Fault detection method and system for electric energy metering device

Abstract

The invention discloses a fault detection method and system for an electric energy metering device. The fault detection method of the electric energy metering device comprises the following steps: acquiring a historical electric energy metering data table and a current day electric energy metering data table of the electric energy metering device; determining an electric energy change metering data table in the electric energy metering data of the current day according to the electric energy metering data table of the current day and the historical electric energy metering data table; and determining the fault type of the electric energy metering device according to the state of the fault screening item in the electric energy change metering data table. According to the invention, the efficiency and accuracy of fault detection are effectively improved, and stable operation of a power system is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power systems, and in particular to a fault detection method and system for an electric energy metering device. Background Art

[0002] Through accurate energy metering, power grid companies can gain a deep understanding of the operating status of the power system, identify and solve energy consumption anomalies in a timely manner, and effectively control operating costs. However, failures in energy metering devices are inevitable, due to factors such as the equipment itself (such as manufacturing quality, aging and wear), the external operating environment, external interference, and overload operation.

[0003] The existing methods for fault detection of electric energy metering devices are mainly manual inspection, instrument detection, data analysis, etc. However, these methods have the problems of low troubleshooting efficiency and high verification error rate. Summary of the invention

[0004] The present invention provides a fault detection method and system for an electric energy metering device, so as to improve the efficiency and accuracy of fault detection of the electric energy metering device.

[0005] According to one aspect of the present invention, a fault detection method for an electric energy metering device is provided, comprising:

[0006] Obtain the historical electric energy metering data table and the current day electric energy metering data table of the electric energy metering device;

[0007] Determine the electric energy change metering data table in the electric energy metering data of the current day according to the electric energy metering data table of the current day and the historical electric energy metering data table;

[0008] The fault type of the electric energy metering device is determined according to the status of the fault screening item in the electric energy change metering data table.

[0009] According to another aspect of the present invention, there is provided a fault detection system for an electric energy metering device, comprising:

[0010] A data acquisition module, used to acquire the historical electric energy metering data table and the current electric energy metering data table of the electric energy metering device;

[0011] An electric energy change metering module, used for determining the electric energy change metering data table in the electric energy metering data of the current day according to the electric energy metering data table of the current day and the historical electric energy metering data table;

[0012] The fault type determination module is used to determine the fault type of the electric energy metering device according to the state of the fault screening item in the electric energy change metering data table.

[0013] The embodiment of the present invention generates an electric energy change metering data table based on data comparison between the historical electric energy metering data table and the current electric energy metering data table of the electric energy metering device, and then analyzes the status of the screening items in the electric energy change metering data table to determine the fault type, thereby effectively improving the efficiency and accuracy of fault detection and ensuring the stable operation of the power system and the rational use of resources.

[0014] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A flowchart of a fault detection method for an electric energy metering device provided by an embodiment of the present invention;

[0017] Figure 2 A flowchart of another fault detection method for an electric energy metering device provided by an embodiment of the present invention;

[0018] Figure 3 A flowchart of another fault detection method for an electric energy metering device provided by an embodiment of the present invention;

[0019] Figure 4 A flowchart of another fault detection method for an electric energy metering device provided by an embodiment of the present invention;

[0020] Figure 5 A flowchart of another fault detection method for an electric energy metering device provided by an embodiment of the present invention;

[0021] Figure 6 A schematic structural diagram of a fault detection system for an electric energy metering device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0024] Figure 1 This is a flow chart of a method for detecting a fault in an electric energy metering device provided by an embodiment of the present invention. This embodiment can be applied to detecting whether an electric energy metering device has a fault. The method can be executed by a fault detection system for an electric energy metering device, and the fault detection system for an electric energy metering device can be configured in a power network. Figure 1 As shown, the method includes:

[0025] S110, obtaining a historical electric energy metering data table and a current electric energy metering data table of the electric energy metering device.

[0026] The electric energy metering device refers to a device that measures electric energy consumption. For example, the electric energy metering device may be an electronic meter. The historical electric energy metering data table refers to the electric energy consumption data recorded by the electric energy metering device within a certain time range, which may include electric energy consumption records of daily, monthly, annual and other periods. For example, it includes abnormal record tables, meter reading information and metering point information tables. The current day electric energy metering data table refers to the real-time electric energy consumption data of the electric energy metering device within the current date, which reflects the electric energy consumption of the user on that day and is used for daily monitoring and real-time analysis.

[0027] Specifically, the marketing database is initialized to ensure the integrity and accuracy of the data, and the historical power metering data table and the current day power metering data table of the power metering device to be used later are registered, that is, the specific values, timestamps and other relevant information of the historical power metering data and the current day power metering data are entered into the corresponding tables for subsequent access and use of these data. Then, the historical power metering data table and the current day power metering data table of the power metering device are obtained from the marketing database to fully understand the power consumption and change trend of the power equipment, and provide a reliable data basis for subsequent analysis.

[0028] S120: Determine an electric energy change metering data table in the electric energy metering data of the current day according to the electric energy metering data table of the current day and the historical electric energy metering data table.

[0029] Among them, the electric energy change metering data table refers to an electronic table that records the changes between the electric energy metering data of the day and the historical electric energy metering data. The table is used to record in detail the changes in the electricity consumption data of the electric energy metering equipment within a specific time period.

[0030] Specifically, through the dynamic comparative analysis of the current day's energy metering data table and the historical energy metering data table, the change trend of the data recorded in the energy metering equipment can be identified in a timely manner, thereby effectively capturing the potential abnormalities of the energy metering equipment. Then, the changed data is recorded in the energy change metering data table to provide a data basis for subsequent fault analysis and narrow the scope of fault screening.

[0031] S130. Determine the fault type of the electric energy metering device according to the status of the fault screening item in the electric energy change metering data table.

[0032] Among them, the fault screening item refers to the index or parameter related to the equipment performance identified in the electric energy change metering data table, which is used to preliminarily determine whether the electric energy metering device has a fault. The fault type refers to the possible fault category of the electric energy metering device obtained based on the status analysis of the fault screening item. For example, the fault type may be equipment aging, metering failure, etc.

[0033] Specifically, setting reasonable fault screening items can quickly narrow the scope of fault troubleshooting, focus on areas where problems may exist, and improve the efficiency of fault handling. When a fault is found in the energy metering device, the fault can be handled in a timely manner to improve the reliability of the device.

[0034] The embodiment of the present invention generates an electric energy change metering data table based on data comparison between the historical electric energy metering data table and the current electric energy metering data table of the electric energy metering device, and then analyzes the status of the screening items in the electric energy change metering data table to determine the fault type, thereby effectively improving the efficiency and accuracy of fault detection and ensuring the stable operation of the power system and the rational use of resources.

[0035] Figure 2 A flowchart of another fault detection method for an electric energy metering device provided by an embodiment of the present invention. The fault screening item includes an operation metering point item. Based on the above embodiments, S130 is optionally refined, such as Figure 2 As shown, the method includes:

[0036] S110, obtaining a historical electric energy metering data table and a current electric energy metering data table of the electric energy metering device.

[0037] The operating metering point item refers to the real-time data of each measuring point in the electric energy metering device. The data of these metering points can be used to analyze the input and output of electric energy and help identify power consumption patterns and abnormal situations.

[0038] S120: Determine an electric energy change metering data table in the electric energy metering data of the current day according to the electric energy metering data table of the current day and the historical electric energy metering data table.

[0039] S131. Screen the operation metering point items in the electric energy change metering data table.

[0040] Specifically, in the electric energy change metering data table, the operation metering point items are screened, the changes in the recorded data are analyzed, and a preliminary assessment is made on the operation status of the electric energy metering device.

[0041] S132. When the reverse electric quantity of the running metering point item is greater than zero, it is determined that the fault type of the electric energy metering device is a wiring error fault.

[0042] Among them, reverse power refers to the amount of current or power recorded by the power metering device that flows in the opposite direction to the expected direction. Usually, the power metering device monitors the amount of power flowing from the power grid to the user, and reverse power means that the current flows in the opposite direction. A wiring error fault refers to incorrect wiring configuration of the power metering device, resulting in inaccurate measurement results or wrong current direction. The fault record corresponding to the wiring error fault can be written into the key inspection detail list table.

[0043] Specifically, by monitoring the reverse electric quantity, the wiring error fault of the electric energy metering device can be quickly identified and then repaired.

[0044] The embodiment of the present invention determines whether the fault type of the electric energy metering device is a wiring error fault by running the reverse electric quantity of the metering point item, which can reduce the complexity of fault troubleshooting and reduce the time and manpower cost required for fault troubleshooting.

[0045] Figure 3 A flowchart of another method for fault detection of an electric energy metering device provided by an embodiment of the present invention. The fault screening items include user status items and meter reading items. Based on the above embodiments, S130 may be optionally refined, such as Figure 3 As shown, the method includes:

[0046] S110, obtaining a historical electric energy metering data table and a current electric energy metering data table of the electric energy metering device.

[0047] Among them, the user status item refers to the monitoring indicators related to the power consumption of the power user. For example, the user status item can be "running", which means that the user's equipment is in operation and the electric energy metering device can normally record the user's daily power consumption and voltage and current changes. The meter reading item refers to the specific record of the power consumption data of each meter reading in the electric energy metering, including the reading of the electric energy meter at a specific time point, the secondary value of voltage and the secondary value of current, etc., which are used for electricity fee calculation and power consumption analysis.

[0048] S120: Determine an electric energy change metering data table in the electric energy metering data of the current day according to the electric energy metering data table of the current day and the historical electric energy metering data table.

[0049] S133. Screening user status items and meter reading items in the electric energy change metering data table.

[0050] Specifically, by screening user status items and meter reading items, the fault detection system of the electric energy metering device can grasp in real time whether the user equipment detected by the electric energy metering device is online, and analyze whether there are abnormalities in the electric energy data recorded in the meter reading items, providing a data basis for subsequent processes.

[0051] S134. Determine whether the fault type of the electric energy metering device is a voltage loss fault according to the user status item and the voltage secondary value and the current secondary value in the meter reading item.

[0052] Among them, the secondary value of voltage refers to the voltage signal obtained after the transformer conversion, which is measured by the electric energy metering device and usually reflects the actual voltage level. The secondary value of current refers to the current signal obtained after the transformer conversion, which is measured by the electric energy metering device and usually reflects the actual current level. A voltage loss fault refers to the loss of voltage or abnormal drop in voltage during the operation of the electric energy metering device. This fault may cause the equipment to fail to work properly, affect the accurate measurement of electric energy, and may even cause more serious power system failures. The fault record corresponding to the voltage loss fault can be written into the key inspection detail list table.

[0053] Specifically, by analyzing the secondary values ​​of voltage and current, it is possible to accurately determine whether a voltage loss fault occurs in the electric energy metering device, which is conducive to quickly locating the problem and improving the efficiency of fault diagnosis.

[0054] Optionally, when the secondary voltage value is less than a preset voltage value, it is determined that the fault type of the electric energy metering device is a voltage loss fault.

[0055] The preset voltage value refers to the lower limit of the normal working voltage set according to the design standard and operation requirements of the power system. When the secondary voltage value is lower than the preset value, it is considered that the electric energy metering device has a voltage loss fault. For example, the preset voltage value can be 90% of the rated voltage.

[0056] Exemplarily, when the metering mode of the electric energy metering device is high supply and high timing, if the detected voltage secondary value is lower than 90% of the rated voltage (100V), it is judged that the electric energy metering device has a voltage loss fault. When the metering mode of the electric energy metering device is high supply and low timing, if the detected voltage secondary value is lower than 90% of the rated voltage (220V), it is judged that the electric energy metering device has a voltage loss fault. Among them, high supply and low metering refers to a high-voltage power supply system, whose power supply voltage is relatively low, and a transformer is usually used for voltage reduction. Such a system adopts a three-phase four-wire power supply, and the final output voltage is 220V. High supply and high metering refers to a high-voltage power supply system, whose power supply voltage is relatively high, and a three-phase three-wire power supply is usually used. A transformer is not required for voltage reduction, and it is mostly used for power supply of industrial and large equipment. When the metering mode is high supply and high timing, a transformer isolation type voltmeter can be used for high-voltage measurement, which is equipped with a transformer (such as a voltage transformer) inside, which can reduce the high voltage to a safe range (for example, 100V) for accurate measurement.

[0057] Specifically, by setting a preset voltage value, it is possible to quickly determine whether a voltage loss fault occurs in the electric energy metering device, thereby improving the speed and efficiency of fault identification and reducing delays.

[0058] Optionally, when the secondary value of the voltage is equal to 0 and the secondary value of the current is not equal to 0, it is determined that the fault type of the electric energy metering device is a voltage loss fault.

[0059] Specifically, by setting the condition that the voltage secondary value is 0 and the current secondary value is not equal to 0, it is possible to clearly determine whether the electric energy metering device is in a voltage loss state. This method reduces the possibility of subjective judgment, improves the accuracy of fault diagnosis, and ensures that the fault can be handled in a timely manner later.

[0060] Optionally, when the voltage secondary values ​​corresponding to at least three consecutive data collection points are less than a preset voltage value, it is determined that the fault type of the electric energy metering device is a voltage loss fault.

[0061] Continuous data collection points refer to data points that are measured and recorded multiple times for the same monitoring object or parameter within a specific time interval. These data points usually have the same collection conditions and similar environmental backgrounds. For example, a data collection point can be collected every fifteen minutes.

[0062] Specifically, relying solely on a single data point may lead to misjudgment. Setting at least three consecutive points of data can more effectively eliminate the interference of accidental factors, make the judgment more reliable, and avoid erroneous conclusions caused by abnormal fluctuations in a single data point.

[0063] The embodiment of the present invention screens the user status items and meter reading items in the electric energy change metering data table, and combines the analysis of the voltage secondary value and the current secondary value to determine whether the electric energy metering device has a voltage loss fault. The present invention solves the problems of misjudgment and response delay in traditional fault detection methods, can effectively improve the fault detection efficiency and accuracy of the electric energy change metering device, and provides a strong guarantee for the safe operation of the power system.

[0064] Figure 4 A flowchart of another method for detecting a fault of an electric energy metering device provided by an embodiment of the present invention. The fault screening items include general billing items and meter reading cycle items. Based on the above embodiment, S130 may be optionally refined, such as Figure 4 As shown, the method includes:

[0065] S110, obtaining a historical electric energy metering data table and a current electric energy metering data table of the electric energy metering device.

[0066] Among them, general billing items refer to indicators related to electricity usage billing, including information such as the user's electricity consumption, billing standards, and fee calculation. General billing items are usually used for electricity bill settlement and reflect the user's electricity consumption. Meter reading cycle items refer to records of meter readings within a specific time interval, including information such as electricity consumption and timestamps within each meter reading cycle. Exemplarily, the meter reading cycle can be a daily meter reading record or a monthly meter reading record.

[0067] S120: Determine an electric energy change metering data table in the electric energy metering data of the current day according to the electric energy metering data table of the current day and the historical electric energy metering data table.

[0068] S135. Screen general billing items and meter reading cycle items in the electric energy change metering data table.

[0069] Specifically, by screening general billing items and meter reading cycle items, the scope of the fault can be quickly located, providing a data basis for subsequent processes.

[0070] S136. When the secondary value of the current in the meter reading cycle item is equal to zero and there is no electricity refund work order in the fault handling list in the general billing item, it is determined that the fault type of the electric energy metering device is a loss of current fault.

[0071] Among them, the fault handling list refers to a document or database that records and manages equipment fault information in the power system, usually including the fault type and description, the time and place of the fault, relevant equipment information, handling measures and results, responsible persons and handling time, etc. It is mainly used to track and manage the fault handling process to ensure that all faults are resolved in a timely and effective manner, and provide data support for subsequent fault analysis and improvement. The electricity refund work order refers to the record of electricity adjustment caused by metering errors or other reasons. A loss of current fault refers to the failure of the current to flow normally to the metering device during the operation of the electric energy metering device. The fault record corresponding to the loss of current fault can be written into the key inspection detailed list table.

[0072] The secondary value of current reflects the actual current flowing through the electric energy metering device. Under normal circumstances, a normally operating electric energy metering device should record a certain current. If the secondary value of current is equal to zero in the meter reading cycle item, it means that no current passes through the metering device during this time period. If there is no electricity refund work order in the fault handling list at this time, it means that no adjustment due to metering errors or abnormal electricity consumption was recorded during the metering process, that is, the system did not find the electricity adjustment caused by metering errors, and it is inferred that it is a current loss fault.

[0073] Specifically, by setting the conditions that the secondary value of the current is zero and there is no electricity refund work order, the current loss fault can be quickly identified, the time for troubleshooting can be reduced, and the response speed can be improved.

[0074] The embodiment of the present invention screens general billing items and meter reading cycle items to determine whether the electric energy metering device has a current loss fault. The present invention can accurately and quickly identify the current loss fault, reduce the possibility of misjudgment, and thus improve the overall accuracy of fault detection.

[0075] Optionally, S120, determining the electric energy change metering data table in the electric energy metering data of the current day according to the electric energy metering data table of the current day and the historical electric energy metering data table, includes:

[0076] When the difference between the average value of the electric energy metering data in the current day's electric energy metering data table and the electric energy metering data in the historical electric energy metering data table is greater than the preset electric quantity value, the electric energy metering data in the current day's electric energy metering data table is determined to be the electric energy change metering data table.

[0077] The preset value of electricity consumption refers to a threshold value set according to the operation standard of the power system or the historical electricity consumption data of the user, which is used to judge whether the change of electricity consumption is significant. When the difference between the daily electricity metering data and the historical data exceeds this threshold, it indicates that the electricity consumption has changed significantly.

[0078] For example, if you want to determine whether the change in the amount of electricity in a certain period of time in the daily energy metering data table of the day is significant, you can take the corresponding amount of electricity in the same period of time on the date of the historical record from the historical energy metering data table, calculate the average of these electricity values, and take 10% of the average as the preset value of electricity. If the average of the energy metering data in the daily energy metering data table of the day and the energy metering data in the historical energy metering data table exceeds the preset value of electricity, the energy metering data in the daily energy metering data table of the day will be written into the energy change metering data table.

[0079] Specifically, reasonably setting the preset value of electric power can ensure that data with significant changes are written into the electric energy change metering data table, limit the data range in the electric energy change metering data table, and provide a data basis for the subsequent screening process.

[0080] Optionally, S110, obtaining a historical electric energy metering data table and a current electric energy metering data table of the electric energy metering device, including:

[0081] Obtain the historical electric energy metering data table and the electric energy metering data table of the current day from the marketing database.

[0082] Among them, the marketing database refers to a database specifically used to store electricity metering data, customer information and marketing activity records related to electricity users.

[0083] Optionally, after S130, determining the fault type of the electric energy metering device according to the state of the fault screening item in the electric energy change metering data table, the method further includes:

[0084] Update the current day's electric energy metering data table to the historical electric energy metering data table.

[0085] Specifically, integrating the current day's electricity metering data into the historical electricity metering data can ensure the continuity of the electricity metering data and provide the latest reference point for subsequent fault detection.

[0086] Figure 5 This is a flow chart of another method for fault detection of an electric energy metering device provided by an embodiment of the present invention. This method can be implemented using a cloud ETL programming tool. Figure 5 As shown, the steps of the method include:

[0087] First, when the difference between the average value of the electric energy metering data in the daily energy metering data table and the electric energy metering data in the historical electric energy metering data table is greater than the preset value of the electric energy, the electric energy metering data in the daily energy metering data table of the day is determined to be the electric energy change metering data table. Then, a fault screening item is set, and the fault screening item includes an operation metering point item, a user status item, a meter reading item, a general billing item, a meter reading cycle item, etc. Then, the data screened out by the logic screening item is judged. If the reverse electric quantity of the operation metering point item is greater than zero, the fault type is determined to be a wiring error fault, and the fault record is written into the key inspection detail list table, marked as "wiring error, metering fault is not handled", otherwise the record is discarded. If the metering mode is high supply and high timing, the voltage secondary value corresponding to three consecutive data points is less than or equal to 90% of the rated voltage secondary value, the fault type is determined to be a loss of pressure fault, and the fault record is written into the key inspection detail list table, marked as "due to the loss of pressure fault of the metering device, the user's electricity is under-metered", otherwise the record is discarded. If the metering method is high supply and low timing, and the voltage secondary values ​​corresponding to three consecutive data points are less than or equal to 90% of the rated voltage secondary value, the fault type is determined to be a loss of voltage fault, and the fault record is written into the key inspection detail list table, marked as "due to the loss of voltage fault of the metering device, the user's electricity is under-metered", otherwise the record is discarded. If the voltage secondary value is equal to 0 and the current secondary value is not equal to 0, the fault type is determined to be a loss of voltage fault, and the fault record is written into the key inspection detail list table, marked as "due to the loss of voltage fault of the metering device, the user's electricity is under-metered", otherwise the record is discarded. If the current secondary value is equal to 0, and there is no electricity refund work order in the fault handling list in the general billing item, the fault type is determined to be a loss of current fault, and the fault record is written into the key inspection detail list table, marked as "due to the loss of current fault of the metering device, the user's electricity is under-metered", otherwise the record is discarded.

[0088] Figure 6 The present invention provides a schematic diagram of a fault detection system for an electric energy metering device. Figure 6 As shown, the system includes:

[0089] The data acquisition module 210 is used to acquire the historical electric energy metering data table and the current electric energy metering data table of the electric energy metering device.

[0090] The electric energy change metering module 220 is used to determine the electric energy change metering data table in the electric energy metering data of the current day according to the electric energy metering data table of the current day and the historical electric energy metering data table;

[0091] The fault type determination module 230 is used to determine the fault type of the electric energy metering device according to the status of the fault screening item in the electric energy change metering data table.

[0092] The fault detection system for an electric energy metering device provided in the embodiment of the present invention can execute the fault detection method for an electric energy metering device provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0093] In some embodiments, the fault screening item includes an operation metering point item; the fault type determination module 230 includes:

[0094] The first screening unit is used to screen the operation metering point items in the electric energy change metering data table;

[0095] The first fault determination unit is used to determine that the fault type of the electric energy metering device is a wiring error fault when the reverse electric quantity of the running metering point item is greater than zero.

[0096] In some embodiments, the fault screening items include user status items and meter reading items; the fault type determination module 230 includes:

[0097] The second screening unit is used to screen the user status items and meter reading items in the electric energy change metering data table;

[0098] The second fault determination unit is used to determine that the fault type of the electric energy metering device is a voltage loss fault according to the user status item and the voltage secondary value and the current secondary value in the meter reading item.

[0099] In some embodiments, the second fault determination unit is specifically used to determine that the fault type of the electric energy metering device is a voltage loss fault when the voltage secondary value is less than a preset voltage value and / or the voltage secondary value is equal to 0 and the current secondary value is not equal to 0.

[0100] In some embodiments, the fault screening items include general billing items and meter reading cycle items; the fault determination module 230 includes:

[0101] The third screening unit is used for screening general billing items and meter reading cycle items in the electric energy change metering data table.

[0102] The third fault determination unit is used to determine that the fault type of the electric energy metering device is a loss of current fault when the secondary value of the current in the meter reading cycle item is equal to zero and there is no electricity refund work order in the fault processing list in the general billing item.

[0103] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0104] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A fault detection method for an electric energy metering device, characterized in that: include: Obtain the historical electric energy metering data table and the current day electric energy metering data table of the electric energy metering device; Determine the electric energy change metering data table in the electric energy metering data of the current day according to the electric energy metering data table of the current day and the historical electric energy metering data table; The fault type of the electric energy metering device is determined according to the status of the fault screening item in the electric energy change metering data table.

2. The fault detection method of the electric energy metering device according to claim 1, characterized in that: The fault screening items include operation metering point items; Determining the fault type of the electric energy metering device according to the state of the fault screening item in the electric energy change metering data table includes: Screening the operation metering point item in the electric energy change metering data table; When the reverse electric quantity of the running metering point item is greater than zero, it is determined that the fault type of the electric energy metering device is a wiring error fault.

3. The fault detection method of the electric energy metering device according to claim 1, characterized in that: The fault screening items include user status items and meter reading items; Determining the fault type of the electric energy metering device according to the state of the fault screening item in the electric energy change metering data table includes: Screening the user status item and the meter reading item in the electric energy change metering data table; Determine whether the fault type of the electric energy metering device is a voltage loss fault according to the user status item and the voltage secondary value and the current secondary value in the meter reading item.

4. The fault detection method of the electric energy metering device according to claim 3, characterized in that: Determining whether the fault type of the electric energy metering device is a voltage loss fault according to the user status item and the voltage secondary value and the current secondary value in the meter reading item includes: When the voltage secondary value is less than a preset voltage value, and / or the voltage secondary value is equal to 0 and the current secondary value is not equal to 0, it is determined that the fault type of the electric energy metering device is a voltage loss fault.

5. The fault detection method of the electric energy metering device according to claim 4, characterized in that: The user status item and the meter reading item include voltage secondary values ​​corresponding to a plurality of data collection points; when the voltage secondary value is less than a preset voltage value, determining that the fault type of the electric energy metering device is a voltage loss fault includes: When the voltage secondary values ​​corresponding to at least three consecutive data collection points are less than a preset voltage value, it is determined that the fault type of the electric energy metering device is a voltage loss fault.

6. The fault detection method of the electric energy metering device according to claim 1, characterized in that: The fault screening items also include general billing items and meter reading cycle items; Determining the fault type of the electric energy metering device according to the state of the fault screening item in the electric energy change metering data table also includes: Screening the general billing items and the meter reading cycle items in the electric energy change metering data table; When the secondary value of the current in the meter reading cycle item is equal to zero and there is no electricity refund work order in the fault handling list in the general billing item, it is determined that the fault type of the electric energy metering device is a loss of current fault.

7. The fault detection method of the electric energy metering device according to claim 1, characterized in that: Determining the electric energy change metering data table in the electric energy metering data of the current day according to the electric energy metering data table of the current day and the historical electric energy metering data table includes: When the difference between the average value of the electric energy metering data in the current day's electric energy metering data table and the average value of the electric energy metering data in the historical electric energy metering data table is greater than the preset electric quantity value, the electric energy metering data in the current day's electric energy metering data table is determined to be an electric energy change metering data table.

8. The fault detection method of the electric energy metering device according to claim 1, characterized in that: Obtain the historical energy metering data table and the current energy metering data table of the energy metering device, including: The historical electric energy metering data table and the current electric energy metering data table are obtained from a marketing database.

9. The fault detection method of the electric energy metering device according to claim 1, characterized in that: After determining the fault type of the electric energy metering device according to the state of the fault screening item in the electric energy change metering data table, the method further includes: The current day's electric energy metering data table is updated to the historical electric energy metering data table.

10. A fault detection system for an electric energy metering device, characterized in that: include: A data acquisition module, used to acquire the historical electric energy metering data table and the current electric energy metering data table of the electric energy metering device; An electric energy change metering module, used for determining the electric energy change metering data table in the electric energy metering data of the current day according to the electric energy metering data table of the current day and the historical electric energy metering data table; The fault type determination module is used to determine the fault type of the electric energy metering device according to the state of the fault screening item in the electric energy change metering data table.

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