Method and system for detecting abnormal contact of metering device

Abstract

The invention provides a method and system for detecting abnormal contact of a metering device, and the method comprises the steps: extracting current and voltage data of the metering device in a preset time period; extracting data points in the current and voltage data according to a preset extraction standard, and determining whether a judgment condition is met or not according to the data of the extracted data points and the number of days where the data points are located; if yes, whether the voltage of the metering device in the preset time period meets a preset voltage state or not is determined; if the preset voltage state is met, judging that the metering device is in normal contact; and if the preset voltage state is not met and the switch is not the low-voltage load switch, judging that the metering device is in contact abnormally. According to the invention, timely contact of poor low voltage from hundreds of thousands of metering devices can be realized, real-time on-line monitoring of low voltage can be realized if the device is applied to a system, manpower and material resources can be saved, economic loss of an electric power department can be reduced, and occurrence of electric fire safety accidents can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of power system automation, and in particular to a method and system for detecting contact anomaly of a metering device. Background Art

[0002] Poor contact at the live wire inlet port of the metering device and the voltage connector of the junction box not only leads to under-counting of electricity and loss of state-owned assets, but also leads to fire of the metering device, or even fire of the meter box, causing fire or leakage and other power accidents. Therefore, timely and accurate detection of this hidden danger is important and urgent. At present, there are two main types of locking of this anomaly. One is to find out whether the voltage at the incoming line of the metering device is greater than the voltage displayed by the meter through on-site verification, or to find out that there are abnormal conditions such as sparking and blackening at the contact of the voltage connector of the junction box and the wire ear through on-site verification. This identification method is time-consuming and labor-intensive, and it is obviously difficult to find abnormalities in time in the face of hundreds of millions of meters and manpower shortages in the power department. Another big data analysis method is to lock this anomaly through the data feature that the meter with poor contact is low voltage. However, the data feature of low voltage may also be caused by the long power supply radius and voltage component failure in addition to the poor contact of the metering device. This is the main reason why the current industry has been stagnant in the identification of poor contact. Summary of the invention

[0003] The purpose of the present invention is to provide a method and system for detecting abnormal contact of a metering device, so as to solve the technical problem of how to detect poor contact of a metering device.

[0004] In one aspect, a method for detecting contact abnormality of a metering device is provided, comprising:

[0005] Extracting current and voltage data of the metering device within a preset time period;

[0006] Extracting data points from the current and voltage data according to a preset extraction standard, and determining whether the judgment condition is met based on the number of data points extracted and the day on which the data points are located;

[0007] If the judgment conditions are met, determining whether the voltage of the metering device within the preset time period meets the preset voltage state;

[0008] If the preset voltage state is met, the contact of the metering device is determined to be normal; if the preset voltage state is not met and it is not a low-voltage load switch, the contact of the metering device is determined to be abnormal.

[0009] Preferably, the metering device includes at least a target meter and other meters in the same meter box as the target meter.

[0010] Preferably, the judgment condition includes that the number of data points extracted exceeds a preset first quantity threshold, and the number of days where the data is located is greater than or equal to a preset second quantity threshold.

[0011] Preferably, the determining whether the voltage of the metering device within the preset time period satisfies the preset voltage state includes judging whether the voltage of the target meter within the preset time period is within a preset voltage range for a number of consecutive days greater than or equal to a second number threshold;

[0012] If the target meter does not have a voltage within the preset voltage range for a number of consecutive days greater than or equal to the second number threshold within the preset time period, it is determined that the low voltage is caused by an excessively long power supply radius.

[0013] Preferably, it also includes, if the voltage of the target meter is within the preset voltage range for a number of consecutive days greater than or equal to a second number threshold within a preset time period, then all time points when the voltage of the target meter is within the preset voltage range within the consecutive days are extracted, and the voltage data of other meters within the preset time period are extracted.

[0014] Preferably, it also includes determining whether the voltage of other meters is within a preset voltage range for a number of consecutive days greater than or equal to a second number threshold value within a preset time period; if the voltage of other meters is within the preset voltage range for a number of consecutive days greater than or equal to the second number threshold value within the preset time period, it is determined that the preset voltage state is met; if the voltage of other meters is not within the preset voltage range for a number of consecutive days greater than or equal to the second number threshold value within the preset time period, it is determined that the preset voltage state is not met.

[0015] On the other hand, a system for detecting contact abnormality of a metering device is also provided, which is used to implement the method for detecting contact abnormality of a metering device, comprising:

[0016] A data extraction module, used to extract current and voltage data of the metering device within a preset time period;

[0017] A data judgment module is used to extract data points from the current and voltage data according to a preset extraction standard, and determine whether the judgment conditions are met based on the number of data points extracted and the day on which the data points are located;

[0018] A data processing module, used to determine whether the voltage of the metering device within a preset time period meets a preset voltage state if the judgment conditions are met;

[0019] If the preset voltage state is met, the contact of the metering device is determined to be normal; if the preset voltage state is not met and it is not a low-voltage load switch, the contact of the metering device is determined to be abnormal.

[0020] Preferably, the data judgment module is specifically used to judge whether the voltage of the target meter is within a preset voltage range for a number of consecutive days greater than or equal to a second number threshold within a preset time period;

[0021] If the target meter does not have a voltage within the preset voltage range for a number of consecutive days greater than or equal to the second number threshold within the preset time period, it is determined that the low voltage is caused by an excessively long power supply radius.

[0022] Preferably, the data judgment module is also used to extract all time points when the voltage of the target meter is within the preset voltage range within the consecutive days if the voltage of the target meter is within the preset voltage range for a number of consecutive days greater than or equal to a second number threshold within a preset time period, and extract the voltage data of other meters within the preset time period.

[0023] Preferably, the data judgment module is also used to determine whether the voltage of other meters is within a preset voltage range for a number of consecutive days greater than or equal to a second number threshold value within a preset time period; if the voltage of other meters is within the preset voltage range for a number of consecutive days greater than or equal to the second number threshold value within the preset time period, it is determined that the preset voltage state is met; if the voltage of other meters is not within the preset voltage range for a number of consecutive days greater than or equal to the second number threshold value within the preset time period, it is determined that the preset voltage state is not met.

[0024] In summary, the implementation of the embodiments of the present invention has the following beneficial effects:

[0025] The method and system for detecting abnormal contact of metering devices provided by the present invention can timely detect low voltage with poor contact from hundreds of millions of metering devices. If applied to the system, real-time online monitoring of low voltage can be achieved. Compared with the current manual verification, it can save manpower and material resources, reduce economic losses of the power sector, and avoid the occurrence of power fire safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0027] Figure 1 The main flow chart of a method for detecting contact abnormality of a metering device in an embodiment of the present invention is shown in FIG.

[0028] Figure 2The figure is a logic diagram of a method for detecting contact abnormality of a metering device in an embodiment of the present invention. DETAILED DESCRIPTION

[0029] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] like Figure 1 and Figure 2 FIG. 1 is a schematic diagram of an embodiment of a method for detecting contact abnormality of a metering device provided by the present invention. In this embodiment, the method comprises the following steps:

[0031] Step S1, extracting the current and voltage data of the metering device within a preset time period; understandably, extracting the current and voltage of the meter and the meter in the same meter box within the past 7 days. The preset time period can be set according to the specific situation, and this embodiment is set to 7 days.

[0032] In one embodiment, the metering device includes at least a target meter and other meters in the same meter box as the target meter.

[0033] Step S2, extracting data points from the current and voltage data according to the preset extraction standard, and determining whether the judgment condition is met according to the number of data points extracted and the number of days where the data points are located; in a specific embodiment, the judgment condition includes that the number of data points extracted exceeds a preset first quantity threshold, and the number of days where the data are located is greater than or equal to a preset second quantity threshold. Understandably, it is determined whether the number of data points extracted exceeds 7, and the number of days where the data are located is greater than or equal to 3. If not, it is determined that the judgment condition is not met.

[0034] Step S3, if the judgment conditions are met, determine whether the voltage of the metering device in the preset time period meets the preset voltage state; understandably, determine whether the voltage of the meter is between 185 and 200V for 3 consecutive days or more in these 7 days. If not, it is determined that the low voltage is caused by the long power supply radius. If so, extract all time points when the voltage of the meter is between 185 and 200V for 3 consecutive days or more; extract the voltage data of other meters in the same meter box in these 7 days.

[0035] In one embodiment, the determination of whether the voltage of the metering device in the preset time period satisfies the preset voltage state includes judging whether the voltage of the target meter is within the preset voltage range for a number of consecutive days greater than or equal to the second number threshold in the preset time period; if the voltage of the target meter is not within the preset voltage range for a number of consecutive days greater than or equal to the second number threshold in the preset time period, then judging that the low voltage is caused by an excessively long power supply radius. If the voltage of the target meter is within the preset voltage range for a number of consecutive days greater than or equal to the second number threshold in the preset time period, then extracting all time points when the voltage of the target meter is within the preset voltage range in the consecutive days, and extracting the voltage data of other meters in the preset time period. Determine whether the voltage of other meters is within the preset voltage range for a number of consecutive days greater than or equal to the second number threshold value within the preset time period. If the voltage of other meters is within the preset voltage range for a number of consecutive days greater than or equal to the second number threshold value within the preset time period, determine that the preset voltage state is met; if the voltage of other meters is not within the preset voltage range for a number of consecutive days greater than or equal to the second number threshold value within the preset time period, determine that the preset voltage state is not met.

[0036] Step S4: If the preset voltage state is met, the contact of the metering device is determined to be normal; if the preset voltage state is not met and it is not a low-voltage load switch, the contact of the metering device is determined to be abnormal. Understandably, it is determined whether the voltage of other meters in the same meter box is also between 185 and 200V in these 3 days or more. If so, it is determined that the contact of the metering device is normal.

[0037] An embodiment of the present invention further provides a system for detecting contact abnormality of a metering device, which is used for the method for detecting contact abnormality of a metering device, comprising:

[0038] A data extraction module, used to extract current and voltage data of the metering device within a preset time period;

[0039] A data judgment module is used to extract data points from the current and voltage data according to a preset extraction standard, and determine whether the judgment conditions are met based on the number of data points extracted and the day on which the data points are located;

[0040] A data processing module, used to determine whether the voltage of the metering device within a preset time period meets a preset voltage state if the judgment conditions are met;

[0041] If the preset voltage state is met, the contact of the metering device is determined to be normal; if the preset voltage state is not met and it is not a low-voltage load switch, the contact of the metering device is determined to be abnormal.

[0042] In a specific embodiment, the data judgment module is specifically used to judge whether the voltage of the target meter is within a preset voltage range for a number of consecutive days greater than or equal to a second number threshold value within a preset time period; if the target meter does not have a voltage within the preset voltage range for a number of consecutive days greater than or equal to the second number threshold value within the preset time period, it is determined that the low voltage is caused by an excessively long power supply radius.

[0043] In a specific embodiment, the data judgment module is also used to extract all time points when the voltage of the target meter is within the preset voltage range for consecutive days greater than or equal to the second number threshold value, and extract the voltage data of other meters within the preset time period if the target meter has a voltage within the preset voltage range for consecutive days greater than or equal to the second number threshold value within the preset time period. The data judgment module is also used to determine whether the voltage of other meters is within the preset voltage range for consecutive days greater than or equal to the second number threshold value within the preset time period; if the voltage of other meters is within the preset voltage range for consecutive days greater than or equal to the second number threshold value within the preset time period, it is determined that the preset voltage state is satisfied; if the voltage of other meters is not within the preset voltage range for consecutive days greater than or equal to the second number threshold value within the preset time period, it is determined that the preset voltage state is not satisfied.

[0044] It should be noted that the system described in the above embodiment corresponds to the method described in the above embodiment. Therefore, the undetailed parts of the system described in the above embodiment can be obtained by referring to the contents of the method described in the above embodiment, and will not be repeated here.

[0045] In summary, the implementation of the embodiments of the present invention has the following beneficial effects:

[0046] The method and system for detecting abnormal contact of metering devices provided by the present invention can timely detect low voltage with poor contact from hundreds of millions of metering devices. If applied to the system, real-time online monitoring of low voltage can be achieved. Compared with the current manual verification, it can save manpower and material resources, reduce economic losses of the power sector, and avoid the occurrence of power fire safety accidents.

[0047] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A method for detecting contact abnormality of a metering device, characterized in that: include: Extracting current and voltage data of the metering device within a preset time period; Extracting data points from the current and voltage data according to a preset extraction standard, and determining whether the judgment condition is met based on the number of data points extracted and the day on which the data points are located; If the judgment conditions are met, determining whether the voltage of the metering device within the preset time period meets the preset voltage state; If the preset voltage state is met, it is determined that the contact of the metering device is normal; If the preset voltage state is not met and it is not a low-voltage load switch, it is determined that the contact of the metering device is abnormal.

2. The method according to claim 1, characterized in that The metering device at least includes a target meter and other meters in the same meter box as the target meter.

3. The method according to claim 2, characterized in that The judgment condition includes that the number of data points extracted exceeds a preset first quantity threshold, and the number of days in which the data is located is greater than or equal to a preset second quantity threshold.

4. The method according to claim 3, characterized in that The step of determining whether the voltage of the metering device within the preset time period satisfies the preset voltage state includes determining whether the voltage of the target meter within the preset time period is within the preset voltage range for a number of consecutive days greater than or equal to a second number threshold; If the target meter does not have a voltage within the preset voltage range for a number of consecutive days greater than or equal to the second number threshold within the preset time period, it is determined that the low voltage is caused by an excessively long power supply radius.

5. The method according to claim 4, characterized in that It also includes, if the voltage of the target meter is within the preset voltage range for a number of consecutive days greater than or equal to a second number threshold within a preset time period, extracting all time points when the voltage of the target meter is within the preset voltage range within the consecutive days, and extracting the voltage data of other meters within the preset time period.

6. The method according to claim 5, characterized in that The method further includes determining that the voltage of other meters is within a preset voltage range for a number of consecutive days greater than or equal to a second number threshold value within a preset time period, and determining that a preset voltage state is satisfied if the voltage of other meters is within the preset voltage range for a number of consecutive days greater than or equal to the second number threshold value within the preset time period; If the voltage of other meters does not fall within the preset voltage range for a number of consecutive days greater than or equal to the second number threshold within the preset time period, it is determined that the preset voltage state is not met.

7. A system for detecting contact anomalies of a metering device, used to implement the method according to any one of claims 1 to 6, characterized in that: include, A data extraction module, used to extract current and voltage data of the metering device within a preset time period; A data judgment module is used to extract data points from the current and voltage data according to a preset extraction standard, and determine whether the judgment conditions are met based on the number of data points extracted and the day on which the data points are located; A data processing module, used to determine whether the voltage of the metering device within a preset time period meets a preset voltage state if the judgment conditions are met; If the preset voltage state is met, it is determined that the contact of the metering device is normal; If the preset voltage state is not met and it is not a low-voltage load switch, it is determined that the contact of the metering device is abnormal.

8. The system according to claim 7, characterized in that The data judgment module is specifically used to judge whether the voltage of the target meter is within a preset voltage range for a number of consecutive days greater than or equal to a second number threshold within a preset time period; If the target meter does not have a voltage within the preset voltage range for a number of consecutive days greater than or equal to the second number threshold within the preset time period, it is determined that the low voltage is caused by an excessively long power supply radius.

9. The system according to claim 8, characterized in that The data judgment module is also used to extract all time points when the voltage of the target meter is within the preset voltage range within the consecutive days if the voltage of the target meter is within the preset voltage range for a number of consecutive days greater than or equal to a second number threshold within a preset time period, and extract voltage data of other meters within the preset time period.

10. The system according to claim 9, characterized in that The data judgment module is further used to determine that the voltage of other meters is within a preset voltage range for a number of consecutive days greater than or equal to a second number threshold value within a preset time period, and if the voltage of other meters is within the preset voltage range for a number of consecutive days greater than or equal to the second number threshold value within the preset time period, it is determined that the preset voltage state is met; If the voltage of other meters does not fall within the preset voltage range for a number of consecutive days greater than or equal to the second number threshold within the preset time period, it is determined that the preset voltage state is not met.

Images