A method of identifying the wiring state of an electricity metering device

Abstract

The application provides a method for identifying the wiring state of an electric energy metering device, comprising: obtaining the equipment parameters of a target electric energy metering device; when the target electric energy metering device is identified as a single-phase meter, judging whether the current daily energy data is empty, judging whether the maximum current value of the target electric energy metering device is greater than a preset first current threshold value; judging whether the minimum current value is less than or equal to a preset second current threshold value and whether the number of times that the minimum current value is less than 0 is greater than or equal to a preset number threshold value; when the minimum current value is less than or equal to the preset second current threshold value and the number of times that the minimum current value is less than 0 is greater than or equal to the preset number threshold value, judging whether the daily line loss amount of the current daily energy data for consecutive days is greater than a degree threshold value; when the daily line loss amount of the current daily energy data for consecutive days fails to be greater than the preset degree threshold value, judging whether the meter code data satisfies a preset judgment condition, and if the judgment condition is satisfied, it is determined that the wiring is reversed. The application has high identification accuracy, is simple and has strong operability.

Description

Technical Field

[0001] This invention relates to the field of electrical energy metering device wiring technology, and in particular to a method for identifying the wiring status of an electrical energy metering device. Background Technology

[0002] Accurate metering of electricity is crucial to the economic interests of both power companies and users. When the incoming and outgoing lines of a single-phase meter's live wire are reversed, the user's electricity consumption is recorded as reverse active power. Currently, the electricity industry's billing and settlement system is based on the meter's forward active power. This reverse active power consumption is not settled promptly (it can be added back later if discovered), and in some cases, it goes undetected even until the meter is replaced. This represents an economic loss for the power supply company.

[0003] Currently, the power industry primarily identifies reversed single-phase meter connections by checking if the meter's current is negative. Since photovoltaic (PV) power plants' installation points are both the lines supplying load to and supplying load to the power grid, when their power generation exceeds their consumption, the meter current is negative when supplying load. In this case, relying solely on negative current can easily lead to misdiagnosis, resulting in incorrect on-site inspections and wasted resources. Furthermore, due to limitations in terminal transmission capacity, current data for a significant number of single-phase meters cannot be collected, making it impossible to determine wiring correctness based on negative current readings. With as many as 3.6 million single-phase meters in large and medium-sized cities, and given the shortage of manpower, it's difficult to manually check each meter for reversed connections. Therefore, by the time reversed single-phase meters are discovered, tens or even hundreds of thousands of kilowatt-hours of unregistered electricity have often been missed, significantly increasing the workload for subsequent electricity recovery efforts. Summary of the Invention

[0004] The purpose of this invention is to provide a method for identifying the wiring status of an electricity metering device, and to solve the technical problem of how to determine whether a three-phase meter is connected in reverse by observing the positive and negative values ​​of the current.

[0005] On the one hand, a method for identifying the wiring status of an electricity metering device is provided, including:

[0006] Obtain the equipment parameters of the target electricity metering device, and identify whether the target electricity metering device is a single-phase meter based on the equipment parameters;

[0007] When the target energy metering device is identified as a single-phase meter, the daily current and energy consumption data obtained by the target energy metering device from the metering master station within a preset time period are extracted; it is determined whether the daily current and energy consumption data is empty, and whether the maximum current value of the target energy metering device is greater than a preset first current threshold.

[0008] When the daily current data is not empty and the maximum current value of the target energy metering device is not greater than the preset first current threshold, determine whether the minimum current value of the target energy metering device is less than or equal to the preset second current threshold and whether the number of times the minimum current value is less than 0 is greater than or equal to the preset number threshold.

[0009] When the minimum current value is less than or equal to a preset second current threshold and the number of times the minimum current value is less than 0 is greater than or equal to a preset number threshold, whether the daily line loss of the current daily power data for multiple consecutive days is greater than a preset degree threshold.

[0010] When the daily line loss in the current and daily electricity data fails to exceed the preset threshold for multiple consecutive days, the meter reading data of the target electricity metering device is obtained, and it is determined whether the meter reading data meets the preset judgment condition. If the judgment condition is met, it is determined that the connection is reversed.

[0011] Preferably, determining whether the daily electricity consumption data is empty includes:

[0012] Determine whether the number of times the current in the daily electricity consumption data of the target electricity metering device is not equal to 0 is greater than a preset threshold for the number of times it is not empty;

[0013] If the number of times the current in the daily electricity consumption data is not equal to 0 is greater than the preset threshold for the number of times it is not empty, then the daily electricity consumption data is determined to be not empty.

[0014] If the number of times the current is not equal to 0 in the daily current energy data is not greater than the preset threshold for the number of times it is not empty, then the daily current energy data is determined to be empty.

[0015] Preferably, it further includes:

[0016] The identification process ends when the daily electricity consumption data is determined to be empty.

[0017] Preferably, it further includes:

[0018] The identification process ends when the maximum current value of the target power metering device is greater than the preset first current threshold.

[0019] Preferably, it further includes:

[0020] The identification process ends when the minimum current value is not less than or equal to a preset second current threshold or when the number of times the minimum current value is less than 0 is not greater than or equal to a preset number threshold.

[0021] Preferably, it further includes:

[0022] The identification process ends when the daily line loss in the current and daily electricity consumption data exceeds a preset threshold for multiple consecutive days.

[0023] Preferably, obtaining the meter reading data of the target electricity metering device includes:

[0024] Obtain the forward meter code, reverse meter code, and forward meter code at the time of installation of the target electricity metering device on the verification date.

[0025] Preferably, the preset judgment conditions include:

[0026] The difference between the current forward code and the forward code at the time of installation is less than the preset difference threshold;

[0027] The sum of the difference between the current reverse table key and the current forward table key, plus the forward table key at the time of installation, is greater than or equal to the preset table key quantity threshold.

[0028] The percentage of the difference between the current forward code and the forward code at installation time divided by the current reverse code is less than or equal to a preset percentage threshold.

[0029] Preferably, it further includes:

[0030] The identification process ends when the table code data does not meet any of the judgment conditions.

[0031] In summary, implementing the embodiments of the present invention has the following beneficial effects:

[0032] The method for identifying the wiring status of electricity metering devices provided by this invention, based on positive and negative meter codes, identifies reversed single-phase meter connections, solving the problem that it is difficult to accurately identify whether a single-phase meter is connected incorrectly by simply relying on the positive and negative values ​​of the current. It boasts high accuracy, simplicity, and ease of operation. While helping power companies save energy and increase efficiency, generating significant economic benefits, it also effectively improves the daily operation and management level and line loss management level of power companies. Attached Figure Description

[0033] 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.

[0034] Figure 1 This is a schematic diagram of the main flow of a method for identifying the wiring status of an electricity metering device in an embodiment of the present invention.

[0035] Figure 2 This is a logical schematic diagram of a method for identifying the wiring status of an electricity metering device according to an embodiment of the present invention. Detailed Implementation

[0036] 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.

[0037] like Figure 1 Figures 1 and 2 are schematic diagrams of an embodiment of a method for identifying the wiring status of an electricity metering device provided by the present invention. In this embodiment, the method includes the following steps:

[0038] Step S1: Obtain the equipment parameters of the target energy metering device, and identify whether the target energy metering device is a single-phase meter based on the equipment parameters; that is, extract meters whose meter type is single-phase. Identifying whether the target energy metering device is a single-phase meter based on the equipment parameters is a common practice in this field and will not be elaborated further here. Data may include: the meter number, multiplier, metering point number, meter code at installation time, forward and reverse meter codes on the verification date, current of the meter from day N-9 to day N (verification date is day N), daily energy consumption of the meter from day N-9 to day N (verification date is day N), meter user type, and user name.

[0039] Step S2: When the target energy metering device is identified as a single-phase meter, extract the daily current and energy consumption data obtained by the target energy metering device from the metering master station within a preset time period; determine whether the daily current and energy consumption data is empty, and determine whether the maximum current value of the target energy metering device is greater than a preset first current threshold; that is, remove the empty daily current and energy consumption data. Whether the daily current and energy consumption data is empty can be determined by whether the number of times the current is not equal to 0 is greater than 5. If yes, continue to the next step; if no, the identification process ends.

[0040] In a specific embodiment, determining whether the daily electricity consumption data is empty includes:

[0041] The system determines whether the number of times the current is not equal to 0 in the daily current data of the target electricity metering device is greater than a preset threshold for the number of non-empty times (set to 5 in this embodiment); if the number of times the current is not equal to 0 in the daily current data is greater than the preset threshold for the number of non-empty times, then the daily current data is determined to be non-empty; if the number of times the current is not equal to 0 in the daily current data is not greater than the preset threshold for the number of non-empty times, then the daily current data is determined to be empty.

[0042] Specifically, the identification process ends when the daily electricity consumption data is determined to be empty.

[0043] Step S3: When the daily current consumption data is not empty and the maximum current value of the target energy metering device is not greater than the preset first current threshold, determine whether the minimum current value of the target energy metering device is less than or equal to the preset second current threshold and whether the number of times the minimum current value is less than 0 is greater than or equal to the preset number threshold; that is, determine whether the maximum current value of the meter is greater than 3A. If yes, the identification process ends. If no, determine whether the minimum current value of the meter is less than or equal to -1A and whether the number of times the current is less than 0 is greater than or equal to 3. If yes, proceed to the next step. If no, the identification process ends.

[0044] In a specific embodiment, the identification process ends when the maximum current value of the target power metering device is greater than the preset first current threshold (set to 3A in this embodiment).

[0045] Specifically, the identification process ends when the minimum current value is not less than or equal to a preset second current threshold (set to -1A in this embodiment) or the number of times the minimum current value is less than 0 is not greater than or equal to a preset number threshold (set to 3 times in this embodiment).

[0046] Step S4: When the minimum current value is less than or equal to a preset second current threshold and the number of times the minimum current value is less than 0 is greater than or equal to a preset number threshold, check whether the daily line loss of the meter in the daily electricity data for multiple consecutive days is greater than a preset degree threshold; that is, determine whether the daily line loss of the meter for three consecutive days on the verification day N, N-1, and N-2 is greater than 0.5 degrees. If yes, the identification process ends; if no, proceed to the next step.

[0047] In a specific embodiment, the identification process ends when the daily line loss in the current and electricity data is greater than a preset degree threshold (set to 0.5 degrees in this embodiment) for several consecutive days (set to 3 days in this embodiment).

[0048] Step S5: When the daily line loss of the current and daily electricity consumption data fails to exceed the preset threshold for multiple consecutive days, the meter reading data of the target electricity metering device is obtained, and it is determined whether the meter reading data meets the preset judgment condition. If the judgment condition is met, it is determined that the connection is reversed.

[0049] In a specific embodiment, obtaining the meter code data of the target energy metering device includes: obtaining the forward meter code, reverse meter code, and forward meter code of the target energy metering device on the verification date.

[0050] Specifically, the preset judgment conditions include:

[0051] The difference between the current forward code and the forward code at the time of installation is less than the preset difference threshold;

[0052] The sum of the difference between the current reverse table key and the current forward table key, plus the forward table key at the time of installation, is greater than or equal to the preset table key quantity threshold.

[0053] The percentage of the difference between the current forward code and the forward code at installation time divided by the current reverse code is less than or equal to a preset percentage threshold.

[0054] Specifically, the identification process ends when the table code data does not meet any of the judgment conditions.

[0055] Understandably, does the meter meet all of the following conditions:

[0056] 1. The difference between (the current forward list key and the forward list key at the time of installation) is less than 5;

[0057] 2. (Current reverse meter code - Current forward meter code + Forward meter code at the time of meter installation) is greater than or equal to 50;

[0058] 3. The percentage of (current forward meter code - forward meter code at the time of meter installation) / current reverse meter code is less than or equal to 3%. If not, the identification process ends; if so, the meter is connected in reverse.

[0059] In summary, implementing the embodiments of the present invention has the following beneficial effects:

[0060] The method for identifying the wiring status of electricity metering devices provided by this invention, based on positive and negative meter codes, identifies reversed single-phase meter connections, solving the problem that it is difficult to accurately identify whether a single-phase meter is connected incorrectly by simply relying on the positive and negative values ​​of the current. It boasts high accuracy, simplicity, and ease of operation. While helping power companies save energy and increase efficiency, generating significant economic benefits, it also effectively improves the daily operation and management level and line loss management level of power companies.

[0061] 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 identifying the wiring status of an electricity metering device, characterized in that, include: Obtain the equipment parameters of the target electricity metering device, and identify whether the target electricity metering device is a single-phase meter based on the equipment parameters; When the target energy metering device is identified as a single-phase meter, the daily current and energy consumption data obtained by the target energy metering device from the metering master station within a preset time period are extracted; it is determined whether the daily current and energy consumption data is empty, and whether the maximum current value of the target energy metering device is greater than a preset first current threshold. When the daily current data is not empty and the maximum current value of the target energy metering device is not greater than the preset first current threshold, determine whether the minimum current value of the target energy metering device is less than or equal to the preset second current threshold and whether the number of times the minimum current value is less than 0 is greater than or equal to the preset number threshold. When the minimum current value is less than or equal to a preset second current threshold and the number of times the minimum current value is less than 0 is greater than or equal to a preset number threshold, it is determined whether the daily line loss of the current daily power data for multiple consecutive days is greater than a preset degree threshold. When the daily line loss in the current and daily electricity consumption data fails to exceed the preset threshold for multiple consecutive days, the meter reading data of the target electricity metering device is obtained, and it is determined whether the meter reading data meets the preset judgment condition. If the judgment condition is met, it is determined that the connection is reversed. The step of determining whether the daily current consumption data is empty includes: determining whether the number of times the current is not equal to 0 in the daily current consumption data of the target energy metering device is greater than a preset threshold for the number of times it is not empty; if the number of times the current is not equal to 0 in the daily current consumption data is greater than the preset threshold for the number of times it is not empty, then the daily current consumption data is determined to be not empty; if the number of times the current is not equal to 0 in the daily current consumption data is not greater than the preset threshold for the number of times it is not empty, then the daily current consumption data is determined to be empty. Obtaining the meter reading data of the target energy metering device includes: obtaining the forward meter reading, reverse meter reading, and forward meter reading of the target energy metering device on the verification date; The preset judgment conditions include: The difference between the current forward code and the forward code at the time of installation is less than the preset difference threshold; The sum of the difference between the current reverse table key and the current forward table key, plus the forward table key at the time of installation, is greater than or equal to the preset table key quantity threshold. The percentage of the difference between the current forward code and the forward code at installation time divided by the current reverse code is less than or equal to a preset percentage threshold.

2. The method as described in claim 1, characterized in that, Also includes: The identification process ends when the daily electricity consumption data is determined to be empty.

3. The method as described in claim 1, characterized in that, Also includes: The identification process ends when the maximum current value of the target power metering device is greater than the preset first current threshold.

4. The method as described in claim 1, characterized in that, Also includes: The identification process ends when the minimum current value is not less than or equal to a preset second current threshold or when the number of times the minimum current value is less than 0 is not greater than or equal to a preset number threshold.

5. The method as described in claim 1, characterized in that, Also includes: The identification process ends when the daily line loss in the current and daily electricity data exceeds a preset threshold for multiple consecutive days.

6. The method as described in claim 5, characterized in that, Also includes: The identification process ends when the table code data does not meet any of the judgment conditions.

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