Combined transformer substation for photovoltaic power generation

Abstract

The invention discloses a combined transformer substation for photovoltaic power generation, which comprises a combined transformer substation body, the top end of the combined transformer substation body is provided with a rainproof top cover, the combined transformer substation also comprises an air inlet structure, an exhaust mechanism, an air guide mechanism and a driving mechanism, and the air inlet structure is arranged on the front surface of the combined transformer substation body; the exhaust mechanism is arranged at the top of the combined transformer substation body and located in the rainproof top cover; the air guide mechanism is rotationally connected to the side of the bottom end of the rainproof top cover; the driving mechanism comprises a driving piece and a temperature measuring piece, and the temperature measuring piece is arranged at the top of the combined transformer substation body. The driving mechanism is used for controlling the exhaust mechanism and the air guide mechanism, the heat dissipation mode of the combined transformer substation body is adjusted according to temperature measurement feedback of the temperature measurement piece on the interior of the combined transformer substation body, heat dissipation adjustment of the combined transformer substation body is more flexible, power waste is avoided, and meanwhile the heat dissipation efficiency of the combined transformer substation body is improved. And the heat dissipation stability of the combined transformer substation body is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of substations, and particularly relates to a combined substation for photovoltaic power generation. Background Art

[0002] A combined substation, also known as a combined substation or an integrated substation, is a form of substation that integrates substation equipment, including transformers, switchgear, and protection devices, in a compact space. This type of substation usually adopts a modular design. Therefore, in order to ensure the stable operation of each device in the substation, many exhaust hole structures are added to the front of the substation to assist in heat dissipation.

[0003] In order to ensure the stable operation of the substation, attention needs to be paid to some sealing properties of the substation. Therefore, the exhaust hole structure is relatively small, and in order to prevent sundries and dust from entering the interior of the substation, the openings of the exhaust hole structures are mostly opened downward. However, during the peak electricity consumption period in summer, each device in the substation is in a high-load operation state. Therefore, the existing heat dissipation method through exhaust holes cannot timely discharge the heat inside the substation, thereby reducing the operation efficiency of the substation. Therefore, it is necessary to flexibly adjust the heat dissipation form of the substation. In view of this, this solution proposes a combined substation for photovoltaic power generation to flexibly adjust the heat dissipation of the substation. Summary of the Invention

[0004] The purpose of the present invention is to provide a combined substation for photovoltaic power generation to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A combined substation for photovoltaic power generation, including a combined substation body, a rainproof top cover is provided at the top of the combined substation body, and further includes: An intake structure, which is arranged on the front of the combined substation body and is used for intake when the combined substation body dissipates heat; An exhaust mechanism, which is arranged on the top of the combined substation body and is located inside the rainproof top cover, and the exhaust mechanism is used for upward air extraction; A gas guiding mechanism, which is rotatably connected to the side of the bottom end of the rainproof top cover, and the gas guiding mechanism cooperates with the exhaust mechanism to guide the external discharge of the hot air inside the combined substation body; A driving mechanism, which includes a driving member and a temperature measuring member. The temperature measuring member is arranged on the top of the combined substation body, and the driving member starts to rotate by receiving a temperature measuring signal, and the driving member drives the adjustment of the exhaust mechanism and the gas guiding mechanism through rotation.

[0006] Preferably, the air intake structure comprises a blocking unit, and the blocking unit is arranged around and enclosed on the side of the combined substation body. A plurality of air intake protrusions are arranged on the front side of the blocking unit, and the openings of the plurality of air intake protrusions are all downward.

[0007] Preferably, a closed cover is provided between the top of the combined substation body and the bottom end of the rainproof top cover, the exhaust mechanism is inserted and connected to the middle part of the closed cover, the temperature measuring component is arranged at the bottom end of the closed cover, the driving component is arranged at the top end of the closed cover, and the sides of the bottom end of the rainproof top cover are respectively provided with a first exhaust port and a second exhaust port, the first exhaust port is used for exhausting the front and back of the combined substation body, the second exhaust port is used for exhausting the two sides of the combined substation body, and the air guide mechanism is rotated and inserted and connected to the first exhaust port and the second exhaust port respectively.

[0008] Preferably, the air guide mechanism comprises: first air guide blades, wherein a plurality of the first air guide blades are respectively rotated and inserted into a plurality of first exhaust ports; Second air guide blades, multiple second air guide blades are respectively rotated and interspersed and connected in multiple second exhaust ports, multiple second air guide blades and two ends of multiple first air guide blades are arranged in a rectangular shape, linkage parts are provided between the two ends of the second air guide blades and the first air guide blades, and the rotation adjustment of the second air guide blades and the first air guide blades is controlled by rotating the exhaust structure.

[0009] Preferably, the linkage comprises: A first support rotating rod, wherein the first support rotating rod is fixedly connected to an end of the first air guide blade, the first support rotating rod is rotatably inserted and connected to an end of the first exhaust port, and a first bevel gear is provided at one end of the first support rotating rod away from the first air guide blade; A second supporting rotating rod, the second supporting rotating rod is fixedly connected to the end of the second air guide fan blade, the second supporting rotating rod is rotatably inserted and connected to the end of the second exhaust port, and a second bevel gear is provided at one end of the second supporting rotating rod away from the second air guide fan blade, and the tooth side of the second bevel gear is meshed with the tooth side of the first bevel gear.

[0010] Preferably, the exhaust mechanism comprises: An exhaust duct, the exhaust duct is rotatably connected to the middle of the closed cover plate, the top of the exhaust duct is a closed structure, the top of the exhaust duct is provided with air guide ports symmetrically in the center, and the bottom of the exhaust duct is provided with a support net; A fan is arranged in the exhaust duct and located at the top of the supporting net, and is used to accelerate the airflow at the bottom of the exhaust duct and guide it to the air guide port for discharge, and the rotation of the fan is adjusted by feedback from the temperature measuring element; A toggle member is disposed on the outer wall of the exhaust duct and is used to toggle the first air guide blade to flip.

[0011] Preferably, the toggle member comprises: A first moving blade, wherein the first moving blade is fixedly connected to the top of the exhaust duct, and the first moving blade moves the first air guide blade downward by pressing downward; The second moving blade is fixedly connected to the bottom of the exhaust duct and is located below one of the air guide ports. The second moving blade lifts the first air guide blade upward by squeezing, and the second moving blade, the first moving blade and the outer wall of the exhaust duct are arranged at a horizontal angle of ninety degrees.

[0012] Preferably, an arc-shaped tooth pressure plate is provided at the bottom of the exhaust duct, and the arc-shaped tooth pressure plate is used for meshing and transmitting with the driving member.

[0013] Preferably, the driving member comprises: A connecting bracket, wherein the connecting bracket is fixedly connected to the top end of the closed cover plate; The driving motor is detachably mounted on the top of the connecting bracket, and the output end of the driving motor is fixedly connected with a toggle gear, the outer wall of the toggle gear is meshed with the tooth side of the arc-shaped tooth pressure plate, and the operation of the driving motor is controlled by feedback of the temperature measuring component.

[0014] Preferably, the temperature measuring component includes a temperature sensor and a temperature feedback system; The temperature sensor is used to detect the internal heat of the combined substation body, and the communication end of the temperature sensor is electrically connected to the control end of the drive motor and the fan; The temperature feedback system includes a temperature and speed feedback unit and a temperature and rotation direction feedback unit. The temperature and speed feedback unit is arranged at the control end of the fan. The temperature and speed feedback unit adjusts the fan blade speed in combination with the temperature feedback from the temperature sensor. The temperature and rotation direction feedback unit is arranged at the control end of the drive motor. The temperature and rotation direction feedback unit adjusts the rotation direction of the output end of the drive motor in combination with the temperature feedback from the temperature sensor. The output end of the drive motor is used to drive the exhaust duct to rotate through forward and reverse rotation, and the rotation angle range of the exhaust duct is 0°-90°.

[0015] Technical effects and advantages of the present invention: The present invention provides an exhaust structure at the top of the modular substation body. According to the principle that hot air rises, the exhaust mechanism is used to accelerate the exhaust of hot air from the top of the modular substation body, so that the modular substation body can exhaust heat more quickly, thereby ensuring more efficient operation in the modular substation body. The present invention is provided with a gas guiding mechanism in cooperation with the exhaust mechanism, which can dissipate heat to different degrees according to the needs of the combined substation body, and can adjust the direction of the hot gas discharged from the top of the combined substation body, so as to make the heat dissipation of the combined substation body more flexible. Furthermore, it can avoid the hot gas discharged from being inhaled back into the combined substation body from the front of the combined substation body under high heat dissipation conditions, ensuring the stability of the heat dissipation of the combined substation body under high heat dissipation conditions. The driving mechanism of the present invention is used to control the exhaust mechanism and the gas guiding mechanism. By means of the temperature measurement feedback of the temperature measuring component on the inside of the combined substation body, the heat dissipation mode of the combined substation body is adjusted, making the heat dissipation adjustment of the combined substation body more flexible. While avoiding waste of power, it also ensures the stability of the heat dissipation of the combined substation body. Brief Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of the whole of the present invention.

[0017] Figure 2 It is a schematic connection diagram of the closed cover, the exhaust mechanism, the gas guiding mechanism and the driving mechanism of the present invention.

[0018] Figure 3 It is a schematic connection diagram of the exhaust mechanism, the gas guiding mechanism and the driving mechanism of the present invention.

[0019] Figure 4 It is a schematic structural diagram of the gas guiding mechanism of the present invention.

[0020] Figure 5 It is a schematic connection diagram of the end part of the gas guiding mechanism of the present invention.

[0021] Figure 6 It is one of the schematic connection diagrams of the exhaust mechanism and the driving mechanism of the present invention.

[0022] Figure 7 It is the second schematic connection diagram of the exhaust mechanism and the driving mechanism of the present invention.

[0023] Figure 8 It is a bottom view of the connection of the exhaust mechanism and the driving mechanism of the present invention.

[0024] In the figure: 1. Combined substation body; 101. Blocking unit; 102. Air inlet protrusion; 2. Rainproof top cover; 201. Closing cover; 202. First exhaust port; 203. Second exhaust port; 3. First air guide blade; 301. First supporting rotating rod; 302. First bevel gear; 4. Second air guide blade; 401. Second supporting rotating rod; 402. Second bevel gear; 5. Exhaust duct; 501. First shifting blade; 502. Second shifting blade; 503. Arc-shaped tooth pressure plate; 504. Air guide port; 505. Support net; 6. Connecting bracket; 7. Driving motor; 701. Steering gear; 8. Temperature sensor; 9. Fan. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of 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.

[0026] Embodiment 1, the present invention provides as follows Figure 1-8 A photovoltaic power generation combined substation shown in the figure includes a combined substation body 1, a rainproof top cover 2 is arranged on the top of the combined substation body 1, and also includes: An air intake structure, which is arranged on the front of the combined substation body 1 and is used for air intake when the combined substation body 1 dissipates heat; Specifically, the air intake structure includes a sealing unit 101, which is arranged around the side of the combined substation body 1. A plurality of air intake protrusions 102 are arranged on the front of the sealing unit 101, and the openings of the plurality of air intake protrusions 102 are all downward. By setting the air intake protrusions 102 downward, the combined substation body 1 can take in air while preventing dust from falling into the combined substation body 1 under the action of gravity.

[0027] It should be noted that the combined substation body 1 includes a transformer, switchgear, distribution equipment, protection devices, measurement equipment, control system, cooling system, casing and structural support and grounding system; The transformer is the core equipment of the combined substation, which is used to convert high-voltage electrical energy into low-voltage electrical energy for easy power distribution and use. The selection of the transformer is usually based on the load demand and network architecture; the switching equipment includes circuit breakers, disconnectors, and load switches, which are used to control the on-off of the circuit, protect the equipment and personnel safety, and isolate faults; the power distribution equipment includes busbars, switchboards, etc., which are used to distribute electrical energy to different loads and lines; the protection device includes relays, which are used to monitor the operating status of electrical equipment, detect and handle faults in a timely manner, and ensure the safe operation of the equipment; the measuring equipment includes ammeters, voltmeters, and wattmeters, which are used to monitor and record electrical parameters such as current, voltage, and power in real time; the control system includes an automated control system and a monitoring system, which are used to monitor, control, and collect data from the equipment in the substation, realizing remote monitoring and automated management; for large transformers, a cooling system needs to be equipped to ensure that the equipment maintains an appropriate temperature during operation. In the existing structural settings of the combined substation body 1, air intake protrusions 102 are mostly arranged on the front for ventilation and heat dissipation; the combined substation usually adopts a closed or semi-closed structure to protect the internal equipment from the influence of the external environment and provide good safety. In this solution, the blocking unit 101 is used for the semi-sealing of the combined substation body 1. The blocking unit 101 is combined by a plate and a door frame structure, and an area that can be opened is set to facilitate the maintenance of the internal equipment of the combined substation body 1. The grounding system is an important part of ensuring the safety of equipment and personnel, which can effectively prevent electric leakage and static electricity accumulation.

[0028] Embodiment 2: The present invention provides an exhaust mechanism, which is applied to the combined substation for photovoltaic power generation in Embodiment 1. The exhaust mechanism is arranged at the top of the combined substation body 1 and is located inside the rainproof top cover 2, and the exhaust mechanism is used for upward air extraction; Specifically, a closed cover plate 201 is arranged between the top of the combined substation body 1 and the bottom end of the rainproof top cover 2. The exhaust mechanism is inserted and connected to the middle of the closed cover plate 201. The temperature measuring element is arranged at the bottom end of the closed cover plate 201, and the driving element is arranged at the top end of the closed cover plate 201. First exhaust ports 202 and second exhaust ports 203 are respectively opened at the side edges of the bottom end of the rainproof top cover 2. The first exhaust port 202 is used for exhausting air from the front and back of the combined substation body 1, and the second exhaust port 203 is used for exhausting air from both sides of the combined substation body 1.

[0029] It should be noted that the first exhaust port 202 and the second exhaust port 203 are respectively arranged on the four sides of the top of the combined substation body 1, and the first exhaust port 202 is located in the front and back areas of the combined substation body 1, and the second exhaust port 203 is located in the two side areas of the combined substation body 1, and the first exhaust port 202 and the second exhaust port 203 are arranged obliquely upward along the bottom end of the rainproof top cover 2. Therefore, the hot air discharged from the inside and outside of the combined substation body 1 can be discharged into the air more quickly in an inclined manner, thereby ensuring that the air temperature in the surrounding environment of the combined substation body 1 is relatively low.

[0030] In the third embodiment, the present invention provides an air guide mechanism, which is applied to a photovoltaic power generation combined substation in the first embodiment. The air guide mechanism is rotatably connected to the side of the bottom end of the rainproof top cover 2. The air guide mechanism cooperates with the exhaust mechanism to guide the exhaust of hot air in the combined substation body 1. The air guide mechanism is rotatably connected to the first exhaust port 202 and the second exhaust port 203 respectively. In the fourth embodiment, the present invention provides a driving mechanism, which is applied to a combined substation for photovoltaic power generation in the first embodiment. The driving mechanism includes a driving component and a temperature measuring component. The temperature measuring component is arranged on the top of the combined substation body 1, and the driving component starts to rotate by receiving a temperature measuring signal, and the driving component drives the exhaust mechanism and the air guide mechanism to adjust by rotation.

[0031] Specifically, the air guide mechanism includes: First air guide blades 3, a plurality of first air guide blades 3 are respectively rotated and inserted into the plurality of first exhaust ports 202; The second air guide blades 4, the multiple second air guide blades 4 are respectively rotated and interspersed and connected in the multiple second exhaust ports 203, the multiple second air guide blades 4 and the two ends of the multiple first air guide blades 3 are arranged in a rectangular shape, and a linkage is provided between the two ends of the second air guide blades 4 and the first air guide blades 3, and the rotation adjustment of the second air guide blades 4 and the first air guide blades 3 is controlled by the rotation of the exhaust structure.

[0032] It should be noted that the second air guide blades 4 and the first air guide blades 3 respectively block the second exhaust port 203 and the first exhaust port 202. Therefore, by adjusting the rotation angle of the second air guide blades 4 and the first air guide blades 3, the degree of opening of the second exhaust port 203 and the first exhaust port 202 can be adjusted. In the setting of this scheme, the two second air guide blades 4 and the two ends of the two first air guide blades 3 are arranged in a rectangular shape, and the two second air guide blades 4 and the two ends of the two first air guide blades 3 are close to each other, and are uniformly adjusted and controlled through linkage parts.

[0033] Furthermore, the linkage includes: The first support rotating rod 301 is fixedly connected to the end of the first air guide fan blade 3. The first support rotating rod 301 is rotatably inserted through the end of the first exhaust port 202. A first bevel gear 302 is provided at one end of the first support rotating rod 301 away from the first air guide fan blade 3; The second support rotating rod 401 is fixedly connected to the end of the second air guide fan blade 4. The second support rotating rod 401 is rotatably inserted through the end of the second exhaust port 203. A second bevel gear 402 is provided at one end of the second support rotating rod 401 away from the second air guide fan blade 4. The tooth side of the second bevel gear 402 meshes with the tooth side of the first bevel gear 302.

[0034] It should be noted that cavities are provided in the four corner areas at the bottom of the rainproof top cover 2. The end parts of the first support rotating rod 301 and the second support rotating rod 401 are respectively rotatably inserted through the cavities. Through the insertion of the first support rotating rod 301 and the second support rotating rod 401 into the cavities, the insertion points are used as the supports for rotation. And the first bevel gear 302 and the second bevel gear 402 mesh in the cavities. Through such a structural arrangement, when any one of the second air guide fan blades 4 or the first air guide fan blades 3 rotates, it will drive the first bevel gear 302 and the second bevel gear 402 to engage and transmit through the conduction of the first support rotating rod 301 and the second support rotating rod 401. And in the setting of this solution, the second air guide fan blades 4 and the first air guide fan blades 3 have a rotational misalignment angle. Thus, when the second air guide fan blades 4 or the first air guide fan blades 3 rotate, the first exhaust port 202 and the second exhaust port 203 are adjusted with different clearances, so that the exhaust form of the combined substation body 1 can be flexibly adjusted, and then different exhaust and heat dissipation forms can be adjusted according to different heat dissipation situations.

[0035] Specifically, the exhaust mechanism includes: The exhaust air duct 5 is rotatably inserted through the middle of the closed cover plate 201. The top end of the exhaust air duct 5 is a closed structure. Air guide ports 504 are symmetrically arranged at the center of the top of the exhaust air duct 5. A support net 505 is provided at the bottom end of the exhaust air duct 5; It should be noted that through the setting of the exhaust air duct 5, the heat dissipation channel at the top of the combined substation body 1 is composed of the exhaust air duct 5. Therefore, the air guide ports 504 are the hot air discharge outlets of the combined substation body 1. Therefore, by adjusting the range of the air guide ports 504, the hot air in the combined substation body 1 can be adjusted through the first exhaust port 202 or the second exhaust port 203.

[0036] The fan 9 is arranged in the exhaust duct 5 and is located at the top of the support net 505. The fan 9 is used to accelerate the airflow at the bottom of the exhaust duct 5 and guide it to the air guide port 504 for discharge. The rotation of the fan 9 is adjusted by the feedback of the temperature measuring component. The support net 505 is detachably connected to the exhaust duct 5 by screw connection. The support net 505 is used to support the fan 9 in the exhaust duct 5, and ensure that the hot air in the combined substation body 1 can enter the exhaust duct 5, and then be discharged from the air guide port 504. A toggle member is disposed on the outer wall of the exhaust air cylinder 5 and is used to toggle the first air guide blade 3 to flip.

[0037] Further, the toggle member includes: A first moving blade 501, which is fixedly connected to the top of the exhaust duct 5, and the first moving blade 501 moves the first air guide blade 3 downward by pressing downward; The second moving blade 502 is fixedly connected to the bottom of the exhaust duct 5 and is located below one of the air guide ports 504. The second moving blade 502 lifts the first air guide blade 3 upward by squeezing, and the second moving blade 502 and the first moving blade 501 are arranged at a horizontal angle of ninety degrees to the outer wall of the exhaust duct 5.

[0038] It should be noted that both the first moving blade 501 and the second moving blade 502 are designed with an arc surface structure. The top end of the first moving blade 501 is an arc surface, and the arc decreases according to the rotation direction of the exhaust duct 5. In this way, when the first moving blade 501 rotates following the exhaust duct 5, the arc surface at its top gradually supports the first air guide blade 3, thereby lifting the first air guide blade 3 to flip it. Similarly, the bottom end of the second moving blade 502 is an arc surface, and the arc gradually increases according to the rotation direction of the exhaust duct 5. When the second moving blade 502 approaches another first air guide blade 3, it will press down on the first air guide blade 3 to flip it.

[0039] Specifically, an arc-shaped tooth pressure plate 503 is provided at the bottom of the exhaust air cylinder 5, and the arc-shaped tooth pressure plate 503 is used for meshing and transmitting with the driving member; The drive components include: A connecting bracket 6, the connecting bracket 6 is fixedly connected to the top of the closing cover plate 201; The driving motor 7 is detachably mounted on the top of the connecting bracket 6, and the output end of the driving motor 7 is fixedly connected with a shifting gear 701, the outer wall of the shifting gear 701 is meshed with the tooth side of the arc-shaped tooth pressure plate 503, and the operation of the driving motor 7 is controlled by feedback of the temperature measuring component.

[0040] It should be noted that, through the meshing design of the arc-shaped toothed pressure plate 503 and the toggle gear 701, when the toggle gear 701 is rotated, the arc-shaped toothed pressure plate 503 drives the exhaust duct 5 to rotate, and drives the motor 7 to rotate forward and reverse, and at the same time, the exhaust duct 5 rotates forward or reverse within a maximum range of ninety degrees. Therefore, driven by the rotation of the exhaust duct 5, the first toggle blade 501 and the second toggle blade 502 can lift and press down the symmetrically arranged first air guide blade 3, and then, driven by the linkage, the air guide direction and form of the entire air guide mechanism can be adjusted.

[0041] Specifically, the temperature measuring component includes a temperature sensor 8 and a temperature feedback system; The temperature sensor 8 is used to detect the internal heat of the combined substation body 1, and the communication end of the temperature sensor 8 is electrically connected to the control end of the drive motor 7 and the fan 9; The temperature feedback system includes a temperature and speed feedback unit and a temperature and rotation direction feedback unit. The temperature and speed feedback unit is arranged at the control end of the fan 9. The temperature and speed feedback unit adjusts the speed of the fan blades of the fan 9 in combination with the temperature feedback from the temperature sensor 8. The temperature and rotation direction feedback unit is arranged at the control end of the drive motor 7. The temperature and rotation direction feedback unit adjusts the rotation direction of the output end of the drive motor 7 in combination with the temperature feedback from the temperature sensor 8. The output end of the drive motor 7 is used to drive the exhaust duct 5 to rotate by forward and reverse rotation, and the rotation angle range of the exhaust duct 5 is 0°-90°.

[0042] It should be noted that corresponding signal processing modules are respectively provided at the control ends of the drive motor 7 and the fan 9, and the processing modules respectively process the temperature and rotation direction feedback unit and the temperature and speed feedback, and the temperature sensor 8 adopted in this scheme adopts a linear temperature sensor, which is used to collect the ambient temperature in the combined substation body 1 in real time, and output an analog voltage signal to the signal processing module of the drive motor 7 and the fan 9. The ADC unit of the signal processing module converts the analog signal into a digital temperature value and executes the threshold judgment logic, and the drive parts of the drive motor 7 and the fan 9 receive the direction control signal (IN1-IN4) and the PWM speed regulation signal (ENA / ENB) of the corresponding signal processing module respectively; The output control of the drive motor 7 is expressed as: The forward and reverse directions are controlled by the thresholds T1_low and T1_high, and the direction is switched by the high and low levels of IN1 / IN2 or IN3 / IN4; If the temperature is less than or equal to the first low temperature threshold (T1_low), a forward signal is output (IN1 = high level, IN2 = low level); If the temperature is ≥ the first high temperature threshold (T1_high), an inversion signal is output (IN1 = low level, IN2 = high level); If the temperature is between the two thresholds, the motor is stopped (IN1=IN2=low level).

[0043] The output control of fan 9 is expressed as: The speed is adjusted according to the multi-level thresholds (including T2_low, T2_med, T2_high), and the PWM duty cycle determines the motor speed (0-255 corresponds to 0-100%); When the temperature is ≤ the second low temperature threshold (T2_low), an inverted low-speed PWM signal is output (IN3 = low level, IN4 = high level, ENB = 25% duty cycle); When the temperature is in the second medium temperature threshold (T2_med), an inverted medium-speed PWM signal (ENB=50% duty cycle) is output; When the temperature is ≥ the second high temperature threshold (T2_high), a forward high-speed PWM signal is output (IN3 = high level, IN4 = low level, ENB = 100% duty cycle).

[0044] The temperature threshold dual adjustment method of the present invention, through multi-level dynamic response and two-way control design, makes it possible for the first air guide blade 3 to close the first exhaust port 202, and the second air guide blade 4 to open the second exhaust port 203 when the combined substation body 1 needs to perform high-speed heat dissipation. At the same time, the air guide port 504 faces the second exhaust port 203, so that exhaust and heat dissipation are carried out from both sides of the combined substation body 1, avoiding a large amount of hot air from gathering on the front side of the combined substation body 1 and re-entering the combined substation body 1 through the air intake protrusion 102, thereby significantly improving the efficiency, reliability and economy of the heat dissipation of the substation, and is particularly suitable for substation scenarios with high load and high ambient temperature difference.

[0045] Through the above-mentioned adjustment control, when the driving motor 7 adjusts the rotation direction, it rotates the arc-shaped toothed pressure plate 503 through the toggle gear 701 at the output end, thereby driving the exhaust duct 5 to rotate, and the maximum rotation angle of the exhaust duct 5 in forward and reverse rotation is ninety degrees. Under such a rotation angle limit, it can correspond to the setting of the first toggle blade 501 and the second toggle blade 502 at a ninety-degree angle, that is, when the exhaust duct 5 rotates ninety degrees clockwise, the first toggle blade 501 and one group of the first air guide blades 3 are set at a ninety-degree angle, thereby pressing the first air guide blades 3 down to the maximum flipping angle. At this time, the first air guide blades 3 close the first exhaust port 202. At the same time, under the rotation of the exhaust duct 5, the air guide port 504 rotates ninety degrees to face the second exhaust port 203; Similarly, when the exhaust duct 5 rotates ninety degrees counterclockwise, the second moving blade 502 is set at a ninety-degree angle with another group of first air guide blades 3, thereby lifting the first air guide blades 3 to flip, thereby opening the first exhaust port 202 to the maximum state, and the second air guide blades 4 at the second exhaust port 203 rotate to close, and at the same time, the air guide port 504 of the exhaust duct 5 is opposite to the first exhaust port 202.

[0046] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A combined substation for photovoltaic power generation, comprising a combined substation body (1), wherein a rainproof top cover (2) is provided at the top of the combined substation body (1), characterized in that: Also includes: An air intake structure, the air intake structure being arranged on the front side of the combined substation body (1), and the air intake structure being used for taking in air when the combined substation body (1) dissipates heat; An exhaust mechanism, the exhaust mechanism being arranged on the top of the combined substation body (1) and located inside the rainproof top cover (2), the exhaust mechanism being used to draw air upwards; An air guide mechanism, the air guide mechanism being rotatably connected to the side of the bottom end of the rainproof top cover (2), the air guide mechanism being used in conjunction with the exhaust mechanism to guide the exhaust of hot air from the combined substation body (1); A driving mechanism, the driving mechanism comprising a driving component and a temperature measuring component, the temperature measuring component being arranged on the top of the combined substation body (1), and the driving component starting to rotate by receiving a temperature measuring signal, and the driving component driving the exhaust mechanism and the air guide mechanism to adjust by rotating.

2. A photovoltaic power generation combined substation according to claim 1, characterized in that: The air intake structure comprises a blocking unit (101), the blocking unit (101) being arranged around and surrounding the side of the combined substation body (1), a plurality of air intake protrusions (102) being arranged on the front of the blocking unit (101), and the openings of the plurality of air intake protrusions (102) are all facing downwards.

3. A photovoltaic power generation combined substation according to claim 1, characterized in that: A closed cover plate (201) is arranged between the top of the combined substation body (1) and the bottom end of the rainproof top cover (2), the exhaust mechanism is connected through the middle of the closed cover plate (201), the temperature measuring component is arranged at the bottom end of the closed cover plate (201), the driving component is arranged at the top end of the closed cover plate (201), and the sides of the bottom end of the rainproof top cover (2) are respectively provided with a first exhaust port (202) and a second exhaust port (203), the first exhaust port (202) is used for exhausting the front and back of the combined substation body (1), and the second exhaust port (203) is used for exhausting the two sides of the combined substation body (1), and the air guide mechanism is connected through the first exhaust port (202) and the second exhaust port (203) at the first exhaust port (202) and the second exhaust port (203) at the second exhaust port (203).

4. A photovoltaic power generation combined substation according to claim 3, characterized in that: The air guide mechanism comprises: First air guide blades (3), a plurality of the first air guide blades (3) being rotatably interlaced and connected to the plurality of first exhaust ports (202); Second air guide blades (4), a plurality of the second air guide blades (4) are respectively rotatably interlaced and connected in a plurality of second exhaust ports (203), the plurality of the second air guide blades (4) and the two ends of the plurality of the first air guide blades (3) are arranged in a rectangular shape, a linkage is provided between the two ends of the second air guide blades (4) and the first air guide blades (3), and the rotation adjustment of the second air guide blades (4) and the first air guide blades (3) is controlled by the rotation of the exhaust structure.

5. A photovoltaic power generation combined substation according to claim 4, characterized in that: The linkage comprises: A first supporting rotating rod (301), the first supporting rotating rod (301) being fixedly connected to an end of the first air guide blade (3), the first supporting rotating rod (301) being rotatably inserted and connected to an end of the first exhaust port (202), and a first bevel gear (302) being provided at one end of the first supporting rotating rod (301) away from the first air guide blade (3); A second supporting rotating rod (401), the second supporting rotating rod (401) being fixedly connected to an end of the second air guide blade (4), the second supporting rotating rod (401) being rotatably inserted and connected to an end of the second exhaust port (203), a second bevel gear (402) being provided at one end of the second supporting rotating rod (401) away from the second air guide blade (4), the tooth side of the second bevel gear (402) being meshed with the tooth side of the first bevel gear (302).

6. A photovoltaic power generation combined substation according to claim 4, characterized in that: The exhaust mechanism comprises: An exhaust duct (5), the exhaust duct (5) being rotatably inserted and connected to the middle part of the closed cover plate (201), the top end of the exhaust duct (5) being a closed structure, the top of the exhaust duct (5) being provided with air guide ports (504) in a centrally symmetrical manner, and the bottom end of the exhaust duct (5) being provided with a support net (505); A fan (9), the fan (9) being arranged in the exhaust duct (5) and located at the top of the support net (505), the fan (9) being used to accelerate the airflow at the bottom of the exhaust duct (5) and guide it to the air guide port (504) for discharge, the rotation of the fan (9) being adjusted by feedback from a temperature measuring component; A toggle member, the toggle member being arranged on the outer wall of the exhaust air cylinder (5), and the toggle member being used to toggle the first air guide blade (3) to flip.

7. A photovoltaic power generation combined substation according to claim 6, characterized in that: The toggle member comprises: A first moving blade (501), the first moving blade (501) being fixedly connected to the top of the exhaust air duct (5), and the first moving blade (501) is pressed downward to move the first air guide blade (3) to flip downward; A second moving blade (502), the second moving blade (502) is fixedly connected to the bottom of the exhaust duct (5) and is located below one of the air guide ports (504), the second moving blade (502) is pressed and lifted to flip up the first air guide blade (3), and the second moving blade (502) and the first moving blade (501) are arranged at a horizontal angle of ninety degrees to the outer wall of the exhaust duct (5).

8. A photovoltaic power generation combined substation according to claim 6, characterized in that: An arc-shaped toothed pressure plate (503) is provided at the bottom of the exhaust air cylinder (5), and the arc-shaped toothed pressure plate (503) is used for meshing with a driving member for transmission.

9. A photovoltaic power generation combined substation according to claim 8, characterized in that: The driving member comprises: A connecting bracket (6), the connecting bracket (6) being fixedly connected to the top end of the closing cover plate (201); A drive motor (7), wherein the drive motor (7) is detachably mounted on the top of the connecting bracket (6), an output end of the drive motor (7) is fixedly connected to a toggle gear (701), an outer wall of the toggle gear (701) and a tooth side of the arc-shaped tooth pressure plate (503) are meshed with each other, and the operation of the drive motor (7) is controlled by feedback of a temperature measuring component.

10. A photovoltaic power generation combined substation according to claim 9, characterized in that: The temperature measuring component comprises a temperature measuring sensor (8) and a temperature feedback system; The temperature sensor (8) is used to detect the internal heat of the combined substation body (1), and the communication end of the temperature sensor (8) is electrically connected to the control end of the drive motor (7) and the fan (9); The temperature feedback system comprises a temperature and rotation speed feedback unit and a temperature and rotation direction feedback unit. The temperature and rotation speed feedback unit is arranged at the control end of the fan (9). The temperature and rotation speed feedback unit adjusts the rotation speed of the fan blades (9) in combination with the temperature feedback from the temperature measuring sensor (8). The temperature and rotation direction feedback unit is arranged at the control end of the drive motor (7). The temperature and rotation direction feedback unit adjusts the rotation direction of the output end of the drive motor (7) in combination with the temperature feedback from the temperature measuring sensor (8). The output end of the drive motor (7) is used to drive the exhaust duct (5) to rotate by forward and reverse rotation. The rotation angle range of the exhaust duct (5) is 0°-90°.

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