A system and method for improving the reliability of operation of a backup battery of an electric energy meter

Abstract

The application provides a system and method for improving the operation reliability of backup batteries of electric energy meters, and relates to the technical field of smart electric energy meters.The system comprises a periodic acquisition unit for acquiring a verification interval period for power supply verification; a switching control unit for controlling the switching of power supply modules and backup batteries to supply power to the electric energy meter based on the verification interval period to acquire first metering data and second metering data; a comparison and analysis unit for performing backup battery metering fault analysis based on the first metering data and the second metering data to obtain fault analysis results; and a calibration unit for calibrating the backup battery power supply metering based on the fault analysis results to improve the operation reliability of the backup batteries of the electric energy meter.The system and method provided by the application can effectively improve the metering accuracy of the backup batteries of the electric energy meter during power supply, thereby improving the operation reliability of the backup batteries of the electric energy meter during emergency power supply.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of smart electric energy meter, in particular to a system and method for improving the operation reliability of backup battery of electric energy meter. BACKGROUND

[0002] When the electric energy meter is powered, the external input alternating current or other forms of electric energy are converted into stable low-voltage direct current required by the internal circuit of the electric energy meter through the power module, thereby providing continuous and stable working voltage for each functional module (such as CPU, metering chip, communication module, display unit) of the electric energy meter. When the external main power supply (such as power grid power supply) of the electric energy meter is interrupted, the backup battery is used as an emergency power supply to provide temporary power for the key functional modules (such as clock chip, storage chip, communication module) of the electric energy meter, so as to ensure that the electric energy meter continues to maintain basic operation functions, such as maintaining time stamp, saving cumulative power data, supporting remote wake-up or meter reading, etc.

[0003] In the prior art, when a sudden event causes the external main power supply of the electric energy meter to be interrupted, and the backup battery is used as an emergency power supply for the key functional modules of the electric energy meter, if the backup battery has a fault and is not timely checked, the backup battery will cause the metering data to be inaccurate when the electric energy meter is powered, thereby affecting the operation reliability of the backup battery of the electric energy meter. SUMMARY

[0004] The present application provides a system and method for improving the operation reliability of the backup battery of the electric energy meter, to solve the technical problem that when a sudden event causes the external main power supply of the electric energy meter to be interrupted, and the backup battery is used as an emergency power supply for the key functional modules of the electric energy meter, if the backup battery has a fault and is not timely checked, the backup battery will cause the metering data to be inaccurate when the electric energy meter is powered.

[0005] To achieve the above-mentioned purpose and other related purposes, the present application provides a system for improving the operation reliability of the backup battery of the electric energy meter, comprising: a periodic acquisition unit configured to acquire a verification interval period for power supply verification; a switching control unit configured to control the switching of the power module and the backup battery to supply power to the electric energy meter based on the verification interval period, so as to obtain first metering data and second metering data, the first metering data being obtained by the power module, and the second metering data being obtained by the backup battery; a comparison and analysis unit configured to perform backup battery metering fault analysis based on the first metering data and the second metering data, and obtain a fault analysis result; and a calibration unit configured to calibrate the backup battery power supply metering based on the fault analysis result, so as to improve the operation reliability of the backup battery of the electric energy meter.

[0006] In an embodiment of the present application, the period acquisition unit comprises: a working condition acquisition subunit, configured to acquire running working condition data of the electric energy meter, the running working condition data comprising power parameters and running environment parameters; a parameter scoring subunit, configured to score the power parameters and the running environment parameters to obtain a first emergency degree score corresponding to the power parameters and a second emergency degree score corresponding to the running environment parameters; a score fusion subunit, configured to perform score fusion on the first emergency degree score and the second emergency degree score to obtain a period adjustment amount, the period adjustment amount comprising an increase adjustment amount and a reduction adjustment amount; and a dynamic adjustment subunit, configured to perform dynamic adjustment on the verification interval period according to the period adjustment amount to obtain a verification interval period for power supply verification; the calculation formula of the verification interval period is: wherein, represents the first emergency degree score, represents a first weight corresponding to the first emergency degree score, represents the second emergency degree score, represents a second weight corresponding to the second emergency degree score, represents an initial value of the verification interval period, represents a reduction adjustment coefficient, represents an increase adjustment coefficient, represents a lower limit score, represents an upper limit score.

[0007] In an embodiment of the present application, the parameter scoring subunit comprises: a first difference calculation module, configured to perform difference calculation on the power parameters and a base parameter to obtain a running burden amount of the current electric energy meter; a first score calculation module, configured to obtain the first emergency degree score according to the running burden amount and a first emergency degree coefficient; the calculation formula of the first emergency degree score is: wherein, represents the power parameters, represents the base parameter, represents the running burden amount, represents a running burden length, represents a number of running burden lengths constituting the running burden amount, represents a first emergency degree coefficient corresponding to the running burden length; a parameter detection module, configured to detect the running environment parameters and extract target running environment parameters greater than a corresponding set threshold value in the running environment parameters; a second difference calculation module, configured to perform difference calculation on the target running environment parameters and the corresponding set threshold value to obtain an environment burden amount corresponding to each target running environment parameter; a second score calculation module, configured to obtain the second emergency degree score according to the environment burden amount corresponding to all target running environment parameters and a second emergency degree coefficient; the calculation formula of the second emergency degree score is: wherein, representing a target operating environment parameter, representing a set threshold value, representing an environmental burden amount, representing an environmental burden length, representing a number of environmental burden lengths corresponding to the environmental burden amount, representing a first environmental burden length corresponding to the first threshold value. representing a second emergency degree coefficient corresponding to the second threshold value.

[0008] In an embodiment of the present application, the switching control unit comprises: a first acquisition subunit, configured to acquire first metering data of the electric energy meter in the power supply module power supply mode corresponding to each first data upload time before the end of each verification interval period; a second acquisition subunit, configured to receive an end signal of each verification interval period, control the switching of the power supply mode of the electric energy meter from the power supply module power supply mode to the backup battery power supply mode, and acquire intermediate metering data according to the power supply switching time and the data upload time in the backup battery power supply mode; and a prediction subunit, configured to perform numerical compensation on the intermediate metering data based on the power supply switching time and the data upload time to obtain second metering data.

[0009] In an embodiment of the present application, the prediction subunit comprises: a linear calculation module, configured to obtain a metering change rate before the end of the corresponding verification interval period according to the first metering data and the corresponding first data upload time; an actual change calculation module, configured to obtain an actual change rate according to the first metering data, the intermediate metering data, and the acquisition time difference between the first metering data and the intermediate metering data, the acquisition time difference being the sum of the power supply switching time and the data upload time, and the calculation formula of the actual change rate being: , representing the first metering data, representing the intermediate metering data, representing the acquisition time difference; an incremental change calculation module, configured to obtain an incremental change amount corresponding to a unit time according to the difference between the metering change rate and the actual change rate, and the acquisition time difference, and the calculation formula of the incremental change amount being: , representing the metering change rate, representing the actual change rate; a metering accumulation module, configured to obtain a predicted metering accumulation value according to the incremental change amount and the power supply switching time; and an optimization calculation module, configured to perform optimization adjustment on the intermediate metering data according to the predicted metering accumulation value to obtain the second metering data, and the calculation formula of the second metering data being: , representing the power supply switching time, representing the predicted metering accumulation value.

[0010] In an embodiment of the present application, the comparison and analysis unit comprises: a trend analysis subunit configured to obtain a first change trend of the first metering data with respect to the first metering time based on the first metering data and the corresponding first metering time; a prediction subunit configured to predict a speculative metering data corresponding to the second metering data within the second metering time based on the first change trend; a comparison subunit configured to compare the second metering data with the speculative metering data to obtain difference value data between the second metering data and the speculative metering data; a first output subunit configured to, when the difference value data is greater than a difference threshold value, extract all the difference value data to obtain a difference value change curve, find a backup battery power supply fault model corresponding to the difference value change curve based on the difference value change curve, and add the backup battery power supply fault model to the backup battery power supply model constructed to perform backup battery metering fault analysis to obtain a fault analysis result; and a second output subunit configured to, when the difference value data is less than the difference threshold value, continue to perform the steps of controlling the switching power supply module and the backup battery to supply power to the electric energy meter based on the verification interval period to obtain the first metering data and the second metering data.

[0011] In an embodiment of the present application, the first output subunit extracts all the difference value data to obtain the difference value change curve, and in the process of finding the backup battery power supply fault model corresponding to the difference value change curve based on the difference value change curve, further comprises: a curve drawing module configured to obtain a difference value change curve of the difference value data with respect to the second metering time based on all the difference value data and the corresponding second metering time; a calling module configured to call all the fault value change curves in the backup battery power supply fault model library; and a curve comparison module configured to compare the fault value change curves with the difference value change curve in sequence to find a backup battery power supply fault model reaching a specified similarity with the difference value change curve as the backup battery power supply fault model corresponding to the difference value change curve.

[0012] In an embodiment of the present application, the first output subunit adds the backup battery power supply fault model to the constructed backup battery power supply model to perform backup battery metering fault analysis, and obtains the fault analysis result, and the process further comprises: a model construction module, configured to construct a backup battery power supply model according to the backup battery power supply to the electric energy meter in a normal power supply state; a model updating module, configured to add the backup battery power supply fault model to the constructed backup battery power supply model to obtain an updated power supply model; a metering simulation module, configured to output the estimated metering data through the updated power supply model to obtain simulated metering data; a metering comparison module, configured to compare the second metering data with the simulated metering data in similarity to obtain a similarity value; and a result output module, configured to extract all backup battery power supply fault models with a similarity value greater than a similarity threshold value, construct a power supply fault model set, and take the backup battery power supply fault model corresponding to the maximum similarity value in the power supply fault model set as the fault analysis result.

[0013] In an embodiment of the present application, the calibration unit comprises: a lookup subunit, configured to look up corresponding metering data calibration data according to the backup battery power supply fault model corresponding to the fault analysis result; and an adjustment and calibration subunit, configured to sequentially perform corresponding adjustment and calibration on the second metering data when the backup battery supplies power to the electric energy meter through the metering data calibration data, to obtain calibrated metering data, so as to improve the operation reliability of the backup battery of the electric energy meter.

[0014] To achieve the above object and other related objects, the present application further provides a method for improving the operation reliability of the backup battery of an electric energy meter, comprising: obtaining a verification interval period for power supply verification through a periodic acquisition unit; controlling the switching power module and the backup battery to supply power to the electric energy meter based on the verification interval period through a switching control unit, to obtain first metering data and second metering data, wherein the first metering data is obtained by power supply module power supply, and the second metering data is obtained by backup battery power supply; performing backup battery metering fault analysis based on the first metering data and the second metering data through a comparison and analysis unit, to obtain a fault analysis result; and performing backup battery power supply metering calibration based on the fault analysis result through a calibration unit, to improve the operation reliability of the backup battery of the electric energy meter.

[0015] The beneficial effects of the present application: the system and method for improving the operation reliability of the backup battery of the electric energy meter provided by the present application can dynamically adjust the verification interval period of the backup battery power supply calibration verification by using the real-time changes of the current power supply condition, thereby ensuring the timing control of the power supply mode switching at the end of each verification interval period, thereby improving the timeliness of the backup battery power supply calibration. And when switching the power supply mode, the first metering data uploaded when the power supply module is powered by the external main power supply and the second metering data uploaded by the backup battery power supply can be obtained respectively. After obtaining the first metering data and the second metering data, the backup battery metering fault analysis can be further performed by comparing the first metering data and the second metering data, thereby determining the fault existing when the backup battery metering is used compared with the power supply module power supply. Then, based on the fault analysis result, the calibration scheme can be determined to calibrate the metering data generated by the backup battery power supply, thereby improving the metering accuracy of the backup battery power supply of the electric energy meter, and further improving the operation reliability of the backup battery emergency power supply of the electric energy meter. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and serve to explain the principles of the present application. It is apparent that the accompanying drawings in the following description are only some embodiments of the present application, and other drawings can be obtained from these drawings without creative labor for those skilled in the art.

[0017] In the drawings:

[0018] Figure 1 The structure block diagram of the system for improving the operation reliability of the backup battery of the electric energy meter provided by the embodiment of the present application is shown.

[0019] Figure 2 The flowchart of the method for improving the operation reliability of the backup battery of the electric energy meter provided by the embodiment of the present application is shown.

[0020] The reference signs are as follows:

[0021] Period acquisition unit 111; switching control unit 112; comparison and analysis unit 113; calibration unit 114. DETAILED DESCRIPTION

[0022] Following make the specific concrete example explanation the embodiment of the present application, the person skilled in the art can be easily understood the other advantages and efficacy of the present application from the disclosure of this specification. The present application can also be implemented or applied by another different specific embodiment, the details in this specification can also be based on different views and applications, various modifications or changes are carried out without departing from the spirit of the present application, in the case of no conflict, the following examples and the features in the embodiment can be combined with each other.

[0023] It should be noted that the drawings provided in the following examples only illustrate the basic concept of the present application in a schematic manner, and the components related to the present application are shown in the drawings, but not drawn according to the number, shape and size of the components when actually implemented. The actual implementation of each component may be a random change in type, number and proportion, and the component layout pattern may be more complex.

[0024] In the following description, a large number of details are discussed to provide a more thorough explanation of the embodiments of the application, however, it is obvious to those skilled in the art that the embodiments of the application can be implemented without these specific details, and in other embodiments, the known structures and devices are shown in the form of block diagrams rather than in detail, to avoid making the embodiments of the application difficult to understand.

[0025] Please refer to Figure 1 The present application provides a system for improving the reliability of backup battery operation of an electric energy meter, comprising: a periodic acquisition unit 111 for acquiring a verification interval period for power supply verification; a switching control unit 112 for controlling the switching of power supply modules and backup batteries to supply power to the electric energy meter based on the verification interval period, to obtain first metering data and second metering data, the first metering data being obtained by power supply module power supply, and the second metering data being obtained by backup battery power supply; a comparison and analysis unit 113 for performing backup battery metering fault analysis based on the first metering data and the second metering data, to obtain a fault analysis result; and a calibration unit 114 for calibrating the backup battery power supply metering based on the fault analysis result, to improve the reliability of the backup battery operation of the electric energy meter.

[0026] It can be found from the above that in the case of interruption of external main power supply (for example, grid power supply) of the electric energy meter, before the temporary power supply of the key function modules of the electric energy meter by the backup battery, in order to improve the operation reliability of the backup battery, the verification interval period of the backup battery power supply calibration can be dynamically adjusted by the periodic acquisition unit 111 according to the current power supply condition, so that the timing of switching the power supply mode by the switching control unit 112 can be controlled at the end of each verification interval period, thereby improving the timeliness of the backup battery power supply calibration. When the power supply mode is switched by the switching control unit 112, the first metering data uploaded when the power supply module is powered by the external main power supply and the second metering data uploaded by the backup battery power supply can be acquired respectively. After obtaining the first metering data and the second metering data, the comparison and analysis unit 113 can further compare the first metering data and the second metering data to analyze the backup battery metering fault, so as to determine the fault existing when the backup battery metering is used compared with the power supply module power supply. Then, the calibration unit 114 can determine the calibration scheme based on the fault analysis result to calibrate the metering data generated by the backup battery power supply, thereby improving the metering accuracy of the electric energy meter when the backup battery power supply is used, and further improving the operation reliability of the electric energy meter when the backup battery emergency power supply is used.

[0027] In the system for improving the operation reliability of the backup battery of the electric energy meter, the periodic acquisition unit 111 comprises: a working condition acquisition subunit configured to acquire running working condition data of the electric energy meter, the running working condition data comprising power parameters and running environment parameters; a parameter scoring subunit configured to score the power parameters and the running environment parameters to obtain a first emergency degree score corresponding to the power parameters and a second emergency degree score corresponding to the running environment parameters; a score fusion subunit configured to fuse the first emergency degree score and the second emergency degree score to obtain a periodic adjustment amount, the periodic adjustment amount comprising an increase adjustment amount and a reduction adjustment amount; and a dynamic adjustment subunit configured to dynamically adjust the verification interval period according to the periodic adjustment amount to obtain a verification interval period for power supply verification.

[0028] In the verification interval period of the backup battery, the power consumption of the electric energy meter and other power parameters may cause power interruption, and the backup battery is used for emergency power supply. Of course, the running environment parameters such as temperature, humidity, and thunderstorm weather may also cause power interruption, and the backup battery is needed for emergency power supply. Therefore, the operating condition data of the electric energy meter can be collected by the working condition acquisition subunit, and the collected power parameters and operating environment parameters can be scored by the parameter scoring subunit to obtain the first emergency degree score corresponding to the power parameters and the second emergency degree score corresponding to the operating environment parameters. Then, the two scores are fused to comprehensively determine the influence value of the operating condition on the verification interval period, that is, the period adjustment amount. Finally, the verification interval period is dynamically increased or decreased by the dynamic adjustment subunit based on the period adjustment amount, so that the verification interval period can be reasonably controlled based on the operating condition of the electric energy meter, the timing of the backup battery power supply calibration is ensured, the timeliness of the backup battery power supply calibration is improved, and the reliability of the measurement data generated by the backup battery emergency power supply is improved.

[0029] Specifically, the calculation formula of the verification interval period can be:

[0030] ,

[0031] Among them, represents the first emergency degree score, represents the first weight corresponding to the first emergency degree score, represents the second emergency degree score, represents the second weight corresponding to the second emergency degree score, represents the initial value of the verification interval period, represents the reduction adjustment coefficient, represents the increase adjustment coefficient, represents the lower limit score, represents the upper limit score.

[0032] The first emergency degree score , the first weight corresponding to the first emergency degree score , the second emergency degree score , and the second weight corresponding to the second emergency degree score are used to calculate the fusion score , and then the relationship between the fusion score , the lower limit score , and the upper limit score is evaluated. When , it is determined that the initial value of the verification interval period is large and needs to be reduced, and then the reduction adjustment coefficient is used to obtain the verification interval period Likewise, when , it can be determined that the verification interval period initial value is small, and the increasing adjustment needs to be made, and then the increasing adjustment coefficient is used to obtain the verification interval period . Among them, the first emergency score corresponds to the first weight , the second emergency score corresponds to the second weight , the verification interval period initial value , the reduction adjustment coefficient , and the increasing adjustment coefficient are obtained by manual calibration. The lower limit score and the upper limit score are also manually calibrated in advance.

[0033] Further, the parameter score sub-unit includes: a first difference calculation module for calculating the difference between the power parameter and the base parameter to obtain the running burden of the current electric energy meter; a first score calculation module for obtaining the first emergency score according to the running burden and the first emergency coefficient. A parameter detection module is used to detect the running environment parameter, and extract the target running environment parameter greater than the corresponding set threshold value; a second difference calculation module is used to calculate the difference between the target running environment parameter and the corresponding set threshold value to obtain the environmental burden corresponding to each target running environment parameter; and a second score calculation module is used to obtain the second emergency score according to the environmental burden corresponding to all target running environment parameters and the second emergency coefficient.

[0034] In the process of evaluating urgency scores using power parameters and operating environment parameters, the parameter evaluation subunit can first calculate the operating burden of the power parameters based on manually set baseline parameters using the first difference calculation module. That is, when the power parameters exceed the baseline parameters, a corresponding operating burden is created. Therefore, the operating burden of the current electricity meter can be calculated by calculating the difference between the power parameters and the baseline parameters. Then, based on the first urgency coefficient corresponding to the operating burden, the corresponding first urgency score can be calculated. The operating burden corresponds to each type of power parameter; therefore, each operating burden can correspond to a different first urgency coefficient. Based on all operating burdens and their corresponding first urgency coefficients, the first urgency score for all power parameters can be comprehensively derived. Similarly, when evaluating the operating environment parameters, the parameter detection module can first detect the operating environment parameters to extract target operating environment parameters that exceed the corresponding set threshold. Then, the second difference calculation module calculates the difference between the target operating environment parameters and the corresponding set thresholds, thereby calculating the environmental burden corresponding to each target operating environment parameter. Then, using the environmental burden and the second urgency coefficient corresponding to each environmental burden, the second urgency score corresponding to all operating environment parameters is obtained.

[0035] The formula for calculating the first urgency score is:

[0036] ,

[0037] in, Indicates electrical parameters, Indicates the base parameter. Indicates the workload. Indicates the length of the running load. This indicates the number of operating load lengths that make up the operating load. Indicates the first The first urgency coefficient corresponding to each running load length. This base parameter. A conservative value set manually. Operating load length. It is also manually calibrated, and as the number of operating load lengths corresponding to the constituent operating loads increases, its corresponding first urgency coefficient increases. The values ​​are also different, and each value is manually calibrated, i.e., the length of each running load segment. The corresponding first urgency coefficient This will result in certain changes. By calculating the first urgency score in segments, the accuracy of the score corresponding to the power parameters can be effectively improved.

[0038] The formula for calculating the second urgency score is:

[0039] ,

[0040] wherein, the target operating environment parameter, the set threshold value, the environmental burden amount, the environmental burden length, the number of environmental burden lengths corresponding to the environmental burden amount, the second urgency coefficient corresponding to the nth environmental burden length. The target operating environment parameter may be, for example, an environmental temperature value, an environmental humidity value, a thunderstorm degree value, etc. Similarly, the set threshold value is a conservative value set by a human. The environmental burden length is also calibrated by a human, and as the number of environmental burden lengths corresponding to the environmental burden amount increases, the value of the second urgency coefficient corresponding thereto is also not the same, each value being well-calibrated by a human, that is, the second urgency coefficient corresponding to each environmental burden length will change, and by calculating the second urgency score in segments, the accuracy of the score corresponding to the operating environment parameter can be effectively improved. It is worth noting that for the case of reduction adjustment, it can be the case when all operating environment parameters are less than the set threshold value, that is, the corresponding second urgency score

[0041] is not counted, and the second urgency score can be directly set by a human to a unified preset score, and the first urgency score obtained by dynamic calculation and the first weight corresponding to the first urgency score are used for calculation and evaluation.

[0042] In the system for improving the reliability of the backup battery of the electric energy meter according to the present application, the switching control unit 112 comprises: a first acquisition subunit, configured to acquire first metering data of the electric energy meter in the power supply module power supply mode before the end of each verification interval period; a second acquisition subunit, configured to receive an end signal of each verification interval period, control the switching of the power supply mode of the electric energy meter from the power supply module power supply mode to the backup battery power supply mode, and acquire intermediate metering data according to the power supply switching time and the data upload time in the backup battery power supply mode; and a prediction subunit, configured to perform numerical compensation on the intermediate metering data based on the power supply switching time and the data upload time, and obtain second metering data.

[0043] ​In the process of obtaining metering data by switching the power supply mode by the switching control unit 112, the first obtaining subunit obtains the corresponding first metering data before the end of each verification interval period by using the power supply module to supply power. Then, in the metering data collection period after the end of the verification interval period, the second obtaining subunit obtains the end signal of each verification interval period, and controls the power supply mode of the electric energy meter to switch from the power supply module power supply mode to the backup battery power supply mode based on the end signal. And in the process of backup battery power supply, the intermediate metering data generated by the electric energy meter is obtained accordingly. Since there will be a relatively short time of data un-metering during the mode switching process, the prediction subunit can perform numerical compensation on the intermediate metering data based on the power supply switching time and the data upload time, so as to calculate the second metering data, so as to ensure the output accuracy of the second metering data, improve the accuracy of the backup battery fault analysis of the electric energy meter, and ensure the calibration accuracy of the operation reliability of the backup battery of the electric energy meter.

[0044] The prediction subunit can further include: a linear calculation module configured to obtain a metering change rate before the end of the corresponding verification interval period according to the first metering data and the corresponding first data upload time; an actual change calculation module configured to obtain an actual change rate according to the first metering data, the intermediate metering data, and a time difference between the first metering data and the intermediate metering data, the time difference being the sum of the power supply switching time and the data upload time, and the calculation formula of the actual change rate being: , wherein the first metering data is represented by K1, the intermediate metering data is represented by K2, the time difference is represented by T1; an incremental change calculation module configured to obtain an incremental change amount corresponding to a unit time according to the difference between the metering change rate and the actual change rate, and the time difference, and the calculation formula of the incremental change amount being: , wherein the metering change rate is represented by K1, the actual change rate is represented by K2; a metering accumulation module configured to obtain a predicted metering accumulation value according to the incremental change amount and the power supply switching time; and an optimization calculation module configured to optimize and adjust the intermediate metering data according to the predicted metering accumulation value to obtain the second metering data, and the calculation formula of the second metering data being: , wherein the power supply switching time is represented by T1, the predicted metering accumulation value is represented by K2.

[0045] In the process of compensating for the second measurement data using the prediction subunit, the linear calculation module first uses the change of the first measurement data with its corresponding first data upload time to obtain the measurement change rate before the end of the corresponding verification interval period. For example, the least squares method can be used to calculate the measurement change rate of the first measurement data at the end of the verification interval period with its corresponding first data upload time. Further, the actual change calculation module can calculate the actual change rate of the first measurement data within the corresponding time period of the acquisition time difference, based on the first measurement data, intermediate measurement data, and the acquisition time difference between the first measurement data and the intermediate measurement data, by back-calculating from the intermediate measurement data. That is, it can be calculated using the formula... The corresponding actual rate of change is calculated. Then, the incremental change calculation module measures the difference between the rate of change and the actual rate of change, and obtains the time difference, using the formula... The incremental change per unit time is calculated. By combining this incremental change with the time difference and the measured rate of change, the relationship between the measured rate of change and the actual rate of change can be obtained. Furthermore, the metering accumulation module can utilize the incremental change and the power supply switching time. To obtain the predicted cumulative measurement value, that is .in, This represents the first cumulative value obtained based on the rate of change in metering and the corresponding power supply switching time. This indicates the cumulative amount that increases with the power supply switching time during the incremental change. Then, and By superimposing the data, the power supply switching time can be obtained. The corresponding predicted cumulative measurement value. Then, by optimizing the calculation module and combining the intermediate measurement data, the intermediate measurement data can be further adjusted into the second measurement data. The formula can be expressed as follows: .

[0046] In the system for improving the operation reliability of backup batteries of electric energy meters according to the application, the comparison and analysis unit 113 comprises: a trend analysis subunit, configured to obtain a first change trend of the first metering data with respect to the first metering time according to the first metering data and the corresponding first metering time; a prediction subunit, configured to predict the estimated metering data corresponding to the second metering data within the second metering time based on the first change trend; a comparison subunit, configured to compare the second metering data with the estimated metering data to obtain difference value data between the second metering data and the estimated metering data; a first output subunit, configured to extract all the difference value data to obtain a difference value change curve when the difference value data is greater than a difference threshold value, find a backup battery power failure model corresponding to the difference value change curve based on the difference value change curve, and add the backup battery power failure model to the backup battery power supply model constructed to perform backup battery metering failure analysis to obtain a failure analysis result; and a second output subunit, configured to continue the steps of controlling the switching power supply module and the backup battery to supply power to the electric energy meter based on the verification interval period to obtain the first metering data and the second metering data when the difference value data is less than the difference threshold value.

[0047] In the metering failure analysis process of the comparison and analysis unit during backup battery power supply, the corresponding first change trend can be obtained by the trend analysis subunit based on the change of the first metering data with respect to the corresponding first metering time. Then, the estimated metering data corresponding to the second metering data within the second metering time can be predicted by the prediction subunit using the first change trend, so that the comparison subunit can compare the estimated metering data predicted with the second metering data to sequentially calculate the difference value data between the second metering data and the estimated metering data corresponding to each time within the second metering time. Subsequently, the first output subunit can determine that there is a failure in the power supply of the backup battery to the electric energy meter when the difference value data is greater than the difference threshold value, so that the difference value change curve can be constructed by all the difference value data and the corresponding time, and the backup battery power failure model corresponding to the difference value change curve can be further found and added to the backup battery power supply model constructed to generate an updated power supply model that can simulate the backup battery power failure and generate the metering data during the corresponding failure operation, so that the electric energy meter power supply under the corresponding failure state can be simulated based on the updated power supply model, and the backup battery power supply model that best reflects the failure problem of the second metering data can be determined as the failure analysis result, so that the backup battery power metering calibration can be better implemented based on the failure analysis result to improve the operation reliability of the backup batteries of electric energy meters.

[0048] In the process of the first output subunit finding the backup battery power supply fault model corresponding to the difference value change curve, the process can further include: a curve drawing module, configured to obtain the difference value change curve of the difference value data changing with the second measurement time according to all the difference value data and the corresponding second measurement time; a calling module, configured to call all the fault value change curves in the backup battery power supply fault model library; and a curve comparison module, configured to compare the fault value change curves with the difference value change curve in sequence to find the backup battery power supply fault model reaching a specified similarity with the difference value change curve as the backup battery power supply fault model corresponding to the difference value change curve.

[0049] In the process of the first output subunit finding the backup battery power supply fault model corresponding to the difference value change curve, the process can further include: a curve drawing module, configured to obtain the difference value change curve of the difference value data changing with the second measurement time according to all the difference value data and the corresponding second measurement time; a calling module, configured to call all the fault value change curves in the backup battery power supply fault model library; and a curve comparison module, configured to compare the fault value change curves with the difference value change curve in sequence to find the backup battery power supply fault model reaching a specified similarity with the difference value change curve as the backup battery power supply fault model corresponding to the difference value change curve.

[0050] In addition, the first output subunit adds the backup battery power supply fault model to the constructed backup battery power supply model to perform backup battery metering fault analysis, and obtains the fault analysis result. The process can further include: a model construction module, configured to construct a backup battery power supply model according to backup battery power supply to the electric energy meter in a normal power supply state; a model update module, configured to add the backup battery power supply fault model to the constructed backup battery power supply model to obtain an updated power supply model; a metering simulation module, configured to output the estimated metering data through the updated power supply model to obtain simulated metering data; a metering comparison module, configured to compare the second metering data with the simulated metering data to obtain a similarity value; and a result output module, configured to extract all backup battery power supply fault models with a similarity value greater than a similarity threshold value, construct a power supply fault model set, and take the backup battery power supply fault model corresponding to the maximum similarity value in the power supply fault model set as the fault analysis result.

[0051] After the first output subunit queries all possible backup battery power supply fault models, the process of obtaining the fault analysis result can include the model construction module pre-construction of the backup battery and its corresponding electric energy meter in a normal state backup battery power supply model. Then, each possible backup battery power supply fault model is added to the backup battery power supply model through the model update module to reassemble the updated power supply model based on the corresponding backup battery power supply fault, and the estimated metering data is input into the updated power supply model through the metering simulation module to be re-output to obtain the simulated metering data based on the backup battery power supply fault. The result output module compares the second metering data with the simulated metering data corresponding to each backup battery power supply fault to obtain the similarity value corresponding to each backup battery power supply fault. Finally, the result output module outputs all backup battery power supply fault models with a similarity value greater than a similarity threshold value to construct a power supply fault model set. The backup battery power supply fault model corresponding to the maximum similarity value is found out by searching the power supply fault model set to serve as the final output result, that is, the fault analysis result. Through the above method, the fault cause when the backup battery fails can be efficiently and accurately located, and the waste of manpower and time caused by manual checking is reduced.

[0052] In the system for improving the operation reliability of the backup battery of the electric energy meter, the calibration unit 114 includes: a search subunit, configured to search for corresponding metering data calibration data according to the backup battery power supply fault model corresponding to the fault analysis result; and an adjustment and calibration subunit, configured to adjust and calibrate the second metering data when the backup battery supplies power to the electric energy meter through the metering data calibration data to obtain calibrated metering data, so as to improve the operation reliability of the backup battery of the electric energy meter.

[0053] The calibration unit 114 can find the corresponding metering data calibration data of the corresponding backup battery power failure model based on the fault analysis result, and then based on the metering data calibration data, adjust the calibration sub-unit to realize corresponding adjustment calibration of the second metering data when the backup battery supplies power to the electric energy meter, so as to effectively ensure the accuracy of the calibrated metering data, thereby improving the operation reliability of the backup battery of the electric energy meter. For example, when the metering data is caused by a certain backup battery power failure, the clock is advanced according to the corresponding fault mode, and the clock data can be calibrated through the metering data calibration data corresponding to the corresponding backup battery power failure, so as to ensure that the metering parameters can be consistent with the clock, thereby improving the operation reliability of the backup battery of the electric energy meter.

[0054] Please refer to Figure 2 The application also provides a method for improving the operation reliability of the backup battery of the electric energy meter, comprising:

[0055] Step S10: acquiring a verification interval period for power supply verification by the periodic acquisition unit 111;

[0056] Step S20: controlling the switching power module and the backup battery to supply power to the electric energy meter based on the verification interval period by the switching control unit 112, so as to acquire first metering data and second metering data, the first metering data being acquired by the power module, and the second metering data being acquired by the backup battery;

[0057] Step S30: performing backup battery metering fault analysis based on the first metering data and the second metering data by the comparison and analysis unit 113, to obtain a fault analysis result;

[0058] Step S40: calibrating the backup battery power metering based on the fault analysis result by the calibration unit 114, to improve the operation reliability of the backup battery of the electric energy meter.

[0059] In summary, the system and method for improving the operation reliability of the backup battery of the electric energy meter disclosed in the present application can dynamically adjust the verification interval period of the backup battery power supply calibration by using the real-time changes of the current power supply condition, thereby ensuring the timing control of the power supply mode switching at the end of each verification interval period, thereby improving the timeliness of the backup battery power supply calibration. And when switching the power supply mode, the first metering data uploaded when the power supply module is powered by the external main power supply and the second metering data uploaded by the backup battery power supply can be obtained respectively. After obtaining the first metering data and the second metering data, the backup battery metering fault analysis can be further performed by comparing the first metering data and the second metering data, thereby determining the fault existing when the backup battery metering is used compared with the power supply module power supply. Then, based on the fault analysis result, the calibration scheme can be determined to calibrate the metering data generated by the backup battery power supply, thereby improving the metering accuracy of the backup battery power supply of the electric energy meter, and further improving the operation reliability of the backup battery emergency power supply of the electric energy meter. Therefore, the present application effectively overcomes the various shortcomings in the prior art and has high industrial utilization value.

[0060] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed in the present application should be covered by the claims of the present application.

Claims

1. A system for improving the reliability of operation of a backup battery of an electric energy meter, characterized by, The method comprises the following steps: a cycle acquisition unit is configured to acquire a verification interval period for power supply verification; a switching control unit is configured to control the power supply module and the backup battery to supply power to the electric energy meter based on the verification interval period, so as to acquire first metering data and second metering data, wherein the first metering data is acquired by the power supply module, and the second metering data is acquired by the backup battery; a comparison and analysis unit is configured to perform backup battery metering fault analysis based on the first metering data and the second metering data, and obtain a fault analysis result; a calibration unit is configured to calibrate backup battery power supply metering based on the fault analysis result, so as to improve the operation reliability of the backup battery of the electric energy meter; the switching control unit comprises: a first acquisition subunit is configured to acquire the first metering data of the electric energy meter in the power supply mode of the power supply module before the end of each verification interval period corresponding to each first data upload time; a second acquisition subunit is configured to receive an end signal of each verification interval period, control the power supply mode of the electric energy meter to be switched from the power supply module to the backup battery, and acquire intermediate metering data according to the power supply switching time and the data upload time when the backup battery is powered; a prediction subunit is configured to perform numerical compensation on the intermediate metering data based on the power supply switching time and the data upload time, and obtain the second metering data; the prediction subunit comprises: a linear calculation module is configured to obtain a metering change rate before the end of the corresponding verification interval period according to the first metering data and the corresponding first data upload time; a metering accumulation module is configured to obtain a predicted metering accumulation value according to the incremental change amount and the power supply switching time; and An actual change calculation module is configured to obtain an actual change rate according to the first metering data, the intermediate metering data, and an acquisition time difference between the first metering data and the intermediate metering data, the acquisition time difference being the sum of the power supply switching time and the data uploading time, and the calculation formula of the actual change rate being: , denotes the first metering data, denotes the intermediate metering data, denotes the acquisition time difference. The incremental change calculation module is configured to obtain an incremental change amount corresponding to a unit time according to a difference between the metrology change rate and the actual change rate and the acquisition time difference, and a calculation formula of the incremental change amount is: , represents the metrology change rate, represents the actual change rate; the cycle acquisition unit comprises: An optimization calculation module is configured to perform optimization adjustment on the intermediate metering data according to the predicted metering cumulative value, so as to obtain the second metering data, and a calculation formula of the second metering data is as follows: , represents a power supply switching time, represents a predicted metering cumulative value.

2. The system for improving the reliability of backup battery operation of an electric energy meter according to claim 1, characterized by, a working condition acquisition subunit is configured to acquire running working condition data of the electric energy meter, wherein the running working condition data comprises power parameters and running environment parameters; a parameter scoring subunit is configured to score the power parameters and the running environment parameters, and obtain a first emergency degree score corresponding to the power parameters and a second emergency degree score corresponding to the running environment parameters; a score fusion subunit is configured to fuse the first emergency degree score and the second emergency degree score to obtain a cycle adjustment amount, wherein the cycle adjustment amount comprises an increase adjustment amount and a decrease adjustment amount; and a dynamic adjustment subunit is configured to perform dynamic adjustment on the verification interval period according to the cycle adjustment amount, so as to acquire the verification interval period for power supply verification; the calculation formula of the verification interval period is: the parameter scoring subunit comprises: ， wherein, represents a first urgency score, represents a first weight corresponding to the first urgency score, represents a second urgency score, represents a second weight corresponding to the second urgency score, represents a verification interval period initial value, represents a reduction adjustment coefficient, represents an increase adjustment coefficient, represents a lower limit score value, represents an upper limit score value.

3. The system for improving the reliability of the backup battery operation of an electric energy meter according to claim 2, characterized in that, a first difference calculation module is configured to calculate the difference between the power parameters and a base parameter to obtain the running burden of the current electric energy meter; a first score calculation module is configured to obtain the first emergency degree score according to the running burden and a first emergency degree coefficient; the calculation formula of the first emergency degree score is: a parameter detection module is configured to detect the running environment parameters and extract target running environment parameters greater than a corresponding set threshold from the running environment parameters; ， wherein, represents an electric power parameter, represents a base parameter, represents an operation burden amount, represents an operation burden length, represents a number of operation burden lengths corresponding to the operation burden amount, represents a first emergency degree coefficient corresponding to the th operation burden length; ​ A second difference calculation module calculates the difference between the target operating environment parameter and the corresponding set threshold to obtain an environment burden corresponding to each target operating environment parameter; A second score calculation module is configured to obtain the second emergency score according to the environment burden corresponding to all target operating environment parameters and a second emergency coefficient; The calculation formula of the second emergency score is: ， wherein, represents a target operating environment parameter, represents a set threshold value, represents an environmental burden amount, represents an environmental burden length, represents a number of environmental burden lengths corresponding to the environmental burden amount, represents a first environmental burden length corresponding to the environmental burden amount, represents a second urgency coefficient corresponding to the first environmental burden length.

4. The system for improving the reliability of the backup battery operation of an electric energy meter according to claim 1, characterized in that, The comparison and analysis unit includes: A trend analysis subunit is configured to obtain a first change trend of the first measurement data with respect to the first measurement time according to the first measurement data and the corresponding first measurement time; A prediction subunit is configured to predict a speculative measurement data corresponding to the second measurement data within a second measurement time based on the first change trend; A comparison subunit is configured to compare the second measurement data with the speculative measurement data to obtain a difference value data between the second measurement data and the speculative measurement data; A first output subunit is configured to, when the difference value data is greater than a difference threshold, extract all the difference value data to obtain a difference value change curve, find a backup battery power supply fault model corresponding to the difference value change curve based on the difference value change curve, and add the backup battery power supply fault model to a backup battery power supply model constructed to perform backup battery measurement fault analysis and obtain a fault analysis result; and A second output subunit is configured to, when the difference value data is less than the difference threshold, continue to perform the steps of controlling the switching power module and the backup battery to supply power to the electric energy meter based on the verification interval period to obtain the first measurement data and the second measurement data.

5. The system for improving the reliability of backup battery operation of an electric energy meter according to claim 4, characterized in that, In the process in which the first output subunit extracts all the difference value data to obtain a difference value change curve and finds a backup battery power supply fault model corresponding to the difference value change curve based on the difference value change curve, the process further includes: A curve drawing module is configured to obtain the difference value change curve of the difference value data with respect to the second measurement time according to all the difference value data and the corresponding second measurement time; A calling module is configured to call all the fault value change curves in a backup battery power supply fault model library; and A curve comparison module is configured to sequentially compare the fault value change curves with the difference value change curve in terms of similarity to find a backup battery power supply fault model that reaches a specified similarity with the difference value change curve as the backup battery power supply fault model corresponding to the difference value change curve.

6. The system for improving the reliability of backup battery operation of an electric energy meter according to claim 4, characterized by, In the process in which the first output subunit adds the backup battery power supply fault model to the backup battery power supply model constructed to perform backup battery measurement fault analysis and obtain a fault analysis result, the process further includes: A model construction module is configured to construct a backup battery power supply model according to the power supply of the backup battery to the electric energy meter in a normal power supply state; A model updating module is configured to add the backup battery power supply fault model to the backup battery power supply model constructed to obtain an updated power supply model; A measurement simulation module is configured to output the speculative measurement data through the updated power supply model to obtain simulated measurement data; and A measurement simulation module is configured to output the speculative measurement data through the updated power supply model to obtain simulated measurement data. A metering comparison module is configured to compare the second metering data with the analog metering data to obtain a similarity value; and A result output module is configured to extract all backup battery power failure models with a similarity value greater than a similarity threshold value, construct a power failure model set, and take the backup battery power failure model corresponding to a maximum similarity value in the power failure model set as the failure analysis result.

7. The system for improving the reliability of the backup battery operation of an electric energy meter according to claim 1, characterized in that, The calibration unit comprises: A lookup subunit is configured to look up corresponding metering data calibration data according to the backup battery power failure model corresponding to the failure analysis result; and An adjustment and calibration subunit is configured to sequentially adjust and calibrate the second metering data when the backup battery supplies power to the electric energy meter through the metering data calibration data, to obtain calibrated metering data, so as to improve the operation reliability of the backup battery of the electric energy meter.

8. A method for improving the reliability of the operation of the backup battery of an electric energy meter according to any one of claims 1-7, characterized in that, It comprises: An interval period acquisition unit is configured to acquire a verification interval period for power supply verification; A switching control unit is configured to control the switching power module and the backup battery to supply power to the electric energy meter based on the verification interval period, to obtain first metering data and second metering data, the first metering data being acquired by the power module, and the second metering data being acquired by the backup battery; A comparison and analysis unit is configured to perform backup battery metering failure analysis based on the first metering data and the second metering data, to obtain a failure analysis result; A calibration unit is configured to calibrate backup battery power metering based on the failure analysis result, to improve the operation reliability of the backup battery of the electric energy meter.

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