Low-voltage drawer monitoring system with distributed compensation function

Abstract

The invention discloses a low-voltage drawer monitoring system with a distributed compensation function, relates to the technical field of low-voltage electrics, and aims to analyze potential factors influencing performance reduction of a distributed compensation component of a low-voltage drawer in historical maintenance logs and evaluate the distributed compensation capability of the low-voltage drawer. Analyzing load state data of the historical operation data, and predicting a distribution compensation demand of the electric equipment; judging whether the distribution compensation capability of the low-voltage drawer meets the distribution compensation requirement of the electric equipment, if so, judging normal power supply, and if not, recording the low-voltage drawer as a to-be-maintained low-voltage drawer; and according to the electric equipment associated with the to-be-maintained low-voltage drawer, analyzing the distribution compensation demand of the electric equipment and the association coefficient between the distribution compensation functional components of the low-voltage drawer, and generating a distribution compensation functional component maintenance task of the to-be-maintained low-voltage drawer. The method has the advantages that the maintenance efficiency is improved, and the maintenance cost is reduced.

Description

Technical Field

[0001] The invention relates to the field of low-voltage electrical technology, and 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. It optimizes operating efficiency and improves power quality by monitoring and adjusting the reactive power demand in the power system.

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

[0004] In order to solve the above-mentioned 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 cost of the low-voltage drawers.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is: A low-voltage drawer monitoring system with distributed compensation function, comprising: 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 capacity 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 historical maintenance logs of the distributed compensation components of the low-voltage drawer, and evaluate the distributed compensation capacity of the low-voltage drawer; The compensation demand assessment module is used to obtain historical operation data of power-consuming equipment based on IoT sensors, analyze load status data of historical operation data, and predict distributed compensation demand of power-consuming equipment; The preliminary screening module is used to determine whether the distribution compensation capacity of the low-voltage drawer meets the distribution 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 requirements of the electrical equipment and the distributed compensation functional components of the low-voltage drawer, if it is marked as a low-voltage drawer to be maintained, 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.

[0006] Preferably, the compensation capacity evaluation module is used to analyze the potential factors affecting the performance degradation of the distributed compensation component of the low-voltage drawer in the historical maintenance log based on the historical maintenance log of the distributed compensation component of the low-voltage drawer, and the evaluation of the distributed compensation capacity of the low-voltage drawer specifically includes: Standardization of historical maintenance logs of distributed compensation components based on low voltage drawers; Mark the maintenance events in the historical maintenance tasks of each distributed compensation component according to the 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 the 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; 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 capacity of the distributed compensation component of the low-voltage drawer as the dependent variable input; Among them, the performance evaluation model of the distributed compensation component of the low-voltage drawer is specifically: In the formula, is the capacity of the ith distributed compensation component of the low voltage drawer, is the characteristic data of the jth influencing factor of the i-th distributed compensation component of the maintenance event, is the intercept term, , , , are regression coefficients, n is the total number of distribution compensation components, is the total number of influencing factor characteristics, is the error term.

[0007] Preferably, the compensation capacity evaluation module is used to analyze the potential factors affecting the performance degradation of the distributed compensation component of the low-voltage drawer in the historical maintenance log based on the historical maintenance log of the distributed compensation component of the low-voltage drawer, and the evaluation of the distributed compensation capacity of the low-voltage drawer specifically includes: Determine a 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 the observation window, the load state 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 data set of positive and negative load samples of the electrical equipment; Based on SVM vector machine, a distributed compensation demand prediction model for power equipment is established; Substituting the load positive and negative sample data sets 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; Among them, the distributed compensation demand prediction model of power equipment is specifically as follows: In the formula, 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 for the bias term, The total number of positive and negative load samples.

[0008] Preferably, the maintenance component screening module is used to analyze the correlation coefficient between the distribution compensation demand of the electrical equipment and the distribution 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 distribution compensation functional component maintenance task of the low-voltage drawer to be maintained, which is specifically: Based on the historical distribution compensation demand of the power-consuming equipment and the distribution compensation component capacity of the low-voltage drawer to be maintained, a supply-demand binary scatter diagram between the distribution compensation demand and the distribution supplement component capacity is established; Based on the supply and demand binary scatter plot between the distribution compensation demand and the distribution supplement component capacity, the linear regression coefficient between the distribution compensation demand and the distribution supplement component capacity is calculated as the correlation coefficient between the distribution compensation demand of the electrical equipment and the distribution 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: In the formula, 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, The distribution of the k-th scatter point in the binary scatter plot is supplemented by the component capacity, is the total number of points in the bivariate scatter plot.

[0009] Compared with the prior art, the present invention has the following beneficial effects: The present invention proposes a low-voltage drawer monitoring solution with a distribution compensation function. The distribution compensation demand of electrical equipment is predicted through the distribution compensation capability of the low-voltage drawer. When the distribution compensation capability of the low-voltage drawer does not meet the distribution compensation demand of the electrical equipment, the drawer to be maintained is screened out and the correlation coefficient between the distribution compensation component and the distribution compensation demand of the electrical equipment is analyzed to determine the distribution compensation function component of the low-voltage drawer to be maintained. The beneficial effect is: improving maintenance efficiency and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a framework diagram of a low-voltage drawer monitoring system with distributed compensation function; Figure 2 A flow chart of the method for evaluating the distributed compensation capability of low voltage drawers; Figure 3 A flow chart of a method for predicting distributed compensation demand of electrical equipment; 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

[0011] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0012] Reference Figure 1 As shown, a low-voltage drawer monitoring system with distributed compensation function includes: 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 capacity 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 historical maintenance logs of the distributed compensation components of the low-voltage drawer, and evaluate the distributed compensation capacity of the low-voltage drawer; The compensation demand assessment module is used to obtain historical operation data of power-consuming equipment based on IoT sensors, analyze load status data of historical operation data, and predict distributed compensation demand of power-consuming equipment; The preliminary screening module is used to determine whether the distribution compensation capacity of the low-voltage drawer meets the distribution 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 requirements of the electrical equipment and the distributed compensation functional components of the low-voltage drawer, if it is marked as a low-voltage drawer to be maintained, 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.

[0013] This solution predicts the distributed compensation demand of electrical equipment through the distributed compensation capacity of low-voltage drawers. When the distributed compensation capacity of low-voltage drawers does not meet the distributed compensation demand of electrical equipment, the drawers to be maintained are screened out and the correlation coefficient between the distributed compensation components and the distributed compensation demand of electrical equipment is analyzed to determine the distributed compensation functional components of the low-voltage drawers to be maintained. The beneficial effects are: improving maintenance efficiency and reducing maintenance costs.

[0014] Reference Figure 2 As shown, the compensation capacity 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 log based on the historical maintenance log of the distributed compensation components of the low-voltage drawer, and the evaluation of the distributed compensation capacity of the low-voltage drawer specifically includes: Standardization of historical maintenance logs of distributed compensation components based on low voltage drawers; Mark the maintenance events in the historical maintenance tasks of each distributed compensation component according to the 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 the 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; 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 capacity of the distributed compensation component of the low-voltage drawer as the dependent variable input; Among them, the performance evaluation model of the distributed compensation component of the low-voltage drawer is specifically: In the formula, is the capacity of the ith distributed compensation component of the low voltage drawer, is the characteristic data of the jth influencing factor of the i-th distributed compensation component of the maintenance event, is the intercept term, , , , are regression coefficients, n is the total number of distribution compensation components, is the total number of influencing factor characteristics, is the error term.

[0015] This solution can more accurately evaluate the distributed compensation capability of low-voltage drawers by deeply mining the information in historical maintenance logs and identifying the key factors that affect the performance of low-voltage drawer distributed compensation components. This helps to detect and solve potential problems in a timely manner while reducing maintenance costs.

[0016] Reference Figure 3 As shown, the compensation capacity 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 log based on the historical maintenance log of the distributed compensation components of the low-voltage drawer, and the evaluation of the distributed compensation capacity of the low-voltage drawer specifically includes: Determine a 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 the observation window, the load state 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 data set of positive and negative load samples of the electrical equipment; Based on SVM vector machine, a distributed compensation demand prediction model for power equipment is established; Substituting the load positive and negative sample data sets 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; Among them, the distributed compensation demand prediction model of power equipment is specifically as follows: In the formula, 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 for the bias term, The total number of positive and negative load samples.

[0017] This solution sets the load threshold based on the standardized operating power of the power equipment, analyzes the load status (such as power factor and load rate) in the historical operating data, extracts the load characteristic parameters, and marks the positive and negative samples accordingly to construct the load sample data set. Then, using the SVM vector machine technology, a distributed compensation demand prediction model for power equipment is established. The model takes the load characteristic parameters as input and predicts the distributed compensation demand of power equipment as output. The beneficial effect is that by accurately predicting the compensation demand of power equipment, key data is provided for the subsequent rapid identification of distributed supplementary component defects.

[0018] Reference Figure 4 As shown, the maintenance component screening module is used to analyze the correlation coefficient between the distribution compensation demand of the electrical equipment and the distribution 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 distribution compensation functional component maintenance task of the low-voltage drawer to be maintained, which is specifically: Based on the historical distribution compensation demand of the power-consuming equipment and the distribution compensation component capacity of the low-voltage drawer to be maintained, a supply-demand binary scatter diagram between the distribution compensation demand and the distribution supplement component capacity is established; Based on the supply and demand binary scatter plot between the distribution compensation demand and the distribution supplement component capacity, the linear regression coefficient between the distribution compensation demand and the distribution supplement component capacity is calculated as the correlation coefficient between the distribution compensation demand of the electrical equipment and the distribution 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: In the formula, 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, The distribution of the k-th scatter point in the binary scatter plot is supplemented by the component capacity, is the total number of points in the bivariate scatter plot.

[0019] It can be understood that the larger the correlation coefficient, the greater the distributed compensation demand of the electrical equipment for the distributed compensation functional component capacity requirement of the low-voltage drawer, and the smaller the correlation coefficient, the smaller the distributed compensation demand of the electrical equipment for the distributed compensation functional component capacity requirement of the low-voltage drawer. Therefore, by analyzing the correlation coefficient, it is possible to quickly know which distributed compensation functional component of the low-voltage drawer to be maintained needs maintenance.

[0020] 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 only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached 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 capacity 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 historical maintenance logs of the distributed compensation components of the low-voltage drawer, and evaluate the distributed compensation capacity of the low-voltage drawer; The compensation demand assessment module is used to obtain historical operation data of power-consuming equipment based on IoT sensors, analyze load status data of historical operation data, and predict distributed compensation demand of power-consuming equipment; The preliminary screening module is used to determine whether the distribution compensation capacity of the low-voltage drawer meets the distribution 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 requirements of the electrical equipment and the distributed compensation functional components of the low-voltage drawer, if it is marked as a low-voltage drawer to be maintained, 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.

2. A low-voltage drawer monitoring system with distribution compensation function according to claim 1, characterized in that: The compensation capacity 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 log based on the historical maintenance log of the distributed compensation components of the low-voltage drawer, and the evaluation of the distributed compensation capacity of the low-voltage drawer specifically includes: Standardization of historical maintenance logs of distributed compensation components based on low voltage drawers; Mark the maintenance events in the historical maintenance tasks of each distributed compensation component according to the 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 the 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; 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 capacity of the distributed compensation component of the low-voltage drawer is used as the dependent variable input.

3. A low-voltage drawer monitoring system with distribution compensation function according to claim 2, characterized in that: The performance evaluation model of the distributed compensation component of the low-voltage drawer is specifically as follows: ； In the formula, is the capacity of the ith distributed compensation component of the low voltage drawer, is the characteristic data of the jth influencing factor of the i-th distributed compensation component of the maintenance event, is the intercept term, , , , are regression coefficients, n is the total number of distribution compensation components, is the total number of influencing factor characteristics, is the error term.

4. A low-voltage drawer monitoring system with distribution compensation function according to claim 3, characterized in that: The compensation capacity 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 log based on the historical maintenance log of the distributed compensation components of the low-voltage drawer, and the evaluation of the distributed compensation capacity of the low-voltage drawer specifically includes: Determine a 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 the observation window, the load state 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 data set of positive and negative load samples of the electrical equipment; Based on SVM vector machine, a distributed compensation demand prediction model for power 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.

5. A low voltage drawer monitoring system with distribution compensation function according to claim 4, characterized in that: The specific forecasting model of distributed compensation demand for power equipment is as follows: ； In the formula, 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.

6. A low voltage drawer monitoring system with distribution compensation function according to claim 5, characterized in that: The maintenance component screening module is used to analyze the correlation coefficient between the distribution compensation demand of the electric equipment and the distribution compensation functional component of the low-voltage drawer according to the electric equipment associated with the low-voltage drawer to be maintained, and generate the maintenance task of the distribution compensation functional component of the low-voltage drawer to be maintained, which is specifically: Based on the historical distribution compensation demand of the power-consuming equipment and the distribution compensation component capacity of the low-voltage drawer to be maintained, a supply-demand binary scatter diagram between the distribution compensation demand and the distribution supplement component capacity is established; Based on the supply and demand binary scatter plot between the distribution compensation demand and the distribution supplement component capacity, the linear regression coefficient between the distribution compensation demand and the distribution supplement component capacity is calculated as the correlation coefficient between the distribution compensation demand of the electrical equipment and the distribution compensation functional component of the low-voltage drawer; Based on the correlation coefficient between the distributed compensation demand of the electric equipment and the distributed compensation functional component of the low-voltage drawer, the maintenance task of the distributed compensation functional component of the low-voltage drawer to be maintained is determined.

7. A low voltage drawer monitoring system with distribution compensation function according to claim 6, characterized in that: The linear regression coefficient is specifically: In the formula, 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, The distribution of the k-th scatter point in the binary scatter plot is supplemented by the component capacity, is the total number of points in the bivariate scatter plot.

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