A method and apparatus for detecting current imbalance

Abstract

This application discloses a method and apparatus for detecting current imbalance. The method includes: detecting real-time data from a user's electricity meter, filtering to obtain qualified meter current data, calculating the current imbalance rate of the meter current data based on the real-time current range corresponding to the meter current data, determining the balance state of the meter current data, and issuing an alarm to the user's electricity meter after the unbalanced meter current data persists for a preset time. It is evident that the meter current data is filtered from the real-time data obtained from the meter detection, eliminating the possibility of meter current data where one phase current is excessively high while other phase currents are excessively low, thus reducing the false alarm rate for current imbalance. Furthermore, the calculation of the current imbalance rate is related to the real-time current range corresponding to the meter current data, allowing for analysis in conjunction with electricity consumption behavior within the real-time current range, resulting in a more accurate determination of the balance state of the meter current data and enabling alarms for actual electricity faults or electricity theft.

Description

Technical Field

[0001] This application relates to the field of power data statistical analysis, and more specifically, to a method and apparatus for detecting current imbalance. Background Technology

[0002] With the increasing prevalence of electricity use, residences, businesses, and other locations are equipped with electricity meters to monitor the specific electricity consumption behavior of customers. Under normal circumstances, the production environment, equipment, and efficiency of electricity customers are fixed. Therefore, the three-phase current imbalance data generated within the same time period will fluctuate within a certain range. By studying the regularity of the three-phase current imbalance data, it is possible to determine whether an electricity customer is experiencing power outages or electricity theft.

[0003] Currently, there are ways to determine whether the three-phase current is unbalanced, such as by setting an upper limit threshold for fluctuations to determine the balance. However, in reality, many dedicated transformer users experience situations where one phase current is too high and the currents of other phases are too low during electricity use. What was originally an unbalanced current situation becomes balanced when the power supply bureau staff go to the site for verification. Therefore, it is difficult to accurately determine whether the electricity customer has a power failure or electricity theft. Summary of the Invention

[0004] In view of the above problems, this application is made to provide a method and device for detecting current imbalance, so as to accurately alarm for actual power failures or electricity theft.

[0005] To achieve the above objectives, the following specific solutions are proposed:

[0006] A method for detecting current imbalance, comprising:

[0007] The real-time data of the user's electricity meter is detected and filtered to obtain qualified meter current data;

[0008] Based on the real-time current range corresponding to the meter current data, calculate the current imbalance rate of the meter current data;

[0009] The balance state of the meter current data is determined based on the current imbalance rate of the meter current data.

[0010] If the meter current data remains unbalanced for a preset period of time, an alarm for current imbalance will be issued for the user's meter.

[0011] Optionally, the step of detecting and filtering the real-time data of the user's electricity meter to obtain qualified meter current data includes:

[0012] Detect the real-time current and voltage data of the user's electricity meter;

[0013] When the real-time current data is within a preset current range and the real-time voltage data is within a preset voltage range, the real-time current data is determined to be the first qualified current data. The lower limit and upper limit of the preset current range are 0 and a preset current upper limit threshold, respectively. The lower limit and upper limit of the preset voltage range are 0 and a preset voltage upper limit threshold, respectively.

[0014] When the first qualified current data meets the qualified screening conditions corresponding to the meter type of the user's electricity meter, the first qualified current data is determined to be qualified meter current data.

[0015] Optionally, when the first qualified current data meets the qualified screening conditions corresponding to the user's electricity meter type, the first qualified current data is determined to be qualified meter current data, including:

[0016] When the first qualified current data is collected by a three-phase three-wire meter, if the current of one phase of the A / C phase of the three-phase three-wire meter is greater than the preset first ratio of the starting current, and the current of the other phase of the A / C phase is less than the preset second ratio of the starting current, the first qualified current data is determined to be qualified meter current data.

[0017] When the first qualified current data is collected by a three-phase four-wire meter, if at least one phase current of the three-phase current of the three-phase four-wire meter is greater than the preset third ratio of the starting current, and all three phase currents are less than the preset fourth ratio of the starting current, the first qualified current data is determined to be the second qualified current data.

[0018] When the three-phase voltages of the three-phase four-wire meter are all greater than the preset fifth ratio of the starting voltage, the second qualified current data is determined to be qualified meter current data.

[0019] Optionally, based on the real-time current range of the meter current data, the current imbalance rate of the meter current data is calculated, including:

[0020] Determine the real-time current range in which the meter current data falls;

[0021] Determine the maximum and minimum three-phase currents of the meter current data within the real-time current range;

[0022] Based on the maximum three-phase current and the minimum three-phase current, the current imbalance rate of the meter current data is calculated.

[0023] Optionally, determining the balance state of the meter current data based on the current imbalance rate of the meter current data includes:

[0024] When the real-time current range corresponding to the meter current data has an interval mean and a standard deviation, the difference between the current imbalance rate and the interval mean is determined.

[0025] If the phase difference is greater than a preset multiple of the standard deviation, the balance state of the meter current data is determined to be unbalanced; otherwise, the balance state of the meter current data is determined to be balanced.

[0026] Optionally, determining the balance state of the meter current data based on the current imbalance rate of the meter current data includes:

[0027] When the real-time current range corresponding to the meter current data does not have an interval mean and standard deviation, if the current imbalance rate is greater than a preset balance rate threshold, then the balance state of the meter current data is determined to be an unbalanced state; otherwise, the balance state of the meter current data is determined to be a balanced state.

[0028] Optionally, the process of determining the interval mean and standard deviation for each of the real-time current intervals includes:

[0029] Obtain current data from multiple historical electricity meters;

[0030] Determine the time current interval to which each historical meter current data belongs;

[0031] For each time current interval, if the number of historical meter current data in the time current interval is not less than the preset sample number, then the preset sample number of historical meter current data is selected from each historical meter current data in the time current interval, and the mean and standard deviation of the time current interval are calculated.

[0032] The mean and standard deviation of each real-time current interval are determined as the mean and standard deviation of the time current interval corresponding to that real-time current interval.

[0033] Optionally, the method further includes:

[0034] For each time current interval, if the number of historical meter current data in the time current interval is less than the preset sample size, then the time current interval has no interval mean and standard deviation.

[0035] A current imbalance detection device, comprising:

[0036] The real-time data detection unit is used to detect the real-time data of the user's electricity meter and filter it to obtain qualified meter current data.

[0037] The unbalance rate calculation unit is used to calculate the current unbalance rate of the meter current data based on the real-time current range corresponding to the meter current data.

[0038] The balance state determination unit is used to determine the balance state of the meter current data based on the current imbalance rate of the meter current data.

[0039] The alarm unit is used to issue a current imbalance alarm to the user's electricity meter after the meter's current data remains unbalanced for a preset time.

[0040] Optionally, the real-time data detection unit includes:

[0041] The current and voltage detection unit is used to detect the real-time current and voltage data of the user's electricity meter.

[0042] The first qualified data determination unit is used to determine the real-time current data as the first qualified current data when the real-time current data is within a preset current range and the real-time voltage data is within a preset voltage range. The lower limit and upper limit of the preset current range are 0 and a preset current upper limit threshold, respectively, and the lower limit and upper limit of the preset voltage range are 0 and a preset voltage upper limit threshold, respectively.

[0043] The qualified data determination unit is used to determine the first qualified current data as qualified meter current data when the first qualified current data meets the qualified screening conditions corresponding to the meter type of the user's meter.

[0044] Optionally, the qualified data determination unit includes:

[0045] The first qualified data determination subunit is used to determine the first qualified current data as qualified meter current data when the first qualified current data is collected by a three-phase three-wire meter. If the current of one phase of the A / C phase of the three-phase three-wire meter is greater than a preset first ratio of the starting current, and the current of the other phase of the A / C phase is less than a preset second ratio of the starting current.

[0046] The second qualified data determination subunit is used to determine the first qualified current data as the second qualified current data when the first qualified current data is collected by a three-phase four-wire meter. If at least one phase current of the three-phase current of the three-phase four-wire meter is greater than the preset third ratio of the starting current, and all three phase currents are less than the preset fourth ratio of the starting current.

[0047] The third qualified data determination subunit is used to determine the second qualified current data as qualified meter current data when all three phase voltages of the three-phase four-wire meter are greater than the preset fifth ratio of the starting voltage.

[0048] Optionally, the imbalance rate calculation unit includes:

[0049] A real-time current range determination unit is used to determine the real-time current range in which the meter current data is located;

[0050] The maximum and minimum current determination unit is used to determine the three-phase maximum current and the three-phase minimum current of the meter current data in the real-time current range.

[0051] The imbalance rate determination unit calculates the current imbalance rate of the meter current data based on the maximum three-phase current and the minimum three-phase current.

[0052] Optionally, the equilibrium state determination unit includes:

[0053] The first balance state determination subunit is used to determine the difference between the current imbalance rate and the interval mean when the real-time current interval corresponding to the meter current data has an interval mean and a standard deviation.

[0054] The second balance state determination subunit is used to determine that the balance state of the meter current data is unbalanced if the phase difference value is greater than a preset multiple of the standard deviation, and otherwise determine that the balance state of the meter current data is balanced.

[0055] Optionally, the equilibrium state determination unit includes:

[0056] The third balance state determination subunit is used to determine the balance state of the meter current data as unbalanced if the current imbalance rate is greater than a preset balance rate threshold when there is no interval mean and standard deviation in the real-time current interval corresponding to the meter current data; otherwise, it determines the balance state of the meter current data as balanced.

[0057] Optionally, the device may also include:

[0058] Historical data acquisition unit, used to acquire current data from multiple historical electricity meters;

[0059] The time-current interval determination unit is used to determine the time-current interval to which each historical meter current data belongs;

[0060] The mean and standard deviation calculation unit is used to select the preset number of historical meter current data from each historical meter current data in the time current interval for each time current interval, and calculate the mean and standard deviation of the time current interval if the number of historical meter current data in the time current interval is not less than the preset number of samples.

[0061] The time interval matching unit is used to determine the interval mean and standard deviation of each real-time current interval as the mean and standard deviation of the time current interval corresponding to that real-time current interval.

[0062] Optionally, the device may also include:

[0063] The rejection calculation unit is used to determine whether, for each time current interval, if the number of historical meter current data in the time current interval is less than the preset sample size, then the time current interval does not have an interval mean and standard deviation.

[0064] By employing the above technical solution, this application detects real-time data from user electricity meters, filters out qualified meter current data, calculates the current imbalance rate of the meter current data based on the real-time current range corresponding to the current data, determines the balance state of the meter current data according to the current imbalance rate, and issues a current imbalance alarm to the user electricity meter after the unbalanced meter current data has been in a balanced state for a preset time. Therefore, the meter current data is filtered from the real-time data obtained from meter detection, eliminating the possibility of meter current data with excessively high current in one phase and excessively low current in other phases, thus reducing the false alarm rate for current imbalance. Furthermore, the calculation of the current imbalance rate is related to the real-time current range corresponding to the meter current data, allowing for analysis in conjunction with electricity consumption behavior within the real-time current range, resulting in a more accurate determination of the balance state of the meter current data and thus accurately alarming for actual electricity faults or electricity theft. Attached Figure Description

[0065] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0066] Figure 1 A schematic diagram of a process for detecting current imbalance provided in an embodiment of this application;

[0067] Figure 2 A schematic diagram of a device for detecting current imbalance provided in an embodiment of this application;

[0068] Figure 3 This is a schematic diagram of a device for detecting current imbalance provided in an embodiment of this application. Detailed Implementation

[0069] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0070] The proposed solution can be implemented based on a terminal with data processing capabilities, such as a computer, server, or cloud platform.

[0071] Next, combined Figure 1 The current imbalance detection method of this application may include the following steps:

[0072] Step S110: Detect the real-time data of the user's electricity meter and filter it to obtain qualified meter current data.

[0073] Specifically, the user's electricity meter can be a three-phase three-wire meter or a three-phase four-wire meter.

[0074] Specifically, for real-time data testing of three-phase three-wire meters, qualified meter current data can be obtained by filtering according to the qualified filtering standards for three-phase three-wire meters. Similarly, for real-time data testing of three-phase four-wire meters, qualified meter current data can be obtained by filtering according to the qualified filtering standards for three-phase four-wire meters.

[0075] Step S120: Calculate the current imbalance rate of the meter current data based on the real-time current range corresponding to the meter current data.

[0076] Specifically, the real-time current range can be composed of current level ranges and time periods. The current level ranges can be divided according to the current magnitude, and each time period has an equal duration.

[0077] For example, if the current level range is [0.5, 1], then when the meter current data is 0.8A, it can be said that the current data corresponds to the current level range [0.5, 1]. Other current level ranges can be [1, 1.5], [1.5, 2], [2, 2.5], [2.5, 3], [3, 3.5], [3.5, 4], [4, 4.5], [4.5, 5], and [5, ∞]. Time periods can be divided into 96 time periods with a duration of 15 minutes, based on a 24-hour day.

[0078] It is understandable that electricity meter current data is real-time. The current level range within a certain time period can reflect the power consumption behavior of historical electricity meter current data. By comparing the current meter data with historical current data, the degree of abnormality of the current current data can be determined, thereby analyzing the current imbalance rate of the electricity meter current data.

[0079] Step S130: Determine the balance state of the meter current data based on the current imbalance rate of the meter current data.

[0080] It is understandable that the balance of the meter current data can be measured by the current imbalance rate. For example, when the current imbalance rate is not greater than the set value, it can be determined that the meter current data is in balance.

[0081] Step S140: When the meter current data in the unbalanced state continues for a preset time, an unbalanced current alarm is issued to the user's meter.

[0082] Specifically, the preset time can represent the maximum duration for which the detected real-time meter current data is unbalanced. If the unbalanced meter current data continues for this maximum duration, it can indicate that the electricity customer has a power failure or is suspected of electricity theft, and therefore an alarm can be triggered.

[0083] The current imbalance detection method provided in this embodiment detects real-time data from a user's electricity meter, filters out qualified meter current data, calculates the current imbalance rate based on the real-time current range corresponding to the meter current data, determines the balance state of the meter current data based on the current imbalance rate, and issues a current imbalance alarm to the user's electricity meter after the unbalanced meter current data has been in a balanced state for a preset time. Therefore, the meter current data is filtered from the real-time data obtained from the meter detection, eliminating the possibility of meter current data with excessively high current in one phase and excessively low current in other phases, thus reducing the false alarm rate for current imbalance. Furthermore, the calculation of the current imbalance rate is related to the real-time current range corresponding to the meter current data, allowing for analysis based on electricity consumption behavior within the real-time current range, resulting in a more accurate determination of the balance state of the meter current data and thus accurately alarming for actual electricity faults or electricity theft.

[0084] In some embodiments of this application, the process of detecting and filtering the real-time data of the user's electricity meter to obtain qualified meter current data in step S110 is described. This process may include:

[0085] S1. Detect the real-time current and voltage data of the user's electricity meter.

[0086] It is understandable that the real-time data recorded by a user's electricity meter may include real-time current data and real-time voltage data, so the real-time current data and real-time voltage data of the user's electricity meter can be detected.

[0087] S2. When the real-time current data is within the preset current range and the real-time voltage data is within the preset voltage range, the real-time current data is determined to be the first qualified current data.

[0088] The lower limit and upper limit of the preset current range are 0 and the preset current upper limit threshold, respectively, and the lower limit and upper limit of the preset voltage range are 0 and the preset voltage upper limit threshold, respectively.

[0089] Specifically, the preset current upper limit threshold represents the upper limit of the normal current for a user during electricity use. This preset current upper limit threshold can be customized, such as 60A. Similarly, the preset voltage upper limit threshold represents the upper limit of the normal voltage for a user during electricity use. This preset voltage upper limit threshold can be customized, such as 280V.

[0090] Understandably, if the detected real-time current data is less than 0 or greater than the preset current upper limit threshold, it indicates an anomaly in the recording of that real-time current data, thus eliminating the need for current imbalance analysis on that particular real-time current data. Similarly, if the detected real-time voltage data is less than 0 or greater than the preset voltage upper limit threshold, it indicates an anomaly in the recording of that real-time voltage data, thus eliminating the need for current imbalance analysis on the corresponding real-time current data.

[0091] S3. When the first qualified current data meets the qualified screening conditions corresponding to the user's meter type, the first qualified current data is determined to be qualified meter current data.

[0092] The criteria for determining the validity of current data may differ depending on the type of meter used for user meters. For three-phase three-wire meters, the first valid current data can be determined according to the corresponding criteria for three-phase three-wire meters. Similarly, for three-phase four-wire meters, the first valid current data can be determined according to the corresponding criteria for three-phase four-wire meters.

[0093] Specifically, when the first qualified current data meets the qualification screening criteria corresponding to the user's meter type, the process of determining the first qualified current data as qualified meter current data can include the following two situations:

[0094] The first type, S311, when the first qualified current data is collected by a three-phase three-wire meter, if the current of one phase of the A / C phase of the three-phase three-wire meter is greater than the preset first ratio of the starting current, and the current of the other phase of the A / C phase is less than the preset second ratio of the starting current, the first qualified current data is determined to be qualified meter current data.

[0095] Specifically, the preset first ratio can represent the lower limit ratio of the fluctuation of the starting current of the three-phase three-wire meter. The preset first ratio can be customized, such as 0.5. The preset second ratio can represent the upper limit ratio of the fluctuation of the starting current of the three-phase three-wire meter. The preset second ratio can be customized, such as 2.

[0096] It is understandable that when the current of each phase of the first qualified current data obtained by a three-phase three-wire meter fluctuates between the upper limit and the lower limit of current fluctuation, the first qualified current data can be determined as qualified meter current data.

[0097] The second type, S321, when the first qualified current data is collected by a three-phase four-wire meter, if at least one phase current of the three-phase current of the three-phase four-wire meter is greater than the preset third ratio of the starting current, and all three phase currents are less than the preset fourth ratio of the starting current, the first qualified current data is determined to be the second qualified current data.

[0098] Specifically, the preset third ratio can represent the lower limit ratio of the fluctuation of the starting current of the three-phase four-wire meter. The preset third ratio can be customized, such as 0.5. The preset fourth ratio can represent the upper limit ratio of the fluctuation of the starting current of the three-phase four-wire meter. The preset fourth ratio can be customized, such as 2.

[0099] It is understandable that when the phase currents of the first qualified current data obtained by the three-phase four-wire meter fluctuate between the upper limit and the lower limit of current fluctuation, the first qualified current data can be determined as the second qualified current data.

[0100] S322. When the three-phase voltages of the three-phase four-wire meter are all greater than the preset fifth ratio of the starting voltage, the second qualified current data is determined as the qualified meter current data.

[0101] Specifically, the preset fifth ratio can represent the lower limit of the normal value of the starting voltage of a three-phase four-wire meter. The preset fifth ratio can be customized, such as 0.8.

[0102] It is understandable that when the voltage of each phase of the second qualified current data obtained by the three-phase four-wire meter is above the lower limit of normal voltage, the second qualified current data can be determined as qualified meter current data.

[0103] In some embodiments of this application, the process of calculating the current imbalance rate of the meter current data based on the real-time current range of the meter current data in step S120 above is described. This process may include:

[0104] S1. Determine the real-time current range in which the meter current data is located.

[0105] Specifically, the current level range can be determined based on the three-phase current data of the electricity meter, and the time period can be determined based on the collection time of the electricity meter current data, thereby determining the real-time current range in which the electricity meter current data is located.

[0106] S2. Determine the maximum and minimum three-phase currents of the meter current data within the real-time current range.

[0107] Specifically, the current data of the electricity meter can include three-phase current data. The maximum three-phase current can represent the maximum current data among the three-phase current data, and the minimum three-phase current can represent the minimum current data among the three-phase current data.

[0108] S3. Calculate the current imbalance rate of the meter current data based on the maximum and minimum three-phase currents.

[0109] Specifically, the current imbalance rate of the meter current data can be calculated using the following formula:

[0110]

[0111] Where Imax is the maximum three-phase current and Imin is the minimum three-phase current.

[0112] In some embodiments of this application, the process of determining the balance state of the meter current data based on the current imbalance rate of the meter current data in step S130 is described. This process may include:

[0113] S1. When the real-time current range corresponding to the meter current data has an interval mean and standard deviation, determine the difference between the current imbalance rate and the interval mean.

[0114] Among them, the mean and standard deviation of the real-time current range can represent the mean and standard deviation of historical meter current data over that time period and over the current level range.

[0115] Specifically, the difference between the current imbalance rate and the interval mean can represent the degree of difference between the electricity consumption behavior reflected by the current meter current data and the historical electricity consumption behavior during the same period.

[0116] S2. If the phase difference is greater than a preset multiple of the standard deviation, the balance state of the meter current data is determined to be unbalanced; otherwise, the balance state of the meter current data is determined to be balanced.

[0117] Specifically, the preset multiplier can represent the proportion of electricity consumption behavior that deviates from historical normal behavior. The preset multiplier can be customized, such as 2 or 3.

[0118] Understandably, if the difference between the current electricity meter reading and historical electricity consumption during the same period exceeds three standard deviations, it indicates that the current electricity consumption has significantly deviated from normal historical consumption patterns, and the balance of the meter current data can be determined as unbalanced. Conversely, if the difference between the current electricity meter reading and historical electricity consumption during the same period is within two or three standard deviations, it indicates that the current electricity consumption has not deviated from the normal range of historical electricity consumption, and the balance of the meter current data can be determined as balanced.

[0119] S3. When the real-time current range corresponding to the meter current data does not have an interval mean and standard deviation, if the current imbalance rate is greater than the preset balance rate threshold, the balance state of the meter current data is determined to be unbalanced; otherwise, the balance state of the meter current data is determined to be balanced.

[0120] Specifically, the preset balance rate threshold can represent the maximum proportion of high and low balance among the three-phase currents. The preset balance rate threshold can be customized, such as 98% or 25%.

[0121] Understandably, when the real-time current range corresponding to the meter current data does not have an interval mean and standard deviation, it is impossible to analyze and calculate using the interval mean and standard deviation of the real-time current range. In this case, it can be compared with a preset balance rate threshold. When the meter current data is greater than the preset balance rate threshold, it indicates that there is a current imbalance in the meter current data. When the meter current data is not greater than the preset balance rate threshold, it indicates that the meter current data is in a normal state.

[0122] In some embodiments of this application, the process for determining the mean and standard deviation of the real-time current range mentioned in the above embodiments is described. This process may include:

[0123] S1. Obtain current data from multiple historical electricity meters.

[0124] Specifically, multiple historical meter current data can be obtained from the metering automation system, which can retrieve all meter current data from the past six months.

[0125] S2. Determine the time current interval to which each historical meter current data belongs.

[0126] Understandably, each historical meter current data record includes the collection time and current value. Therefore, the time period can be determined based on the collection time, and the current level range can be determined based on the current value. Finally, the time current range to which the historical meter current data belongs can be determined based on the time period and the current level range.

[0127] S3. For each time current interval, if the number of historical meter current data in the time current interval is not less than the preset sample size, then select the preset sample size of historical meter current data from each historical meter current data in the time current interval, and calculate the mean and standard deviation of the time current interval.

[0128] Specifically, the preset sample size represents the minimum number of samples that are statistically significant when calculating the interval mean and standard deviation of the time-current interval. The preset sample size can be customized, such as 60.

[0129] For example, if there are 100 historical current data points within a certain time interval, the mean and standard deviation for that time interval can be calculated using the following formula:

[0130] E = (K1 + K2 + ... + K) 60 ) / 60

[0131] Where E is the mean value of the current over the time interval, K1~K 60 This refers to 60 historical electricity meter current data points selected from 100 historical electricity meter current data points.

[0132]

[0133] Where σ is the standard deviation over the time-current interval, and k i Let E be the i-th historical meter current data among the 60 selected historical meter current data, and E be the mean value of the current over the time interval.

[0134] In addition, when the number of historical meter current data in a time current interval is less than the preset sample size, such as 50 historical meter current data in a certain time current interval, which is less than the preset sample size of 60, it can be said that the calculation of the interval mean and standard deviation of that time current interval is not statistically significant. Therefore, the mean and standard deviation of that time current interval do not need to be calculated, and there is no interval mean and standard deviation for that time current interval.

[0135] S4. The mean and standard deviation of each real-time current interval are determined as the mean and standard deviation of the time current interval corresponding to that real-time current interval.

[0136] The apparatus for detecting current imbalance provided in the embodiments of this application will be described below. The apparatus for detecting current imbalance described below and the method for detecting current imbalance described above can be referred to in correspondence.

[0137] See Figure 2 , Figure 2 This is a schematic diagram of a device for detecting current imbalance disclosed in an embodiment of this application.

[0138] like Figure 2 As shown, the device may include:

[0139] The real-time data detection unit 11 is used to detect the real-time data of the user's electricity meter and filter it to obtain qualified electricity meter current data.

[0140] The imbalance rate calculation unit 12 is used to calculate the current imbalance rate of the meter current data based on the real-time current range corresponding to the meter current data.

[0141] Balance state determination unit 13 is used to determine the balance state of the meter current data based on the current imbalance rate of the meter current data.

[0142] The alarm unit 14 is used to issue a current imbalance alarm to the user's electricity meter after the meter current data in an unbalanced state has been maintained for a preset time.

[0143] Optionally, the real-time data detection unit includes:

[0144] The current and voltage detection unit is used to detect the real-time current and voltage data of the user's electricity meter.

[0145] The first qualified data determination unit is used to determine the real-time current data as the first qualified current data when the real-time current data is within a preset current range and the real-time voltage data is within a preset voltage range. The lower limit and upper limit of the preset current range are 0 and a preset current upper limit threshold, respectively, and the lower limit and upper limit of the preset voltage range are 0 and a preset voltage upper limit threshold, respectively.

[0146] The qualified data determination unit is used to determine the first qualified current data as qualified meter current data when the first qualified current data meets the qualified screening conditions corresponding to the meter type of the user's meter.

[0147] Optionally, the qualified data determination unit includes:

[0148] The first qualified data determination subunit is used to determine the first qualified current data as qualified meter current data when the first qualified current data is collected by a three-phase three-wire meter. If the current of one phase of the A / C phase of the three-phase three-wire meter is greater than a preset first ratio of the starting current, and the current of the other phase of the A / C phase is less than a preset second ratio of the starting current.

[0149] The second qualified data determination subunit is used to determine the first qualified current data as the second qualified current data when the first qualified current data is collected by a three-phase four-wire meter. If at least one phase current of the three-phase current of the three-phase four-wire meter is greater than the preset third ratio of the starting current, and all three phase currents are less than the preset fourth ratio of the starting current.

[0150] The third qualified data determination subunit is used to determine the second qualified current data as qualified meter current data when all three phase voltages of the three-phase four-wire meter are greater than the preset fifth ratio of the starting voltage.

[0151] Optionally, the imbalance rate calculation unit includes:

[0152] A real-time current range determination unit is used to determine the real-time current range in which the meter current data is located;

[0153] The maximum and minimum current determination unit is used to determine the three-phase maximum current and the three-phase minimum current of the meter current data in the real-time current range.

[0154] The imbalance rate determination unit calculates the current imbalance rate of the meter current data based on the maximum three-phase current and the minimum three-phase current.

[0155] Optionally, the equilibrium state determination unit includes:

[0156] The first balance state determination subunit is used to determine the difference between the current imbalance rate and the interval mean when the real-time current interval corresponding to the meter current data has an interval mean and a standard deviation.

[0157] The second balance state determination subunit is used to determine that the balance state of the meter current data is unbalanced if the phase difference value is greater than a preset multiple of the standard deviation, and otherwise determine that the balance state of the meter current data is balanced.

[0158] Optionally, the equilibrium state determination unit includes:

[0159] The third balance state determination subunit is used to determine the balance state of the meter current data as unbalanced if the current imbalance rate is greater than a preset balance rate threshold when there is no interval mean and standard deviation in the real-time current interval corresponding to the meter current data; otherwise, it determines the balance state of the meter current data as balanced.

[0160] Optionally, the device may also include:

[0161] Historical data acquisition unit, used to acquire current data from multiple historical electricity meters;

[0162] The time-current interval determination unit is used to determine the time-current interval to which each historical meter current data belongs;

[0163] The mean and standard deviation calculation unit is used to select the preset number of historical meter current data from each historical meter current data in the time current interval for each time current interval, and calculate the mean and standard deviation of the time current interval if the number of historical meter current data in the time current interval is not less than the preset number of samples.

[0164] The time interval matching unit is used to determine the interval mean and standard deviation of each real-time current interval as the mean and standard deviation of the time current interval corresponding to that real-time current interval.

[0165] Optionally, the device may also include:

[0166] The rejection calculation unit is used to determine whether, for each time current interval, if the number of historical meter current data in the time current interval is less than the preset sample size, then the time current interval does not have an interval mean and standard deviation.

[0167] The current imbalance detection device provided in this application embodiment can be applied to current imbalance detection equipment, such as terminals: mobile phones, computers, etc. Optionally, Figure 3 The hardware structure block diagram of the current imbalance detection device is shown, with reference to... Figure 3 The hardware structure of a current imbalance detection device may include: at least one processor 1, at least one communication interface 2, at least one memory 3, and at least one communication bus 4.

[0168] In this embodiment of the application, the number of processor 1, communication interface 2, memory 3, and communication bus 4 is at least one, and processor 1, communication interface 2, and memory 3 communicate with each other through communication bus 4;

[0169] Processor 1 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention.

[0170] Memory 3 may include high-speed RAM, and may also include non-volatile memory, such as at least one disk storage device;

[0171] The memory stores a program, which the processor can call. The program is used for:

[0172] The real-time data of the user's electricity meter is detected and filtered to obtain qualified meter current data;

[0173] Based on the real-time current range corresponding to the meter current data, calculate the current imbalance rate of the meter current data;

[0174] The balance state of the meter current data is determined based on the current imbalance rate of the meter current data.

[0175] If the meter current data remains unbalanced for a preset period of time, an alarm for current imbalance will be issued for the user's meter.

[0176] Optionally, the refined and extended functions of the program can be found in the description above.

[0177] This application embodiment also provides a storage medium that can store a program suitable for execution by a processor, the program being used for:

[0178] The real-time data of the user's electricity meter is detected and filtered to obtain qualified meter current data;

[0179] Based on the real-time current range corresponding to the meter current data, calculate the current imbalance rate of the meter current data;

[0180] The balance state of the meter current data is determined based on the current imbalance rate of the meter current data.

[0181] If the meter current data remains unbalanced for a preset period of time, an alarm for current imbalance will be issued for the user's meter.

[0182] Optionally, the refined and extended functions of the program can be found in the description above.

[0183] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0184] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The various embodiments can be combined as needed, and the same or similar parts can be referred to each other.

[0185] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method of detecting current imbalance, characterized by, include: The real-time data of the user's electricity meter is detected and filtered to obtain qualified meter current data; Based on the real-time current range corresponding to the meter current data, calculate the current imbalance rate of the meter current data; The balance state of the meter current data is determined based on the current imbalance rate of the meter current data. If the current data of the meter remains unbalanced for a preset time, an alarm for current imbalance will be issued for the user's meter. Determining the balance state of the meter current data based on the current imbalance rate of the meter current data includes: When the real-time current interval corresponding to the meter current data has an interval mean and standard deviation, the degree of difference between the electricity consumption behavior reflected by the current meter current data and the historical electricity consumption behavior in that period is determined. If the difference is greater than a preset multiple of the standard deviation, the balance state of the meter current data is determined to be unbalanced; otherwise, the balance state of the meter current data is determined to be balanced.

2. The method of claim 1, wherein, The process of detecting and filtering real-time data from user electricity meters to obtain qualified meter current data includes: Detect the real-time current and voltage data of the user's electricity meter; When the real-time current data is within a preset current range and the real-time voltage data is within a preset voltage range, the real-time current data is determined to be the first qualified current data. The lower limit and upper limit of the preset current range are 0 and a preset current upper limit threshold, respectively. The lower limit and upper limit of the preset voltage range are 0 and a preset voltage upper limit threshold, respectively. When the first qualified current data meets the qualified screening conditions corresponding to the meter type of the user's electricity meter, the first qualified current data is determined to be qualified meter current data.

3. The method of claim 2, wherein, When the first qualified current data meets the qualified screening conditions corresponding to the meter type of the user's electricity meter, the first qualified current data is determined to be qualified meter current data, including: When the first qualified current data is collected by a three-phase three-wire meter, if the current of one phase of the A / C phase of the three-phase three-wire meter is greater than the preset first ratio of the starting current, and the current of the other phase of the A / C phase is less than the preset second ratio of the starting current, the first qualified current data is determined to be qualified meter current data. When the first qualified current data is collected by a three-phase four-wire meter, if at least one phase current of the three-phase current of the three-phase four-wire meter is greater than the preset third ratio of the starting current, and all three phase currents are less than the preset fourth ratio of the starting current, the first qualified current data is determined to be the second qualified current data. When the three-phase voltages of the three-phase four-wire meter are all greater than the preset fifth ratio of the starting voltage, the second qualified current data is determined to be qualified meter current data.

4. The method of claim 1, wherein, Based on the real-time current range of the meter current data, the current imbalance rate of the meter current data is calculated, including: Determine the real-time current range in which the meter current data falls; Determine the maximum and minimum three-phase currents of the meter current data within the real-time current range; Based on the maximum three-phase current and the minimum three-phase current, the current imbalance rate of the meter current data is calculated.

5. The method of claim 1, wherein, Determining the balance state of the meter current data based on the current imbalance rate of the meter current data includes: When the real-time current range corresponding to the meter current data does not have an interval mean and standard deviation, if the current imbalance rate is greater than a preset balance rate threshold, the balance state of the meter current data is determined to be unbalanced; otherwise, the balance state of the meter current data is determined to be balanced.

6. The method of claim 5, wherein, The process of determining the interval mean and standard deviation of each of the aforementioned real-time current intervals includes: Obtain current data from multiple historical electricity meters; Determine the time current interval to which each historical meter current data belongs; For each time current interval, if the number of historical meter current data in the time current interval is not less than the preset sample number, then the preset sample number of historical meter current data is selected from each historical meter current data in the time current interval, and the mean and standard deviation of the time current interval are calculated. The mean and standard deviation of each real-time current interval are determined as the mean and standard deviation of the time current interval corresponding to that real-time current interval.

7. The method of claim 6, wherein, Also includes: For each time current interval, if the number of historical meter current data in the time current interval is less than the preset sample size, then the time current interval has no interval mean and standard deviation.

8. A device for detecting current imbalance, characterized by The device, applied to the current imbalance detection method as described in claim 1, comprises: The real-time data detection unit is used to detect the real-time data of the user's electricity meter and filter it to obtain qualified meter current data. The unbalance rate calculation unit is used to calculate the current unbalance rate of the meter current data based on the real-time current range corresponding to the meter current data. The balance state determination unit is used to determine the balance state of the meter current data based on the current imbalance rate of the meter current data. The alarm unit is used to issue a current imbalance alarm to the user's electricity meter after the meter's current data remains unbalanced for a preset time.

9. The apparatus of claim 8, wherein, The real-time data detection unit includes: The current and voltage detection unit is used to detect the real-time current and voltage data of the user's electricity meter. The first qualified data determination unit is used to determine the real-time current data as the first qualified current data when the real-time current data is within a preset current range and the real-time voltage data is within a preset voltage range. The lower limit and upper limit of the preset current range are 0 and a preset current upper limit threshold, respectively, and the lower limit and upper limit of the preset voltage range are 0 and a preset voltage upper limit threshold, respectively. The qualified data determination unit is used to determine the first qualified current data as qualified meter current data when the first qualified current data meets the qualified screening conditions corresponding to the meter type of the user's meter.

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