A method and system for detecting abnormal contact in a measuring device

Abstract

This invention provides a method and system for detecting abnormal contact in metering devices. The method includes: extracting current and voltage data from the metering device within a preset time period; extracting data points from the current and voltage data according to preset extraction criteria; determining whether judgment conditions are met based on the number of extracted data points and the number of days in 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 a preset voltage state; if the preset voltage state is met, determining that the metering device has normal contact; if the preset voltage state is not met and the device is not a low-voltage load switch, determining that the metering device has abnormal contact. This invention can promptly detect low voltage and poor contact from hundreds of millions of metering devices. If applied to a system, it can achieve real-time online monitoring of low voltage, saving manpower and resources, reducing economic losses for the power sector, and preventing power fire accidents.

Description

Technical Field

[0001] This invention relates to the field of power system automation technology, and in particular to a method and system for detecting abnormal contact in metering devices. Background Technology

[0002] Poor contact at the live wire inlet of metering devices and at voltage connectors in junction boxes not only leads to underreporting of electricity consumption and losses of state-owned assets, but also poses a risk of fires, even igniting the meter box and causing electrical accidents such as leaks. Therefore, timely and accurate detection of this hidden danger is crucial and urgent. Currently, there are two main methods for identifying this anomaly. One is to check on-site whether the voltage at the metering device's inlet is higher than the voltage displayed on the meter, or to find abnormalities such as sparking or blackening at the contact points of the voltage connectors and lugs in the junction box. However, given the hundreds of millions of meters in the power sector and the shortage of manpower, this method is time-consuming and labor-intensive, and obviously difficult to detect anomalies in a timely manner. The other method is big data analysis, which identifies the anomaly by identifying the low voltage displayed by meters with poor contact. However, low voltage can be caused by factors other than poor contact in metering devices, such as excessively long power supply radius or faulty voltage components. This is the main reason why the industry has been stagnant in identifying poor contact. Summary of the Invention

[0003] The purpose of this invention is to provide a method and system for detecting abnormal contact in a measuring device, thereby solving the technical problem of how to detect poor contact in a measuring device.

[0004] On the one hand, a method for detecting abnormal contact in a measuring device is provided, comprising:

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

[0006] Data points are extracted from the current and voltage data according to the preset extraction criteria, and the judgment conditions are determined based on the number of extracted data points and the number of days in which the data points are located.

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

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

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

[0010] Preferably, the judgment conditions include that the number of extracted data points 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.

[0011] Preferably, determining whether the voltage of the metering device meets the preset voltage state within a preset time period includes judging whether the target meter has a voltage within a preset voltage range for a number of consecutive days that are greater than or equal to a second quantity threshold within the preset time period.

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

[0013] Preferably, the method further includes: if the target meter has a voltage range within a preset voltage range for a number of consecutive days greater than or equal to a second quantity threshold within a preset time period, then extract all time points within the preset voltage range for the target meter during the consecutive days, and extract voltage data from other meters within the preset time period.

[0014] Preferably, the method further includes determining that other meters have voltage values ​​within a preset voltage range for a number of consecutive days greater than or equal to a second quantity threshold within a preset time period. If other meters have voltage values ​​within a preset voltage range for a number of consecutive days greater than or equal to the second quantity threshold within a preset time period, then the preset voltage state is determined to be satisfied. If other meters do not have voltage values ​​within a preset voltage range for a number of consecutive days greater than or equal to the second quantity threshold within a preset time period, then the preset voltage state is determined to be unsatisfactory.

[0015] On the other hand, a system for detecting abnormal contact in a measuring device is also provided, and a method for detecting abnormal contact in a measuring device is also provided, including,

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

[0017] The data judgment module is used to extract data points from current and voltage data according to preset extraction standards, and to determine whether the judgment conditions are met based on the number of extracted data points and the number of days in which the data points are located.

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

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

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

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

[0022] Preferably, the data judgment module is further configured to: if 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 quantity threshold within a preset time period, then extract all time points in which the voltage of the target meter is within the preset voltage range for the consecutive days, and extract the voltage data of other meters within the preset time period.

[0023] Preferably, the data judgment module is further configured to determine whether other meters have voltage values ​​within a preset voltage range for a number of consecutive days greater than or equal to a second quantity threshold within a preset time period. If other meters have voltage values ​​within a preset voltage range for a number of consecutive days greater than or equal to the second quantity threshold within a preset time period, the preset voltage state is determined to be satisfied. If other meters do not have voltage values ​​within a preset voltage range for a number of consecutive days greater than or equal to the second quantity threshold within a preset time period, the preset voltage state is determined to be unsatisfactory.

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

[0025] The method and system for detecting abnormal contact in metering devices provided by this invention can promptly detect low voltage issues from hundreds of millions of metering devices. When applied to a system, it enables real-time online monitoring of low voltage. Compared to current manual checks, this method saves manpower and resources, reduces economic losses for the power sector, and prevents electrical fires and other safety accidents. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of the present invention.

[0027] Figure 1 This is a schematic diagram of the main process of a method for detecting abnormal contact of a measuring device in an embodiment of the present invention.

[0028] Figure 2This is a logical schematic diagram of a method for detecting abnormal contact in a metering device according to an embodiment of the present invention. Detailed Implementation

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

[0030] like Figure 1 and Figure 2 The diagram shown is a schematic representation of an embodiment of a method for detecting abnormal contact in a measuring device provided by the present invention. In this embodiment, the method includes the following steps:

[0031] Step S1: Extract the current and voltage data of the metering device within a preset time period; understandably, extract the current and voltage data of the meter and other meters in the same meter box over the past 7 days. The preset time period can be set according to specific circumstances; in this embodiment, it is set to 7 days.

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

[0033] Step S2: Extract data points from the current and voltage data according to preset extraction criteria, and determine whether the judgment conditions are met based on the number of extracted data points and the number of days in which the data points are located. Specifically, the judgment conditions include that the number of extracted data points exceeds a preset first threshold, and the number of days in which the data points are located is greater than or equal to a preset second threshold. For example, it can be determined whether the number of extracted data points exceeds 7 and the number of days in which the data points are located is greater than or equal to 3. If not, it is determined that the judgment conditions are not met.

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

[0035] In one embodiment, determining whether the voltage of the metering device meets a preset voltage state within a preset time period includes: determining whether the target meter has a voltage range within a preset voltage range for a consecutive number of days greater than or equal to a second threshold number within the preset time period; if the target meter does not have a voltage range within a preset voltage range for a consecutive number of days greater than or equal to the second threshold number within the preset time period, then the low voltage is determined to be caused by an excessively long power supply radius. If the target meter has a voltage range within a preset voltage range for a consecutive number of days greater than or equal to the second threshold number within the preset time period, then all time points when the voltage of the target meter is within the preset voltage range for the consecutive days are extracted, and voltage data of other meters within the preset time period are also extracted. If other meters have a number of consecutive days with a voltage greater than or equal to a second threshold value within a preset time period that are within a preset voltage range, then the preset voltage condition is determined to be met; otherwise, if other meters do not have a number of consecutive days with a voltage greater than or equal to the second threshold value within a preset time period that are within a preset voltage range, then the preset voltage condition is determined to be unmet.

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

[0037] Embodiments of the present invention also provide a system for detecting abnormal contact in a measuring device, and a method for detecting abnormal contact in a measuring device, comprising,

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

[0039] The data judgment module is used to extract data points from current and voltage data according to preset extraction standards, and to determine whether the judgment conditions are met based on the number of extracted data points and the number of days in which the data points are located.

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

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

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

[0043] In a specific embodiment, the data judgment module is further configured to: if the target meter has voltage within a preset voltage range for a consecutive number of days greater than or equal to a second threshold within a preset time period, then extract all time points within the preset voltage range for the target meter during the consecutive days, and extract voltage data from other meters within the preset time period. The data judgment module is also configured to: determine if other meters have voltage within a preset voltage range for a consecutive number of days greater than or equal to the second threshold within a preset time period; if other meters have voltage within a preset voltage range for a consecutive number of days greater than or equal to the second threshold within a preset time period, then the preset voltage state is satisfied; if other meters do not have voltage within a preset voltage range for a consecutive number of days greater than or equal to the second threshold within a preset time period, then the preset voltage state is not satisfied.

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

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

[0046] The method and system for detecting abnormal contact in metering devices provided by this invention can promptly detect low voltage issues from hundreds of millions of metering devices. When applied to a system, it enables real-time online monitoring of low voltage. Compared to current manual checks, this method saves manpower and resources, reduces economic losses for the power sector, and prevents electrical fires and other safety accidents.

[0047] The above description discloses only preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A method for detecting abnormal contact in a measuring device, characterized in that, include: Extract current and voltage data from the metering device within a preset time period; Data points are extracted from the current and voltage data according to the preset extraction criteria, and the judgment conditions are determined based on the number of extracted data points and the number of days in which the data points are located. If the judgment conditions are met, then determine whether the voltage of the metering device within the preset time period meets the preset voltage state. If the preset voltage condition is met, the metering device is considered to be in normal contact. If the preset voltage condition is not met and the switch is not a low-voltage load switch, the metering device is judged to have abnormal contact.

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

3. The method as described in claim 2, characterized in that, The judgment conditions include that the number of extracted data points 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 as described in claim 3, characterized in that, The step of determining whether the voltage of the metering device meets the preset voltage state within a preset time period includes determining whether the target meter has a voltage within a preset voltage range for a number of consecutive days that are greater than or equal to a second quantity threshold. If the target meter does not have a number of consecutive days with a voltage greater than or equal to the second quantity threshold within a preset time period that are within the preset voltage range, then the low voltage is determined to be caused by an excessively long power supply radius.

5. The method as described in claim 4, characterized in that, It also includes the following: if the target meter has a voltage range within a preset voltage range for a number of consecutive days that are greater than or equal to the second quantity threshold within a preset time period, then extract all time points within the preset voltage range for the target meter during the consecutive days, and extract the voltage data of other meters within the preset time period.

6. The method as described in claim 5, characterized in that, It also includes determining that other meters have voltages within a preset voltage range for a number of consecutive days greater than or equal to a second quantity threshold within a preset time period. If other meters have voltages within a preset voltage range for a number of consecutive days greater than or equal to the second quantity threshold within a preset time period, then it is determined that the preset voltage state is met. If other meters do not have a number of consecutive days with a voltage greater than or equal to the second quantity threshold within a preset time period that are within a preset voltage range, then the preset voltage state is determined not to be met.

7. A system for detecting abnormal contact in a measuring device, for implementing the method as described in any one of claims 1-6, characterized in that, include, The data extraction module is used to extract the current and voltage data of the metering device within a preset time period; The data judgment module is used to extract data points from current and voltage data according to preset extraction standards, and to determine whether the judgment conditions are met based on the number of extracted data points and the number of days in which the data points are located. The data processing module is used to determine whether the voltage of the metering device within a preset time period meets the preset voltage state if the judgment conditions are met. If the preset voltage condition is met, the metering device is considered to be in normal contact. If the preset voltage condition is not met and the switch is not a low-voltage load switch, the metering device is judged to have abnormal contact.

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

9. The system as described in claim 8, characterized in that, The data judgment module is also used to extract all time points in which 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 quantity threshold within a preset time period, and to extract the voltage data of other meters within the preset time period.

10. The system as described in claim 9, characterized in that, The data judgment module is also used to determine whether other meters have a voltage range within a preset voltage range for a number of consecutive days greater than or equal to the second quantity threshold within a preset time period. If other meters have a voltage range within a preset voltage range for a number of consecutive days greater than or equal to the second quantity threshold within a preset time period, then the preset voltage state is determined to be satisfied. If other meters do not have a number of consecutive days with a voltage greater than or equal to the second quantity threshold within a preset time period that are within a preset voltage range, then the preset voltage state is determined not to be met.

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