, the first air inlet 2 is located at the lower part of at least one side wall of the housing 1, and the first exhaust control is located at the top of the housing 1. When the first air inlet 2 and the first exhaust power component 31 are opened, the gas can enter from the lower part of the housing 1, flow through the space inside the housing 1, and then flow out from the first exhaust hole 3 at the top of the housing 1, thereby extending the flow path of the gas in the housing 1 as much as possible and improving the heat dissipation effect. The second air inlet 4 is located at the upper part of the side wall, and the second exhaust hole 5 is arranged opposite to the second air inlet 4. When the second air inlet 4 and the second exhaust power component 51 are opened, the flow rate of the gas in the upper part of the housing 1 can be accelerated.

[0071] Based on the above embodiments, the enclosure 1 can include at least two chambers. Different second preset temperatures can be set for different chambers, and a load monitoring module can be connected to the secondary side of the transformer. For example, the enclosure 1 can include a transformer compartment, a low-pressure compartment, and a high-pressure compartment. Different second preset temperatures can be set according to the heating characteristics and load sensitivity of each compartment. Specifically, the second preset temperature of the transformer compartment can be set to 40℃ in spring, autumn, and winter, and 38℃ in summer; when the load rate is ≥90%, the second preset temperature can be set to 35℃ in spring, autumn, and winter, and 33℃ in summer. The second preset temperature of the low-pressure compartment can be set to 35℃ in spring, autumn, and winter, and 33℃ in summer; when the load rate is ≥90%, the second preset temperature can be set to 30℃ in spring, autumn, and winter, and 28℃ in summer. The second preset temperature for the high-pressure chamber can be set to 32℃ in spring, autumn, and winter, and 30℃ in summer. When the load rate is ≥90%, the second preset temperature can be set to 28℃ in spring, autumn, and winter, and 26℃ in summer. Additionally, when the load rate suddenly increases, the corresponding cooling devices should be activated 5 minutes in advance to prevent sudden high temperatures from damaging the equipment. When the temperature difference between the area near the heat source and other areas is ≥8℃, the circulating fan should be activated to eliminate the temperature gradient, achieve uniform temperature distribution within the chamber, and prevent localized overheating.

[0072] In addition, based on different regions, regional basic parameters can be set according to humid southern regions, dry northern regions, and plateau temperature difference regions, and seasonal basic parameters can be set according to spring, summer, autumn and winter. The opening of the first preset temperature, the second preset temperature, the first air inlet 2 and the second air inlet 4 can be automatically corrected according to the parameters, thereby improving the system's adaptability to different climatic environments.

[0073] Based on the above embodiments, the housing 1 can be provided with at least two chambers, and each chamber is provided with a corresponding first air inlet 2 and a corresponding second air inlet 4.

[0074] In this specific embodiment, each chamber is provided with a corresponding first air inlet 2 and a second air inlet 4. In actual use, the first air inlet 2 and the first exhaust power component 31 are opened first. When opening only the first air inlet 2 and the first exhaust power component 31 cannot meet the heat dissipation requirements of the corresponding chamber, the second air inlet 4 and the second exhaust power component 51 can be further opened.

[0075] This specific embodiment can achieve targeted heat dissipation for different chambers. A corresponding second temperature and humidity sensor is set in each chamber to detect the temperature information in the corresponding chamber. According to the heat dissipation needs of different chambers, the corresponding first air inlet 2 and / or second air inlet 4 can be opened to achieve differentiated heat dissipation control, effectively saving energy while meeting the heat dissipation needs.

[0076] In one specific embodiment, the first air inlet 2 and the second air inlet 4 can be respectively set on different side walls of the housing 1. In actual use, since the wind direction of the external environment of the housing 1 will change, the first air inlet 2 and / or the second air inlet 4 on different side walls can be opened according to the change of wind direction.

[0077] In rainy weather, the first air inlet 2 and the second air inlet 4 on the windward side are prone to rainwater blowing in. You can choose to close the first air inlet 2 and the second air inlet 4 on the windward side and open the first air inlet 2 and the second air inlet 4 on the leeward side. This can effectively prevent rainwater from entering the cabinet 1 and improve the heat dissipation effect of the cabinet 1, further solving the problem of the conflict between rain protection and heat dissipation.

[0078] Based on the above embodiments, dustproof and rainproof nets can be installed on both the first air inlet 2 and the second air inlet 4 to prevent dust, impurities and rainwater from directly entering the housing 1 through the first air inlet 2 and the second air inlet 4.

[0079] In one specific embodiment, such as Figure 4 As shown, adjacent chambers are separated by a partition sidewall, and the internal circulation power component 6 is located on the partition sidewall. Specifically, the internal circulation power component 6 can be a circulating fan. Of course, the internal circulation power component 6 can also be other structures that meet the requirements, depending on the actual situation, which will not be elaborated here.

[0080] In this specific embodiment, when the external weather is rainy, windy, or the temperature inside the housing 1 is lower than the first preset temperature, all the first air inlets 2 and second air inlets 4 can be closed, and the internal circulation power unit 6 can be activated to accelerate the flow of gas inside the housing 1. Through the flow of gas inside the housing 1, heat dissipation or heat preservation of the housing 1 can be achieved. In addition, the internal circulation power unit 6 in this specific embodiment is set on the partition side wall, which can realize ventilation and heat dissipation between adjacent chambers. This is beneficial to heat dissipation of different chambers. Moreover, when the gas circulation in a single chamber does not meet the heat dissipation requirements, the space for gas circulation flow can be increased by utilizing adjacent chambers to improve the heat dissipation effect.

[0081] In one specific embodiment, the opening adjustment device 7 includes a rotating component and a rotating power component. The rotating component includes a rotating shaft and a fan blade 71 driven to rotate by the rotating shaft. The fan blade 71 is disposed at the first air inlet 2 and the second air inlet 4. The central axis of the rotating shaft is arranged along the width direction of the first air inlet 2 or the second air inlet 4. The rotating power component is connected to the rotating shaft and drives the rotating shaft to rotate, so as to adjust the fan blade 71 to rotate to a fully open angle, a fully closed angle, and any angle position between the fully open angle and the fully closed angle. When the fan blade 71 rotates to the fully closed angle, the first air inlet 2 or the second air inlet 4 is in a closed state.

[0082] In this specific embodiment, the width direction of the first air inlet 2 or the second air inlet 4 is... Figure 5 The direction perpendicular to the BB section at the angle shown can be specifically configured as a louver, where the opening adjustment device 7 can be set as a louver.

[0083] In practical use, the rotation angle of the fan blade 71 can be adjusted according to different actual conditions, thereby adjusting the opening degree of the first air inlet 2 and the second air inlet 4, such as... Figure 6 The diagrams shown depict the fan blade 71 at 0°, 20°, 40°, and 60° angles. To prevent rainwater from entering the first air inlet 2 and the second air inlet 4, the portion of the fan blade 71 extending beyond the first air inlet 2 and the second air inlet 4 is generally inclined downwards relative to the horizontal plane. Furthermore, when the fan blade 71 is at the 0° angle position, the first air inlet 2 and the second air inlet 4 are fully closed.

[0084] It should be noted that the fan blade 71 in this specific embodiment can also be set to four adjustment modes: 0°, 20°, 40°, and 60°. Based on rainfall intensity, equipment operating load, and cabin temperature, the corresponding opening and closing angles are matched in stages. In rainless, high-load conditions, the blades gradually increase in opening to enhance ventilation and heat dissipation; in rainy weather, they gradually decrease in opening to a fully closed seal for rain protection. This tiered switching strategy achieves conflict-free coordinated control of rain protection and heat dissipation. Alternatively, it can be set to a stepless adjustment mode between 0° and fully open, depending on the actual situation.

[0085] In this specific embodiment, the rotational power component can be a servo motor or other power components that meet the requirements, which will not be elaborated here.

[0086] In this specific embodiment, the opening degree of the first air inlet 2 and the second air inlet 4 can be adjusted by setting a rotating component. In the process of adjusting the opening degree of the first air inlet 2 and the second air inlet 4, the adjustment process can be automated by rotating the power component, which simplifies the adjustment process and improves the accuracy of the opening degree adjustment.

[0087] In one specific embodiment, the photovoltaic transformer substation rainproof and heat dissipation system further includes a raindrop sensor, a first temperature and humidity sensor, a second temperature and humidity sensor, a wind speed sensor, and a fan status monitoring sensor. The raindrop sensor, wind speed sensor, and first temperature and humidity sensor are disposed on the outside of the enclosure 1. The raindrop sensor is used to detect the amount of rainfall in the external environment of the enclosure 1, and the first temperature and humidity sensor is used to detect the temperature and humidity in the external environment of the enclosure 1. The wind speed sensor is used to detect the wind speed in the external environment of the enclosure 1. The second temperature and humidity sensor and the fan status monitoring sensor are disposed inside the enclosure 1. The second temperature and humidity sensor is used to detect the temperature and humidity inside the enclosure 1, and the fan status monitoring sensor is used to detect the rotational speed of the first exhaust power component 31, the second exhaust power component 51, and the internal circulation power component 6. The raindrop sensor, the first temperature and humidity sensor, the second temperature and humidity sensor, and the fan status monitoring sensor are all connected to the control device.

[0088] A wind direction sensor can also be installed on the outside of the enclosure 1 to detect wind direction information outside the enclosure 1.

[0089] The raindrop sensor, first temperature and humidity sensor, second temperature and humidity sensor, wind speed sensor, wind direction sensor, and fan status monitoring sensor in this specific embodiment can obtain real-time information on the temperature, humidity, wind speed, wind direction, and rainfall outside the housing 1, as well as the temperature, humidity, and fan status inside the housing 1. This is beneficial for operators to monitor parameter changes inside and outside the housing 1 in real time and make timely adjustments.

[0090] To avoid unforeseen circumstances, a 1:1 backup sensor can be set up for all sensors and installed in an adjacent backup location.

[0091] In addition, a self-learning optimization module can be set up for the photovoltaic transformer rainproof and heat dissipation system in this application. Specifically, a default self-learning cycle of 30 days is set to automatically record sensor data, equipment action data, energy consumption data, and heat dissipation effect data under different operating conditions. Through machine learning algorithms, the timing of triggering the rainproof and heat dissipation collaborative strategy, the opening and closing angle of the electric louvers, the fan speed setting, and the heat dissipation start threshold are continuously corrected to select the optimal energy efficiency ratio operation scheme and automatically update the system parameter library without the need for frequent manual calibration.

[0092] In addition to the aforementioned photovoltaic transformer substation rainproof and heat dissipation system, this invention also provides a rainproof and heat dissipation control method applied to the photovoltaic transformer substation rainproof and heat dissipation system disclosed in the above embodiments. This rainproof and heat dissipation control method includes:

[0093] Step S1: Obtain the first temperature information detected by the second temperature and humidity sensor.

[0094] Step S2: Determine whether the first temperature information is lower than the first preset temperature. If yes, execute the low temperature protection strategy; otherwise, proceed to step S3.

[0095] Step S2: The first preset temperature can be set to 15℃. Of course, depending on the region, season, etc., it can also be set to other values ​​that meet the requirements. The specific value will be determined according to the actual situation, which will not be elaborated here.

[0096] The cryogenic protection strategy in step S2 includes:

[0097] Step S21: Control the opening adjustment device 7 to adjust the opening of the first air inlet 2 and the second air inlet 4 to 15%-25%, and control the speed of the first exhaust power component 31 and the second exhaust power component 51 to decrease or stop.

[0098] Step S21: In the low-temperature protection strategy, the current state as specified in the manual already meets the heat dissipation requirements. Therefore, the opening degree of both the first air inlet 2 and the second air inlet 4 can be adjusted to 15%-25%. In rainy weather, both the first air inlet 2 and the second air inlet 4 can be closed, or only the air inlet on the leeward side can be opened. If the first temperature continues to drop when the opening degree of both the first air inlet 2 and the second air inlet 4 is adjusted to 15%-25%, the speed of the first exhaust fan 31 and the second exhaust fan 51 can be reduced or stopped. If the first temperature continues to drop when the first exhaust fan 31 and the second exhaust fan 51 are stopped, the first air inlet 2 and the second air inlet 4 can be closed.

[0099] Step S22, return to step S1.

[0100] The main purpose of returning to step S1 is to obtain real-time first temperature information so as to make corresponding adjustments based on the real-time first temperature information.

[0101] Step S3: Determine whether the first temperature information is greater than the second preset temperature. If the second preset temperature is higher than the first preset temperature, proceed to step S4; otherwise, maintain the current state.

[0102] Step S4: Obtain rainfall information from the raindrop sensor.

[0103] Step S5: Determine if the rainfall information indicates no rain. If yes, proceed to step S6; otherwise, proceed to step S7.

[0104] In step S5, the rainless state must simultaneously meet three conditions: no signal from the raindrop sensor, light intensity ≥ 6000 Lx, and no abnormalities in 5 consecutive data collections; otherwise, it is judged as suspected rainfall or light rain.

[0105] Step S6: Obtain the second temperature information obtained by the first temperature and humidity sensor and the wind speed information obtained by the wind speed sensor, and determine whether the wind speed information is less than or equal to the first wind speed preset value and greater than or equal to the second wind speed preset value, and whether the difference between the second temperature information and the first temperature information is less than 5°C, and whether the second wind speed preset value is less than the first wind speed preset value; if yes, then execute the natural ventilation strategy; if no, then execute the mechanical assisted heat dissipation strategy.

[0106] In step S6, the first wind speed preset can be set to 8 m / s, and the second wind speed preset can be set to 3 m / s. Of course, the first wind speed preset and the second wind speed preset can also be set to other values ​​that meet the requirements, depending on the actual situation, which will not be elaborated here.

[0107] In step S6, the natural ventilation strategy includes:

[0108] Step S61: Control the opening adjustment device 7 to gradually adjust the opening of the first air inlet 2 and / or the second air inlet 4 from small to large to the fully open state, and control the first exhaust power unit 31 and the second exhaust power unit 51 to stop.

[0109] In step S61, depending on the actual heat dissipation situation, it is possible to choose to open only the first air inlet 2 or open the first air inlet 2 and the second air inlet 4 at the same time. In the initial stage, the opening of the first air inlet 2 and / or the second air inlet 4 can be opened to a smaller degree. When the first temperature information is detected to have increased, the opening of the first air inlet 2 and / or the second air inlet 4 can be further increased.

[0110] Mechanically assisted heat dissipation strategies include:

[0111] Step S62: Determine whether the first temperature information is higher than the third preset temperature. If the third preset temperature is higher than the second preset temperature, control the opening adjustment device 7 to open both the first air inlet 2 and the second air inlet 4, and control the first exhaust power component 31 and the second exhaust power component 51 to rotate. If not, control the opening adjustment device 7 to open the first air inlet 2 and control the first exhaust power component 31 to rotate.

[0112] Step S7: Determine whether the rainfall information is lower than the first preset rainfall value. If so, control the opening adjustment device 7 to adjust the opening of the first air inlet 2 and / or the second air inlet 4 to 15%-25%; control the rotation speed of the first exhaust power component 31 and / or the second exhaust power component 51 to medium speed; if not, control the opening adjustment device 7 to adjust the opening of the first air inlet 2 and the second air inlet 4 to a fully closed state, close the first exhaust power component 31 and the second exhaust power component 51, and open the internal circulation power component 6.

[0113] In step S7, the first rainfall preset value can be 5 mm / h. Depending on the actual situation, the first rainfall preset value can also be set to other values ​​that meet the requirements. The specific value will be determined according to the actual situation and will not be elaborated here.

[0114] In this specific embodiment, the first air inlet 2 and the second air inlet 4 are located at different positions in the housing 1, and the first exhaust vent 3 and the second exhaust vent 5 are also located at different positions in the housing 1. By opening the first air inlet 2 and the second air inlet 4 respectively, ventilation and heat dissipation of different air ducts within the housing 1 can be achieved, effectively optimizing the layout of the air ducts within the housing 1; optimizing the airflow distribution in each chamber, eliminating local overheating, and providing redundant backup for the main air duct formed by the first air inlet 2 and the first exhaust vent 3; operating in parallel with the main negative pressure air duct under high load and high temperature conditions, increasing the air intake area and air exchange volume, thereby improving the system's heat dissipation capacity by more than 30%, meeting the significantly increased demand for heavy-load cooling; connecting ventilation ducts are opened between each chamber, and an internal circulation power component 6 is configured to form an internal micro-circulation air duct. The internal micro-circulation air duct serves as a backup heat dissipation channel in rainy weather closed conditions, achieving air circulation within the chamber when all external air ducts are closed, avoiding heat buildup within the housing 1, and structurally resolving the hard conflict between rain protection and heat dissipation. The main negative pressure air duct, auxiliary side air duct, and internal micro-circulation air duct are activated sequentially and work together according to the priority of low energy consumption. While achieving efficient heat dissipation, they also meet the requirements of rainproof sealing, which can significantly improve the reliability of photovoltaic transformer operation and environmental adaptability.

[0115] After executing the graded rainproof and heat dissipation action, it is determined whether the rainfall has stopped. The rain must be stopped if there is no signal from the raindrop sensor and no rain data for 10 consecutive minutes. If it has not stopped, the graded rainproof and heat dissipation action continues. If it has stopped, the post-rain delay recovery is initiated. After a 10-minute delay, the opening of the first air inlet 2 and the second air inlet 4 is first adjusted to 20°. After running for 5 minutes without any abnormalities, the opening is gradually increased. The first exhaust power component 31 and the second exhaust power component 51 are gradually heated from low speed to medium speed to high speed to avoid sudden temperature changes. Finally, the system returns to the normal heat dissipation mode and restores the judgment process of natural ventilation or mechanical assisted heat dissipation, forming a closed-loop control.

[0116] Specifically, based on the above embodiments, step S7 is followed by:

[0117] Step S8: Obtain rainfall information from the raindrop sensor and continue for a first preset time;

[0118] Step S9: Determine whether the rainfall information remains in a rainless state for the first preset time period; if so, after the second preset time period, control the opening adjustment device 7 to gradually adjust the opening of the first air inlet 2 and the second air inlet 4 from small to large to fully open, and control the rotation speed of the first exhaust power component 31 and the second exhaust power component 51 to gradually increase from low speed to high speed.

[0119] The first preset time can be 10 minutes, and the second preset time can be set to 5 minutes, or the first and second preset times can be set to other values ​​that meet the requirements, which will not be elaborated here.

[0120] This specific embodiment can obtain information on the cessation of rainfall in a timely manner by judging rainfall information in real time, and open the first air inlet 2 and the second air inlet 4 in a timely manner after the rainfall stops to dissipate heat. This can achieve timely heat dissipation after rain and avoid the impact of keeping the first air inlet 2 and the second air inlet 4 closed for a long time on the equipment inside the housing 1.

[0121] In one specific embodiment, the photovoltaic transformer rainproof and heat dissipation system also includes a wind direction sensor, which is used to detect the wind direction of the external environment of the enclosure 1.

[0122] When the rainfall information obtained by the rain sensor indicates a rainy condition, the rainproof heat dissipation control methods include:

[0123] Step S01: Obtain the wind direction information detected by the wind direction sensor and the wind speed information obtained by the wind speed sensor;

[0124] Step S02: Determine whether the wind speed information is greater than the third preset wind speed value. If yes, control the opening adjustment device 7 to adjust the first air inlet 2 and / or the second air inlet 4 on the windward side to the fully closed state, and adjust the opening of the first air inlet 2 and / or the second air inlet 4 on the leeward side to 15%-25%. If no, control the opening adjustment device 7 to adjust the opening of the first air inlet 2 and / or the second air inlet 4 on the windward side to 15%-25%, and adjust the first air inlet 2 and / or the second air inlet 4 on the leeward side to the fully open state.

[0125] The third wind speed preset value is a pre-set wind speed, which can be adjusted according to different regions and actual conditions.

[0126] In this specific embodiment, by setting wind direction and wind speed sensors, the wind speed and wind direction information of the external environment of the enclosure 1 can be obtained in real time. In the event of rainfall, the first air inlet 2 and / or the second air inlet 4 on the windward side can be closed, or the opening of the first air inlet 2 and / or the second air inlet 4 can be reduced when the rainfall is light. Under appropriate circumstances, the first air inlet 2 and / or the second air inlet 4 on the leeward side can be opened to achieve ventilation of the internal chamber of the enclosure 1 in rainy weather and the external environment. While ensuring rain protection, the heat dissipation effect can be further improved, avoiding the conflict between rain protection and heat dissipation.

[0127] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. Any combination of all embodiments provided by this invention is within the scope of protection of this invention and will not be elaborated upon here.

[0128] The above provides a detailed description of the photovoltaic transformer substation rainproof and heat dissipation system and its control method. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of these embodiments are merely illustrative of the method and core concepts of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of this invention.

Claims

1. A photovoltaic transformer substation rainproof and heat dissipation system, characterized in that, include: The housing (1) has an internal chamber for storing functional components; The first air inlet (2) is located at the lower part of at least one side wall of the housing (1); The first exhaust hole (3) is located on the top of the box (1). The first exhaust hole (3) is equipped with a first exhaust power component (31). When the first exhaust power component (31) is in working condition, the gas inside the box (1) can be extracted through the first exhaust hole (3). The second air inlet (4) is located at the upper part of at least one side wall of the housing (1); gas can enter the housing (1) through the first air inlet (2) and the second air inlet (4); The second exhaust hole (5) is provided on the side wall of the housing (1) opposite to the second air inlet (4). The second exhaust hole (5) is provided with a second exhaust power component (51). When the second exhaust power component (51) is in working state, the gas in the housing (1) can be extracted through the second exhaust hole (5). An internal circulation power component (6) is installed inside the housing (1) and is used to accelerate the gas flow inside the housing (1). An opening adjustment device (7) is provided at the first air inlet (2) and the second air inlet (4); The control device is connected to the first exhaust power component (31), the second exhaust power component (51), the internal circulation power component (6) and the opening adjustment device (7) to control the operation of the first exhaust power component (31), the second exhaust power component (51), the internal circulation power component (6) and the opening adjustment device (7).

2. The photovoltaic transformer substation rainproof and heat dissipation system according to claim 1, characterized in that, The first air inlet (2) and the second air inlet (4) are respectively located on different side walls of the housing (1); And / or, the first air inlet (2) and the second air inlet (4) are both provided with dustproof and rainproof nets.

3. The photovoltaic transformer substation rainproof and heat dissipation system according to claim 1, characterized in that, The housing (1) is provided with at least two chambers, and each chamber is provided with a corresponding first air inlet (2) and a corresponding second air inlet (4).

4. The photovoltaic transformer substation rainproof and heat dissipation system according to claim 3, characterized in that, The adjacent chambers are separated by a partition sidewall, and the internal circulation power component (6) is disposed on the partition sidewall; And / or, the internal circulation power component (6) is a circulating fan.

5. The photovoltaic transformer substation rainproof and heat dissipation system according to claim 1, characterized in that, The opening adjustment device (7) includes: The rotating component includes a rotating shaft and a fan blade (71) driven to rotate by the rotating shaft. The fan blade is disposed at the first air inlet (2) and the second air inlet (4). The central axis of the rotating shaft is disposed along the width direction of the first air inlet (2) or the second air inlet (4). Rotate the power component, connect it to the rotating shaft and drive the rotating shaft to rotate, so as to adjust the fan blade (71) to rotate to the fully open angle, the fully closed angle and any angle position between the fully open angle and the fully closed angle; When the fan blade (71) rotates to the fully closed angle, the first air inlet (2) or the second air inlet (4) is in a closed state.

6. The photovoltaic transformer substation rainproof and heat dissipation system according to any one of claims 1-5, characterized in that, It also includes a raindrop sensor, a first temperature and humidity sensor, a second temperature and humidity sensor, a wind speed sensor, and a fan status monitoring sensor; the raindrop sensor, the wind speed sensor, and the first temperature and humidity sensor are disposed on the outside of the housing (1); the raindrop sensor is used to detect the amount of rainfall in the external environment of the housing (1); the first temperature and humidity sensor is used to detect the temperature and humidity in the external environment of the housing (1); and the wind speed sensor is used to detect the wind speed in the external environment of the housing (1). The second temperature and humidity sensor and the fan status monitoring sensor are installed inside the housing (1). The second temperature and humidity sensor is used to detect the temperature and humidity inside the housing (1). The fan status monitoring sensor is used to detect the rotation speed of the first exhaust power component (31), the second exhaust power component (51) and the internal circulation power component (6). The raindrop sensor, the first temperature and humidity sensor, the second temperature and humidity sensor, and the fan status monitoring sensor are all connected to the control device.

7. A rainproof and heat dissipation control method, characterized in that, The rainproof and heat dissipation control method, applied to the photovoltaic transformer substation rainproof and heat dissipation system of claim 6, includes: Obtain the first temperature information detected by the second temperature and humidity sensor; Determine whether the first temperature information is lower than the first preset temperature. If yes, execute the low temperature protection strategy; otherwise, proceed to the next step. Determine whether the first temperature information is greater than the second preset temperature. If the second preset temperature is higher than the first preset temperature, proceed to the next step; otherwise, maintain the current state. Obtain the rainfall information acquired by the raindrop sensor; Determine whether the rainfall information indicates a rainless state. If yes, proceed to the next step; otherwise, proceed to the step of determining rainfall. The system acquires the second temperature information obtained by the first temperature and humidity sensor and the wind speed information obtained by the wind speed sensor, and determines whether the wind speed information is less than or equal to the first preset wind speed value and greater than or equal to the second preset wind speed value, and whether the difference between the second temperature information and the first temperature information is less than 5°C, and whether the second preset wind speed value is less than the first preset wind speed value. If yes, a natural ventilation strategy is executed; if no, a mechanical assisted heat dissipation strategy is executed. If the rainfall information is lower than the first preset rainfall value, then control the opening adjustment device (7) to adjust the opening of the first air inlet (2) and / or the second air inlet (4) to 15%-25%; control the rotation speed of the first exhaust power component (31) and the second exhaust power component (51) to medium speed; if not, control the opening adjustment device (7) to adjust the opening of the first air inlet (2) and the second air inlet (4) to fully closed state, close the first exhaust power component (31) and the second exhaust power component (51), and open the internal circulation power component (6).

8. The rainproof heat dissipation control method according to claim 7, characterized in that, Also includes: Acquire rainfall information from the raindrop sensor and continue for a first preset time; Determine whether the rainfall information remains in a rainless state within the first preset time period; if so, after the second preset time period, control the opening adjustment device (7) to gradually adjust the opening of the first air inlet (2) and the second air inlet (4) from small to large to fully open, and control the rotation speed of the first exhaust power component (31) and the second exhaust power component (51) to gradually increase from low speed to high speed.

9. The rainproof and heat dissipation control method according to claim 7, characterized in that, The cryogenic protection strategy includes: The control opening adjustment device (7) adjusts the opening of the first air inlet (2) and the second air inlet (4) to 15%-25%, and controls the speed of the first exhaust power component (31) and the second exhaust power component (51) to decrease or stop. Return to the previous step to obtain the first temperature information detected by the second temperature and humidity sensor; The natural ventilation strategy includes: The control opening adjustment device (7) gradually adjusts the opening of the first air inlet (2) and / or the second air inlet (4) from small to large to the fully open state, and controls the first exhaust power unit (31) and the second exhaust power unit (51) to stop. The mechanically assisted heat dissipation strategy includes: If the first temperature information is higher than the third preset temperature, and the third preset temperature is higher than the second preset temperature, then control the opening adjustment device (7) to open the first air inlet (2) and the second air inlet (4), and control the first exhaust power component (31) and the second exhaust power component (51) to rotate; if not, then control the opening adjustment device (7) to open the first air inlet (2) and control the first exhaust power component (31) to rotate.

10. A rainproof heat dissipation control method, characterized in that, The photovoltaic transformer rainproof and heat dissipation system described in claim 6 further includes a wind direction sensor, which is used to detect the wind direction of the external environment of the transformer box (1). When the rainfall information acquired by the raindrop sensor indicates a rainy condition, the rainproof heat dissipation control method includes: Obtain the wind direction information detected by the wind direction sensor and the wind speed information obtained by the wind speed sensor; If the wind speed information is greater than the third preset wind speed value, then control the opening adjustment device (7) to adjust the first air inlet (2) and / or the second air inlet (4) on the windward side to the fully closed state, and adjust the opening of the first air inlet (2) and / or the second air inlet (4) on the leeward side to 15%-25%; if not, control the opening adjustment device (7) to adjust the opening of the first air inlet (2) and / or the second air inlet (4) on the windward side to 15%-25%, and adjust the first air inlet (2) and / or the second air inlet (4) on the leeward side to the fully open state.

Images