Method and system for evaluating health state of power distribution equipment

Abstract

The invention discloses a power distribution equipment health state assessment method and system, and belongs to the technical field of electrical equipment state assessment. The method comprises the following steps: acquiring electrical parameters, mechanical parameters and fault maintenance parameters of the power distribution equipment; analyzing the electrical parameters, the mechanical parameters and the fault maintenance parameters of the power distribution equipment to obtain an electrical performance index, a mechanical performance index and a fault maintenance performance index of the power distribution equipment; integrating the electrical performance index, the mechanical performance index and the fault maintenance performance index of the power distribution equipment, and analyzing to obtain a health state evaluation index of the power distribution equipment; and feeding back the health state of the power distribution equipment according to the power distribution equipment health state evaluation index. According to the invention, through integrating the electrical performance index, the mechanical performance index and the fault maintenance performance index of the power distribution equipment, the effect of comprehensively and specifically evaluating the health state of the power distribution equipment is achieved, and the problem that the health state of the power distribution equipment is not comprehensively and specifically evaluated in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment status assessment, and in particular to a method and system for assessing the health status of power distribution equipment. Background Art

[0002] With the development of power systems and the complexity of distribution networks, the reliability and safety of distribution equipment have become increasingly important. Distribution equipment includes distribution transformers, distribution switchgear, distribution lines, cables, and distribution automation equipment, and their status directly affects the quality and stability of power supply. In order to ensure the reliability and safety of the power system, reduce the maintenance cost of distribution equipment, and improve the performance of distribution equipment and the operating efficiency of the power grid, a variety of technologies and methods have emerged to evaluate the health status of equipment, which brings certain benefits to discovering potential risks and replacing faulty equipment in a timely manner.

[0003] The existing distribution equipment health status assessment method and system obtains the equipment detection data of the target distribution station through the data acquisition module, sends the detection data to the digital twin model configuration module, and evaluates the health status of the distribution equipment based on the digital twin model configuration module to realize the assessment of the health status of the distribution equipment.

[0004] For example, a method for evaluating the health status of distribution equipment is announced in the invention patent with announcement number: CN105488572B, including: an initial aging index; correcting the aging index; setting the i-th preventive maintenance interval as Ti, and the equivalent service life of the distribution equipment after the i-th maintenance in the current status maintenance mode; determining the maintenance improvement degree of each maintenance based on the maintenance records; determining the health index of the equipment after time t has passed since the i-th maintenance.

[0005] For example, the invention patent with announcement number: CN109685340B announces a method and system for evaluating the health status of distribution equipment, including: using a multi-level fuzzy comprehensive evaluation method to establish a distribution equipment status evaluation model; using the hierarchical analysis method to analyze the severity of defects in various parts of the distribution equipment in the distribution equipment status evaluation model, establish an evaluation matrix for each part of the distribution equipment, and determine the weight of each evaluation index; using the fuzzy evaluation method and the weight of each evaluation index to analyze the evaluation matrix of each part of the distribution equipment, and obtain the comprehensive initial score of the distribution equipment through the weighted membership principle; constructing an identification framework for the distribution equipment status evaluation model, and determining the weight of the defect severity; performing weighted calculation on the comprehensive initial score of the distribution equipment and the weight of the defect severity to obtain the comprehensive score value of the health status evaluation of the distribution equipment However, in the process of implementing the technical solution of the invention in the embodiments of the present application, the present application found that the above technology has at least the following technical problems: In the prior art, since the health status of the distribution equipment is evaluated by establishing a twin digital model and a distribution equipment status evaluation model, only the economic loss, maintenance cost and maintenance time are evaluated in establishing the distribution equipment status evaluation model, there is a problem that the evaluation of the health status of the distribution equipment is not comprehensive and specific enough. Summary of the invention

[0006] The embodiments of the present application provide a method and system for evaluating the health status of power distribution equipment, thereby solving the problem in the prior art that the evaluation of the health status of power distribution equipment is not comprehensive and specific enough, and achieving a comprehensive and specific evaluation of the health status of power distribution equipment.

[0007] An embodiment of the present application provides a method for evaluating the health status of a power distribution device, comprising the following steps: obtaining electrical parameters, mechanical parameters, and fault maintenance parameters of the power distribution device; analyzing the electrical parameters, mechanical parameters, and fault maintenance parameters of the power distribution device to obtain an electrical performance index, a mechanical performance index, and a fault maintenance performance index of the power distribution device; analyzing and obtaining a health status evaluation index of the power distribution device by comprehensively analyzing the electrical performance index, mechanical performance index, and fault maintenance performance index of the power distribution device; and providing feedback on the health status of the power distribution device based on the health status evaluation index of the power distribution device.

[0008] Furthermore, the electrical parameters include actual voltage, actual current, actual power and actual total harmonic distortion; the mechanical parameters include actual vibration amplitude, actual temperature and actual noise; the fault maintenance parameters include operating time, number of maintenances, number of failures, standard maintenance frequency and standard failure frequency; the electrical performance index is used to describe the electrical performance of the distribution equipment; the mechanical performance index is used to describe the mechanical performance of the distribution equipment; the fault maintenance performance index is used to describe the fault maintenance performance of the distribution equipment.

[0009] Furthermore, the specific calculation formula of the electrical performance index is: ; In the formula, Expressed as the electrical performance index, Expressed as actual voltage, Expressed as rated voltage, Expressed as actual current, Expressed as rated current, Expressed as actual power, Expressed as rated power, Expressed as the actual total harmonic distortion, Expressed as standard total harmonic distortion, It is expressed as the weight ratio of the actual voltage in the electrical performance index. It is expressed as the weight ratio of actual current in the electrical performance index. It is expressed as the weight ratio of actual power in the electrical performance index. It is expressed as the weight ratio of actual total harmonic distortion in the electrical performance index.

[0010] Furthermore, the specific analysis process of the electrical performance index is: obtaining the electrical performance index, obtaining the first threshold value of the electrical performance index and the second threshold value of the electrical performance index, comparing the electrical performance index with the first threshold value of the electrical performance index and the second threshold value of the electrical performance index, when the electrical performance index is less than the first threshold value of the electrical performance index and greater than the second threshold value of the electrical performance index, it indicates that the electrical performance index is in a normal range, that is, the electrical performance of the distribution equipment is in a normal state; when in other situations, it indicates that the electrical performance index is in an abnormal range, that is, the electrical performance of the distribution equipment is in an abnormal state.

[0011] Furthermore, the specific calculation formula of the health status evaluation index of the power distribution equipment is: ; In the formula, Expressed as the health status assessment index of power distribution equipment, Expressed as the electrical performance index, Expressed as the mechanical property index, Expressed as the failure maintenance performance index, It is expressed as the weight ratio of the electrical performance index in the health status evaluation index of the power distribution equipment. It is expressed as the weight ratio of the mechanical performance index in the health status evaluation index of the power distribution equipment. It is expressed as the weight ratio of the fault maintenance performance index in the health status assessment index of the power distribution equipment.

[0012] Furthermore, the specific analysis process of the distribution equipment health status assessment index is: obtain the distribution equipment health status assessment index, obtain the first threshold value of the distribution equipment health status assessment index and the second threshold value of the distribution equipment health status assessment index, compare the distribution equipment health status assessment index with the first threshold value and the second threshold value of the distribution equipment health status assessment index, when the distribution equipment health status assessment index is less than the first threshold value of the distribution equipment health status assessment index and greater than the second threshold value of the distribution equipment health status assessment index, it indicates that the distribution equipment health status assessment index is in a qualified range; when in other situations, it indicates that the distribution equipment health status assessment index is in a qualified range.

[0013] Furthermore, the specific process of feeding back the health status of the distribution equipment based on the health status assessment index of the distribution equipment is as follows: when the health status assessment index of the distribution equipment is within a qualified range, the system feeds back the health status of the distribution equipment as a normal operating state; when the health status assessment index of the distribution equipment is within an unqualified range, the system feeds back the health status of the distribution equipment as an abnormal operating state.

[0014] Furthermore, the specific analysis process of the mechanical performance index is: obtaining the actual vibration amplitude, actual temperature and actual noise according to the mechanical parameters of the distribution equipment, analyzing the actual vibration amplitude, actual temperature and actual noise to obtain the mechanical performance index, obtaining the first threshold value of the mechanical performance index and the second threshold value of the mechanical performance index, comparing the mechanical performance index with the first threshold value and the second threshold value of the mechanical performance index, when the mechanical performance index is less than the first threshold value of the mechanical performance index and greater than the second threshold value of the mechanical performance index, it indicates that the mechanical performance index is in a normal range, that is, the mechanical performance of the distribution equipment is in a normal state; when in other situations, it indicates that the mechanical performance index is in an abnormal range, that is, the mechanical performance of the distribution equipment is in an abnormal state.

[0015] Furthermore, the specific analysis process of the fault maintenance performance index is as follows: the fault maintenance performance index is obtained by analyzing the operating time, maintenance times, failure times, standard maintenance frequency and standard failure frequency parameters, the first threshold of the fault maintenance performance index and the second threshold of the fault maintenance performance index are obtained, and the fault maintenance performance index and the first threshold of the fault maintenance performance index and the second threshold of the fault maintenance performance index are compared; when the fault maintenance performance index is less than the first threshold of the fault maintenance performance index and greater than the second threshold of the fault maintenance performance index, it indicates that the fault maintenance performance index is in a normal range, that is, the fault maintenance performance of the distribution equipment is in a normal state; when it is in other situations, it indicates that the fault maintenance performance is in an abnormal range, that is, the mechanical performance of the distribution equipment is in an abnormal state.

[0016] An embodiment of the present application provides a system for evaluating the health status of distribution equipment, including: a data acquisition module, a data processing module, a data analysis module and a status feedback module; wherein the data acquisition module is used to acquire electrical parameters, mechanical parameters and fault maintenance parameters of the distribution equipment; the data processing module is used to process the electrical parameters, mechanical parameters and fault maintenance parameters of the distribution equipment to obtain an electrical performance index, a mechanical performance index and a fault maintenance performance index; the data analysis module is used to comprehensively analyze the electrical performance index, the mechanical performance index and the fault maintenance performance index to obtain a health status evaluation index of the distribution equipment, thereby providing feedback on the health status of the distribution equipment; the status feedback module is used to provide feedback on the health status of the distribution equipment based on the health status evaluation index of the distribution equipment.

[0017] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: 1. By acquiring the electrical parameters, mechanical parameters and fault maintenance parameters of the distribution equipment, the electrical performance index, mechanical performance index and fault maintenance performance index of the distribution equipment are obtained, and then the health status evaluation index of the distribution equipment is obtained by comprehensively analyzing the electrical performance index, mechanical performance index and fault maintenance performance index of the distribution equipment. The health status of the distribution equipment is analyzed comprehensively and specifically, which effectively solves the problem that the evaluation of the health status of the distribution equipment in the prior art is not comprehensive and specific enough.

[0018] 2. By obtaining the actual voltage, actual current, actual power and actual total harmonic distortion, and analyzing them to obtain the electrical performance index, it is determined whether the electrical performance of the distribution equipment is in a normal state based on the electrical performance index, thereby achieving a comprehensive and specific analysis of the electrical performance of the distribution equipment.

[0019] 3. By obtaining the actual vibration amplitude, actual temperature and actual noise, the mechanical performance index of the distribution equipment is obtained. According to the mechanical performance index of the distribution equipment, it is judged whether the mechanical performance of the distribution equipment is in a normal state, thereby realizing a comprehensive and specific analysis of the mechanical performance of the distribution equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A flow chart of a method for evaluating the health status of power distribution equipment provided in an embodiment of the present application; Figure 2 A health status assessment index curve diagram of power distribution equipment provided in an embodiment of the present application; Figure 3 A schematic diagram of the structure of a system for evaluating the health status of power distribution equipment provided in an embodiment of the present application. DETAILED DESCRIPTION

[0021] The embodiments of the present application solve the problem that the evaluation of the health status of power distribution equipment in the prior art is not comprehensive and specific enough by providing a method and system for evaluating the health status of power distribution equipment. The electrical parameters, mechanical parameters and fault maintenance parameters of the power distribution equipment are obtained, thereby obtaining the electrical performance index, mechanical performance index and fault maintenance performance index of the power distribution equipment. The electrical performance index, mechanical performance index and fault maintenance performance index of the power distribution equipment are then analyzed comprehensively and specifically to obtain the health status evaluation index of the power distribution equipment. The health status of the power distribution equipment is analyzed comprehensively and specifically, thereby achieving a comprehensive and specific evaluation of the health status of the power distribution equipment.

[0022] The technical solution in the embodiment of the present application is to solve the above-mentioned problem that the evaluation of the health status of the power distribution equipment is not comprehensive and specific enough. The overall idea is as follows: By acquiring and analyzing the actual voltage, actual current, actual power and actual total harmonic distortion of the distribution equipment, the electrical performance index of the distribution equipment is obtained; by acquiring and analyzing the actual vibration amplitude, actual temperature and actual noise parameters of the distribution equipment, the mechanical performance index of the distribution equipment is obtained; by acquiring and analyzing the operating time, maintenance times, failure times, standard maintenance frequency and standard failure frequency of the distribution equipment, the fault maintenance performance index of the distribution equipment is obtained; the electrical performance index, mechanical performance index and fault maintenance performance index of the distribution equipment are comprehensively analyzed to obtain the health status assessment index of the distribution equipment, and then the health status of the distribution equipment is fed back, thereby achieving a comprehensive and specific evaluation of the health status of the distribution equipment.

[0023] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] like Figure 1 As shown, it is a flow chart of a method for evaluating the health status of a power distribution equipment provided in an embodiment of the present application, the method comprising the following steps: obtaining electrical parameters, mechanical parameters and fault maintenance parameters of the power distribution equipment; analyzing the electrical parameters, mechanical parameters and fault maintenance parameters of the power distribution equipment to obtain the electrical performance index, mechanical performance index and fault maintenance performance index of the power distribution equipment; analyzing and obtaining the health status evaluation index of the power distribution equipment by comprehensively analyzing the electrical performance index, mechanical performance index and fault maintenance performance index of the power distribution equipment; and feeding back the health status of the power distribution equipment according to the health status evaluation index of the power distribution equipment.

[0025] In this embodiment, the health status of the power distribution equipment is affected by many factors. This embodiment comprehensively considers the electrical parameters, mechanical parameters, and fault maintenance performance parameters of the power distribution equipment by integrating the electrical index, mechanical index, and fault maintenance performance index of the power distribution equipment, and comprehensively and specifically analyzes the factors affecting the health status of the power distribution equipment, thereby achieving a comprehensive and specific evaluation of the health status of the power distribution equipment.

[0026] Furthermore, electrical parameters include actual voltage, actual current, actual power and actual total harmonic distortion; mechanical parameters include actual vibration amplitude, actual temperature and actual noise; fault maintenance parameters include operating time, number of maintenances, number of failures, standard maintenance frequency and standard failure frequency; the electrical performance index is used to describe the electrical performance of the distribution equipment; the mechanical performance index is used to describe the mechanical performance of the distribution equipment; the fault maintenance performance index is used to describe the fault maintenance performance of the distribution equipment.

[0027] In this embodiment, the actual voltage, actual current, actual power and actual total harmonic distortion are obtained through a power quality analyzer, the actual vibration amplitude is obtained through a vibration sensor, the actual temperature is obtained through an infrared thermometer, the actual noise is obtained through an acoustic sensor, the operating time is obtained through an automatic monitoring system of the power distribution equipment, the number of failures and the number of maintenances are obtained through historical records, and the standard maintenance frequency and standard failure frequency are obtained through the manufacturer's recommendations or industry standards of the power distribution equipment.

[0028] Furthermore, the specific calculation formula of the electrical performance index is: ; In the formula, Expressed as the electrical performance index, Expressed as actual voltage, Expressed as rated voltage, Expressed as actual current, Expressed as rated current, Expressed as actual power, Expressed as rated power, Expressed as the actual total harmonic distortion, Expressed as standard total harmonic distortion, It is expressed as the weight ratio of the actual voltage in the electrical performance index. It is expressed as the weight ratio of actual current in the electrical performance index. It is expressed as the weight ratio of actual power in the electrical performance index. It is expressed as the weight ratio of actual total harmonic distortion in the electrical performance index.

[0029] In this embodiment, Represents the voltage value of the power distribution equipment in actual operation. It represents the maximum voltage value that the power distribution equipment can safely withstand under normal operating conditions set by the manufacturer. Represents the current value of the power distribution equipment in actual operation. Represents the maximum current value that the power distribution equipment can safely withstand under normal operating conditions set by the manufacturer. Represents the power value of the power distribution equipment in actual operation Represents the maximum power at which the power distribution equipment can operate safely and stably. Represents the actual total harmonic distortion of the power distribution equipment, which refers to the degree of distortion of the voltage or current waveform of the power distribution equipment. Represents the allowable limit of harmonic distortion for power distribution equipment in industry standards.

[0030] In this embodiment, the specific process of obtaining the preset weight ratio of actual voltage, actual current, actual power and actual total harmonic distortion from the database is: obtaining historical data related to the electrical performance index, finding the relationship between the actual voltage, actual current, actual power and actual total harmonic distortion and the electrical performance index, using the nonlinear least squares method to perform curve fitting to obtain a first fitting curve, and obtaining the fitting effect of the first fitting curve by analyzing the root mean square error. The first fitting curve with the smallest root mean square error is used as the first fitting curve with the best fitting effect, and the real-time actual voltage, actual current, actual power and actual total harmonic distortion are brought into the first fitting curve to obtain the corresponding weight ratio.

[0031] In this embodiment, the actual voltage, actual current, actual power and actual total harmonic distortion all reflect the health status of the power distribution equipment from different angles. The closer the actual voltage, actual current, actual power and actual total harmonic distortion are to the rated voltage, rated current, rated power and standard total harmonic distortion, the better the electrical performance of the power distribution equipment, and vice versa. This embodiment takes these four aspects into consideration and can effectively integrate the impact of different factors on the electrical performance index. This embodiment smoothes the impact of abnormal values ​​by performing logarithmic operations on the electrical performance index, which is conducive to improving the stability of the data and facilitating a more accurate and comprehensive evaluation of the electrical performance of the power distribution equipment.

[0032] Furthermore, the specific analysis process of the electrical performance index is: obtain the electrical performance index, obtain the first threshold value of the electrical performance index and the second threshold value of the electrical performance index, compare the electrical performance index with the first threshold value of the electrical performance index and the second threshold value of the electrical performance index, when the electrical performance index is less than the first threshold value of the electrical performance index and greater than the second threshold value of the electrical performance index, it indicates that the electrical performance index is in a normal range, that is, the electrical performance of the distribution equipment is in a normal state; when in other situations, it indicates that the electrical performance index is in an abnormal range, that is, the electrical performance of the distribution equipment is in an abnormal state.

[0033] In this embodiment, the electrical performance index historical data is obtained, and the first electrical performance index threshold and the second electrical performance index threshold are determined according to the electrical performance index historical data. The first electrical performance index threshold and the second electrical performance index threshold are respectively and , The value range is , The value range is , when the electrical performance index is less than the first threshold value of the electrical performance index and greater than the second threshold value of the electrical performance index, that is, , indicating that the electrical performance index is within the normal range, that is, the electrical performance of the power distribution equipment is in normal condition; when in other situations, that is or When , it means that the electrical performance index is in an abnormal range, that is, the electrical performance of the distribution equipment is in an abnormal state.

[0034] Furthermore, the specific calculation formula of the health status evaluation index of the power distribution equipment is: ; In the formula, Expressed as the health status assessment index of power distribution equipment, Expressed as the electrical performance index, Expressed as the mechanical property index, Expressed as the failure maintenance performance index, It is expressed as the weight ratio of the electrical performance index in the health status evaluation index of the power distribution equipment. It is expressed as the weight ratio of the mechanical performance index in the health status evaluation index of the power distribution equipment. It is expressed as the weight ratio of the fault maintenance performance index in the health status assessment index of the power distribution equipment.

[0035] In this embodiment, the specific process of obtaining the preset weight ratio of the electrical performance index, mechanical performance index and fault maintenance performance index from the database is: obtaining historical data related to the health status assessment index of the distribution equipment, finding the relationship between the electrical performance index, mechanical performance index and fault maintenance performance index and the health status assessment index of the distribution equipment, using the nonlinear least squares method to perform curve fitting to obtain a second fitting curve, and obtaining the fitting effect of the second fitting curve by analyzing the standard error, taking the second fitting curve with the smallest standard error as the second fitting curve with the best fitting effect, and bringing the real-time electrical performance index, mechanical performance index and fault maintenance performance index into the second fitting curve to obtain the corresponding weight ratio.

[0036] In this embodiment, the electrical performance index represents the electrical performance of the power distribution equipment, the mechanical performance index represents the mechanical performance of the power distribution equipment, and the fault maintenance performance index represents the fault maintenance performance of the power distribution equipment. The electrical performance, mechanical performance, and fault maintenance performance reflect the health status of the power distribution equipment from different aspects. Combining the three aspects can more accurately evaluate the health status of the power distribution equipment. The electrical performance index, mechanical performance index, and fault maintenance performance index are comprehensively analyzed to obtain the power distribution equipment health status evaluation index. The power distribution equipment health status evaluation index reflects the health status of the power distribution equipment, that is, whether the power distribution equipment can operate normally or whether an abnormal state occurs. The above formula can smooth the influence of abnormal values ​​through nonlinear transformation, so that the obtained power distribution equipment health status evaluation index is more reliable and explanatory.

[0037] like Figure 2As shown, it is a curve diagram of the health status assessment index of the power distribution equipment provided in the embodiment of the present application, with the electrical performance index as the independent variable and the health status assessment index of the power distribution equipment as the dependent variable. Through the increase and decrease analysis of curves 1, 2 and 3, it can be seen that when the electrical performance index is larger, the health status assessment index of the power distribution equipment is smaller; when the electrical performance index is smaller, the health status assessment index of the power distribution equipment is larger. The statistical table of the health status assessment index of the power distribution equipment is shown in Table 1: Table 1 Statistics of health status evaluation index of power distribution equipment

[0038] It can be seen from Table 1 that for curve 1, curve 2 and curve 3, when the electrical performance index and fault maintenance performance index of curve 1, curve 2 and curve 3 are all 1.00, the mechanical performance index of curve 1, curve 2 and curve 3 are 0.90, 1.00 and 1.10 respectively, and other parameters are consistent, the health status assessment index of distribution equipment of curve 1, curve 2 and curve 3 are 0.528, 0.524 and 0.519 respectively. It can be seen that when the electrical performance index is consistent with other parameters, the larger the mechanical performance index, the smaller the health status assessment index of distribution equipment.

[0039] Furthermore, the specific analysis process of the distribution equipment health status assessment index is: obtain the distribution equipment health status assessment index, obtain the first threshold value of the distribution equipment health status assessment index and the second threshold value of the distribution equipment health status assessment index, compare the distribution equipment health status assessment index with the first threshold value and the second threshold value of the distribution equipment health status assessment index, when the distribution equipment health status assessment index is less than the first threshold value of the distribution equipment health status assessment index and greater than the second threshold value of the distribution equipment health status assessment index, it indicates that the distribution equipment health status assessment index is in a qualified range; when in other situations, it indicates that the distribution equipment health status assessment index is in a qualified range.

[0040] In this embodiment, in this embodiment, the historical data of the health status evaluation index of the power distribution equipment is obtained and the first threshold value of the health status evaluation index of the power distribution equipment and the second threshold value of the health status evaluation index of the power distribution equipment are determined. The first threshold value of the health status evaluation index of the power distribution equipment and the second threshold value of the health status evaluation index of the power distribution equipment are respectively and , The value range is , The value range is , when the health status assessment index of the power distribution equipment is less than the first threshold value of the health status assessment index of the power distribution equipment and greater than the second threshold value of the health status assessment index of the power distribution equipment, that is, , indicating that the health status assessment index of the power distribution equipment is within the qualified range. When it is in other situations, that is, or When , it indicates that the health status assessment index of the power distribution equipment is in the unqualified range.

[0041] Furthermore, the specific process of feeding back the health status of the distribution equipment based on the health status assessment index of the distribution equipment is as follows: when the health status assessment index of the distribution equipment is within the qualified range, the system feeds back the health status of the distribution equipment as a normal operating state; when the health status assessment index of the distribution equipment is within the unqualified range, the system feeds back the health status of the distribution equipment as an abnormal operating state.

[0042] In this embodiment, when the health status evaluation index of the power distribution equipment is within the qualified range, it means that the power distribution equipment is in a normal state, and the system feedbacks the health status of the power distribution equipment as a normal operating state. When the health status evaluation index of the power distribution equipment is within the unqualified range, it means that the power distribution equipment is in an abnormal state, and the system feedbacks the health status of the power distribution equipment as an abnormal operating state.

[0043] Furthermore, the specific analysis process of the mechanical performance index is: obtain the actual vibration amplitude, actual temperature and actual noise according to the mechanical parameters of the distribution equipment, analyze the actual vibration amplitude, actual temperature and actual noise to obtain the mechanical performance index, obtain the first threshold of the mechanical performance index and the second threshold of the mechanical performance index, compare the mechanical performance index with the first threshold and the second threshold of the mechanical performance index, when the mechanical performance index is less than the first threshold of the mechanical performance index and greater than the second threshold of the mechanical performance index, it indicates that the mechanical performance index is in a normal range, that is, the mechanical performance of the distribution equipment is in a normal state; when in other situations, it indicates that the mechanical performance index is in an abnormal range, that is, the mechanical performance of the distribution equipment is in an abnormal state.

[0044] In this embodiment, the specific calculation formula of the mechanical property index is: ; In the formula, Expressed as the mechanical property index, Expressed as the actual vibration amplitude, Expressed as the standard vibration amplitude, Expressed as actual temperature, Expressed as rated temperature, represents the actual noise, Expressed as standard noise, It is expressed as the weight ratio of the actual vibration amplitude in the mechanical performance index. It is expressed as the weight ratio of actual temperature in mechanical properties. It is expressed as the weight ratio of actual noise in mechanical performance. is a natural constant.

[0045] In this embodiment, It is expressed as the actual vibration amplitude, which represents the magnitude of the mechanical vibration generated by the power distribution equipment during operation. represents the vibration amplitude specified by the manufacturer, Represents the temperature of the power distribution equipment during operation. Represents the normal operating temperature of the power distribution equipment specified by the manufacturer. Represents the sound intensity or decibel level produced by the equipment when in operation. It represents the maximum noise level allowed for power distribution equipment under normal operating conditions and is determined by standards organizations.

[0046] In this embodiment, the specific process of obtaining the preset weight ratio of actual vibration amplitude, actual temperature and actual noise from the database is: obtaining historical data related to the mechanical performance index, finding the relationship between the actual vibration amplitude, actual temperature and actual noise and the mechanical performance index, fitting the exponential regression curve to the third fitting curve, and obtaining the fitting effect of the third fitting curve by analyzing the root mean square error. The third fitting curve with the smallest root mean square error is used as the third fitting curve with the best fitting effect, and the real-time actual vibration amplitude, actual temperature and actual noise are brought into the third fitting curve to obtain the corresponding weight ratio.

[0047] In this embodiment, the actual vibration amplitude, actual temperature and actual noise are all important parameters for measuring the health status of the power distribution equipment. The closer the actual vibration amplitude, actual temperature and actual noise are to the standard vibration amplitude, rated temperature and standard noise data, the better the mechanical performance of the power distribution equipment, and vice versa. This embodiment takes into account the actual vibration amplitude, actual temperature and actual noise, and can effectively integrate the multi-angle evaluation effects. This embodiment smoothes the impact of abnormal values ​​by performing exponential operations on the mechanical performance index, which is conducive to reducing the distortion of the overall evaluation caused by extreme situations and is conducive to comprehensive evaluation of the mechanical performance of the power distribution equipment.

[0048] In this embodiment, the historical data of the mechanical property index are obtained and the first threshold value of the mechanical property index and the second threshold value of the mechanical property index are determined. The first threshold value of the mechanical property index and the second threshold value of the mechanical property index are respectively and , The value range is , The value range is , when the mechanical property index is less than the first threshold value of the mechanical property index and greater than the second threshold value of the mechanical property index, that is, , indicating that the mechanical performance index is in the normal range, that is, the mechanical performance of the power distribution equipment is in normal state; when it is in other situations, that is, or When , it means that the mechanical performance index is in the abnormal range, that is, the mechanical performance of the distribution equipment is in an abnormal state.

[0049] Furthermore, the specific analysis process of the fault maintenance performance index is as follows: the fault maintenance performance index is obtained by analyzing the operating time, maintenance times, failure times, standard maintenance frequency and standard failure frequency parameters, the first threshold of the fault maintenance performance index and the second threshold of the fault maintenance performance index are obtained, and the fault maintenance performance index and the first threshold of the fault maintenance performance index and the second threshold of the fault maintenance performance index are compared. When the fault maintenance performance index is less than the first threshold of the fault maintenance performance index and greater than the second threshold of the fault maintenance performance index, it indicates that the fault maintenance performance index is in a normal range, that is, the fault maintenance performance of the distribution equipment is in a normal state; when it is in other situations, it indicates that the fault maintenance performance is in an abnormal range, that is, the mechanical performance of the distribution equipment is in an abnormal state.

[0050] In this embodiment, the specific calculation formula of the fault maintenance performance index is: ; In the formula, Expressed as the failure maintenance performance index, Expressed as the number of maintenance times, Expressed as the number of failures, Expressed as running time, Expressed as standard maintenance frequency, Expressed as the standard fault frequency, It is expressed as the weight ratio of the maintenance times in the failure maintenance performance index. It is expressed as the weight ratio of the number of failures in the failure maintenance performance index.

[0051] In this embodiment, Represents the number of maintenance times of the power distribution equipment during its operation time. Represents the number of failures of the power distribution equipment during its operation time. Represents the operating time of the power distribution equipment, Represents the manufacturer's recommended intervals for routine inspection and maintenance of power distribution equipment. Represents the manufacturer's recommended expected number of failures or time intervals between failures of power distribution equipment.

[0052] In this embodiment, the specific process of obtaining the preset weight ratio of the number of maintenance times and the number of failures from the database is: obtaining historical data related to the failure maintenance performance index, finding the relationship between the number of maintenance times and the number of failures and the failure maintenance performance index, using logarithmic regression curve fitting to obtain a fourth fitting curve, and obtaining the fitting effect of the fourth fitting curve by analyzing the root mean square error. The fourth fitting curve with the smallest root mean square error is used as the fourth fitting curve with the best fitting effect, and the real-time number of maintenance times and the number of failures are brought into the fourth fitting curve to obtain the corresponding weight ratio.

[0053] In this embodiment, this embodiment comprehensively considers the operating time, maintenance times, failure times, standard maintenance frequency and standard failure frequency, which can effectively show the failure degree of the power distribution equipment. This embodiment smoothes the influence of abnormal values ​​by performing logarithmic operation on the fault maintenance performance index, which is conducive to accurately and comprehensively evaluating the fault maintenance performance of the power distribution equipment.

[0054] In this embodiment, the historical data of the fault maintenance performance index is obtained and the first threshold value of the fault maintenance performance index and the second threshold value of the fault maintenance performance index are determined. The first threshold value of the fault maintenance performance index and the second threshold value of the fault maintenance performance index are respectively and , The value range is , The value range is , when the fault maintenance performance index is less than the first threshold of the fault maintenance performance index and greater than the second threshold of the fault maintenance performance index, that is, , indicating that the fault maintenance performance index is in the normal range, that is, the fault maintenance performance of the power distribution equipment is in normal state; when it is in other situations, that is, or When , it indicates that the fault maintenance performance index is in an abnormal range, that is, the fault maintenance performance of the power distribution equipment is in an abnormal state.

[0055] like Figure 3As shown, it is a structural schematic diagram of a distribution equipment health status evaluation system provided in an embodiment of the present application. A distribution equipment health status evaluation system provided in an embodiment of the present application includes: a data acquisition module, a data processing module, a data analysis module and a status feedback module; wherein, the data acquisition module is used to acquire the electrical parameters, mechanical parameters and fault maintenance parameters of the distribution equipment; the data processing module is used to process the electrical parameters, mechanical parameters and fault maintenance parameters of the distribution equipment to obtain the electrical performance index, mechanical performance index and fault maintenance performance index; the data analysis module is used to comprehensively analyze the electrical performance index, mechanical performance index and fault maintenance performance index, and obtain the distribution equipment health status evaluation index, thereby providing feedback on the health status of the distribution equipment; the status feedback module is used to provide feedback on the health status of the distribution equipment according to the distribution equipment health status evaluation index.

[0056] In summary, the embodiments of the present application obtain the electrical parameters, mechanical parameters and fault maintenance parameters of the power distribution equipment to obtain the electrical performance index, mechanical performance index and fault maintenance performance index of the power distribution equipment, and then combine the electrical performance index, mechanical performance index and fault maintenance performance index of the power distribution equipment to comprehensively analyze and obtain the health status assessment index of the power distribution equipment, thereby effectively solving the problem that the assessment of the health status of the power distribution equipment in the prior art is not comprehensive and specific enough.

[0057] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0058] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0059] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0060] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0061] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0062] Obviously, those skilled in the art can 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.

Claims

1. A method for evaluating the health status of power distribution equipment, characterized in that: The following steps are involved: Obtain electrical parameters, mechanical parameters and fault maintenance parameters of power distribution equipment; The electrical parameters, mechanical parameters and fault maintenance parameters of the power distribution equipment are analyzed to obtain the electrical performance index, mechanical performance index and fault maintenance performance index of the power distribution equipment; The electrical performance index, mechanical performance index and fault maintenance performance index of the power distribution equipment are integrated to analyze and obtain the health status assessment index of the power distribution equipment; The health status of the power distribution equipment is fed back based on the health status evaluation index of the power distribution equipment.

2. A method for evaluating the health status of power distribution equipment as claimed in claim 1, characterized in that: The electrical parameters include actual voltage, actual current, actual power and actual total harmonic distortion; The mechanical parameters include actual vibration amplitude, actual temperature and actual noise; The fault maintenance parameters include operating time, maintenance times, fault times, standard maintenance frequency and standard fault frequency; The electrical performance index is used to describe the electrical performance of the power distribution equipment; The mechanical performance index is used to describe the mechanical performance of the power distribution equipment; The fault maintenance performance index is used to describe the fault maintenance performance of the power distribution equipment.

3. A method for evaluating the health status of power distribution equipment as claimed in claim 1, characterized in that: The specific calculation formula of the electrical performance index is: ； In the formula, Expressed as the electrical performance index, Expressed as actual voltage, Expressed as rated voltage, Expressed as actual current, Expressed as rated current, Expressed as actual power, Expressed as rated power, Expressed as the actual total harmonic distortion, Expressed as standard total harmonic distortion, It is expressed as the weight ratio of the actual voltage in the electrical performance index. It is expressed as the weight ratio of actual current in the electrical performance index. It is expressed as the weight ratio of actual power in the electrical performance index. It is expressed as the weight ratio of actual total harmonic distortion in the electrical performance index.

4. A method for evaluating the health status of power distribution equipment as claimed in claim 3, characterized in that: The specific analysis process of the electrical performance index is as follows: Obtaining an electrical performance index, obtaining a first threshold value of the electrical performance index and a second threshold value of the electrical performance index, comparing the electrical performance index with the first threshold value of the electrical performance index and the second threshold value of the electrical performance index, when the electrical performance index is less than the first threshold value of the electrical performance index and greater than the second threshold value of the electrical performance index, it indicates that the electrical performance index is within a normal range, that is, the electrical performance of the power distribution equipment is in a normal state; When in other situations, it means that the electrical performance index is in an abnormal range, that is, the electrical performance of the distribution equipment is in an abnormal state.

5. A method for evaluating the health status of power distribution equipment as claimed in claim 1, characterized in that: The specific calculation formula of the health status evaluation index of the power distribution equipment is: ； In the formula, Expressed as the health status assessment index of power distribution equipment, Expressed as the electrical performance index, Expressed as the mechanical property index, Expressed as the failure maintenance performance index, It is expressed as the weight ratio of the electrical performance index in the health status evaluation index of the power distribution equipment. It is expressed as the weight ratio of the mechanical performance index in the health status evaluation index of the power distribution equipment. It is expressed as the weight ratio of the fault maintenance performance index in the health status assessment index of the power distribution equipment.

6. A method for evaluating the health status of power distribution equipment as claimed in claim 5, characterized in that: The specific analysis process of the health status evaluation index of the power distribution equipment is as follows: Obtain a health status assessment index of a power distribution device, obtain a first threshold value of the health status assessment index of the power distribution device and a second threshold value of the health status assessment index of the power distribution device, compare the health status assessment index of the power distribution device with the first threshold value and the second threshold value of the health status assessment index of the power distribution device, and when the health status assessment index of the power distribution device is less than the first threshold value of the health status assessment index of the power distribution device and greater than the second threshold value of the health status assessment index of the power distribution device, it indicates that the health status assessment index of the power distribution device is within a qualified range; When in other situations, it means that the health status assessment index of the distribution equipment is within the qualified range.

7. A method for evaluating the health status of power distribution equipment as claimed in claim 1, characterized in that: The specific process of feeding back the health status of the power distribution equipment according to the health status evaluation index of the power distribution equipment is as follows: When the health status evaluation index of the distribution equipment is within the qualified range, the system feedback indicates that the health status of the distribution equipment is a normal operating state. When the health status evaluation index of the distribution equipment is within the unqualified range, the system feedback indicates that the health status of the distribution equipment is an abnormal operating state.

8. A method for evaluating the health status of power distribution equipment as claimed in claim 1, characterized in that: The specific analysis process of the mechanical property index is as follows: According to the mechanical parameters of the power distribution equipment, the actual vibration amplitude, the actual temperature and the actual noise are obtained, the actual vibration amplitude, the actual temperature and the actual noise are analyzed to obtain a mechanical performance index, a first threshold value of the mechanical performance index and a second threshold value of the mechanical performance index are obtained, and the mechanical performance index is compared with the first threshold value and the second threshold value of the mechanical performance index. When the mechanical performance index is less than the first threshold value of the mechanical performance index and greater than the second threshold value of the mechanical performance index, it indicates that the mechanical performance index is within a normal range, that is, the mechanical performance of the power distribution equipment is in a normal state; When in other situations, it means that the mechanical performance index is in an abnormal range, that is, the mechanical performance of the distribution equipment is in an abnormal state.

9. A method for evaluating the health status of power distribution equipment as claimed in claim 1, characterized in that: The specific analysis process of the fault maintenance performance index is as follows: The fault maintenance performance index is obtained by analyzing the parameters of the operating time, the number of maintenance times, the number of failures, the standard maintenance frequency and the standard failure frequency, and the first threshold value and the second threshold value of the fault maintenance performance index are obtained. The fault maintenance performance index and the first threshold value and the second threshold value of the fault maintenance performance index are compared. When the fault maintenance performance index is less than the first threshold value of the fault maintenance performance index and greater than the second threshold value of the fault maintenance performance index, it indicates that the fault maintenance performance index is within the normal range, that is, the fault maintenance performance of the power distribution equipment is in a normal state; When in other situations, it means that the fault maintenance performance is in an abnormal range, that is, the mechanical performance of the distribution equipment is in an abnormal state.

10. A system for evaluating the health status of power distribution equipment, characterized in that: include: Data acquisition module, data processing module, data analysis module and status feedback module; Wherein, the data acquisition module is used to obtain electrical parameters, mechanical parameters and fault maintenance parameters of the power distribution equipment; The data processing module is used to process the electrical parameters, mechanical parameters and fault maintenance parameters of the power distribution equipment to obtain an electrical performance index, a mechanical performance index and a fault maintenance performance index; The data analysis module is used to analyze and obtain the health status evaluation index of the power distribution equipment by comprehensively analyzing the electrical performance index, the mechanical performance index and the fault maintenance performance index, thereby providing feedback on the health status of the power distribution equipment; The status feedback module is used to feedback the health status of the power distribution equipment according to the health status evaluation index of the power distribution equipment.

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