A power distribution shelter control method and system for high-altitude environments, a terminal and a medium

Abstract

The application relates to a power distribution shelter control method and system for a high-altitude environment, a terminal and a medium, and relates to the technical field of power distribution shelters. The method comprises the following steps: acquiring air pressure information and temperature information in a power distribution shelter, and calculating an air density parameter based on the air pressure information and the temperature information; correcting a breakdown voltage threshold value according to the air density parameter to obtain a corrected breakdown voltage; acquiring a working voltage of a key high-voltage unit in the power distribution shelter, and calculating a safety margin of the working voltage and the corrected breakdown voltage; if the safety margin is lower than a preset margin margin threshold value, reducing a power distribution bus voltage to a safety operation voltage range matched with the safety margin, and reducing a voltage of a preset non-key load unit; acquiring a field intensity distribution of the key high-voltage unit; if there is a low margin area less than a preset lower limit margin, performing a field intensity suppression operation on the low margin area according to a preset field intensity suppression method. The application has the effect of reducing the probability of breakdown of the power distribution shelter.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of power distribution shelters, in particular to a power distribution shelter control method and system in a high-altitude environment, a terminal and a medium. BACKGROUND

[0002] With the increasing construction of new energy power stations, remote mountain area power grids and communication base stations in plateau areas and other facilities, power distribution shelters, as core equipment in high-voltage power supply systems, are increasingly deployed in high-altitude environments. In such environments, due to the decrease in atmospheric pressure, the sharp change in temperature and the decrease in air density, the breakdown voltage threshold of electrical insulation medium is lowered, thereby making the high-voltage equipment in the power distribution shelter face greater insulation breakdown risks.

[0003] The design of the power distribution shelter system is often based on standard altitude (i.e. low altitude or normal pressure environment) conditions, and the electrical gap, equipment voltage withstand level and protection margin are not considered in the influence of the thin air in the plateau on the electrical performance. When operating in high-altitude areas, the equipment is prone to breakdown at the original design safe voltage, causing system interruption or power damage. Breakdown refers to the sudden increase in current of an electrical insulation medium when the electric field strength exceeds its insulation limit, resulting in insulation performance failure, current passing through the insulator to form a conductive channel, thereby causing local or overall circuit short circuit, equipment damage, and even safety accidents.

[0004] According to the related technology in the above, the probability of breakdown of the power distribution shelter in the high-altitude environment is high. SUMMARY

[0005] In order to reduce the probability of breakdown of the power distribution shelter, the application provides a power distribution shelter control method and system in a high-altitude environment, a terminal and a medium.

[0006] In a first aspect, the application provides a power distribution shelter control method in a high-altitude environment, which adopts the following technical solution:

[0007] A power distribution shelter control method in a high-altitude environment, comprising:

[0008] Obtaining air pressure information and temperature information in the power distribution shelter, and calculating an air density parameter based on the air pressure information and the temperature information;

[0009] Correcting the breakdown voltage threshold according to the air density parameter to obtain a corrected breakdown voltage;

[0010] Obtaining the working voltage of a key high-voltage unit in the power distribution shelter, and calculating the safety margin between the working voltage and the corrected breakdown voltage;

[0011] Judging whether the safety margin is lower than a preset tolerance margin threshold;

[0012] If yes, the power distribution bus voltage is reduced to a safe operating voltage range matching the safety margin, and the voltage of the preset non-critical load unit is reduced;

[0013] Obtain the field intensity distribution of the critical high-voltage unit and determine whether there is a low-margin area less than the preset lower limit margin based on the field intensity distribution;

[0014] If yes, perform field intensity suppression operation on the low-margin area according to the preset field intensity suppression method.

[0015] By adopting the above technical solutions, after obtaining the air pressure information and temperature information of the power distribution shelter in the high-altitude environment, the breakdown voltage threshold can be accurately corrected based on the air pressure information and temperature information, and the safety margin of the critical high-voltage unit can be calculated to adjust the voltage of the power distribution bus and the non-critical load unit, effectively identify and suppress the low-margin electric field area, thereby significantly improving the insulation safety performance and operation stability of the power distribution shelter, reducing the probability of breakdown phenomenon, and ensuring the long-term reliable operation of the equipment.

[0016] Optionally, the step of performing field intensity suppression operation on the low-margin area according to the preset field intensity suppression method comprises:

[0017] Collecting potential data of the critical high-voltage unit;

[0018] According to the potential data, identifying adjacent nodes with a potential difference exceeding a preset balancing threshold, and adjusting the coupling state of the adjacent nodes to establish a low-impedance channel between the adjacent nodes;

[0019] Again obtaining the field intensity distribution of the critical high-voltage unit and determining whether there is still a low-margin area less than the preset lower limit margin based on the field intensity distribution;

[0020] If yes, control the flexible shielding film unit to unfold to cover the low-margin area to obtain a covered area;

[0021] Passing a preset proportion of protective gas into the covered area.

[0022] By adopting the above technical solutions, after identifying that there is a low-margin area less than the preset lower limit margin, the potential difference is first balanced by constructing a low-impedance channel to reduce the local electric field intensity; if the low-margin area still exists, further shielding by the flexible shielding film and injecting protective gas to enhance the local insulation performance, thereby suppressing the field intensity of the low-margin area and ensuring the safe operation of the power distribution shelter.

[0023] Optionally, obtaining the temperature distribution of the covered area;

[0024] According to the temperature distribution, identifying an area with a temperature greater than a preset temperature threshold to obtain a high-temperature area;

[0025] Determine the ventilation direction according to the location of the high-temperature region;

[0026] Perform a temperature reduction operation on the temperature of the protective gas according to the temperature of the high-temperature region to obtain a temperature-reduced gas;

[0027] Control the temperature-reduced gas to be introduced into the covered region along the ventilation direction.

[0028] By adopting the above technical solution, the temperature distribution in the covered region is obtained to identify the high-temperature region, and the protective gas is ventilated along the ventilation direction according to the high-temperature region, so as to reduce the temperature of the high-temperature region. By reducing the temperature of the protective gas, the effect of reducing the temperature of the high-temperature region can be improved, the problem of heat accumulation caused by local electric field concentration or discharge can be effectively inhibited, and the heat stability and insulation performance of the covered region can be improved, thereby further reducing the risk of local breakdown or thermal damage.

[0029] Optionally, the step of determining the ventilation direction according to the location of the high-temperature region comprises:

[0030] Count the number of high-temperature regions to obtain a high-temperature region number;

[0031] In the case where the high-temperature region number is greater than one, the area of the high-temperature region is sequentially obtained to obtain a high-temperature area;

[0032] Perform clustering processing on the high-temperature region according to the high-temperature area to obtain a high-temperature cluster region;

[0033] Calculate a cluster priority score based on the maximum temperature value, the area, and the temperature mean value of each high-temperature cluster region;

[0034] Determine a ventilation path based on the priority score and determine the ventilation direction based on the ventilation path.

[0035] By adopting the above technical solution, when multiple high-temperature regions exist in the covered region, the high-temperature regions are clustered and processed, and a cluster priority score is obtained based on the high-temperature cluster region, and the ventilation path and the ventilation direction are planned according to the cluster priority score, so as to realize rapid response and targeted temperature reduction processing of local hot spots.

[0036] Optionally, the current spike signal of the key high-voltage unit is monitored, and it is determined whether a local breakdown region exists according to the current spike signal;

[0037] Determine the location of the local breakdown region based on the field strength distribution, the potential data, and the electric field disturbance data of the flexible shielding film unit to obtain a breakdown position;

[0038] Obtain the damage level of the local breakdown region according to a preset damage degree judgment method;

[0039] In the case of slight damage, the flexible shielding film is controlled to remain in an unfolded state, and an insulating spraying material is added to the pre-set proportion of protective gas flowing into the covered area;

[0040] In the case of moderate damage, the corresponding power distribution module of the key high-voltage unit is controlled to perform local power-off operation, and a standby bypass power supply channel is connected;

[0041] In the case of high damage, the power distribution shelter is controlled to perform global power-off operation.

[0042] By adopting the above technical solutions, the local breakdown position is quickly located by monitoring the current peak signal and combining the field strength, electric potential and disturbance data of the flexible shielding film, and the damage degree is divided into slight, moderate and high levels according to the damage degree, and the differential processing strategies of maintaining power supply and injecting insulating spraying material, local power-off and switching standby bypass power supply channel, and global power-off are correspondingly selected, so as to effectively balance the power supply continuity and insulation safety, and improve the operation stability and risk response ability of the power distribution shelter in special environment.

[0043] Optionally, the step of obtaining the damage level of the local breakdown area according to the pre-set damage degree judgment method comprises:

[0044] Temperature evolution data of the local breakdown area is collected, including peak temperature, high temperature duration and thermal expansion area;

[0045] The decomposition gas composition and concentration of the local breakdown area are detected;

[0046] Local images and infrared images of the local breakdown area are obtained;

[0047] The temperature evolution data, decomposition gas composition, decomposition gas concentration, local images and infrared images are input into a pre-set damage level recognition model to output the damage level of the local breakdown area.

[0048] By adopting the above technical solutions, the real state of the fault area can be comprehensively reflected from multiple dimensions of heat change, electrical decomposition product key features and visual images by collecting temperature evolution data of the local breakdown area, detecting decomposition gas composition and concentration, and obtaining local images and infrared images. Combined with the pre-set damage level recognition model, the above multi-dimensional data is fused to improve the accuracy of damage level recognition of the local breakdown area.

[0049] Optionally, before adding the insulating spraying material to the pre-set proportion of protective gas flowing into the covered area, the method further comprises:

[0050] determine the insulation damage type of the current partial breakdown region according to the decomposition product gas composition of the partial breakdown region;

[0051] determine the target insulation spraying material according to the insulation damage type;

[0052] determine the damage degree of the current partial breakdown region according to the decomposition product gas concentration and the local image;

[0053] determine the spraying dose of the target insulation spraying material according to the damage degree.

[0054] By adopting the above technical solutions, the insulation damage type can be identified based on the decomposition product gas composition of the partial breakdown region, and then the targeted insulation spraying material is selected; the damage degree is evaluated in combination with the decomposition product gas concentration and the local image information, the intelligent control of the spraying dose is realized, the pertinence and effectiveness of the repair of the partial breakdown region are improved, the waste of the insulation spraying material is reduced, and the reliability and operation safety of the power distribution shelter in the high-altitude environment are enhanced.

[0055] In a second aspect, the present application provides a power distribution shelter control system in a high-altitude environment, which adopts the following technical solutions:

[0056] A power distribution shelter control system in a high-altitude environment, comprising:

[0057] an acquisition module, configured to acquire air pressure information, temperature information, working voltage, and field intensity distribution;

[0058] a memory, configured to store a program of the power distribution shelter control method in the high-altitude environment;

[0059] a processor, the program in the memory can be loaded and executed by the processor and implement the power distribution shelter control method in the high-altitude environment.

[0060] By adopting the above technical solutions, after the air pressure information and the temperature information in the high-altitude environment where the power distribution shelter is located are acquired, the breakdown voltage threshold can be accurately corrected based on the air pressure information and the temperature information, and the safety margin of the key high-voltage unit can be calculated to adjust the voltage of the power distribution bus and the non-key load unit, the low-margin electric field region can be effectively identified and suppressed, thereby the insulation safety performance and the operation stability of the power distribution shelter are significantly improved, the probability of breakdown is reduced, and the long-term reliable operation of the equipment is ensured.

[0061] In a third aspect, the present application provides an intelligent terminal, which adopts the following technical solutions:

[0062] An intelligent terminal, comprising a memory and a processor, and the memory stores a computer program capable of being loaded and executed by the processor to implement the method in any one of the above.

[0063] In a fourth aspect, the present application provides a computer storage medium capable of storing a corresponding program, having the characteristics of facilitating the reduction of the probability of breakdown phenomenon of the power distribution shelter, and adopting the following technical solution: a computer readable storage medium storing a computer program capable of being loaded by a processor and executing any of the above power distribution shelter control methods in a high-altitude environment.

[0064] In summary, the present application includes at least one of the following beneficial technical effects:

[0065] 1. After obtaining the air pressure information and temperature information of the power distribution shelter in the high-altitude environment, the breakdown voltage threshold can be accurately corrected based on the air pressure information and temperature information, and the safety margin of the key high-voltage unit can be calculated to adjust the voltage of the power distribution bus and the non-critical load unit, effectively identify and suppress the low-margin electric field region, thereby significantly improving the insulation safety performance and operation stability of the power distribution shelter, reducing the probability of breakdown phenomenon, and ensuring the long-term reliable operation of the equipment;

[0066] 2. By obtaining the temperature distribution in the shaded area, the high-temperature area is identified, and according to the ventilation direction of the high-temperature area, the protective gas can be ventilated along the ventilation direction to cool the high-temperature area. By cooling the protective gas, the cooling effect of the high-temperature area can be improved, effectively suppressing the heat accumulation problem caused by local electric field concentration or discharge, thereby improving the thermal stability and insulation performance of the shaded area, and further reducing the risk of local breakdown or thermal damage;

[0067] 3. By monitoring the current peak signal and combining the disturbance data of the field strength, potential and flexible shielding film, the local breakdown position is quickly located, and according to the damage degree, it is divided into light, moderate and high grades, respectively corresponding to the difference processing strategies of maintaining power supply and injecting insulation spraying material, local power failure and switching standby bypass power supply channel, and global power failure, thereby effectively balancing the power supply continuity and insulation safety, and improving the operation stability and risk response ability of the power distribution shelter in special environment. BRIEF DESCRIPTION OF DRAWINGS

[0068] Figure 1 is a flowchart of a power distribution shelter control method in a high-altitude environment in an embodiment of the present application.

[0069] Figure 2 is a flowchart of the steps of the field strength suppression operation on the low-margin area according to the preset field strength suppression method in an embodiment of the present application.

[0070] Figure 3 is a flowchart of a directional ventilation method in an embodiment of the present application.

[0071] Figure 4is a flowchart of a step of determining a ventilation direction according to a location of a high-temperature region in an embodiment of the present application.

[0072] Figure 5 is a flowchart of a partial breakdown phenomenon response method in an embodiment of the present application.

[0073] Figure 6 is a flowchart of a step of obtaining a damage level of a partial breakdown region according to a preset damage degree judgment method in an embodiment of the present application.

[0074] Figure 7 is a flowchart of an insulating spray material determination method in an embodiment of the present application. DETAILED DESCRIPTION

[0075] To make the objectives, technical solutions, and advantages of the present application clearer, the following further describes the present application in detail with reference to the accompanying drawings and embodiments. Figure 1 - the accompanying drawings Figure 7 and embodiments. It should be understood that the specific embodiments described herein are merely intended to explain the present application and not to limit the present application.

[0076] An electrical power distribution shelter control method in a high-altitude environment is disclosed in an embodiment of the present application. Referring to Figure 1 , the electrical power distribution shelter control method in a high-altitude environment includes:

[0077] Step S101: Obtain air pressure information and temperature information in the electrical power distribution shelter, and calculate an air density parameter based on the air pressure information and the temperature information.

[0078] The air pressure information can be obtained by an air pressure gauge arranged in the electrical power distribution shelter, and the temperature information can be obtained by a thermometer arranged in the electrical power distribution shelter.

[0079] According to the ideal gas formula, ρ = P / (R*T), where ρ is the air density, P is the absolute pressure, R is the gas constant, and T is the absolute temperature. The value of the gas constant R is 287 J / (kg·K)

[0080] The air pressure value obtained by the air pressure gauge is set as p1, and the temperature value obtained by the thermometer is set as t1, where T = t1 + t0, t0 is the conversion constant between the Celsius temperature scale (℃) and the Kelvin temperature scale (K), and t0 = 273.15. Therefore, ρ = p1 / (R*(t1 + t0)).

[0081] Therefore, the air density parameter can be obtained by the above calculation method.

[0082] Step S102: Correct the breakdown voltage threshold according to the air density parameter to obtain a corrected breakdown voltage.

[0083] The breakdown voltage threshold is the minimum voltage value at which the insulating medium occurs breakdown discharge under standard environment, wherein the standard environment refers to an environment with an atmospheric pressure of 1 standard atmosphere, an air temperature of 20 DEG C, and a uniform electric field. Assuming that the corresponding breakdown voltage threshold under the standard environment is U0, the corrected breakdown voltage can be calculated according to the following formula: U corr =U0(ρ / ρ0) k , wherein U corr is the corrected breakdown voltage; U0 is the breakdown voltage threshold; p is the current air density; p0 is the standard air density; k is the correction index, k is a preset constant, and the value range of k is 0.7-0.9.

[0084] After obtaining the air density parameter, the breakdown voltage threshold can be corrected according to the foregoing calculation method to obtain the corrected breakdown voltage threshold, that is, the corrected breakdown voltage.

[0085] Step S103: Obtain the working voltage of the key high-voltage unit in the power distribution shelter, and calculate the safety margin between the working voltage and the corrected breakdown voltage.

[0086] The power distribution shelter is provided with a transformer, an incoming line cabinet, a contact cabinet, an UPS, a feeder cabinet, an SVG and other power distribution modules, and the key high-voltage unit refers to the components in the power distribution module that are directly related to the main electric energy distribution, switching, protection and other functions, such as high-voltage circuit breakers, contactors, busbars, cable terminals, terminal blocks and the like, which usually bear high voltage and are the key monitoring objects of insulation failure.

[0087] The safety margin refers to the remaining safety value between the working voltage and the corrected breakdown voltage, which exists in the form of proportion. The calculation formula of the safety margin M is M=(U corr -U work ) / U corr , wherein U work is the working voltage of the key high-voltage unit.

[0088] Step S104: Determine whether the safety margin is lower than a preset tolerance margin threshold.

[0089] The preset tolerance margin threshold is a preset constant, which can be adjusted according to actual needs, and is a predefined minimum safety margin limit for judging the dangerous threshold of the insulation capacity of the key high-voltage unit.

[0090] The purpose of determining whether the safety margin is lower than the preset tolerance margin threshold is to prewarn and respond to the potential breakdown risk.

[0091] Step S105: If yes, the power distribution bus voltage is reduced to a safe operation voltage range matched with the safety margin, and the voltage of the preset non-key load unit is reduced.

[0092] In another aspect, if the safety margin is not lower than the preset margin threshold, no processing is performed.

[0093] The distribution bus voltage refers to the working voltage borne by the bus for transmitting electric energy.

[0094] The safe operating voltage range refers to the maximum operating voltage range of the key high-voltage unit in normal operation without breakdown phenomenon. The safe operating voltage is positively correlated with the safety margin.

[0095] The non-critical load unit refers to a module unit arranged inside the power distribution shelter, which will not cause substantial impact on the main power supply path in a short time when the voltage is reduced, such as SVG, low-priority feeder cabinet, etc.

[0096] Step S106: Obtain the field intensity distribution of the key high-voltage unit and determine whether there is a low-margin area less than the preset lower margin based on the field intensity distribution.

[0097] The field intensity distribution refers to the numerical distribution of electric field intensity at different positions within the spatial range of the key high-voltage unit. The field intensity distribution can be obtained by the electric field sensor array arranged in the power distribution module.

[0098] The preset lower margin is a preset constant, which refers to the minimum field intensity safety margin threshold required to ensure safety insulation. The area below this value will be judged as a potential breakdown risk area, and this potential breakdown risk area is defined as a low-margin area.

[0099] The field intensity margin of each sensor in the electric field sensor array can be calculated, compared with the preset lower margin, to determine whether there is a low-margin area. The field intensity margin of each sensor at point i is calculated by the formula: M i =(E break,i -E i ) / E break,i . Wherein, E i represents the field intensity at point i, E break,i is the breakdown field intensity corresponding to point i, and M i is the field intensity margin of point i. The preset lower margin is set to M th , if M i <M th , it means that the sensor at point i is a low-margin area. Wherein, the breakdown field intensity threshold E break =E0(ρ / ρ0) k , E0 represents the breakdown field intensity in the standard environment, which can be obtained by breakdown experiment of the key high-voltage unit, and the breakdown field intensity threshold E break can be obtained by referring to the formula for correcting the breakdown voltage in step S102.

[0100] Step S107: If yes, field strength suppression operation is performed on the low margin area according to the preset field strength suppression method.

[0101] The preset field strength suppression method refers to a technical solution for reducing the electric field strength of the low margin area during system operation.

[0102] The purpose of this step is to reduce the field strength of the low margin area to avoid breakdown phenomenon. The field strength suppression operation on the low margin area according to the preset field strength suppression method can refer to the steps in the embodiments. Figure 2

[0103] By adopting the above technical solution, after obtaining the air pressure information and temperature information of the power distribution shelter in a high-altitude environment, the breakdown voltage threshold can be accurately corrected based on the air pressure information and temperature information, and the safety margin of the key high-voltage unit can be calculated to adjust the voltage of the power distribution bus and the non-key load unit. The low margin electric field area is effectively identified and suppressed, thereby significantly improving the insulation safety performance and operation stability of the power distribution shelter, reducing the probability of breakdown phenomenon, and ensuring the long-term reliable operation of the equipment.

[0104] Referring to Figure 2 , the step of performing field strength suppression operation on the low margin area according to the preset field strength suppression method includes:

[0105] Step S201: Collecting electric potential data of the key high-voltage unit.

[0106] The electric potential data can be obtained by the electric potential sensor arranged around the key high-voltage unit.

[0107] Step S202: According to the electric potential data, identifying adjacent nodes with a potential difference value exceeding a preset balance threshold, and adjusting the coupling state of the adjacent nodes to establish a low-impedance channel between the adjacent nodes.

[0108] The node refers to a connection point with electric potential on the key high-voltage unit, such as the connection point of the busbar and the contact end of the high-voltage circuit breaker. The potential difference value refers to the potential difference between adjacent nodes, reflecting the electric field driving force between them, wherein the larger the value is, the more concentrated the electric field is.

[0109] The preset balance threshold is a preset constant, indicating the upper limit of the potential difference allowable range. When the potential difference of adjacent nodes exceeds the preset balance threshold, it is considered that the electric field distribution is unbalanced, and there is an insulation risk.

[0110] ​Low impedance channel refers to a controllable electrical connection with electrical impedance less than the original coupling state, used to reduce the potential difference and release the electric field gradient stress for a short time. It is composed of a voltage equalization device (such as a current limiting module) combined with a control switch (such as MOSFET, IGBT). When the potential difference between adjacent nodes exceeds the preset equalization threshold, the controller drives the control switch to turn on, accesses the low impedance channel, and forms a short-time controlled conduction state between the two nodes. The current limiting and time control mechanism in the impedance channel ensures that the potential discharge process does not cause overcurrent or thermal damage, and automatically disconnects when the potential difference falls to a safe value.

[0111] Step S203: Obtain the field strength distribution of the key high-voltage unit again, and determine whether there is still a low-marginal area less than the preset lower limit margin based on the field strength distribution.

[0112] By re-executing the step of obtaining the field strength distribution of the key high-voltage unit, and determining whether there is still a low-marginal area less than the preset lower limit margin, it is determined whether the potential difference between adjacent nodes is significantly reduced after executing the preceding steps. The execution method of this step can refer to the execution method in step S106.

[0113] Step S204: If yes, control the flexible shielding film unit to unfold to cover the low-marginal area, obtaining a covered area.

[0114] In another aspect, if there is no low-marginal area less than the preset lower limit margin, no further processing is performed.

[0115] Flexible shielding film unit refers to a flexible structure with conductive expandable film material for electric field shielding, which can be metal foil composite film, conductive fabric, and polymer composite film, etc.

[0116] Optionally, the inside top of the power distribution shelter is provided with a moving slide rail in the length direction, and a plurality of liftable flexible shielding film units are arranged on the moving slide rail.

[0117] By controlling the flexible shielding film unit to move on the moving slide rail and move in the vertical direction, when facing the low-marginal area, the flexible shielding film unit is unfolded to cover the low-marginal area, forming a semi-closed covered area.

[0118] Step S205: Introduce a preset proportion of protective gas into the covered area.

[0119] Protective gas refers to a gas with high insulation, stability and high voltage resistance characteristics to provide a breakdown voltage threshold, such as sulfur hexafluoride, nitrogen, fluorinated gas mixture, etc.

[0120] The preset proportion is a preset constant.

[0121] Two sides of the flexible shielding film unit are provided with support cylinders, and optional spraying joints are arranged on the support cylinders and communicate with the gas conveying device.

[0122] After the flexible shielding film unit is unfolded, the preset proportion of the protective gas is introduced into the covered area through the spraying joint, and the protective gas will replace part of the air after entering or form a stable mixed environment with the air, thereby improving the insulation capacity of the local space, increasing the breakdown voltage threshold, and ensuring that the area also has sufficient electrical margin in a high-altitude low-pressure environment.

[0123] By adopting the above technical scheme, after identifying the low-margin area less than the preset lower limit margin, the potential difference is balanced by constructing a low-impedance channel to reduce the local electric field strength; if the low-margin area still exists, the local insulation performance is enhanced by covering and injecting protective gas through the flexible shielding film, thereby suppressing the field strength of the low-margin area and ensuring the safe operation of the power distribution shelter.

[0124] The embodiment of the application provides a directional ventilation method, referring to Figure 3 The method comprises the following steps:

[0125] Step S301: Obtain the temperature distribution of the covered area.

[0126] The covered area can be collected by an infrared camera for real-time thermal imaging detection, and the infrared thermal radiation intensity is converted into a corresponding temperature value to construct a temperature distribution image of the covered area, i.e., the temperature distribution.

[0127] Step S302: Identify the area with a temperature greater than a preset temperature threshold according to the temperature distribution to obtain a high-temperature area.

[0128] The preset temperature threshold is a preset constant, which can be adjusted according to actual conditions. If the temperature of a local area is greater than the preset temperature threshold, the local area may have a thermal anomaly, and the area is defined as a high-temperature area.

[0129] After obtaining the temperature distribution image of the covered area, the area with a temperature greater than the preset temperature threshold is framed in the form of a detection frame, and the area where the detection frame is located is the high-temperature area, wherein the coordinates of the center point of the detection frame are the coordinates of the high-temperature area in the temperature distribution image.

[0130] Step S303: Determine the ventilation direction according to the position of the high-temperature area.

[0131] The ventilation direction refers to the direction of the protective gas blowing to the high-temperature area, and the ventilation direction can be adjusted by adjusting the spraying joint.

[0132] In this process, after obtaining the coordinates of the high-temperature area in the temperature distribution image, the position of the spray nozzle is mapped onto the temperature distribution image, and the orientation of the spray nozzle is adjusted according to the coordinates of the high-temperature area in the temperature distribution image, thereby determining the ventilation direction so that the protective gas can be blown toward the high-temperature area.

[0133] Step S304: Reduce the temperature of the protective gas according to the temperature of the high-temperature area to obtain a cooling gas.

[0134] The average temperature of the high-temperature region can be calculated based on the temperature distribution image to obtain the temperature of the high-temperature region. After obtaining the temperature of the high-temperature region, the liquid nitrogen introduction time is adjusted according to the temperature of the high-temperature region. During the process of blowing the protective gas into the high-temperature region, liquid nitrogen is added to the protective gas in the form of atomization and in stages according to the introduction time to reduce the temperature of the protective gas, thereby obtaining a cooling gas.

[0135] Step S305: Control the cooling gas to be introduced into the covered area along the ventilation direction.

[0136] By adopting the above technical solution, the temperature distribution within the covered area is obtained to identify high-temperature areas. Based on the ventilation direction of the high-temperature areas, the protective gas can be ventilated along the ventilation direction to cool the high-temperature areas. By cooling the protective gas, the cooling effect on the high-temperature areas can be improved, effectively suppressing the heat accumulation problem caused by local electric field concentration or discharge, thereby improving the thermal stability and insulation performance of the covered area and further reducing the risk of local breakdown or thermal damage.

[0137] Reference Figure 4 The steps for determining the ventilation direction based on the location of the high-temperature area include:

[0138] Step S401: Count the number of high-temperature areas to obtain the total number of high-temperature areas.

[0139] In some cases, there is a probability that multiple high-temperature areas exist within the same covered area, so the ventilation direction needs to be adjusted according to the number of high-temperature areas.

[0140] In the temperature distribution image, several detection boxes are used to select several regions where the temperature is higher than a preset temperature threshold. The number of detection boxes is the number of high-temperature regions.

[0141] Step S402: If the number of high-temperature regions is greater than one, obtain the area of ​​each high-temperature region in turn to obtain the high-temperature area.

[0142] On the other hand, if the number of high-temperature zones is no more than one, then refer to... Figure 4 The steps in the embodiments are performed.

[0143] If the number of high-temperature regions is greater than one, the area of the high-temperature region is obtained in sequence, and the area of the high-temperature region can be obtained by the area of the detection frame.

[0144] Step S403: Clustering processing is performed on the high-temperature regions according to the high-temperature area, and a high-temperature cluster region is obtained.

[0145] The clustering processing refers to a method of forming a plurality of high-temperature cluster regions by judging the positional relationship of the high-temperature regions, and grouping two or more high-temperature regions with overlapping parts into one category and grouping only one high-temperature region into one category. Therefore, the high-temperature cluster region refers to an aggregated region composed of one high-temperature region or a plurality of mutually overlapping high-temperature regions.

[0146] Further, in the judgment of the overlapping part of two or more high-temperature regions with overlapping parts, it is required to satisfy that the area of the overlapping region is greater than the preset percentage of the area of the smaller high-temperature region in the overlapping high-temperature regions. In this embodiment, the preset percentage can be set to 30%.

[0147] Step S404: Based on the maximum temperature value, the area of the region, and the average temperature of each high-temperature cluster region, the cluster priority score is calculated.

[0148] The maximum temperature value refers to the highest temperature in a high-temperature cluster region, reflecting the local extreme heat risk.

[0149] The area of the region refers to the total area of the high-temperature cluster region, wherein the total area can be obtained by adding the areas of a plurality of high-temperature regions and subtracting the area of the overlapping part.

[0150] The average temperature refers to the average temperature in the high-temperature cluster region, reflecting the overall heat intensity.

[0151] The cluster priority score can be calculated by a weighted scoring model. The cluster priority score S is: S=(α*T max +β*T avg +γ*A) / (α+β+γ). Wherein, T max represents the maximum temperature value, and α represents the weight of the maximum temperature value; A represents the area of the region, and γ represents the weight of the area of the region; T avg represents the average temperature, and β represents the weight of the average temperature. α, β, and γ are all preset constants.

[0152] Step S405: The ventilation path is determined based on the priority score, and the ventilation direction is determined based on the ventilation path.

[0153] After obtaining the cluster priority scores, the cluster priority scores of all high-temperature cluster regions are sorted in descending order to obtain a descending sequence set. According to the descending sequence set, the coordinates of the high-temperature cluster regions are obtained in sequence, wherein the bounding boxes of all high-temperature regions in the high-temperature cluster region are merged, and the center of the minimum bounding rectangle after merging is taken as the coordinate of the high-temperature cluster region. The coordinates of several high-temperature cluster regions are added to the descending sequence set, wherein the ventilation path is a path connecting the coordinates of the cluster regions in the descending sequence set in sequence, which is used to guide the rotation adjustment of the spraying joint and the airflow guidance. According to the position distribution of the ventilation path, the path points are mapped to the rotation angle of the spraying joint, so as to determine the ventilation direction.

[0154] By adopting the above technical solutions, when there are multiple high-temperature regions in the covered area, the high-temperature regions are clustered and processed, the cluster priority scores are obtained based on the high-temperature cluster regions, and the ventilation path and the ventilation direction are planned according to the cluster priority scores, so that the rapid response and targeted cooling treatment of the high-temperature regions are realized.

[0155] The embodiment of the application provides a local breakdown phenomenon response method, referring to Figure 5 The method comprises the following steps.

[0156] Step S501: Monitor the current spike signal of the key high-voltage unit, and identify whether there is a local breakdown region according to the current spike signal.

[0157] The current spike signal refers to an abnormal pulse with a short time and a high amplitude in the key high-voltage unit, which is usually caused by local insulation breakdown, discharge, transient arc and the like.

[0158] The local breakdown region refers to a region where the insulation medium at a specific position in the power distribution shelter is locally electrically broken down, which has not developed into a complete fault but has potential safety risks.

[0159] Among them, the high-precision current sensor (such as the Hall current probe) arranged on the key high-voltage unit continuously detects the working current, once the spike feature of the short-time sharp rise and rapid fall in the current waveform is identified, and the preset spike current amplitude threshold and duration threshold are met, it is determined that there is a possibility of local breakdown, and the region where the key high-voltage unit is located is defined as the local breakdown region.

[0160] Step S502: Determine the position of the local breakdown region based on the field strength distribution, the potential data and the electric field disturbance data of the flexible shielding film unit, to obtain the breakdown position.

[0161] The electric field disturbance data of the flexible shielding film unit refers to the interference signal change of the original electric field distribution caused by the flexible shielding film unit in the unfolded state, which is used to back-calculate the position of the electric field anomaly.

[0162] According to the field intensity distribution, a field intensity anomaly concentration area (such as a region where the local field intensity is much higher than the average value) is determined, and a region where the field intensity is greater than a preset field intensity threshold is preliminarily marked to obtain a suspected breakdown region. According to the potential data, a position where the potential difference exceeds a preset balance threshold is marked as a high-risk position, and is matched with the foregoing suspected breakdown region in space to screen out an intersection region where the field intensity and potential are both abnormal. The micro-capacitance sensor array on the flexible shielding film unit can measure the disturbance response of the electric field after unfolding when the flexible shielding film unit is unfolded. If the disturbance feedback of a certain region to the flexible shielding film unit changes greatly (such as the electric field intensity change amplitude being greater than a threshold amplitude value), it indicates that the electric field is concentrated in this region. The high-response region of the membrane disturbance is spatially overlapped with the intersection result of the field intensity and potential to determine the final breakdown position.

[0163] Step S503: Obtain the damage level of the local breakdown region according to the preset damage degree judgment method.

[0164] The preset damage degree judgment method is a comprehensive evaluation method based on temperature evolution data, decomposition gas composition, decomposition gas concentration, local image, and infrared image, which is used to evaluate the damage degree of the local breakdown region to obtain the damage level. This method can refer to the step in the embodiment, which will not be described here. Figure 7

[0165] The damage level refers to the description of the grading result of the damage length of the local breakdown region, including slight damage, moderate damage, and high damage.

[0166] Step S504: In the case of slight damage, control the flexible shielding film to remain in the unfolded state, and add an insulating spraying material to the shielding area in a preset proportion of protective gas.

[0167] Slight damage refers to that the local breakdown region does not cause obvious structural damage or thermal damage, and has the condition of repairing without interrupting power supply.

[0168] The insulating spraying material refers to a solid particle material with good insulation, thermal stability, and adhesion, which can deposit an insulating cover layer on the surface of the local breakdown region to inhibit local electric field intensification and avoid further discharge or breakdown risk. The insulating spraying material is, for example, nano-alumina particles, ceramic-based powder, etc.

[0169] In the process of the step of introducing the protective gas into the shielding area in a preset proportion, the insulating spraying material is introduced into the conveying channel of the protective gas, so that the insulating spraying material can be blown to the local breakdown region. The insulating spraying material can form an insulating cover layer with good adhesion after deposition, effectively isolate the local electric field concentration area, reduce the electric field gradient, inhibit the local discharge behavior, and thus improve the insulation safety margin of the key high-voltage unit.​

[0170] Step S505: In the case of moderate damage, the control key high voltage unit corresponding to the power distribution module is powered off locally, and the standby bypass power supply channel is connected.

[0171] Moderate damage refers to that the local breakdown area has caused preliminary structural damage to the power distribution module, but has not spread to the entire power distribution shelter system, and has the condition of risk isolation through local power-off and bypass switching.

[0172] The standby bypass power supply channel refers to the auxiliary power supply path pre-configured in the power distribution shelter, which can automatically switch when the main power supply path fails, ensuring the continuous power supply of the load.

[0173] For example, the feeder cabinet containing high-voltage contactors and busbars detects a local breakdown phenomenon and evaluates it as moderate damage. The system controls the feeder cabinet circuit breaker to trip and power off, and switches to standby busbar power supply through the tie-in circuit breaker in the tie-in cabinet.

[0174] Step S506: In the case of high damage, control the power distribution shelter to perform global power-off operation.

[0175] High damage refers to that the local breakdown area has caused serious structural damage, thermal damage or complete insulation failure of the key high voltage unit, and there are phenomena such as continuous discharge, carbonization, fire or ablation, which cannot be safely repaired on site and have threatened the safe operation of the entire power distribution shelter system.

[0176] When the local breakdown area reaches the high damage level, the system immediately performs global power-off operation, cuts off the main power supply loop of the power distribution shelter, realizes high voltage isolation, and prevents further expansion, explosion or secondary failure.

[0177] By adopting the above technical scheme, the local breakdown position is quickly located by monitoring the current peak signal and combining the disturbance data of field strength, potential and flexible shielding film, and according to the damage degree, it is divided into light, moderate and high levels, respectively. Differentiated processing strategies such as maintaining power supply and injecting insulation spraying material, local power-off and switching standby bypass power supply channel, and global power-off are corresponded, so as to effectively balance the power supply continuity and insulation safety, and improve the operation stability and risk response ability of the power distribution shelter in special environment.

[0178] Referring to Figure 6 According to the preset damage degree judgment method, the step of obtaining the damage level of the local breakdown area includes:

[0179] Step S601: Collecting temperature evolution data of the local breakdown area, the temperature evolution data including peak temperature, high temperature duration and thermal expansion area.

[0180] The temperature evolution data refers to the temperature change of the local breakdown area from before the breakdown phenomenon occurs to after the breakdown phenomenon occurs. The temperature evolution data can be obtained by an infrared imager, and the temperature data obtained by the infrared imager is saved in a history record. When the local breakdown area occurs, the temperature data is pulled out from the history record, and the temperature data changes with time to form the temperature evolution data.

[0181] The temperature evolution data includes a peak temperature, a high-temperature duration, and a thermal expansion area. The peak temperature refers to the highest temperature value in the temperature evolution data. The high-temperature duration refers to the length of time during which the temperature of the local breakdown area is higher than a preset high-temperature threshold. The thermal expansion area refers to the spatial distribution range of the area whose temperature is higher than the high-temperature threshold, indicating the size of the thermal diffusion range.

[0182] Step S602: Detecting the decomposition gas composition and the decomposition gas concentration of the local breakdown area.

[0183] The decomposition gas refers to the gas composition released after the thermal decomposition or breakdown reaction of the insulation material, cable sheath, or other organic insulation medium under the action of high temperature, ionization, etc. due to the breakdown phenomenon. These gas compositions can include ozone (O3), carbon monoxide (CO), carbon dioxide (CO2), fluorides (such as SF4, CF4), hydrocarbon gases (such as CH4, C2H2), etc.

[0184] The gas sensor array and the micro-chromatographic detection module installed in the power distribution shelter are used to analyze the composition change in the air in the local area in real time. The detection system collects gas samples and identifies the target gas species and its concentration to obtain the decomposition gas composition and the decomposition gas concentration. This information can reflect the damage degree of the insulation material and whether there is a high-temperature carbonization phenomenon.

[0185] For example, if the local breakdown area releases high-concentration CO and a small amount of C2H2, and a relatively high local temperature evolution peak is detected, it can be determined that the insulation material in the area has undergone moderate pyrolysis. If only a small amount of O3 and a slight temperature rise are detected, it can be a mild surface discharge.

[0186] Step S603: Obtaining the local image and the infrared image of the local breakdown area.

[0187] The local image is a structural surface image of the local breakdown area by the camera, reflecting the appearance change (such as discoloration, cracking, ablation) of the local breakdown area.

[0188] The infrared image refers to the temperature distribution image collected by the infrared imager, which is used to present the thermal anomaly of the local breakdown area.

[0189] The local image and the infrared image can be superimposed through an image fusion technology to improve the accuracy of fault positioning and visual judgment.

[0190] Step S604: input the temperature evolution data, the decomposition product gas component, the decomposition product gas concentration, the local image and the infrared image into a preset damage level identification model to output a damage level of the local breakdown area.

[0191] The preset damage level identification model is a model for identifying the damage level of the local breakdown area in the power distribution shelter.

[0192] The input parameters of the preset damage level identification model are the temperature evolution data, the decomposition product gas component, the decomposition product gas concentration, the local image and the infrared image.

[0193] After receiving the temperature evolution data, the decomposition product gas component, the decomposition product gas concentration, the local image and the infrared image, the numerical data is normalized, and the image data is subjected to key texture, edge and hot spot area extraction operation to convert the image data into a feature vector. A fusion neural network model is constructed using PyTorch or TensorFlow, the image data is input into a convolutional neural network (CNN) channel, the temperature and gas concentration data are input into a multi-layer perceptron (MLP) channel, and the two types of features are spliced in the fusion layer and output through a Softmax classifier. The corresponding damage level label, such as “mild damage”, “moderate damage” and “high damage”.

[0194] By using the above technical solution, by collecting the temperature evolution data of the local breakdown area, detecting the decomposition product gas component and concentration, and obtaining the local image and the infrared image, the real state of the fault area can be comprehensively reflected from the heat change, the electrical decomposition product characteristics and the visual image. Combined with the preset damage level identification model, the above multi-modal data is fused to realize intelligent identification and classification of the damage level of the local breakdown area.

[0195] Before adding the insulating spraying material to the predetermined proportion of the protective gas in the covered area, the embodiment of the application provides an insulating spraying material determination method, referring to Figure 7 The method comprises the following steps.

[0196] Step S701: determining the insulating damage type of the current local breakdown area according to the decomposition product gas component of the local breakdown area.

[0197] The insulation damage type refers to the specific insulation material type in the partial breakdown area, such as epoxy resin, polytetrafluoroethylene, silicone rubber, polyimide, etc. Different materials have different gas compositions released at high temperature electrical breakdown due to their different molecular structures, which have material specificity.

[0198] After obtaining the decomposition gas composition, the decomposition gas composition is compared with the preset insulation material decomposition comparison library to identify the corresponding insulation material type, which is the insulation damage type of the current partial breakdown area. The preset insulation material decomposition comparison library refers to the material-gas composition corresponding relationship table established based on the typical decomposition gas composition and its concentration distribution released by different insulation materials under electrical breakdown, high temperature cracking and other fault conditions, which is used for reverse reasoning of the material type. The comparison library can be constructed by experimental sampling, gas chromatography analysis, Fourier infrared spectroscopy (FTIR) and other means, and has material specificity and quantitative / qualitative characteristics of decomposition products.

[0199] For example, if the decomposition gas composition has high concentrations of hydrogen fluoride (HF) and carbon tetrafluoride (CF4), the corresponding material type is polytetrafluoroethylene insulation material.

[0200] Step S702: Determine the insulation spraying material of the corresponding type of the insulation damage type based on the insulation damage type, and obtain the target insulation spraying material.

[0201] The database stores a preset insulation damage type-insulation spraying material comparison table. When the insulation damage type is obtained, the insulation damage type-insulation spraying material comparison table is searched according to the insulation damage type to obtain the insulation spraying material of the corresponding type of the insulation damage type, so as to obtain the target insulation spraying material. The preset insulation damage type-insulation spraying material comparison table refers to a data set with a mapping relationship established in advance according to the typical decomposition product characteristics and physical property differences exhibited by different insulation materials at breakdown or pyrolysis. The comparison table records the one-to-one correspondence between the damage type of a plurality of common insulation materials and the insulation spraying material adapted thereto.

[0202] For example, when it is detected that the main component of the decomposition gas of the partial breakdown area is CF4, C2F6 and other fluorine-containing gases, the insulation material of the partial breakdown area is determined to be PTFE material by searching the preset insulation damage type-insulation spraying material comparison table. The system automatically matches a fluoropolymer-based high insulation spray agent from the insulation spraying material library as the target insulation spraying material, and uses it for subsequent local repair processing.

[0203] Step S703: Determine the damage degree of the current partial breakdown area according to the decomposition gas concentration and the local image.

[0204] The decomposition gas concentration reflects the total amount of gas released by pyrolysis or electrical breakdown of the insulation material in the local breakdown area, and indirectly reflects the damage range and severity; and the local image can be used to judge the physical damage characteristics, thermal diffusion range, color change and other phenomena of the breakdown area, to assist in determining the damage degree.

[0205] The damage degree refers to the further judgment of the specific quantitative characteristics of the damage in the local breakdown area under the premise of mild damage level, such as carbonization depth, surface area size, gas concentration intensity, etc. The amount of insulating sprayed material is used for quantitative control.

[0206] The decomposition gas concentration and the local image are input into a preset damage degree judgment model, and the model outputs the corresponding damage degree level based on historical training samples (including image and decomposition gas concentration pairing data of mild carbonization, crack propagation, moderate carbonization and melting, and severe perforation), such as first damage degree, second damage degree, and third damage degree.

[0207] Step S704: determining the spraying dose of the target insulating sprayed material according to the damage degree.

[0208] The damage degree and the spraying dose are positively correlated, and a linear relationship between the damage degree and the spraying dose is preset. After obtaining the damage degree, the spraying dose of the target insulating sprayed material is obtained according to the linear relationship between the damage degree and the spraying dose.

[0209] By using the above technical solutions, the insulation damage type can be identified based on the decomposition gas composition of the local breakdown area, and then the targeted insulating sprayed material is selected; the damage degree is evaluated by combining the decomposition gas concentration and the local image information, the intelligent control of the spraying dose is realized, the pertinence and effectiveness of the repair of the local breakdown area are improved, the waste of the insulating sprayed material is reduced, and the reliability and operation safety of the power distribution shelter in high altitude environment are enhanced.

[0210] Based on the same inventive concept, the embodiments of the present application provide a power distribution shelter control system in a high altitude environment, comprising:

[0211] The acquisition module is configured to acquire air pressure information, temperature information, working voltage, and field intensity distribution.

[0212] The memory is configured to store the program of the power distribution shelter control method in a high altitude environment.

[0213] The processor can load and execute the program in the memory, and implement the power distribution shelter control method in a high altitude environment.

[0214] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above functional modules is exemplified, and in actual application, the above functions can be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0215] The embodiment of the present application provides a computer readable storage medium, which stores a computer program capable of being loaded by a processor and executing a power distribution shelter control method in a high-altitude environment.

[0216] The computer storage medium includes, for example, a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media capable of storing program codes.

[0217] Based on the same inventive concept, the embodiment of the present application provides an intelligent terminal, which comprises a memory and a processor, and the memory stores a computer program capable of being loaded by the processor and executing a power distribution shelter control method in a high-altitude environment.

[0218] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above functional modules is exemplified, and in actual application, the above functions can be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0219] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Any feature disclosed in the specification (including the abstract and drawings) can be replaced by other equivalent or similar features unless specifically described. That is, each feature is only an example of a series of equivalent or similar features unless specifically described.

Claims

1. A power distribution shelter control method for high altitude environments, characterized by, The method comprises the following steps: obtaining air pressure information and temperature information in the power distribution shelter, and calculating an air density parameter based on the air pressure information and the temperature information; correcting a breakdown voltage threshold according to the air density parameter to obtain a corrected breakdown voltage; obtaining a working voltage of a key high-voltage unit in the power distribution shelter, and calculating a safety margin between the working voltage and the corrected breakdown voltage; determining whether the safety margin is lower than a preset tolerance margin threshold; if yes, reducing the power distribution bus voltage to a safe operation voltage range matched with the safety margin, and reducing the voltage of a preset non-key load unit; obtaining a field intensity distribution of the key high-voltage unit and determining whether there is a low margin area less than a preset lower limit margin based on the field intensity distribution; if yes, performing a field intensity suppression operation on the low margin area according to a preset field intensity suppression method.

2. The method of claim 1, wherein, The step of performing the field intensity suppression operation on the low margin area according to the preset field intensity suppression method comprises the following steps: collecting potential data of the key high-voltage unit; identifying adjacent nodes with a potential difference exceeding a preset balance threshold according to the potential data, and adjusting a coupling state of the adjacent nodes to establish a low-impedance channel between the adjacent nodes; again obtaining the field intensity distribution of the key high-voltage unit and determining whether there is still a low margin area less than the preset lower limit margin based on the field intensity distribution; if yes, controlling a flexible shielding film unit to be unfolded to cover the low margin area to obtain a covered area; introducing a preset proportion of protective gas into the covered area.

3. The method of claim 2, wherein, The method further comprises the following steps: obtaining a temperature distribution of the covered area; identifying an area with a temperature greater than a preset temperature threshold according to the temperature distribution to obtain a high-temperature area; determining a ventilation direction according to the position of the high-temperature area; reducing the temperature of the protective gas according to the temperature of the high-temperature area to obtain a cooled gas; controlling the cooled gas to be introduced into the covered area along the ventilation direction.

4. The control method of the power distribution shelter in a high altitude environment according to claim 3, wherein, The step of determining the ventilation direction according to the position of the high-temperature area comprises the following steps: counting the number of high-temperature areas to obtain a high-temperature area number; in a case where the high-temperature area number is greater than one, sequentially obtaining the area of the high-temperature areas to obtain a high-temperature area; performing clustering processing on the high-temperature areas according to the high-temperature area to obtain high-temperature cluster areas; calculating a cluster priority score based on the maximum temperature value, the area, and the temperature mean value of each high-temperature cluster area; determining a ventilation path based on the priority score and determining the ventilation direction based on the ventilation path.

5. The method of claim 2, wherein, The method further comprises the following steps: monitoring a current spike signal of the key high-voltage unit, and identifying whether there is a local breakdown area according to the current spike signal; determining the position of the local breakdown area based on the field intensity distribution, the potential data, and the electric field disturbance data of the flexible shielding film unit to obtain a breakdown position; obtaining a damage level of the local breakdown area according to a preset damage degree judgment method; in a case where the damage level is slight damage, controlling the flexible shielding film to remain in an unfolded state, and adding an insulating spraying material to the protective gas introduced into the covered area in a preset proportion; in a case where the damage level is moderate damage, controlling a power distribution module corresponding to the high-voltage unit to perform a local power-off operation and access a standby bypass power supply channel; in a case where the damage level is high damage, controlling the power distribution shelter to perform a global power-off operation.

6. The method of claim 5, wherein, The step of obtaining the damage level of the local breakdown area according to the preset damage degree judgment method comprises: collecting temperature evolution data of the local breakdown area, the temperature evolution data comprising a peak temperature, a high-temperature duration and a thermal expansion area; detecting decomposition gas components and decomposition gas concentrations of the local breakdown area; obtaining local images and infrared images of the local breakdown area; inputting the temperature evolution data, the decomposition gas components, the decomposition gas concentrations, the local images and the infrared images into a preset damage level recognition model to output the damage level of the local breakdown area.

7. The method of claim 6, wherein, Before adding the insulating spraying material to the preset proportion of the protective gas in the covered area, the method further comprises: determining the current insulating damage type of the local breakdown area according to the decomposition gas components of the local breakdown area; determining the target insulating spraying material corresponding to the insulating damage type based on the insulating damage type; determining the damage degree of the current local breakdown area according to the decomposition gas concentrations and the local images; determining the spraying dose of the target insulating spraying material according to the damage degree.

8. A power distribution shelter control system for high altitude environments, comprising: The system is used to execute the power distribution shelter control method in a high-altitude environment as claimed in any one of claims 1 to 7, comprising: an acquisition module for acquiring air pressure information, temperature information, working voltage and field intensity distribution; a memory for storing the program of the power distribution shelter control method in a high-altitude environment; a processor, the program in the memory being capable of being loaded and executed by the processor and realizing the power distribution shelter control method in a high-altitude environment.

9. A smart terminal, characterized by comprising a memory and a processor, the memory storing a computer program capable of being loaded and executed by the processor to execute the method as claimed in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, storing a computer program capable of being loaded and executed by the processor to execute the method as claimed in any one of claims 1 to 7.

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