Extreme environment adaptability test method for power transmission and transformation sensing terminal

Abstract

An extreme environment adaptability test method for a power transmission and transformation sensing terminal relates to the technical field of equipment testing, and specifically comprises the following steps: constructing a coupled control model comprising a static test mode and a dynamic test mode, and inputting a target altitude to the coupled control model; based on the target altitude, a static test mode of a coupled control model is adopted, the comprehensive test bin is controlled to test the power transmission and transformation sensing terminal, and a test result is obtained; if the test result is that the power transmission and transformation sensing terminal is unqualified, the terminal is a defective product; if the test result is that the power transmission and transformation sensing terminal is qualified, controlling the comprehensive test bin to test the power transmission and transformation sensing terminal by adopting a dynamic test mode of a coupled control model; if the test result is that the power transmission and transformation sensing terminal is unqualified, the terminal is a defective product; if the test result is that the power transmission and transformation sensing terminal is qualified, the product is a good product; the problems that traditional testing is low in efficiency and inaccurate in testing result are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment testing, and in particular to a method for testing the extreme environment adaptability of a power transmission and transformation sensor terminal. Background Art

[0002] Ultra-high altitude areas refer to areas with an altitude of 3500-5500 meters. Their natural climate conditions are usually harsh. In addition, these areas have low air density and air pressure, low air temperature, large fluctuations in ambient temperature, low absolute humidity, high solar radiation intensity, low precipitation, frequent strong winds, very low soil temperature and long permafrost periods. As a result, the natural environment in ultra-high altitude areas is extremely complex, with low air pressure (≤70kPa), strong ultraviolet radiation (≥1000W / m 2 ), dramatic temperature differences between day and night (-40℃~70℃), frequent strong winds (wind speed ≥15m / s) and freeze-thaw cycles.

[0003] Due to the complex environment in ultra-high altitude areas, it is still unclear which performance of the sensor terminals of power transmission and transformation equipment is affected, and the reliability impact mechanism under the superposition of extreme environments is missing. The test severity levels of existing general standards for electrical and electronic environmental testing such as GB / T2421 and IEC60068 do not match the ultra-high altitude environment.

[0004] As the core equipment for grid status perception, power transmission and transformation sensor terminals are prone to the following key problems when exposed to such environments for a long time:

[0005] 1) Degradation of material properties: Low air pressure increases the pressure difference between the inside and outside of the sealed structure, accelerating the failure of the airtightness of the insulation material; strong ultraviolet radiation causes photooxidative aging of the shell and a decrease in mechanical strength; large temperature difference cycles lead to differences in the thermal expansion coefficients of metal parts.

[0006] 2) Abnormal electrical characteristics: Under low pressure, the insulation strength of air decreases, the starting voltage of local discharge at the sensor terminal decreases, and the risk of insulation failure increases sharply; under low temperature environment, the capacitance attenuation, crystal oscillator frequency drift, impedance change, etc., lead to reduced signal acquisition accuracy.

[0007] 3) Insufficient adaptability to working conditions: Existing test standards (such as GB / T 2421 and IEC 60068) are only for general electronic equipment. Their single environmental factor (such as temperature or humidity alone) test mode cannot simulate the multi-stress coupling effects of ultra-high altitude (such as low pressure + ultraviolet rays + strong wind simultaneous loading).

[0008] Traditionally, multiple test chambers are used to test power transmission and transformation sensor terminals, with each chamber responsible for testing different environmental factors. However, this method requires frequent transportation of the power transmission and transformation sensor terminals, which affects test efficiency. Furthermore, certain environmental factors in ultra-high altitude areas can combine to create greater hazards, and current testing methods are unable to test coupled environments, thus affecting the accuracy of the final test results.

[0009] Therefore, we propose a testing method with high testing efficiency and accurate test results. Summary of the Invention

[0010] The object of the present invention is to provide a method for testing the extreme environment adaptability of a power transmission and transformation sensor terminal, which is used to solve the problems of low efficiency and inaccurate test results of traditional tests.

[0011] The present invention is achieved through the following technical solutions:

[0012] A method for testing the extreme environment adaptability of a power transmission and transformation sensor terminal, specifically comprising:

[0013] Constructing a coupled control model including a static test mode and a dynamic test mode, and inputting a target altitude into the coupled control model;

[0014] Based on the target altitude, the static test mode of the coupled control model is used to control the integrated test chamber to test the power transmission and transformation sensor terminals and obtain the test results.

[0015] If the test result shows that the power transmission and transformation sensor terminal fails to meet the standards, it is a defective product;

[0016] If the test result shows that the power transmission and transformation sensor terminal is qualified, the dynamic test mode of the coupled control model is used to control the comprehensive test chamber to test the power transmission and transformation sensor terminal;

[0017] If the test result shows that the power transmission and transformation sensor terminal fails to meet the standards, it is a defective product;

[0018] If the test result shows that the power transmission and transformation sensor terminal is qualified, it is a good product.

[0019] Furthermore, the static test mode of the coupled control model has the following specific process:

[0020] Obtain target air pressure based on target altitude, and calculate target temperature based on target air pressure;

[0021] Determine whether the target altitude is within the range of ultra-high altitude areas;

[0022] If not, based on the target air pressure and target temperature, the integrated test chamber is controlled to perform a dynamic cycle test on the power transmission and transformation sensor terminal to obtain the test results;

[0023] If so, the target UV intensity is calculated based on the target air pressure and the target wind speed is set;

[0024] Based on the target air pressure, target temperature, target ultraviolet intensity and target wind speed, the comprehensive test chamber is controlled to perform dynamic cycle testing on the power transmission and transformation sensor terminal to obtain test results.

[0025] Furthermore, the target temperature is calculated as follows:

[0026] T=T0-k(P0-P)

[0027] Where T0 is the reference temperature, P0 is the reference pressure, P is the target pressure, and k is the correction coefficient.

[0028] Furthermore, the target ultraviolet intensity UV is calculated as follows:

[0029] UV=UV0*(P0 / P)

[0030] Where UV0 is the reference ultraviolet intensity.

[0031] Furthermore, the dynamic test mode of the coupled control model has the following specific process:

[0032] Obtain historical environmental data for ultra-high altitude areas;

[0033] Determine the distribution of extreme environments in time series based on historical data;

[0034] Combine the time series distribution of extreme environments and historical data to generate test parameter combinations;

[0035] The parameter combination is input into the dynamic test module to obtain the adaptability test results of the power transmission and transformation sensor terminal.

[0036] Furthermore, the historical environmental data is:

[0037]

[0038] where t i is the timestamp, H target is the altitude, P obs (t i ),T obs (t i ),UV obs (t i ),V obs (t i ),RH obs (t i ) are extracted from the meteorological database. iThe measured air pressure, temperature, UV intensity, wind speed and relative humidity at all times.

[0039] Furthermore, the distribution of each extreme environment in the time series is determined based on historical data, and the specific steps are as follows:

[0040] Define the thresholds for each environmental parameter;

[0041] The historical data set is binary labeled according to the threshold to obtain the time series distribution of extreme environments.

[0042] Furthermore, the test parameter combination is generated by combining the time series distribution of the extreme environment and historical data. The specific steps are as follows:

[0043] According to the temporal distribution of extreme environments, the longest-lasting extreme event window is calculated;

[0044] According to historical environmental data and extreme event windows, the test parameter values ​​of air pressure, temperature, ultraviolet intensity and wind speed are calculated respectively to form a test parameter sequence.

[0045] Furthermore, the dynamic test module includes environmental loading functions such as air pressure control, temperature cycle, ultraviolet loading and wind speed control.

[0046] The environmental loading function of air pressure control is:

[0047]

[0048] Where P k is the test parameter value of air pressure, ΔP is the amplitude of air pressure fluctuation;

[0049] The environmental loading function for the temperature cycle is:

[0050]

[0051] Where, T min,k is the minimum test parameter value of temperature, T max,k is the maximum test parameter value of temperature, τ T is the temperature cycle period;

[0052] The environmental loading function of UV intensity is:

[0053] UV(t)=UV k ·e -κt

[0054] Where, UV k is the test parameter value of ultraviolet intensity, κ is the ultraviolet attenuation rate;

[0055] The environmental loading function of wind speed is:

[0056] V(t)=V k ·[1+σ V randn(t)]

[0057] Where V k is the test parameter value of wind speed, σ V is the random disturbance intensity of wind speed, and randn(·) is the function that generates the matrix of standard normal distribution.

[0058] Furthermore, the dynamic test module also includes a freeze-thaw cycle test, and the triggering condition of the freeze-thaw cycle test is: min(T k )≤-20℃, and humidity RH k ≥60%;

[0059] The loading function for the freeze-thaw cycle test is:

[0060]

[0061] Where v hT is the heating rate, v dT is the cooling rate;

[0062] The freeze-thaw cycle test was performed 50 times, each lasting 2 hours.

[0063] The technical solution of the present invention has at least the following advantages and beneficial effects:

[0064] The present invention discloses a method for testing the extreme environment adaptability of a power transmission and transformation sensor terminal. By using dual testing in static and dynamic test modes, the accuracy of the test results can be effectively improved, ensuring that the power transmission and transformation sensor terminal that passes the test can maintain good operating performance in ultra-high altitude areas.

[0065] In addition, the comprehensive test chamber used in this method integrates the functions of air pressure adjustment, temperature adjustment, ultraviolet intensity adjustment, wind speed adjustment and relative humidity adjustment. Various environmental tests on the power transmission and transformation terminal can be met through one test chamber, thereby reducing the number of times the power transmission and transformation sensor terminal is transferred during the test process, thereby improving the test efficiency of the power transmission and transformation sensor terminal, and can also eliminate the mechanical stress interference caused by traditional multi-chamber transfer. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 A schematic flow chart of a method of the present invention is shown;

[0067] Figure 2 A schematic diagram of an operation flow of the present invention;

[0068] Figure 3 This is a schematic diagram of the static test mode operation flow of the coupled control model of the present invention. DETAILED DESCRIPTION

[0069] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0070] Example 1

[0071] like Figure 1-Figure 2 A test method for extreme environment adaptability of a power transmission and transformation sensor terminal is shown, specifically including:

[0072] Constructing a coupled control model including a static test mode and a dynamic test mode, and inputting a target altitude into the coupled control model;

[0073] Based on the target altitude, the static test mode of the coupled control model is used to test the power transmission and transformation sensor terminals and obtain the test results;

[0074] If the test result shows that the power transmission and transformation sensor terminal fails to meet the standards, it is a defective product;

[0075] If the test result shows that the power transmission and transformation sensor terminal is qualified, the dynamic test mode of the coupled control model is adopted;

[0076] If the test result shows that the power transmission and transformation sensor terminal fails to meet the standards, it is a defective product;

[0077] If the test result shows that the power transmission and transformation sensor terminal is qualified, it is a good product.

[0078] That is, only after the power transmission and transformation sensor terminals have passed the dynamic test mode and static test mode of the coupled control model in this method can they be used as good products in ultra-high altitude areas, which greatly ensures the accuracy of the test results;

[0079] It should be noted that whether the test results of the power transmission and transformation sensor terminal are qualified is determined by the following conditions: the power transmission and transformation sensor terminal operates in the corresponding simulated environment given by the test chamber, and determines whether the operating parameters of the power transmission and transformation sensor terminal are standard values. If so, it means that the power transmission and transformation sensor terminal can operate normally in the simulated environment, that is, the power transmission and transformation sensor terminal is a qualified product. If not, it means that the power transmission and transformation sensor terminal cannot operate normally in the simulated environment, that is, the power transmission and transformation sensor terminal is an unqualified product.

[0080] Example 2

[0081] As an example, Figure 3 As shown, the static test mode of the coupled control model has the following specific process:

[0082] Obtain target air pressure based on target altitude, and calculate target temperature based on target air pressure;

[0083] The target air pressure can be given by the staff's experience combined with the target altitude, or it can be retrieved from the altitude-air pressure comparison table;

[0084] Specifically, the target temperature is calculated as:

[0085] T=T0-k(P0-P)

[0086] Where T0 is the reference temperature, P0 is the reference pressure, P is the target pressure, and k is the correction coefficient;

[0087] In addition, 1) the value of the reference temperature (T0):

[0088] A) Standard Definition: T0 = 25°C. This is a common reference temperature for power equipment testing (e.g., "normal temperature" in IEC 60068 is defined as 15°C to 35°C, with 25°C being the median).

[0089] B) Dynamic association (recommended): T0 is bound to the initial test conditions. For example, if the ambient temperature of the equipment is 10°C at the beginning of the test, set T0 = 10°C to make the formula dynamically adapt to the current working conditions.

[0090] C) Special scenarios such as extreme climate simulation: If you need to simulate extremely cold and high altitude conditions, you can set T0 to a lower value (such as -10°C) to amplify the temperature difference effect.

[0091] 2) Reference air pressure (P0) value

[0092] A) Standard Definition: P0 = 101.325 kPa. Standard pressure at sea level (corresponding to an altitude of 0 meters) as defined by the International Standard Atmosphere (ISA).

[0093] B) Adjusting the Air Pressure: If the target test area has a specific benchmark (such as the average air pressure in a region), you can customize P0. For example, in Lhasa (3650 meters above sea level, with an average annual pressure of approximately 65.2 kPa), you can use P0 = 65.2 kPa to adapt the formula to local testing.

[0094] 3) Case: Simulated 5000m altitude test

[0095] A) Standard value (P0 = 101.325 kPa, T0 = 25 °C, k = 0.6 °C / kPa)

[0096] Target air pressure P = 54kPa (corresponding value at 5000 meters)

[0097] Calculated temperature: T = 25_0.6 × (101.325_54) = _3.4°C

[0098] Result: Compared with the theoretical temperature of 25℃ at 0 meters, the theoretical temperature of -4.8℃ at 5000 meters deviates by 1.4℃, which is within the allowable range of the project.

[0099] B) Custom value (P0 = 65kPa, T0 = 15°C, k = 0.6°C / kPa)

[0100] Target air pressure P = 54kPa (corresponding value at 5000 meters)

[0101] Calculated temperature: T = 15_0.6 × (65_54) = 15_6.6 = 8.4°C

[0102] Results: It can be used to simulate plateau summer scenes (such as daytime temperature).

[0103] Determine whether the target altitude is within the range of ultra-high altitude areas;

[0104] If not, based on the target air pressure and target temperature, the integrated test chamber is controlled to perform a dynamic cycle test on the power transmission and transformation sensor terminal to obtain the test results;

[0105] If so, the target UV intensity is calculated based on the target air pressure and the target wind speed is set;

[0106] In particular, the target ultraviolet intensity UV is calculated as follows:

[0107] UV=UV0*(P0 / P)

[0108] Wherein, UV0 is the reference ultraviolet intensity;

[0109] In addition, 3) the value of UV0:

[0110] The maximum irradiance of the UV light module UV0 is configurable, and the default value is 550W / m 2 (Corresponding to sea level), high-altitude UV intensity simulation is achieved through proportional adjustment of air pressure. Users can customize UV0 based on test area meteorological data or equipment material weather resistance level.

[0111] 4) Case:

[0112] Simulate the Nagqu area of ​​Tibet (4500 meters above sea level, air pressure 50.44)

[0113] Set UV0 = 550W / m 2 (sea level), calculate:

[0114] UV=550×(101.325 / 50.44)≈1105W / m2;

[0115] Based on the target air pressure, target temperature, target UV intensity and target wind speed, the integrated test chamber is controlled to perform dynamic cycle testing on the power transmission and transformation sensor terminal to obtain the test results;

[0116] Although the static test mode can also realize the coupled test between air pressure, temperature, ultraviolet intensity and wind speed, the selection of test parameters is relatively fixed. Therefore, it is carried out as a preliminary test of the coupled test model to preliminarily judge whether the power transmission and transformation sensor terminal is qualified or not.

[0117] Example 3

[0118] As an embodiment, the dynamic test mode of the coupled control model has the following specific process:

[0119] Obtain historical environmental data for ultra-high altitude areas;

[0120] In particular, the historical environmental data is:

[0121]

[0122] where t i ∈(1,n) is the timestamp, H target is the altitude, P obs (t i ),T obs (t i ),UV obs (t i ),V obs (t i ),RH obs (t i ) are extracted from the meteorological database. i The measured air pressure, temperature, UV intensity, wind speed and relative humidity at all times;

[0123] Determine the distribution of extreme environments in time series based on historical data;

[0124] Specifically: define the threshold value of each environmental parameter;

[0125] The pressure threshold P threshold =70kPa, temperature threshold T threshold =[-40℃,70℃], UV threshold value UV threshold =1000W / m 2 , wind speed threshold V threshold =15m / s;

[0126] Perform binary labeling on the historical data set according to the threshold to obtain the time series distribution of extreme environments;

[0127] The binary mark processing formula is:

[0128]

[0129] in,

[0130]

[0131] Where X is air pressure, temperature, ultraviolet intensity or wind speed, and T(t i )≥T threshold , expressed as T(t i )≥70℃.

[0132] Combine the time series distribution of extreme environments and historical data to generate test parameter combinations;

[0133] In particular, based on the temporal distribution of extreme environments, the extreme event window with the longest duration is calculated;

[0134] The calculation formula is:

[0135]

[0136] Where Δt is the sliding time window, t a ,t b are the two endpoints of the window;

[0137] Based on historical environmental data and extreme event windows, the test parameter values ​​of air pressure, temperature, ultraviolet intensity and wind speed are calculated respectively to form a test parameter sequence;

[0138] The air pressure test parameter values ​​are:

[0139]

[0140] The temperature test parameter values ​​are:

[0141]

[0142] The UV intensity test parameter values ​​are:

[0143]

[0144] The wind speed test parameter values ​​are:

[0145]

[0146] Where, α P , β UV and γ V All are reinforcement coefficients, and are 0.95, 1.05 and 1.1 respectively.

[0147] Input the parameter combination into the dynamic test module to obtain the adaptability test results of the power transmission and transformation sensor terminal;

[0148] The dynamic testing module includes environmental loading functions for air pressure control, temperature cycling, UV loading, and wind speed control. Each environmental loading function converts the temporal characteristics of extreme environmental profiles into physical control signals for the test chamber, enabling high-precision laboratory replication of the ultra-high-altitude real-world environment.

[0149] The environmental loading function of air pressure control is:

[0150]

[0151] Where P k is the test parameter value of air pressure, ΔP is the air pressure fluctuation amplitude, which is 5kPa;

[0152] The environmental loading function for the temperature cycle is:

[0153]

[0154] Where, T min,k is the minimum test parameter value of temperature, T max,k is the maximum test parameter value of temperature, τ T is the temperature cycle period, which is 12h;

[0155] The environmental loading function of UV intensity is:

[0156] UV(t)=UV k ·e -kt

[0157] Where, UV k is the test parameter value of ultraviolet intensity, κ is the ultraviolet attenuation rate, which is 0.05;

[0158] The environmental loading function of wind speed is:

[0159] V(t)=V k ·[1+σ V randn(t)]

[0160] Where V k is the test parameter value of wind speed, σ V is the random perturbation intensity of wind speed, which is 0.2, and randn(·) is the function that generates the matrix of standard normal distribution.

[0161] According to the needs, the dynamic test module also includes a freeze-thaw cycle test, and the triggering condition of the freeze-thaw cycle test is: min(T k )≤-20℃, and humidity RH k ≥60%;

[0162] The loading function for the freeze-thaw cycle test is:

[0163]

[0164] Where v hT is the heating rate, v dT is the cooling rate;

[0165] The freeze-thaw cycle test was performed 50 times, each lasting 2 hours.

[0166] The parameter combination driven by historical data can accurately reproduce the multi-stress coupling time series characteristics at ultra-high altitudes; the strengthening coefficient and freeze-thaw cycle test can achieve equivalent accelerated testing, and a one-week test can simulate one year of actual damage.

[0167] Example 4

[0168] A test system for extreme environment adaptability of a power transmission and transformation sensor terminal includes a coupled control model and a comprehensive test chamber; the coupled control model includes a static test mode unit and a dynamic test mode unit,

[0169] The static test mode unit includes a data input module, a data calculation module, and a first control module. The data input module is used to input target altitude data, target air pressure data, and target wind speed data. The data calculation module is used to calculate target temperature data and target ultraviolet intensity data. The first control module is used to control the corresponding air pressure control unit, temperature and humidity control unit, ultraviolet illumination unit, and air circulation unit in the comprehensive test chamber according to the target air pressure, target temperature, target ultraviolet intensity, and target wind speed, so that the comprehensive test chamber achieves a simulated environment that meets the target air pressure, target temperature, target ultraviolet intensity, and target wind speed requirements.

[0170] The dynamic test mode unit includes a data acquisition module, a time series calculation module, a test parameter combination generation module, and a dynamic test module, wherein the data acquisition module is used to obtain historical environmental data of ultra-high altitude areas; the time series calculation module is used to determine the distribution of each extreme environment in the time series based on historical data; the test parameter combination generation module is used to combine the time series distribution of the extreme environment and historical data to generate a test parameter combination; the dynamic test module is used to control the corresponding air pressure control unit, temperature and humidity control unit, ultraviolet light unit, and air circulation unit in the comprehensive test chamber according to the test parameter combination, so that the comprehensive test chamber achieves the simulated environment required by the test parameter combination;

[0171] The integrated test chamber includes an air pressure control unit, a temperature and humidity control unit, an ultraviolet light unit, and an air circulation unit. The air pressure control unit needs to be controlled in conjunction with the air circulation unit to ensure that the chamber is sealed. The fan speed is dynamically adjusted according to the internal air pressure of the chamber to ensure that the airflow disturbance intensity matches the altitude, achieving ultra-high altitude simulation.

[0172] The temperature and humidity control unit has a mature solution for temperature control on the market, which can be directly adopted. When no temperature shock test is performed, the valves of both cavities can be opened. However, when performing a temperature shock test, only one cavity valve is opened at the same time. When high temperature is required, the high-temperature cavity is used for preheating, and when low temperature is required, the low-temperature cavity is used for precooling. In actual use, such as low-temperature shock test: ensure that the test cavity is 50°C, pre-cool the low-temperature cavity to 0°C, and then close the high-temperature cavity valve and open the low-temperature cavity valve to achieve low-temperature shock;

[0173] The UV illumination unit is embedded with a multi-band LED array at the top of the test chamber, covering the UVA (315-400nm) and UVB (280-315nm) spectra to simulate the strong UV rays at high altitudes. A quartz glass isolation layer is used to block the heat of the UV light source to avoid interfering with the temperature control accuracy inside the chamber.

[0174] The air circulation unit utilizes the side opening of the test chamber to add a detachable air guide cover, which is connected to an external pressurized fan to form a closed-loop airflow to achieve high wind speed simulation.

[0175] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A method for testing the extreme environment adaptability of a power transmission and transformation sensor terminal, characterized in that: Specifically include: Constructing a coupled control model including a static test mode and a dynamic test mode, and inputting a target altitude into the coupled control model; Based on the target altitude, the static test mode of the coupled control model is used to control the integrated test chamber to test the power transmission and transformation sensor terminals and obtain the test results. If the test result shows that the power transmission and transformation sensor terminal fails to meet the standards, it is a defective product; If the test result shows that the power transmission and transformation sensor terminal is qualified, the dynamic test mode of the coupled control model is used to control the comprehensive test chamber to test the power transmission and transformation sensor terminal; If the test result shows that the power transmission and transformation sensor terminal fails to meet the standards, it is a defective product; If the test result shows that the power transmission and transformation sensor terminal is qualified, it is a good product.

2. The extreme environment adaptability testing method of a power transmission and transformation sensor terminal according to claim 1 is characterized in that: The static test mode of the coupled control model has the following specific process: Obtain target air pressure based on target altitude, and calculate target temperature based on target air pressure; Determine whether the target altitude is within the range of ultra-high altitude areas; If not, based on the target air pressure and target temperature, the coupled test chamber is controlled to perform a dynamic cycle test on the power transmission and transformation sensor terminal to obtain the test results; If so, the target UV intensity is calculated based on the target air pressure and the target wind speed is set; Based on the target air pressure, target temperature, target ultraviolet intensity and target wind speed, the coupled test chamber is controlled to perform dynamic cycle testing on the power transmission and transformation sensor terminal to obtain test results.

3. The extreme environment adaptability testing method of a power transmission and transformation sensor terminal according to claim 2, characterized in that: The target temperature is calculated as follows: T=T0-k(P0-P) Where T0 is the reference temperature, P0 is the reference pressure, P is the target pressure, and k is the correction coefficient.

4. The extreme environment adaptability testing method of a power transmission and transformation sensor terminal according to claim 2 is characterized in that: The calculation formula of the target ultraviolet intensity UV is: UV=UV0*(P0 / P) Where UV0 is the reference ultraviolet intensity.

5. The extreme environment adaptability testing method of a power transmission and transformation sensor terminal according to claim 1 is characterized in that: The dynamic test mode of the coupled control model has the following specific process: Obtain historical environmental data for ultra-high altitude areas; Determine the distribution of extreme environments in time series based on historical data; Combine the time series distribution of extreme environments and historical data to generate test parameter combinations; The parameter combination is input into the dynamic test unit to obtain the adaptability test results of the power transmission and transformation sensor terminal.

6. The extreme environment adaptability testing method of a power transmission and transformation sensor terminal according to claim 5, characterized in that: The historical environmental data are: where t i is the timestamp, H target is the altitude, P obs (t i ),T obs (t i ),UV obs (t i ),V obs (t i ),RH obs (t i ) are extracted from the meteorological database. i The measured air pressure, temperature, UV intensity, wind speed and relative humidity at all times.

7. The extreme environment adaptability testing method of a power transmission and transformation sensor terminal according to claim 5, characterized in that: The specific steps of determining the distribution of each extreme environment in the time series based on historical data are as follows: Define the thresholds for each environmental parameter; The historical data set is binary labeled according to the threshold to obtain the time series distribution of extreme environments.

8. The extreme environment adaptability testing method of a power transmission and transformation sensor terminal according to claim 5, characterized in that: The specific steps of combining the time series distribution of extreme environments and historical data to generate a test parameter combination are as follows: According to the temporal distribution of extreme environments, the longest-lasting extreme event window is calculated; According to historical environmental data and extreme event windows, the test parameter values ​​of air pressure, temperature, ultraviolet intensity and wind speed are calculated respectively to form a test parameter sequence.

9. The extreme environment adaptability testing method of a power transmission and transformation sensor terminal according to claim 8, characterized in that: The dynamic test unit includes environmental loading functions such as air pressure control, temperature cycle, UV loading and wind speed control. The environmental loading function of air pressure control is: Where P k is the test parameter value of air pressure, ΔP is the amplitude of air pressure fluctuation; The environmental loading function for the temperature cycle is: Where, T min,k is the minimum test parameter value of temperature, T max,k is the maximum test parameter value of temperature, τ T is the temperature cycle period; The environmental loading function of UV intensity is: UV(t)=UV k ·e -kt Where, UV k is the test parameter value of ultraviolet intensity, κ is the ultraviolet attenuation rate; The environmental loading function of wind speed is: V(t)=V k ·[1+σ V ·randn(t)] Where V k is the test parameter value of wind speed, σ V is the random disturbance intensity of wind speed, and randn(·) is the function that generates the matrix of standard normal distribution.

10. The extreme environment adaptability testing method of a power transmission and transformation sensor terminal according to claim 9, characterized in that: The dynamic test unit also includes a freeze-thaw cycle test, and the triggering condition of the freeze-thaw cycle test is: min(T k )≤-20℃, and humidity RH k ≥60%; The loading function for the freeze-thaw cycle test is: Where v hT is the heating rate, v dT is the cooling rate; The freeze-thaw cycle test was performed 50 times, each lasting 2 hours.

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