CN114152804A - 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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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 an electric energy meter which can check errors at home. The three-way array structure is introduced into the existing electric energy measuring system through minimum line modification, the electric energy measuring system with a large scale can be divided into a plurality of three-way array structures with a small scale through the electric energy meter with the three-way array structure, each three-way array structure meets the relative energy conservation law, errors of electric energy metering modules in each three-way array structure are calculated respectively, multiple collinearity influences of electric energy data calculation caused by similar habits of using electric energy by users are weakened, and the calculating efficiency and the calculating 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
At present, flow sensors such as electric meters, water meters, gas meters or other flow meters are used in large quantities, and because the quantities used in real life are too large, the flow sensors cannot be removed to detect flow errors in laboratories. There is a need to find techniques and methods for online detection of errors in these flow sensors;
for a mathematical algorithm, when a flow measurement system is large, a plurality of flow sensors are included in the flow measurement system, the multiple collinearity problem of flow meter data can be derived from the similarity of user flow consumption habits, and the calculation accuracy of the data calculation method is influenced.
Conventionally, flow sensors are installed on a pipeline or a node of a measured flow measurement system, and a flow at each point is measured, and it is necessary to separately verify a measurement error of each flow sensor. The problem that this kind of method brings is that the work load of flow sensor error check-up is huge, and the cost is too high.
In view of the above, overcoming the drawbacks of the prior art is an urgent problem in the art.
Disclosure of Invention
The invention provides an electric energy meter with a tee array structure, an electric energy measuring system formed by the electric energy meter with the tee array structure and a measuring method of the electric energy measuring system, and aims to construct the electric energy measuring system with any scale through an electric energy measuring module with the tee array structure, divide the electric energy measuring system with a large scale into a plurality of tee array structures with small scales through the electric energy measuring module with the tee array structure, meet the relative energy conservation law of each tee array structure, respectively calculate errors of the electric energy measuring module in each tee array structure, weaken multiple collinearity influences of electric energy data calculation caused by similar habits of using electric energy by users, improve the calculation efficiency and the calculation precision, and solve the technical problem of multiple collinearity of electric energy data.
In order to achieve the above object, in a first aspect, the present invention provides an electric energy meter with a three-way array structure, in which an error self-checking circuit formed by adding a set of three-way array structure in a conventional electric energy meter body forms an electric energy meter capable of checking an error at home.
Preferably, the system comprises 1 household electric energy meter for charging the household and 1 electric energy metering module with a three-way array structure, wherein, an electric energy relation structure exists in the electric energy metering module of the three-way array structure, the electric energy relation structure forms an electric energy system which accords with the electric energy conservation relation, in the electric energy metering modules corresponding to the electric energy system, pipelines of 1 master meter and 2 sub-meters are respectively provided with a master meter metering module, an electric energy metering module connected in series with the electric energy meter of the household and an electric energy metering module connected in series with the electric energy meter of the adjacent user, the calculation of the metering errors of the general meter metering module, the electric energy metering module connected in series with the household electric energy meter and the electric energy metering module connected in series with the adjacent household electric energy meter is completed in a mode of serially connecting an error reference standard device on any pipeline or in a mode of appointing the error reference standard device, and specifically:
establishing a mathematical model by utilizing the electric energy conservation relation of an electric energy system, calculating the electric energy measurement errors of one or more metering modules of a main meter metering module, an electric energy metering module of a household electric energy meter and an electric energy metering module connected with an adjacent user electric energy meter in series which are respectively arranged on an electric energy measuring system pipeline of the three-way array structure through electric energy data detected by an error reference standard device and the electric energy metering module of the three-way array structure, compensating newly measured electric energy data by utilizing the calculated errors, continuously and iteratively calculating the measurement errors of the main meter metering module, the electric energy metering module connected with the user electric energy meter in series and the electric energy metering module connected with the adjacent user electric energy meter in series, and obtaining the electric energy data of the three-way array structure without errors or with the same errors by utilizing the error compensation;
and calculating the error of the household electric energy meter for the cost of the user by utilizing the electric energy data of the electric energy metering modules connected in series with 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, a wiring terminal for accessing the circuit of the adjacent user electric energy meter is mounted or reserved on the electric energy meter body or the meter shell of the three-way array structure, so that the circuit of the adjacent user electric energy meter can be accessed conveniently.
Preferably, the wiring terminal of the electric energy meter with the three-way array structure 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 lines of the adjacent electric energy meters connected with the wiring terminal are in series connection with each other, the electric energy on the same line is measured, and the electric energy data and the errors of the electric energy data on the adjacent user metering modules in the electric energy meter body of the user and the adjacent electric energy meters on the same line are read, calculated and analyzed, so that the quantity value transmission of the electric energy data is realized.
In a second aspect, the present invention further provides an electric energy measuring system composed of electric energy meters in a three-way array structure, including: at least 2 electric energy meters with adjacent three-way array structures are connected with each other, wherein, an electric energy metering module which is connected with the electric energy meter of an adjacent user in the electric energy meter with the 1 st three-way array structure in series is connected with the electric energy metering module which is connected with the electric energy meter of the 2 nd three-way array structure in series, so that the 2 electric energy meters with the adjacent three-way array structures form the series connection relationship and realize the transmission of electric energy values between the electric energy meters through the calculation of related electric energy data.
Preferably, each adjacent user in the power utilization system for detecting the error of the electric energy meter completes serial connection through the electric energy meter with the multistage three-way array structure to realize electric energy data value transmission, and specifically comprises the following steps:
the electric energy metering module in the electric energy meter with the upper three-way array structure and connected with the adjacent user electric energy meter in series is the same as the user line detected by the electric energy metering module in the electric energy meter with the lower three-way array structure and connected with the adjacent user electric energy meter in series for charging the user;
the electric energy metering module in the electric energy meter with the next-stage three-way array structure and connected with the adjacent user electric energy meter in series is the same as the user line detected by the electric energy metering module in the electric energy meter with the next-stage three-way array structure and connected with the adjacent user electric energy meter in series for charging the user;
by analogy, the setting of detecting the same user line exists through the electric energy metering modules in the electric energy meters of the adjacent two-stage three-way array structure, so that the electric energy data series connection is realized; therefore, after the metering error of the electric energy metering module in the electric energy meter with the three-way array structure of any stage is calculated, the data after corresponding metering compensation is used as the known data for calculating the metering error of each electric energy metering module in the electric energy meter with the three-way array structure of the next stage.
Preferably, the electric energy measuring system comprises n electric energy meters with a three-way array structure, wherein every two electric energy meters with the three-way array structure are mutually independent;
the electric energy measuring system also comprises an error reference standard device which is connected in series with any pipeline branch of any three-way array structure electric energy meter of the n three-way array structure electric energy meters.
Preferably, the electric energy measuring system further comprises an error reference standard device, and the error reference standard device is connected in series to 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 last-stage three-way array, a reference error value is transmitted in a mode of progressive calculation from a lower level to an upper level so as to calibrate the electric energy measuring system to 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, a reference error value is transmitted in a mode of progressively calculating from the upper level to the lower level so as to calibrate the electric energy measuring system and obtain error-free data or equal error data;
when the error reference standard device is arranged on a branch of the middle-stage three-way array, a reference error value is transmitted in a mode of progressive calculation from the middle stage to the upper stage and in a mode of progressive calculation from the middle stage to the lower stage so as to calibrate the electric energy measuring system and obtain error-free data or equal error data.
Preferably, the electric energy measuring system comprises a microprocessor and a data transmission module, the microprocessor is connected with each electric energy metering module, and the data transmission module is connected with the microprocessor and used for calculating the error edge of the electric energy meter with the three-way array structure and/or sending the electric energy data collected from each electric energy metering module to the cloud server.
In a third aspect, the present invention further provides a measurement method for an electric energy measurement system composed of electric energy meters with a three-way array structure, where the electric energy system composed of electric energy meters with a three-way array structure includes: the electric energy meter with at least two-stage three-way array structure, wherein each stage of three-way array comprises a master meter 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 in series, and the relative electric energy conservation relation is formed by the master meter 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;
aiming at the electric energy meters with two adjacent stages of three-way array structures, the electric energy metering module which is connected with the electric energy meter of the adjacent user in series in the electric energy meter with the upper stage of three-way array structure is the electric energy metering module which is connected with the electric energy meter of the adjacent user in series in the electric energy meter with the lower stage of three-way array structure, so that the adjacent users in the existing electric energy measuring system complete series connection and electric energy data quantity value transmission through the electric energy meters with the multi-stage three-way array structures;
the error checking method comprises the following steps:
an error reference standard device is appointed or established in the electric energy measuring system, and a reference error value is given to the error reference standard device;
acquiring original measurement data of electric energy metering modules of electric energy meters with all three-way array structures in the electric energy measurement system and original measurement data of the error reference standard device;
calculating reference measurement error values of a total meter metering module in the tee array where the error reference standard device is located, an electric energy metering module in series connection with the household electric energy meter and an electric energy metering module in series connection with an adjacent user electric energy meter by using a mathematical model established by a relative electric energy conservation relation aiming at the tee array where the error reference standard device is located;
acquiring an electric energy meter with a tee array structure, which has a previous or next level relation with the electric energy meter with the tee array structure of which the reference measurement error value is calculated, and calculating the reference measurement error values of a total meter metering module in the corresponding previous or next level tee array, an electric energy metering module in series connection with the electric energy meter of the household and an electric energy metering module in series connection with the electric energy meter of the adjacent user 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 meter with the three-way array structure through one or more times of the previous stage or the next stage so as to obtain the reference measurement error values of the electric energy metering modules in the electric energy meters with 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 with each three-way array structure so as to obtain equal error data or error-free data.
Preferably, the compensating the original measurement data according to the reference measurement error value of each master meter measurement module, the electric energy measurement module connected in series with the electric energy meter of the home, and the electric energy measurement module connected in series with the electric energy meter of the adjacent user, and obtaining the equal error data or the error-free data includes:
compensating the 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 a delta X deviation exists between a real error value and a reference error value of the error reference standard device, compensating equal error data of each corresponding electric energy metering module by using the delta X deviation to obtain error-free data; alternatively, the first and second electrodes may be,
and directly calculating to obtain 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 obtaining of the Δ X deviation between the real error value and the reference error value of the error reference standard device specifically includes:
taking down the selected electric energy metering module 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 real error value of the taken-down electric energy metering module to obtain the delta X deviation.
Preferably, the error reference standard means and the assigned reference error value are determined as follows:
a first electric energy metering module unit with a known real error value is connected in series with any pipeline branch of any electric energy meter with a three-way array structure of the electric energy measuring system;
in the running process of the electric energy measuring system, respectively reading the electric energy data of the first electric energy measuring module unit and the electric energy data of the electric energy measuring module on the selected branch, and calculating the real error value of the electric energy measuring module on the selected branch;
and the electric energy metering module on the selected branch is used as an error reference standard device, and the real error value of each connected electric energy metering module in the electric energy measuring system is calculated by using the calculated real error value of the electric energy metering module on the selected branch.
Preferably, the error is referenced to a reference error value of a standard device, including:
in the electric energy measuring system, after an optional electric energy metering module is taken as an error reference standard device, a preset reference error value is matched with a measuring 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 the delta X deviation.
Preferably, the method for measuring the electric energy system formed by the three-way array further comprises:
after the original measurement data of the electric energy metering module are collected, determining the similar condition of each original measurement data;
if the similarity of at least two groups of original measurement data is greater than a preset similarity threshold, the measurement error of each electric energy metering module is calculated in a cascade mode in a grading calculation mode 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, the sub-meter electric energy metering module in the last-stage three-way array and the total meter metering module in the uppermost-stage three-way array use the relative electric energy conservation relation to obtain the measurement error of the corresponding electric energy metering module so as to check the original measurement data.
Preferably, after the layout of the tee array in the electric energy measurement system is completed, and the electric energy measurement error calculation of the electric energy measurement modules respectively arranged on the line of the electric energy measurement system is completed, the continuous iterative calculation of the error of the electric energy measurement module in the electric energy system on the corresponding pipeline is completed by using the measurement data with the corrected error in the tee array.
Generally, compared with the prior art, the technical scheme of the invention has the following beneficial effects: the invention provides an electric energy meter with a tee-joint array structure, an electric energy measuring system and a measuring method formed by the electric energy meter, wherein the tee-joint array structure is introduced into the existing electric energy measuring system through minimum line modification, the electric energy measuring system with a large scale can be divided into a plurality of tee-joint array structures with a small scale through the electric energy meter with the tee-joint array structure, each tee-joint array structure meets the law of relative energy conservation, errors of electric energy measuring modules in each tee-joint array structure are calculated respectively, multiple collinearity influences facing electric energy data calculation caused by similar habits of using electric energy by users are weakened, and the calculation efficiency and the calculation precision are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
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 diagram of a circuit structure based on a sharing standard according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a measurement method of an electric energy system formed by a three-way array according to an embodiment of the present invention;
FIG. 6 is a schematic flow chart of a first implementation manner of step 10 in FIG. 5 according to an embodiment of the present invention;
fig. 7 is a schematic flow chart of a second implementation manner of step 10 in fig. 5 according to an embodiment of the present invention;
fig. 8 is a schematic flowchart of a third implementation manner of step 10 in fig. 5 according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of an error measurement apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The error reference standard device refers to a standard device used as an error reference standard, so that the determination error in the description refers to the standard device, and the electric energy data reported by the error reference standard device is used as the error reference standard for breaking the homogeneous equation in the calculation process. Whether using physical experimentation or mathematical calculation, the measurement of any one quantity is relative to a reference; the detection of any one measurement error is relative to an error reference, and the standard or data for the error reference is referred to as the error reference. For example, a "standard meter" in the experiment of error checking of the conventional electric energy meter is an error reference standard. When the error is calculated by using the electric energy data, the data error of the electric energy metering module used as the reference datum data is the error reference standard calculated at this time.
The equal error data according to the present invention means: for any electric energy metering module with errors, after the measuring error of the electric energy metering module is detected, the detected error value is used for carrying out error calibration processing on the original measuring data (with errors) of the electric energy metering module, and the errors of all the obtained calibrated electric energy data are equal to the errors brought by the error detection method. These calibrated power data are referred to as "equal error" data. The "equal error" is equal to the error value of the error reference standard itself (also described as Δ X deviation in embodiments of the invention). Under the concept of equal error, after error calibration processing, the measurement error of each electric energy data of the sensing system is the same. The equal error concept is an effective theory which is put forward by the inventor after years of research in the field of sensing systems.
The error-free data of the invention refers to: for any equal error data, when its "equal error" is measured and calibrated, the obtained data is the error-free data. Considering that it is theoretically impossible to have absolute error-free data, it can be said in other words that error-free data is data with no or negligible errors.
Example 1:
as shown in fig. 1 and fig. 2, the electric energy meter with error self-checking function formed by the three-way array structure includes 1 household electric energy meter for charging the household and 1 electric energy meter with three-way array structure, wherein the electric energy meter with three-way array structure includes an electric energy relation structure, the electric energy relation structure constitutes an electric energy system conforming to the electric energy conservation relation, wherein the pipelines are respectively provided with a main meter metering module, an electric energy metering module connected in series with the household electric energy meter and an electric energy metering module connected in series with the adjacent household electric energy meter, and the calculation of the metering errors of the main meter metering module, the electric energy metering module connected in series with the household electric energy meter and the electric energy metering module connected in series with the adjacent household electric energy meter is completed by connecting an error reference standard device in series on any pipeline, specifically:
establishing a mathematical model by utilizing the electric energy conservation relation of an electric energy system, calculating the electric energy measurement errors of a main meter metering module, an electric energy metering module in serial connection with the household electric energy meter and an electric energy metering module in serial connection with an adjacent user electric energy meter which are respectively arranged on an electric energy measuring system pipeline of the electric energy meter with the three-way array structure through electric energy data detected by an error reference standard device, compensating newly measured electric energy data by utilizing the calculated errors, and continuously and iteratively calculating the measurement errors of the main meter metering module, the electric energy metering module in serial connection with the household electric energy meter and the electric energy metering module in serial connection with the adjacent user electric energy meter to obtain the electric energy meter with the three-way array structure without errors or the same errors; it is based on the principle that the measurement error of the electric energy sensing unit is continuously calculated in an iterative manner until the difference between the results of the calculated error values of the two times is smaller than a preset value (the preset value is obtained according to experience and test experiments, and is not specifically described here), 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 cost of the user by utilizing the electric energy data of the electric energy metering modules connected in series with 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 cost of the user.
According to the embodiment of the invention, the three-way array structure is introduced into the existing electric energy measuring system through minimum line modification, the electric energy measuring system with a large scale can be divided into a plurality of three-way array structures with a small 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 metering module in each three-way array structure is calculated respectively, the multiple collinearity influence on electric energy data calculation caused by similar habits of using electric energy by users is weakened, and the calculation efficiency and the calculation precision are improved.
The embodiment of the invention utilizes the electric energy meter with self-checking error constructed by the electric energy metering module with the three-way array structure, the self-checking error is realized by the electric energy metering module with the three-way array structure, and in the self-checking error calculation process, the voltage signal of the user line is used.
In the embodiment of the invention, an adjacent user power line is connected into the electric energy meter with self-checking error, which is constructed by using the electric energy metering module with the three-way array structure (the connection is called to be passed by the adjacent user), in order to realize self-checking error, the electric energy metering module of the adjacent user power line is respectively connected with the line voltage of the user through voltage signal switching, and the voltage signal of the adjacent user is respectively used for measuring the electric energy under two conditions. The method for measuring the electric energy of the adjacent subscriber line by using the subscriber line voltage signal is to calculate the error of the electric energy metering module by using a three-way array, and the method for measuring the electric energy of the adjacent subscriber line by using the adjacent subscriber line voltage signal is to use the calculated error to measure the error of the adjacent subscriber electric energy meter (the other electric energy meter with the error self-checking structure of the electric energy metering module with the three-way array structure).
The invention relates to an error calibrator for an electric energy meter with self-checking error constructed by an electric energy metering module of a three-way array structure of a user, and in the invention, the error calibrator is an electric energy meter with self-checking error constructed by an electric energy metering module of a three-way array structure of an adjacent user. Alternatively, for the adjacent users' electric energy meters with self-error-checking structure using the electric energy metering modules with the three-way array structure, the so-called error standard device is the electric energy meter with self-error-checking structure using the electric energy metering modules with the three-way array structure for the user in the invention.
The electric energy meter which is constructed by the electric energy metering module with the three-way array structure and has the self-checking error is required to pass through a third party, namely the electric energy meter which is constructed by the electric energy metering module with the three-way array structure and has the self-checking error.
Example 2:
the present invention also provides an electric energy measuring system composed of an electric energy meter with a 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 as described in embodiment 1, the electric energy measuring system includes: the method comprises the following steps: the electric energy meter with the at least two-stage three-way array structure comprises a total meter metering module 1 positioned on an inflow side, an electric energy metering module 2 positioned in series connection with the electric energy meter of a user and an electric energy metering module connected in series connection with the electric energy meter of an adjacent user, wherein the total meter metering module is used for measuring the total electric energy of the first adjacent user and the second adjacent user; the electric energy metering system comprises a master meter metering module, an electric energy metering module, a power meter and a power meter, wherein the master meter metering module is positioned on the inflow side, the electric energy metering module is positioned in serial connection with the household electric energy meter, and the electric energy metering module is connected with the adjacent household electric energy meter in serial connection to form a relative electric energy conservation relation;
the electric energy meter with the next three-way array structure is positioned on the electric energy metering module which is connected with the household electric energy meter in series, so that each adjacent user in the existing electric energy measuring system completes electric energy data series connection through the electric energy meters with the multi-stage three-way array structures.
The embodiment of the invention provides a measuring system formed by electric energy meters with a three-way array structure, wherein the electric energy meters with the three-way array structure can be used for constructing electric energy measuring systems with any scale, the electric energy measuring systems with larger scale can be divided into a plurality of three-way array structures with smaller scale through the electric energy meters with the three-way array structure, each three-way array structure meets the relative energy conservation law, errors of electric energy metering modules in each three-way array structure are calculated respectively, multiple collinearity influences of users on electric energy data calculation caused by similar habits of using electric energy are weakened, and the calculation efficiency and the calculation precision are improved.
In combination with the embodiment of the present invention, there is an optimal implementation scheme, where the electric energy data concatenation is completed by each adjacent user in the existing electric energy measurement system through an electric energy meter with a multi-stage three-way array structure, specifically:
the electric energy metering module in the electric energy meter of the upper three-way array structure, which is connected with the adjacent user electric energy meter in series, is the same as the user line detected by the electric energy metering module in the electric energy meter of the user in the next three-way array structure, which is connected with the user electric energy meter in series;
the electric energy metering module in the electric energy meter of the next-stage three-way array structure, which is connected with the adjacent user electric energy meters in series, is the same as the user line detected by the electric energy metering module in the electric energy meter of the current user in series in the next-stage three-way array structure;
by analogy, the setting of detecting the same user line exists through the electric energy metering modules in the electric energy meters of the adjacent two-stage three-way array structure, so that the electric energy data series connection is realized; therefore, after the metering error of the electric energy metering module in the electric energy meter with any one-level three-way array structure is calculated, the data after corresponding metering compensation is used as the known data for calculating the metering error of each electric energy metering module in the electric energy meter with the next-level three-way array structure.
In combination with the embodiment of the present invention, there is a preferred implementation scheme, where the electric energy measurement system includes n electric energy meters with a three-way array structure, where every two electric energy meters with three-way array structures are independent of each other;
the electric energy measuring system also comprises an error reference standard device which is connected in series with any pipeline branch of any three-way array structure electric energy meter of the n three-way array structure electric energy meters.
In combination with the embodiment of the present invention, there is a preferred implementation scheme, where the electric energy measurement system further includes an error reference standard device, and the error reference standard device is connected in series to 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 last-stage three-way array, a reference error value is transmitted in a mode of progressive calculation from a lower level to an upper level so as to calibrate the electric energy measuring system to 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, a reference error value is transmitted in a mode of progressively calculating from the upper level to the lower level so as to calibrate the electric energy measuring system and obtain error-free data or equal error data;
when the error reference standard device is arranged on a branch of the middle-stage three-way array, a reference error value is transmitted in a mode of progressive calculation from the middle stage to the upper stage and in a mode of progressive calculation from the middle stage to the lower stage so as to calibrate the electric energy measuring system and obtain error-free data or equal error data.
In combination with the embodiment of the present invention, there is a preferred implementation scheme, where the electric energy measurement system includes a microprocessor and a data transmission module, the microprocessor is connected to each electric energy metering module, and the data transmission module is connected to the microprocessor, and is used for calculating an error edge of an electric energy meter with a three-way array structure, and/or is used for sending electric energy data collected from each electric energy metering module to a cloud server.
Example 3:
the embodiment of the invention also provides a measuring method of an electric energy system formed by the three-way array, and the electric energy system formed by the electric energy meter with the three-way array structure comprises the following steps: the electric energy meter with at least two stages of three-way array structures, wherein each stage of three-way array comprises 1 total meter metering module positioned at the inflow side, 2 electric energy metering modules positioned at the household electric energy meter in series connection, and electric energy metering modules connected with adjacent household electric energy meters in series connection, and the relative electric energy conservation relation is formed by the 1 total meter metering module positioned at the inflow side, the 2 electric energy metering modules positioned at the household electric energy meter in series connection, and the electric energy metering modules connected with the adjacent household electric energy meters in series connection;
aiming at the electric energy meters with two adjacent stages of three-way array structures, the electric energy metering module which is positioned in the electric energy meter with the upper stage of three-way array structure and is connected with the electric energy meters of the adjacent users in series is the electric energy metering module which is positioned in the electric energy meter with the lower stage of three-way array structure and is connected with the electric energy meters of the household in series, so that the electric energy data connection of each adjacent user in the existing electric energy measuring system is completed through the electric energy meters with the multi-stage three-way array structure;
the error checking method comprises the following steps:
an error reference standard device is appointed or established in the electric energy measuring system, and a reference error value is given to the error reference standard device;
acquiring original measurement data of an input branch and an electric energy metering module on an output branch corresponding to each user in the electric energy measurement system and original measurement data of the error reference standard device;
calculating reference measurement error values of a total meter metering module in the tee array where the error reference standard device is located, an electric energy metering module in series connection with the household electric energy meter and an electric energy metering module in series connection with an adjacent user electric energy meter by using a mathematical model established by a relative electric energy conservation relation aiming at the tee array where the error reference standard device is located;
acquiring an electric energy meter with a tee array structure, which has a relation with an upper-stage or lower-stage electric energy measurement system with the electric energy meter with the tee array structure of which the reference measurement error value is obtained through calculation, and calculating the reference measurement error values of a total meter metering module in the corresponding upper-stage or lower-stage tee array, an electric energy metering module in series connection with the electric energy meter of the household and an electric energy metering module in series connection with an adjacent electric energy meter of the household 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 meter with the three-way array structure through one or more times of the previous stage or the next stage, thereby obtaining the reference measurement error values of the electric energy metering modules in the electric energy meters with 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 with each three-way array structure to obtain equal error data or error-free data.
The embodiment of the invention provides a measuring method for an electric energy meter with a three-way array structure (expressed as the electric energy meter with the three-way array structure in the embodiment 1), wherein the electric energy meter with the three-way array structure can not only construct an electric energy measuring system with any scale, 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 meter with the three-way array structure, each three-way array structure meets the relative energy conservation law, errors of electric energy metering modules in each three-way array structure are respectively calculated, multiple collinearity influences of electric energy data calculation caused by similar habits of using electric energy by users are 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, where the compensating the original measurement data according to the reference measurement error value of each total meter measurement module, the electric energy measurement module connected in series with the household electric energy meter, and the electric energy measurement module connected in series with the adjacent household electric energy meter, and obtaining the equal error data or the error-free data includes:
compensating the 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 a delta X deviation exists between a real error value and a reference error value of the error reference standard device, compensating equal error data of each corresponding electric energy metering module by using the delta X deviation to obtain error-free data; alternatively, the first and second electrodes may be,
and directly calculating to obtain 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 expansion scheme exists in combination with the embodiment of the invention, and the delta X deviation between the real error value and the reference error value of the error reference standard device is obtained, specifically:
taking down the selected electric energy metering module 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 real error value of the taken-down electric energy metering module to obtain the delta X deviation.
An optional extension exists in conjunction with the embodiments of the present invention to determine an error reference standard device and a reference error value assigned thereto, specifically:
a first electric energy metering module with a known real error value is connected in series with any pipeline branch of any electric energy meter with a three-way array structure of the electric energy measuring system;
in the running process of the electric energy measuring system, respectively reading the electric energy data of the first electric energy measuring module and the electric energy data of the electric energy measuring module on the selected branch, and calculating the real error value of the electric energy measuring module on the selected branch;
and the electric energy metering module on the selected branch is used as an error reference standard device, and the real error value of each connected electric energy metering module in the electric energy measuring system is calculated by using the calculated real error value of the electric energy metering module on the selected branch.
An optional extension exists in conjunction with the embodiments of the present invention, where the error is referred to a reference error value of a standard device, including:
in the electric energy measuring system, after any electric energy metering module is selected as an error reference standard device, a preset reference error value is matched with the measuring 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 the delta X deviation.
An optional extension scheme exists in combination with the embodiment of the present invention, and the method for measuring 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 similar condition of each original measurement data;
if the similarity of at least two groups of original measurement data is greater than a preset similarity threshold, the measurement error of each electric energy metering module is calculated in a cascade mode in a grading calculation mode 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, the electric energy metering modules in the last-stage three-way array are separated into meters, and the electric energy metering modules in the top-stage three-way array and the total meter metering module in the top-stage three-way array utilize the relative electric energy conservation relation to obtain the measurement errors of the corresponding electric energy metering modules so as to check the original measurement data.
An optional extension scheme exists in combination with the embodiment of the invention, and after the layout of the tee array in the electric energy measurement system is completed and the electric energy measurement error calculation of the electric energy measurement modules respectively arranged on the circuit of the electric energy measurement system is completed, the continuous iterative calculation of the error of the electric energy measurement module in the electric energy system on the corresponding pipeline is completed by using the measurement data with the corrected error in the tee array.
Example 4:
at present, when the scale of an electric energy measurement system is large, due to the similarity of electric energy consumption habits of users, the problem of multiple collinearity of electric energy meter data is derived, so that not only can the calculation efficiency be reduced, but also the calculation accuracy of the data calculation method is influenced. In order to solve the foregoing problems, in an embodiment, an electric energy measurement system convenient for error calibration is provided, and in actual use, the electric energy measurement system of a pipeline with an electric energy metering module is configured as a structure that a plurality of subsystems convenient for error calculation are integrated, and the electric energy measurement system includes an electric energy meter that is configured by at least two stages of tee-joint array structures, where the electric energy meter that is configured by the tee-joint array structure not only can configure an electric energy measurement system of any scale, but also can divide an electric energy measurement system with a larger scale into a plurality of tee-joint array structures with a smaller scale through the electric energy meter that is configured by the tee-joint array structure, and each tee-joint array structure satisfies a relative energy conservation law, and respectively calculates an error of the electric energy metering module in each tee-joint array structure, so that multiple collinearity problems of electric energy data can be effectively reduced.
And the plurality of electric energy metering modules in each three-way array structure accord with a correct network topological relation. The network topology relationship refers to the connection and affiliation relationship between the inflow-side electric energy metering module and the 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 is a relationship between an electric energy total meter and an electric energy sub meter.
With reference to fig. 3, a schematic structural diagram of the electric energy measurement system of the present embodiment is described, and the electric energy measurement system includes: the electric energy meter with at least two stages of three-way array structures comprises 1 total meter metering module positioned at the inflow side, 2 electric energy metering modules connected in series with the household electric energy meter positioned at the outflow side, and electric energy metering modules connected in series with the adjacent household electric energy meters, wherein the 1 total meter metering module positioned at the inflow side and the 2 sub meter metering modules positioned at the outflow side form a relative energy conservation relation. Taking fig. 3 as an example, the total meter metering module 1, the electric energy metering module 1.1 and the electric energy metering module 1.2 form a relative energy conservation relation; the general meter metering module 2, the electric energy metering module 2.1 and the electric energy metering module 2.2 form a relative energy conservation relation; the general meter metering module 3, the electric energy metering module 3.1 and the electric energy metering module 3.2 form a relative energy conservation relation and the like. The electric energy metering module 1.1 and the electric energy metering module 1.2, and the electric energy metering module 2.1 and the electric energy metering module 2.2 can be understood as 2 sub-meter metering modules which are positioned at the outflow side and correspond to the corresponding general meter metering module.
The electric energy metering modules of the three-way array structure with the adjacent two stages of 1 in and 2 out are respectively a sub-meter metering module positioned at the outflow side in the electric energy metering module of the three-way array structure with the upper stage 1 in and 2 out and a main meter metering module positioned at the inflow side for the electric energy metering module of the three-way array structure with the lower stage 1 in and 2 out. It should be added 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 2 out, where the so-called 1 in 2 out in the embodiments of the present invention more represents the electric energy trend from the perspective of the metering module, and the relationship between the total metering module 1 and the electric energy metering modules 1.1 and 1.2 can be regarded as that the corresponding total metering module 1 is in one total electric energy inlet, and the corresponding electric energy metering modules 1.1 and 1.2 are presented as 2 sub-electric energy technologies.
The explanation shows the error calculation and compensation of the electric energy metering module with the 1-in 2-out three-way array structure.
For a 1 inflow line and 2 outflow line power measurement system, the power conforms to the relative power conservation relationship, i.e., the following equation is satisfied:
wherein w is in the above formula0，x0And wi，xiAnd the data respectively represent the original measurement data and the error of the 1 summary meter metering module and the ith electric energy metering module. Still illustrated in conjunction with FIG. 3, wherein w0、w1And w2The energy metering data of the total metering module 1, the energy metering module 1.1 and the energy metering module 1.2 can be respectively corresponding to the energy metering data, and the energy metering data of the total metering module 2, the energy metering module 2.1 and the energy metering module 2.2 can also be corresponding to the energy metering data, namely the respective 1-in 2-out three-way array structures can respectively meet the energy conservation equation.
In the foregoing formula, x0And xiThe error value of other electric energy metering modules can be obtained by reading data for not less than 2 times by calculation when any one of the electric energy metering modules is a known quantity.
The error value obtained by calculation is used for compensating the reading of the sub-meters of the general meter metering module and the electric energy metering module, so that electric energy data without errors or the like can be obtained:
w′0＝w0(1+x0)
w′i＝wi(1+xi)
wherein, w'0And w'iRespectively representing the electric energy data of the main meter metering module and the sub-meter of the electric energy metering module after compensation, wherein the compensated data also meet the relative energy conservation relation:
in the foregoing calculation process, an error reference standard needs to be set, and error-free data or equal error data can be obtained through the error reference standard, so that error correction is performed on the electric energy measurement system.
The selection or setting of the reference standard for error includes at least the following ways: a cascade computing transfer method; a method of sharing a standard; a standard method of concatenation; and (4) a post correction method.
The cascade computation transfer method comprises the following steps: selecting an electric energy metering module as an error reference standard device on a branch of the electric energy metering module of the three-way array structure from the inlet 1 to the outlet 2 of a certain stage, and giving a reference error value to the error reference standard device.
Specifically, when the error reference standard device is arranged on a branch of the electric energy metering module of the three-way array structure with the last stage 1 in and 2 out, a reference error value is transmitted in a mode of progressive calculation from a lower stage to an upper stage so as to calibrate the electric energy measuring system to 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 with the top level 1 inlet and the top level 2 outlet, a reference error value is transmitted in a mode of progressive calculation from the upper level to the lower level so as to calibrate the electric energy measuring system and obtain error-free data or equal error data. In a preferred embodiment, the error reference standard device may be disposed at the middle stage, so that the calibration may be performed from the middle stage to both ends, and the calculation efficiency may be improved, specifically, when the error reference standard device is disposed on the branch of the electric energy metering module of the three-way array structure at the middle stage 1 in and 2 out, the reference error value is transmitted in a manner of calculation from the middle stage to the upper stage and in a manner of calculation from the middle stage to the lower stage, so as to calibrate the electric energy measuring system, and obtain error-free data or equal error data.
For example, a "1" in the electric energy metering module of the three-way array structure with 1 in and 2 out (for which the error value has been calculated) of each lower hierarchy level may be the same line detected by a "2" in the electric energy metering module of another adjacent level (for which the error value has yet to be calculated) of the three-way array structure; similarly, a subset of "2" in the electric energy metering module of the three-way array structure at each upper level (for which the error value has been calculated) may be the same line detected by "1" in the electric energy metering module of the three-way array structure at another lower level (for which the error is yet to be calculated). Therefore, the reference error value is transmitted in a cascading mode, and the calibration is respectively carried out on the electric energy metering modules in the electric energy meter formed by each independent three-way array structure.
When the delta X deviation exists between the real error value and the reference error value of the error reference standard device, the equal error data of each corresponding electric energy metering module is compensated by the delta X deviation, and error-free data are obtained. When the reference error value of the error reference standard device is the same as the real error value of the error reference standard device, calculating to obtain error-free data corresponding to each electric energy metering module directly according to the real error value of the error reference standard device.
The method for sharing the standard refers to the following steps: a reference electric energy metering module with known or unknown error is connected in series with any branch pipeline in 1 electric energy meter with a three-way array structure to be 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 in series to any branch pipeline in the adjacent electric energy meters with 1 three-way array structure through pipeline switching, and the branch pipeline is used as an error reference standard device, so that the electric energy meter error calculation of the adjacent three-way array structure can be completed. By sharing the standard method, the error value transfer between the electric energy meters of 2 independent tee joint array structures can be used.
Specifically, the electric energy measurement system comprises an electric energy meter with a first tee array structure and an electric energy meter with a second tee array structure, wherein the electric energy meter with the first tee array structure and the electric energy meter with the second tee array structure are independent of each other;
the electric energy measuring system also comprises an error reference standard device, the error reference standard device is arranged on a pipeline branch of the electric energy meter with the first three-way array structure, the error reference standard device is also arranged on a pipeline branch of the electric energy meter with the second three-way array structure, and a switch is arranged on the selected pipeline branch; and switching the pipeline branch into which the error reference standard device is connected in series by setting the state of a switch so as to selectively connect the error reference standard device 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.
For example, the corresponding circuit structure design can refer to fig. 4, and the pipeline switching is performed 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 independent from each other, the error reference standard device is connected in series to one of the pipeline branches of the electric energy meter with the first three-way array structure and the electric energy meter with the second three-way array structure, 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 to the electric energy metering module on the selected branch, and a switch K2 is arranged between the error reference standard device and the electric energy metering module 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, a 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-K4 can be switch channels of relays, and the relays control the on-off of the corresponding switches K1-K4.
In practical 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 to the corresponding pipeline of the electric energy meter of the first three-way array structure in series, and the error reference standard device is used as an error reference standard to carry out error checking on the electric energy metering modules in the electric energy meter of the first three-way array structure.
In practical 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 the corresponding pipeline of the electric energy meter of the second three-way array structure, and the error reference standard device is used as an error reference standard to carry out error checking on the electric energy metering modules in the electric energy meter of the second three-way array structure.
In the embodiment, the error calibration of the electric energy meters with the two independent tee-joint array structures can be completed through one error reference standard device, and the normal work of each other is not influenced. In the electric energy meter with the three-way array structure, the method for sharing the standard is similar, and the details are not repeated herein.
Wherein, the standard method of concatenation refers to: the electric energy metering module with known error is connected in series with any branch pipeline in the electric energy meter with the three-way array structure to be used as an error reference standard device, so that the electric energy meter error calculation with the three-way array structure can be completed.
The post correction method comprises the following steps: and selecting 1 branch electric energy metering module in the electric energy meter with the three-way array structure, giving a reference error value to the branch electric energy metering module, 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 selected branch pipelines are taken down from the electric energy meter with the three-way array structure, the real error value of the electric energy metering modules is measured by using a standard experimental method, the deviation delta X between the set reference error value and the real error value can be calculated by using the set reference error value and the real error value, the error of all the electric energy metering modules is corrected by using the deviation, the real error of all the electric energy metering modules can be obtained, and then the original measurement data is corrected, so that error-free data can be obtained.
Further, the electric energy measuring system comprises a microprocessor and a data transmission module, the microprocessor is connected with each electric energy metering module, and the data transmission module is connected with the microprocessor and used for sending the electric energy data collected by the microprocessor from each electric energy metering module to the cloud server.
And the I/O ports with the preset number in the microprocessor are set to be connected with the data transmission ends of the electric energy metering modules with the preset number. The acquisition end of the sub-meter of the electric energy metering module positioned at the last stage is coupled with a user line and/or a user pipeline which are responsible for detection and 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 when the data transmission module is needed, the detection data collected from the electric energy metering modules are sent to the cloud server.
With the combination of the above embodiments, the electric energy measurement system provided by the invention includes at least two stages of electric energy meters with a tee array structure, wherein the electric energy meters with the tee array structure can not only construct electric energy measurement systems of any scale, but also divide the electric energy measurement systems with a larger scale into a plurality of tee array structures with a smaller scale through the electric energy meters with the tee array structure, each tee array structure satisfies the law of relative energy conservation, respectively calculates errors of electric energy metering modules in each tee array structure, weakens multiple collinearity influences faced by electric energy data calculation caused by similar habits of using electric energy by users, and improves calculation efficiency and calculation accuracy.
Example 5:
with reference to the electric energy measurement system in the foregoing embodiment, this embodiment provides a measurement method for an electric energy system formed by a three-way array of the electric energy measurement system, where the electric energy measurement system includes: the electric energy meter with at least two stages of three-way array structures comprises 1 electric energy metering module total meter positioned at an inflow side and 2 electric energy metering module sub meters positioned at an outflow side, wherein the electric energy metering module total meter positioned at the inflow side and the electric energy metering module sub meters positioned at the outflow side form a relative energy conservation relation; the electric energy metering module sub-meter unit positioned on the outflow side in the electric energy meter of the previous-stage three-way array structure is an electric energy metering module main meter positioned on the inflow side of the electric energy meter of the next-stage three-way array structure aiming at the electric energy metering modules of the adjacent two-stage three-way array structure;
referring to fig. 5, the method for measuring the electric energy system formed by the three-way array includes the following steps:
step 10: an error reference standard device is designated or established in the electric energy measurement system and is assigned a reference error value.
In this embodiment, in order to calibrate the raw data, an error reference standard device needs to be set first, and then the raw measurement data needs to be calibrated based on the error reference standard device, so as to eliminate errors and obtain more accurate power data. There are at least several ways to set the error reference standard device.
The first method is as follows: by using a post calibration method, the determining an error reference standard device, specifically, selecting an electric energy metering module in the electric energy measurement system as an error reference standard device, and obtaining a Δ X 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: and removing the selected electric energy metering module from the electric energy measuring system, and measuring the real error value of the selected electric energy metering module.
Referring to fig. 3, the electric energy measurement system includes a large number of electric energy metering modules, wherein each electric energy meter of each stage of the three-way array structure includes 3 electric energy metering modules, wherein 1 electric energy metering module main meter is used for measuring inflow energy, 2 electric energy metering module sub meters are used for measuring branch outflow energy, and the 3 electric energy metering 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.
Aiming at the electric energy meter with each stage of three-way array structure, one electric energy metering module can be selected from any one of the 3 electric energy metering modules as an error reference standard device.
Step 1112: and subtracting the reference error value of the selected electric energy metering module from the real error value of the selected electric energy metering module to obtain the delta X deviation.
In an alternative embodiment, a numerical value is automatically designated as a reference error value according to an actual situation, or a numerical value is selected from a standard measurement error interval as the reference error value. The reference error value may be different from the actual measurement error of the electric energy metering module, and the measurement error of the electric energy metering module cannot be truly reflected. And the difference value between the reference error value of the error reference standard device and the actual error value of the error reference standard device is equal to the Delta X deviation.
The second method comprises the following steps: by using a series standard method, the error reference standard determining device is specifically configured to connect a first electric energy metering module unit with a known real error value in series on a branch where any one electric energy metering module in the electric energy measuring system is located, and then calculate to obtain a reference measurement error of each electric energy metering module in the electric energy measuring system, as shown in fig. 7, the specific electric energy measuring system includes:
step 1121: and respectively reading the electric energy data of the first electric energy metering module unit and the electric energy data of the electric energy metering modules on the branch circuits in the running process of the electric energy measuring system, and calculating the real error value of the electric energy metering modules on the selected branch circuits.
Step 1122: and the electric energy metering module on the selected branch is used as an error reference standard device, and the real error of each electric energy metering module in the electric energy measuring system is calculated by using the calculated real error value of the electric energy metering module on the selected branch.
In the implementation process of the second mode, it is also recommended to set an interface for the first electric energy metering module unit to intervene in a certain branch or multiple branches of the existing electric energy measuring system.
The third method comprises the following steps: by adopting a cascade computing and transferring method, if the electric energy measuring system and the adjacent first electric energy measuring system and/or second electric energy measuring system can construct a relative second electric energy conservation environment, the error reference standard determining device is specifically an electric energy measuring module with a known real error value arbitrarily selected from the first electric energy measuring system and/or the second electric energy measuring system as the error reference standard device; then, the calculating obtains a reference measurement error of each electric energy metering module in the electric energy measurement system, as shown in fig. 8, specifically including:
step 1131: and establishing an energy equation according to the second electric energy conservation environment by using each electric energy metering module in the electric energy measuring system and the adjacent first electric energy measuring system and/or second electric energy measuring system.
Step 1132: and calculating to obtain the real error of each electric energy metering module in the electric energy measuring system according to the real error value of the error reference standard device.
In this embodiment, according to the adjacent electric energy measurement system with the known real error value, the electric energy metering module with the real error value in the adjacent electric energy measurement system may be selected as an error reference standard device, and the reference error value determined according to this method is the real error value (also described as the real error), so that the real error value of each electric energy metering module in the electric energy measurement system to be measured can be calculated and obtained under the condition that a relatively second electric energy conservation environment can be established based on the electric energy measurement system to be measured and the adjacent first electric energy measurement system and/or the adjacent second electric energy measurement system.
In the third mode, when the error reference standard device is set, the measurement error of each electric energy metering module obtained in the following step 12 is the real error value of each electric energy metering module, and after the corresponding original data is calibrated through the real error value, the error-free electric energy data can be obtained. In general, the third of the three ways is the most intelligent, but the specific implementation of the third way also puts higher demands on the architectural relationship, data sharing and computing capability of each electric energy measurement system in the current environment.
The method is as follows: a standard sharing mode is adopted, a known or unknown error reference electric energy metering module is connected in series with any branch pipeline in 1 electric energy meter with a three-way array structure and used as an error reference standard device, and 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 in series to any branch pipeline in the adjacent electric energy meters with 1 three-way array structure through pipeline switching, and the branch pipeline is used as an error reference standard device, so that the electric energy meter error calculation of the adjacent three-way array structure can be completed. By sharing the standard method, the error value transfer between the electric energy meters of 2 independent tee joint array structures can be used.
Specifically, the electric energy measurement system comprises an electric energy meter with a first tee array structure and an electric energy meter with a second tee array structure, wherein the electric energy meter with the first tee array structure and the electric energy meter with the second tee array structure are independent of each other, namely, the electric energy meter with the first tee array structure belongs to one electric energy measurement system, and the electric energy meter with the second tee array structure belongs to the other electric energy measurement system; the electric energy measuring system also comprises an error reference standard device, the error reference standard device is arranged on a pipeline branch of the electric energy meter with the first three-way array structure, the error reference standard device is also arranged on a pipeline branch of the electric energy meter with the second three-way array structure, and a switch is arranged on the selected pipeline branch; and switching the pipeline branch into which the error reference standard device is connected in series by setting the state of a switch so as to selectively connect the error reference standard device 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.
In the embodiment, the error calibration of the electric energy meters with the two independent tee-joint array structures can be completed through one error reference standard device, and the normal work of each other is not influenced.
In other ways, a standard meter may also be incorporated into the power measurement system as an error reference standard. The setting manner of the error reference standard device is selected according to actual conditions, and is not particularly limited herein.
Step 11: and acquiring the original measurement data of the electric energy metering modules on all the input branches and the output branches in the electric energy measurement 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 transmitted to the database server. Wherein, because there is the error in the electric energy metering module, correspondingly, the primitive measured data has the error.
Step 12: and calculating a reference measurement error value of the 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 mode 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 problem of co-linearity caused by the similarity of the user power data may be reduced.
Step 13: and obtaining a three-way array structure which is in a relation with the previous or next electric energy measurement system with the electric energy measurement module which has been calculated to obtain the reference measurement error value, and calculating to obtain the reference measurement error value of the electric energy measurement module in the electric energy meter of the corresponding previous or next three-way array structure 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 times of the previous stage or the next stage so as to obtain the reference measurement error values of all the electric energy metering modules in the electric energy measuring system, and compensating the original measurement data according to the reference measurement error value of each electric energy metering module so as to obtain equal error data or error-free data.
In this embodiment, the reference measurement error value is used to compensate the corresponding original measurement data, 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 a delta X deviation exists between a real error value and a reference error value of the error reference standard device, compensating equal error data of each corresponding electric energy metering module by using the delta X deviation to obtain error-free data; alternatively, the first and second electrodes may be,
and directly calculating to obtain error-free data corresponding to each electric energy metering module according to the real error value of the error reference standard device.
When the error reference standard devices are arranged in different modes, the data calibration mode corresponding to the step 12 also has a difference.
When the error reference standard device is set in the second mode or the standard meter is directly quoted as the error reference standard device, the measurement error of each electric energy metering module in the electric energy measurement 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 to obtain error-free data.
When the error reference standard device is selected in the above manner, the measurement error of each electric energy metering module in the electric energy measurement system is obtained based on the error reference standard device, and the measurement error is the reference measurement error of each electric energy metering module and may not be equal to the true error value. And according to the electric energy measuring system, the compensated electric energy data corresponding to each electric energy metering module is equal error data, and error-free data can be obtained after the equal errors need to be eliminated.
Due to the equal error theory, the real error value of each electric energy metering module minus the reference measurement error is correspondingly equal to the Delta X deviation. Therefore, one electric energy metering module can be selected at will to obtain the real error value of the electric energy metering module so as to obtain the delta X deviation of the electric energy measuring system, and the compensated electric energy data of other electric energy metering modules are calibrated to obtain the error-free electric energy data.
In this embodiment, after the Δ X deviation is obtained, the compensated electric energy data of each electric energy metering module is calibrated according to the Δ X deviation to obtain error-free electric energy data of each electric energy metering module, where the error-free electric energy data is data without error theoretically or data with negligible error.
Example 6:
fig. 9 is a schematic structural diagram of an error calibration apparatus according to an embodiment of the present invention. The error calibration apparatus of the present embodiment includes one or more processors 41 and a memory 42. In fig. 9, one processor 41 is taken as an example.
The processor 41 and the memory 42 may be connected by a bus or other means, and fig. 9 illustrates the connection by a bus as an example.
The memory 42 serves as a storage medium for storing a nonvolatile computer readable, and may be used to store a nonvolatile software program and a nonvolatile computer executable program, such as the measurement methods in embodiments 2 to 5. Processor 41 executes the measurement method by executing non-volatile software programs and instructions stored in memory 42.
The 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, for the information interaction, execution process and other contents between the modules and units in the apparatus and system, the specific contents may refer to the description in the embodiment of the method of the present invention because the same concept is used as the embodiment of the processing method of the present invention, and are not described herein again.
Those of ordinary skill in the art will appreciate that all or part of the steps of the various methods of the embodiments may be implemented by associated hardware as instructed by a program, which may be stored on a computer-readable storage medium, which may include: a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and the like.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (17)
1. An electric energy meter with a three-way array structure is characterized in that an error self-checking circuit consisting of a set of three-way array structure is added in a traditional electric energy meter body to form an electric energy meter with a user's own error checking function.
2. The electric energy meter with the three-way array structure according to claim 1, which comprises 1 household electric energy meter for charging the household and 1 electric energy metering module with the 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 constitutes an electric energy system conforming to the electric energy conservation relation, in the electric energy metering modules corresponding to the electric energy system, a main meter metering module, the electric energy metering module connected in series with the household electric energy meter and the electric energy metering module connected in series with the adjacent household electric energy meter are respectively arranged on the pipelines of 1 main meter and 2 branch meters, and the calculation of the metering errors of the main meter metering module, the electric energy metering module connected in series with the household electric energy meter and the electric energy metering module connected in series with the adjacent household electric energy meter is completed by means of serially connecting error reference standard devices on any pipeline or by means of designating error reference standard devices, specifically, the method comprises the following steps:
establishing a mathematical model by utilizing the electric energy conservation relation of an electric energy system, calculating the electric energy measurement errors of one or more metering modules of a main meter metering module, an electric energy metering module in series connection with a household electric energy meter and an electric energy metering module in series connection with an adjacent user electric energy meter which are respectively arranged on an electric energy measuring system pipeline of the electric energy meter with the three-way array structure through electric energy data detected by an error reference standard device, compensating newly measured electric energy data by utilizing the calculated errors, and continuously and iteratively calculating the measurement errors of the main meter metering module, the electric energy metering module in series connection with the household electric energy meter and the electric energy metering module in series connection with the adjacent user electric energy meter;
and calculating the error of the household electric energy meter for the cost of the user by utilizing the electric energy data of the electric energy metering modules connected in series with 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 charge of the user.
3. The electric energy meter with the three-way array structure according to claim 1, wherein the electric energy meter with the three-way array structure is an alternating current electric energy meter or a direct current electric energy meter.
4. The electric energy meter with the three-way array structure according to claim 2, wherein a connecting terminal for connecting the line of the adjacent user electric energy meter is arranged or reserved on the meter body or the meter case of the electric energy meter with the three-way array structure, so that the line of the adjacent user electric energy meter can be conveniently connected.
5. The electric energy meter with the three-way array structure according to claim 4, wherein the connection terminal of the electric energy meter with the three-way array structure is connected with 1 electric energy metering module of the electric energy meter of the user inside the electric energy meter body of the user, the electric energy metering modules on the lines of the adjacent electric energy meters connected with the connection terminal are in series connection with each other, the electric energy on the same line is measured, and the electric energy data and the errors thereof on the adjacent electric energy metering modules in the electric energy meter body of the user and the adjacent electric energy meters on the same line are read, calculated and analyzed, so that the magnitude transmission of the electric energy data is realized.
6. An electric energy measuring system comprising electric energy meters of a three-way array structure, wherein a plurality of electric energy meters of a three-way array structure according to any one of claims 1 to 5 are connected in pairs in a relationship allowing comparison and transmission of the magnitudes of the electric energy meters, comprising: at least 2 electric energy meters with adjacent three-way array structures are connected with each other, wherein, an electric energy metering module which is connected with the electric energy meter of an adjacent user in the electric energy meter with the 1 st three-way array structure in series is connected with the electric energy metering module which is connected with the electric energy meter of the 2 nd three-way array structure in series, so that the 2 electric energy meters with the adjacent three-way array structures form the series connection relationship and realize the transmission of electric energy values between the electric energy meters through the calculation of related electric energy data.
7. The electric energy measurement system formed by the electric energy meter with the three-way array structure according to claim 6, wherein adjacent users in the electric system to be detected for the electric energy meter error are connected in series through the electric energy meters with the multi-stage three-way array structure to realize electric energy data quantity value transmission, and specifically:
the electric energy metering module in the electric energy meter with the upper three-way array structure and connected with the adjacent user electric energy meter in series is the same as the user line detected by the electric energy metering module in the electric energy meter with the lower three-way array structure and connected with the adjacent user electric energy meter in series for charging the user;
the electric energy metering module in the electric energy meter with the next-stage three-way array structure and connected with the adjacent user electric energy meter in series is the same as the user line detected by the electric energy metering module in the electric energy meter with the next-stage three-way array structure and connected with the adjacent user electric energy meter in series for charging the user;
by analogy, the setting of detecting the same user line exists through the electric energy metering modules in the electric energy meters of the adjacent two-stage three-way array structure, so that the electric energy data series connection is realized; therefore, after the metering error of the electric energy metering module in the electric energy meter with the three-way array structure of any stage is calculated, the data after corresponding metering compensation is used as the known data for calculating the metering error of each electric energy metering module in the electric energy meter with the three-way array structure of the next stage.
8. The electric energy measurement system composed of electric energy meters with a three-way array structure according to claim 6, wherein the electric energy measurement system comprises n electric energy meters with a three-way array structure, wherein every two electric energy meters with a three-way array structure are independent;
the electric energy measuring system also comprises an error reference standard device which is connected in series with any pipeline branch of any three-way array structure electric energy meter of the n three-way array structure electric energy meters.
9. The power measurement system of claim 6, further comprising an error reference standard device connected in series to 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 last-stage three-way array, a reference error value is transmitted in a mode of progressive calculation from a lower level to an upper level so as to calibrate the electric energy measuring system to 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, a reference error value is transmitted in a mode of progressively calculating from the upper level to the lower level so as to calibrate the electric energy measuring system and obtain error-free data or equal error data;
when the error reference standard device is arranged on a branch of the middle-stage three-way array, a reference error value is transmitted in a mode of progressive calculation from the middle stage to the upper stage and in a mode of progressive calculation from the middle stage to the lower stage so as to calibrate the electric energy measuring system and obtain error-free data or equal error data.
10. The electric energy measurement system composed of the electric energy meters with the three-way array structure according to claim 6, wherein the electric energy measurement 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 error edge calculation of the electric energy meters with the three-way array structure and/or is used for sending electric energy data collected from each electric energy metering module to a cloud server.
11. A measuring method of an electric energy measuring system composed of electric energy meters with a three-way array structure is characterized in that the electric energy system composed of the electric energy meters with the three-way array structure comprises the following steps: the electric energy meter with at least two-stage three-way array structure, wherein each stage of three-way array comprises a master meter 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 in series, and the relative electric energy conservation relation is formed by the master meter 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;
aiming at the electric energy meters with two adjacent stages of three-way array structures, the electric energy metering module which is connected with the electric energy meter of the adjacent user in series in the electric energy meter with the upper stage of three-way array structure is the electric energy metering module which is connected with the electric energy meter of the adjacent user in series in the electric energy meter with the lower stage of three-way array structure, so that the adjacent users in the existing electric energy measuring system complete series connection and electric energy data quantity value transmission through the electric energy meters with the multi-stage three-way array structures;
the error checking method comprises the following steps:
an error reference standard device is appointed or established in the electric energy measuring system, and a reference error value is given to the error reference standard device;
acquiring original measurement data of electric energy metering modules of electric energy meters with all three-way array structures in the electric energy measurement system and original measurement data of the error reference standard device;
calculating reference measurement error values of a total meter metering module in the tee array where the error reference standard device is located, an electric energy metering module in series connection with the household electric energy meter and an electric energy metering module in series connection with an adjacent user electric energy meter by using a mathematical model established by a relative electric energy conservation relation aiming at the tee array where the error reference standard device is located;
acquiring an electric energy meter with a tee array structure, which has a previous or next level relation with the electric energy meter with the tee array structure of which the reference measurement error value is calculated, and calculating the reference measurement error values of a total meter metering module in the corresponding previous or next level tee array, an electric energy metering module in series connection with the electric energy meter of the household and an electric energy metering module in series connection with the electric energy meter of the adjacent user 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 meter with the three-way array structure through one or more times of the previous stage or the next stage so as to obtain the reference measurement error values of the electric energy metering modules in the electric energy meters with 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 with each three-way array structure so as to obtain equal error data or error-free data.
12. The method for measuring a power measuring system of a power meter with a three-way array structure according to claim 11, wherein the step of compensating the original measured data according to the reference measurement error value of the power metering module in each power meter with a three-way array structure to obtain equal error data or error-free data comprises:
compensating the 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 a delta X deviation exists between a real error value and a reference error value of the error reference standard device, compensating equal error data of each corresponding electric energy metering module by using the delta X deviation to obtain error-free data; alternatively, the first and second electrodes may be,
and directly calculating to obtain 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.
13. The method according to claim 12, wherein the Δ X deviation between the true error value and the reference error value of the error reference standard device is obtained by:
taking down the selected electric energy metering module 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 real error value of the taken-down electric energy metering module to obtain the delta X deviation.
14. The method for measuring an electric energy measurement system composed of electric energy meters of a three-way array structure according to claim 12, wherein the error reference standard device and the assigned reference error value are determined, specifically:
a first electric energy metering module unit with a known real error value is connected in series with any pipeline branch of any electric energy meter with a three-way array structure of the electric energy measuring system;
in the running process of the electric energy measuring system, respectively reading the electric energy data of the first electric energy measuring module unit and the electric energy data of the electric energy measuring module on the selected branch, and calculating the real error value of the electric energy measuring module on the selected branch;
and the electric energy metering module on the selected branch is used as an error reference standard device, and the real error value of each connected electric energy metering module in the electric energy measuring system is calculated by using the calculated real error value of the electric energy metering module on the selected branch.
15. The method of claim 12, wherein the error is referenced to a reference error value of a standard device, comprising:
in the electric energy measuring system, after an optional electric energy metering module is taken as an error reference standard device, a preset reference error value is matched with a measuring 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 the delta X deviation.
16. The method of claim 12, wherein the method of measuring the electric energy system with the three-way array structure further comprises:
after the original measurement data of the electric energy metering module are collected, determining the similar condition of each original measurement data;
if the similarity of at least two groups of original measurement data is greater than a preset similarity threshold, the measurement error of each electric energy metering module is calculated in a cascade mode in a grading calculation mode 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, the sub-meter electric energy metering module in the last-stage three-way array and the total meter metering module in the uppermost-stage three-way array use the relative electric energy conservation relation to obtain the measurement error of the corresponding electric energy metering module so as to check the original measurement data.
17. The method of claim 11, wherein after the layout of the tee array in the electric energy measurement system and the calculation of the electric energy measurement errors of the electric energy measurement modules respectively arranged on the lines of the electric energy measurement system are completed, the error of the electric energy measurement module in the electric energy system on the corresponding pipeline is continuously and iteratively calculated by using the corrected measurement data of the error in the tee array.
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