A new energy box-type substation dry-type transformer air duct heat dissipation control method

Abstract

The application discloses a new energy box-type substation dry-type transformer air duct heat dissipation control method, relates to the technical field of heat dissipation control, and comprises the following steps: calculating the current air duct air inlet quantity according to the inlet air speed and the inlet area corresponding to the air duct inlet area of a target new energy box-type substation; acquiring a fireproof plugging material, determining an arc-shaped area according to the inner contour of the fireproof plugging material; determining an arc-shaped opening according to the fireproof plugging material corresponding to the arc-shaped area; extending the air inlet side of the arc-shaped opening towards the dry-type transformer to obtain an initial air string area; performing area interception on the initial air string area to obtain a front air string section; performing area expansion on the air inlet side of the dry-type transformer to obtain a rear air guide section and an arc piece air string area; and the application can avoid confusion of local air shortage caused by adjustment according to the total air inlet quantity of the air duct.

Description

Technical Field

[0001] This invention relates to the field of heat dissipation control technology, and in particular to a heat dissipation control method for the air duct of a dry-type transformer in a new energy prefabricated substation. Background Technology

[0002] New energy prefabricated substations typically install dry-type transformers in transformer rooms, and external cooling air is delivered to multiple air inlets of the dry-type transformer through air ducts and fans. There is a partition between the transformer room and the adjacent electrical compartment. Cables enter the transformer room through cable holes on the partition. Fireproof sealing material is filled between the cable sheath and the cable holes. When the equipment is running, the fans continuously deliver air, and the cooling air enters the dry-type transformer through each air inlet and carries away the heat.

[0003] When an arc-shaped gap appears between the fireproof sealing material and the cable sheath, some of the cooling air delivered by the fan to the transformer room will flow through the arc-shaped gap to the adjacent electrical compartment. Existing heat dissipation control usually only adjusts the current fan speed or the total air volume of the duct, without considering the location of the arc-shaped gap, the direction of air flow, and the location of each duct inlet area to determine which air inlets are affected, nor can it calculate the amount of air that needs to be supplemented to the corresponding duct. This can easily lead to insufficient cooling air for the affected air inlets. Therefore, it is necessary to solve the problem of difficulty in supplementing air to the affected duct when the arc-shaped gap causes insufficient local air intake. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies that easily lead to insufficient cooling air intake at affected air inlets, and to propose a method for controlling the heat dissipation of air ducts in dry-type transformers in new energy prefabricated substations.

[0005] To address the problems existing in the prior art, the present invention adopts the following technical solution: A method for controlling heat dissipation in the ventilation duct of a dry-type transformer in a new energy prefabricated substation includes: S1. Calculate the current air intake volume of the air duct based on the inlet wind speed and inlet area corresponding to the air duct inlet region in the target new energy box-type substation. S2. Obtain fireproof sealing material, and determine the arc-shaped area based on the inner contour of the fireproof sealing material; determine the arc-shaped opening based on the fireproof sealing material corresponding to the arc-shaped area; extend the arc-shaped opening towards the air inlet side of the dry-type transformer to obtain the initial cross-ventilation area. S3. The initial air-passing area is segmented to obtain the front section of the air-passing; the area is expanded towards the air inlet side of the dry-type transformer to obtain the rear section of the air guide, and the arc-blade air-passing area is obtained. S4. Based on the arc blade crossflow area and the duct inlet area, calculate the arc blade crossflow occupancy degree, and based on the current duct inlet air volume of the duct where the arc blade crossflow occupancy area is located, calculate the arc blade crossflow make-up air volume. S5. Determine the adjustment amount of the operating parameters of the heat dissipation device based on the air supply volume of the arc blades; control the heat dissipation of the air duct based on the adjustment amount of the operating parameters.

[0006] Compared with the prior art, the beneficial effects of the present invention are: 1. By extracting the arc-shaped area between the inner contour of the fireproof sealing material and the outer contour of the cable sheath, and establishing an initial airflow area along the airflow direction, and then combining it with the arc-shaped air guide surface to form an arc-shaped airflow area, the arc-shaped gap can be transformed into an air leakage space, making it easier to determine which air duct inlet areas the cooling air will reach, and to identify the affected air inlets from the source.

[0007] 2. By spatially overlapping the arc-blade cross-flow area with the inlet areas of each duct, the ratio of the cross-flow area to the inlet area is calculated. This ratio is then multiplied by the current air intake volume of the corresponding duct to obtain the arc-blade cross-flow make-up air volume for the affected duct. This ensures that the make-up air value corresponds to the affected air inlet, avoiding the inability to distinguish local air shortages when adjusting based on the total air intake volume of the duct.

[0008] 3. By converting the air volume of the arc blades into the adjustment amount of the adjustable fan's operating parameters through the correspondence between air volume and speed, and then combining it with the current operating parameters to generate air duct heat dissipation control commands, the fan speed can be adjusted according to the affected air duct, so that the corresponding air inlet is supplied with cooling air corresponding to the air loss, improving the local insufficient air intake and maintaining the air duct heat dissipation supply. Attached Figure Description

[0009] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a flowchart illustrating a heat dissipation control method for the air duct of a dry-type transformer in a new energy prefabricated substation, as provided in an embodiment of the present invention. Detailed Implementation

[0010] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0011] This embodiment provides a method for controlling the heat dissipation of the air duct of a dry-type transformer in a new energy prefabricated substation. (See also...) Figure 1 Specifically, including: S1. Calculate the current air intake volume of the air duct based on the inlet wind speed and inlet area corresponding to the air duct inlet region in the target new energy box-type substation. In an embodiment of the present invention, calculating the current air intake volume of the duct includes: The current airflow rate refers to the volumetric flow rate of air entering the corresponding air duct from the cooling air through the inlet area of ​​each air duct of the dry-type transformer at the current data collection time. It is derived from the product of the inlet air velocity and the inlet area of ​​each air duct inlet area, expressed as the volume of air passing through the corresponding air duct inlet area per unit time, and is used to determine the current cooling air volume obtained by the dry-type transformer.

[0012] Identify the transformer room in the target new energy prefabricated substation; The target new energy prefabricated substation refers to the new energy prefabricated substation in this scheme that implements air duct heat dissipation control and is equipped with a transformer room and an electrical compartment. The transformer room refers to the independent compartment in the target new energy prefabricated substation used to install dry-type transformers and form a cooling air flow space. Its boundary is determined by the compartment structure of the target new energy prefabricated substation.

[0013] Specifically, taking the new energy prefabricated substation to be subject to heat dissipation control as the target new energy prefabricated substation, the independent compartment used for installing the transformer and adjacent to the electrical compartment through a partition is found according to the compartment structure of the target new energy prefabricated substation. The boundary of the independent compartment in the compartment structure is matched with the actual compartment boundary in the target new energy prefabricated substation to determine the transformer compartment in the target new energy prefabricated substation.

[0014] Identify the dry-type transformer to be installed in the transformer room; A dry-type transformer is a transformer installed in a transformer room that uses air as the insulation and cooling medium. Its air intake side is equipped with an air intake structure that connects to multiple air duct inlet areas. Cooling air enters the dry-type transformer through the air intake structure and carries away the heat generated during operation.

[0015] Specifically, the search scope is the transformer room in the target new energy prefabricated substation determined in the previous step. The installation position of the transformer located within the boundary of the transformer room is checked according to the equipment layout data of the target new energy prefabricated substation. The transformer with air as the insulation and cooling medium and without insulating oil is confirmed at the transformer installation position. The dry-type transformer installed in the transformer room is then identified.

[0016] Based on the air intake structure of the dry-type transformer, determine the multiple air duct inlet areas where cooling air enters the dry-type transformer; The air intake structure of a dry-type transformer refers to the structure set on the air intake side of the dry-type transformer and defining the path for cooling air to enter. Cooling air refers to the air transported by the air duct and entering the interior of the dry-type transformer through the air intake structure. Multiple air duct inlet areas refer to multiple areas on the air intake structure that are connected to the corresponding air ducts and allow cooling air to pass through. The boundary of each air duct inlet area is defined by the connection edge between the air intake structure and the corresponding air duct.

[0017] Specifically, taking the dry-type transformer installed in the transformer room as the object of treatment, the air intake structure of the dry-type transformer is inspected along the direction in which cooling air enters the dry-type transformer. The edge of the opening on the air intake structure that connects with the air duct and allows cooling air to pass through is taken as the area boundary. The corresponding area is delineated according to each closed opening edge to determine the multiple air duct inlet areas for cooling air to enter the dry-type transformer.

[0018] Obtain the inlet area of ​​each air duct inlet region; The inlet area refers to the cross-sectional area enclosed by the closed boundary of each duct inlet region and through which cooling air passes. Its value is determined according to the actual size of the duct inlet region and is multiplied by the inlet wind speed of the same duct inlet region.

[0019] Specifically, taking the multiple air duct inlet areas of the cooling air entering the dry-type transformer, determined in the previous step, as the measurement object, each air duct inlet area is divided into non-overlapping rectangular, triangular, and circular areas according to the actual boundary dimensions of each air duct inlet area. The area of ​​the rectangular area is obtained by multiplying the length and width of each rectangular area. The area of ​​the triangular area is obtained by multiplying the length of the base of each triangular area by the height perpendicular to the base and dividing by 2. The area of ​​the circular area is obtained by multiplying the radius of each circular area by the same radius and then by pi. The areas of the rectangular, triangular, and circular areas belonging to the same air duct inlet area are added together and converted into square meters to obtain the inlet area of ​​each air duct inlet area.

[0020] Collect the inlet wind speed in each air duct inlet area; Inlet air velocity refers to the speed at which cooling air passes through the corresponding duct inlet area in a direction perpendicular to each duct inlet area at the time of sampling. It is derived from the wind speed measurement results placed in the corresponding duct inlet area and is multiplied by the inlet area of ​​the same duct inlet area.

[0021] Specifically, the duct inlet area corresponding to the inlet area of ​​each duct inlet area obtained in the previous step is used as the collection range. Within each duct inlet area, wind speed collection positions are evenly arranged according to the boundary size of the duct inlet area, so that each wind speed collection position covers the duct inlet area. The measurement direction of the wind speed measuring device is set to be perpendicular to the duct inlet area and towards the direction of cooling air entering the dry-type transformer. The air velocity at each wind speed collection position is recorded at the same collection time. The air velocities recorded in the same duct inlet area are added together and divided by the number of wind speed collection positions to collect the inlet wind velocity of each duct inlet area.

[0022] Multiply the inlet wind speed by the inlet area to obtain the current air intake volume of the duct.

[0023] Specifically, according to the correspondence of the duct inlet areas, the inlet wind speed of each duct inlet area is converted into the inlet wind speed of each duct inlet area expressed in meters per second, the inlet area of ​​the same duct inlet area is converted into the inlet area of ​​the same duct inlet area expressed in square meters, the inlet wind speed of each duct inlet area expressed in meters per second is multiplied by the inlet area of ​​the same duct inlet area expressed in square meters, and the unit of the product is expressed in cubic meters per second, so as to obtain the current air intake of the duct where each duct inlet area is located.

[0024] S2. Obtain fireproof sealing material, and determine the arc-shaped area based on the inner contour of the fireproof sealing material; determine the arc-shaped opening based on the fireproof sealing material corresponding to the arc-shaped area; extend the arc-shaped opening towards the air inlet side of the dry-type transformer to obtain the initial cross-ventilation area. In an embodiment of the present invention, determining the arc-shaped region includes: The arc-shaped area refers to the area in the image of the sealing area on the side of the cable perforation facing the transformer room, located between the outer contour of the cable sheath and the inner contour of the fireproof sealing material, and extending continuously along the circumference of the cable sheath. Its two sides are defined by the outer contour of the cable sheath and the inner contour of the fireproof sealing material, respectively.

[0025] Identify the electrical compartment adjacent to the transformer room, identify the partition between the transformer room and the electrical compartment, and determine the cable penetrations through the partition for the cables to pass through; The electrical compartment refers to the compartment adjacent to the transformer compartment in the target new energy box-type substation, which is used to house electrical equipment. The partition refers to the plate-like structure located between the transformer compartment and the electrical compartment, which separates the two compartment spaces. The cable perforation refers to the hole-like channel that passes through the partition and allows cables to pass from the electrical compartment into the transformer compartment.

[0026] Specifically, taking the transformer room in the target new energy box-type substation determined in the first content as a benchmark, the electrical compartment sharing a boundary with the transformer room is determined according to the compartment structure of the target new energy box-type substation. The plate-like structure at the boundary shared by the transformer room and the electrical compartment is determined as the partition between the transformer room and the electrical compartment. The partition is inspected along the path of the cable from the electrical compartment to the transformer room. The opening on the partition through which the cable passes and the hole wall surrounds the cable is determined as the cable through hole for the cable to pass through.

[0027] Obtain the cable sheath in the cable perforation, and the fireproof sealing material to fill the gap between the cable sheath and the cable perforation; Cable sheath refers to the protective layer that covers the outside of the cable that passes through the cable perforation and extends with the cable. Fireproof sealing material refers to the fire-resistant material that fills the space between the outside of the cable sheath and the inside of the cable perforation and seals the gap between them. It forms a sealing area on the side facing the transformer room.

[0028] Specifically, taking the cable perforation through which the cable passes, determined in the previous step, as the location, the protective layer covering the outside of the cable and passing through the cable perforation with the cable is located from the side of the cable perforation facing the transformer room. The refractory material continuously filling and contacting both sides between the outer surface of the found protective layer and the inner surface of the cable perforation is located. The protective layer is identified as the cable sheath in the cable perforation, and the refractory material is identified as the fireproof sealing material filling the gap between the cable sheath and the cable perforation. Thus, the cable sheath in the cable perforation and the fireproof sealing material filling the gap between the cable sheath and the cable perforation are obtained.

[0029] Images of the sealed area on the side of the cable perforation facing the transformer room were acquired; The sealing area image refers to an image acquired from the side of the cable perforation facing the transformer room, covering the joint between the cable sheath and the fireproof sealing material. The pixel positions in the image correspond to the spatial positions in the sealing area and are used to extract the outer contour of the cable sheath and the inner contour of the fireproof sealing material.

[0030] Specifically, the cable sheath in the cable perforation obtained in the previous step and the fireproof sealing material filling the gap between the cable sheath and the cable perforation are taken as the objects of the image acquisition. The image acquisition device is arranged on the side of the cable perforation facing the transformer room and the acquisition direction is towards the fireproof sealing material. The image acquisition range is adjusted to simultaneously cover the outer surface of the cable sheath, the surface of the fireproof sealing material facing the transformer room, and the joint between the two. The image is acquired under the current sealing state of both to obtain the image of the sealing area on the side of the cable perforation facing the transformer room.

[0031] Extract the outer contour of the cable sheath from the image of the blocked area; The outer contour of the cable sheath refers to the boundary in the image of the blocked area that extends circumferentially along the outer surface of the cable sheath and separates the cable sheath from the area outside it. Its position is determined by the pixel changes between the cable sheath and the adjacent image areas.

[0032] Specifically, taking the image of the sealing area on the side of the cable perforation facing the transformer room acquired in the previous step as the processing object, each pixel in the sealing area image is converted into grayscale value and arranged according to the pixel position to form a grayscale image of the sealing area. The grayscale value change between adjacent pixels in the grayscale image of the sealing area is calculated and the pixel positions where the grayscale value changes continuously are retained. The retained pixel positions are connected to form a candidate contour of the sealing area. From the candidate contour of the sealing area, the continuous contour surrounding the cable sheath and located at the junction of the cable sheath and the fireproof sealing material is retained, and the outer contour of the cable sheath is extracted.

[0033] Extract the inner contour of the fireproof sealing material from the image of the sealed area; The inner contour of the fire-stopping material refers to the contour in the image of the fire-stopping area that extends along the surface of the fire-stopping material toward the cable sheath and defines the inner boundary of the fire-stopping material. Its position is determined by the pixel variation between the fire-stopping material and adjacent image areas.

[0034] Specifically, the image of the sealing area on the side of the cable perforation facing the transformer room, processed in the previous step, is used as the processing object. The pixel area covered by the fireproof sealing material is defined according to the pixel changes of the fireproof sealing material in the sealing area image. Continuous boundary pixels are found along the side of the pixel area covered by the fireproof sealing material facing the cable sheath. The continuous boundary pixels are connected in the adjacent order in the sealing area image to form a closed contour or a contour that extends to the boundary of the sealing area image at both ends. The inner contour of the fireproof sealing material is then extracted.

[0035] Determine the arc-shaped area where the inner contour of the fireproof sealing material is separated from the outer contour of the cable sheath.

[0036] Specifically, the inner contour of the fireproof sealing material extracted from the same sealing area image is superimposed with the outer contour of the cable sheath at the same pixel position. The continuous parts on the inner contour of the fireproof sealing material that do not coincide with the outer contour of the cable sheath and have intervals between the two contours are checked sequentially. The two ends of the continuous parts are respectively mapped to the positions where the inner contour of the fireproof sealing material and the outer contour of the cable sheath coincide again. The two ends are connected along the inner contour of the fireproof sealing material and the outer contour of the cable sheath corresponding to the continuous parts to determine the arc-shaped area where the inner contour of the fireproof sealing material and the outer contour of the cable sheath are separated.

[0037] In an embodiment of the present invention, an initial cross-ventilation area is obtained, including: The initial cross-flow area refers to the spatial area that extends continuously towards the air inlet side of the dry-type transformer, starting from the arc-shaped opening and following the air flow direction of the arc-shaped opening towards the transformer room. Its boundary is determined by the extension range of the arc-shaped opening along the air flow direction of the arc-shaped opening towards the transformer room, and is used to determine the flow range of cooling air before it reaches the arc-shaped guide vane.

[0038] Extract the arc-shaped reattachment sealing piece from the fireproof sealing material corresponding to the arc-shaped area; The arc-shaped back-attach sealing sheet refers to the sheet-like part of the fireproof sealing material corresponding to the arc-shaped area, which is continuously connected to the other fireproof sealing materials and extends towards the cable sheath. Its edge facing the cable sheath forms an arc-shaped opening between the edge of the cable sheath and the outer contour of the cable sheath, and is used to guide the air passing through the arc-shaped opening.

[0039] Specifically, the arc-shaped region where the inner contour of the fireproof sealing material is separated from the outer contour of the cable sheath, as determined in the second part, is mapped onto the sealing area image on the side of the cable perforation facing the transformer room. In the sealing area image on the side of the cable perforation facing the transformer room, fireproof sealing material pixels located outside the arc-shaped region where the inner contour of the fireproof sealing material is separated from the outer contour of the cable sheath and continuously adjacent to the arc-shaped region where the inner contour of the fireproof sealing material is separated from the outer contour of the cable sheath are retained. The retained fireproof sealing material pixels are connected into a sheet-like fireproof sealing material region according to the adjacent relationship along the circumference of the cable sheath. The arc-shaped back-attach sealing sheet is extracted from the fireproof sealing material corresponding to the arc-shaped region.

[0040] Edge extraction is performed on the arc-shaped re-attachment sealing piece to obtain the re-attachment edge; Edge extraction refers to the image processing process of determining the boundary of the arc-shaped back-attached sealing piece based on the pixel changes between the arc-shaped back-attached sealing piece and the adjacent image area. The back-attached edge refers to the continuous edge of the arc-shaped back-attached sealing piece facing the cable sheath and spaced apart from the outer contour of the cable sheath. Its two ends connect with the inner contour of the fireproof sealing material and define one side boundary of the arc-shaped opening.

[0041] Specifically, taking the arc-shaped back-attachment sealing piece extracted in the previous step as the processing object, each pixel within the pixel range of the sealing area image of the arc-shaped back-attachment sealing piece on the side of the cable perforation facing the transformer room, as well as its adjacent pixels, are converted into grayscale values. The grayscale values ​​of adjacent pixels are compared sequentially, and the continuous pixel positions corresponding to the arc-shaped area where the grayscale value changes from the pixel corresponding to the arc-shaped back-attachment sealing piece to the inner contour of the fireproof sealing material and the outer contour of the cable sheath are separated are retained. The continuous pixel positions are connected in an adjacent order along the circumference of the cable sheath, and the edge of the arc-shaped back-attachment sealing piece is extracted to obtain the back-attachment edge.

[0042] Determine the arc-shaped opening between the backing edge and the outer contour of the cable sheath; The arc-shaped opening refers to the arc-shaped opening formed by the interval between the backing edge and the outer contour of the cable sheath. Its two sides are the backing edge and the outer contour of the cable sheath, respectively. Cooling air enters the transformer room from the electrical compartment side through the arc-shaped opening.

[0043] Specifically, the backing edge obtained in the previous step and the outer contour of the cable sheath extracted in the second step are superimposed on the same sealing area image of the cable perforation facing the transformer room. In the sealing area image of the cable perforation facing the transformer room, a continuous pixel area that is adjacent to both the backing edge and the outer contour of the cable sheath and does not belong to the arc-shaped backing sealing piece and the cable sheath is searched. The backing edge and the outer contour of the cable sheath are connected along the two ends of the continuous pixel area respectively, so that the connection positions of the backing edge, the outer contour of the cable sheath and the two ends of the continuous pixel area together define the opening boundary, and the arc-shaped opening between the backing edge and the outer contour of the cable sheath is determined.

[0044] Determine the airflow direction on the side of the arc-shaped opening facing the transformer room; The airflow direction refers to the direction in which the cooling air moves toward the transformer chamber after passing through the arc-shaped opening. It is based on the direction of the partition toward the transformer chamber and is used to control the spatial extension direction of the initial cross-flow area.

[0045] Specifically, using the arc-shaped opening between the backing edge and the outer contour of the cable sheath, determined in the previous step, as the sampling location, the sampling end of the airflow direction measuring device is arranged on the side of the arc-shaped opening between the backing edge and the outer contour of the cable sheath facing the transformer chamber. The sampling direction reference of the airflow direction measuring device is aligned with the normal direction of the partition facing the transformer chamber. The velocity direction of the cooling air entering the transformer chamber through the arc-shaped opening between the backing edge and the outer contour of the cable sheath is collected. The direction from the arc-shaped opening between the backing edge and the outer contour of the cable sheath to the transformer chamber is determined as the airflow direction on the side of the arc-shaped opening facing the transformer chamber.

[0046] Following the direction of airflow, the arc-shaped opening is extended spatially towards the air inlet side of the dry-type transformer to obtain the initial cross-flow area.

[0047] Spatial extension refers to the process of maintaining the boundary relationship of the arc-shaped opening and continuously expanding towards the air inlet side of the dry-type transformer along the air flow direction of the arc-shaped opening towards the transformer room to form a spatial range. The air inlet side of the dry-type transformer refers to the side of the dry-type transformer's air inlet structure facing the direction of the cooling air and connected to multiple air duct inlet areas.

[0048] Specifically, taking the airflow direction of the arc-shaped opening towards the transformer chamber side determined in the previous step as the extension direction, the opening boundary of the arc-shaped opening between the backing edge and the outer contour of the cable sheath is taken as the starting boundary. The starting boundary is continuously translated towards the air inlet side of the dry-type transformer along the airflow direction of the arc-shaped opening towards the transformer chamber side, and the plane where the air inlet side of the dry-type transformer is located is taken as the translation termination position. All the spaces traversed by the starting boundary during the translation process are connected into a continuous spatial region. According to the airflow direction, the space of the arc-shaped opening towards the air inlet side of the dry-type transformer is extended to obtain the initial cross-flow area.

[0049] S3. The initial air-passing area is segmented to obtain the front section of the air-passing; the area is expanded towards the air inlet side of the dry-type transformer to obtain the rear section of the air guide, and the arc-blade air-passing area is obtained. In an embodiment of the present invention, the arc-blade airflow region is obtained, including: The arc-shaped airflow area refers to the continuous spatial area formed by the connection of the front section of the airflow and the rear section of the air guide at the overlapping position. Its initial boundary is an arc-shaped opening. The front part extends along the airflow direction towards the transformer room side along the arc-shaped opening, and the rear part extends towards the air inlet side of the dry-type transformer along the extension direction of the arc-shaped air guide surface. It is used to determine the spatial overlap range between the arc-shaped airflow area and the inlet areas of each air duct.

[0050] The surface of the arc-shaped re-attached sealing piece is extracted to obtain the air guiding surface of the arc piece; Surface extraction refers to the process of identifying continuous surfaces facing the initial cross-flow area from the spatial position of the arc-shaped back-attached sealing plate. The arc-shaped back-attached sealing plate is the surface on the arc-shaped back-attached sealing plate that overlaps with the initial cross-flow area and extends along the air inlet side of the dry-type transformer. After the cooling air comes into contact with the arc-shaped back-attached sealing plate, it flows along the extension direction of the arc-shaped back-attached sealing plate.

[0051] Specifically, taking the arc-shaped back-attached sealing piece extracted in the third content as the measurement object, the spatial position of the exposed surface of the arc-shaped back-attached sealing piece is collected from the transformer room side. The surface spatial position corresponding to the pixel range in the sealing area image of the arc-shaped back-attached sealing piece on the side of the cable perforation facing the transformer room is retained. Adjacent surface spatial positions are connected according to the continuous surface of the arc-shaped back-attached sealing piece, and the surface of the arc-shaped back-attached sealing piece is extracted to obtain the arc-shaped air guide surface.

[0052] Determine the overlap position between the arc blade air guide surface and the initial cross-flow area; The overlapping position refers to the part where the arc-shaped air guide surface and the initial air-passing area occupy the same spatial position. Its starting point corresponds to the position where the initial air-passing area contacts the arc-shaped air guide surface along the air flow direction of the arc-shaped opening towards the transformer room side, and serves as the connection position for intercepting the front section of the air-passing and expanding the rear section of the air guide.

[0053] Specifically, the arc-shaped air guide surface obtained in the previous step and the initial cross-flow area obtained in the third step are converted to the same spatial coordinate system with the surface of the partition facing the transformer chamber as the reference. The spatial positions of each surface on the arc-shaped air guide surface are compared with the boundary range of the initial cross-flow area. The surface spatial positions that are located within the boundary range of the initial cross-flow area and are continuously distributed along the arc-shaped air guide surface are retained, and the surface spatial positions located outside the boundary range of the initial cross-flow area are eliminated. The retained surface spatial positions are combined to form the spatial positions jointly occupied by the arc-shaped air guide surface and the initial cross-flow area, and the overlapping position of the arc-shaped air guide surface and the initial cross-flow area is determined.

[0054] Based on the arc-shaped opening and overlapping positions, the initial airflow area is segmented to obtain the airflow front section; Zone interception refers to the process of preserving the space between the initial airflow area and the overlapping position, using the arc-shaped opening and the overlapping position as boundaries. The airflow front section refers to the initial airflow area that extends from the arc-shaped opening to the overlapping position after zone interception, and is used to connect with the airflow rear section.

[0055] Specifically, the arc-shaped opening between the defined backing edge and the outer contour of the cable sheath is taken as the starting boundary of the initial cross-flow area. The overlapping position of the arc-shaped air guide surface and the initial cross-flow area, determined in the previous step, is taken as the cutting boundary. Along the airflow direction from the arc-shaped opening toward the transformer chamber side, the continuous space extending from the arc-shaped opening between the backing edge and the outer contour of the cable sheath to the overlapping position of the arc-shaped air guide surface and the initial cross-flow area is retained in the initial cross-flow area. The portion of the initial cross-flow area that extends beyond the overlapping position of the arc-shaped air guide surface and the initial cross-flow area and continues toward the air inlet side of the dry-type transformer is removed. Based on the arc-shaped opening and the overlapping position, the initial cross-flow area is cut off to obtain the front section of the cross-flow area.

[0056] Starting from the overlapping position, the area is expanded towards the air inlet side of the dry-type transformer along the extension direction of the arc-shaped air guide surface to obtain the rear section of the air guide. The extension direction of the arc blade air guide surface refers to the direction from the overlapping position along the continuous surface of the arc blade air guide surface toward the air inlet side of the dry-type transformer. The area expansion refers to the process of continuously forming a spatial range from the overlapping position along the extension direction of the arc blade air guide surface. The air guide rear section refers to the spatial area formed by the area expansion and extending from the overlapping position to the air inlet side of the dry-type transformer.

[0057] Specifically, starting from the overlap position between the arc-shaped air guide surface and the initial cross-flow area determined in the preceding steps, the extension direction of the arc-shaped air guide surface is determined by continuously arranging the surface spatial positions adjacent to the overlap position of the arc-shaped air guide surface and the initial cross-flow area to the air inlet side of the dry-type transformer. The spatial boundary connecting the overlap position of the arc-shaped air guide surface and the initial cross-flow area with the front section of the cross-flow area is continuously moved along the extension direction of the arc-shaped air guide surface while maintaining contact with the arc-shaped air guide surface. The plane where the air inlet side of the dry-type transformer is located is used as the termination boundary of the area expansion. The spaces traversed during the movement of the spatial boundary are connected into a continuous spatial area. Starting from the overlap position, the area is expanded towards the air inlet side of the dry-type transformer along the extension direction of the arc-shaped air guide surface to obtain the rear section of the air guide.

[0058] Connect the front section of the airflow and the rear section of the air guide to obtain the arc-bladed airflow area.

[0059] Specifically, the air-cooling front section and air-guiding rear section obtained in the previous steps are converted to the same spatial coordinate system based on the surface of the partition facing the transformer chamber. At the overlap position of the arc-shaped air-guiding surface and the initial air-cooling area, the boundary of the air-cooling front section facing the air inlet side of the dry-type transformer and the starting boundary of the air-guiding rear section are aligned. The space jointly occupied by the air-cooling front section and the air-guiding rear section at the overlap position of the arc-shaped air-guiding surface and the initial air-cooling area are merged. The adjacent boundaries of the air-cooling front section and the air-guiding rear section that do not overlap are connected, so that a continuous space is formed between the arc-shaped opening between the backing edge and the outer contour of the cable sheath and the air inlet side of the dry-type transformer. The air-cooling front section and the air-guiding rear section are connected to obtain the arc-shaped air-cooling area.

[0060] S4. Based on the arc blade crossflow area and the duct inlet area, calculate the arc blade crossflow occupancy degree, and based on the current duct inlet air volume of the duct where the arc blade crossflow occupancy area is located, calculate the arc blade crossflow make-up air volume. In an embodiment of the present invention, calculating the air supply volume for the arc-shaped airflow includes: The air volume of the arc-blade air supply is the volumetric flow rate obtained by multiplying the degree of arc-blade air supply occupancy by the current air intake volume of the air duct in the area occupied by the arc-blade air supply. It is expressed as the volume of air supplied to the corresponding air duct inlet area through the arc-blade air supply area per unit time and is used to determine the adjustment amount of the operating parameters of the corresponding heat dissipation device.

[0061] The arc blade airflow area is spatially overlapped with each air duct inlet area to obtain the arc blade airflow occupied area in the air duct inlet area. Spatial overlap refers to the process of preserving spatial positions that are simultaneously located within the boundary range of the arc-plate airflow area and the duct inlet area in the same spatial coordinate system. The arc-plate airflow occupied area refers to the area jointly occupied by the arc-plate airflow area and the corresponding duct inlet area, and its boundary is defined by the intersection relationship between the boundary of the arc-plate airflow area and the boundary of the corresponding duct inlet area.

[0062] Specifically, the arc-plate airflow area obtained in the fourth part and the multiple air duct inlet areas for cooling air entering the dry-type transformer determined in the first part are converted to the same spatial coordinate system based on the plane where the air inlet side of the dry-type transformer is located. For each air duct inlet area, the spatial position within the arc-plate airflow area is compared with the boundary range of the air duct inlet area. The spatial position that is simultaneously located within the boundary range of the arc-plate airflow area and the corresponding air duct inlet area is retained, and the spatial position located outside the boundary range of the corresponding air duct inlet area is eliminated. The retained spatial positions form a continuous overlapping area in the corresponding air duct inlet area. The arc-plate airflow area and each air duct inlet area are spatially overlapped to obtain the arc-plate airflow occupied area in the air duct inlet area.

[0063] Calculate the airflow area occupied by each arc plate; The cross-sectional area occupied by the airflow refers to the cross-sectional area of ​​the airflow area occupied by the arc blade in the plane of the air duct inlet area. It is derived from the boundary dimension of the airflow area occupied by the arc blade, expressed in square meters, and used to calculate the ratio with the inlet area of ​​the air duct inlet area.

[0064] Specifically, the area occupied by the airflow from the arc blades in each duct inlet region obtained in the previous step is used as the calculation object. For the airflow occupancy area of ​​the arc blades without spatial location, the airflow occupancy area is determined to be 0. For the airflow occupancy area of ​​the arc blades with spatial location, the abscissa and ordinate of each boundary point are obtained sequentially along the boundary of the airflow occupancy area in the plane rectangular coordinate of the duct inlet region where the airflow occupancy area is located. The last boundary point is connected adjacent to the first boundary point. The abscissa of each boundary point is multiplied by the ordinate of the next boundary point in adjacent order and the product is accumulated to obtain the first arc blade airflow occupancy area coordinate product sum. The ordinate of each boundary point is multiplied by the abscissa of the next boundary point in adjacent order and the product is accumulated to obtain the second arc blade airflow occupancy area coordinate product sum. The absolute value of the difference between the first arc blade airflow occupancy area coordinate product sum and the second arc blade airflow occupancy area coordinate product sum is divided by 2 and converted to square meters to calculate the airflow occupancy area of ​​each arc blade airflow occupancy area.

[0065] Obtain the inlet area of ​​the air duct inlet region where the airflow occupies the area of ​​each arc blade; Specifically, using the duct inlet area to which each arc-blade airflow occupies the area obtained in the previous step belongs as the matching object, the spatial boundary of the arc-blade airflow occupies the area is compared with the spatial boundary of each duct inlet area in the first content. The duct inlet areas with the same spatial boundary and containing the arc-blade airflow occupies the area are selected. The inlet area of ​​the corresponding duct inlet area obtained in the first content is associated with the arc-blade airflow occupies the area, and the inlet area of ​​the duct inlet area where each arc-blade airflow occupies the area is located is obtained.

[0066] The ratio of the area occupied by the cross-flow air to the inlet area is calculated to obtain the degree of cross-flow air occupancy of the arc blades. Ratio calculation refers to the process of dividing the area occupied by the cross-flow by the inlet area of ​​the duct inlet where the cross-flow area of ​​the same arc blade is located. The degree of cross-flow occupancy of the arc blade refers to the dimensionless proportion obtained by ratio calculation. Its value represents the proportion of the area occupied by the cross-flow of the arc blade to the area of ​​the duct inlet where it is located, and is used to calculate the air supply volume for cross-flow of the arc blade.

[0067] Specifically, the airflow occupancy area of ​​each arc-blade airflow occupancy area and the inlet area of ​​the air duct inlet area where the same arc-blade airflow occupancy area is located are uniformly converted to square meters. The inlet area of ​​the air duct inlet area where each arc-blade airflow occupancy area is located is compared with 0. When the inlet area of ​​the air duct inlet area where each arc-blade airflow occupancy area is located is equal to 0, the inlet area of ​​the air duct inlet area is obtained again according to the first content, until the inlet area of ​​the air duct inlet area is greater than 0. The airflow occupancy area of ​​each arc-blade airflow occupancy area is divided by the inlet area of ​​the air duct inlet area where the arc-blade airflow occupancy area is located and the obtained ratio is retained. The ratio of the airflow occupancy area and the inlet area is calculated to obtain the arc-blade airflow occupancy degree.

[0068] The arc plate airflow occupancy level is calculated by multiplying the current airflow volume of the air duct in the area occupied by the arc plate airflow.

[0069] Specifically, based on the connection relationship between the air duct inlet area and the air duct where each arc-blade airflow occupies an area, a corresponding data pair is formed by combining the degree of arc-blade airflow occupancy of each arc-blade with the current airflow volume of the air duct where the same arc-blade airflow occupancy area is located, obtained from the first content. The degree of arc-blade airflow occupancy is used as a dimensionless ratio, and the current airflow volume of the air duct is uniformly converted to cubic meters per second. The degree of arc-blade airflow occupancy in the same corresponding data pair is multiplied by the current airflow volume of the air duct, and the product is expressed in cubic meters per second. The product of the degree of arc-blade airflow occupancy and the current airflow volume of the air duct where the arc-blade airflow occupancy area is located is calculated to obtain the arc-blade airflow make-up air volume.

[0070] S5. Determine the adjustment amount of the operating parameters of the heat dissipation device based on the air supply volume of the arc blades; control the heat dissipation of the air duct based on the adjustment amount of the operating parameters.

[0071] In embodiments of the present invention, determining the adjustment amount of the operating parameters of the heat dissipation device includes: The heat dissipation actuator refers to the device installed in the corresponding air duct and implements air duct heat dissipation control by adjusting the air volume. In this solution, the heat dissipation actuator is an adjustable fan. The operating parameter adjustment amount refers to the increase in rotational speed determined according to the correspondence between the arc blade air supply air volume and the air volume adjustment. It is expressed in revolutions per minute and is used to generate air duct heat dissipation control commands.

[0072] Based on the air inlet area corresponding to the air volume of each arc fin, determine the heat dissipation actuator for the corresponding air duct; wherein, the heat dissipation actuator is an adjustable fan; The corresponding air duct refers to the air duct that is directly connected to the air duct inlet area corresponding to the air volume of each arc blade and supplies cooling air to the air duct inlet area. The adjustable fan refers to the fan installed in the corresponding air duct and that can adjust the air volume by changing the speed. It acts as a heat dissipation execution device to execute the air duct heat dissipation control command.

[0073] Specifically, taking the air duct inlet area corresponding to each arc-blade air supply volume obtained in the fifth content as the starting point, the corresponding air duct that supplies cooling air to the air duct inlet area is determined along the connection relationship between the air duct inlet area and the air duct. The fans in the corresponding air duct that can adjust the air volume by changing the speed are checked, and the fans that can adjust the air volume by changing the speed are determined as adjustable fans. According to the air duct inlet area corresponding to each arc-blade air supply volume, the heat dissipation execution device of the corresponding air duct is determined, wherein the heat dissipation execution device is an adjustable fan.

[0074] Obtain the airflow adjustment correspondence for each heat dissipation device; where the airflow adjustment correspondence for adjustable fans is the correspondence between airflow and speed. The air volume regulation correspondence refers to the air volume and speed correspondence data formed based on the air volume measurement results of the adjustable fan within the allowable speed range. Air volume refers to the volume of air delivered by the adjustable fan to the corresponding air duct per unit time, and speed refers to the number of rotations of the adjustable fan per unit time. The air volume and speed correspondence is used to convert the arc blade air supply air volume into the operating parameter adjustment quantity.

[0075] Specifically, taking each adjustable fan determined in the previous step as the acquisition object, multiple speeds covering the allowable speed range are selected according to the allowable speed range indicated by the adjustable fan. The adjustable fan is controlled to reach each speed in sequence, and the air volume delivered by the adjustable fan is measured when the speed measurement value is equal to the corresponding speed. Each speed and the air volume measured at the corresponding speed are combined into corresponding data pairs. The corresponding data pairs are arranged in ascending order of speed to obtain the air volume adjustment correspondence of each heat dissipation device. Among them, the air volume adjustment correspondence of the adjustable fan is the correspondence between air volume and speed.

[0076] Based on the correspondence between the air supply volume of the arc blades and the air volume adjustment, the adjustment amount of the operating parameters of the heat dissipation actuator is determined.

[0077] Specifically, the air volume of each arc-blade air supply is converted into the same unit as the air volume in the corresponding air volume regulation relationship of the heat dissipation actuator. The air volume of the arc-blade air supply is compared with each air volume in the air volume regulation relationship in ascending order. When the air volume of the arc-blade air supply is less than or equal to the minimum air volume, the rotation speed corresponding to the minimum air volume is determined as the rotation speed regulation amount. When the air volume of the arc-blade air supply is greater than or equal to the maximum air volume, the rotation speed corresponding to the maximum air volume is determined as the rotation speed regulation amount. When the air volume of the arc-blade air supply is within an adjacent air volume range, the air volume of the arc-blade air supply is subtracted from the air volume of the adjacent air volume range. The air volume is limited to obtain the air supply difference. The upper limit air volume of the adjacent air volume interval is subtracted from the lower limit air volume of the adjacent air volume interval to obtain the air volume interval difference. The air supply difference is divided by the air volume interval difference to obtain the interval ratio. The upper limit speed of the adjacent air volume interval is subtracted from the lower limit speed of the adjacent air volume interval to obtain the speed interval difference. The interval ratio is multiplied by the speed interval difference and added to the lower limit speed of the adjacent air volume interval to obtain the speed adjustment amount. The speed adjustment amount is used as the operating parameter adjustment amount of the corresponding heat dissipation actuator. Based on the correspondence between the arc fin air supply and air volume adjustment, the operating parameter adjustment amount of the heat dissipation actuator is determined.

[0078] In an embodiment of the present invention, heat dissipation control of the air duct includes: Heat dissipation control refers to the process of adjusting the speed of the adjustable fan in the corresponding air duct according to the heat dissipation control command of the air duct, so that the adjustable fan increases the air volume to the corresponding air duct corresponding to the air volume of the arc blade air supply.

[0079] Obtain the current operating parameters of each heat dissipation device; The current operating parameters refer to the rotational speed of each heat dissipation actuator when the air duct heat dissipation control command is generated. The source is the speed measurement signal of the adjustable fan, expressed in revolutions per minute, and the control speed is determined together with the operating parameter adjustment of the same heat dissipation actuator.

[0080] Specifically, taking each adjustable fan determined in the sixth content as the data acquisition object, the speed measurement signal of the adjustable fan is acquired at the control moment when the air duct heat dissipation control command is generated, the speed measurement signal is converted into a speed value expressed in revolutions per minute, the speed value is associated with the corresponding adjustable fan, and the current operating parameters of each heat dissipation execution device are obtained.

[0081] Based on the current operating parameters and adjustment values ​​of the heat dissipation actuator, generate air duct heat dissipation control commands.

[0082] The air duct heat dissipation control command refers to the control data generated and sent to the corresponding heat dissipation actuator based on the current operating parameters and operating parameter adjustment amount of each heat dissipation actuator. It includes the corresponding heat dissipation actuator and the control speed, and is used to drive the adjustable fan to adjust the speed.

[0083] Specifically, the current operating parameters of each heat dissipation actuator and the adjustment amount of the operating parameters of the same heat dissipation actuator are unified to revolutions per minute (rpm). The current operating parameters and the adjustment amount of the operating parameters are added to obtain the target operating parameters. The target operating parameters are compared with the allowable speed range specified by the corresponding adjustable fan. When the target operating parameters are less than the lower limit of the allowable speed range, the lower limit of the allowable speed range is determined as the control speed. When the target operating parameters are within the allowable speed range, the target operating parameters are determined as the control speed. When the target operating parameters are greater than the upper limit of the allowable speed range, the upper limit of the allowable speed range is determined as the control speed. The control speed and the corresponding heat dissipation actuator are combined to form control data. Based on the current operating parameters and the adjustment amount of the operating parameters of the heat dissipation actuator, a duct heat dissipation control command is generated.

[0084] According to the air duct heat dissipation control command, the air duct is used for heat dissipation control.

[0085] Specifically, the air duct heat dissipation control command generated in the previous step is sent to the corresponding heat dissipation execution device in the air duct heat dissipation control command. The heat dissipation execution device adjusts the speed of the adjustable fan according to the control speed in the air duct heat dissipation control command, collects the adjusted speed of the adjustable fan and compares it with the control speed. When the adjusted speed of the adjustable fan is equal to the control speed at the resolution of the speed measuring device, the speed of the adjustable fan is maintained. When the adjusted speed of the adjustable fan is not equal to the control speed at the resolution of the speed measuring device, the speed of the adjustable fan is adjusted until the two are equal, so that the adjustable fan increases the air volume corresponding to the arc blade air supply volume to the corresponding air duct. According to the air duct heat dissipation control command, the air duct is heat dissipated.

[0086] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for controlling heat dissipation in the ventilation duct of a dry-type transformer in a new energy prefabricated substation, characterized in that, Includes the following steps: S1. Calculate the current air intake volume of the air duct based on the inlet wind speed and inlet area corresponding to the air duct inlet region in the target new energy box-type substation. S2. Obtain fireproof sealing material, and determine the arc-shaped area based on the inner contour of the fireproof sealing material; determine the arc-shaped opening based on the fireproof sealing material corresponding to the arc-shaped area; extend the arc-shaped opening towards the air inlet side of the dry-type transformer to obtain the initial cross-ventilation area. S3. The initial air-passing area is segmented to obtain the front section of the air-passing; the area is expanded towards the air inlet side of the dry-type transformer to obtain the rear section of the air guide, and the arc-blade air-passing area is obtained. S4. Based on the arc blade crossflow area and the duct inlet area, calculate the arc blade crossflow occupancy degree, and based on the current duct inlet air volume of the duct where the arc blade crossflow occupancy area is located, calculate the arc blade crossflow make-up air volume. S5. Determine the adjustment amount of the operating parameters of the heat dissipation device based on the air supply volume of the arc blades; control the heat dissipation of the air duct based on the adjustment amount of the operating parameters.

2. The heat dissipation control method for the air duct of a dry-type transformer in a new energy prefabricated substation according to claim 1, characterized in that, Calculate the current air intake volume in the duct, including: Identify the transformer room in the target new energy prefabricated substation; Identify the dry-type transformer to be installed in the transformer room; Based on the air intake structure of the dry-type transformer, determine the multiple air duct inlet areas where cooling air enters the dry-type transformer; Obtain the inlet area of ​​each air duct inlet region; Collect the inlet wind speed in each duct inlet area; Multiply the inlet wind speed by the inlet area to obtain the current air intake volume of the duct.

3. The heat dissipation control method for the air duct of a dry-type transformer in a new energy prefabricated substation according to claim 2, characterized in that, Determine the arc-shaped region, including: Identify the electrical compartment adjacent to the transformer room, identify the partition between the transformer room and the electrical compartment, and determine the cable penetrations through the partition for the cables to pass through; Obtain the cable sheath in the cable perforation, and the fireproof sealing material to fill the gap between the cable sheath and the cable perforation; Images of the sealed area on the side of the cable perforation facing the transformer room were acquired; Extract the outer contour of the cable sheath from the image of the blocked area; Extract the inner contour of the fireproof sealing material from the image of the sealed area; Determine the arc-shaped area where the inner contour of the fireproof sealing material is separated from the outer contour of the cable sheath.

4. The heat dissipation control method for the air duct of a dry-type transformer in a new energy prefabricated substation according to claim 3, characterized in that, The initial cross-flow area is obtained, including: Extract the arc-shaped reattachment sealing piece from the fireproof sealing material corresponding to the arc-shaped area; Edge extraction is performed on the arc-shaped re-attachment sealing piece to obtain the re-attachment edge; Determine the arc-shaped opening between the backing edge and the outer contour of the cable sheath; Determine the airflow direction on the side of the arc-shaped opening facing the transformer room; Following the direction of airflow, the arc-shaped opening is extended spatially towards the air inlet side of the dry-type transformer to obtain the initial cross-flow area.

5. The heat dissipation control method for the air duct of a dry-type transformer in a new energy prefabricated substation according to claim 4, characterized in that, The airflow area of ​​the arc plate is obtained, including: The surface of the arc-shaped re-attached sealing piece is extracted to obtain the air guiding surface of the arc piece; Determine the overlap position between the arc blade air guide surface and the initial cross-flow area; Based on the arc-shaped opening and overlapping positions, the initial airflow area is segmented to obtain the airflow front section; Starting from the overlapping position, the area is expanded towards the air inlet side of the dry-type transformer along the extension direction of the arc-shaped air guide surface to obtain the rear section of the air guide. Connect the front section of the airflow and the rear section of the air guide to obtain the arc-bladed airflow area.

6. The heat dissipation control method for the air duct of a dry-type transformer in a new energy prefabricated substation according to claim 1, characterized in that, Calculate the air supply volume for the arc-bladed airflow, including: The arc blade airflow area is spatially overlapped with each air duct inlet area to obtain the arc blade airflow occupied area in the air duct inlet area. Calculate the airflow area occupied by each arc plate; Obtain the inlet area of ​​the air duct inlet region where the airflow occupies the area of ​​each arc blade; The ratio of the area occupied by the cross-flow air to the inlet area is calculated to obtain the degree of cross-flow air occupancy of the arc blades. The arc plate airflow occupancy level is calculated by multiplying the current airflow volume of the air duct in the area occupied by the arc plate airflow.

7. The heat dissipation control method for the air duct of a dry-type transformer in a new energy prefabricated substation according to claim 1, characterized in that, Determine the adjustment values ​​of the operating parameters of the heat dissipation device, including: Based on the air inlet area corresponding to the air volume of each arc fin, determine the heat dissipation actuator for the corresponding air duct; wherein, the heat dissipation actuator is an adjustable fan; Obtain the airflow adjustment correspondence for each heat dissipation device; where the airflow adjustment correspondence for adjustable fans is the correspondence between airflow and speed. Based on the correspondence between the air supply volume and the air volume adjustment of the arc blades, the adjustment amount of the operating parameters of the heat dissipation actuator is determined.

8. The heat dissipation control method for the air duct of a dry-type transformer in a new energy prefabricated substation according to claim 1, characterized in that, Heat dissipation control of the air duct includes: Obtain the current operating parameters of each heat dissipation device; Based on the current operating parameters and adjustment values ​​of the heat dissipation actuator, generate air duct heat dissipation control commands; According to the air duct heat dissipation control command, the air duct is used for heat dissipation control.

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