A low-voltage drawer monitoring system with distributed compensation function

Abstract

The present invention discloses a low-voltage drawer monitoring system with a distribution compensation function, which relates to the field of low-voltage electrical technology. The system analyzes potential factors affecting the performance degradation of the distribution compensation component of the low-voltage drawer in historical maintenance logs to evaluate the distribution compensation capability of the low-voltage drawer. The system also analyzes load status data from historical operating data to predict the distribution compensation requirements of electrical equipment. The system determines whether the distribution compensation capability of the low-voltage drawer meets the distribution compensation requirements of the electrical equipment. If so, the system determines that the power supply is normal; if not, the system records the low-voltage drawer as awaiting maintenance. Based on the electrical equipment associated with the low-voltage drawer awaiting maintenance, the system analyzes the correlation coefficient between the distribution compensation requirements of the electrical equipment and the distribution compensation functional component of the low-voltage drawer, and generates a maintenance task for the distribution compensation functional component of the low-voltage drawer awaiting maintenance. The present invention has the advantages of improving maintenance efficiency and reducing maintenance costs.

Description

Technical Field

[0001] The present invention relates to the field of low-voltage electrical technology, in particular to a low-voltage drawer monitoring system with a distributed compensation function. Background Art

[0002] The low-voltage drawer with distributed compensation function is a key component in the low-voltage power distribution system. It integrates isolation, distribution, safety protection and reactive power distribution compensation. By monitoring and adjusting the reactive power demand in the power system, it optimizes operating efficiency and improves power quality.

[0003] In order to ensure operational stability, existing low-voltage drawers with distributed compensation functions require long-term and repeated preventive troubleshooting of the low-voltage drawers. There is usually no standard reference for the maintenance of internal components, resulting in low maintenance efficiency and high maintenance costs. Summary of the Invention

[0004] In order to solve the above technical problems, a low-voltage drawer monitoring system with a distribution compensation function is provided. This technical solution solves the problem that in order to ensure the operation stability of the above-mentioned existing low-voltage drawers with distribution compensation functions, long-term and repeated preventive troubleshooting of the low-voltage drawers is required, and there is usually no standard reference for the maintenance of internal components, which leads to low maintenance efficiency and high maintenance costs of the low-voltage drawers.

[0005] In order to achieve the above objects, the technical solution adopted by the present invention is:

[0006] A low-voltage drawer monitoring system with distributed compensation function, comprising:

[0007] The compensation capability assessment module, the compensation demand assessment module, the preliminary screening module are electrically connected to the compensation capability assessment module and the compensation demand assessment module, and the maintenance component screening module is electrically connected to the preliminary screening module;

[0008] The compensation capability evaluation module is used to analyze the potential factors affecting the performance degradation of the distributed compensation components of the low-voltage drawer in the historical maintenance logs based on the distributed compensation components of the low-voltage drawer, and evaluate the distributed compensation capability of the low-voltage drawer;

[0009] The compensation demand assessment module is used to obtain historical operating data of electrical equipment based on IoT sensors, analyze the load status data of the historical operating data, and predict the distributed compensation demand of electrical equipment;

[0010] The preliminary screening module is used to determine whether the distributed compensation capability of the low-voltage drawer meets the distributed compensation requirements of the electrical equipment. If so, it is determined that the power supply is normal; if not, it is recorded as a low-voltage drawer to be maintained;

[0011] The maintenance component screening module is used to analyze the correlation coefficient between the distributed compensation requirements of the electrical equipment and the distributed compensation functional components of the low-voltage drawer based on the electrical equipment associated with the low-voltage drawer to be maintained, and generate a maintenance task for the distributed compensation functional components of the low-voltage drawer to be maintained.

[0012] Preferably, the compensation capability evaluation module is configured to analyze potential factors affecting the performance degradation of the distributed compensation component of the low-voltage drawer in the historical maintenance log based on the distributed compensation component of the low-voltage drawer. The evaluation of the distributed compensation capability of the low-voltage drawer specifically includes:

[0013] Standardize the historical maintenance log of the distributed compensation components based on the low-voltage drawer;

[0014] Mark the maintenance events in the historical maintenance tasks of each distributed compensation component according to unit time, and obtain the time series data of the historical maintenance events of the distributed compensation components of the low-voltage drawer;

[0015] Based on the historical maintenance event time series data of the distributed compensation component of the low-voltage drawer, the maintenance frequency of each maintenance event in the historical maintenance log is counted, and maintenance events with a maintenance frequency greater than the tolerance threshold are screened out and recorded as frequent maintenance events;

[0016] Count the correlation factors of frequent maintenance events and determine the characteristic data of influencing factors of historical maintenance events; the influencing factor characteristics include: temperature, humidity, and mechanical parts;

[0017] Based on multi-factor linear regression, a distribution compensation performance evaluation model for low-voltage drawers is constructed;

[0018] The performance evaluation model of the distributed compensation component based on the low-voltage drawer is based on the characteristic data of the influencing factors of the maintenance events in the historical maintenance log of the distributed compensation component of the low-voltage drawer as the independent variable input, and the distributed compensation component capacity of the low-voltage drawer as the dependent variable output.

[0019] Preferably, the compensation capability evaluation module is configured to analyze potential factors affecting the performance degradation of the distributed compensation component of the low-voltage drawer in the historical maintenance log based on the distributed compensation component of the low-voltage drawer. The evaluation of the distributed compensation capability of the low-voltage drawer specifically includes:

[0020] Determine the load threshold of the electrical equipment based on the standardized operating power of the electrical equipment;

[0021] Based on the historical operation data of the electrical equipment, the unit time is used as an observation window, the load status of the electrical equipment within the observation window is analyzed, and the load characteristic parameters of the electrical equipment are obtained; the load characteristic parameters include: power factor and load rate;

[0022] According to the load characteristic parameters of the electrical equipment, the positive and negative load characteristic samples in the historical operation data of the electrical equipment are marked to form a positive and negative load sample data set of the electrical equipment;

[0023] Based on SVM vector machine, a distributed compensation demand prediction model for electrical equipment is established;

[0024] Substituting the positive and negative sample data sets of the load of the electrical equipment into the distributed compensation demand prediction model of the electrical equipment, taking the load characteristic parameters of the electrical equipment as input and the distributed compensation demand of the electrical equipment as output;

[0025] The distributed compensation demand prediction model for electrical equipment is specifically as follows:

[0026] ;

[0027] Where, To meet the distributed compensation requirements of electrical equipment, is the load characteristic parameter of the electrical equipment, is the support vector of the jth load positive and negative sample in the load positive and negative sample data set of the electrical equipment, is the true classification label of the support vector xi, is the kernel function, The optimal solution of Lagrange multipliers, is the optimal solution of the bias term, The total number of positive and negative load samples.

[0028] Preferably, the maintenance component screening module is used to analyze the correlation coefficient between the distributed compensation demand of the electrical equipment and the distributed compensation functional component of the low-voltage drawer according to the electrical equipment associated with the low-voltage drawer to be maintained, and generate a maintenance task for the distributed compensation functional component of the low-voltage drawer to be maintained, specifically:

[0029] Based on the historical distributed compensation demand of the electrical equipment and the distributed compensation component capacity of the low-voltage drawer to be maintained, a supply-demand binary scatter plot between the distributed compensation demand and the distributed compensation component capacity is established;

[0030] Based on the supply and demand binary scatter plot between the distributed compensation demand and the distributed compensation component capacity, the linear regression coefficient between the distributed compensation demand and the distributed compensation component capacity is calculated as the correlation coefficient between the distributed compensation demand of the electrical equipment and the distributed compensation functional component of the low-voltage drawer;

[0031] Determine the maintenance task of the distributed compensation functional component of the low-voltage drawer to be maintained based on the correlation coefficient between the distributed compensation demand of the electrical equipment and the distributed compensation functional component of the low-voltage drawer;

[0032] Wherein, the linear regression coefficient is specifically:

[0033] ;

[0034] Where, is the correlation coefficient between the distributed compensation demand of the electrical equipment and the distributed compensation functional components of the low-voltage drawer, is the distribution compensation requirement corresponding to the kth scatter point in the binary scatter plot, is the distribution compensation component capability corresponding to the kth scatter point in the binary scatter plot, is the total number of scattered points in the bivariate scatter plot.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] This invention proposes a low-voltage drawer monitoring solution with distributed compensation functionality. This solution uses the distributed compensation capabilities of the low-voltage drawers to predict the distributed compensation needs of electrical equipment. If the distributed compensation capabilities of the low-voltage drawers fail to meet the distributed compensation needs of the equipment, the solution selects the drawers to be maintained and analyzes the correlation coefficient between the distributed compensation components and the distributed compensation needs of the equipment to determine the distributed compensation components required for the low-voltage drawers. This solution has the beneficial effects of improving maintenance efficiency and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a framework diagram of a low-voltage drawer monitoring system with distributed compensation function;

[0038] Figure 2 Flowchart of the method for evaluating the distributed compensation capability of low voltage drawers;

[0039] Figure 3 A flow chart of a method for predicting distributed compensation requirements of electrical equipment;

[0040] Figure 4 A flow chart of a maintenance task method for generating a distributed compensation functional component of a low-voltage drawer to be maintained. DETAILED DESCRIPTION

[0041] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0042] Reference Figure 1 As shown, a low-voltage drawer monitoring system with distributed compensation function includes:

[0043] The compensation capability assessment module, the compensation demand assessment module, the preliminary screening module are electrically connected to the compensation capability assessment module and the compensation demand assessment module, and the maintenance component screening module is electrically connected to the preliminary screening module;

[0044] The compensation capability evaluation module is used to analyze the potential factors affecting the performance degradation of the distributed compensation components of the low-voltage drawer in the historical maintenance logs based on the distributed compensation components of the low-voltage drawer, and evaluate the distributed compensation capability of the low-voltage drawer;

[0045] The compensation demand assessment module is used to obtain historical operating data of electrical equipment based on IoT sensors, analyze the load status data of the historical operating data, and predict the distributed compensation demand of electrical equipment;

[0046] The preliminary screening module is used to determine whether the distributed compensation capability of the low-voltage drawer meets the distributed compensation requirements of the electrical equipment. If so, it is determined that the power supply is normal; if not, it is recorded as a low-voltage drawer to be maintained;

[0047] The maintenance component screening module is used to analyze the correlation coefficient between the distributed compensation requirements of the electrical equipment and the distributed compensation functional components of the low-voltage drawer based on the electrical equipment associated with the low-voltage drawer to be maintained, and generate a maintenance task for the distributed compensation functional components of the low-voltage drawer to be maintained.

[0048] This solution uses the distributed compensation capabilities of low-voltage drawers to predict the distributed compensation needs of electrical equipment. If the distributed compensation capabilities of low-voltage drawers fail to meet the distributed compensation needs of electrical equipment, the solution selects drawers for maintenance and analyzes the correlation coefficient between the distributed compensation components and the distributed compensation needs of the electrical equipment to determine the distributed compensation components for the low-voltage drawers to be maintained. This solution has the beneficial effects of improving maintenance efficiency and reducing maintenance costs.

[0049] Reference Figure 2 As shown, the compensation capability evaluation module is used to analyze the potential factors affecting the performance degradation of the distributed compensation components of the low-voltage drawer in the historical maintenance logs based on the distributed compensation components of the low-voltage drawer. The evaluation of the distributed compensation capability of the low-voltage drawer specifically includes:

[0050] Standardize the historical maintenance log of the distributed compensation components based on the low-voltage drawer;

[0051] Mark the maintenance events in the historical maintenance tasks of each distributed compensation component according to unit time, and obtain the time series data of the historical maintenance events of the distributed compensation components of the low-voltage drawer;

[0052] Based on the historical maintenance event time series data of the distributed compensation component of the low-voltage drawer, the maintenance frequency of each maintenance event in the historical maintenance log is counted, and maintenance events with a maintenance frequency greater than the tolerance threshold are screened out and recorded as frequent maintenance events;

[0053] Count the correlation factors of frequent maintenance events and determine the characteristic data of influencing factors of historical maintenance events; the influencing factor characteristics include: temperature, humidity, and mechanical parts;

[0054] Based on multi-factor linear regression, a distribution compensation performance evaluation model for low-voltage drawers is constructed;

[0055] The performance evaluation model of the distributed compensation component based on the low-voltage drawer is based on the characteristic data of the influencing factors of the maintenance events in the historical maintenance log of the distributed compensation component of the low-voltage drawer as the independent variable input, and the distributed compensation component capacity of the low-voltage drawer as the dependent variable output.

[0056] This solution deeply mines historical maintenance logs to identify key factors affecting the performance of the LV drawer's distributed compensation components, enabling a more accurate assessment of the LV drawer's distributed compensation capabilities. This helps identify and resolve potential issues promptly, while also reducing maintenance costs.

[0057] Reference Figure 3 As shown, the compensation capability evaluation module is used to analyze the potential factors affecting the performance degradation of the distributed compensation components of the low-voltage drawer in the historical maintenance logs based on the distributed compensation components of the low-voltage drawer. The evaluation of the distributed compensation capability of the low-voltage drawer specifically includes:

[0058] Determine the load threshold of the electrical equipment based on the standardized operating power of the electrical equipment;

[0059] Based on the historical operation data of the electrical equipment, the unit time is used as an observation window, the load status of the electrical equipment within the observation window is analyzed, and the load characteristic parameters of the electrical equipment are obtained; the load characteristic parameters include: power factor and load rate;

[0060] According to the load characteristic parameters of the electrical equipment, the positive and negative load characteristic samples in the historical operation data of the electrical equipment are marked to form a positive and negative load sample data set of the electrical equipment;

[0061] Based on SVM vector machine, a distributed compensation demand prediction model for electrical equipment is established;

[0062] Substituting the positive and negative sample data sets of the load of the electrical equipment into the distributed compensation demand prediction model of the electrical equipment, taking the load characteristic parameters of the electrical equipment as input and the distributed compensation demand of the electrical equipment as output;

[0063] The distributed compensation demand prediction model for electrical equipment is specifically as follows:

[0064] ;

[0065] Where, To meet the distributed compensation requirements of electrical equipment, is the load characteristic parameter of the electrical equipment, is the support vector of the jth load positive and negative sample in the load positive and negative sample data set of the electrical equipment, is the true classification label of the support vector xi, is the kernel function, The optimal solution of Lagrange multipliers, is the optimal solution of the bias term, The total number of positive and negative load samples.

[0066] This solution sets load thresholds based on the standardized operating power of electrical equipment. It analyzes load conditions (such as power factor and load factor) from historical operating data, extracts load characteristic parameters, and labels positive and negative samples accordingly to construct a load sample dataset. Next, using SVM technology, a distributed compensation demand prediction model for electrical equipment is established. This model takes load characteristic parameters as input and outputs a prediction of the distributed compensation demand of electrical equipment. This has the beneficial effect of accurately predicting the compensation demand of electrical equipment, providing critical data for the subsequent rapid identification of distributed compensation component defects.

[0067] Reference Figure 4 As shown, the maintenance component screening module is used to analyze the correlation coefficient between the distributed compensation demand of the electrical equipment and the distributed compensation functional component of the low-voltage drawer according to the electrical equipment associated with the low-voltage drawer to be maintained, and generate the distributed compensation functional component maintenance task of the low-voltage drawer to be maintained. Specifically, the maintenance task is:

[0068] Based on the historical distributed compensation demand of the electrical equipment and the distributed compensation component capacity of the low-voltage drawer to be maintained, a supply-demand binary scatter plot between the distributed compensation demand and the distributed compensation component capacity is established;

[0069] Based on the supply and demand binary scatter plot between the distributed compensation demand and the distributed compensation component capacity, the linear regression coefficient between the distributed compensation demand and the distributed compensation component capacity is calculated as the correlation coefficient between the distributed compensation demand of the electrical equipment and the distributed compensation functional component of the low-voltage drawer;

[0070] Determine the maintenance task of the distributed compensation functional component of the low-voltage drawer to be maintained based on the correlation coefficient between the distributed compensation demand of the electrical equipment and the distributed compensation functional component of the low-voltage drawer;

[0071] Wherein, the linear regression coefficient is specifically:

[0072] ;

[0073] Where, is the correlation coefficient between the distributed compensation demand of the electrical equipment and the distributed compensation functional components of the low-voltage drawer, is the distribution compensation requirement corresponding to the kth scatter point in the binary scatter plot, is the distribution compensation component capability corresponding to the kth scatter point in the binary scatter plot, is the total number of scattered points in the bivariate scatter plot.

[0074] It can be understood that the larger the correlation coefficient, the greater the distribution compensation demand of the electrical equipment for the distribution compensation functional component capacity requirement of the low-voltage drawer, and the smaller the correlation coefficient, the smaller the distribution compensation demand of the electrical equipment for the distribution compensation functional component capacity requirement of the low-voltage drawer. Therefore, by analyzing the correlation coefficient, it is possible to quickly know which distribution compensation functional component of the low-voltage drawer to be maintained needs maintenance.

[0075] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-voltage drawer monitoring system with distributed compensation function, characterized in that: include: The compensation capability assessment module, the compensation demand assessment module, the preliminary screening module are electrically connected to the compensation capability assessment module and the compensation demand assessment module, and the maintenance component screening module is electrically connected to the preliminary screening module; The compensation capability evaluation module is used to analyze the potential factors affecting the performance degradation of the distributed compensation components of the low-voltage drawer in the historical maintenance logs based on the distributed compensation components of the low-voltage drawer, and evaluate the distributed compensation capability of the low-voltage drawer; The compensation demand assessment module is used to obtain historical operating data of electrical equipment based on IoT sensors, analyze the load status data of the historical operating data, and predict the distributed compensation demand of electrical equipment; The preliminary screening module is used to determine whether the distributed compensation capability of the low-voltage drawer meets the distributed compensation requirements of the electrical equipment. If so, it is determined that the power supply is normal; if not, it is recorded as a low-voltage drawer to be maintained; The maintenance component screening module is used to analyze the correlation coefficient between the distributed compensation demand of the electrical equipment and the distributed compensation functional component of the low-voltage drawer according to the electrical equipment associated with the low-voltage drawer to be maintained, and generate a maintenance task for the distributed compensation functional component of the low-voltage drawer to be maintained; The maintenance component screening module is used to analyze the correlation coefficient between the distributed compensation demand of the electrical equipment and the distributed compensation functional component of the low-voltage drawer according to the electrical equipment associated with the low-voltage drawer to be maintained, and generate the maintenance task of the distributed compensation functional component of the low-voltage drawer to be maintained, specifically: Based on the historical distributed compensation demand of the electrical equipment and the distributed compensation component capacity of the low-voltage drawer to be maintained, a supply-demand binary scatter plot between the distributed compensation demand and the distributed compensation component capacity is established; Based on the supply and demand binary scatter plot between the distributed compensation demand and the distributed compensation component capacity, the linear regression coefficient between the distributed compensation demand and the distributed compensation component capacity is calculated as the correlation coefficient between the distributed compensation demand of the electrical equipment and the distributed compensation functional component of the low-voltage drawer; Determine the maintenance task of the distributed compensation functional component of the low-voltage drawer to be maintained based on the correlation coefficient between the distributed compensation demand of the electrical equipment and the distributed compensation functional component of the low-voltage drawer; Wherein, the linear regression coefficient is specifically: ； Where, is the correlation coefficient between the distributed compensation demand of the electrical equipment and the distributed compensation functional components of the low-voltage drawer, is the distribution compensation requirement corresponding to the kth scatter point in the binary scatter plot, is the distribution compensation component capability corresponding to the kth scatter point in the binary scatter plot, is the total number of scattered points in the bivariate scatter plot.

2. A low-voltage drawer monitoring system with distributed compensation function according to claim 1, characterized in that: The compensation capability evaluation module is used to analyze the potential factors affecting the performance degradation of the distributed compensation components of the low-voltage drawer in the historical maintenance logs of the distributed compensation components of the low-voltage drawer based on the historical maintenance logs. The evaluation of the distributed compensation capability of the low-voltage drawer specifically includes: Standardize the historical maintenance log of the distributed compensation components based on the low-voltage drawer; Mark the maintenance events in the historical maintenance tasks of each distributed compensation component according to unit time, and obtain the time series data of the historical maintenance events of the distributed compensation components of the low-voltage drawer; Based on the historical maintenance event time series data of the distributed compensation component of the low-voltage drawer, the maintenance frequency of each maintenance event in the historical maintenance log is counted, and maintenance events with a maintenance frequency greater than the tolerance threshold are screened out and recorded as frequent maintenance events; Count the correlation factors of frequent maintenance events and determine the characteristic data of influencing factors of historical maintenance events; the influencing factor characteristics include: temperature, humidity, and mechanical parts; Based on multi-factor linear regression, a distribution compensation performance evaluation model for low-voltage drawers is constructed; A performance evaluation model of distributed compensation components based on low-voltage drawers is proposed. The characteristic data of influencing factors of maintenance events in the historical maintenance log of the distributed compensation components of the low-voltage drawers are used as independent variable inputs, and the capacity of the distributed compensation components of the low-voltage drawers is used as the dependent variable output.

3. A low-voltage drawer monitoring system with distribution compensation function according to claim 2, characterized in that: The compensation capability evaluation module is used to analyze the potential factors affecting the performance degradation of the distributed compensation components of the low-voltage drawer in the historical maintenance logs of the distributed compensation components of the low-voltage drawer based on the historical maintenance logs. The evaluation of the distributed compensation capability of the low-voltage drawer specifically includes: Determine the load threshold of the electrical equipment based on the standardized operating power of the electrical equipment; Based on the historical operation data of the electrical equipment, the unit time is used as an observation window, the load status of the electrical equipment within the observation window is analyzed, and the load characteristic parameters of the electrical equipment are obtained; the load characteristic parameters include: power factor and load rate; According to the load characteristic parameters of the electrical equipment, the positive and negative load characteristic samples in the historical operation data of the electrical equipment are marked to form a positive and negative load sample data set of the electrical equipment; Based on SVM vector machine, a distributed compensation demand prediction model for electrical equipment is established; The positive and negative sample data sets of the load of the electrical equipment are substituted into the distributed compensation demand prediction model of the electrical equipment, with the load characteristic parameters of the electrical equipment as input and the distributed compensation demand of the electrical equipment as output.

4. A low-voltage drawer monitoring system with distribution compensation function according to claim 3, characterized in that: The distributed compensation demand forecasting model for electrical equipment is as follows: ； Where, To meet the distributed compensation requirements of electrical equipment, is the load characteristic parameter of the electrical equipment, is the support vector of the jth load positive and negative sample in the load positive and negative sample data set of the electrical equipment, is the true classification label of the support vector xi, is the kernel function, The optimal solution of Lagrange multipliers, is the optimal solution of the bias term, The total number of positive and negative load samples.

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