Safety status monitoring method and system for high voltage power supply terminal

Abstract

The present application relates to the technical field of high-voltage power supply terminal monitoring, and specifically to a method and system for monitoring the safety status of high-voltage power supply terminals, the method comprising: obtaining current data of the high-voltage power supply terminal connection line and temperature data of the terminal; dividing each rising process, falling process and constant process to obtain square wave impact current and non-square wave impact current; analyzing the steepness of current change in the rising and falling processes and the degree of deviation of current data in the constant process to obtain the current impact coefficient, construct the current impact temperature change consistency coefficient, obtain the synchronization anomaly coefficient of each time period, and monitor the status of the high-voltage power supply terminal. The present application improves the accuracy of monitoring the safety status of high-voltage power supply terminals.

Description

Technical Field

[0001] The present application relates to the technical field of high-voltage power supply terminal monitoring, and in particular to a method and system for monitoring the safety status of high-voltage power supply terminal. Background Art

[0002] High-voltage power terminals are electrical connection devices designed for high-voltage circuits. They play a vital role in the fields of industry, power, electrical and electronics, especially in connecting high-voltage power supplies, transmitting power and managing high-voltage circuits. The voltage, current and power in each interface circuit in the high-voltage terminals are large, so heat is often generated. If the heat is not dissipated in time, it may cause damage to the device. The main reasons for the heating are that the connection part is loose, causing excessive resistance to cause heating; the power load suddenly changes, the line is impacted by current, and the terminal is heated; the switch spring is under insufficient contraction force for a long time, and the heat dissipation is poor. Therefore, real-time monitoring of the temperature state of the high-voltage power terminals is one of the auxiliary means to ensure safety.

[0003] Existing conventional detection methods often rely solely on simple temperature measurement to determine whether the terminal is in a safe operating state, without fully considering the impact of the consistency relationship between current shock and temperature change. This makes it difficult to effectively detect potential temperature anomalies and has the defect of low accuracy in safety status monitoring. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of this application is to provide a method and system for monitoring the safety status of high-voltage power supply terminals. The technical solutions adopted are as follows:

[0005] The present application provides a method for monitoring the safety status of a high-voltage power supply terminal, comprising the following steps:

[0006] Obtain current data of the high-voltage power supply terminal connection line and temperature data of the terminal within the acquisition time;

[0007] According to the current mutation of the terminal, the current data is divided to obtain each rising process, falling process and constant process, and the square wave impact current and non-square wave impact current are obtained to divide the acquisition time into each time period;

[0008] For square wave impulse current, the steepness of the change of current data during the rising and falling processes in each time period is analyzed to construct the rising and falling steepness value, the offset change coefficient is constructed according to the deviation degree of current data during the constant process in the time period, and the current impulse coefficient of each square wave impulse current and non-square wave impulse current corresponding time period is obtained in combination with the rising and falling steepness value;

[0009] Analyze the consistency between the temperature change of the terminal blocks in each time period and the change of the current impact coefficient in each time period, construct the current impact temperature change consistency coefficient, and obtain the synchronization anomaly coefficient of each time period based on the difference in the current impact temperature change consistency coefficient of different terminal blocks in each time period and the average level of temperature data of different terminal blocks;

[0010] The synchronization anomaly coefficient is used to monitor the status of the high-voltage power supply terminal.

[0011] Preferably, the determination process of each ascending process, descending process and constant process is:

[0012] The current data within the acquisition time are arranged in ascending order of time to form a current data sequence, and mutation point detection is performed on the current data sequence. Each mutation point divides the current data sequence into multiple intervals. The interval in which the mean value of all current slopes is greater than 1 is regarded as an ascending process, the interval in which the mean value of all current slopes is less than -1 is regarded as a descending process, and the interval in which the previous interval is an ascending process and the next interval is a descending process is regarded as a constant process.

[0013] Preferably, the method for determining the impulse current and the non-square wave impulse current is: taking the current data in a time period including three processes of continuous rise, constant and fall as a square wave impulse current.

[0014] Preferably, the method for determining the non-square wave impulse current is: the starting and ending points of each square wave impulse current are used as dividing points to divide the acquisition time, and the current data of each time period except the time period corresponding to the square wave impulse current constitute each non-square wave impulse current.

[0015] Preferably, the calculation method corresponding to the lifting steepness value is:

[0016] The current data of the square wave impulse current during the rising process is curve fitted, and the product of the absolute value of the sum of the corresponding slopes of all current data and the slope range is taken as the steepness coefficient of the rising process. Accordingly, the steepness coefficient of the falling process is calculated, and the sum of the steepness coefficients of the rising and falling processes of the square wave impulse current is taken as the rise and fall steepness value of the corresponding time period.

[0017] Preferably, the offset variation coefficient corresponds to the calculation method as follows:

[0018] Extract the fundamental frequency information data and harmonic current data of the current data during the constant process of the square wave impulse current, calculate the DTW distance between the fundamental frequency information data and the constant process current data, and calculate the standard deviation of the harmonic current data, and use the product of the DTW distance and the standard deviation as the offset change coefficient of the corresponding time period of the square wave impulse current.

[0019] Preferably, the current impact coefficient corresponds to the calculation method: when the i-th time period corresponds to the square wave impact current: ; In the formula, They respectively represent the current impact coefficient, rising and falling steepness value, and offset variation coefficient of the i-th time period; when the i-th time period corresponds to a non-square wave impact current, the current impact coefficient is assigned to the offset variation coefficient of the i-th time period.

[0020] Preferably, the calculation method corresponding to the current shock temperature change consistency coefficient is:

[0021] ; In the formula, It represents the temperature variation consistency coefficient of the current shock of the terminal in the i-th time period, v is a constant to avoid the denominator being zero, N is the number of data in the current shock sequence in the i-th time period, Represents the jth data in the current impact sequence and temperature change trend sequence of the i-th time period;

[0022] Among them, the N time periods before each time period are taken as the neighboring time periods of each time period, and the ratios of the current impact coefficient of each time period to the current impact coefficients of its neighboring time periods are arranged in ascending order of time to form a current impact sequence of each time period;

[0023] A straight line is fitted to the temperature data in each time period, and the ratio of the absolute value of the slope of the fitted line corresponding to each time period to the absolute value of the slope of the fitted line corresponding to its adjacent time periods is arranged in ascending time order to form a temperature change trend sequence for each time period.

[0024] Preferably, the corresponding calculation method of the synchronization anomaly coefficient of each time period is:

[0025] ; In the formula, represents the synchronization anomaly coefficient of the i-th time period, Indicates the number of terminals. , Respectively represent the first , No. The current impact temperature change consistency coefficient of each terminal, Indicates the number of , No. The average value of all the temperatures of the terminals, v is a constant to avoid the denominator being zero.

[0026] An embodiment of the present application also provides a safety status monitoring system for high-voltage power supply terminals, including a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor implements the steps of any one of the above-mentioned safety status monitoring methods for high-voltage power supply terminals when executing the computer program.

[0027] It can be seen from the above that the safety status monitoring method and system of high-voltage power supply terminals provided in the present application have at least the following beneficial effects:

[0028] This application obtains the current impact coefficient by deeply analyzing the steep characteristics of the impulse current borne by the terminal during the rising and falling process, as well as the degree of deviation of the current from the fundamental frequency and the influence of the harmonic current in the constant stage, and further combines it with the consistency relationship with the temperature change to accurately reflect the degree to which the temperature change of the terminal is affected by the current impact. Its advantage is that compared with the traditional method of simply measuring temperature, it effectively avoids the interference of temperature detection caused by the environment and other factors to a certain extent;

[0029] At the same time, the synchronization anomaly coefficient is calculated by fully combining the different relationships between the temperature states and consistency characteristics of different terminal blocks, and a comprehensive assessment of the overheating fault of the current terminal block is made based on this coefficient, thereby effectively making up for the defect of poor accuracy of safety status monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 A flowchart of the steps of the safety status monitoring method of the high-voltage power supply terminal provided in this application. DETAILED DESCRIPTION

[0032] In order to further explain the technical means and effects adopted by the present application to achieve the predetermined invention purpose, the following is a detailed description of the safety status monitoring method and system of the high-voltage power supply terminal proposed in the present application, its specific implementation method, structure, features and effects, in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0033] Unless otherwise specified and limited, terms such as "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a circuit structure, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such articles or devices. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the article or device including the element. In addition, the term "and\or" used herein includes any and all combinations of one or more related listed items. All technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application.

[0034] The specific scheme of the safety status monitoring method and system for high-voltage power supply terminals provided by the present application is described in detail below with reference to the accompanying drawings.

[0035] See also Figure 1 , which shows a flowchart of a method for monitoring the safety status of a high-voltage power supply terminal provided by an embodiment of the present application, comprising the following steps:

[0036] Step 1: Obtain current data of the high-voltage power supply terminal connection line and temperature data of the terminal within the acquisition time.

[0037] In this embodiment, aluminum-based copper-clad terminals are taken as an example. The lines connected to the power terminals are often in a high-voltage state and may be constantly impacted by current, thereby causing the risk of overheating. In addition, a certain wiring position in the high-voltage line usually requires multiple power terminals to be wired and operated at the same time to ensure the reliability of the line. The number of terminals is determined according to actual conditions. In this embodiment, the current sensor is used to obtain the current data of each high-voltage power terminal connection line during the collection time, and a temperature sensor is installed at each terminal to obtain the temperature data of the terminal during each collection time. In this embodiment, the collection frequency of the current data is set to 1KHZ, the collection frequency of the temperature data is set to 10HZ, and the time of one collection time is 2min.

[0038] So far, according to the above process of this embodiment, the current data and temperature data of each terminal can be obtained.

[0039] Step 2: Divide the current data according to the current mutation of the terminal to obtain each rising process, falling process and constant process, and obtain square wave impact current and non-square wave impact current to divide the acquisition time into each time period.

[0040] High-voltage power terminals are usually important components of disconnectors, playing a key role in conducting current and connecting leads. Due to the operating environment, processing and assembly, high-voltage power terminals are prone to oxidation and dirt on the contact surface, insufficient flow capacity, and failure of the connection structure during use, which in turn causes excessive contact resistance and overheating failures when a large load current passes through. In particular, the current shock that occurs under high voltage and high power conditions will cause the current in the line to exceed the rated load capacity of the terminal in a short period of time. If the terminal has poor contact at this time, it is more likely to cause excessive heating. In addition to the influence of current shocks, the heating of the terminal may also be caused by changes in environmental factors. However, the increase in terminal temperature caused by environmental changes usually does not cause overheating failures. When the temperature increase and the current shock of the terminal show consistent characteristics, the safety risk of overheating failure is more likely to occur. Therefore, the following is the first choice for analyzing the possible impact current in the line connected to the high-voltage power terminal to evaluate the impact of the circuit on the safety state.

[0041] Affected by external environmental factors or sudden changes in load, the current often experiences square wave-style shocks, i.e., square wave shock current. The square wave shock current is a current waveform that rises rapidly to a maximum value, then remains roughly constant for a certain period of time, and then rapidly drops. The steepness of the rise and fall in this process and the fluctuation state of the constant process can reflect the degree of shock to the current, and thus affect the temperature state of the high-voltage power supply terminal to varying degrees. The steeper the rise and fall process of the square wave shock current, and the more irregular the waveform of the constant process, the more likely it is to cause overheating failure of the terminal. Therefore, the acquisition time can be divided according to whether there is a square wave current, so as to effectively analyze the intensity of the shock to the current.

[0042] For each terminal, considering that the square wave impulse current has more obvious mutation characteristics at the beginning and end of the rising and falling processes, the current data changes within the acquisition time will be analyzed to divide the rising process, falling process and constant process of the current data for analysis.

[0043] Specifically, in this embodiment, mutation point detection is performed on the current data sequence, and each mutation point divides the current data sequence into multiple intervals. Further, for each interval, the mean value of the slope of all current data in the interval is calculated, and the mean values ​​of the slopes of the rising and falling processes in the square wave impulse current are respectively much greater than 1 and much less than -1, and the mean values ​​of the slopes of other intervals are between (-1, 1). The corresponding rising and falling processes can be accurately identified according to the size of the slope. Preferably, in this embodiment, the intervals in which the mean values ​​of all current slopes in the interval are greater than 1 are regarded as rising processes, the intervals in which the mean values ​​of all current slopes in the interval are less than -1 are regarded as falling processes, and the intervals in which the previous interval is a rising process and the next interval is a falling process are regarded as constant processes.

[0044] It should be noted that, in this embodiment, the Bernaola-Galvan segmentation algorithm is used to extract mutation points of the current data within the acquisition time, and all current data within the acquisition time are arranged in ascending time order to form a current data sequence. The Bernaola-Galvan segmentation algorithm is used to detect mutation points of the current data sequence of the acquisition time to obtain the mutation point position in the current data sequence of the acquisition time. The specific mutation point detection process is a prior art and will not be repeated in this embodiment.

[0045] Furthermore, in this embodiment, the current data within the time period including the three processes of continuous rise, constant and decline is taken as a square wave impulse current. At the same time, the starting point and end point of each square wave impulse current are used as dividing points to divide the collection time, that is, the collection time is divided into multiple time periods. In this embodiment, the current data of each time period except the time period corresponding to the square wave impulse current constitutes each non-square wave impulse current.

[0046] Step 3: For the square wave impulse current, analyze the steepness of the change of the current data during the rising and falling processes in each time period to construct the rising and falling steepness value, construct the offset change coefficient according to the deviation degree of the current data during the constant process in the time period, and combine the rising and falling steepness values ​​to obtain the current impulse coefficient of the corresponding time period of the square wave impulse current and the non-square wave impulse current.

[0047] Further, after the above-mentioned segmentation process, the acquisition time can be divided into multiple time periods, wherein the current in each time period is divided into two types: square wave impact current or non-square wave impact current. First, the influence of the square wave impact current on the temperature change of the terminal block is processed as follows. Specifically, in this embodiment, the current data in the rising process is taken as an example, and curve fitting is performed on the current data. The absolute value of the sum of the slopes corresponding to all the current data in the rising process is calculated, and the product of the absolute value and the slope extreme difference is used as the steepness coefficient of the rising process. The same method is used for the falling process to obtain the steepness coefficient of the falling process. The sum of the steepness coefficients of the rising and falling processes of the square wave impact current in the i-th time period is used as the rise and fall steepness value of the i-th time period. The rise and fall steepness value of the i-th time period is recorded as . The larger the value is, the greater the oscillation amplitude of the current caused by the impact during this time period.

[0048] For the current data of the square wave impulse current constant process, the stronger the current impact, the more harmonic currents the current waveform contains in the process, and the greater the deviation of the current from the fundamental frequency. Such a waveform current impact is more likely to cause overheating failure of the terminal, causing safety risks. The current data in the constant process includes fundamental frequency information data and other harmonic current data showing the overall change trend. Furthermore, in this embodiment, the fundamental frequency signal of the current data in the square wave impulse current constant process is extracted.

[0049] Preferably, in this embodiment, discrete cosine transform technology is used to extract fundamental frequency information data and harmonic current data from the constant process current data. The steps of extracting fundamental frequency signals and harmonic signals by discrete cosine transform are well-known technologies, and the specific process will not be repeated here. Further, the DTW distance between the sequence consisting of fundamental frequency information data and the sequence consisting of current data in the constant process is analyzed; at the same time, the standard deviation of all harmonic current data in the constant process corresponding to the square wave impulse current in this time period is calculated. Among them, the DTW distance reflects the degree of deviation of the current data of the constant process from the fundamental frequency information, and the standard deviation reflects the degree of discreteness of the harmonic current data in the constant process current. The larger the DTW distance and the standard deviation, the stronger the current impulse reflected by the current data of the constant process. The product of the DTW distance and the standard deviation is used as the offset change coefficient of the time period corresponding to the square wave impulse current, and the offset change coefficient of the i-th time period is recorded as .

[0050] From the above analysis, we can see that It reflects the steepness of the rise and fall process of the square wave impulse current corresponding to this time period. It reflects the degree of deviation of the current data during the constant process of the square wave impact current in this time period. The steeper the square wave impact current and the greater the degree of deviation, the more likely it is to cause an abnormal overheating fault of the power terminal. The current impact coefficient can be obtained as follows:

[0051] ; In the formula, represents the current impact coefficient in the i-th time period, and the obtained The larger it is, the stronger the current shock received by the terminal during this time period.

[0052] For non-square wave impulse current, there are still certain harmonic currents in its current data, and there is a deviation between the current and the fundamental frequency. These unstable changes will also affect the temperature of the terminal. Therefore, when the i-th time period is a non-square wave impulse current, the current impulse coefficient of the i-th time period is the offset variation coefficient of the i-th time period, wherein the offset variation coefficient is obtained by using the calculation method of the offset variation coefficient of the current data in the process of the square wave impulse current being constant, which will not be repeated in this embodiment.

[0053] Step 4: Analyze the consistency between the terminal temperature changes in each time period and the current impact coefficient changes in each time period, construct the current impact temperature change consistency coefficient, and combine the differences in the current impact temperature change consistency coefficients of different terminals in each time period and the average levels of temperature data of different terminals to obtain the synchronization anomaly coefficient of each time period.

[0054] The terminal blocks are operated under high voltage and high current working conditions for a long time, and their temperature changes are not only affected by the line current impact, but may also be disturbed by changes in the external environment. The temperature changes of the terminal blocks caused by the external environment usually do not cause safety accidents, but will affect the accuracy of safety monitoring. When the terminal blocks are subjected to a strong current impact and the temperature rises significantly, the safety risk of the terminal blocks is higher at this time; if the terminal blocks are not subjected to current impact and the temperature rises, the safety risk of the terminal blocks is relatively low at this time, because the small temperature rise caused by environmental changes will not affect its safe operation. Therefore, the difference between the weight ratio of the impact current intensity of the terminal blocks in a continuous time period and the weight ratio of the temperature change in a continuous time period can be used to analyze the consistent characteristics, so as to more accurately evaluate the safety status of the terminal blocks.

[0055] Furthermore, in this embodiment, N time periods before the i-th time period are set as the neighboring time periods of the i-th time period, and in this embodiment, N is taken as 9. The ratio of the current impact coefficient of each time period to all the current impact coefficients in the entire neighboring time period is calculated respectively, and all the ratios are arranged in ascending time order to obtain a current impact sequence. For the temperature data in the i-th time period, the slope of the straight line obtained after straight line fitting indicates the change in the temperature rise trend of the terminal in the time period. Accordingly, the ratio of the absolute value of the slope of the fitted straight line corresponding to each time period to the absolute value of the slope of the fitted straight line corresponding to each neighboring time period is arranged in ascending time order to form a temperature change trend sequence for each time period.

[0056] Further, according to the difference between the elements at corresponding positions in the current impact sequence and the temperature change trend sequence, the consistency coefficient of the current impact temperature change of the terminal in each time period is obtained. The corresponding calculation formula in this embodiment is:

[0057] ; In the formula, It represents the consistency coefficient of the current impact temperature change of the terminal in the i-th time period, N is the number of data in the current impact sequence in the i-th time period, represents the jth data in the current impact sequence and temperature change trend sequence of the i-th time period, v is a constant to avoid the denominator being zero, ranging from 0 to 0.1, and the value in this embodiment is 0.001. The smaller it is, the closer the current impact intensity and temperature rise state are in the corresponding time period. The larger it is, the higher the consistency between the current impact and the temperature change is.

[0058] Furthermore, different power terminals are connected to different high-voltage lines. If multiple terminals have the same characteristics of current shock and temperature change, this indicates that the potential safety risk faced by the terminal is greater. Therefore, by comparing the difference relationship between the current shock and temperature change characteristics of different terminals, the synchronization anomaly coefficient of each time period is obtained. In this embodiment, the specific calculation relationship is:

[0059] ; In the formula, represents the synchronization anomaly coefficient of the i-th time period, Indicates the number of terminals. , Respectively represent the first , No. The current impact temperature change consistency coefficient of each terminal, Indicates the number of , No. The average temperature of all terminals.

[0060] It is understandable that when the temperature is higher, The larger the value, the smaller the difference in the current impact temperature change consistency coefficient between different terminals, that is, The smaller the value, the The larger the value is, the higher the safety risk of the high-voltage power terminal is.

[0061] Step 5: Based on the synchronization anomaly coefficient, the state of the high-voltage power supply terminal is evaluated.

[0062] According to the above process, this embodiment constructs a synchronous abnormality coefficient for each time period by analyzing the consistency characteristics of the current shock and temperature change of the terminal, combined with the difference in the consistency coefficient of the current shock and temperature change between different terminals, to reflect the potential possibility of abnormal overheating failure of the terminal, and then monitor its safety status.

[0063] In order to further perform quantitative evaluation, the synchronization anomaly coefficient of each time period is normalized. Preferably, in this embodiment, a logarithmic function with a base of 10 is used to normalize the synchronization anomaly coefficient, and the normalized result is recorded as L, and the status of the terminal is monitored based on this.

[0064] Preferably, in this embodiment, if the normalized synchronization anomaly coefficient is lower than the preset threshold, the current terminal state is safe; otherwise, the current terminal state is unsafe, there is a risk of failure, and corresponding countermeasures need to be taken in time. It should be noted that the preset threshold value in this embodiment is 0.5, and in actual application scenarios, the implementer can set it according to the actual situation.

[0065] According to the above process, the status of the high-voltage power supply terminal can be monitored. This embodiment improves the accuracy of monitoring the safety status of the terminal.

[0066] Based on the same inventive concept as the above method, an embodiment of the present application also provides a safety status monitoring system for high-voltage power supply terminals, including a memory, a processor, and a computer program stored in the memory and running on the processor, and when the processor executes the computer program, the steps of any one of the above-mentioned safety status monitoring methods for high-voltage power supply terminals are implemented.

[0067] It is to be understood that the sequence of the embodiments of the present application described above is for description only and does not represent the advantages and disadvantages of the embodiments. The above describes specific embodiments of the present specification. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0068] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0069] The above content is only an implementation method of the present application and is not intended to limit the scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the protection scope of the present application.

Claims

1. A method for monitoring the safety status of a high voltage power supply terminal, characterized in that: The following steps are involved: Obtain current data of the high-voltage power supply terminal connection line and temperature data of the terminal within the acquisition time; According to the current mutation of the terminal, the current data is divided to obtain each rising process, falling process and constant process, and the square wave impact current and non-square wave impact current are obtained to divide the acquisition time into each time period; The product of the absolute value of the sum of the slopes of all current data on the fitting curve corresponding to the rising and falling processes and the slope range is taken as the steepness coefficient of the rising and falling processes, and the sum of the steepness coefficients of the rising and falling processes of the square wave impulse current is taken as the rising and falling steepness value of the corresponding time period; Extract the fundamental frequency information data and harmonic current data of the current data in the constant process of the square wave impact current, calculate the DTW distance between the fundamental frequency information data and the constant process current data, and calculate the standard deviation of the harmonic current data, and use the product of the DTW distance and the standard deviation as the offset variation coefficient of the time period corresponding to the square wave impact current; when each time period corresponds to the square wave impact current, use the product of the rising and falling steepness value of each time period and the offset variation coefficient as the current impact coefficient of each time period, and when each time period corresponds to the non-square wave impact current, the current impact coefficient of each time period is the offset variation coefficient of each time period; The consistency of the terminal temperature change in each time period and the current impact coefficient in each time period is analyzed to construct the current impact temperature change consistency coefficient, which is expressed as: ; In the formula, It represents the consistency coefficient of the current impact temperature change of the terminal in the i-th time period, v is a constant to avoid the denominator being zero, N is the number of data in the current impact sequence in the i-th time period, Represents the jth data in the current impact sequence and temperature change trend sequence of the i-th time period; Among them, the N time periods before each time period are taken as the neighboring time periods of each time period, and the ratio of the current impact coefficient of each time period to the current impact coefficient of each neighboring time period is arranged in ascending time order to form a current impact sequence of each time period; the temperature data in each time period is linearly fitted, and the ratio of the absolute value of the slope of the fitting line corresponding to each time period to the absolute value of the slope of the fitting line corresponding to each neighboring time period is arranged in ascending time order to form a temperature change trend sequence of each time period; Based on the difference in the current shock temperature change consistency coefficient of different wiring terminals in each time period and the average level of temperature data of different wiring terminals, the synchronization anomaly coefficient of each time period is obtained; The synchronization anomaly coefficient is used to monitor the state of the high-voltage power supply terminal; The corresponding calculation method of the synchronization anomaly coefficient of each time period is: ; In the formula, represents the synchronization anomaly coefficient of the i-th time period, Indicates the number of terminals. , Respectively represent the first , No. The current impact temperature change consistency coefficient of each terminal, Indicates the number of , No. The average value of all the temperatures of the terminals, v is a constant to avoid the denominator being zero.

2. The method for monitoring the safety status of a high-voltage power supply terminal according to claim 1, characterized in that: The determination process of each ascending process, descending process and constant process is as follows: The current data within the acquisition time are arranged in ascending order of time to form a current data sequence, and mutation point detection is performed on the current data sequence. Each mutation point divides the current data sequence into multiple intervals. The interval in which the mean value of all current slopes is greater than 1 is regarded as an ascending process, the interval in which the mean value of all current slopes is less than -1 is regarded as a descending process, and the interval in which the previous interval is an ascending process and the next interval is a descending process is regarded as a constant process.

3. The method for monitoring the safety status of a high-voltage power supply terminal according to claim 1, characterized in that: The method for determining the impact current and the non-square wave impact current is: the current data in a time period including three processes of continuous rise, constant and fall is regarded as a square wave impact current.

4. The method for monitoring the safety status of a high-voltage power supply terminal according to claim 1, characterized in that: The method for determining the non-square wave impulse current is: using the starting point and the end point of each square wave impulse current as the segmentation point to divide the acquisition time, and the current data of each time period except the time period corresponding to the square wave impulse current constitutes each non-square wave impulse current.

5. A safety status monitoring system for high-voltage power supply terminals, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that: When the processor executes the computer program, the steps of the method for monitoring the safety status of high-voltage power supply terminals as described in any one of claims 1 to 4 are implemented.

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