Electric power system regular checking method based on environmental information

Abstract

The invention relates to the technical field of electric power system regular checking, in particular to an electric power system regular checking method based on environmental information, which comprises the following steps: S1, detecting the temperature of a flange at each part of a wind driven generator, and taking the part with higher temperature as a key detection part; s2, detecting and acquiring flange pressure values and temperature data of key detection parts; s3, calculating a pressure threshold value of the flange according to the position and temperature data of the flange; s4, analyzing and judging the loose state of the bolt according to the flange pressure value and the pressure threshold value of each key detection part; s5, adjusting the regular checking date of the power system according to the analysis and judgment result; by monitoring the temperature and the pressure of the flange, the looseness degree of the bolt of the wind driven generator is effectively judged through the pressure value of the flange; the regular checking period is adjusted according to the relaxation proportion, equipment damage caused by untimely regular checking is prevented, and the operation stability of the wind driven generator is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power system regular inspection, and more specifically to a power system regular inspection method based on environmental information. Background Art

[0002] With the development of the wind power industry, the current mainstream maintenance model is dynamic maintenance plus annual regular inspection. Regular inspection work is mostly outsourced, and the time of regular inspection is mostly based on the regular inspection plan and cannot be adjusted according to the actual situation of the wind turbine.

[0003] During the operation of wind turbines, a large amount of heat is generated, which generates high temperatures. Generally speaking, high temperatures will reduce the strength of materials, resulting in a certain degree of relaxation. Bolts will slowly deform when working for a long time at high temperatures, and stress relaxation will also occur. When creep occurs, the length of the bolt will increase, resulting in an increase in the distance between the nuts on both sides of the bolt, the pressure on the flange will decrease, and the sealing performance will decrease; when stress relaxes, elastic deformation will turn into plastic deformation. At this time, due to the reduction in elastic strain, the axial force of the bolt will decrease, the pressure on the flange will also decrease, and the sealing performance will also decrease.

[0004] Under the influence of high temperature, there is a difference in the temperature of the flange and the temperature of the bolt, which leads to different expansion degrees of the flange and the bolt, which can easily affect the tightening of the bolt.

[0005] Therefore, how to adjust the wind turbine inspection period according to the actual situation inside the wind turbine is a problem that technical personnel in this field need to solve urgently. Summary of the invention

[0006] In view of this, the present invention provides a power system regular inspection method based on environmental information. By detecting the flange temperature and pressure, the degree of bolt looseness of the wind turbine is analyzed and predicted, and then the regular inspection cycle of the wind turbine is adjusted to avoid equipment damage caused by untimely regular inspection, thereby improving the stability of wind turbine operation.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] Preferably, the above-mentioned power system regular inspection method based on environmental information includes:

[0009] S1, test the temperature of flanges at various parts of the wind turbine, and focus on the parts with higher temperatures;

[0010] S2, detecting and obtaining flange pressure value and temperature data of the key detection part;

[0011] S3, calculating the pressure threshold of the flange according to the position and temperature data of the flange;

[0012] S4, analyzing and judging the looseness state of the bolts according to the flange pressure value and the pressure threshold of each of the key detection parts;

[0013] S5, adjusting the scheduled inspection date of the power system according to the analysis and judgment results.

[0014] Preferably, in the above-mentioned power system regular inspection method based on environmental information, the pressure threshold of the flange is calculated according to the position and temperature data of the flange, including:

[0015] S31, obtaining historical inspection data of the wind turbine, screening the pressure value of the flange before the historical inspection according to the location of the flange, and generating a pressure value curve that changes with time;

[0016] S32, predicting and analyzing the pressure value of the next scheduled inspection according to the change trend of the pressure value curve to obtain a predicted pressure value and a first predicted time;

[0017] S33, analyzing the current flange temperature data, the predicted pressure value and the predicted time to obtain the flange pressure threshold.

[0018] Preferably, in the above-mentioned power system regular inspection method based on environmental information, the analysis based on the current flange temperature data and the predicted pressure value to obtain the flange pressure threshold value includes:

[0019] S341, acquiring flange temperature change history data, and generating a flange temperature curve that changes with time;

[0020] S342, determining a current temperature change trend in the flange temperature change curve according to the current time node;

[0021] S343, predicting and analyzing the flange temperature change according to the flange temperature change trend and local weather information, and obtaining a flange temperature prediction curve;

[0022] S344, generating a temperature and flange pressure value change correspondence table based on historical data;

[0023] S345, adjusting the first predicted time for the flange to reach the predicted pressure value according to the temperature and flange pressure value change correspondence table, the flange temperature prediction curve and the current flange pressure value to obtain a second predicted time;

[0024] S346, determining a pressure threshold of the flange according to the pressure value curve and the second prediction time.

[0025] Preferably, in the above-mentioned method for regular inspection of a power system based on environmental information, the determining of the loose state of the bolts includes:

[0026] S41, presetting the number of random inspection samples of flanges, uniformly selecting flanges in the key inspection locations, and inspecting the pressure of the flanges;

[0027] S42, comparing and analyzing the detection pressure value of the flange with the pressure threshold of the flange, if the detection pressure value of the flange is less than the pressure threshold, it is determined that the bolts on the flange are in a loose state;

[0028] S43, the number of flanges with loose bolts is counted as the number of low-pressure flanges.

[0029] Preferably, in the above-mentioned method for regular inspection of a power system based on environmental information, the pressure of the flange is detected, including:

[0030] S411, uniformly selecting flanges in the key detection locations of the wind turbine as flanges to be tested, each of the key detection locations having at least one flange to be tested, and numbering the flanges to be tested;

[0031] S412, multiple pressure sensors, whose pressure sensitive elements are arranged below the flange to be tested; multiple temperature sensors, whose detection components are fixedly connected to the portion of the flange to be tested close to the bolts;

[0032] S413, a plurality of signal conversion devices are respectively connected to the pressure sensor and the temperature sensor corresponding to each flange to be tested, one signal conversion device is connected to one pressure sensor and one temperature sensor, and the pressure information and the temperature information are converted into digital information;

[0033] S414, collecting the temperature data and pressure data of all the flanges to be tested into the fan processor through the switch;

[0034] S415, the wind turbine processor transmits the data to the server of the monitoring center through the data transmission device;

[0035] S416, the server presets the corresponding relationship between the pressure sensor and temperature sensor numbers and the flange numbers, presets the flange numbers and the position information of the flanges, and analyzes and judges the data in the server.

[0036] Preferably, in the above-mentioned method for scheduled inspection of a power system based on environmental information, the step of adjusting the scheduled inspection date of the power system according to the analysis and judgment result includes:

[0037] According to the total number of flanges in the key detection parts in the wind turbine and the number of samples, a first quantity threshold and a second quantity threshold are set, wherein the first quantity threshold is smaller than the second quantity threshold;

[0038] If the number of the low-pressure flanges is less than the first number threshold, the scheduled inspection date of the wind turbine remains unchanged;

[0039] If the number of the low-pressure flanges is greater than the first number threshold and less than the second number threshold, the scheduled inspection date is adjusted forward;

[0040] If the number of the low-pressure flanges is greater than the second number threshold, a bolt loosening alarm is generated, and the wind turbine is immediately inspected.

[0041] Preferably, in the above-mentioned method for scheduled inspection of a power system based on environmental information, the step of adjusting the scheduled inspection date forward includes:

[0042] Setting a detection cycle, a fixed detection cycle and an adjustment cycle, wherein the time period of the adjustment cycle is within the fixed detection cycle and is at the end of the fixed detection cycle; the time period of the detection cycle is within the fixed detection cycle and is at the beginning of the fixed detection cycle; the detection cycle and the adjustment cycle do not overlap;

[0043] The timing is started at the beginning of the fixed inspection cycle. If the fixed inspection timing does not reach the time period of the adjustment cycle:

[0044] If the number of the low-pressure flanges is not greater than the first number threshold and less than the second number threshold during the detection period, the fixed inspection timing is performed normally;

[0045] If the number of the low-pressure flanges is greater than the first number threshold and less than the second number threshold during the detection period, the fixed detection timing is adjusted to the beginning of the adjustment period;

[0046] When the fixed inspection timing reaches the time period of the adjustment cycle:

[0047] If the number of the low-pressure flanges is not greater than the first number threshold and less than the second number threshold during the adjustment period, the wind turbine generator is started to be inspected when the inspection timing reaches the inspection period structure, and the inspection timing is reset after the inspection;

[0048] If the number of the low-pressure flanges is greater than the first number threshold and less than the second number threshold during the adjustment period, the wind turbine is immediately inspected and the inspection timer is reset after the inspection.

[0049] Preferably, the above-mentioned power system regular inspection method based on environmental information further includes:

[0050] The server also presets an alarm threshold of the flange. If the detection threshold of the flange is less than the alarm threshold, a relaxation alarm message is generated and the alarm flange is immediately inspected and repaired; wherein the alarm message includes the number and position of the flange.

[0051] It can be seen from the above technical solution that, compared with the prior art, the beneficial effects of the present invention are:

[0052] 1. By monitoring the temperature and pressure of the flange, different pressure thresholds are calculated for flanges in different parts, and the degree of looseness of the bolts of the wind turbine generator can be effectively judged through the pressure value of the flange; and the pressure threshold is corrected and adjusted according to the temperature of the wind turbine generator, which improves the accuracy of bolt judgment. The regular inspection cycle is adjusted according to the relaxation ratio to prevent equipment damage caused by untimely regular inspection, and improve the stability of wind turbine operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0054] Figure 1 The accompanying drawing is a schematic flow diagram of the method of the present invention. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention. The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0056] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0058] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0059] The embodiment of the present invention discloses a method for regular inspection of a power system based on environmental information, comprising:

[0060] S1, test the temperature of flanges at various parts of the wind turbine, and focus on the parts with higher temperatures;

[0061] Among them, the general wind turbine temperature. Temperature range: -40℃~+100℃, the generator is sealed inside the cabin, the temperature of the generator surface is as high as +100℃, making the fixing flange and bolts on the wind turbine easily affected by high temperature. Because of air convection outside the wind turbine, high temperature is generally not generated, so only some high-temperature flanges need to be monitored.

[0062] S2, detect and obtain flange pressure value and temperature data of key detection parts;

[0063] S3, calculating the pressure threshold of the flange according to the position and temperature data of the flange;

[0064] S4, analyzing and judging the loose state of the bolts according to the flange pressure values ​​and pressure thresholds of each key detection position;

[0065] Among them, generally speaking, high temperature will reduce the strength of the material, resulting in a certain degree of relaxation. When the bolt works for a long time at high temperature, it will slowly deform, and stress relaxation will also occur. When creep occurs, the length of the bolt will increase, resulting in an increase in the distance between the nuts on both sides of the bolt, the pressure on the flange will decrease, and the sealing performance will decrease; when stress relaxes, the elastic deformation will turn into plastic deformation. At this time, due to the reduction of elastic strain, the axial force of the bolt will decrease, the pressure on the flange will also decrease, and the sealing performance will also decrease;

[0066] Therefore, in the part of the wind turbine where the temperature is continuously high, the bolts are more likely to loosen, thereby reducing the pressure on the flange. By monitoring the pressure on the flange, the degree of looseness of the bolts can be effectively determined.

[0067] S5, adjusting the scheduled inspection date of the power system according to the analysis and judgment results.

[0068] The beneficial effects of the above embodiment are as follows: by monitoring the temperature and pressure of the flange, different pressure thresholds are calculated for flanges at different locations, and the degree of looseness of the bolts of the wind turbine generator is effectively judged by the pressure value of the flange; and the pressure threshold is corrected and adjusted according to the temperature of the wind turbine generator, thereby improving the accuracy of the bolt judgment. The regular inspection cycle is adjusted according to the relaxation ratio to prevent damage to the equipment caused by untimely regular inspection, thereby improving the stability of the operation of the wind turbine generator.

[0069] Compared with monitoring bolts, monitoring flanges reduces the difficulty of data processing and makes real-time monitoring solutions simpler.

[0070] In one embodiment, a power system inspection method based on environmental information calculates a pressure threshold of a flange according to the position and temperature data of the flange, including:

[0071] S31, obtaining historical inspection data of the wind turbine, screening the pressure value of the flange before the historical inspection according to the location of the flange, and generating a pressure value curve that changes with time;

[0072] S32, predicting and analyzing the pressure value of the next scheduled inspection according to the change trend of the pressure value curve to obtain a predicted pressure value and a first predicted time;

[0073] S33, analyzing the current flange temperature data, the predicted pressure value and the predicted time to obtain the flange pressure threshold.

[0074] In the above embodiment, the pressure value of the flange can be effectively predicted by analyzing the historical data through the mathematical model.

[0075] In one embodiment, a power system regular inspection method based on environmental information analyzes current flange temperature data and predicted pressure values ​​to obtain a flange pressure threshold, including:

[0076] S341, acquiring flange temperature change history data, and generating a flange temperature curve that changes with time;

[0077] S342, determining a current temperature change trend in the flange temperature change curve according to the current time node;

[0078] S343, predicting and analyzing the flange temperature change according to the flange temperature change trend and local weather information, and obtaining a flange temperature prediction curve;

[0079] S344, generating a temperature and flange pressure value change correspondence table based on historical data;

[0080] S345, adjusting the first predicted time for the flange to reach the predicted pressure value according to the temperature and flange pressure value change correspondence table, the flange temperature prediction curve and the current flange pressure value to obtain a second predicted time;

[0081] S346, determining a pressure threshold of the flange according to the pressure value curve and the second prediction time.

[0082] Among them, the pressure value corresponding to the pressure value curve and the second prediction time is the predicted fixed-inspection pressure value, and the pressure threshold value must be smaller than the fixed-inspection pressure value.

[0083] In the above embodiment, the flange temperature is slightly higher than the bolt temperature, and different temperatures have different effects on the flange and bolts. In addition, the impact of weather changes on the fan operation and the actual temperature of the flange is considered, and the temperature change of the flange is predicted, thereby improving the accuracy of the pressure threshold.

[0084] In one embodiment, a power system inspection method based on environmental information determines the loose state of a bolt, including:

[0085] S41, preset the number of random inspection samples of flanges, evenly select flanges from key inspection locations, and inspect the pressure of the flanges;

[0086] S42, comparing and analyzing the detection pressure value of the flange with the pressure threshold of the flange, if the detection pressure value of the flange is less than the pressure threshold, it is determined that the bolts on the flange are in a loose state;

[0087] S43, the number of flanges with loose bolts is counted as the number of low-pressure flanges.

[0088] In the above embodiment, the stress conditions and temperature differences of the flanges at the same part of the wind turbine are very small, so sampling and testing the flanges can reflect the overall situation of the wind turbine.

[0089] In one embodiment, a power system regular inspection method based on environmental information detects the pressure of a flange, including:

[0090] S411, uniformly selecting flanges in key inspection locations of the wind turbine as flanges to be tested, each key inspection location having at least one flange to be tested, and numbering the flanges to be tested;

[0091] S412, multiple pressure sensors, whose pressure sensitive elements are arranged below the flange to be tested; multiple temperature sensors, whose detection components are fixedly connected to the portion of the flange to be tested close to the bolts;

[0092] S413, multiple signal conversion devices are respectively connected to the pressure sensor and temperature sensor corresponding to each flange to be tested, one signal conversion device is connected to one pressure sensor and one temperature sensor, and the pressure information and the temperature information are converted into digital information;

[0093] S414, collecting the temperature data and pressure data of all flanges to be tested into the fan processor through the switch;

[0094] S415, the fan processor transmits the data to the server of the monitoring center through the data transmission device;

[0095] S416, the server presets the corresponding relationship between the pressure sensor and temperature sensor numbers and the flange numbers, presets the flange numbers and the position information of the flanges, and analyzes and judges the data in the server.

[0096] In the above embodiments, the pressure sensor, temperature sensor, signal conversion device, fan processor, and server are all existing technologies and are basic settings for information collection and transmission.

[0097] In one embodiment, a method for scheduled inspection of a power system based on environmental information adjusts the scheduled inspection date of the power system according to the analysis and judgment results, including:

[0098] According to the total number of flanges in the key inspection parts of the wind turbine and the number of samples, a first quantity threshold and a second quantity threshold are set, wherein the first quantity threshold is less than the second quantity threshold;

[0099] If the number of low-pressure flanges is less than the first quantity threshold, the scheduled inspection date of the wind turbine remains unchanged;

[0100] If the number of low-pressure flanges is greater than the first quantity threshold and less than the second quantity threshold, the scheduled inspection date is adjusted forward;

[0101] If the number of low-pressure flanges is greater than the second number threshold, a bolt loosening alarm is generated and the wind turbine is immediately inspected.

[0102] Among them, the scheduled inspection date is adjusted forward, including:

[0103] Set the detection cycle, fixed inspection cycle and adjustment cycle, where the time period of the adjustment cycle is within the fixed inspection cycle and is at the end of the fixed inspection cycle; the time period of the detection cycle is within the fixed inspection cycle and is at the beginning of the fixed inspection cycle; the detection cycle and the adjustment cycle do not overlap;

[0104] The timing starts at the beginning of the regular inspection cycle. If the regular inspection timing does not reach the time period of the adjustment cycle:

[0105] If the number of low-pressure flanges is not greater than the first number threshold and less than the second number threshold during the detection period, the fixed inspection timing is carried out normally;

[0106] If the number of low-pressure flanges in the detection period is greater than the first number threshold and less than the second number threshold, the fixed detection timing is adjusted to the beginning of the adjustment period;

[0107] When the fixed inspection timing reaches the adjustment period:

[0108] If the number of low-pressure flanges is not greater than the first number threshold and less than the second number threshold during the adjustment period, the wind turbine generator will be inspected when the inspection timer reaches the inspection period structure, and the inspection timer will be reset after the inspection.

[0109] If the number of low-pressure flanges is greater than the first quantity threshold and less than the second quantity threshold during the adjustment period, the wind turbine generator is immediately inspected and the inspection timer is reset after the inspection.

[0110] In the above embodiment, by counting the flanges below the pressure threshold, the overall bolt looseness of the wind turbine is reflected. If the first quantity threshold is exceeded, the regular inspection time is advanced and the regular inspection frequency is increased; if the second quantity threshold is exceeded, the regular inspection is performed immediately to reduce the occurrence of equipment damage due to untimely regular inspection and improve the stability of operation.

[0111] In one embodiment, a method for checking a power system based on environmental information further includes:

[0112] The server also presets the alarm threshold of the flange. If the detection threshold of the flange is less than the alarm threshold, a relaxation alarm message is generated and the alarm flange is immediately inspected and repaired; wherein the alarm message includes the number and position of the flange.

[0113] In the above embodiment, the looseness of the bolt is judged by the flange pressure value. When the pressure is too low, it means that there is a problem with the bolt, and the alarm is immediately triggered to perform flange inspection. The number and position of the flange are obtained through the sensor number of the pressure value information source in the server.

[0114] It should be noted that the above embodiments are only illustrated by the division of the above functional modules. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the modules or steps in the embodiments of the present invention can be decomposed or combined. For example, the modules in the above embodiments can be combined into one module, or further divided into multiple sub-modules to complete all or part of the functions described above. The names of the modules and steps involved in the embodiments of the present invention are only for distinguishing the modules or steps, and are not regarded as improper limitations of the present invention.

[0115] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus / device.

[0116] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0117] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations in the above description of the disclosed embodiments, so that professionals and technicians in the field can implement or use the present invention. Various modifications to these embodiments will be obvious to professionals and technicians in the field, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features disclosed herein.

Claims

1. A method for regular inspection of a power system based on environmental information, characterized in that: include: S1, test the temperature of flanges at various parts of the wind turbine, and focus on the parts with higher temperatures; S2, detecting and obtaining flange pressure value and temperature data of the key detection part; S3, calculating the pressure threshold of the flange according to the position and temperature data of the flange; S4, analyzing and judging the looseness state of the bolts according to the flange pressure value and the pressure threshold of each of the key detection parts; S5, adjusting the scheduled inspection date of the power system according to the analysis and judgment results.

2. A method for regular inspection of a power system based on environmental information according to claim 1, characterized in that: The step of calculating the pressure threshold of the flange according to the position and temperature data of the flange includes: S31, obtaining historical inspection data of the wind turbine, screening the pressure value of the flange before the historical inspection according to the location of the flange, and generating a pressure value curve that changes with time; S32, predicting and analyzing the pressure value of the next scheduled inspection according to the change trend of the pressure value curve to obtain a predicted pressure value and a first predicted time; S33, analyzing the current flange temperature data, the predicted pressure value and the predicted time to obtain the flange pressure threshold.

3. The method for regular inspection of a power system based on environmental information according to claim 1, characterized in that: The analysis based on the current flange temperature data and the predicted pressure value to obtain the flange pressure threshold value includes: S341, acquiring flange temperature change history data, and generating a flange temperature curve that changes with time; S342, determining a current temperature change trend in the flange temperature change curve according to the current time node; S343, predicting and analyzing the flange temperature change according to the flange temperature change trend and local weather information, and obtaining a flange temperature prediction curve; S344, generating a temperature and flange pressure value change correspondence table based on historical data; S345, adjusting the first predicted time for the flange to reach the predicted pressure value according to the temperature and flange pressure value change correspondence table, the flange temperature prediction curve and the current flange pressure value to obtain a second predicted time; S346, determining a pressure threshold of the flange according to the pressure value curve and the second prediction time.

4. The method for regular inspection of a power system based on environmental information according to claim 2, characterized in that: The determining of the loose state of the bolt includes: S41, presetting the number of random inspection samples of flanges, uniformly selecting flanges in the key inspection locations, and inspecting the pressure of the flanges; S42, comparing and analyzing the detection pressure value of the flange with the pressure threshold of the flange, if the detection pressure value of the flange is less than the pressure threshold, it is determined that the bolts on the flange are in a loose state; S43, the number of flanges with loose bolts is counted as the number of low-pressure flanges.

5. A method for regular inspection of a power system based on environmental information according to claim 4, characterized in that: The detecting of the pressure of the flange comprises: S411, uniformly selecting flanges in the key detection locations of the wind turbine as flanges to be tested, each of the key detection locations having at least one flange to be tested, and numbering the flanges to be tested; S412, multiple pressure sensors, whose pressure sensitive elements are arranged below the flange to be tested; multiple temperature sensors, whose detection components are fixedly connected to the portion of the flange to be tested close to the bolts; S413, a plurality of signal conversion devices are respectively connected to the pressure sensor and the temperature sensor corresponding to each flange to be tested, one signal conversion device is connected to one pressure sensor and one temperature sensor, and the pressure information and the temperature information are converted into digital information; S414, collecting the temperature data and pressure data of all the flanges to be tested into the fan processor through the switch; S415, the wind turbine processor transmits the data to the server of the monitoring center through the data transmission device; S416, the server presets the corresponding relationship between the pressure sensor and temperature sensor numbers and the flange numbers, presets the flange numbers and the position information of the flanges, and analyzes and judges the data in the server.

6. A method for regular inspection of a power system based on environmental information according to claim 4, characterized in that: The step of adjusting the scheduled inspection date of the power system according to the analysis and judgment results includes: According to the total number of flanges in the key detection parts in the wind turbine and the number of samples, a first quantity threshold and a second quantity threshold are set, wherein the first quantity threshold is smaller than the second quantity threshold; If the number of the low-pressure flanges is less than the first number threshold, the scheduled inspection date of the wind turbine remains unchanged; If the number of the low-pressure flanges is greater than the first number threshold and less than the second number threshold, the scheduled inspection date is adjusted forward; If the number of the low-pressure flanges is greater than the second number threshold, a bolt loosening alarm is generated, and the wind turbine is immediately inspected.

7. A method for regular inspection of a power system based on environmental information according to claim 6, characterized in that: The adjustment of the scheduled inspection date forward includes: Setting a detection cycle, a fixed detection cycle and an adjustment cycle, wherein the time period of the adjustment cycle is within the fixed detection cycle and is at the end of the fixed detection cycle; the time period of the detection cycle is within the fixed detection cycle and is at the beginning of the fixed detection cycle; the detection cycle and the adjustment cycle do not overlap; The timing is started at the beginning of the fixed inspection cycle. If the fixed inspection timing does not reach the time period of the adjustment cycle: If the number of the low-pressure flanges is not greater than the first number threshold and less than the second number threshold during the detection period, the fixed inspection timing is performed normally; If the number of the low-pressure flanges is greater than the first number threshold and less than the second number threshold during the detection period, the fixed detection timing is adjusted to the beginning of the adjustment period; When the fixed inspection timing reaches the time period of the adjustment cycle: If the number of the low-pressure flanges is not greater than the first number threshold and less than the second number threshold during the adjustment period, the wind turbine generator is started to be inspected when the inspection timing reaches the inspection period structure, and the inspection timing is reset after the inspection; If the number of the low-pressure flanges is greater than the first number threshold and less than the second number threshold during the adjustment period, the wind turbine is immediately inspected and the inspection timer is reset after the inspection.

8. The method for regular inspection of a power system based on environmental information according to claim 5, characterized in that: Also includes: The server also presets an alarm threshold of the flange. If the detection threshold of the flange is less than the alarm threshold, a relaxation alarm message is generated, and the alarm flange is immediately inspected and repaired; wherein the alarm message includes the number and position of the flange.

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