Coating-conductor-steel core composite structure type transmission conductor current-carrying capacity simulation evaluation system

Abstract

The invention provides a coating-conductor-steel core composite structure type power transmission conductor current-carrying capacity simulation evaluation system, belongs to the field of electric wire simulation evaluation, and solves the problems that efficient environment simulation cannot be performed on an electric wire coated with a coating, a current-carrying capacity simulation model cannot be established and the like. Comprising a wind speed simulation subsystem, a tension detection subsystem, a fixed experiment module and a mobile experiment module, a master control operation computer device is arranged on the outer side of the mobile experiment module, a sunlight simulation subsystem and a visual monitoring subsystem are arranged on the inner side of the mobile experiment module, and a cable temperature measurement subsystem and a temperature simulation subsystem are arranged in the mobile experiment module and the fixed experiment module. A rainfall simulation subsystem, a coating subsystem and eight cable clamping subsystems are arranged on the fixed experiment module, and a cable data subsystem, an analogue simulation subsystem, a current-carrying capacity calculation and evaluation subsystem and an early warning subsystem are arranged in the master control operation computer. According to the invention, environment simulation and simulation analysis can be carried out, and a conducting wire current-carrying capacity calculation simulation evaluation model coated with a coating is established.

Description

Technical Field

[0001] The invention belongs to the technical field of power transmission line simulation evaluation, and relates to a power transmission conductor current carrying capacity simulation evaluation system, in particular to a coating-conductor-steel core composite structure power transmission conductor current carrying capacity simulation evaluation system. Background Art

[0002] High-voltage transmission technology is an important part of the modern power system. It reduces energy loss during transmission by increasing the transmission voltage level, thereby improving transmission efficiency. With the continuous growth of electricity demand and the increasing scale of power grids, high-voltage transmission technology has been widely used. In the field of high-voltage transmission, DC transmission and AC transmission are the two main transmission methods, each of which has different characteristics and advantages.

[0003] In order to improve the performance of high-voltage transmission conductors, a four-split high-voltage transmission conductor with a composite structure of "coating-conductor-steel core" has been designed. As an innovative form of high-voltage transmission technology, it further improves the transmission efficiency and stability by optimizing the conductor structure and arrangement.

[0004] The existing transmission lines generally use a two-layer steel core aluminum stranded wire structure. There is already a simulation evaluation model for the current carrying capacity calculation of the existing transmission lines with this structure, but this model is not completely suitable for the current carrying capacity calculation of the transmission lines with coatings. Some parameters in the model, such as the surface radiation coefficient and heat absorption coefficient of the conductor, are related to the age of the conductor and the degree of surface contamination. The empirical values ​​are not accurate enough.

[0005] The cross-section of the transmission conductor with the composite structure of "coating-conductor-steel core" is refined and modeled, and the geometric structure and material properties of the composite structure transmission conductor are accurately described. When the conductor is running, the thermal conduction and heat dissipation characteristics of the coating jointly determine the temperature field distribution of the conductor, thereby affecting the current carrying capacity of the conductor. Therefore, the core of the current carrying capacity calculation simulation evaluation model of the transmission conductor based on the "coating-conductor-steel core" structure is to establish a new current carrying capacity simulation evaluation model after coating according to the physical properties of different coating materials, and derive the current carrying capacity simulation calculation formula after coating.

[0006] Based on this, we propose a coating-conductor-steel core composite structure transmission line current carrying capacity simulation evaluation system, which can perform environmental simulation and precise simulation analysis, derive the current carrying capacity simulation calculation formula after coating, and establish a transmission line current carrying capacity calculation simulation evaluation model based on the coating-conductor-steel core composite structure. Summary of the invention

[0007] The purpose of the present invention is to address the above-mentioned problems in the existing technology and propose a coating-conductor-steel core composite structure transmission line current carrying capacity simulation evaluation system. The technical problem to be solved by the invention is: how to realize environmental simulation and accurate simulation analysis, obtain the current carrying capacity simulation calculation formula after coating, and establish a transmission line current carrying capacity calculation simulation evaluation model based on the coating-conductor-steel core composite structure.

[0008] The purpose of the present invention can be achieved by the following technical solutions: A coating-conductor-steel core composite structure transmission line current carrying capacity simulation and evaluation system comprises a wind speed simulation subsystem, a tension detection subsystem, a fixed test cabin and a mobile test cabin opposite to the fixed test cabin, a main control operation computer is arranged on the outside of the mobile test cabin, a sunshine simulation subsystem and a visual monitoring subsystem are arranged on the inside of the mobile test cabin, a cable temperature measurement subsystem and a temperature simulation subsystem are arranged inside the mobile test cabin and the fixed test cabin, a precipitation simulation subsystem, a coating coating subsystem and eight cable clamping subsystems are arranged on the fixed test cabin, the precipitation simulation subsystem, the cable clamping subsystem and the coating coating subsystem are arranged in order from top to bottom, the temperature simulation subsystem is located on the side of the cable clamping subsystem, and a cable data subsystem, a simulation subsystem, a current carrying capacity calculation and evaluation subsystem and an early warning subsystem are arranged inside the main control operation computer.

[0009] The working principle of the present invention is as follows: the mobile test cabin is opened, the four-split high-voltage transmission wire to be evaluated is clamped on eight cable clamping subsystems, the tension detection subsystem detects the pulling of the four-split high-voltage transmission wire and records the tension at that time, the mobile test cabin is closed, the simulation subsystem controls the wind speed simulation subsystem to simulate the environmental wind speed, controls the sunshine simulation subsystem to simulate the sunshine intensity and sunshine direction, controls the temperature simulation subsystem to simulate the environmental temperature, and controls the precipitation simulation subsystem to simulate the environmental humidity; the cable temperature measurement subsystem monitors the temperature of the four-split high-voltage transmission wire at that time in real time; the outer diameter of the experimental cable and the age of the experimental cable are input through the main control operation computer component, the cable data subsystem is used to collect various performance data parameters, and the current carrying capacity calculation and evaluation subsystem monitors and evaluates the current carrying capacity of the high-voltage transmission wire without coating at that time in real time; The coating material and coating thickness are input through the main control computer, and the simulation subsystem controls the coating subsystem to coat the four-split high-voltage transmission wires and control the spraying thickness. The coating is dried through the cooperation of the temperature simulation subsystem, the wind speed simulation subsystem and the sunshine simulation subsystem. After drying, the tension detection subsystem detects and records the tension of the four-split high-voltage transmission wire at that time; then the simulation subsystem controls the wind speed simulation subsystem to simulate the ambient wind speed, controls the sunshine simulation subsystem to simulate the sunshine intensity and sunshine direction, controls the temperature simulation subsystem to simulate the ambient temperature, and controls the precipitation simulation subsystem to simulate the ambient humidity; The simulation subsystem controls the wind speed simulation subsystem to simulate the ambient wind speed, controls the sunshine simulation subsystem to simulate the sunshine intensity and sunshine direction, controls the temperature simulation subsystem to simulate the ambient temperature, and controls the precipitation simulation subsystem to simulate the ambient humidity; the cable temperature measurement subsystem monitors the temperature of the four-split high-voltage transmission wires in real time, the cable data subsystem is used to collect various performance data parameters, and the current carrying capacity calculation and evaluation subsystem monitors and evaluates the current carrying capacity of the high-voltage transmission wires after coating in real time; Then, the coating thickness is input through the main control computer, the coating is thickened, and the simulation subsystem controls the coating subsystem to coat the four-split high-voltage transmission wire and control the spraying thickness. The coating is dried through the cooperation of the temperature simulation subsystem, the wind speed simulation subsystem and the sunshine simulation subsystem. The tension detection subsystem detects and records the tension of the four-split high-voltage transmission wire at that time; the cable temperature measurement subsystem monitors the temperature of the four-split high-voltage transmission wire at that time in real time; the cable data subsystem is used to collect various performance data parameters; the current carrying capacity calculation and evaluation subsystem monitors and evaluates the current carrying capacity of the high-voltage transmission wire after coating in real time; The above experiment was repeated to obtain the relationship between current carrying capacity and coating thickness; Finally, the mobile test chamber is opened, and the four-split high-voltage transmission wires to be evaluated are removed from the eight cable clamping subsystems, and the same four-split high-voltage transmission wires to be evaluated are placed on top. Then the coating material is changed, and the above experiment is repeated to obtain the relationship between the current carrying capacity and the coating material. Then replace the four-split high-voltage transmission test cable with different materials, record the outer diameter of the test cable and the age of the test cable, repeat the above experiment, and obtain the relationship between the current carrying capacity of the four-split high-voltage transmission test cable and the coating thickness and coating material; The visual monitoring subsystem monitors the internal conditions of the fixed and mobile experimental cabins in real time; When the current carrying capacity of the high-voltage transmission line exceeds a preset threshold, the early warning subsystem automatically issues an early warning or alarm message and provides timely maintenance suggestions.

[0010] The mobile experimental cabin includes a mobile cabin wall and a U-shaped mobile cabin frame, a plurality of exhaust valves are arranged on the mobile cabin wall, an electric scissor-type adjustment frame and a flexible cover are arranged between the mobile cabin wall and the mobile cabin frame, the electric scissor-type adjustment frame is located on the outside of the flexible cover, the lower ends of the mobile cabin frame and the electric scissor-type adjustment frame are provided with moving wheels, a sealing protrusion is arranged on the outside of the mobile cabin frame, and two symmetrically arranged sealing telescopic rods are arranged between the mobile cabin frame and the mobile cabin wall; the main control operation computer component includes a main control operation box and a main control computer, the main control operation box and the main control computer are fixed on the outside of the mobile cabin wall, a switch button, a display screen with buttons and a flashing warning light are arranged on the main control operation box, and the main control computer is connected to the display screen with buttons by electric wires.

[0011] With the above structure, the electric scissor-type adjustment frame is unfolded, driving the mobile cabin frame to move, and then driving the flexible cover to unfold. The sealing telescopic rod and the sealing protrusion cooperate with the fixed experimental cabin to form a sealed space for the current carrying capacity simulation evaluation experiment. The moving wheel is used to move the electric scissor-type adjustment frame and the mobile cabin frame, and the exhaust valve is used to control the exhaust (heat exhaust); The switch button is used to control the start and stop of the device. The display screen with buttons shows that the system interface is concise and clear, easy to operate and use, and convenient for operation and maintenance personnel to quickly get started and obtain the required information. The flashing warning light is used for alarm flashing. The main control computer is convenient for operation and maintenance personnel to quickly get started and obtain the required information. The cable data subsystem, simulation subsystem, current carrying capacity calculation and evaluation subsystem and early warning subsystem are set inside the main control computer.

[0012] The fixed experimental cabin includes a fixed bulkhead, a sealing groove matching the shape specification of the sealing protrusion is provided on the inner side of the fixed bulkhead, a plurality of sealing tubes penetrating the fixed bulkhead are provided on the fixed bulkhead, a water receiving bottom box is provided at the inner lower end of the fixed bulkhead, a drainage pipe is provided on the water receiving bottom box, the drainage pipe passes through the fixed bulkhead, two sealing telescopic rods are engaged on both sides of the water receiving bottom box, two symmetrically arranged clamping brackets are fixed on the inner side of the fixed bulkhead, every four cable clamping subsystems are arranged on one clamping bracket, and the eight cable clamping subsystems are symmetrically arranged in pairs.

[0013] The above structure is adopted, and a sealing groove with a matching sealing protrusion shape specification is used. Two sealing telescopic rods are clamped on both sides of the water receiving bottom box to seal and form a sealed space. A current carrying capacity simulation evaluation experiment is carried out. Several sealing cylinders are used to seal the wiring and pipes. The water receiving bottom box is used to receive water and drain water through a drain pipe. Every four cable clamping subsystems are arranged on a clamping bracket, and the eight cable clamping subsystems are symmetrically arranged in pairs, which are used to clamp and energize four-split high-voltage transmission wires.

[0014] The sunlight simulation subsystem includes a plurality of explosion-proof temperature-controlled lamps and a plurality of light sensors. The explosion-proof temperature-controlled lamps are respectively fixed on the inner side of the mobile cabin frame and the inner side of the mobile cabin wall, and the light sensors are respectively fixed on the inner side of the mobile cabin frame and the inner side of the fixed cabin wall; the visual monitoring subsystem includes a plurality of visual cameras, which are respectively fixed on the inner side of the mobile cabin frame and the inner side of the mobile cabin wall; the cable temperature measurement subsystem includes a plurality of optical fiber temperature measurement sensors, which are respectively fixed on the inner side of the mobile cabin wall and the upper end of the water-connected bottom box.

[0015] The above structure is used to control the explosion-proof temperature-controlled lights at different positions to light up, simulate the intensity and direction of sunlight, and the light sensor detects the light intensity and provides effective feedback. Several visual cameras are used to monitor the internal conditions of fixed and mobile experimental cabins in real time. Several optical fiber temperature sensors are used to monitor the temperature of the experimental cables in real time and transmit the temperature data to the cable data subsystem.

[0016] The temperature simulation subsystem includes a cold air component, a hot air component, a ventilation box and several temperature sensors. The cold air component and the hot air component are located on the outside of the fixed bulkhead, the ventilation box is fixed on the inside of the fixed bulkhead, and the temperature sensors are arranged inside the mobile experimental cabin and the fixed experimental cabin; the cold air component includes a refrigeration box, a cold air fan is fixed on the outside of the refrigeration box, an air outlet is fixed on the inside of the refrigeration box, the air outlet is connected to one side of the ventilation box by a pipe, and the pipe between the air outlet and the ventilation box passes through a sealing tube at a corresponding position; the hot air component includes a hot air box, a hot air fan is fixed on the outside of the hot air box, the air outlet of the hot air box is connected to the other side of the ventilation box by a pipe, and the pipe between the air outlet of the hot air box and the ventilation box passes through a sealing tube at a corresponding position; the wind speed simulation subsystem consists of a cold air fan, a hot air fan, a ventilation box and several wind speed sensors, and the wind speed sensor is fixed on the inner side of the mobile cabin frame.

[0017] With the above structure, the cold air fan blows air, and cold air is obtained after passing through the refrigeration box. The cold air enters one side of the ventilation box through the air outlet, and is blown onto the four-split high-voltage transmission wire to be evaluated clamped on the eight cable clamping subsystems through the ventilation box, simulating the environmental cold air; the hot air fan blows air, and hot air is obtained after passing through the hot air box. The hot air enters the other side of the ventilation box, and is blown onto the four-split high-voltage transmission wire to be evaluated clamped on the eight cable clamping subsystems through the ventilation box, simulating the environmental hot air. The cold air fan, the hot air fan and the ventilation box cooperate to simulate the environmental wind speed, and the wind speed sensor monitors the environmental wind speed in real time.

[0018] The precipitation simulation subsystem includes a water injection box assembly, a precipitation simulation mechanism and a plurality of humidity sensors. The water injection box assembly is located on the outside of the fixed bulkhead, the precipitation simulation mechanism is arranged above the ventilation box, the water injection box assembly includes a water pump and a water tank, the water inlet end of the water pump and the water tank are connected by a pipe, the precipitation simulation mechanism includes a main water pipe, the water outlet end of the water pump and the main water pipe are connected by a pipe, the pipe between the water outlet end of the water pump and the main water pipe passes through a sealing cylinder at a corresponding position, a plurality of supports are fixed at the lower end of the main water pipe, the supports are fixed above the ventilation box, a plurality of drainage pipes are arranged on the side of the main water pipe, a plurality of precipitation nozzles are arranged at the lower end of the drainage pipe, and the humidity sensors are fixed inside the fixed experimental cabin and the mobile experimental cabin.

[0019] With the above structure, the water pump draws the clean water from the water tank and injects it into the main water pipe, and then drains the water through several drainage pipes and sprays it onto the four-split high-voltage transmission wires to be evaluated clamped by eight cable clamping subsystems through precipitation nozzles to simulate the ambient humidity and rainfall. The humidity sensor is used to detect the ambient humidity.

[0020] The coating coating subsystem comprises a coating feeding mechanism and a coating coating mechanism, wherein the coating feeding mechanism is located on the outside of the fixed bulkhead, the coating coating mechanism is arranged at the upper end of the water receiving bottom box, the coating feeding mechanism comprises an electromagnetic flow valve, a discharge pump, an electric control box and a heating box, a coating material tank is fixed at the upper end of the heating box, a curved heat exhaust pipe is arranged inside the coating material tank, the upper end of the heat exhaust pipe extends above the coating material tank, the lower end of the heat exhaust pipe extends to the side of the coating material tank, an exhaust fan connected thereto is arranged at the lower end of the heat exhaust pipe, the air inlet end of the exhaust fan is connected to the heating box, the feed end of the discharge pump is connected to the coating material tank through a pipeline, the discharge end of the discharge pump is connected to the electromagnetic flow valve through a pipeline, the electric control box is connected to the electromagnetic flow valve, the discharge pump, the heating box and the exhaust fan as well as the main control operation computer by electric wires; The coating coating mechanism includes a guide rail seat and a drag chain plate, which are fixed at the upper end of the water receiving bottom box, a rack is fixed on the side of the guide rail seat, a sliding seat is slidably provided on the guide rail seat, a cable drag chain is provided between the sliding seat and the drag chain plate, a moving motor and an electric lead screw are fixed on the sliding seat, a moving gear is fixed on the output shaft of the moving motor, the moving gear is meshed with the rack, a mechanical arm is provided on the electric lead screw for transmission, an electric arc clamping rod is provided at the end of the mechanical arm, two coating nozzles are provided on the clamping rod of the electric arc clamping rod, the coating nozzle is connected to the discharge end of the electromagnetic flow valve by a pipeline, the pipeline between the coating nozzle and the discharge end of the electromagnetic flow valve passes through the sealing cylinder at the corresponding position, and the cable drag chain is respectively connected to the electric lead screw, the mechanical arm, the electric arc clamping rod, the moving motor and the wires of the electric control box.

[0021] With the above structure, the coating material is placed inside the coating material tank, the heating box heats the coating material tank so that the coating material can be stably transported, the exhaust fan extracts the heat inside the heating box and discharges it through the curved heat exhaust pipe, the curved heat exhaust pipe keeps the coating material inside the coating material tank warm, the discharge pump injects the coating material into the electromagnetic flow valve, and the coating material is injected into the corresponding coating nozzle through the electromagnetic flow valve; The cable drag chain is used for routing, the output shaft of the mobile motor drives the mobile gear, the mobile gear meshes with the rack, drives the sliding seat to slide on the guide rail seat, thereby driving the coating nozzle to move, the electric lead screw drives the mechanical arm to move longitudinally, the mechanical arm drives the electric arc clamp rod to adjust the angle, so that the clamp rod of the electric arc clamp rod covers both sides of the four-split high-voltage transmission wire, and the coating nozzle is facing the four-split high-voltage transmission wire, and the four-split high-voltage transmission wire is coated.

[0022] The cable clamping mechanism includes a terminal block and an electric push rod, which are fixed on a clamping bracket at corresponding positions. The terminal block is provided with a terminal barrel, and a snap-on ring groove is provided on the outer side of the terminal barrel. A support frame is fixed on the rear side of the terminal block, and a connecting rod is slidably provided on the support frame. An articulated connecting rod is hinged between one end of the connecting rod and the terminal block, and a locking ring plate is provided at the other end of the connecting rod, which is positioned directly opposite to the terminal block. A conductive cable is provided between the locking ring plate and the connecting rod, and one end of the conductive cable extends into the terminal block and is electrically connected to the terminal barrel. The other end of the conductive cable passes through a sealing tube at a corresponding position, and the other end of the conductive cable is electrically connected to a main control operating computer component; a tension sensor is fixed on the telescopic end of the electric push rod, and a base is fixed on the tension sensor, a clamping assembly and a through-hole mounting plate are provided on the base, and a buckle assembly is provided on the through-hole mounting plate. The clamping assembly and the buckle assembly are both colinear with the axis of the terminal barrel, and the tension detection subsystem consists of an electric push rod, a tension sensor, a base and a clamping assembly.

[0023] With the above structure, the other end of the conductive cable is electrically connected to the main control operating computer component to detect experimental cable status information parameters such as voltage level and current size. The two ends of the four-split high-voltage transmission wire pass through the clamping assembly, through-hole mounting plate and buckle assembly at the corresponding positions respectively in turn. The clamping assembly clamps the ends of the four-split high-voltage transmission wires, and the telescopic end of the electric push rod is retracted to pull the tension sensor. The tension sensor pulls the base to move, thereby pulling the clamping assembly, the through-hole mounting plate and the buckle assembly, and inserting the bare wire at the end of the four-split high-voltage transmission wire into the wiring barrel, which is electrically connected to the wiring barrel, so that the conductive cable is connected to the four-split high-voltage transmission wire. The four-split high-voltage transmission wire is electrically connected to monitor the experimental cable status information parameters. The buckle assembly is buckled and locked inside the snap-in ring groove. The electric push rod, the tension sensor, the base and the clamping assembly cooperate to detect and record the tension of the four-split high-voltage transmission wire before and after coating when pulling the four-split high-voltage transmission wire; when removing the four-split high-voltage transmission wire, the buckle assembly is rotated to release the buckle lock of the buckle assembly on the snap-in ring groove, and the telescopic end of the electric push rod is extended to push out the clamping assembly, the through-hole mounting plate and the buckle assembly, thereby pulling the bare wire at the end of the four-split high-voltage transmission wire out of the wiring barrel and releasing the electrical connection with the wiring barrel.

[0024] The clamping assembly includes a fixed plate, a lifting push rod is fixed on the fixed plate, a connecting cross bar is fixed to the telescopic end of the lifting push rod, both ends of the connecting cross bar are hinged with hinged connecting rods, the hinged connecting rods are hinged on the fixed plate, the ends of the hinged connecting rods are hinged with arc clamping plates, and the inner side of the arc clamping plate is provided with an insulating and anti-slip layer; the buckle assembly includes a fixed cylinder, the fixed cylinder is fixed on the through-hole mounting plate, a plurality of circumferentially evenly distributed adjusting grooves are opened on the fixed cylinder, a rotating cylinder is provided for rotation inside the fixed cylinder, a plurality of circumferentially evenly distributed vertical rod seats are fixed on the rotating cylinder, the vertical rod seats are hinged with buckle claws, the ends of the buckle claws are threaded with adjusting screws, the adjusting screws correspond to the positions and numbers of the adjusting grooves, and the adjusting screws are directly opposite to the adjusting grooves at the corresponding positions.

[0025] With the above structure, the telescopic end of the lifting push rod drives the linkage cross bar to retract, pulls the two hinged connecting rods to rotate around the fixed plate, and the ends of the two hinged connecting rods are synchronously unfolded, thereby driving the arc clamping plates to be synchronously unfolded, and the four-split high-voltage transmission wires are placed between the arc clamping plates. The telescopic end of the lifting push rod drives the linkage cross bar to extend, pulls the two hinged connecting rods to rotate around the fixed plate, and the ends of the two hinged connecting rods are synchronously retracted, thereby driving the arc clamping plates to be synchronously retracted, so that the insulating anti-slip layer is clamped on the four-split high-voltage transmission wires; Manually rotate the rotating cylinder, and the rotating cylinder drives a number of circumferentially evenly distributed vertical rod seats to rotate, thereby driving the buckle claws to rotate synchronously, adjusting the threaded depth of the adjusting screw so that the end of the adjusting screw abuts against the fixed cylinder for clamping and locking, that is, the buckle claws are locked in the locking ring groove; when releasing the lock, manually rotate the rotating cylinder so that the end of the adjusting screw slides into the adjustment groove at the corresponding position, at which time the end of the buckle claw can be unfolded, releasing the buckle claws from locking in the locking ring groove.

[0026] The cable data subsystem is used to collect data including but not limited to ambient temperature, ambient humidity, ambient wind speed, sunshine intensity, sunshine direction, test cable temperature, test cable outer diameter, test cable age, test cable stress, coating material and coating thickness; The simulation subsystem uses simulation technology and algorithms to simulate the operating environment parameters and coating parameters of high-voltage transmission lines under various working conditions, including but not limited to the influence of external factors such as ambient temperature, ambient humidity and ambient wind speed, as well as the influence of coating materials and coating thickness, and predicts the current carrying capacity and performance of the conductor by accurately modeling and simulating the physical characteristics and operating status of the conductor; The current carrying capacity calculation and evaluation subsystem monitors and evaluates the current carrying capacity of high-voltage transmission lines in real time, establishes a current carrying capacity calculation simulation evaluation model for transmission lines based on a coating-conductor-steel core composite structure, and uses coating parameters as variables to simulate and evaluate the relationship between coating parameters and current carrying capacity and experimental cable temperature, while keeping the simulated operating environment parameters and experimental cable basic parameters the same. The influencing factors of the current carrying capacity of the transmission line of the coating-conductor-steel core composite structure are analyzed, and the current carrying capacity simulation calculation formula after coating is obtained, providing accurate evaluation results and early warning information, helping operation and maintenance personnel to promptly discover and deal with potential problems; Simulate operating environment parameters: ambient temperature, ambient humidity, ambient wind speed, sunshine intensity and sunshine direction, etc.; Basic parameters of the experimental cable: outer diameter of the experimental cable, the age of the experimental cable, resistance per unit length of the experimental cable, stress of the experimental cable, voltage level, current size, etc.; Coating parameters: coating material and coating thickness, etc.

[0027] Use the controlled variable method: by keeping several parameters unchanged and changing only one of the variables, observe and analyze the impact of the variable on the result or phenomenon.

[0028] The following is a simulation evaluation of the current carrying capacity of the relationship between coating parameters and current carrying capacity (as well as the temperature of the experimental cable) with coating parameters as variables, assuming that the simulated operating environment parameters and the basic parameters of the experimental cable remain the same.

[0029] When the current carrying capacity of the high-voltage transmission line exceeds a preset threshold, the early warning subsystem automatically issues an early warning or alarm message to remind the operation and maintenance personnel to take timely measures to deal with it, and provide timely maintenance suggestions to ensure the safe and stable operation of the power system.

[0030] Compared with the existing technology, the coating-conductor-steel core composite structure transmission line current carrying capacity simulation evaluation system has the following advantages: Through the coordination of mobile test cabin and fixed test cabin, simulate the monitoring test cabin and simulate the operating environment; Through the cooperation of eight cable clamping subsystems, the four-split high-voltage transmission wires can be stably clamped and the voltage and current can be controlled to simulate power-on. The tension detection subsystem detects and records the tension of the four-split high-voltage transmission wires before and after coating. The sunshine simulation subsystem simulates sunshine intensity and sunshine direction, the temperature simulation subsystem simulates ambient temperature, the precipitation control simulation subsystem simulates ambient humidity, and the wind speed simulation subsystem simulates ambient wind speed to simulate the actual operating environment; The visual monitoring subsystem is used to monitor the internal conditions of the fixed and mobile test chambers in real time; the cable temperature measurement subsystem monitors the temperature of the four-split high-voltage transmission wires in real time; The cable data subsystem is used to collect various performance data parameters. The simulation subsystem uses simulation technology and algorithms to simulate the operating environment parameters and coating parameters of high-voltage transmission lines under various working conditions. By accurately modeling and simulating the physical characteristics and operating status of the conductors, the current carrying capacity and performance of the conductors are predicted. The current carrying capacity calculation and evaluation subsystem monitors and evaluates the current carrying capacity of the high-voltage transmission conductors after coating in real time, using the control variable method: by keeping several parameters unchanged and only changing one of the variables, the influence of the variable on the result or phenomenon is observed and analyzed, that is, the coating parameters are used as variables to simulate and evaluate the relationship between the coating parameters and the current carrying capacity (as well as the temperature of the experimental cable) when the simulated operating environment parameters and the basic parameters of the experimental cable are kept the same. When the current carrying capacity of the high-voltage transmission conductor exceeds the preset threshold, the early warning subsystem automatically issues an early warning or alarm message and provides timely maintenance suggestions. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the present invention when it is closed.

[0032] Figure 2 It is a schematic diagram of the structure of the present invention when it is unfolded.

[0033] Figure 3 It is a structural schematic diagram of the mobile experimental cabin in the present invention.

[0034] Figure 4 It is a structural schematic diagram of the fixed experimental cabin in the present invention.

[0035] Figure 5 It is a schematic diagram of the right side three-dimensional structure of the cable clamping mechanism in the present invention.

[0036] Figure 6 It is a schematic diagram of the left three-dimensional structure of the cable clamping mechanism in the present invention.

[0037] Figure 7 It is a three-dimensional structural schematic diagram of some components of the cable clamping mechanism in the present invention.

[0038] Figure 8 It is a structural schematic diagram of the coating application mechanism in the present invention.

[0039] Fig. 9 yes Figure 8 Schematic diagram of the enlarged structure at point A in the middle.

[0040] Fig.10 It is a structural schematic diagram of the water injection box assembly and the precipitation simulation mechanism in the present invention.

[0041] Fig.11 It is a structural schematic diagram of the coating feeding mechanism in the present invention.

[0042] Fig.12 It is a system block diagram of the present invention.

[0043] Fig.13 It is a comparative experimental table of coating material 1 of the present invention.

[0044] Fig.14 It is a comparative experimental table of coating material 2 of the present invention.

[0045] In the figure, 1. Mobile test cabin; 2. Main control computer; 3. Fixed test cabin; 4. Cold air assembly; 5. Coating feeding mechanism; 6. Water filling box assembly; 7. Hot air assembly; 8. Explosion-proof temperature control lamp; 9. Sealing protrusion; 10. Visual camera; 11. Optical fiber temperature sensor; 12. Moving wheel; 13. Electric scissor-type adjustment frame; 14. Flexible cover; 15. Mobile cabin frame; 16. Fixed cabin wall; 17. Sealing groove; 18. Ventilation box; 19. Sealing cylinder; 20. , clamping bracket; 21, cable clamping mechanism; 22, coating coating mechanism; 23, precipitation simulation mechanism; 24, water connection bottom box; 25, wiring barrel; 26, snap ring groove; 27, wiring seat; 28, hinged connecting rod; 29, connecting rod; 30, support frame; 31, locking ring plate; 32, electric push rod; 33, tension sensor; 34, base; 35, clamping assembly; 36, through-hole mounting plate; 37, buckle assembly; 38, buckle claw; 39, adjusting screw; 4 0. Pole seat; 41. Adjustment slot; 42. Rotating cylinder; 43. Fixed cylinder; 44. Fixed plate; 45. Lifting push rod; 46. Locking screw; 47. Linking cross bar; 48. Articulated connecting rod; 49. Arc clamping plate; 50. Insulation anti-skid layer; 51. Cable drag chain; 52. Guide rail seat; 53. Rack; 54. Sliding seat; 55. Electric screw; 56. Mechanical arm; 57. Electric arc clamping rod; 58. Coating nozzle; 59. Mobile motor; 60. Water pump; 61. Water tank; 62. Main water pipe; 63. Support; 64. Drain pipe; 65. Precipitation nozzle; 66. Electromagnetic flow valve; 67. Discharge pump; 68. Coating material tank; 69. Heat exhaust pipe; 70. Electric control box; 71. Heating box; 72. Exhaust fan; 73. Switch button; 74. Display screen with button; 75. Flashing warning light; 76. Main control computer; 77. Cold air fan; 78. Refrigeration box; 79. Air outlet tube; 80. Hot air box; 81. Hot air fan. DETAILED DESCRIPTION

[0046] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0047] like Figure 1-Figure 12As shown, the coating-conductor-steel core composite structure transmission line current carrying capacity simulation and evaluation system comprises a wind speed simulation subsystem, a tension detection subsystem, a fixed test cabin 3 and a mobile test cabin 1 facing the fixed test cabin 3, a main control operation computer component 2 is arranged on the outside of the mobile test cabin 1, a sunshine simulation subsystem and a visual monitoring subsystem are arranged on the inside of the mobile test cabin 1, a cable temperature measurement subsystem and a temperature simulation subsystem are arranged inside the mobile test cabin 1 and the fixed test cabin 3, a precipitation simulation subsystem, a coating coating subsystem and eight cable clamping subsystems are arranged on the fixed test cabin 3, the precipitation simulation subsystem, the cable clamping subsystem and the coating coating subsystem are arranged in order from top to bottom, the temperature simulation subsystem is located on the side of the cable clamping subsystem, and a cable data subsystem, a simulation subsystem, a current carrying capacity calculation and evaluation subsystem and an early warning subsystem are arranged inside the main control operation computer component 2.

[0048] The mobile test cabin 1 is opened, and the four-split high-voltage transmission wire to be evaluated is clamped on the eight cable clamping subsystems. The tension detection subsystem detects the pulling of the four-split high-voltage transmission wire and records the tension at that time. The mobile test cabin 1 is closed, and the simulation subsystem controls the wind speed simulation subsystem to simulate the ambient wind speed, controls the sunshine simulation subsystem to simulate the sunshine intensity and sunshine direction, controls the temperature simulation subsystem to simulate the ambient temperature, and controls the precipitation simulation subsystem to simulate the ambient humidity; the cable temperature measurement subsystem monitors the temperature of the four-split high-voltage transmission wire in real time; the outer diameter of the experimental cable and the age of the experimental cable are input through the main control operation computer 2, the cable data subsystem is used to collect various performance data parameters, and the current carrying capacity calculation and evaluation subsystem monitors and evaluates the current carrying capacity of the high-voltage transmission wire without coating in real time; The coating material and coating thickness are input through the main control computer 2, and the simulation subsystem controls the coating subsystem to coat the four-split high-voltage transmission wire and control the spraying thickness, and the coating is dried through the cooperation of the temperature simulation subsystem, the wind speed simulation subsystem and the sunshine simulation subsystem; After drying, the tension detection subsystem detects and records the tension of the four-split high-voltage transmission wire at that time; then the simulation subsystem controls the wind speed simulation subsystem to simulate the ambient wind speed, controls the sunshine simulation subsystem to simulate the sunshine intensity and sunshine direction, controls the temperature simulation subsystem to simulate the ambient temperature, and controls the precipitation simulation subsystem to simulate the ambient humidity; The simulation subsystem controls the wind speed simulation subsystem to simulate the ambient wind speed, controls the sunshine simulation subsystem to simulate the sunshine intensity and sunshine direction, controls the temperature simulation subsystem to simulate the ambient temperature, and controls the precipitation simulation subsystem to simulate the ambient humidity; the cable temperature measurement subsystem monitors the temperature of the four-split high-voltage transmission wires in real time, the cable data subsystem is used to collect various performance data parameters, and the current carrying capacity calculation and evaluation subsystem monitors and evaluates the current carrying capacity of the high-voltage transmission wires after coating in real time; Then, the coating thickness is input through the main control computer 2 to thicken the coating. The simulation subsystem controls the coating subsystem to coat the four-split high-voltage transmission wires and controls the spraying thickness. The coating is dried through the cooperation of the temperature simulation subsystem, the wind speed simulation subsystem and the sunshine simulation subsystem. The tension detection subsystem detects and records the tension of the four-split high-voltage transmission wire at that time; the cable temperature measurement subsystem monitors the temperature of the four-split high-voltage transmission wire at that time in real time; the cable data subsystem is used to collect various performance data parameters; the current carrying capacity calculation and evaluation subsystem monitors and evaluates the current carrying capacity of the high-voltage transmission wire after coating in real time; The above experiment was repeated to obtain the relationship between current carrying capacity and coating thickness; Finally, the mobile test chamber 1 is opened, and the four-split high-voltage transmission wire after evaluation is removed from the eight cable clamping subsystems, and the same four-split high-voltage transmission wire to be evaluated is placed on it, and then the coating material is changed, and the above experiment is repeated to obtain the relationship between the current carrying capacity and the coating material; Then replace the four-split high-voltage transmission test cable with different materials, record the outer diameter of the test cable and the age of the test cable, repeat the above experiment, and obtain the relationship between the current carrying capacity of the four-split high-voltage transmission test cable and the coating thickness and coating material; The visual monitoring subsystem monitors the internal conditions of the fixed experimental cabin 3 and the mobile experimental cabin 1 in real time; When the current carrying capacity of the high-voltage transmission line exceeds the preset threshold, the early warning subsystem automatically issues a warning or alarm message and provides timely maintenance suggestions.

[0049] The mobile experimental cabin 1 includes a mobile cabin wall and a U-shaped mobile cabin frame 15, a plurality of exhaust valves are arranged on the mobile cabin wall, an electric scissor-type adjustment frame 13 and a flexible cover 14 are arranged between the mobile cabin wall and the mobile cabin frame 15, the electric scissor-type adjustment frame 13 is located on the outside of the flexible cover 14, the lower ends of the mobile cabin frame 15 and the electric scissor-type adjustment frame 13 are both provided with moving wheels 12, a sealing protrusion 9 is arranged on the outside of the mobile cabin frame 15, and two symmetrically arranged sealing telescopic rods are arranged between the mobile cabin frame 15 and the mobile cabin wall; the main control operation computer component 2 includes a main control operation box and a main control computer 76, the main control operation box and the main control computer 76 are fixed on the outside of the mobile cabin wall, a switch button 73, a display screen with buttons 74 and a flashing warning light 75 are arranged on the main control operation box, and the main control computer 76 is connected to the display screen with buttons 74 by electric wires.

[0050] The electric scissor-type adjustment frame 13 is unfolded, driving the movable cabin frame 15 to move, and then driving the flexible cover 14 to unfold. The sealing telescopic rod and the sealing protrusion 9 cooperate with the fixed experimental cabin 3 to form a sealed space to carry out the current carrying capacity simulation evaluation experiment. The moving wheel 12 is used to move the electric scissor-type adjustment frame 13 and the movable cabin frame 15. The exhaust valve is used to control the exhaust (heat exhaust); The switch button 73 is used to control the start and stop of the device. The button display screen 74 shows that the system interface is concise and clear, easy to operate and use, and convenient for operation and maintenance personnel to quickly get started and obtain required information. The flashing warning light 75 is used for alarm flashing. The main control computer 76 is convenient for operation and maintenance personnel to quickly get started and obtain required information. The cable data subsystem, simulation subsystem, current carrying capacity calculation and evaluation subsystem and early warning subsystem are arranged inside the main control computer 76.

[0051] The fixed experimental cabin 3 includes a fixed bulkhead 16, the inner side of which is provided with a sealing groove 17 matching the shape and specification of the sealing protrusion 9, the fixed bulkhead 16 is provided with a plurality of sealing tubes 19 penetrating the fixed bulkhead 16, the inner lower end of the fixed bulkhead 16 is provided with a water receiving bottom box 24, the water receiving bottom box 24 is provided with a drainage pipe, the drainage pipe passes through the fixed bulkhead 16, two sealing telescopic rods are engaged on both sides of the water receiving bottom box 24, and two symmetrically arranged clamping brackets 20 are fixed to the inner side of the fixed bulkhead 16, every four cable clamping subsystems are arranged on one clamping bracket 20, and the eight cable clamping subsystems are symmetrically arranged in pairs.

[0052] The sealing protrusion 9 has a sealing groove 17 that matches the shape and specifications. Two sealing telescopic rods are engaged on both sides of the water receiving bottom box 24 to seal and form a sealed space for conducting a current carrying capacity simulation evaluation experiment. Several sealing cylinders 19 are used to seal the wiring and pipes. The water receiving bottom box 24 is used to receive water and drain water through a drain pipe. Every four cable clamping subsystems are arranged on a clamping bracket 20, and the eight cable clamping subsystems are symmetrically arranged in pairs to clamp and energize four-split high-voltage transmission wires.

[0053] The sunlight simulation subsystem includes a plurality of explosion-proof temperature-controlled lamps 8 and a plurality of light sensors. The explosion-proof temperature-controlled lamps 8 are respectively fixed on the inner side of the movable cabin frame 15 and the inner side of the movable cabin wall. The light sensors are respectively fixed on the inner side of the movable cabin frame 15 and the inner side of the fixed cabin wall 16. The visual monitoring subsystem includes a plurality of visual cameras 10. The visual cameras 10 are respectively fixed on the inner side of the movable cabin frame 15 and the inner side of the movable cabin wall. The cable temperature measurement subsystem includes a plurality of optical fiber temperature measurement sensors 11. The optical fiber temperature measurement sensors 11 are respectively fixed on the inner side of the movable cabin wall and the upper end of the water receiving bottom box 24.

[0054] The explosion-proof temperature-controlled lamps 8 at different positions are controlled to light up. Several explosion-proof temperature-controlled lamps 8 cooperate to simulate the intensity and direction of sunlight. The light sensor detects the light intensity and provides effective feedback. Several visual cameras 10 cooperate to monitor the internal conditions of the fixed experimental cabin 3 and the mobile experimental cabin 1 in real time. Several optical fiber temperature sensors 11 are used to monitor the temperature of the experimental cables in real time and transmit the temperature data to the cable data subsystem.

[0055] The temperature simulation subsystem includes a cold air component 4, a hot air component 7, a ventilation box 18 and a plurality of temperature sensors. The cold air component 4 and the hot air component 7 are located on the outside of the fixed bulkhead 16, the ventilation box 18 is fixed on the inside of the fixed bulkhead 16, and the temperature sensors are arranged inside the mobile experimental cabin 1 and the fixed experimental cabin 3; the cold air component 4 includes a refrigeration box 78, a cold air fan 77 is fixed on the outside of the refrigeration box 78, an air outlet 79 is fixed on the inside of the refrigeration box 78, and the air outlet 79 is connected to one side of the ventilation box 18 through a pipeline. The pipe between 79 and the ventilation box 18 passes through the sealing tube 19 at the corresponding position, the hot air assembly 7 includes a hot air box 80, a hot air fan 81 is fixed to the outside of the hot air box 80, the air outlet of the hot air box 80 is connected to the other side of the ventilation box 18 through a pipe, the pipe between the air outlet of the hot air box 80 and the ventilation box 18 passes through the sealing tube 19 at the corresponding position, the wind speed simulation subsystem is composed of a cold air fan 77, a hot air fan 81 and the ventilation box 18 and a plurality of wind speed sensors, and the wind speed sensors are fixed on the inner side of the movable cabin frame 15.

[0056] The cold air fan 77 blows air, and obtains cold air after passing through the refrigeration box 78. The cold air enters one side of the ventilation box 18 through the air outlet 79, and is blown onto the four-split high-voltage transmission wire to be evaluated clamped on the eight cable clamping subsystems through the ventilation box 18, simulating environmental cold air; the hot air fan 81 blows air, and obtains hot air after passing through the hot air box 80. The hot air enters the other side of the ventilation box 18, and is blown onto the four-split high-voltage transmission wire to be evaluated clamped on the eight cable clamping subsystems through the ventilation box 18, simulating environmental hot air. The cold air fan 77, the hot air fan 81 and the ventilation box 18 cooperate to simulate the environmental wind speed, and the wind speed sensor monitors the environmental wind speed in real time.

[0057] The precipitation simulation subsystem includes a water injection tank assembly 6, a precipitation simulation mechanism 23 and a plurality of humidity sensors. The water injection tank assembly 6 is located on the outside of the fixed bulkhead 16, and the precipitation simulation mechanism 23 is arranged above the ventilation box 18. The water injection tank assembly 6 includes a water pump 60 and a water tank 61. The water inlet end of the water pump 60 and the water tank 61 are connected by a pipeline. The precipitation simulation mechanism 23 includes a main water pipe 62. The water outlet end of the water pump 60 and the main water pipe 62 are connected by a pipeline. The pipeline between the water outlet end of the water pump 60 and the main water pipe 62 passes through the sealing tube 19 at the corresponding position. A plurality of supports 63 are fixed at the lower end of the main water pipe 62, and the supports 63 are fixed above the ventilation box 18. A plurality of drainage pipes 64 are provided on the side of the main water pipe 62, and a plurality of precipitation nozzles 65 are provided at the lower end of the drainage pipe 64. The humidity sensors are fixed inside the fixed experimental cabin 3 and the mobile experimental cabin 1.

[0058] The water pump 60 draws clean water from the water tank 61 and injects it into the main water pipe 62, which is then drained through a number of drainage pipes 64 and sprayed onto the four-split high-voltage transmission lines to be evaluated clamped by eight cable clamping subsystems through precipitation nozzles 65 to simulate environmental humidity and rainfall. The humidity sensor is used to detect the environmental humidity.

[0059] The coating subsystem includes a coating feeding mechanism 5 and a coating coating mechanism 22. The coating feeding mechanism 5 is located outside the fixed bulkhead 16. The coating coating mechanism 22 is arranged at the upper end of the water receiving bottom box 24. The coating feeding mechanism 5 includes an electromagnetic flow valve 66, a discharge pump 67, an electric control box 70 and a heating box 71. A coating material tank 68 is fixed at the upper end of the heating box 71. A curved heat exhaust pipe 69 is arranged inside the coating material tank 68. The upper end of the heat exhaust pipe 69 extends out of the upper end of the coating material tank 68. The lower end of the heat exhaust pipe 69 extends out of the side of the coating material tank 68, and the lower end of the heat exhaust pipe 69 is provided with an exhaust fan 72 connected thereto, and the air inlet end of the exhaust fan 72 is connected to the heating box 71, and the feed end of the discharge pump 67 is connected to the coating material tank 68 through a pipeline, and the discharge end of the discharge pump 67 is connected to the electromagnetic flow valve 66 through a pipeline, and the electric control box 70 is connected to the electromagnetic flow valve 66, the discharge pump 67, the heating box 71, the exhaust fan 72 and the main control operation computer component 2 by electric wires; The coating coating mechanism 22 includes a guide rail seat 52 and a drag chain plate, which are fixed to the upper end of the water receiving bottom box 24. A rack 53 is fixed to the side of the guide rail seat 52. A sliding seat 54 is slidably provided on the guide rail seat 52. A cable drag chain 51 is provided between the sliding seat 54 and the drag chain plate. A moving motor 59 and an electric screw 55 are fixed to the sliding seat 54. A moving gear is fixed to the output shaft of the moving motor 59. The moving gear is meshed with the rack 53. The electric screw 55 is provided with a mechanical transmission. A mechanical arm 56 is provided with an electric arc clamping rod 57 at the end thereof, and two coating nozzles 58 are provided on the clamping rod of the electric arc clamping rod 57. The coating nozzle 58 is connected to the discharge end of the electromagnetic flow valve 66 through a pipeline. The pipeline between the coating nozzle 58 and the discharge end of the electromagnetic flow valve 66 passes through a sealing cylinder 19 at a corresponding position. The cable drag chain 51 is respectively connected with the electric lead screw 55, the mechanical arm 56, the electric arc clamping rod 57, the moving motor 59 and the electric control box 70 by electric wires.

[0060] The coating material is placed inside the coating material tank 68, and the heating box 71 heats the coating material tank 68 so that the coating material can be stably transported. The exhaust fan 72 extracts the heat inside the heating box 71 and discharges it through the curved heat exhaust pipe 69. The curved heat exhaust pipe 69 keeps the coating material inside the coating material tank 68 warm. The discharge pump 67 injects the coating material into the electromagnetic flow valve 66, and the coating material is injected into the corresponding coating nozzle 58 through the electromagnetic flow valve 66. The cable drag chain 51 is used for routing, the output shaft of the mobile motor 59 drives the mobile gear, the mobile gear engages with the rack 53, drives the sliding seat 54 to slide on the guide rail seat 52, thereby driving the coating nozzle 58 to move, the electric lead screw 55 drives the mechanical arm 56 to move longitudinally, and the mechanical arm 56 drives the electric arc clamping rod 57 to adjust the angle, so that the clamping rod of the electric arc clamping rod 57 is covered on both sides of the four-split high-voltage transmission wire, and the coating nozzle 58 is facing the four-split high-voltage transmission wire, and the four-split high-voltage transmission wire is coated.

[0061] The cable clamping mechanism 21 includes a terminal block 27 and an electric push rod 32, which are fixed on the clamping bracket 20 at corresponding positions. The terminal block 27 is provided with a terminal barrel 25, and a clamping ring groove 26 is provided on the outer side of the terminal barrel 25. A support frame 30 is fixed to the rear side of the terminal block 27, and a connecting rod 29 is slidably provided on the support frame 30. A hinged connecting rod 28 is hinged between one end of the connecting rod 29 and the terminal block 27, and a locking ring plate 31 is provided at the other end of the connecting rod 29, which is located opposite to the terminal block 27. A conductive cable is provided between the locking ring plate 31 and the connecting rod 29, and one end of the conductive cable extends into the terminal block 27 is inside and the conductive cable is electrically connected to the terminal barrel 25, the other end of the conductive cable passes through the sealing barrel 19 at the corresponding position, and the other end of the conductive cable is electrically connected to the main control operating computer component 2; a tension sensor 33 is fixed to the telescopic end of the electric push rod 32, a base 34 is fixed on the tension sensor 33, a clamping assembly 35 and a through-hole mounting plate 36 are provided on the base 34, a snap-on assembly 37 is provided on the through-hole mounting plate 36, the clamping assembly 35 and the snap-on assembly 37 are both colinear with the axis of the terminal barrel 25, and the tension detection subsystem is composed of the electric push rod 32, the tension sensor 33, the base 34 and the clamping assembly 35.

[0062] The other end of the conductive cable is electrically connected to the main control computer 2, which is used to detect the voltage level, current size and other experimental cable status information parameters. The two ends of the four-split high-voltage transmission wire pass through the clamping assembly 35, the through-hole mounting plate 36 and the buckle assembly 37 at the corresponding positions respectively in turn. The clamping assembly 35 clamps the end of the four-split high-voltage transmission wire, and the telescopic end of the electric push rod 32 is retracted to pull the tension sensor 33. The tension sensor 33 pulls the base 34 to move, thereby pulling the clamping assembly 35, the through-hole mounting plate 36 and the buckle assembly 37, and inserting the bare wire at the end of the four-split high-voltage transmission wire into the wiring barrel 25, and electrically connecting the wiring barrel 25, so that the conductive cable is connected to the four-split high-voltage transmission wire. The wires are electrically connected and used to monitor the state information parameters of the experimental cable. The buckle assembly 37 is buckled and locked inside the snap ring groove 26. The electric push rod 32, the tension sensor 33, the base 34 and the clamping assembly 35 cooperate to detect and record the tension of the four-split high-voltage transmission wire before and after coating when pulling the four-split high-voltage transmission wire; when removing the four-split high-voltage transmission wire, the buckle assembly 37 is rotated to release the buckle assembly 37 from the snap ring groove 26, and the telescopic end of the electric push rod 32 is extended, that is, the clamping assembly 35, the through-hole mounting plate 36 and the buckle assembly 37 are pushed out, thereby pulling the bare wire at the end of the four-split high-voltage transmission wire out of the wiring barrel 25, and releasing the electrical connection with the wiring barrel 25.

[0063] The clamping assembly 35 includes a fixed plate 44, a lifting push rod 45 is fixed on the fixed plate 44, a linkage cross bar 47 is fixed to the telescopic end of the lifting push rod 45, both ends of the linkage cross bar 47 are hinged with hinged connecting rods 48, the hinged connecting rod 48 is hinged on the fixed plate 44, and the end of the hinged connecting rod 48 is hinged with an arc clamping plate 49, and the inner side of the arc clamping plate 49 is provided with an insulating anti-slip layer 50; the buckle assembly 37 includes a fixed cylinder 43, the fixed cylinder 43 is fixed It is fixed on the through-hole mounting plate 36, and a plurality of circumferentially evenly distributed adjusting grooves 41 are provided on the fixed cylinder 43. A rotating cylinder 42 is rotatably provided inside the fixed cylinder 43, and a plurality of circumferentially evenly distributed vertical rod seats 40 are fixed on the rotating cylinder 42. The vertical rod seats 40 are all hinged with claws 38, and the ends of the claws 38 are threaded with adjusting screws 39. The positions and numbers of the adjusting screws 39 correspond to the adjusting grooves 41, and the adjusting screws 39 are directly opposite to the adjusting grooves 41 at the corresponding positions.

[0064] The telescopic end of the lifting push rod 45 drives the linkage cross bar 47 to retract, pulls the two hinged links 48 to rotate around the fixed plate 44, and the ends of the two hinged links 48 are synchronously unfolded, thereby driving the arc clamping plates 49 to be synchronously unfolded, and the four-split high-voltage transmission wires are placed between the arc clamping plates 49. The telescopic end of the lifting push rod 45 drives the linkage cross bar 47 to extend, pulls the two hinged links 48 to rotate around the fixed plate 44, and the ends of the two hinged links 48 are synchronously retracted, thereby driving the arc clamping plates 49 to be synchronously retracted, so that the insulating anti-slip layer 50 is clamped on the four-split high-voltage transmission wires; The rotating cylinder 42 is manually rotated, and the rotating cylinder 42 drives a number of circumferentially evenly distributed vertical rod seats 40 to rotate, thereby driving the clasp 38 to rotate synchronously, and adjusting the threaded depth of the adjusting screw 39, so that the end of the adjusting screw 39 abuts against the fixed cylinder 43 for clamping and locking, that is, the clasp 38 is locked in the locking ring groove 26; when releasing the lock, the rotating cylinder 42 is manually rotated, so that the end of the adjusting screw 39 slides into the adjusting groove 41 at the corresponding position, and the end of the clasp 38 can be unfolded at this time, and the clasp 38 is released from the locking ring groove 26.

[0065] The length, width and other dimensions of the mobile test cabin 1 and the fixed test cabin 3 of the present invention, the dimensions of other hardware equipment, and the number of other electrical components can all be customized according to actual experimental requirements to ensure that the simulation conditions of the current carrying capacity simulation evaluation within a unit volume (or unit length) are consistent.

[0066] The cable data subsystem is used to collect data including but not limited to ambient temperature, ambient humidity, ambient wind speed, sunshine intensity, sunshine direction, test cable temperature, test cable outer diameter, test cable age, test cable stress, coating material and coating thickness; The simulation subsystem uses simulation technology and algorithms to simulate the operating environment parameters and coating parameters of high-voltage transmission lines under various working conditions, including but not limited to the influence of external factors such as ambient temperature, ambient humidity and ambient wind speed, as well as the influence of coating materials and coating thickness. It predicts the current carrying capacity and performance of the conductor by accurately modeling and simulating the physical characteristics and operating status of the conductor. The current carrying capacity calculation and evaluation subsystem monitors and evaluates the current carrying capacity of high-voltage transmission lines in real time, establishes a current carrying capacity calculation simulation evaluation model for transmission lines based on the coating-conductor-steel core composite structure, analyzes the factors affecting the current carrying capacity of transmission lines with the coating-conductor-steel core composite structure, and provides accurate evaluation results and early warning information to help operation and maintenance personnel discover and deal with potential problems in a timely manner; Simulate operating environment parameters: ambient temperature, ambient humidity, ambient wind speed, sunshine intensity and sunshine direction, etc.; Basic parameters of the experimental cable: outer diameter of the experimental cable, the age of the experimental cable, resistance per unit length of the experimental cable, stress of the experimental cable, voltage level, current size, etc.; Coating parameters: coating material and coating thickness, etc.

[0067] Use the controlled variable method: by keeping several parameters unchanged and changing only one of the variables, observe and analyze the impact of the variable on the result or phenomenon.

[0068] The following is a simulation evaluation of the current carrying capacity of the relationship between coating parameters and current carrying capacity (as well as the temperature of the experimental cable) with coating parameters as variables, assuming that the simulated operating environment parameters and the basic parameters of the experimental cable remain the same.

[0069] There are two types of coating materials: coating material one, including component A and component B, wherein component A is mainly composed of one or more of polyols, isocyanates, isocyanate prepolymers and isocyanate modifiers, and component B is mainly composed of polyether, porous metal oxide powder filler and room temperature vulcanized silicone rubber. Component A and component B are stored separately and mixed when used to obtain wire insulation coating.

[0070] Coating material 2 is composed of the following raw materials in parts by mass: 13 parts of manganese zinc ferrite nanoparticles, 33 parts of terminal hydroxy dimethyl polysiloxane, 15 parts of nano silicon dioxide, 11 parts of silicon nitride, 5 parts of mica powder, 15 parts of polyethylene resin, 60 parts of dihydroxy tetra-active hydrogen unsaturated siloxane, 10 parts of isocyanate, and 10 parts of fatty acid ester; The main production steps are as follows: including the following steps: S1, adding manganese zinc ferrite nanoparticles into a grinder, and adding 5%-25% oleic acid for mixed grinding, drying the residual liquid of the product after grinding, and collecting it by adsorption with a magnetic material to obtain manganese zinc ferrite nanopowder after drying; S2, adding terminal hydroxy dimethyl polysiloxane, nano silicon dioxide, silicon nitride, and mica powder into a mixer, mixing and stirring, and filtering to obtain a first mixed material; S3, after the mixer is rinsed and dried, polyethylene resin, dihydroxy tetra-active hydrogen unsaturated siloxane, isocyanic acid and fatty acid ester are added to the mixer for mixing reaction, the reaction time is 100-160min, the reaction temperature is 50-70°C, and the second mixture is obtained; S4, re-weighing and proportioning the manganese-zinc ferrite nanopowder, the first mixed material and the second mixed material according to parts by mass, and setting aside; S5. After the mixer is rinsed and dried again, the proportioned manganese-zinc ferrite nano powder, the first mixed material and the second mixed material are added into the mixer, mixed and stirred to obtain a finished protective coating.

[0071] When the current carrying capacity of the high-voltage transmission line exceeds the preset threshold, the early warning subsystem automatically issues a warning or alarm message to remind the operation and maintenance personnel to take timely measures to deal with it, and provide timely maintenance suggestions to ensure the safe and stable operation of the power system.

[0072] Embodiment 1: Input the basic parameters of the experimental cable and the simulated operating environment parameters through the main control computer 2; the mobile experimental cabin 1 is opened, the electric scissor-type adjustment frame 13 is folded, and the mobile cabin frame 15 is driven to move, and then the flexible cover 14 is folded; The other end of the conductive cable is electrically connected to the main control operating computer component 2, which is used to detect the voltage level, current size and other experimental cable status information parameters. The two ends of the four-split high-voltage transmission wire pass through the clamping assembly 35, the through-hole mounting plate 36 and the buckle assembly 37 at the corresponding positions respectively. The telescopic end of the lifting push rod 45 drives the linkage cross bar 47 to extend, and pulls the two hinged connecting rods 48 to rotate around the fixed plate 44. The ends of the two hinged connecting rods 48 are synchronously retracted, thereby driving the arc clamping plate 49 to be synchronously retracted, so that the insulating anti-slip layer 50 is clamped on the four-split high-voltage transmission wire, and the telescopic end of the electric push rod 32 is retracted, pulling the tension sensor 33 , the tension sensor 33 pulls the base 34 to move, thereby pulling the clamping assembly 35, the through-hole mounting plate 36 and the buckle assembly 37, inserting the bare wire at the end of the four-split high-voltage transmission wire into the wiring barrel 25, and electrically connecting with the wiring barrel 25, so that the conductive cable is electrically connected with the four-split high-voltage transmission wire. At this time, the rotating cylinder 42 is manually rotated, and the rotating cylinder 42 drives a number of circumferentially evenly distributed vertical rod seats 40 to rotate, thereby driving the claw 38 to rotate synchronously, and adjusting the screw connection depth of the adjusting screw 39, so that the end of the adjusting screw 39 is against the fixed cylinder 43 for clamping and buckling, that is, the claw 38 is buckled in the clamping ring groove 26; The electric push rod 32, the tension sensor 33, the base 34 and the clamping assembly 35 cooperate to detect and record the tension of the four-split high-voltage transmission wire before and after coating when pulling the four-split high-voltage transmission wire, and transmit the tension data to the cable data subsystem; The mobile test cabin 1 is closed, the electric scissor-type adjustment frame 13 is unfolded, driving the mobile cabin frame 15 to move, and then driving the flexible cover 14 to unfold, the sealing protrusion 9 has a sealing groove 17 that matches the shape and specifications, and the two sealing telescopic rods are clamped on both sides of the water receiving bottom box 24 to seal, and the mobile test cabin 1 and the fixed test cabin 3 form a sealed space; The simulation subsystem controls the wind speed simulation subsystem to simulate the ambient wind speed, and controls the temperature simulation subsystem to simulate the ambient temperature. The cold air blower 77 blows air, and obtains cold air after passing through the refrigeration box 78. The cold air enters one side of the ventilation box 18 through the air outlet 79, and is blown onto the four-split high-voltage transmission wire to be evaluated clamped by the eight cable clamping subsystems through the ventilation box 18, simulating the ambient cold wind; the hot air blower 81 blows air, and obtains hot air after passing through the hot air box 80. The hot air enters the other side of the ventilation box 18, and is blown onto the four-split high-voltage transmission wire to be evaluated clamped by the eight cable clamping subsystems through the ventilation box 18, simulating the ambient hot wind. The cold air blower 77, the hot air blower 81 and the ventilation box 18 cooperate to simulate the ambient wind speed, and the wind speed sensor monitors the ambient wind speed in real time. Control the sunlight simulation subsystem to simulate sunlight intensity and sunlight direction, control the explosion-proof temperature control lamps 8 at different positions to light up, simulate sunlight intensity and sunlight direction, and the light sensor detects the light intensity for effective feedback; The precipitation simulation subsystem is controlled to simulate the environmental humidity. The water pump 60 draws clean water from the water tank 61 and injects it into the main water pipe 62. The water is then drained through a number of drainage pipes 64 and sprayed onto the four-split high-voltage transmission wires to be evaluated clamped by the eight cable clamping subsystems through precipitation nozzles 65 to simulate the environmental humidity and rainfall. The humidity sensor is used to detect the environmental humidity. The cable temperature measurement subsystem monitors the temperature of the four-split high-voltage transmission wire in real time, and a plurality of optical fiber temperature measurement sensors 11 are used to monitor the temperature of the experimental cable in real time and transmit the temperature data to the cable data subsystem; The cable data subsystem is used to collect data including but not limited to ambient temperature, ambient humidity, ambient wind speed, sunshine intensity, sunshine direction, test cable temperature, test cable outer diameter, test cable age, test cable stress, coating material and coating thickness; The current carrying capacity calculation and evaluation subsystem monitors and evaluates the current carrying capacity of high-voltage transmission conductors in real time, establishes a current carrying capacity calculation simulation evaluation model for transmission conductors based on the coating-conductor-steel core composite structure, analyzes the factors affecting the current carrying capacity of transmission lines with the coating-conductor-steel core composite structure, provides accurate evaluation results and early warning information, and helps operation and maintenance personnel to promptly discover and deal with potential problems; and obtains the current carrying capacity of the high-voltage transmission conductor without coating at that time.

[0073] Embodiment 2: On the basis of embodiment 1, the coating material 1 and the coating thickness of 0.5 mm are input through the main control operating computer component 2, the simulation subsystem controls the coating subsystem to coat the four-split high-voltage transmission line and control the spraying thickness, the coating material 1 is placed inside the coating material tank 68, the heating box 71 heats the coating material tank 68 so that the coating material can be stably transported, the exhaust fan 72 extracts the heat inside the heating box 71 and discharges it through the curved heat exhaust pipe 69, the curved heat exhaust pipe 69 keeps the coating material inside the coating material tank 68 warm, the discharge pump 67 injects the coating material into the electromagnetic flow valve 66, and the coating material is injected into the corresponding coating nozzle 58 through the electromagnetic flow valve 66; The cable drag chain 51 is used for routing, the output shaft of the mobile motor 59 drives the mobile gear, the mobile gear meshes with the rack 53, drives the sliding seat 54 to slide on the guide rail seat 52, thereby driving the coating nozzle 58 to move, the electric screw 55 drives the mechanical arm 56 to move longitudinally, and the mechanical arm 56 drives the electric arc clamping rod 57 to adjust the angle, so that the clamping rod of the electric arc clamping rod 57 is covered on both sides of the four-split high-voltage transmission wire, and the coating nozzle 58 is facing the four-split high-voltage transmission wire, and the coating is applied to the four-split high-voltage transmission wire, and the coating thickness is 0.5mm; After drying, the tension detection subsystem detects and records the tension of the four-split high-voltage transmission wire at that time; then the simulation subsystem controls the wind speed simulation subsystem to simulate the ambient wind speed, controls the sunshine simulation subsystem to simulate the sunshine intensity and sunshine direction, controls the temperature simulation subsystem to simulate the ambient temperature, and controls the precipitation simulation subsystem to simulate the ambient humidity; The simulation subsystem controls the wind speed simulation subsystem to simulate the ambient wind speed, controls the sunshine simulation subsystem to simulate the sunshine intensity and sunshine direction, controls the temperature simulation subsystem to simulate the ambient temperature, and controls the precipitation simulation subsystem to simulate the ambient humidity; the cable temperature measurement subsystem monitors the temperature of the four-split high-voltage transmission wires in real time, the cable data subsystem is used to collect various performance data parameters, and the current carrying capacity calculation and evaluation subsystem monitors and evaluates the current carrying capacity of the high-voltage transmission wire after coating in real time; the current carrying capacity of the high-voltage transmission wire when the coating thickness is 0.5mm is obtained.

[0074] Example 3: Based on Example 1, the coating material 1 and the coating thickness of 0.7 mm are input through the main control computer component 2, and the simulated current carrying capacity experimental steps of Example 2 are repeated to obtain the current carrying capacity of the high-voltage transmission line when the coating thickness is 0.7 mm.

[0075] Example 4: Based on Example 1, the coating material 1 and the coating thickness of 0.9 mm are input through the main control computer component 2, and the simulated current carrying capacity experimental steps of Example 2 are repeated to obtain the current carrying capacity of the high-voltage transmission line when the coating thickness is 0.9 mm.

[0076] Example 5: Based on Example 1, the coating material 1 and the coating thickness of 1.1 mm are input through the main control computer component 2, and the simulated current-carrying capacity experimental steps of Example 2 are repeated to obtain the current-carrying capacity of the high-voltage transmission line when the coating thickness is 1.1 mm.

[0077] Example 6: Based on Example 1, the coating material 1 and the coating thickness of 1.3 mm are input through the main control computer component 2, and the simulated current-carrying capacity experimental steps of Example 2 are repeated to obtain the current-carrying capacity of the high-voltage transmission line when the coating thickness is 1.3 mm.

[0078] Example 7: Based on Example 1, the coating material 1 and the coating thickness of 1.5 mm are input through the main control computer component 2, and the simulated current carrying capacity experimental steps of Example 2 are repeated to obtain the current carrying capacity of the high-voltage transmission line when the coating thickness is 1.5 mm.

[0079] Example 8: Based on Example 1, the coating material 1 and the coating thickness of 1.7 mm are input through the main control computer component 2, and the simulated current-carrying capacity experimental steps of Example 2 are repeated to obtain the current-carrying capacity of the high-voltage transmission line when the coating thickness is 1.7 mm.

[0080] The comparative experiment of coating material 1 was carried out on Examples 1-8. The comparative experiment table of coating material 1 is as follows: Fig.13 shown.

[0081] The current calculation of current carrying capacity generally adopts the current carrying capacity simulation calculation formula provided in the standard GB50545-2010 "110kV ~ 750kV Overhead Transmission Line Design Specification" implemented on July 1, 2010: ,in is the radiation heat dissipation power, and its value is:

[0082] Where D is the wire diameter; ε is the wire surface radiation heat dissipation coefficient, which is 0.23~0.43 for bright new wire and 0.9~0.95 for old wire or wire coated with black preservative; S is the Stefan-Boltzmann constant, 5.67×10-8 ; is the allowable temperature of the conductor surface; is the ambient temperature.

[0083] is the convection heat dissipation power. Its value is: Where v is the wind speed perpendicular to the conductor.

[0084] is the solar heat absorption power, and its value is α is the surface heat absorption coefficient of the conductor, which is 0.35~0.46 for bright new wire and 0.9~0.95 for old wire or wire coated with black preservative; J is the sunlight intensity on the conductor, which is 1000 when the sunlight shines directly on the conductor on a sunny day.

[0085] is the AC resistance at the allowable temperature.

[0086] In Example 9-16, compared with Example 1-8, the coating material 1 is changed to the coating material 2, and the other simulated current carrying test steps remain unchanged. The comparative experiment of the coating material 2 is carried out on Example 9-16. The comparative experiment of the coating material 2 is shown in the table. Fig.14 shown.

[0087] Depend on Fig.13 and Fig.14 It can be seen that the relationship between coating thickness and current carrying capacity and the effect of coating thickness on cooling effect are nonlinear. Within a certain range, as coating thickness increases, the temperature rise of the conductor decreases and the current carrying capacity increases. When the coating thickness reaches a certain critical value, the cooling effect tends to saturation and the current carrying capacity tends to saturation. Each coating material has an optimum coating constant k for the corresponding thickness.

[0088] Moreover, the sunlight reflection and heat dissipation effects of coating material 2 are significantly better than those of coating material 1, and the current carrying capacity effect of coating material 2 is better.

[0089] Program code used in the simulation evaluation system: #include <vector> #include <cmath> / / Assumed temperature distribution solution function std::vector <double>solve_temperature(const std::vector <double>&input_data) { / / Initialize the temperature distribution array std::vector <double>temperature_distribution(input_data.size(),0.0); / / Linear interpolation calculation for (size_t i = 0; i <input_data.size(); ++i) { temperature_distribution[i] = input_data[i]* some_coefficient; / / some_coefficient is a constant or function, determined according to the specific situation } return temperature_distribution; } / / Calculate current carrying capacity based on temperature distribution double calculate_capacity_from_temperature(const std::vector <double>&temperature_distribution) { / / Assumed current carrying capacity calculation function double current_capacity = 0.0; / / Calculate the sum for (double temp : temperature_distribution) { current_capacity += temp * another_coefficient; / / another_coefficient is a constant or function, determined according to the specific situation } / / Return the current carrying capacity return current_capacity; } The final simulation method of the present invention is to input relevant parameters into the simulation model of the main control operating computer component 2: Experimental cable status information parameters: outer diameter, resistance per unit length, newness, etc.; Simulate operating environment parameters: ambient temperature, ambient humidity, ambient wind speed, sunshine intensity and sunshine direction, etc.; Coating parameters: coating material and coating thickness, etc.

[0090] The current carrying capacity of the transmission line under the "coating-conductor-steel core" structure can be obtained: the current carrying capacity simulation calculation formula after coating is: .

[0091] Where k is the coating constant. The optimal coating constant k can be obtained after multiple simulation experiments. According to the cost of the coating material and the transportation requirements of the current carrying capacity, the coating constant k corresponding to the coating thickness is selected to obtain the maximum profit return and apply it to actual production.

[0092] The present invention can also control changes in other parameters to control variables and simulate and evaluate other required data.

[0093] In summary, the mobile test cabin 1 and the fixed test cabin 3 are used in coordination to simulate the monitoring test cabin and conduct a simulated operating environment; Through the cooperation of eight cable clamping subsystems, the four-split high-voltage transmission wires can be stably clamped and the voltage and current can be controlled to simulate power-on. The tension detection subsystem detects and records the tension of the four-split high-voltage transmission wires before and after coating. The sunshine simulation subsystem simulates sunshine intensity and sunshine direction, the temperature simulation subsystem simulates ambient temperature, the precipitation control simulation subsystem simulates ambient humidity, and the wind speed simulation subsystem simulates ambient wind speed to simulate the actual operating environment; The visual monitoring subsystem monitors the internal conditions of the fixed experimental cabin 3 and the mobile experimental cabin 1 in real time; the cable temperature measurement subsystem monitors the temperature of the four-split high-voltage transmission wires in real time; The cable data subsystem is used to collect various performance data parameters. The simulation subsystem uses simulation technology and algorithms to simulate the operating environment parameters and coating parameters of high-voltage transmission lines under various working conditions. By accurately modeling and simulating the physical characteristics and operating status of the conductors, the current carrying capacity and performance of the conductors are predicted. The current carrying capacity calculation and evaluation subsystem monitors and evaluates the current carrying capacity of the high-voltage transmission conductors after coating in real time. When the current carrying capacity of the high-voltage transmission conductors exceeds the preset threshold, the early warning subsystem automatically issues early warning or alarm information and provides timely maintenance suggestions.

[0094] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.< / double> < / double> < / double> < / double> < / cmath> < / vector>

Claims

1. A coating-conductor-steel core composite structure transmission line current carrying capacity simulation evaluation system, comprising a wind speed simulation subsystem, a tension detection subsystem, a fixed test cabin (3) and a mobile test cabin (1) opposite to the fixed test cabin (3), characterized in that: The mobile test cabin (1) is provided with a main control operation computer unit (2) on the outside, the mobile test cabin (1) is provided with a sunshine simulation subsystem and a visual monitoring subsystem on the inside, the mobile test cabin (1) and the fixed test cabin (3) are provided with a cable temperature measurement subsystem and a temperature simulation subsystem, the fixed test cabin (3) is provided with a precipitation simulation subsystem, a coating application subsystem and eight cable clamping subsystems, the precipitation simulation subsystem, the cable clamping subsystem and the coating application subsystem are arranged in order from top to bottom, the temperature simulation subsystem is located on the side of the cable clamping subsystem, and the main control operation computer unit (2) is provided with a cable data subsystem, a simulation subsystem, a current carrying capacity calculation and evaluation subsystem and an early warning subsystem.

2. The coating-conductor-steel core composite structure transmission line current carrying capacity simulation evaluation system according to claim 1, characterized in that: The mobile experimental cabin (1) comprises a mobile cabin wall and a U-shaped mobile cabin frame (15), the mobile cabin wall is provided with a plurality of exhaust valves, an electric scissor-type adjustment frame (13) and a flexible cover (14) are provided between the mobile cabin wall and the mobile cabin frame (15), the electric scissor-type adjustment frame (13) is located outside the flexible cover (14), the lower ends of the mobile cabin frame (15) and the electric scissor-type adjustment frame (13) are both provided with moving wheels (12), the outside of the mobile cabin frame (15) is provided with a sealing protrusion (9), and two symmetrically arranged sealing telescopic rods are provided between the mobile cabin frame (15) and the mobile cabin wall; the main control operation computer component (2) comprises a main control operation box and a main control computer (76), the main control operation box and the main control computer (76) are fixed on the outside of the mobile cabin wall, the main control operation box is provided with a switch button (73), a display screen with buttons (74) and a flashing warning light (75), and the main control computer (76) is connected to the display screen with buttons (74) by electric wires.

3. The coating-conductor-steel core composite structure transmission line current carrying capacity simulation evaluation system according to claim 2, characterized in that: The fixed experimental cabin (3) comprises a fixed bulkhead (16), the inner side of the fixed bulkhead (16) is provided with a sealing groove (17) matching the shape and specification of the sealing protrusion (9), the fixed bulkhead (16) is provided with a plurality of sealing cylinders (19) penetrating the fixed bulkhead (16), the inner lower end of the fixed bulkhead (16) is provided with a water receiving bottom box (24), the water receiving bottom box (24) is provided with a drainage pipe, the drainage pipe passes through the fixed bulkhead (16), two sealing telescopic rods are engaged with two sides of the water receiving bottom box (24), and two symmetrically arranged clamping brackets (20) are fixed to the inner side of the fixed bulkhead (16), every four cable clamping subsystems are arranged on one clamping bracket (20), and the eight cable clamping subsystems are symmetrically arranged in pairs.

4. The coating-conductor-steel core composite structure transmission line current carrying capacity simulation evaluation system according to claim 3, characterized in that: The sunlight simulation subsystem comprises a plurality of explosion-proof temperature control lamps (8) and a plurality of light sensors, wherein the explosion-proof temperature control lamps (8) are respectively fixed on the inner side of the movable cabin frame (15) and the inner side of the movable cabin wall, and the light sensors are respectively fixed on the inner side of the movable cabin frame (15) and the inner side of the fixed cabin wall (16); the visual monitoring subsystem comprises a plurality of visual cameras (10), wherein the visual cameras (10) are respectively fixed on the inner side of the movable cabin frame (15) and the inner side of the movable cabin wall; and the cable temperature measurement subsystem comprises a plurality of optical fiber temperature measurement sensors (11), wherein the optical fiber temperature measurement sensors (11) are respectively fixed on the inner side of the movable cabin wall and the upper end of the water receiving bottom box (24).

5. The coating-conductor-steel core composite structure transmission line current carrying capacity simulation evaluation system according to claim 4, characterized in that: The temperature simulation subsystem comprises a cold air component (4), a hot air component (7), a ventilation box (18) and a plurality of temperature sensors. The cold air component (4) and the hot air component (7) are located on the outside of the fixed bulkhead (16), the ventilation box (18) is fixed on the inside of the fixed bulkhead (16), and the temperature sensors are arranged inside the mobile experimental cabin (1) and the fixed experimental cabin (3). The cold air component (4) comprises a refrigeration box (78), a cold air fan (77) is fixed on the outside of the refrigeration box (78), an air outlet (79) is fixed on the inside of the refrigeration box (78), and the air outlet (79) is connected to one side of the ventilation box (18) through a pipeline. The pipeline between the air outlet tube (79) and the ventilation box (18) passes through the sealing tube (19) at the corresponding position. The hot air component (7) includes a hot air box (80). A hot air fan (81) is fixed on the outside of the hot air box (80). The air outlet of the hot air box (80) is connected to the other side of the ventilation box (18) through a pipeline. The pipeline between the air outlet of the hot air box (80) and the ventilation box (18) passes through the sealing tube (19) at the corresponding position. The wind speed simulation subsystem is composed of a cold air fan (77), a hot air fan (81), the ventilation box (18) and a plurality of wind speed sensors. The wind speed sensors are fixed on the inner side of the movable cabin frame (15).

6. The coating-conductor-steel core composite structure transmission line current carrying capacity simulation evaluation system according to claim 5, characterized in that: The precipitation simulation subsystem comprises a water injection tank assembly (6), a precipitation simulation mechanism (23) and a plurality of humidity sensors. The water injection tank assembly (6) is located outside the fixed bulkhead (16). The precipitation simulation mechanism (23) is arranged above the ventilation box (18). The water injection tank assembly (6) comprises a water pump (60) and a water tank (61). The water inlet end of the water pump (60) and the water tank (61) are connected via a pipeline. The precipitation simulation mechanism (23) comprises a main water pipe (62). The water outlet end of the water pump (60) is connected to the main water pipe (62). The water pipes (62) are connected by pipelines. The pipeline between the water outlet of the water pump (60) and the main water pipe (62) passes through the sealing cylinder (19) at the corresponding position. A plurality of supports (63) are fixed at the lower end of the main water pipe (62). The supports (63) are fixed above the ventilation box (18). A plurality of drainage pipes (64) are provided on the side of the main water pipe (62). A plurality of precipitation nozzles (65) are provided at the lower end of the drainage pipe (64). The humidity sensor is fixed inside the fixed experimental cabin (3) and the mobile experimental cabin (1).

7. The coating-conductor-steel core composite structure transmission line current carrying capacity simulation evaluation system according to claim 6, characterized in that: The coating application subsystem comprises a coating feeding mechanism (5) and a coating application mechanism (22), wherein the coating feeding mechanism (5) is located outside the fixed bulkhead (16), and the coating application mechanism (22) is arranged at the upper end of the water receiving bottom box (24). The coating feeding mechanism (5) comprises an electromagnetic flow valve (66), a discharge pump (67), an electric control box (70), and a heating box (71), wherein a coating material tank (68) is fixed at the upper end of the heating box (71), and a curved heat exhaust pipe (69) is arranged inside the coating material tank (68), and the upper end of the heat exhaust pipe (69) protrudes out of the coating material tank (68). The lower end of the heat exhaust pipe (69) extends out of the side of the coating material tank (68), and the lower end of the heat exhaust pipe (69) is provided with an exhaust fan (72) connected thereto. The air inlet end of the exhaust fan (72) is connected to the heating box (71), the feed end of the discharge pump (67) is connected to the coating material tank (68) via a pipeline, the discharge end of the discharge pump (67) is connected to the electromagnetic flow valve (66) via a pipeline, and the electric control box (70) is connected to the electromagnetic flow valve (66), the discharge pump (67), the heating box (71), the exhaust fan (72) and the main control operation computer (2) via electric wires; The coating coating mechanism (22) comprises a guide rail seat (52) and a drag chain plate, wherein the guide rail seat (52) and the drag chain plate are fixed to the upper end of the water receiving bottom box (24), a rack (53) is fixed to the side of the guide rail seat (52), a sliding seat (54) is slidably provided on the guide rail seat (52), a cable drag chain (51) is provided between the sliding seat (54) and the drag chain plate, a moving motor (59) and an electric screw (55) are fixed to the sliding seat (54), a moving gear is fixed to the output shaft of the moving motor (59), the moving gear is meshed with the rack (53), and a mechanical transmission is provided on the electric screw (55). A mechanical arm (56) is provided at the end of the mechanical arm (56), and two coating nozzles (58) are provided on the clamping rod of the electric arc clamping rod (57). The coating nozzles (58) are connected to the discharge end of the electromagnetic flow valve (66) through a pipeline. The pipeline between the coating nozzles (58) and the discharge end of the electromagnetic flow valve (66) passes through a sealing cylinder (19) at a corresponding position. The cable drag chain (51) is respectively connected to the electric lead screw (55), the mechanical arm (56), the electric arc clamping rod (57), the moving motor (59) and the electric control box (70) through electric wires.

8. The coating-conductor-steel core composite structure transmission wire current carrying capacity simulation evaluation system according to claim 7, characterized in that: The cable clamping mechanism (21) comprises a wiring seat (27) and an electric push rod (32), the wiring seat (27) and the electric push rod (32) being fixed on a clamping bracket (20) at corresponding positions, the wiring seat (27) being provided with a wiring barrel (25), the outer side of the wiring barrel (25) being provided with a snap ring groove (26), a support frame (30) being fixed to the rear side of the wiring seat (27), a connecting rod (29) being slidably provided on the support frame (30), one end of the connecting rod (29) being hingedly connected to the wiring seat (27) by a hinged connecting rod (28), the other end of the connecting rod (29) being provided with a locking ring plate (31) which is positioned opposite to the wiring seat (27), a conductive cable being provided between the locking ring plate (31) and the connecting rod (29), one end of the conductive cable extending into the connecting rod (29). The conductive cable is electrically connected to the wiring barrel (25) inside the wiring seat (27), and the other end of the conductive cable passes through the sealing barrel (19) at the corresponding position, and the other end of the conductive cable is electrically connected to the main control operating computer component (2); a tension sensor (33) is fixed to the telescopic end of the electric push rod (32), a base (34) is fixed to the tension sensor (33), a clamping assembly (35) and a through-hole mounting plate (36) are provided on the base (34), and a buckle assembly (37) is provided on the through-hole mounting plate (36), the clamping assembly (35) and the buckle assembly (37) are both colinear with the axis of the wiring barrel (25), and the tension detection subsystem is composed of the electric push rod (32), the tension sensor (33), the base (34) and the clamping assembly (35).

9. The coating-conductor-steel core composite structure transmission wire current carrying capacity simulation evaluation system according to claim 8, characterized in that: The clamping assembly (35) comprises a fixing plate (44), a lifting push rod (45) is fixed on the fixing plate (44), a linkage cross bar (47) is fixed to the telescopic end of the lifting push rod (45), both ends of the linkage cross bar (47) are hinged with hinged connecting rods (48), the hinged connecting rod (48) is hinged on the fixing plate (44), the end of the hinged connecting rod (48) is hinged with an arc clamping plate (49), and the inner side of the arc clamping plate (49) is provided with an insulating anti-slip layer (50); the buckle assembly (37) comprises a fixing cylinder (43), the fixing cylinder (4 3) fixed on the through-hole mounting plate (36), a plurality of circumferentially evenly distributed adjusting grooves (41) are formed on the fixed cylinder (43), a rotating cylinder (42) is rotatably provided inside the fixed cylinder (43), a plurality of circumferentially evenly distributed vertical rod seats (40) are fixed on the rotating cylinder (42), buckles (38) are hinged on the vertical rod seats (40), and the ends of the buckles (38) are screwed with adjusting screws (39), the positions and numbers of the adjusting screws (39) correspond to the adjusting grooves (41), and the adjusting screws (39) are directly opposite to the adjusting grooves (41) at the corresponding positions.

10. The coating-conductor-steel core composite structure transmission wire current carrying capacity simulation evaluation system according to claim 9, characterized in that: The cable data subsystem is used to collect data including but not limited to ambient temperature, ambient humidity, ambient wind speed, sunshine intensity, sunshine direction, test cable temperature, test cable outer diameter, test cable age, test cable stress, coating material and coating thickness; The simulation subsystem uses simulation technology and algorithms to simulate the operating environment parameters and coating parameters of high-voltage transmission lines under various working conditions, including but not limited to the influence of external factors such as ambient temperature, ambient humidity and ambient wind speed, as well as the influence of coating materials and coating thickness, and predicts the current carrying capacity and performance of the conductor by accurately modeling and simulating the physical characteristics and operating status of the conductor; The current carrying capacity calculation and evaluation subsystem monitors and evaluates the current carrying capacity of high-voltage transmission lines in real time, establishes a current carrying capacity calculation simulation evaluation model for transmission lines based on a coating-conductor-steel core composite structure, and uses coating parameters as variables to simulate and evaluate the relationship between coating parameters and current carrying capacity and experimental cable temperature, while keeping the simulated operating environment parameters and experimental cable basic parameters the same. The influencing factors of the current carrying capacity of the transmission line of the coating-conductor-steel core composite structure are analyzed, and the current carrying capacity simulation calculation formula after coating is obtained, providing accurate evaluation results and early warning information, helping operation and maintenance personnel to promptly discover and deal with potential problems; When the current carrying capacity of the high-voltage transmission line exceeds a preset threshold, the early warning subsystem automatically issues an early warning or alarm message to remind the operation and maintenance personnel to take timely measures to deal with it, and provide timely maintenance suggestions to ensure the safe and stable operation of the power system.

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