Transformer area abnormal line loss analysis and processing method

Abstract

The invention belongs to the technical field of transformer area line loss abnormity processing, and particularly relates to a transformer area abnormal line loss analysis and processing method comprising the following steps: obtaining first power consumption data and first power supply data of a to-be-tested transformer area in a target time period T1; calculating a first line loss rate of the to-be-tested transformer area in the target time period T1 by using first power consumption data, and analyzing the line loss of the target transformer area based on the first line loss rate, a preset line loss threshold and a preset line loss abnormity criterion; after analyzing the first line loss rate of the to-be-tested transformer area in the target time period T1, predicting a predicted value of a second line loss rate of the to-be-tested transformer area in the target time period T2 by using a line loss rate correction model; and comparing a result obtained by analyzing the first line loss rate with a result obtained by analyzing the predicted value of the second line loss rate to obtain a line loss comprehensive analysis result of the target transformer area. The method can automatically screen out abnormal electricity utilization users in the transformer area, and assists in screening users in the transformer area with abnormal line loss.

Description

Technical Field

[0001] The present invention belongs to the technical field of abnormal line loss processing in a transformer area, and specifically relates to an analysis and processing method for abnormal line loss in a transformer area. Background Art

[0002] The management of high-loss areas is a key task that the company's marketing department must carry out every day. It is closely linked to the company's operating economic benefits and is also the main deduction item in the current comprehensive evaluation index system of power supply stations. In order to promptly discover and complete the management of high-loss areas every day, the power supply department and power supply station will arrange special personnel to spend nearly 3 hours a day to complete a large amount of data export, comparison, call for testing, etc., so as to analyze the problem users that cause abnormal line losses in the area through system data, narrow the scope of on-site inspections by area managers, and improve the efficiency of inspections and management. Each power supply company can only realize the statistics of line losses in the area through the comparison of power supply and sales. There is a lack of identification and cause analysis methods for a large number of abnormal line losses, making it difficult for the statistical value of line loss rate to play its due role in reducing losses and energy saving in the area.

[0003] The publication number is CN 110703009 A substation line loss rate abnormal analysis and processing method, including the following steps: Step 1, the data acquisition equipment terminal is installed at the lower end of the concentrator on the low-voltage side of the public transformer substation based on the power carrier principle; Step 2, the power consumption monitoring terminal freezes all data of all single-phase and three-phase smart meters in the substation during the meter reading cycle and transmits them to the server; Step 3, the background analysis software reads the server-side data, analyzes the line loss in the substation according to the constructed line loss analysis model, automatically screens all abnormal users in the substation, and provides a basis for processing for on-site investigators.

[0004] The intelligent identification method of the cause of abnormal line loss rate in a distribution station area based on fuzzy reasoning, with publication number CN111817299B, discloses obtaining the line loss rate data of the substation area; obtaining the time period when the line loss rate of the substation area is abnormal; establishing the membership function in the fuzzy expert database according to the historical data of the line loss rate of the substation area; using the membership function to judge the line loss rate during the abnormal time period; and analyzing according to the judgment result: if the abnormal line loss rate is judged to be a negative line loss rate. Summary of the invention

[0005] The purpose of the present invention is to provide a method for analyzing and processing abnormal line loss in a substation to address the problems existing in the prior art. The method can automatically screen out abnormal electricity users in the substation and assist in screening users in the substation with abnormal line loss.

[0006] The technical solution of the present invention is:

[0007] A method for analyzing and processing abnormal line loss in a transformer area comprises the following steps:

[0008] S1. Obtain the first power consumption data and the first power supply data of the test area in the target period T1, and check the abnormal power data of the test area; the abnormal power data is the power data of the collection node with abnormal missing power collection data;

[0009] S2. Calculate the first line loss rate of the tested area in the target period T1 using the first power consumption data, and analyze the line loss of the target area based on the first line loss rate, the preset line loss threshold and the preset line loss abnormality criterion;

[0010] S3, after analyzing the first line loss rate of the station area to be tested in the target time period T1, using the line loss rate correction model to predict the predicted value of the second line loss rate of the station area to be tested in the target time period T2;

[0011] S4, based on the predicted value of the second line loss rate and the preset line loss abnormality criterion, analyzing the line loss of the tested substation; comparing the result obtained by analyzing the first line loss rate with the result obtained by analyzing the predicted value of the second line loss rate, to obtain a comprehensive analysis result of the line loss of the target substation.

[0012] Specifically, it also includes comparing the results obtained by analyzing the first line loss rate with the results obtained by analyzing the predicted value of the second line loss rate to determine whether the absolute value of the difference between the two exceeds a preset line loss threshold. If it does not exceed the threshold, the record archiving is terminated; if it exceeds the threshold, an on-site remediation strategy is formulated based on the factors affecting the abnormal line loss of the transmission line, and each factor is checked one by one according to the remediation strategy to obtain the cause of the line loss, and the cause of the line loss is recorded and archived.

[0013] Specifically, the preset line loss abnormality criteria include a metering device failure criterion and a user electricity theft criterion; based on the first line loss rate, the preset line loss threshold and the preset line loss abnormality criterion, the line loss of the tested substation is analyzed, including: if the first line loss rate is greater than or equal to the preset line loss threshold, then the abnormal cause of the line loss in the target substation is analyzed according to the first line loss rate and the line loss abnormality criterion.

[0014] Specifically, the user electricity theft criterion includes: if the similarity between the daily load curve of the user in the tested substation and the pre-characterized daily load characteristic curves of multiple users is less than a preset similarity threshold, it is determined that the abnormal cause of the line loss in the target substation includes user electricity theft; wherein the multiple daily load characteristic curves of users are obtained by a clustering algorithm.

[0015] Specifically, the metering device fault judgment criteria include: if the power factor on the user's electric energy meter side or the area total meter side in the target area is greater than a preset power factor threshold, it is determined that the abnormal cause of the line loss in the target area includes a metering device fault.

[0016] Specifically, when the line loss rate shows a negative value, a missing value, or the line loss is too large, the corresponding substation is an abnormal substation; the calculation formula for the first line loss rate is: line loss rate = (power supply - power sales) / power supply × 100%.

[0017] The beneficial effects of the present invention are as follows: the method comprises obtaining first power consumption data and first power supply data of the test area in the target time period, and verifying the abnormal power data of the target area, wherein the abnormal power data is the power data of the collection node with the power collection data missing abnormality; calculating the first line loss rate of the target area in the target time period based on the first power consumption data; analyzing the line loss of the target area based on the first line loss rate, a preset line loss threshold and a preset line loss abnormality criterion. The method of the present invention calculates the line loss rate, compares the result obtained by the first line loss rate analysis with the result obtained by the second line loss rate prediction value analysis, and determines whether the absolute value of the difference between the two exceeds the preset line loss threshold. If it does not exceed, the record archiving is terminated; if it exceeds, an on-site remediation strategy is formulated according to the influencing factors of abnormal line loss of the transmission line, and the causes of line loss are checked one by one according to the remediation strategy, and the causes of line loss are recorded and archived. By using the first line loss rate for analysis, the two abnormal causes of line loss, namely, changes in household-transformer relationship and missing electric energy data, can be excluded first, and the scope of abnormal causes of line loss can be narrowed, thereby helping to more accurately locate the abnormal causes of line loss, automatically screen out abnormal electricity users in the substation area, and assist in the screening of users in the substation area with abnormal line loss. DETAILED DESCRIPTION

[0018] The technical solution of the present invention is described in detail below in conjunction with specific implementation methods.

[0019] A method for analyzing and processing abnormal line loss in a transformer area comprises the following steps:

[0020] S1. Obtain the first power consumption data and the first power supply data of the test area in the target period T1, and check the abnormal power data of the test area; the abnormal power data is the power data of the collection node with abnormal missing power collection data;

[0021] S2. Calculate the first line loss rate of the tested area in the target period T1 using the first power consumption data, the calculation formula of the first line loss rate is: line loss rate = (power supply - power sales) / power supply × 100%, based on the first line loss rate, the preset line loss threshold and the preset line loss abnormality criterion, analyze the line loss of the target area;

[0022] S3, after analyzing the first line loss rate of the station area to be tested in the target time period T1, using the line loss rate correction model to predict the predicted value of the second line loss rate of the station area to be tested in the target time period T2;

[0023] S4, based on the predicted value of the second line loss rate and the preset line loss abnormality criterion, analyzing the line loss of the tested substation; comparing the result obtained by analyzing the first line loss rate with the result obtained by analyzing the predicted value of the second line loss rate, to obtain a comprehensive analysis result of the line loss of the target substation.

[0024] It also includes comparing the result obtained by analyzing the first line loss rate with the result obtained by analyzing the predicted value of the second line loss rate to determine whether the absolute value of the difference between the two exceeds a preset line loss threshold. If it does not exceed the threshold, the record archiving is terminated; if it exceeds the threshold, an on-site remediation strategy is formulated based on the factors affecting the abnormal line loss of the transmission line, and the causes of the line loss are checked one by one according to the remediation strategy to obtain the causes, and the causes of the line loss are recorded and archived.

[0025] The preset line loss abnormality criteria include a metering device failure criterion and a user electricity theft criterion; based on the first line loss rate, the preset line loss threshold and the preset line loss abnormality criterion, the line loss of the tested substation is analyzed, including: if the first line loss rate is greater than or equal to the preset line loss threshold, then the abnormal cause of the line loss in the target substation is analyzed according to the first line loss rate and the line loss abnormality criterion.

[0026] The user electricity theft criterion includes: if the similarity between the daily load curve of the users in the tested substation and the pre-characterized daily load characteristic curves of multiple users is less than a preset similarity threshold, it is determined that the abnormal cause of the line loss in the target substation includes user electricity theft; wherein the multiple daily load characteristic curves of users are obtained by a clustering algorithm.

[0027] The metering device fault judgment criteria include: if the power factor on the user's electric energy meter side or the area total meter side in the target area is greater than a preset power factor threshold, it is determined that the abnormal cause of the line loss in the target area includes a metering device fault.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A method for analyzing and processing abnormal line loss in a transformer area, characterized in that: The following steps are included S1. Obtain the first power consumption data and the first power supply data of the test area during the target period T1, and check the abnormal power data of the test area; The abnormal power data is the power data of the collection nodes with power collection data missing abnormality; S2. Calculate the first line loss rate of the tested area in the target period T1 using the first power consumption data, and analyze the line loss of the target area based on the first line loss rate, the preset line loss threshold and the preset line loss abnormality criterion; S3, after analyzing the first line loss rate of the station area to be tested in the target time period T1, using the line loss rate correction model to predict the predicted value of the second line loss rate of the station area to be tested in the target time period T2; S4, analyzing the line loss of the to-be-tested substation based on the predicted value of the second line loss rate and the preset line loss abnormality criterion; The result obtained through the analysis of the first line loss rate is compared with the result obtained through the analysis of the predicted value of the second line loss rate to obtain a comprehensive analysis result of the line loss in the target substation.

2. The method for analyzing and processing abnormal line loss in a transformer area according to claim 1, characterized in that: It also includes comparing the result obtained by analyzing the first line loss rate with the result obtained by analyzing the predicted value of the second line loss rate to determine whether the absolute value of the difference between the two exceeds a preset line loss threshold. If it does not exceed the threshold, the record archiving is terminated; if it exceeds the threshold, an on-site remediation strategy is formulated based on the factors affecting the abnormal line loss of the transmission line, and the causes of the line loss are checked one by one according to the remediation strategy to obtain the causes, and the causes of the line loss are recorded and archived.

3. The method for analyzing and processing abnormal line loss in a transformer area according to claim 1, characterized in that: The preset line loss abnormality judgment criteria include metering device failure judgment criteria and user electricity theft judgment criteria; Based on the first line loss rate, the preset line loss threshold and the preset line loss abnormality criterion, the line loss of the to-be-tested station area is analyzed, including: If the first line loss rate is greater than or equal to the preset line loss threshold, an abnormal cause analysis of the line loss in the target substation is performed based on the first line loss rate and the line loss abnormality criterion.

4. The method for analyzing and processing abnormal line loss in a transformer area according to claim 3 is characterized in that: The user electricity theft criterion includes: if the similarity between the daily load curve of the users in the tested substation and the pre-characterized daily load characteristic curves of multiple users is less than a preset similarity threshold, it is determined that the abnormal cause of the line loss in the target substation includes user electricity theft; wherein the multiple daily load characteristic curves of users are obtained by a clustering algorithm.

5. The method for analyzing and processing abnormal line loss in a transformer area according to claim 3 is characterized in that: The metering device fault judgment criteria include: if the power factor on the user's electric energy meter side or the area total meter side in the target area is greater than a preset power factor threshold, it is determined that the abnormal cause of the line loss in the target area includes a metering device fault.

6. The method for analyzing and processing abnormal line loss in a transformer area according to claim 1, characterized in that: When the line loss rate is negative, missing, or the line loss is too large, the corresponding substation is an abnormal substation; the calculation formula of the first line loss rate is: line loss rate = (power supply - power sales) / power supply × 100%.