272results about "Enclosed substations" patented technology

The invention discloses a cooperative control method and system for noise reduction and fire prevention of a transformer substation. The method comprises the following steps: determining the acoustic impedance mutation degree of an original composite board according to the frequency and amplitude distribution of target low-frequency noise of the transformer substation; when the acoustic impedance abrupt change degree exceeds an abrupt change threshold value, optimizing a first physical parameter of the original composite board; the heat flow density of the first composite board obtained through optimization is obtained, and if the heat flow density exceeds a fireproof threshold value, a second physical parameter of the first composite board is optimized; obtaining a noise penetration index of the target low-frequency-band noise in the second composite board obtained through optimization, and if the noise penetration index does not exceed a penetration threshold value, optimizing a third physical parameter of the second composite board; and determining final physical parameters corresponding to the acoustic-thermal performance balance point according to the acoustic impedance distribution and the thermal conductivity distribution of the third composite board obtained through optimization so as to adjust the structure of the third composite board. According to the invention, collaborative optimization of sound absorption frequency band characteristics and fireproof performance can be realized, and both noise reduction and fire prevention can reach an ideal state at the same time.

A method and system are disclosed for providing electrical power from a utility electric grid to a fracturing operation, and an electrically powered fracturing system. A mobile substation includes at least two transformer units that are operatively coupled to the utility electric grid in a parallel orientation, wherein the transformer units are capable of accessing power from the utility electric grid and stepping down the power for delivery to a switchgear. An electric motor is operatively coupled to a hydraulic fracturing pump and operatively controlled by a variable frequency drive. At least one open air relay cable is operatively coupled between the switchgear and the electric motor and capable of delivering power to the electric motor.

The utility model belongs to the field of box-type substations, and particularly relates to a box-type substation top cover and a box-type substation. The box-type transformer substation top cover is used for solving the technical problems that the part, fixedly connected with a box-type transformer substation box body, of an existing box-type transformer substation top cover is blocked by foreign objects after being installed, and field disassembly and assembly are not convenient. The box-type transformer substation is used for solving the technical problems that an existing box-type transformer substation is inconvenient to install on site and high in labor cost. The top cover of the box transformer substation comprises a bent enclosure frame and a cover plate which is fixedly lapped on the bent enclosure frame, and the bent enclosure frame is provided with a lapping end which is lapped with a box body of the box transformer substation. First connecting plates are arranged on the inner sides of the frame corners of the bent enclosure frame, and detachable connecting structures are arranged on the first connecting plates so that the first connecting plates can be detachably connected with fixed connecting structures on the box body of the box-type transformer substation to achieve detachable fixing of the bent enclosure frame and the box body of the box-type transformer substation. Therefore, the detachable connecting structure on the first connecting plate can be far away from the box wall of the box body of the box-type transformer substation and is not easily blocked by electronic equipment in the box body of the box-type transformer substation, so that the detachable connecting structure is convenient to detach during field installation.

The utility model discloses an anti-immersion American transformer station comprising a box station, the two ends of the front side of the box station are rotatably connected with station doors, the outer side of the box station is fixedly provided with a waterproof plate, the upper part of one side of the box station is fixedly provided with a motor protection cover, the front side of the box station is fixedly provided with a rubber frame, and the surface of the rubber frame is provided with a clamping groove. Magnet pieces are evenly arranged on the surface of a clamping groove in the surface of the rubber frame in an adhesive mode, a rubber clamping ring is fixed to the surface of the station door, and a metal piece is arranged in the rubber clamping ring. According to the anti-immersion American transformer substation, the anti-seepage effect of the American transformer substation can be improved through clamping and sealing of the L-shaped waterproof plates at the heat dissipation holes in the surface of the box station, the rubber frame in the box station and the rubber clamping ring on the surface of the station door.

The invention relates to the technical field of high-voltage transformer substations, and discloses a heat dissipation adjusting device of a high-voltage transformer substation, which comprises a high-voltage transformer substation assembly, the high-voltage transformer substation assembly further comprises a high-voltage transformer substation shell, and the side surface of the high-voltage transformer substation shell is fixedly connected with an oil outlet pipe; the side face of the high-voltage transformer substation shell is fixedly provided with an external ventilation opening, the inner wall of the high-voltage transformer substation shell is fixedly connected with a fan assembly, the fan assembly comprises a motor, a chain, a fan and a gear, and the external ventilation opening can generate a large amount of heat during operation of high-voltage transformer substation equipment and discharges the heat through air convection. And the fan assembly fan actively sucks cold air, exhausts hot air, strengthens air convection around the equipment and rapidly takes away heat, so that the phenomena that insulation aging is accelerated, the conductivity is reduced and even faults are caused due to the fact that the temperature of the equipment is too high are avoided.

The invention discloses a buried transformer substation convenient to operate and maintain, which comprises a concrete base layer, two threading grooves are formed in the concrete base layer, four fixing rods are pre-embedded in the concrete base layer, a sealing box is arranged at the top of the concrete base layer, and mounting plates are fixedly connected to the left and right sides of the sealing box. Inserting grooves are formed in the two mounting plates, and the four fixing rods are sleeved with nuts in threaded connection with the fixing rods. Compared with a traditional installation mode that a special well body needs to be built, the method has the advantages that the building difficulty is effectively reduced, the construction period is shortened, the cost is reduced, meanwhile, workers can complete operation and maintenance of the box-type substation on the ground, the operation and maintenance difficulty is effectively reduced, and the operation and maintenance efficiency is improved. While the operation and maintenance speed is increased, the risk of falling of workers in the operation and maintenance process can be avoided, and then the operation and maintenance safety is improved.

The utility model discloses a high-protection high-low voltage preassembled transformer substation, which relates to the technical field of preassembled transformer substations and comprises a cabinet body, a shutter assembly is mounted on the side wall of the cabinet body, a partition plate is fixedly mounted in the cabinet body, and the interior of the cabinet body is divided into a dehumidification space and an installation space through the partition plate. A first through hole communicated with the dehumidification space and the installation space is formed in the partition plate, a sealing cover is installed on the inner side wall of the cabinet body, a ventilation fan is installed in the sealing cover in a sliding mode, a second electric push rod is fixedly installed in the sealing cover, and the telescopic end of the second electric push rod is fixedly connected with the side wall of the ventilation fan. The sealing cover is provided with a second through hole and a third through hole which are communicated with the cabinet body. According to the utility model, humidity monitoring and processing can be carried out in time, equipment short circuit caused by moisture can be prevented, the protection performance of a transformer substation is improved, and economic loss caused by production interruption is avoided.

The utility model belongs to the field of transformer substations, particularly relates to a multifunctional intelligent box-type transformer substation, and aims to solve the problems that the operation space is small due to the restriction of a door frame when workers carry out operations such as inspection, maintenance and the like, and particularly, the operation range is greatly limited when multiple persons are required to carry out the operations. The transformer substation comprises a transformer substation box body, the two side box doors are hinged to box openings in the two sides of the transformer substation box body respectively; the two groups of box door pieces are arranged at a box opening in the front surface of the transformer substation box body, and each group of box door pieces comprises two front box doors; the two sliding grooves are used as sliding rails of the front box doors, the two front box doors in the same set of box door pieces are rotated by 90 degrees to be opened, and then the front box doors can slide at will, so that the problem that an original door frame restrains workers is solved, a better working environment is provided, and the box door is suitable for the scene where multiple persons need to operate at the same time.

The embodiment of the utility model discloses a portable foldable pedal for a fan box transformer substation, and is characterized in that the foldable pedal comprises a first folding plate and a second folding plate, the first folding plate and the second folding plate are hinged at a first edge, the first folding plate and the second folding plate are hinged at a second edge and a third edge through connecting rods respectively, and the connecting rods are connected with the first folding plate and the second folding plate. The expansion angle of the first folding plate and the second folding plate is limited; a plurality of first hooks are arranged on the face, away from the second folding plate, of the first folding plate so that the first folding plate can be fixed to the fan box transformer substation. According to the portable foldable pedal, the two folding plates are spliced and unfolded to form an angle suitable for a worker to tread during use, and the folding plates can be folded to complete storage to reduce occupied space; meanwhile, the fixing effect and safety can be guaranteed through the hook fixing mode and the connecting rod hinging mode on the two sides, manual climbing in the fan box transformer substation overhauling process can be facilitated, and the operation efficiency is improved.

The invention belongs to the technical field of buried box-type substations, and particularly relates to an anti-overload new energy buried box-type substation, which comprises a buried shell, an anti-overload new energy distribution box connected to the side wall of the buried shell through a lifting assembly, and a raft plate arranged below the buried shell, and a plurality of polyurethane elastic cushions are fixedly connected between the raft plate and the buried shell. Soil pressure borne by the box body can be dispersed by means of the raft plate, uneven stress generated by soil settlement is buffered and absorbed by means of the buffering deformation characteristic of the polyurethane elastic cushion, the connecting stability of the box body and a foundation is enhanced through the supporting piles, and the problems of box body deformation and cracking and equipment connecting structure damage caused by soil settlement are effectively avoided; and the adjusting cylinder, the adjusting bolt and the supporting seat are additionally arranged between the buried shell and the raft, the height of the buried shell is accurately adjusted through the adjusting bolt, flexible correction of the levelness of the box body is achieved, and long-term stable operation of equipment is guaranteed.

According to the intelligent substation convenient to assemble, protrusions in a protrusion assembly and rails in a rail set are correspondingly matched one to one, a protrusion assembly inlet is formed in the position, on a base, of one end of the rail set, the rail set on the base is longer than the protrusion assembly, and a baffle inserting groove is vertically formed in the position, close to the protrusion assembly inlet, of the rail set; the baffle is inserted into the baffle insertion groove to close the protrusion assembly inlet and fix the protrusion assembly. The cabinet has the advantages that the cabinet body and the base are assembled in an embedded mode, after the base is embedded, a solid is convenient to disassemble and install, the cabinet body is firmly fixed, and water leakage is not prone to occurring. And multiple cabinet bodies are installed and linked mutually, so that the stability is further improved.

The application provides a mobile relay protection device for substation load transfer, comprising: a mobile relay protection box, the bottom of the box is provided with wheels and a locking mechanism for realizing the movement and fixation of the box; a mobile relay protection device installed in the box, the device comprises a line protection module and a main transformer protection module; a special connecting cable, one end of which is fixedly connected with the mobile relay protection device, and the other end is provided with a marked special connector, the special connector is configured as a quick connection plug for detachable connection with a terminal block of a substation interval terminal box or a terminal block of a control cabinet; wherein the special connecting cable adopts a flexible and pressure-resistant cable, and the current terminal wiring structure of the quick connection plug is designed to prevent open circuit.

The utility model relates to box type substation technical field, concretely is a heat dissipation type box type substation, include: box, exhaust port and air inlet, the outer side wall fixed setting of box has the exhaust port, and the below of exhaust port is provided with air inlet, the outer side wall fixed setting of box has the connecting block, and the connecting block fixed setting has the limit slot, and the connecting assembly and auxiliary assembly are provided on the box, through being provided with connecting assembly and auxiliary assembly on the connecting end box of heat dissipation type box type substation, through the cooperation use among support frame, dust screen, filter screen etc. structure, can install after the dismantling cleaning airing of dust screen and filter screen, and can replace in time after dust screen and filter screen are damaged, and the exhaust port and air inlet air are unobstructed, will not influence the heat dissipation of box type substation box.

This utility model provides a prefabricated box-type substation enclosure structure, including a substation body and multiple support leg mechanisms. Multiple mounting rings are horizontally fixedly connected to the bottom end of the inner surface of the substation body, and the multiple support leg mechanisms are respectively fixedly connected to the bottom ends of the mounting rings. This prefabricated box-type substation enclosure structure, by setting multiple support leg mechanisms, allows for individual adjustment of the multiple support leg structures. During adjustment, the height of each support leg can be adjusted by rotating the threaded sleeve. Furthermore, during actual installation, because the rotating seat at the bottom of the threaded sleeve rotates horizontally while the connecting seat rotates vertically, a structure similar to a caster wheel is formed, adapting to various road surfaces. This makes installation more convenient and ensures the enclosure remains level during later use, thereby improving the practicality of the substation.

This utility model relates to a ventilation structure for a prefabricated substation, including a box and a transformer. The transformer includes a lower base and an upper yoke. A transformer fan is mounted on the base. The transformer is located inside the box on one side. Multiple sets of forward and reverse fans are located at the upper end of the box corresponding to the transformer, and bottom ventilation holes are located at the bottom corresponding to the transformer. Ventilation windows are located on the lower ends of both sides of the box. A first temperature sensor is located on the side of the box without the transformer, a second temperature sensor is located on the transformer base, and a third temperature sensor is located on the upper yoke. Ventilation adjustment components are located on both sides of the box, each including a movable baffle. The ventilation windows are blocked by the corresponding baffle. This utility model is designed to address special conditions such as uneven internal temperature and low external temperature environments in prefabricated substations, enabling flexible adjustment according to ventilation needs under different circumstances.

This utility model discloses a locking device for a substation, including a base, a housing mounted on top of the base, and a door hinged to the front surface of the housing; a locking assembly, including an insert plate mounted on the front surface of the door, a threaded groove on the front surface of the insert plate, a stabilizing seat mounted on the top of the base and located on one side of the housing, a slot on the front surface of the stabilizing seat for the threaded groove to be inserted, a threaded hole on the rear surface of the stabilizing seat and communicating with the slot, and a threaded rod threadedly connected to the threaded hole, one end of which can be threadedly connected to the threaded groove; and a knob mounted on the other end of the threaded rod. The beneficial effects of this utility model are: through the designed locking assembly, the open door can be stabilized. Compared with the existing technology of positioning rod and positioning hole cooperation, it effectively avoids the friction and wear problem caused by frequent insertion and removal, improves the locking stability of the door, and ensures the safety of substation equipment maintenance and other operations.

The present invention discloses an integrated control system for a box-type substation, which relates to the technical field of substation control. The system includes a monitoring module for obtaining first state information of the target box-type substation when there is no fault and second state information when there is a fault according to the three-dimensional model data, temperature data, gas data and control instructions of the target box-type substation; and a control module for obtaining a fault prediction result according to the three-dimensional model data, current temperature data and gas data. By performing fault prediction on the box-type substation according to the gas data and obtaining the fault prediction result, accurate early warning can be realized at the initial stage of the fault of the box-type substation, so that at the initial stage of the fault, the fault of the box-type substation can be warned and actively processed, and the permanent fault can be eliminated before it occurs, reducing the probability of power outage accidents caused by equipment failures, thereby improving the power supply quality and service quality.

This utility model discloses a top cover, a box-type power station, and a box-type room. The top cover includes a cover plate, an upper baffle, a lower baffle, and a perforated plate. The cover plate includes a downward-curving eave. The upper baffle abuts against the cover plate. The lower baffle includes a bottom and at least one side. The perforated plate is located inside and below the cover plate, and its edges abut against the lower baffle. The perforated plate and the cover plate are joined together to form a first air duct. The eave, the upper baffle, and the lower baffle are staggered and joined together to form a curved second air duct. This utility model can achieve better ventilation and heat dissipation effects and a higher level of protection.

To provide a power reception facility in which a gas insulation switching device main body and a mobile device connector part can be housed in an indoor space at low cost without providing a dead space in the site of the facility, and connection with a mobile device can be easily established even when the gas insulation switching device main body and the mobile device connector part are housed in an indoor space.SOLUTION: A power reception facility 1 includes a gas insulation switching device main body 2 and a mobile device connector part 3. The gas insulation switching device main body 2 and the mobile device connector part 3 are separate from each other but are normally connected through a cable 20 for movement. The gas insulation switching device main body 2 and the mobile device connector part 3 are housed in a tent-type building 300, and wheels 40 are attached to the mobile device connector part 3. A rail 302 on which the wheels 40 are put is disposed in the tent-type building 300. The mobile device connector part 3 can move along the rail 302 in an area from a prescribed position in the tent-type building 300 to an entrance 301, and can move freely in an area outside the entrance 301.SELECTED DRAWING: Figure 2

The utility model relates to an assembly structure for a preassembled transformer substation in the technical field of transformer substation assembly, which comprises two slide rails which are arranged in parallel at an interval, the top surface of each slide rail is provided with a guide groove with an opening at the upper end, and the bottom of each slide rail is provided with a plurality of height-adjustable block-up blocks at intervals along the axial direction; sliding parts embedded in the guide grooves are arranged at the two ends of the sliding plate respectively; the jacking piece is arranged on the lower plate surface of the sliding plate and used for driving the sliding plate to be separated from the sliding rail to ascend; according to the utility model, through the cooperation of the sliding plate and the sliding rail, the assembly part can enter from the side opening of the transformer substation shell, and the assembly part is moved to a preassembling position by combining the jacking piece; according to the heightening block of the slope-screw linkage mechanism, horizontal movement of the second block is driven by rotating the adjusting screw to be converted into vertical lifting of the first block, height adjustment of the sliding rail is achieved, and the heightening block adapts to complex ground conditions.

A system includes an enclosure (140) that includes a tank (150), a first compartment (160) including a first interior region, a second compartment (170) including a second interior region, and an electrical assembly (110) in an interior of the tank (150). The electrical assembly (110) is electrically connected to an electrical conductor (191) of each of one or more bushings (190) in the second interior region. The system also includes a control apparatus (130) in the first interior region. The control apparatus (130) is coupled to the electrical assembly (110), and the first and second compartments (160, 170) are on opposite sides of the tank (150). The electrical apparatus (110) may be a voltage regulator (210).

The utility model provides an operating tool for replacing a pole-mounted transformer without power cut, which comprises a mobile box transformer vehicle, a first rotating frame is fixed at the top of the mobile box transformer vehicle, a first rotating shaft is rotatably matched in the first rotating frame, two supporting rods are fixed on the first rotating shaft, and hydraulic cylinders are fixed in the supporting rods. A lifting basket is arranged at the output end of the hydraulic cylinder, a sliding plate is arranged in the lifting basket, a crawling ladder is fixed to the movable box transformer substation vehicle, an upward sliding device is arranged on the movable box transformer substation vehicle, and the upward sliding device comprises a placing plate, a sliding structure and a limiting structure. According to the utility model, the first rotating frame is fixed at the top of the mobile box transformer vehicle, the hydraulic cylinder is arranged in the supporting rod, and the lifting basket is arranged at the output end of the hydraulic cylinder, so that a worker can be directly conveyed to a high place through the supporting rod and the lifting basket on the mobile box transformer vehicle; and heavy devices and tools can be conveniently transported.

The utility model relates to the technical field of prefabricated cabins, in particular to a prefabricated cabin with a drainage structure, which comprises a prefabricated cabin main body, a roof is mechanically fixed at the top end of the prefabricated cabin main body, and drainage mechanisms are mechanically fixed on two sides of the outer wall of the prefabricated cabin main body and the top end of the roof. A plurality of heat dissipation mechanisms are arranged on the two sides of the outer wall of the prefabricated cabin body, communicate with the interior of the prefabricated cabin body and are located on one side of the drainage mechanism. Rainwater at the top end of a roof can slide down through the drainage eave and is far away from the outer wall of the prefabricated cabin body through mutual cooperation of internal parts of the drainage mechanism, and rainwater can circulate in the upper air channel and finally drip into the lower air channel when entering the upper air channel through mutual cooperation of internal parts of the heat dissipation mechanism. And the rainwater is discharged from the interior of the prefabricated cabin main body from the lower air passage, so that the rainwater can be prevented from remaining in the prefabricated cabin main body to influence internal equipment of the prefabricated cabin main body.

The utility model provides a prefabricated substation, and relates to the technical field of substations. The prefabricated substation comprises a low-voltage chamber, a transformer chamber and a medium-voltage chamber which are sequentially arranged in the length direction. An oil conservator, a radiator and a fan are arranged in the transformer chamber. The oil conservator is used for containing an iron core and a coil of the transformer. The radiator comprises a first oil pipe and a second oil pipe, and the first oil pipe and the second oil pipe are arranged in the height direction and both communicated with the interior of the oil conservator. And the fan is arranged below or above the radiator. The top side of the transformer chamber is open. The side, opposite to the radiator and the fan, of the transformer chamber is open in the width direction. Under the effect of the fan, air flows into the transformer chamber from the side portion of the transformer chamber, then flows through the radiator and takes away heat of the radiator, and then flows out from the top side of the transformer chamber. The fan improves the heat exchange efficiency between the radiator and the outside air, and further improves the heat dissipation efficiency of the prefabricated substation.

The application discloses a rat-proof baffle in a transformer substation, which comprises a rat-proof baffle and guide rails installed on both sides of the bottom plate of the rat-proof baffle. The rat-proof baffle comprises a bottom plate and a panel, the material of the panel is polyester fabric, and two fixed buckles are arranged on the side of the panel away from the bottom plate. The guide rails are attached to the door frame, and the top of each guide rail is provided with a fixed buckle connecting piece at the overlapping position of the vertical projection of the door frame. The bottom plate is connected with the guide rails through connecting buckles. The material of the panel is changed from the original aluminum material to polyester fabric, so that the rat-proof baffle is more simple to disassemble and install. Meanwhile, when large instruments are carried into and out of the equipment function room, the possibility of colliding with the equipment is greatly reduced, the safety during operation is improved, and the work efficiency is greatly improved.

The present invention relates to an American box-type transformer, and in particular to an American box-type transformer with an anti-theft function. The present invention provides an American box-type transformer with an anti-theft function, including a box body, a radiator, a box door, a lock body, a mounting plate, a lock core and a protrusion, etc. A radiator is arranged on the back of the box body, and the box body is provided with box doors arranged oppositely and connected by hinges. The left and right sides of the box door are respectively a cover door and an inset door, and the connection between the two can be sealed by interlocking. The cover door part of the box door is fixedly connected with a lock body, and a lock core is rotatably connected in the lock body, and protrusions are symmetrically fixed on the periphery of the lock core. When an illegal person opens the lock core without knowing it, the lock core rotates the lock core to a greater than a specified angle, and the lock core drives the rack to move downward through the active gear. After the contact contacts the receiver, the buzzer will sound an alarm, and at the same time, the card rod will be embedded in the rack and fixed, and the buzzer will continue to sound to warn and deter the illegal person.

The utility model discloses a be applicable to high altitude type wind power box transformer of north guizhou area, including wind power box transformer body, high pressure chamber, low pressure chamber and transformer room are arranged in wind power box transformer body respectively, install wind power step -up transformer on transformer room, through set up anti -icing mechanism mechanism etc.

The present invention discloses a box-type substation, which relates to the field of substations and includes a transformer box that is vertically arranged; a fire extinguisher assembly that is arranged at the bottom of the transformer box. The fire extinguisher assembly includes a dust-proof cover that is hinged to the transformer box and fixed to the transformer box through a locking member; a cavity that is arranged at the bottom of the transformer box for placing the fire extinguisher assembly; a placement frame inside which a fire extinguisher is placed, and the placement frame is rotationally suspended at the top of the cavity through a rotating cylinder. It solves the problem that a fire is likely to occur inside the transformer box. In a conventional transformer box, a fire extinguisher is not installed inside. If the fire extinguisher is placed outside, it is also likely to be damaged.

The utility model discloses a preassembled outdoor box-type transformer station comprising a box body, the top of the box body is fixedly provided with a mounting rack, the interior of the mounting rack is rotatably provided with a filter cylinder through a bearing, the surface of the filter cylinder is provided with filter holes, the interior of the filter cylinder is fixedly provided with a first rotating shaft, and the first rotating shaft is fixedly provided with a second rotating shaft. A connecting plate is rotatably arranged on the right side of the filter cartridge, an air inlet hole is formed in the surface of the connecting plate, a second rotating shaft is rotatably arranged in the connecting plate, a cleaning brush is fixedly arranged on the surface of the second rotating shaft, a fixing plate is fixedly arranged at the top of the box body, and the fixing plate is rotatably connected with the first rotating shaft. A driving assembly is arranged on the surface of the first rotating shaft, a cold air assembly is arranged on the top of the box body, a filtering device in a heat dissipation system can be cleaned, the situation that the heat dissipation effect on elements in a substation is affected due to the fact that dust blocks filtering holes is avoided, and meanwhile the heat dissipation system does not need to be stopped during cleaning.

The utility model discloses a cable safety supporting platform of a photovoltaic box transformer substation, which comprises a bottom plate used for supporting a photovoltaic box transformer substation main body, the bottom surface of the bottom plate is fixedly connected with four fixing columns, the outer surface of each fixing column is fixedly connected with a fixing plate, the upper surfaces of the four fixing plates are jointly and fixedly connected with a supporting plate, and the supporting plate is fixedly connected with the bottom surface of the bottom plate. A protective shell and a limiting plate are arranged on the upper surface of the supporting plate, the protective shell is used for containing a cable, one end of the cable sequentially and vertically penetrates through the protective shell and the bottom plate upwards to be connected with the photovoltaic box transformer substation body, and the other end of the cable horizontally penetrates through the protective shell to be supported on the limiting plate and clamped in a limiting groove of the limiting plate. According to the invention, the cable of the photovoltaic box transformer substation can be effectively fixed and supported, the cable is prevented from being blown by external strong wind to swing, the service life of the cable is prolonged, and the power supply safety is improved.