CN114152804B - Electric energy meter with three-way array structure and measuring system and method thereof - Google Patents
Electric energy meter with three-way array structure and measuring system and method thereof Download PDFInfo
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/061—Details of electronic electricity meters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention discloses an electric energy meter with a three-way array structure and a measuring system and method thereof. An error self-checking circuit formed by adding a set of three-way array structure in a traditional electric energy meter body forms the electric energy meter with the error checking function of a user. According to the invention, the three-way array structure is introduced into the existing electric energy measurement system through the minimum line change, the electric energy measurement system with larger scale can be divided into a plurality of three-way array structures with smaller scale through the electric energy meter with the three-way array structure, each three-way array structure meets the relative energy conservation law, the error of the electric energy measurement module in each three-way array structure is calculated respectively, the multiple collinearity influence of electric energy data calculation caused by the similarity of habit of using electric energy of a user is weakened, and the calculation efficiency and calculation precision are improved.
Description
Technical Field
The invention belongs to the technical field of intelligent meter measurement, and particularly relates to an electric energy meter with a three-way array structure, and a measuring system and method thereof.
Background
Currently, a large number of flow sensors, such as electricity meters, water meters, gas meters, or other flow meters, are used because they are too large to be removed back to the laboratory for detecting flow errors. There is a need to find techniques and methods for online detection of these flow sensor errors;
for the mathematical algorithm, when the flow measurement system is relatively large, a plurality of flow sensors are included in the flow measurement system, the similarity of the user flow consumption habits can derive the multiple collinearity problem of the flow meter data, and the calculation accuracy of the data calculation method is affected.
Conventionally, flow sensors are installed on the pipeline or at the nodes of the flow measurement system to be measured, and the flow of each point is measured, and the measurement error of each flow sensor is checked separately when needed. The problem with this approach is that the flow sensor error checking is labor intensive and cost prohibitive.
In view of this, overcoming the drawbacks of the prior art is a problem to be solved in the art.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the invention provides an electric energy meter with a three-way array structure and an electric energy measuring system and an electric energy measuring method formed by the same, and aims to not only construct an electric energy measuring system with any scale through an electric energy measuring module with the three-way array structure, but also divide the electric energy measuring system with a larger scale into a plurality of three-way array structures with smaller scales through the electric energy measuring module with the three-way array structure, wherein each three-way array structure meets the law of conservation of relative energy, respectively calculates the error of the electric energy measuring module in each three-way array structure, weakens the influence of multiple collinearity on electric energy data calculation caused by the similarity of habit of using electric energy of a user, improves the calculating efficiency and the calculating precision, and solves the technical problem of multiple collinearity of electric energy data.
In order to achieve the above purpose, the first aspect of the present invention provides an electric energy meter with a three-way array structure, and an error self-checking circuit composed of a set of three-way array structures is added in a traditional electric energy meter body to form an electric energy meter with errors that can be checked by a user.
Preferably, the system comprises 1 household electric energy meter for the user to count the cost and 1 electric energy metering module with a three-way array structure, wherein an electric energy relation structure exists in the electric energy metering modules with the three-way array structure, the electric energy relation structure forms an electric energy system which accords with the electric energy conservation relation, the electric energy metering modules corresponding to the electric energy system are respectively provided with a total meter metering module, an electric energy metering module connected with the household electric energy meter in series and an electric energy metering module connected with the adjacent user electric energy meter on pipelines of 1 total meter and 2 branch meters, and the calculation of the metering errors of the total meter metering module, the electric energy metering module connected with the household electric energy meter in series and the electric energy metering module connected with the adjacent user electric energy meter is completed in a mode of connecting error reference standard devices in series or a mode of designating error reference standard devices on any pipeline, and the system is specific:
establishing a mathematical model by utilizing the electric energy conservation relation of an electric energy system, calculating the electric energy measurement errors of a total meter module, an electric energy meter module connected in series with a user electric energy meter and one or more meter modules of the electric energy meter module connected in series with an adjacent user electric energy meter respectively arranged on an electric energy measurement system pipeline of the three-way array structure through electric energy data detected by an electric energy meter module of the three-way array structure and an error reference standard device, compensating the newly measured electric energy data by utilizing the calculated errors, and continuously and iteratively calculating the measurement errors of the total meter module, the electric energy meter module connected in series with the user electric energy meter and the electric energy meter module connected in series with the adjacent user electric energy meter, and obtaining the electric energy data of the three-way array structure without errors or equal errors through error compensation;
And calculating the error of the household electric energy meter for the user to count the cost by utilizing the electric energy data of the electric energy metering module connected in series by the household electric energy meter in the electric energy meter with the three-way array structure and the electric energy data of the household electric energy meter.
Preferably, the electric energy meter with the three-way array structure is an alternating current electric energy meter or a direct current electric energy meter.
Preferably, the electric energy meter body or the meter shell of the three-way array structure is provided with or reserved with a wiring terminal for the line access of the electric energy meter of the adjacent user, so that the line access of the electric energy meter of the adjacent user is facilitated.
Preferably, the wiring terminal of the three-way array structure of the electric energy meter is internally connected with 1 electric energy metering module of the electric energy meter of the user in the user meter body, the electric energy metering modules on adjacent user electric energy meter lines connected with the wiring terminal are in serial connection, the electric energy on the same line is measured, and the electric energy data and errors of the electric energy data on the adjacent user metering modules and the adjacent user electric energy meters in the user electric energy meter body on the same line are read, calculated and analyzed, so that the magnitude transmission of the electric energy data is realized.
In a second aspect, the present invention also provides an electric energy measurement system formed by an electric energy meter with a three-way array structure, including: the electric energy meters with at least 2 adjacent three-way array structures are connected with each other, wherein an electric energy metering module in the electric energy meter with the 1 st three-way array structure, which is connected with the electric energy meters of adjacent users in series, and the electric energy meter for charging of the electric energy meter with the 2 nd three-way array structure and the electric energy metering module connected with the electric energy meter form a series connection relation, so that the electric energy meters with the 2 adjacent three-way array structures form the series connection relation and the electric energy value transmission among the electric energy meters is realized through the calculation of related electric energy data.
Preferably, each adjacent user in the power consumption system for detecting the error of the electric energy meter is connected in series through the electric energy meter of the multi-stage three-way array structure to realize electric energy data value transmission, which comprises the following specific steps:
the electric energy metering module in the electric energy meter of the upper-level three-way array structure, which is connected in series with the electric energy meter of the adjacent user, is the same as the user line detected by the electric energy metering module in the electric energy meter of the lower-level three-way array structure, which is connected in series with the electric energy meter of the adjacent user for charging the user;
the electric energy metering module in the electric energy meter of the next-stage three-way array structure, which is connected in series with the adjacent user electric energy meter, is the same as the user line detected by the electric energy metering module in the electric energy meter of the next-stage three-way array structure, which is connected in series with the adjacent user electric energy meter for charging the user;
by analogy, the setting of detecting the same user line is existed through the electric energy metering modules in the electric energy meter with the three-way array structure of two adjacent stages, so as to realize the electric energy data series connection; therefore, after the metering errors of the electric energy metering modules in the electric energy meter of the three-way array structure of any one stage are calculated, the data after corresponding metering compensation are used as the known data of the metering errors of the electric energy metering modules in the electric energy meter of the three-way array structure of the next adjacent stage.
Preferably, the electric energy measurement system comprises n electric energy meters with three-way array structures, wherein the electric energy meters with the three-way array structures are mutually independent;
the electric energy measurement system further comprises an error reference standard device, and the error reference standard device is connected in series to any pipeline branch of any three-way array structure electric energy meter of the n three-way array structures electric energy meters.
Preferably, the electric energy measurement system further comprises an error reference standard device, wherein the error reference standard device is connected in series on any branch of the electric energy meter with the three-way array structure;
when the error reference standard device is arranged on a branch of the three-way array of the last stage, transmitting a reference error value in a progressive calculation mode from a lower level to an upper level so as to calibrate the electric energy measurement system and obtain error-free data or equal error data;
when the error reference standard device is arranged on a branch of the uppermost three-way array, transmitting a reference error value in a progressive calculation mode from an upper level to a lower level so as to calibrate an electric energy measurement system and obtain error-free data or equal error data;
when the error reference standard device is arranged on a branch of the intermediate-stage three-way array, the reference error value is transmitted in a mode of progressive calculation from the intermediate stage to the upper stage and in a mode of progressive calculation from the intermediate stage to the lower stage, so that the electric energy measurement system is calibrated, and error-free data or equal error data are obtained.
Preferably, the electric energy measurement system comprises a microprocessor and a data transmission module, wherein the microprocessor is connected with each electric energy measurement module, and the data transmission module is connected with the microprocessor and used for calculating error edges of the electric energy meter with the three-way array structure and/or sending electric energy data collected from each electric energy measurement module to the cloud server.
In a third aspect, the present invention also provides a measurement method of an electric energy measurement system constituted by an electric energy meter of a three-way array structure, the electric energy system constituted by an electric energy meter of a three-way array structure comprising: the electric energy meter comprises at least two stages of three-way array structures, wherein each stage of three-way array comprises a total meter module, an electric energy meter module connected with the electric energy meter of the user in series and an electric energy meter module connected with the electric energy meter of the adjacent user in series, and the total meter module, the electric energy meter module connected with the electric energy meter of the user in series and the electric energy meter module connected with the electric energy meter of the adjacent user form a relative electric energy conservation relation;
the electric energy metering module is used for connecting the electric energy meter of the next three-way array structure with the electric energy meter of the adjacent user in series, so that each adjacent user in the existing electric energy measuring system can complete the series connection and electric energy data value transmission through the electric energy meter of the multi-stage three-way array structure;
The error checking method comprises the following steps:
designating or establishing an error reference standard device in the electric energy measurement system and giving a reference error value to the error reference standard device;
collecting original measurement data of electric energy metering modules of electric energy meters of all tee-joint array structures in the electric energy measuring system and original measurement data of the error reference standard device;
calculating to obtain reference measurement error values of a total meter module, an electric energy meter module connected in series with a home electric energy meter and an electric energy meter module connected in series with an adjacent user electric energy meter in the tee array where the error reference standard device is located by utilizing a mathematical model established by a relative electric energy conservation relation;
acquiring an electric energy meter of a three-way array structure, which has a relation of a previous stage or a next stage with the electric energy meter of the three-way array structure with the reference measurement error value obtained through calculation, and calculating the reference measurement error value of a total meter metering module, an electric energy metering module connected in series with the electric energy meter of the user and an electric energy metering module connected in series with the electric energy meter of the adjacent user in the corresponding previous stage or the next stage by utilizing the relative electric energy conservation relation;
And calculating the reference measurement error value process of the electric energy metering modules in the electric energy meters of the three-way array structure through one or more previous or next stages, so as to obtain the reference measurement error values of the electric energy metering modules in the electric energy meters of all the three-way array structures in the electric energy measuring system, and compensating the original measurement data according to the reference measurement error values of the electric energy metering modules in the electric energy meters of each three-way array structure to obtain the equal-error data or error-free data.
Preferably, the compensating the original measurement data according to the reference measurement error values of each total meter measurement module, the electric energy measurement module connected in series with the home electric energy meter and the electric energy measurement module connected in series with the adjacent user electric energy meter to obtain the equal error data or the error-free data includes:
compensating corresponding original measurement data by using the reference measurement error value to obtain equal error data of the reference error value of each electric energy metering module relative to the error reference standard device; when the delta X deviation exists between the true error value and the reference error value of the error reference standard device, compensating the equal error data of each corresponding electric energy metering module by using the delta X deviation to obtain error-free data; or,
And directly calculating error-free data of the electric energy meter corresponding to each three-way array structure according to the real error value of the error reference standard device.
Preferably, the Δx deviation between the true error value and the reference error value of the error reference standard device is obtained, specifically:
taking down the electric energy metering module selected as an error reference standard device, and measuring the real error value of the taken-down electric energy metering module; and subtracting the reference error value of the selected electric energy metering module from the actual error value of the removed electric energy metering module to obtain DeltaX deviation.
Preferably, the error reference standard means and the assigned reference error value are determined, in particular:
a first electric energy metering module unit with a known true error value is connected in series on any pipeline branch of an electric energy meter with any three-way array structure of the electric energy metering system;
in the operation process of the electric energy measurement system, respectively reading the electric energy data of the first electric energy measurement module unit and the electric energy data of the electric energy measurement module on the selected branch, and calculating the real error value of the electric energy measurement module on the selected branch;
the electric energy metering modules on the selected branches serve as error reference standard devices, and the calculated actual error values of the electric energy metering modules on the selected branches are used for calculating the actual error values of each connected electric energy metering module in the electric energy measuring system.
Preferably, the error reference standard device comprises:
in the electric energy measurement system, after an electric energy measurement module is optionally taken as an error reference standard device, a preset reference error value is matched with the measurement error of the error reference standard device, wherein the difference value between the preset reference error value and the real error value of the error reference standard device is equal to DeltaX deviation.
Preferably, the method for measuring the electric energy system formed by the tee joint array further comprises the following steps:
after the original measurement data of the electric energy metering module are collected, determining the similarity condition of each original measurement data;
if the similarity of at least two groups of original measurement data is larger than a preset similarity threshold, adopting a hierarchical calculation mode to calculate measurement errors of each electric energy metering module in a cascading manner so as to verify the original measurement data;
if the similarity of each group of original measurement data is smaller than a preset similarity threshold value, the sub-meter electric energy metering module positioned in the last-stage three-way array and the total meter metering module positioned in the uppermost-stage three-way array are subjected to relative electric energy conservation relationship to obtain measurement errors of the corresponding electric energy metering modules so as to verify the original measurement data.
Preferably, after completing the layout of the three-way array in the electric energy measurement system and completing the calculation of the electric energy measurement errors of the electric energy measurement modules respectively arranged on the electric energy measurement system lines, the continuous iterative calculation of the errors of the electric energy measurement modules in the electric energy system on the corresponding pipeline is completed by using the measurement data with the corrected errors in the three-way array.
In general, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects: the invention provides an electric energy meter with a three-way array structure and an electric energy measuring system and a measuring method formed by the same.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings that are required to be used in the embodiments of the present invention will be briefly described below. It is evident that the drawings described below are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
Fig. 1 is a schematic structural diagram of an electric energy meter with a three-way array structure according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an electric energy meter with a three-way array structure according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a measurement system of an electric energy meter with a three-way array structure according to an embodiment of the present invention;
fig. 4 is a schematic circuit structure diagram based on a sharing standard according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a method for measuring an electrical energy system formed by a three-way array according to an embodiment of the present invention;
FIG. 6 is a flow chart of a first implementation of step 10 of FIG. 5 provided by an embodiment of the present invention;
FIG. 7 is a flow chart of a second implementation of step 10 of FIG. 5 provided by an embodiment of the present invention;
FIG. 8 is a flow chart of a third implementation of step 10 of FIG. 5 provided by an embodiment of the present invention;
fig. 9 is a schematic structural diagram of an error measurement device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The error reference standard device refers to a standard device used as an error reference standard, so that the error reference standard device is determined in the description, and in a certain sense, electric energy data reported by the error reference standard device is used as an error reference standard for breaking homogeneous equations in the calculation process. Whether using physical experimentation or mathematical calculations, the measurement of any one quantity is relative to a reference datum; any one measurement error is detected relative to an error reference standard, and the etalon or data for the error reference standard is referred to as the error reference standard. For example, a "standard meter" in the experiment of error checking of the conventional electric energy meter is an error reference standard. When calculating errors by using the power data, the data errors of the power metering module used as the reference datum are the error reference standard calculated at this time.
The constant error data according to the present invention is: for any one power metering module with errors, after the measured errors are detected, the detected error values are used for carrying out error calibration processing on the original measured data (the original measured data has errors) of the power metering module, and all the errors of the obtained calibrated power data are still equal to the errors brought by a method for detecting the errors. These calibrated power data are referred to as "equierror" data. The "isoerror" is equal to the error value of the error reference standard itself (also described as Δx deviation in various embodiments of the invention). Under the concept of the same error, after error calibration processing, the measurement error of each piece of electric energy data of the sensing system is the same. The concept of error is an effective theory which is proposed by the inventor after years of research aiming at the field of sensing systems.
The error-free data according to the invention are: for any isoerror data, when its "isoerror" is measured and calibrated, the resulting data is error-free data. In view of the fact that it is theoretically impossible to have absolute error-free data, it is possible in other words that the error-free data is data with no errors or negligible errors.
Example 1:
as shown in fig. 1 and fig. 2, the electric energy meter with the error self-checking function composed of the three-way array structure comprises 1 electric energy meter of the user and 1 electric energy meter with the three-way array structure, wherein the electric energy meter with the three-way array structure comprises an electric energy relation structure, the electric energy relation structure forms an electric energy system conforming to the electric energy conservation relation, a total surface metering module, an electric energy metering module connected with the electric energy meter of the user in series and an electric energy metering module connected with the electric energy meter of the adjacent user are respectively arranged on pipelines, and the total surface metering module, the electric energy metering module connected with the electric energy meter of the user in series and the electric energy metering module connected with the electric energy meter of the adjacent user in series are calculated in a mode of connecting error reference standard devices in series on any pipeline, and the specific steps are as follows:
establishing a mathematical model by utilizing the electric energy conservation relation of an electric energy system, calculating the electric energy measurement errors of a total meter measuring module, an electric energy measuring module connected in series with the electric energy meter of the user and an electric energy measuring module connected in series with the electric energy meter of the adjacent user which are respectively arranged on the pipeline of the electric energy measuring system of the electric energy meter of the three-way array structure through the electric energy data detected by the electric energy measuring module of the three-way array structure and the error reference standard device, and utilizing the calculated errors to compensate the newly measured electric energy data, and continuously iterating to calculate the measurement errors of the total meter measuring module, the electric energy measuring module connected in series with the electric energy meter of the user and the electric energy measuring module connected in series with the electric energy meter of the adjacent user to obtain the electric energy meter of the three-way array structure without errors or equal errors; the method is based on the fact that the measurement error of the electric energy sensing unit is continuously calculated in an iterative manner until the difference between the calculated error values is smaller than a preset value (the preset value is obtained according to experience and test experiments and is not described in detail herein), and then the error-free or equal error value of each electric energy sensor in the single-phase three-way array structure electric energy sensor can be determined.
And calculating the error of the household electric energy meter for the user to charge by utilizing the electric energy data of the electric energy metering module connected in series by the household electric energy meter in the electric energy meter with the three-way array structure and the electric energy data of the household electric energy meter for the user to charge.
According to the embodiment of the invention, the three-way array structure is introduced into the existing electric energy measurement system through the minimum line change, the electric energy measurement system with a larger scale can be divided into a plurality of three-way array structures with smaller scales through the electric energy meter with the three-way array structure, each three-way array structure meets the relative energy conservation law, the error of the electric energy measurement module in each three-way array structure is calculated respectively, the multiple collinearity influence on electric energy data calculation caused by the habit similarity of using electric energy of a user is weakened, and the calculation efficiency and calculation precision are improved.
The embodiment of the invention utilizes the electric energy meter with the three-way array structure to construct the error self-checking electric energy meter, the error self-checking is realized by the electric energy meter with the three-way array structure, and the voltage signal of the subscriber line is used in the error self-checking calculation process.
In the embodiment of the invention, the power utilization line of an adjacent user is required to be connected into the error self-checking electric energy meter which is constructed by the electric energy metering module with the three-way array structure (the invention is used for connecting the power utilization line of the adjacent user into the adjacent road of the adjacent user), and in order to realize the error self-checking, the power utilization line self-carrying electric energy metering module of the adjacent user is respectively connected with the line voltage of the user through voltage signal switching and the voltage signal of the adjacent user, so that the electric energy in two situations is respectively measured. The use of the subscriber line voltage signal to measure the electric energy of the adjacent subscriber line is to calculate the error of the electric energy metering module by a three-way array, and the use of the adjacent subscriber line voltage signal to measure the electric energy of the adjacent subscriber line is to utilize the error of the error-acid adjacent subscriber electric energy meter calculated by the above (another electric energy meter which uses the error self-checking of the electric energy metering module structure of the three-way array structure).
The embodiment of the invention is a so-called error standard for the user's' error self-checking electric energy meter constructed by the electric energy metering module with the three-way array structure ', and in the invention, the' adjacent user's error self-checking electric energy meter constructed by the electric energy metering module with the three-way array structure'. Alternatively, the error standard is a "error self-checking electric energy meter constructed by an electric energy metering module of three-way array structure" of an adjacent user.
The embodiment of the invention discloses an error self-checking electric energy meter constructed by an electric energy metering module with a three-way array structure, which is used by a user, and a third party, namely the error self-checking electric energy meter constructed by the electric energy metering module with the three-way array structure.
Example 2:
the present invention also provides an electric energy measurement system formed by the electric energy meter with the three-way array structure, as shown in fig. 3, in the electric energy system provided with the electric energy meter with the three-way array structure according to embodiment 1, the electric energy measurement system comprises: comprising the following steps: the electric energy meter of the three-way array structure comprises 1 total meter module positioned on the inflow side, 2 electric energy meter modules positioned in series with the electric energy meter of the user and an electric energy meter module connected in series with the electric energy meter of the adjacent user, wherein the total meter module is used for measuring the total electric energy of the first adjacent user and the second adjacent user; the total meter measuring module 1 positioned on the inflow side, the electric energy measuring module 2 positioned in the serial connection of the user electric energy meters and the electric energy measuring module connected in serial connection with the adjacent user electric energy meters form a relative electric energy conservation relation;
The electric energy meter comprises an electric energy meter, a power supply module and a power supply module, wherein the electric energy meter is in series connection with the electric energy meter of adjacent users aiming at the electric energy meter of the adjacent two-stage three-way array structure, the electric energy meter of the upper-stage three-way array structure is in series connection with the electric energy meter of the adjacent users, and the electric energy meter of the lower-stage three-way array structure is in series connection with the electric energy meter of the user electric energy meter, so that each adjacent user in the existing electric energy measurement system can complete electric energy data series connection through the electric energy meter of the multi-stage three-way array structure.
The embodiment of the invention provides a measuring system formed by electric energy meters with three-way array structures, wherein the electric energy meters with three-way array structures not only can construct electric energy measuring systems with any scale, but also can divide the electric energy measuring systems with larger scale into a plurality of three-way array structures with smaller scale through the electric energy meters with three-way array structures, each three-way array structure meets the law of conservation of relative energy, the error of an electric energy metering module in each three-way array structure is calculated respectively, the influence of multiple collinearity on electric energy data calculation caused by the similarity of habit of using electric energy of a user is weakened, and the calculation efficiency and calculation precision are improved.
In combination with the embodiment of the invention, there is a preferred implementation scheme, wherein the electric energy data concatenation is completed by each adjacent user in the existing electric energy measurement system through the electric energy meter with a multi-stage three-way array structure, specifically:
The electric energy metering modules connected in series with the adjacent user electric energy meters in the electric energy meters of the upper-level three-way array structure are the same as the user lines detected by the electric energy metering modules connected in series with the user electric energy meters in the electric energy meters of the lower-level three-way array structure;
the electric energy metering modules connected in series with the adjacent user electric energy meters in the electric energy meter of the next-stage three-way array structure are the same as the user lines detected by the electric energy metering modules connected in series with the user electric energy meters in the electric energy meter of the next-stage three-way array structure;
by analogy, the setting of detecting the same user line is existed through the electric energy metering modules in the electric energy meter with the adjacent two-stage three-way array structure, so that the electric energy data series connection is realized; therefore, after the metering errors of the electric energy metering modules in the electric energy meter of any one-stage three-way array structure are calculated, the data after corresponding metering compensation are used as known data for calculating the metering errors of all the electric energy metering modules in the electric energy meter of the adjacent next-stage three-way array structure.
In combination with the embodiment of the invention, a preferred implementation scheme exists, and the electric energy measurement system comprises n electric energy meters with three-way array structures, wherein the electric energy meters with the three-way array structures are mutually independent;
The electric energy measurement system further comprises an error reference standard device, and the error reference standard device is connected in series to any pipeline branch of any three-way array structure electric energy meter of the n three-way array structures electric energy meters.
In combination with the embodiment of the invention, a preferred implementation scheme exists, and the electric energy measurement system further comprises an error reference standard device which is connected in series on any branch of the electric energy meter with the three-way array structure;
when the error reference standard device is arranged on a branch of the three-way array of the last stage, transmitting a reference error value in a progressive calculation mode from a lower level to an upper level so as to calibrate the electric energy measurement system and obtain error-free data or equal error data;
when the error reference standard device is arranged on a branch of the uppermost three-way array, transmitting a reference error value in a progressive calculation mode from an upper level to a lower level so as to calibrate an electric energy measurement system and obtain error-free data or equal error data;
when the error reference standard device is arranged on a branch of the intermediate-stage three-way array, the reference error value is transmitted in a mode of progressive calculation from the intermediate stage to the upper stage and in a mode of progressive calculation from the intermediate stage to the lower stage, so that the electric energy measurement system is calibrated, and error-free data or equal error data are obtained.
In combination with the embodiment of the invention, a preferred implementation scheme exists, the electric energy measurement system comprises a microprocessor and a data transmission module, the microprocessor is connected with each electric energy measurement module, and the data transmission module is connected with the microprocessor and is used for calculating error edges of the electric energy meter with the three-way array structure and/or sending electric energy data acquired from each electric energy measurement module to the cloud server.
Example 3:
the embodiment of the invention also provides a measuring method of the electric energy system formed by the three-way array, the electric energy system formed by the electric energy meter with the three-way array structure comprises the following steps: the electric energy meter comprises at least two stages of three-way array structures, wherein each stage of three-way array comprises 1 total meter measuring module positioned at the inflow side, 2 electric energy measuring modules positioned at the user electric energy meter in series connection and electric energy measuring modules connected with the adjacent user electric energy meters in series, and the relative electric energy conservation relation is formed by the 1 total meter measuring module positioned at the inflow side, the 2 electric energy measuring modules positioned at the user electric energy meter in series connection and the electric energy measuring modules connected with the adjacent user electric energy meters in series connection;
the electric energy meter comprises an electric energy meter, a power supply module and a power supply module, wherein the electric energy meter is in series connection with the electric energy meter of adjacent users aiming at the electric energy meter of the adjacent two-stage three-way array structure, and the electric energy meter of the upper-stage three-way array structure is the electric energy meter of the next-stage three-way array structure;
The error checking method comprises the following steps:
designating or establishing an error reference standard device in the electric energy measurement system and giving a reference error value to the error reference standard device;
collecting raw measurement data of an input branch and an electric energy metering module corresponding to each user on an output branch in the electric energy measuring system, and raw measurement data of the error reference standard device;
calculating to obtain reference measurement error values of a total meter module, an electric energy meter module connected in series with a home electric energy meter and an electric energy meter module connected in series with an adjacent user electric energy meter in the tee array where the error reference standard device is located by utilizing a mathematical model established by a relative electric energy conservation relation;
acquiring an electric energy meter of a three-way array structure, which has a relation with an electric energy meter of a three-way array structure with a reference measurement error value obtained by calculation, and calculating the reference measurement error value of a total meter metering module, an electric energy metering module connected in series with a user electric energy meter and an electric energy metering module connected in series with an adjacent user electric energy meter in the corresponding upper-level or lower-level three-way array by utilizing a relative electric energy conservation relation;
And calculating the reference measurement error value process of the electric energy metering modules in the electric energy meters of the three-way array structure through one or more previous or next stages, so as to obtain the reference measurement error values of the electric energy metering modules in the electric energy meters of all three-way array structures in the electric energy measuring system, and compensating the original measurement data according to the reference measurement error values of the electric energy metering modules in the electric energy meters of each three-way array structure to obtain the equal-error data or error-free data.
The embodiment of the invention provides a measuring method formed by an electric energy meter with a three-way array structure (the electric energy meter with the three-way array structure is expressed in the embodiment 1), wherein the electric energy meter with the three-way array structure not only can construct an electric energy measuring system with any scale, but also can divide the electric energy measuring system with a larger scale into a plurality of three-way array structures with smaller scales through the electric energy meter with the three-way array structure, each three-way array structure meets the relative energy conservation law, the error of an electric energy measuring module in each three-way array structure is calculated respectively, the influence of multiple collinearity on electric energy data calculation caused by the similarity of habits of users using electric energy is weakened, and the calculating efficiency and the calculating precision are improved.
In combination with the embodiment of the present invention, there is an optional extension scheme, the compensating the original measurement data according to the reference measurement error values of each total meter measurement module, the electric energy measurement modules connected in series with the user electric energy meter and the electric energy measurement modules connected in series with the adjacent user electric energy meter, to obtain the equal error data or the error-free data includes:
compensating corresponding original measurement data by using the reference measurement error value to obtain equal error data of the reference error value of each electric energy metering module relative to the error reference standard device; when the delta X deviation exists between the true error value and the reference error value of the error reference standard device, compensating the equal error data of each corresponding electric energy metering module by using the delta X deviation to obtain error-free data; or,
and directly calculating error-free data of the electric energy meter corresponding to each three-way array structure according to the real error value of the error reference standard device.
An optional extension scheme exists in combination with the embodiment of the invention, and the delta X deviation between the true error value and the reference error value of the error reference standard device is obtained, specifically:
taking down the electric energy metering module selected as an error reference standard device, and measuring the real error value of the taken-down electric energy metering module; and subtracting the reference error value of the selected electric energy metering module from the actual error value of the removed electric energy metering module to obtain DeltaX deviation.
An optional extension scheme exists in combination with the embodiment of the invention, and the error reference standard device and the assigned reference error value are determined specifically as follows:
a first electric energy metering module with a known true error value is connected in series on any pipeline branch of an electric energy meter with any three-way array structure of the electric energy metering system;
in the operation process of the electric energy measurement system, respectively reading the electric energy data of the first electric energy measurement module and the electric energy data of the electric energy measurement module on the selected branch, and calculating the real error value of the electric energy measurement module on the selected branch;
the electric energy metering modules on the selected branches serve as error reference standard devices, and the calculated actual error values of the electric energy metering modules on the selected branches are used for calculating the actual error values of each connected electric energy metering module in the electric energy measuring system.
There is an optional extension of the embodiment of the present invention, where the reference error value of the error reference standard device includes:
in the electric energy measurement system, after any electric energy measurement module is selected as an error reference standard device, a preset reference error value is matched with a measurement error of the error reference standard device, wherein the difference value between the preset reference error value and a real error value of the error reference standard device is equal to DeltaX deviation.
An optional extension scheme exists in combination with the embodiment of the present invention, and the measurement method of the electric energy system formed by the three-way array further includes:
after the original measurement data of the electric energy metering module are collected, determining the similarity condition of each original measurement data;
if the similarity of at least two groups of original measurement data is larger than a preset similarity threshold, adopting a hierarchical calculation mode to calculate measurement errors of each electric energy metering module in a cascading manner so as to verify the original measurement data;
if the similarity of each group of original measurement data is smaller than a preset similarity threshold value, the electric energy metering modules in the last-stage three-way array are classified into meters and the total meter modules in the uppermost-stage three-way array, and the measurement errors of the corresponding electric energy metering modules are obtained by utilizing the relative electric energy conservation relation so as to verify the original measurement data.
In combination with the embodiment of the invention, an optional extension scheme exists, after the layout of the three-way array in the electric energy measurement system is completed and the calculation of the electric energy measurement errors of the electric energy measurement modules respectively arranged on the electric energy measurement system lines is completed, the continuous iterative calculation of the errors of the electric energy measurement modules in the electric energy system on the corresponding pipelines is completed by using the measurement data with the corrected errors in the three-way array.
Example 4:
at present, when the electric energy measurement system is large in scale, due to the similarity of electric energy consumption habits of users, the problem of multiple collinearity of electric energy meter data can be derived, so that the calculation efficiency is reduced, and the calculation accuracy of a data calculation method is affected. In order to solve the foregoing problems, the present embodiment provides an electric energy measurement system for facilitating error checking, in actual use, the electric energy measurement system with a pipeline of an electric energy measurement module is configured into a plurality of integrated subsystems for facilitating error calculation, the electric energy measurement system includes an electric energy meter formed by at least two stages of three-way array structures, wherein the electric energy meter formed by the three-way array structures not only can construct an electric energy measurement system of any scale, but also can divide the electric energy measurement system of a larger scale into a plurality of three-way array structures of smaller scales through the electric energy meter formed by the three-way array structures, each three-way array structure satisfies the relative energy conservation law, and calculates the error of the electric energy measurement module in each three-way array structure, thereby effectively reducing the multiple co-linearity problem of electric energy data.
The electric energy metering modules in each three-way array structure conform to the correct network topological relation. The network topology relationship refers to connection and attribution relationship between an inflow side electric energy metering module and an outflow side electric energy metering module, wherein the concept of the inflow side electric energy metering module and the outflow side electric energy metering module is relatively speaking, and the relationship is a relationship between an electric energy summary table and an electric energy sub-meter.
Referring to fig. 3, a schematic structural diagram of the electric energy measurement system of the present embodiment is described, the electric energy measurement system including: the electric energy meter of the three-way array structure comprises 1 total meter metering module positioned on the inflow side, 2 electric energy metering modules connected in series with the household electric energy meter positioned on the outflow side and electric energy metering modules connected in series with the electric energy meters of adjacent users, wherein the total meter metering modules positioned on the inflow side and the sub meter metering modules positioned on the outflow side form a relative energy conservation relation. Taking fig. 3 as an example, the total meter module 1, the electric energy meter module 1.1 and the electric energy meter module 1.2 form a relative energy conservation relationship; the total meter module 2, the electric energy meter module 2.1 and the electric energy meter module 2.2 form a relative energy conservation relation; the total meter module 3 constitutes a relative energy conservation relationship with the power meter module 3.1 and the power meter module 3.2, etc. The electric energy metering modules 1.1 and 1.2, and the electric energy metering modules 2.1 and 2.2 can be understood as sub-meter metering modules which are positioned on the outflow side and correspond to the corresponding total meter metering modules.
The meter dividing metering module is positioned on the outflow side of the electric energy metering module of the three-way array structure of the 1-in and 2-out of the upper stage and is a total meter metering module positioned on the inflow side of the electric energy metering module of the three-way array structure of the 1-in and 2-out of the lower stage. It should be noted that, in the following embodiments of the present invention, the three-way array structure in the embodiments of the present invention will be described more by the expression of 1 in and 2 out, where the 1 in and 2 out are more representative of the electric energy trend from the perspective of the metering module in the embodiments of the present invention, and the relationship between the total meter module 1 and the electric energy meter modules 1.1 and 1.2 can be considered that the corresponding total meter module 1 is in one total electric energy entry, and the corresponding electric energy meter modules 1.1 and 1.2 are presented as a 2-split electric energy technology.
The error calculation and compensation of the electric energy metering module with the 1-in and 2-out three-way array structure are explained.
For an electrical energy measurement system with 1 inlet line and 2 outlet lines, the electrical energy meets the relative energy conservation relationship, namely, the following formula is satisfied:
wherein w in the foregoing formula 0 ，x 0 And w i ，x i Representing the original measurement data and errors of the 1 total meter module and the ith power meter module respectively. Still illustrated in conjunction with FIG. 3, where w 0 、w 1 And w 2 The three-way array structure can respectively correspond to the electric energy metering data of the total metering module 1, the electric energy metering module 1.1 and the electric energy metering module 1.2, and can also be used for corresponding to the electric energy metering data of the total metering module 2, the electric energy metering module 2.1 and the electric energy metering module 2.2, namely, the three-way array structure of each 1-in and 2-out can respectively meet the energy conservation equation.
In the foregoing formula, x 0 And x i Any one of the data is a known quantity, and the error value of other electric energy metering modules can be obtained through calculation by reading the data for at least 2 times.
The readings of the total meter metering module and the electric energy metering module sub-meter are compensated by using the calculated error value, and electric energy data without errors or equal errors can be obtained:
w′ 0 ＝w 0 (1+x 0 )
w′ i ＝w i (1+x i )
wherein w' 0 And w' i And the data after compensation also satisfy the relative energy conservation relation:
in the foregoing calculation process, an error reference standard needs to be set, and error-free data or error-free data can be obtained by using the error reference standard, so as to perform error correction on the electric energy measurement system.
The selection or setting of the error reference criteria includes at least the following: a cascading calculation transfer method; a method of sharing criteria; a standard method is connected in series; post-correction methods.
The cascade calculation transfer method refers to the following steps: and selecting an electric energy metering module on a branch of the electric energy metering module with a three-way array structure of 1 in and 2 out of a certain stage as an error reference standard device, and endowing the error reference standard device with a reference error value.
Specifically, when the error reference standard device is arranged on a branch of the electric energy metering module of the three-way array structure of which the last stage is 1 in and 2 out, transmitting a reference error value in a way of progressive calculation from a lower level to an upper level so as to calibrate an electric energy metering system and obtain error-free data or equal error data; when the error reference standard device is arranged on a branch of the electric energy metering module of the three-way array structure of which the uppermost stage is 1 in and 2 out, the reference error value is transmitted in a progressive calculation mode from the upper layer to the lower layer so as to calibrate the electric energy metering system, and error-free data or equal error data are obtained. In a preferred embodiment, the error reference standard device may be disposed at an intermediate stage, so that the calibration may be performed from the intermediate stage to two ends, so as to improve the calculation efficiency, and specifically, when the error reference standard device is disposed on a branch of the electric energy metering module of the three-way array structure of 1 in and 2 out of the intermediate stage, the reference error value is transmitted by means of progressive calculation from the intermediate stage to the upper stage and progressive calculation from the intermediate stage to the lower stage, so as to calibrate the electric energy measurement system, and obtain error-free data or error-free data.
For example, "1" in each lower-level (with error values calculated) 1 in and 2 out three-way array structure of the power metering module may be the same line detected by "2" in another adjacent-level (with error yet to be calculated) three-way array structure of the power metering module; similarly, a part of "2" in each upper-level (error value calculated) three-way array structure electric energy metering module may be the same line detected by "1" in another lower-level (error yet to be calculated) "1 in 2 out three-way array structure electric energy metering module". In this way, the reference error value is transmitted in a cascading manner, and the electric energy metering modules in the electric energy meter formed by each independent three-way array structure are respectively checked.
When the delta X deviation exists between the true error value and the reference error value of the error reference standard device, the delta X deviation is utilized to compensate the equal error data of the corresponding electric energy metering modules, and error-free data are obtained. When the reference error value of the error reference standard device is the same as the true error value of the error reference standard device, the error-free data corresponding to each electric energy metering module is obtained directly according to the true error value of the error reference standard device.
The method for sharing the standard refers to the following steps: the reference electric energy metering module with known or unknown errors is connected into any branch pipeline in the electric energy meter with 1 three-way array structure in series and used as an error reference standard device, so that the electric energy meter error calculation corresponding to the three-way array structure can be completed. Then, the same reference electric energy metering module with known or unknown error is connected into any branch pipeline in the electric energy meters of the adjacent 1 three-way array structures in series through pipeline switching, and the branch pipeline is used as an error reference standard device, so that the error calculation of the electric energy meters of the adjacent three-way array structures can be completed. The error magnitude can be transferred between the electric energy meters with 2 independent three-way array structures by sharing the standard method.
Specifically, the electric energy measurement system comprises an electric energy meter with a first three-way array structure and an electric energy meter with a second three-way array structure, wherein the electric energy meter with the first three-way array structure and the electric energy meter with the second three-way array structure are mutually independent;
the electric energy measurement system further comprises an error reference standard device, wherein the error reference standard device is arranged on a pipeline branch of the electric energy meter of the first three-way array structure, and the error reference standard device is also arranged on a pipeline branch of the electric energy meter of the second three-way array structure, and a switch is arranged on the selected pipeline branch; the error reference standard device is connected in series to the electric energy meter of the first three-way array structure or the electric energy meter of the second three-way array structure selectively by switching the pipeline branch into which the error reference standard device is connected by setting the state of the switch.
For example, referring to fig. 4, the corresponding circuit structure design can be used for switching the pipeline by controlling the on-off of the corresponding switch. As shown in fig. 4, taking the electric energy meter with the three-way array structure as an example for explanation, the electric energy meter with the first three-way array structure and the electric energy meter with the second three-way array structure are mutually independent, the error reference standard device is simultaneously connected in series on one pipeline branch of the electric energy meter with the first three-way array structure and the electric energy meter with the second three-way array structure, meanwhile, a switch K1 is arranged on the pipeline branch of the electric energy meter with the first three-way array structure, the switch K1 is connected in parallel with the error reference standard device, the switch K1 and the error reference standard device are connected in series with the electric energy metering modules on the selected branch, and a switch K2 is arranged between the error reference standard device and the electric energy metering modules on the selected branch; meanwhile, a switch K3 is arranged on a pipeline branch of the electric energy meter with the second three-way array structure, the switch K3 is connected with the error reference standard device in parallel, the switch K3 and the error reference standard device are connected with the electric energy metering module on the selected branch in series, and a switch K4 is arranged between the error reference standard device and the electric energy metering module on the selected branch. The switches K1 to K4 can be specifically switch channels of relays, and the on-off of the corresponding switches K1 to K4 is controlled through the relays.
In actual use, when the switch K1 is set to be in an open state, the switch K2 is set to be in a closed state, the switch K3 is set to be in a closed state, and the switch K4 is set to be in an open state, the error reference standard device is connected in series to a pipeline corresponding to the electric energy meter of the first three-way array structure, and is used as an error reference standard to perform error check on the electric energy metering module in the electric energy meter of the first three-way array structure.
In actual use, when the switch K1 is set to be in a closed state, the switch K2 is set to be in an open state, the switch K3 is set to be in an open state, and the switch K4 is set to be in a closed state, the error reference standard device is connected in series to a pipeline corresponding to the electric energy meter of the second three-way array structure, and is used as an error reference standard to perform error check on the electric energy metering module in the electric energy meter of the second three-way array structure.
In this embodiment, the error calibration of the two mutually independent three-way array electric energy meters can be completed by one error reference standard device, and the normal operation of the two electric energy meters is not affected. In the electric energy meter with the three-way array structure, the method for sharing the standard is similar, and is not repeated here.
The serial standard method refers to the following steps: the electric energy metering module with known error is connected into any branch pipeline in the electric energy meter with the three-way array structure in series and used as an error reference standard device, so that the error calculation of the electric energy meter with the three-way array structure can be completed.
The post-correction method refers to: and selecting 1 branch electric energy metering modules in the electric energy meter with the three-way array structure, giving reference error values to the branch electric energy metering modules, and calculating the errors of all the electric energy metering modules of the electric energy meter with the three-way array structure. The electric energy metering modules on the pipelines of the selected branch are taken down from the electric energy meter with the three-way array structure, the actual error value is measured by using a standard experiment method, the deviation delta X between the set reference error value and the actual error value can be calculated, the error of all the electric energy metering modules is corrected by using the deviation, the actual error of all the electric energy metering modules can be obtained, and the original measured data is corrected, so that error-free data can be obtained.
Further, the electric energy measurement system comprises a microprocessor and a data transmission module, wherein the microprocessor is connected with each electric energy measurement module, and the data transmission module is connected with the microprocessor and used for sending electric energy data acquired by the microprocessor from each electric energy measurement module to the cloud server.
The microprocessor comprises a microprocessor, a preset number of I/O ports, a preset number of electric energy metering modules and a data transmission end, wherein the preset number of I/O ports in the microprocessor are set to be connected with the data transmission end of the preset number of electric energy metering modules. The acquisition end of the electric energy metering module sub-meter positioned at the last stage is coupled with a user line and/or a user pipeline which are responsible for detection, and is used for feeding back the actual use condition of the corresponding user to the microprocessor; the data transmission module is connected with the microprocessor, and transmits detection data acquired from each electric energy metering module to the cloud server when the detection data are needed.
In combination with the above embodiments, the electric energy measurement system provided by the invention comprises at least two stages of electric energy meters with three-way array structures, wherein the electric energy meters with three-way array structures not only can construct electric energy measurement systems with any scale, but also can divide the electric energy measurement system with larger scale into a plurality of three-way array structures with smaller scale through the electric energy meters with three-way array structures, each three-way array structure meets the law of conservation of relative energy, calculates the error of the electric energy measurement module in each three-way array structure respectively, reduces the multiple collinearity influence on electric energy data calculation caused by the habit of using electric energy by users, and improves the calculation efficiency and calculation precision.
Example 5:
in combination with the electric energy measurement system of the above embodiment, the present embodiment provides a measurement method of an electric energy system constituted by a three-way array of the electric energy measurement system, the electric energy measurement system includes: the electric energy meter of the three-way array structure comprises 1 electric energy metering module total table positioned on the inflow side and 2 electric energy metering module sub-tables positioned on the outflow side, wherein the electric energy metering module total table positioned on the inflow side and the electric energy metering module sub-table units positioned on the outflow side form a relative energy conservation relation; the electric energy metering module sub-meter unit is used for the electric energy metering module of the adjacent two-stage three-way array structure, and the electric energy metering module sub-meter unit is used for the electric energy metering module summary meter of the electric energy meter of the next-stage three-way array structure, which is positioned at the inflow side, of the electric energy meter of the upper-stage three-way array structure;
Referring to fig. 5, the method for measuring the electric energy system formed by the three-way array comprises the following steps:
step 10: an error reference standard device is assigned or built into the power measurement system and assigned a reference error value.
In this embodiment, in order to calibrate the original data, an error reference standard device is set first, and then the original measurement data is calibrated based on the error reference standard device, so as to eliminate errors and obtain more accurate electric energy data. There are at least the following ways of setting up the error reference standard means.
Mode one: by adopting a post calibration method, the determining an error reference standard device, specifically, selecting an electric energy metering module as an error reference standard device in the electric energy measurement system, obtaining a Δx deviation between a true error value of the error reference standard device and the reference error value, as shown in fig. 6, specifically includes:
step 1111: the selected power metering module is removed from the power metering system, and the true error value of the selected power metering module is measured.
Referring to fig. 3, the electric energy measurement system includes a large number of electric energy measurement modules, wherein, for each stage of electric energy meter with a three-way array structure, each electric energy meter includes 3 electric energy measurement modules, wherein, 1 electric energy measurement module total table is used for measuring inflow energy, 2 electric energy measurement module sub-tables are used for measuring branching outflow energy, and 3 electric energy measurement modules form a correct network topology relationship, and whether the network topology relationship is correct or not can be determined according to a correlation method.
For the electric energy meter with each level three-way array structure, one electric energy metering module can be selected from any one of 3 electric energy metering modules to serve as an error reference standard device.
Step 1112: and subtracting the reference error value of the selected electric energy metering module from the actual error value of the selected electric energy metering module to obtain the DeltaX deviation.
In an alternative embodiment, a numerical value is self-specified as a reference error value according to actual conditions, and a numerical value can also be selected from a standard measurement error interval as the reference error value. The reference error value may be in and out of the true measurement error of the electric energy metering module, and may not truly reflect the measurement error of the electric energy metering module. The difference between the reference error value of the error reference standard device and the true error value of the error reference standard device is equal to the DeltaX deviation.
Mode two: by adopting a serial standard method, the error determining reference standard device is specifically that a first electric energy metering module unit with a known true error value is connected in series on a branch where any electric energy metering module in the electric energy measuring system is located, and then the reference measurement error of each electric energy metering module in the electric energy measuring system is obtained through calculation, as shown in fig. 7, the specific electric energy measuring system comprises:
Step 1121: and in the operation process of the electric energy measurement system, respectively reading the electric energy data of the first electric energy measurement module unit and the electric energy data of the electric energy measurement modules on the branches, and calculating the actual error value of the electric energy measurement modules on the selected branches.
Step 1122: and the electric energy metering modules on the selected branch are used as error reference standard devices, and the calculated actual error values of the electric energy metering modules on the selected branch are used for calculating the actual error of each electric energy metering module in the electric energy metering system.
Compared with the first mode, the second mode is more suitable for the example scene of the specific application, but in the implementation process of the second mode, the interface which can be used for being inserted into the first electric energy metering module unit is also recommended to be arranged in a certain branch or a plurality of branches of the existing electric energy metering system.
Mode three: adopting a cascade calculation transmission method, wherein the electric energy measurement system and the adjacent first electric energy measurement system and/or second electric energy measurement system can construct a relative second electric energy conservation environment, and then determining an error reference standard device, specifically, arbitrarily selecting an electric energy measurement module with a known true error value from the first electric energy measurement system and/or the second electric energy measurement system as the error reference standard device; the calculating obtains a reference measurement error of each electric energy metering module in the electric energy metering system, as shown in fig. 8, specifically includes:
Step 1131: and establishing an energy equation according to the second electric energy conservation environment by using the electric energy measurement system and each electric energy measurement module in the adjacent first electric energy measurement system and/or second electric energy measurement system.
Step 1132: and calculating the true error of each electric energy metering module in the electric energy measuring system according to the true error value of the error reference standard device.
In this embodiment, an electric energy metering module having a real error value in the adjacent electric energy metering system may be selected as an error reference standard device according to the adjacent electric energy metering system having the known real error value, where the reference error value determined according to this method is the real error value (also described as a real error), so that the real error value of each electric energy metering module in the electric energy metering system to be measured can be calculated under a condition that the electric energy metering system to be measured is based on the electric energy metering system to be measured and the adjacent first electric energy metering system and/or second electric energy metering system can construct a relative second electric energy conservation environment.
In the third mode, when the error reference standard device is set, the measurement error of each electric energy metering module obtained according to the following step 12 is the true error value of each electric energy metering module, and the corresponding original data is calibrated through the true error value, so that error-free electric energy data can be obtained. In general, the third mode is the most intelligent, but the specific implementation of the third mode also puts higher demands on the architecture relationship, the sharing of data and the computing capacity of each electric energy measurement system in the current environment.
Mode four: by adopting a standard sharing mode, a reference electric energy metering module with known or unknown errors is connected into any branch pipeline in the electric energy meter with the 1 three-way array structure in series and used as an error reference standard device, and the electric energy meter error calculation corresponding to the three-way array structure can be completed. Then, the same reference electric energy metering module with known or unknown error is connected into any branch pipeline in the electric energy meters of the adjacent 1 three-way array structures in series through pipeline switching, and the branch pipeline is used as an error reference standard device, so that the error calculation of the electric energy meters of the adjacent three-way array structures can be completed. The error magnitude can be transferred between the electric energy meters with 2 independent three-way array structures by sharing the standard method.
Specifically, the electric energy measurement system comprises an electric energy meter with a first three-way array structure and an electric energy meter with a second three-way array structure, wherein the electric energy meter with the first three-way array structure and the electric energy meter with the second three-way array structure are mutually independent, namely, the electric energy meter with the first three-way array structure is subordinate to one electric energy measurement system, and the electric energy meter with the second three-way array structure is subordinate to the other electric energy measurement system; the electric energy measurement system further comprises an error reference standard device, wherein the error reference standard device is arranged on a pipeline branch of the electric energy meter of the first three-way array structure, and the error reference standard device is also arranged on a pipeline branch of the electric energy meter of the second three-way array structure, and a switch is arranged on the selected pipeline branch; the error reference standard device is connected in series to the electric energy meter of the first three-way array structure or the electric energy meter of the second three-way array structure selectively by switching the pipeline branch into which the error reference standard device is connected by setting the state of the switch.
In this embodiment, the error calibration of the two mutually independent three-way array electric energy meters can be completed by one error reference standard device, and the normal operation of the two electric energy meters is not affected.
In other ways, a standard meter can also be introduced into the power measurement system, which standard meter serves as an error reference standard. The arrangement of the error reference standard device is selected according to the actual situation, and is not particularly limited here.
Step 11: and acquiring the original measurement data of the electric energy metering modules on all input branches and output branches in the electric energy measuring system and the original measurement data of the error reference standard device.
In this embodiment, the raw measurement data of the individual electric energy metering modules may be automatically collected by the concentrator and transferred to the database server. Wherein, because of the error of the electric energy metering module, correspondingly, the original measurement data has the error.
Step 12: and calculating a reference measurement error value of an electric energy metering module in the electric energy meter with the three-way array structure in which the error reference standard device is positioned by utilizing a relative energy conservation relation aiming at the electric energy meter with the three-way array structure in which the error reference standard device is positioned.
In this embodiment, a cascade progressive calculation manner may be adopted to transfer the reference error value, so that the scale of data calculation may be reduced, the calculation efficiency may be improved, and the co-linearity problem caused by the similarity of the user electric energy data may be reduced.
Step 13: and acquiring a three-way array structure which has a relation with the electric energy measurement system of the previous stage or the next stage of the electric energy measurement module with the calculated reference measurement error value, and calculating the reference measurement error value of the electric energy measurement module in the electric energy meter of the corresponding three-way array structure of the previous stage or the next stage by utilizing the relative energy conservation relation.
Step 14: and calculating the reference measurement error value process of the electric energy metering modules in the electric energy meter with the three-way array structure through one or more previous or next stages, so as to obtain the reference measurement error values of all the electric energy metering modules in the electric energy metering system, and compensating the original measurement data according to the reference measurement error value of each electric energy metering module to obtain the equal-error data or error-free data.
In this embodiment, the corresponding raw measurement data is compensated by using the reference measurement error value, so as to obtain the equal error data of the reference error value of each electric energy metering module relative to the error reference standard device; when the delta X deviation exists between the true error value and the reference error value of the error reference standard device, compensating the equal error data of each corresponding electric energy metering module by using the delta X deviation to obtain error-free data; or,
And directly calculating error-free data corresponding to each electric energy metering module according to the real error value of the error reference standard device.
When the setting modes of the error reference standard device are different, the data calibration modes corresponding to the step 12 are also different.
When the error reference standard device is set in the second mode or the standard meter is directly referenced as the error reference standard device, the measurement error of each electric energy metering module in the electric energy measuring system is obtained based on the error reference standard device, the measurement error is the real error value of each electric energy metering module, and then the corresponding original measurement data is calibrated based on the real error value of each electric energy metering module, so that error-free data are obtained.
When the error reference standard device is selected in the foregoing manner, the measurement error of each electric energy metering module in the electric energy measuring system is obtained based on the error reference standard device, where the measurement error is a reference measurement error of each electric energy metering module, and may not be equal to the true error value. And calibrating the original measurement data according to the reference measurement errors to obtain compensated electric energy data, wherein the compensated electric energy data corresponding to each electric energy metering module is equal error data aiming at the electric energy measurement system, and error-free data can be obtained after the equal errors are required to be eliminated.
Due to the equal error theory, the true error value of each electric energy metering module minus the reference measurement error thereof is correspondingly equal to the DeltaX deviation. Therefore, one electric energy metering module can be selected at will to acquire the true error value of the electric energy metering module so as to acquire the delta X deviation of the electric energy metering system, and the compensated electric energy data of other electric energy metering modules are calibrated to acquire error-free electric energy data.
In this embodiment, after the Δx deviation is obtained, the compensated electric energy data of each electric energy metering module is calibrated according to the Δx deviation, so as to obtain error-free electric energy data of each electric energy metering module, where the error-free electric energy data is data that has no errors in theory or data that has negligible errors.
Example 6:
fig. 9 is a schematic structural diagram of an error calibration device according to an embodiment of the present invention. The error calibration device of the present embodiment includes one or more processors 41 and a memory 42. In fig. 9, a processor 41 is taken as an example.
The processor 41 and the memory 42 may be connected by a bus or otherwise, which is illustrated in fig. 9 as a bus connection.
The memory 42 is used as a non-volatile computer-readable storage medium for storing a non-volatile software program and a non-volatile computer-executable program, and is used for storing the measurement methods in embodiments 2 to 5. The processor 41 performs the measurement method by running non-volatile software programs and instructions stored in the memory 42.
Memory 42 may include high-speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, memory 42 may optionally include memory located remotely from processor 41, which may be connected to processor 41 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
It should be noted that, because the content of information interaction and execution process between modules and units in the above-mentioned device and system is based on the same concept as the processing method embodiment of the present invention, specific content may be referred to the description in the method embodiment of the present invention, and will not be repeated here.
Those of ordinary skill in the art will appreciate that all or a portion of the steps in the various methods of the embodiments may be implemented by a program that instructs associated hardware, the program may be stored on a computer readable storage medium, the storage medium may include: read Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk, optical disk, or the like.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (15)
1. The electric energy measuring system is characterized in that the electric energy meter with the three-way array structure comprises 1 household electric energy meter with the user counting expense and 1 electric energy measuring module with the three-way array structure, wherein an electric energy relation structure exists in the electric energy measuring modules with the three-way array structure, the electric energy relation structure forms an electric energy system conforming to the electric energy conservation relation, and in the electric energy measuring modules corresponding to the electric energy system, the pipeline of 1 summary meter and 2 sub meters is respectively provided with a summary meter measuring module, an electric energy measuring module connected with the household electric energy meter in series and an electric energy measuring module connected with the electric energy meter of the adjacent user in series;
in the system, a plurality of electric energy meters with three-way array structures are connected in pairs to be in a relationship capable of comparing and transmitting the magnitude, and the system comprises: the electric energy meters with at least 2 adjacent three-way array structures are connected with each other, wherein an electric energy metering module in the electric energy meter with the 1 st three-way array structure, which is connected with the electric energy meters of adjacent users in series, and the electric energy meter for charging of the electric energy meter with the 2 nd three-way array structure and the electric energy metering module connected with the electric energy meter form a series connection relation, so that the electric energy meters with the 2 adjacent three-way array structures form the series connection relation and the electric energy value transmission among the electric energy meters is realized through the calculation of related electric energy data;
The error checking method comprises the following steps:
designating or establishing an error reference standard device in the electric energy measurement system and giving a reference error value to the error reference standard device;
collecting original measurement data of electric energy metering modules of electric energy meters of all tee-joint array structures in the electric energy measuring system and original measurement data of the error reference standard device;
calculating to obtain reference measurement error values of a total meter module, an electric energy meter module connected in series with a home electric energy meter and an electric energy meter module connected in series with an adjacent user electric energy meter in the tee array where the error reference standard device is located by utilizing a mathematical model established by a relative electric energy conservation relation;
acquiring an electric energy meter of a three-way array structure, which has a relation of a previous stage or a next stage with the electric energy meter of the three-way array structure with the reference measurement error value obtained through calculation, and calculating the reference measurement error value of a total meter metering module, an electric energy metering module connected in series with the electric energy meter of the user and an electric energy metering module connected in series with the electric energy meter of the adjacent user in the corresponding previous stage or the next stage by utilizing the relative electric energy conservation relation;
Calculating a reference measurement error value process of the electric energy metering modules in the electric energy meters of the three-way array structure through one or more previous or next stages, so as to obtain reference measurement error values of the electric energy metering modules in the electric energy meters of all three-way array structures in the electric energy metering system, and compensating original measurement data according to the reference measurement error values of the electric energy metering modules in the electric energy meters of each three-way array structure to obtain equal-error data or error-free data;
the method comprises the steps of connecting a reference electric energy metering module with known or unknown errors into any branch pipeline of an electric energy meter with 1 three-way array structure in series, and using the branch pipeline as an error reference standard device to finish electric energy meter error calculation corresponding to the three-way array structure; the same reference electric energy metering module with known or unknown error is connected into any branch pipeline in the electric energy meter with the adjacent 1 three-way array structure in series through pipeline switching, and is used as an error reference standard device to finish the error calculation of the electric energy meter with the adjacent three-way array structure.
2. The electric energy measurement system composed of three-way array electric energy meters according to claim 1, wherein each adjacent user in the electric energy system to be detected for electric energy meter errors is connected in series through the electric energy meters of the multi-stage three-way array structure to realize electric energy data value transmission, specifically comprising:
The electric energy metering module in the electric energy meter of the upper-level three-way array structure, which is connected in series with the electric energy meter of the adjacent user, is the same as the user line detected by the electric energy metering module in the electric energy meter of the lower-level three-way array structure, which is connected in series with the electric energy meter of the adjacent user for charging the user;
the electric energy metering module in the electric energy meter of the next-stage three-way array structure, which is connected in series with the adjacent user electric energy meter, is the same as the user line detected by the electric energy metering module in the electric energy meter of the next-stage three-way array structure, which is connected in series with the adjacent user electric energy meter for charging the user;
by analogy, the setting of detecting the same user line is existed through the electric energy metering modules in the electric energy meter with the three-way array structure of two adjacent stages, so as to realize the electric energy data series connection; therefore, after the metering errors of the electric energy metering modules in the electric energy meter of the three-way array structure of any one stage are calculated, the data after corresponding metering compensation are used as the known data of the metering errors of the electric energy metering modules in the electric energy meter of the three-way array structure of the next adjacent stage.
3. The electric energy measurement system composed of electric energy meters with three-way array structures according to claim 1, wherein the electric energy measurement system comprises n electric energy meters with three-way array structures, wherein the electric energy meters with three-way array structures are mutually independent;
The electric energy measurement system further comprises an error reference standard device, and the error reference standard device is connected in series to any pipeline branch of any three-way array structure electric energy meter of the n three-way array structures electric energy meters.
4. The electric energy measurement system composed of the electric energy meter with the three-way array structure according to claim 1, wherein the electric energy measurement system further comprises an error reference standard device, and the error reference standard device is connected in series on any branch of the electric energy meter with the three-way array structure;
when the error reference standard device is arranged on a branch of the three-way array of the last stage, transmitting a reference error value in a progressive calculation mode from a lower level to an upper level so as to calibrate the electric energy measurement system and obtain error-free data or equal error data;
when the error reference standard device is arranged on a branch of the uppermost three-way array, transmitting a reference error value in a progressive calculation mode from an upper level to a lower level so as to calibrate an electric energy measurement system and obtain error-free data or equal error data;
when the error reference standard device is arranged on a branch of the intermediate-stage three-way array, the reference error value is transmitted in a mode of progressive calculation from the intermediate stage to the upper stage and in a mode of progressive calculation from the intermediate stage to the lower stage, so that the electric energy measurement system is calibrated, and error-free data or equal error data are obtained.
5. The system for measuring electric energy by using the three-way array electric energy meter according to claim 1, wherein the electric energy measuring system comprises a microprocessor and a data transmission module, the microprocessor is connected with each electric energy metering module, the data transmission module is connected with the microprocessor, and is used for calculating error edges of the three-way array electric energy meter and/or sending electric energy data collected from each electric energy metering module to a cloud server.
6. The electric energy measurement system of claim 1, wherein the electric energy meter of the three-way array structure is an ac electric energy meter or a dc electric energy meter.
7. The electric energy measurement system composed of the electric energy meters with the three-way array structures according to claim 1, wherein wiring terminals for the line access of the electric energy meters of adjacent users are arranged or reserved on the electric energy meter body or the meter shell of the three-way array structures, so that the line access of the electric energy meters of the adjacent users is facilitated.
8. The electric energy measurement system composed of the three-way array structure of the electric energy meter according to claim 7, wherein the wiring terminal of the three-way array structure of the electric energy meter is connected with 1 electric energy metering module of the electric energy meter of the user in the user meter body, the electric energy metering modules on the adjacent user electric energy meter lines connected with the wiring terminal are in series connection, the electric energy on the same line is measured, and the electric energy data and errors thereof on the adjacent user metering modules and the adjacent user electric energy meters in the user electric energy meter body on the same line are read and calculated and analyzed to realize the magnitude transmission of the electric energy data.
9. The measuring method of the electric energy measuring system formed by the electric energy meter with the three-way array structure is characterized in that the electric energy system formed by the electric energy meter with the three-way array structure comprises the following steps: the electric energy meter comprises at least two stages of three-way array structures, wherein each stage of three-way array comprises a total meter module, an electric energy meter module connected with the electric energy meter of the user in series and an electric energy meter module connected with the electric energy meter of the adjacent user in series, and the total meter module, the electric energy meter module connected with the electric energy meter of the user in series and the electric energy meter module connected with the electric energy meter of the adjacent user form a relative electric energy conservation relation;
the electric energy metering module is used for connecting the electric energy meter of the next three-way array structure with the electric energy meter of the adjacent user in series, so that each adjacent user in the existing electric energy measuring system can complete the series connection and electric energy data value transmission through the electric energy meter of the multi-stage three-way array structure;
the error checking method comprises the following steps:
designating or establishing an error reference standard device in the electric energy measurement system and giving a reference error value to the error reference standard device;
Collecting original measurement data of electric energy metering modules of electric energy meters of all tee-joint array structures in the electric energy measuring system and original measurement data of the error reference standard device;
calculating to obtain reference measurement error values of a total meter module, an electric energy meter module connected in series with a home electric energy meter and an electric energy meter module connected in series with an adjacent user electric energy meter in the tee array where the error reference standard device is located by utilizing a mathematical model established by a relative electric energy conservation relation;
acquiring an electric energy meter of a three-way array structure, which has a relation of a previous stage or a next stage with the electric energy meter of the three-way array structure with the reference measurement error value obtained through calculation, and calculating the reference measurement error value of a total meter metering module, an electric energy metering module connected in series with the electric energy meter of the user and an electric energy metering module connected in series with the electric energy meter of the adjacent user in the corresponding previous stage or the next stage by utilizing the relative electric energy conservation relation;
calculating a reference measurement error value process of the electric energy metering modules in the electric energy meters of the three-way array structure through one or more previous or next stages, so as to obtain reference measurement error values of the electric energy metering modules in the electric energy meters of all three-way array structures in the electric energy metering system, and compensating original measurement data according to the reference measurement error values of the electric energy metering modules in the electric energy meters of each three-way array structure to obtain equal-error data or error-free data;
The method comprises the steps of connecting a reference electric energy metering module with known or unknown errors into any branch pipeline of an electric energy meter with 1 three-way array structure in series, and using the branch pipeline as an error reference standard device to finish electric energy meter error calculation corresponding to the three-way array structure; the same reference electric energy metering module with known or unknown error is connected into any branch pipeline in the electric energy meter with the adjacent 1 three-way array structure in series through pipeline switching, and is used as an error reference standard device to finish the error calculation of the electric energy meter with the adjacent three-way array structure.
10. The method for measuring the electric energy of the electric energy measuring system composed of the three-way array electric energy meters according to claim 9, wherein the compensating the original measured data according to the reference measured error value of the electric energy metering module in each three-way array electric energy meter to obtain the equal error data or the error-free data comprises the following steps:
compensating corresponding original measurement data by using the reference measurement error value to obtain equal error data of the reference error value of each electric energy metering module relative to the error reference standard device; when the delta X deviation exists between the true error value and the reference error value of the error reference standard device, compensating the equal error data of each corresponding electric energy metering module by using the delta X deviation to obtain error-free data; or,
And directly calculating error-free data of the electric energy meter corresponding to each three-way array structure according to the real error value of the error reference standard device.
11. The method for measuring the electric energy of the electric energy measuring system composed of the three-way array structure according to claim 10, wherein the Δx deviation between the true error value and the reference error value of the error reference standard device is obtained, specifically:
taking down the electric energy metering module selected as an error reference standard device, and measuring the real error value of the taken-down electric energy metering module; and subtracting the reference error value of the selected electric energy metering module from the actual error value of the removed electric energy metering module to obtain DeltaX deviation.
12. The method for measuring the electric energy of the electric energy measuring system composed of the three-way array structure according to claim 10, wherein the error reference standard device and the assigned reference error value are determined specifically as follows:
a first electric energy metering module unit with a known true error value is connected in series on any pipeline branch of an electric energy meter with any three-way array structure of the electric energy metering system;
in the operation process of the electric energy measurement system, respectively reading the electric energy data of the first electric energy measurement module unit and the electric energy data of the electric energy measurement module on the selected branch, and calculating the real error value of the electric energy measurement module on the selected branch;
The electric energy metering modules on the selected branches serve as error reference standard devices, and the calculated actual error values of the electric energy metering modules on the selected branches are used for calculating the actual error values of each connected electric energy metering module in the electric energy measuring system.
13. The method for measuring the electric energy of the electric energy measuring system constituted by the three-way array structure according to claim 10, wherein the reference error value of the error reference standard device comprises:
in the electric energy measurement system, after an electric energy measurement module is optionally taken as an error reference standard device, a preset reference error value is matched with the measurement error of the error reference standard device, wherein the difference value between the preset reference error value and the real error value of the error reference standard device is equal to DeltaX deviation.
14. The method for measuring the electric energy of the electric energy measuring system constituted by the three-way array structure according to claim 10, characterized in that the method for measuring the electric energy of the electric energy system constituted by the three-way array further comprises:
after the original measurement data of the electric energy metering module are collected, determining the similarity condition of each original measurement data;
If the similarity of at least two groups of original measurement data is larger than a preset similarity threshold, adopting a hierarchical calculation mode to calculate measurement errors of each electric energy metering module in a cascading manner so as to verify the original measurement data;
if the similarity of each group of original measurement data is smaller than a preset similarity threshold value, the sub-meter electric energy metering module positioned in the last-stage three-way array and the total meter metering module positioned in the uppermost-stage three-way array are subjected to relative electric energy conservation relationship to obtain measurement errors of the corresponding electric energy metering modules so as to verify the original measurement data.
15. The method according to claim 9, wherein the continuous iterative calculation of the errors of the power metering modules in the power system on the corresponding pipeline is performed by using the metering data after the correction of the errors in the three-way array after the completion of the layout of the three-way array in the power metering system and the calculation of the power metering errors of the power metering modules respectively provided on the lines of the power metering system.
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