CN112557995B

CN112557995B - Ammeter box convenient for checking errors and error checking method

Info

Publication number: CN112557995B
Application number: CN201910914769.7A
Authority: CN
Inventors: 侯飞; 侯铁信; 汪毅; 金鹏
Original assignee: Shenzhen Dianant Data Technology Co ltd
Current assignee: Shenzhen Dianant Data Technology Co ltd
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2023-09-22
Anticipated expiration: 2039-09-26
Also published as: CN112557995A

Abstract

The invention discloses an ammeter box convenient for checking errors and an error checking method, wherein the ammeter box comprises: the system comprises at least two stages of 1-in and n-out electric energy arrays, wherein each stage of 1-in and n-out electric energy array comprises a total table of electric energy sensors positioned on an inlet side and n sub-tables of electric energy sensors positioned on an outlet side, and the total table of the electric energy sensors positioned on the inlet side and the n sub-tables of the electric energy sensors positioned on the outlet side form a relative energy conservation relation; aiming at the adjacent two-stage 1 in and n out electric energy arrays, the electric energy sensor sub-meter positioned at the wire outlet side in the electric energy array of the upper stage 1 in and n out is the electric energy sensor summary meter positioned at the wire inlet side of the electric energy array of the lower stage 1 in and n out. According to the invention, the data calculation scale can be reduced through the 1-in and n-out electric energy array, the multiple collinearity influence on electric energy data calculation caused by the similarity of habits of users using electric energy is weakened, and the calculation efficiency and calculation accuracy are improved.

Description

Ammeter box convenient for checking errors and error checking method

Technical Field

The invention belongs to the technical field of intelligent meter measurement, and particularly relates to an electric meter box convenient for error checking and an error checking method.

Background

At present, a large number of electric energy sensors are used, because the use amount in real life is too large to be detached to a laboratory for detecting electric energy errors. There is a need to find techniques and methods for online detection of these power sensor errors;

the existing ammeter box technology cannot realize the state monitoring misalignment replacement of the ammeter, and the loss caused by the rotation of the traditional ammeter is huge; the on-site verification of errors of the household electric energy meter in the electric meter box is an unsolved technical problem in the world, and is also a sensitive pain point problem of service users of power supply companies.

By utilizing the total table in an electric energy conservation system and the electric energy data of each user electric energy meter, in theory, the error value of each electric energy meter can be obtained by establishing a mathematical model. In actual life, because the electricity utilization habits of users are very similar, the serious problem of multiple collinearity exists between the electric energy data, and the quality of the electric energy data is uneven due to the fact that more electric energy meter data of the users are added, so that the technology and the method for calculating the error of the electric energy meter by using the mathematical method have no practicability.

In view of this, overcoming the drawbacks of the prior art is a problem to be solved in the art.

Disclosure of Invention

Aiming at the defects or improvement demands of the prior art, the invention provides an ammeter box and an error checking method which are convenient for checking errors, and aims to not only construct ammeter boxes of any scale through an electric energy array with 1 in and n out, but also divide the ammeter box with larger scale into a plurality of electric energy arrays with smaller scale through the electric energy array with 1 in and n out, each electric energy array meets the relative energy conservation law, calculates the error of an electric energy sensor in each electric energy array respectively, weakens the multiple collinearity influence on electric energy data calculation caused by the similarity of habit of using electric energy of a user, improves the calculation efficiency and the calculation accuracy, and solves the technical problem of multiple collinearity of the electric energy data.

In order to achieve the above object, according to one aspect of the present invention, there is provided an electric meter box for facilitating error checking, wherein a power supply system with electric energy sensors is constructed in a structure that a plurality of subsystems for facilitating error calculation are combined, the electric meter box comprises a plurality of user electric energy meters and a meter corrector, the meter corrector comprises a plurality of electric energy sensors, and a power supply topology network formed by the plurality of electric energy sensors in the meter corrector and the plurality of user electric energy meters comprises: the system comprises at least two stages of 1-in and n-out electric energy arrays, wherein each stage of 1-in and n-out electric energy array comprises a total table of electric energy sensors positioned at an inlet side and n sub-tables of electric energy sensors positioned at an outlet side, and the total table of the electric energy sensors positioned at the inlet side and the n sub-tables of the electric energy sensors positioned at the outlet side form a relative energy conservation relation;

The electric energy sensor sub-meter positioned on the wire outlet side in the electric energy array of the 1 in/n outlet of the upper stage is a total table of electric energy sensors positioned on the wire inlet side in the electric energy array of the 1 in/n outlet of the lower stage aiming at the electric energy arrays of the 1 in/n outlets of the adjacent two stages;

the user electric energy meter is arranged in the electric energy array of the last stage 1 in and n out, and can also serve as an electric energy sensor sub-meter;

the user electric energy meter is used for collecting electric quantity data of a user and settling electric charge;

the meter calibrating device is used for acquiring the electric quantity data of each electric energy sensor and the electric quantity data of the user electric energy meter so as to detect errors of all the user electric energy meters.

Preferably, the electrical energy sensor comprises any one or more of a voltage sensor, a current sensor, an electrical power sensor and/or an electrical energy sensor.

Preferably, the 1 in/n out electric energy array is a 1 in/2 out electric energy array, and each stage of 1 in/2 out electric energy array comprises a total table of electric energy sensors located on an incoming line side and 2 sub-tables of electric energy sensors located on an outgoing line side, wherein the total table of electric energy sensors located on the incoming line side and the 2 sub-tables of electric energy sensors located on the outgoing line side form a relative energy conservation relationship.

Preferably, the electric meter box further comprises an error reference standard device, wherein the error reference standard device can be connected in series on a branch where any electric energy sensor is located, and an error reference standard device can be additionally arranged on a newly added load branch;

when the error reference standard device is arranged on a branch of the electric energy array of the last stage 1 in and out, transmitting an error reference value in a progressive calculation mode from a lower level to an upper level so as to calibrate an electric meter box, and obtaining error-free data or equal error data;

when the error reference standard device is arranged on a branch of the electric energy array of which the uppermost stage 1 is in and out, transmitting an error reference value in a progressive calculation mode from the upper layer to the lower layer so as to calibrate an electric meter box, and obtaining error-free data or equal error data;

when the error reference standard device is arranged on a branch of the electric energy array from the middle stage 1 to the n, the error reference value is transmitted by a mode of progressive calculation from the middle stage to the upper stage and a mode of progressive calculation from the middle stage to the lower stage, so that the electric meter box is calibrated, and error-free data or error-free data are obtained.

Preferably, the electric meter box comprises a first 1 in-n out electric energy array and a second 1 in-n out electric energy array, wherein the first 1 in-n out electric energy array and the second 1 in-n out electric energy array are respectively in different phases and are mutually independent in electrical connection;

the electric meter box further comprises an error reference standard device, wherein the error reference standard device is arranged on a pipeline branch of the first 1 in/n out electric energy array, and the error reference standard device is also arranged on a pipeline branch of the second 1 in/n out electric energy array, and a switch is arranged on the selected pipeline branch;

and switching a pipeline branch into which the error reference standard device is connected by setting a state of a switch so as to selectively connect the error reference standard device in series to the first 1 in/n out electric energy array or the second 1 in/n out electric energy array.

Preferably, the electric meter box is divided into a first electric meter box and a second electric meter box, the first electric meter box comprises a first 1 in/n out electric energy array, the second electric meter box comprises a second 1 in/n out electric energy array, wherein the first 1 in/n out electric energy array and the second 1 in/n out electric energy array can belong to different phases and can be mutually independent in electrical connection;

the state of the switch is set to switch the pipeline branch into which the error reference standard device is connected in series, so that the error reference standard device is selectively connected in series to the first 1 in/n out electric energy array or the second 1 in/n out electric energy array, and standard error data of the error reference standard device among different ammeter boxes are transmitted.

Preferably, the electricity meter box comprises a microprocessor and a data transmission module, wherein the microprocessor is connected with each electric energy sensor, and the data transmission module is connected with the microprocessor and used for sending electric energy data acquired by the microprocessor from each electric energy sensor to the cloud server.

According to another aspect of the present invention, there is provided an error checking method for an electric meter box, the electric meter box including a plurality of user electric energy meters and a meter calibrator, the meter calibrator including a plurality of electric energy sensors, the electric energy sensors in the meter calibrator and a power supply topology network formed by the plurality of user electric energy meters including: the system comprises at least two stages of 1-in and n-out electric energy arrays, wherein each stage of 1-in and n-out electric energy array comprises a total table of electric energy sensors positioned at an inlet side and n sub-tables of electric energy sensors positioned at an outlet side, and the total table of the electric energy sensors positioned at the inlet side and the n sub-tables of the electric energy sensors positioned at the outlet side form a relative energy conservation relation;

the user electric energy meter is arranged in the electric energy array of the last stage 1 in and n out, and can serve as an electric energy sensor sub-meter;

the error checking method comprises the following steps:

specifying or establishing an error reference standard device in the ammeter box and giving a reference error value to the error reference standard device;

collecting original measurement data of electric energy sensors on all input branches and output branches in the electric meter box and original measurement data of the error reference standard device;

calculating reference measurement error values of all electric energy sensors in the 1-in-n-out electric energy array where the error reference standard device is located by utilizing a relative energy conservation relation aiming at the 1-in-n-out electric energy array where the error reference standard device is located;

acquiring an electric energy array with a relation of the upper stage 1 in and the lower stage 1 out of the electric energy sensor which has been calculated to obtain a reference measurement error value, and calculating to obtain the reference measurement error value of the electric energy sensor in the electric energy array corresponding to the upper stage 1 in and the lower stage 1 in and out of the electric energy array by utilizing the relative energy conservation relation;

And calculating the reference measurement error value process of the electric energy sensors in the 1-in and n-out electric energy array through one or more previous or next stages, so as to obtain the reference measurement error values of all the electric energy sensors in the electric meter box, and compensating the original measurement data according to the reference measurement error value of each electric energy sensor to obtain the equal-error data or error-free data.

Preferably, the compensating the raw measurement data according to the reference measurement error value of each electric energy sensor to obtain the equal error data or the no error data includes:

compensating corresponding original measurement data by using the reference measurement error value to obtain equal error data of the reference error value of each electric energy sensor relative to the error reference standard device; when the delta X deviation exists between the true error value and the reference error value of the error reference standard device, compensating the equal error data of the corresponding electric energy sensors by using the delta X deviation to obtain error-free data; or alternatively, the process may be performed,

and directly calculating error-free data corresponding to each electric energy sensor according to the true error value of the error reference standard device.

Preferably, the Δx deviation between the true error value and the reference error value of the error reference standard device is obtained, in particular:

Taking down the electric energy sensor selected as an error reference standard device, and measuring the real error value of the taken-down electric energy sensor; the actual error value of the removed power sensor is subtracted from the reference error value of the selected power sensor to obtain a DeltaX deviation.

Preferably, the error reference standard means and the assigned reference error value are determined, in particular:

a first electric energy sensor with a known true error value is connected in series on a branch where any electric energy sensor of the electric meter box is located;

in the operation process of the ammeter box, respectively reading the electric energy data of the first electric energy sensor and the electric energy data of the electric energy sensor on the selected branch, and calculating the real error value of the electric energy sensor on the selected branch;

the electric energy sensor on the selected branch is used as an error reference standard device, and the calculated actual error value of the electric energy sensor on the selected branch is used for calculating the actual error of each connected electric energy sensor in the ammeter box.

Preferably, the error reference standard device comprises:

in the ammeter box, after any electric energy sensor is selected as an error reference standard device, a preset reference error value is matched with the measurement error of the error reference standard device, wherein the difference value between the preset reference error value of the error reference standard device and the actual error value of the error reference standard device is equal to DeltaX deviation.

Preferably, the error checking method further includes:

after the original measurement data of the electric energy sensor are collected, determining the similarity condition of each original measurement data;

if the similarity of at least two groups of original measurement data is larger than a preset similarity threshold, adopting a hierarchical calculation mode to calculate measurement errors of each electric energy sensor in a cascading way so as to check the original measurement data;

if the similarity of each group of original measurement data is smaller than a preset similarity threshold value, dividing the electric energy sensors in the electric energy array of the last stage 1 in and n out into a meter and a total table of the electric energy sensors in the electric energy array of the uppermost stage 1 in and n out, and obtaining measurement errors of the corresponding electric energy sensors by utilizing a relative energy conservation relation so as to verify the original measurement data.

In general, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects: the invention provides an ammeter box and an error checking device convenient for checking errors, wherein the ammeter box comprises at least two stages of 1-in and n-out electric energy arrays, the 1-in and n-out electric energy arrays not only can construct ammeter boxes of any scale, but also can divide ammeter boxes of larger scale into a plurality of electric energy arrays of smaller scale through the 1-in and n-out electric energy arrays, each electric energy array meets the relative energy conservation law, the errors of electric energy sensors in each electric energy array are calculated respectively, the multiple collinearity influence on electric energy data calculation caused by the habit similarity of using electric energy of a user is weakened, and the calculation efficiency and calculation accuracy are improved.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings that are required to be used in the embodiments of the present invention will be briefly described below. It is evident that the drawings described below are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a schematic diagram of an electricity meter box for facilitating error checking according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of another electric meter box for facilitating error checking according to an embodiment of the present invention;

FIG. 3 is a schematic circuit diagram of a circuit structure based on a sharing standard according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an electric meter box according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of another embodiment of an electricity meter box;

FIG. 6 is a schematic diagram of an error checking method according to an embodiment of the present invention;

FIG. 7 is a flow chart of a first implementation of step 10 of FIG. 6 according to an embodiment of the present invention;

FIG. 8 is a flow chart of a second implementation of step 10 of FIG. 6 provided by an embodiment of the present invention;

FIG. 9 is a flow chart of a third implementation of step 10 of FIG. 6 provided by an embodiment of the present invention;

FIG. 10 is a schematic diagram of an embodiment of the present invention for providing a power sensor for measuring the deviation of an electricity meter box from a known ΔX;

FIG. 11 is a schematic diagram of an embodiment of the present invention for providing an ammeter box that deviates from another known DeltaX ammeter box;

fig. 12 is a schematic structural diagram of an error calibration device according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

The error reference standard device refers to a standard device used as an error reference standard, so that the error reference standard device is determined in the description, and in a certain sense, electric energy data reported by the error reference standard device is used as an error reference standard for breaking homogeneous equations in the calculation process. Whether using physical experimentation or mathematical calculations, the measurement of any one quantity is relative to a reference datum; any one measurement error is detected relative to an error reference standard, and the etalon or data for the error reference standard is referred to as the error reference standard. For example, a "standard meter" in the experiment of error checking of the conventional electric energy meter is an error reference standard. When the error is calculated by using the electric energy data, the data error of the electric energy sensor used as the reference datum is the error reference standard calculated at this time.

The constant error data according to the present invention is: for any sensor with errors, after the error calibration processing is performed on the original measurement data of the sensor (the original measurement data has errors) by using the detected error value after the measurement error of any sensor with errors is detected, all the errors of the obtained calibrated electric energy data still exist are equal to the errors brought by the error detection method. These calibrated power data are referred to as "equierror" data. The "isoerror" is equal to the error value of the error reference standard itself (also described as Δx deviation in various embodiments of the invention). Under the concept of the same error, after error calibration processing, the measurement error of each piece of electric energy data of the sensing system is the same. The concept of error is an effective theory which is proposed by the inventor after years of research aiming at the field of sensing systems.

The error-free data according to the invention are: for any isoerror data, when its "isoerror" is measured and calibrated, the resulting data is error-free data. In view of the fact that it is theoretically impossible to have absolute error-free data, it is possible in other words that the error-free data is data with no errors or negligible errors.

Example 1:

at present, when the electric meter box scale is large, due to the similarity of the electric energy consumption habits of users, the problem of multiple collinearity of electric energy meter data can be derived, so that the calculation efficiency can be reduced, and the calculation accuracy of the data calculation method is affected. In order to solve the foregoing problems, this embodiment provides an electric meter box convenient for error checking, in practical use, a power supply system with electric energy sensors is configured into a structure of a plurality of subsystems convenient for error calculation, the electric meter box includes a plurality of user electric energy meters and a meter corrector, the meter corrector includes a plurality of electric energy sensors, a power supply topology network formed by a plurality of electric energy sensors in the meter corrector and a plurality of user electric energy meters includes at least two stages of 1 in/out electric energy arrays, wherein the 1 in/out electric energy arrays not only can construct electric meter boxes of any scale, but also can divide the electric meter box of a larger scale into a plurality of electric energy arrays of smaller scale through the 1 in/out electric energy arrays, each electric energy array satisfies the relative energy conservation law, the error of the electric energy sensor in each electric energy array is calculated respectively, and the problem of collinearness of electric energy data can be effectively reduced.

Wherein the plurality of power sensors in each power array conform to the correct network topology. The network topology relationship refers to connection and attribution relationship between an incoming line side electric energy sensor and an outgoing line side electric energy sensor, wherein the concepts of the incoming line side electric energy sensor and the outgoing line side electric energy sensor are relative terms, and the network topology relationship is a relationship between an electric energy summary table and an electric energy sub-meter.

Referring to fig. 1, a schematic structural diagram of an electric meter box of the present embodiment is described, where the electric meter box includes a plurality of user electric energy meters and a meter calibrator, the meter calibrator includes a plurality of electric energy sensors, and a power supply topology network formed by the plurality of electric energy sensors in the meter calibrator and the plurality of user electric energy meters includes: the system comprises at least two stages of 1-in and n-out electric energy arrays, wherein each stage of 1-in and n-out electric energy array comprises a total table of electric energy sensors positioned on an inlet side and n sub-tables of electric energy sensors positioned on an outlet side, and the total table of the electric energy sensors positioned on the inlet side and the n sub-tables of the electric energy sensors positioned on the outlet side form a relative energy conservation relation. Wherein n is a positive integer, and n is not less than 2.

The user electric energy meter is arranged in the electric energy array of the last stage 1 in and n out, and can also serve as an electric energy sensor sub-meter; the user electric energy meter is used for collecting electric quantity data of a user and settling electric charge; the meter calibrating device is used for acquiring the electric quantity data of each electric energy sensor and the electric quantity data of the user electric energy meter so as to detect errors of all the user electric energy meters.

In this embodiment, in terms of the appearance of the product, the meter calibrator and the user electric energy meter are integrated together to form an electric energy meter box with an electric energy meter error checking function. In practical use, the method is generally used in a new power supply area, and can greatly simplify the wiring process (the wiring steps of the meter corrector and the user electric energy meter are simplified, and only the user electric energy meter is required to be connected with a user side power supply system).

The electric energy sensor in the meter corrector is mainly used for collecting the electric quantity data of the corresponding branch, and the user electric energy meter is mainly used for collecting the electric quantity data of the user and displaying the electric quantity data. The electric energy sensor in the meter corrector and the user electric energy meter are mutually matched to form a multistage 1-in n-out electric energy array.

In actual use, the 3 single-phase power systems of the electric meter box are connected into three-phase power systems, and each phase of power system is provided with a 1-in and n-out power array. The three-phase power supply and the power supply and utilization system formed by the user are built in the ammeter box, so that all the ammeter is at least in one 1-minute n array unit, and corresponding 1-minute n array units can be built by using different n values when necessary. The error standard transmission of the interphase electric energy sensors of the three-phase electric energy system in the electric meter box is realized by using 1 electric energy sensor to switch between lines in 2 different single-phase electric energy systems in the three-phase electric energy system in a time sharing manner.

The electric meter box is provided with an interface of a site meter calibration, such as a socket, an open-circuit terminal row, an interlocking contactor or various automatic switching devices, and the like, and is used for stringing an error reference standard device of known electric energy errors into a specified user power circuit of the electric meter box.

Or, a special interface is arranged in the ammeter box, and the adjacent other user lines outside the ammeter box are used for 'passing borrowing' the electric energy sensor with known errors of the specified user circuit of the ammeter box as an error reference standard device of the electric energy sensor. The special interfaces include, but are not limited to, sockets, open-circuit terminal rows, interlocking contactors or various automatic switching devices, and the like.

In addition, the special interface is also used for the electric energy sensor with known errors of other electric meter boxes or adjacent electric users for the designated user line of the electric meter box to be used as an error reference standard device for meter calibration calculation of the electric meter box. The special interfaces include, but are not limited to, sockets, open-circuit terminal rows, interlocking contactors or various automatic switching devices, and the like.

The electric energy sensor meter is characterized in that for the electric energy arrays of the adjacent two stages 1 in and n out, the electric energy sensor meter at the wire outlet side in the electric energy array of the upper stage 1 in and n out is the total table of the electric energy sensors at the wire inlet side of the electric energy array of the lower stage 1 in and n out.

In this embodiment, the upper stage and the lower stage are relative concepts, in which, the uppermost stage of the electric energy sensor and the last stage of the electric energy sensor are removed, and the electric energy sensor located in the middle is an electric energy sensor sub-meter in different electric energy arrays of 1 in and n out, which can be an electric energy array of 1 in and n out from the upper stage or an electric energy array of 1 in and n out from the lower stage, when a certain electric energy sensor is an electric energy array of 1 in and n out from the upper stage; when a certain electric energy sensor belongs to the electric energy array of the next stage 1 in and out, the electric energy sensor is the total table of the electric energy sensors.

Wherein the electrical energy sensor comprises any one or more of a voltage sensor, a current sensor, an electrical power sensor and/or an electrical energy sensor.

The smaller the value of n is, the smaller the computing system corresponding to the electric energy array with 1 in and n out is, and the smaller the influence of multiple collinearity is. In the preferred scheme, the value of n is 2, the 1-in n-out electric energy array is a 1-in 2-out electric energy array, each stage of 1-in 2-out electric energy array comprises a total table of electric energy sensors positioned on an inlet wire side and a sub table of 2 electric energy sensors positioned on an outlet wire side, the total table of the electric energy sensors positioned on the inlet wire side and the sub table of the electric energy sensors positioned on the outlet wire side form a relative energy conservation relation, the 1-in 2-out electric energy array is a minimum system, and the effect of inhibiting multiple collinearity difficult problems is best.

In practical application, the 1 in 2 out electric energy array is the simplest 1 in n out electric energy array with n=2, and is a 1 in 2 out electric energy pipeline system with an electric energy sensor. In theory, a plurality of 1-in and 2-out electric energy arrays can be used to form an electric meter box capable of meeting any customer requirement, the electric energy of the electric meter box can be realized through each 1-in and 2-out electric energy array, and the electric energy sensor can calculate through the 1-in and 2-out electric energy arrays. The greatest technical advantage of the 1 in 2 out power array is that it minimizes the impact of multiple collinearity problems on the power data.

Sometimes, considering the constraint of the number of users and the construction cost of the ammeter box, the scale of the electric energy array unit needs to be increased, and compared with the minimum scale of n=2, the 1-in-n-out electric energy array can sacrifice the inhibiting effect of part of the multiple co-linearity problem; without loss of generality, the following discussion will focus on a 1 in n out power array.

First, the error calculation and compensation for the 1 in and n out power array will be explained.

For an electricity meter box with 1 inflow pipeline and n outflow pipelines, the electric energy accords with the relative energy conservation relation, namely the following formula is satisfied:

wherein w in the foregoing formula ₀ ，x ₀ And w _i ，x _i Representing the total surface of 1 electric energy sensor and the original measurement data and error corresponding to the ith electric energy sensor.

In the foregoing formula, x ₀ And x _i Any one of the data is a known quantity, and the error value of other electric energy sensors can be obtained through calculation by reading the data for not less than n times.

The calculated error value is utilized to compensate the total table of the electric energy sensor and the readings of the sub-table of the electric energy sensor, and electric energy data without errors or equal errors can be obtained:

w′ ₀ ＝w ₀ (1+x ₀ )

w′ _i ＝w _i (1+x _i )

wherein w' ₀ And w' _i The data respectively represent the total table of the compensated electric energy sensor and the electric energy data of the sub-table of the electric energy sensor, and the compensated data also satisfy the relative energy conservation relation:

in the foregoing calculation process, an error reference standard needs to be set, and error-free data or error-free data can be obtained by using the error reference standard, so that error correction is performed on the electric meter box.

The selection or setting of the error reference criteria includes at least the following: a cascading calculation transfer method; a method of sharing criteria; a standard method is connected in series; post-correction methods.

The cascade calculation transfer method refers to the following steps: an electric energy sensor is selected as an error reference standard device on a branch of an electric energy array of a certain stage 1 in and n out, or an error reference standard device is additionally arranged on a newly added load branch, and a reference error value is assigned to the error reference standard device.

Specifically, when the error reference standard device is arranged on a branch of the electric energy array of the last stage 1 in and out, an error reference value is transmitted in a progressive calculation mode from a lower level to an upper level so as to calibrate an electric meter box, and error-free data or equal error data are obtained; when the error reference standard device is arranged on a branch of the electric energy array from the uppermost stage 1 in to n out, the error reference value is transmitted in a progressive calculation mode from the upper layer to the lower layer so as to calibrate the electric meter box, and error-free data or error-free data are obtained. In a preferred embodiment, the error reference standard device may be disposed at an intermediate stage, so that the calibration may be performed from the intermediate stage to two ends, and the calculation efficiency may be improved, specifically, when the error reference standard device is disposed on a branch of the electric energy array of the intermediate stage 1 in and out, the error reference value is transmitted by means of progressive calculation from the intermediate stage to the upper stage and progressive calculation from the intermediate stage to the lower stage, so as to calibrate the electric meter box, and obtain error-free data or error-free data.

For example, "1" in each lower level (for which error values have been calculated) 1 in n out power array may be a fraction of "n" in another upper level (for which errors have yet to be calculated) 1 in n out power array; similarly, a subset of "n" in each upper level (of which the error value has been calculated) 1 in/out power array may be "1" in another lower level (of which the error has yet to be calculated) "1 min n array element". In this way, error reference values are transmitted in a cascading manner, and verification is performed on the electric energy sensors in each independent 1-in and n-out electric energy array.

When the delta X deviation exists between the true error value and the reference error value of the error reference standard device, the delta X deviation is utilized to compensate the equal error data of the corresponding electric energy sensors, and error-free data are obtained. When the reference error value of the error reference standard device is the same as the true error value of the error reference standard device, the error-free data corresponding to each electric energy sensor is obtained directly according to the true error value of the error reference standard device.

The method for sharing the standard refers to the following steps: the electric energy sensor with known or unknown errors is connected into any branch pipeline in the 1-in and n-out electric energy arrays in series, and the branch pipeline is used as an error reference standard device, so that the electric energy sensor error calculation of the electric energy arrays corresponding to the 1-in and n-out electric energy arrays can be completed. Then, the same known or unknown error electric energy sensor is connected into any branch pipeline in the adjacent 1 in/out electric energy arrays in series through pipeline switching, and is used as an error reference standard device, so that the error calculation of the electric energy sensor of the adjacent 1 in/out electric energy arrays can be completed. By sharing the standard approach, the error magnitude transfer between 2 independent 1 in n out power arrays can be used.

Specifically, the electric meter box comprises a first 1 in-n out electric energy array and a second 1 in-n out electric energy array, wherein the first 1 in-n out electric energy array and the second 1 in-n out electric energy array are respectively in different phases and are mutually independent in electrical connection;

the electric meter box further comprises an error reference standard device, wherein the error reference standard device is arranged on a pipeline branch of the first 1 in/n out electric energy array, and the error reference standard device is also arranged on a pipeline branch of the second 1 in/n out electric energy array, and a switch is arranged on the selected pipeline branch; and switching a pipeline branch into which the error reference standard device is connected by setting a state of a switch so as to selectively connect the error reference standard device in series to the first 1 in/n out electric energy array or the second 1 in/n out electric energy array.

For example, referring to fig. 3, the corresponding circuit structure design can be used for switching the pipeline by controlling the on-off of the corresponding switch. As shown in fig. 3, taking the 1 in and 2 out electric energy arrays as an example for explanation, the first 1 in and 2 out electric energy array and the second 1 in and 2 out electric energy array are mutually independent, the error reference standard device is simultaneously connected in series on one pipeline branch of the first 1 in and 2 out electric energy array and the second 1 in and 2 out electric energy array, meanwhile, a switch K1 is arranged on the pipeline branch of the first 1 in and 2 out electric energy array, the switch K1 is connected in parallel with the error reference standard device, the switch K1 and the error reference standard device are connected in series with the electric energy sensor on the selected branch, and a switch K2 is arranged between the error reference standard device and the electric energy sensor on the selected branch; meanwhile, a switch K3 is arranged on a pipeline branch of the second 1-in and 2-out electric energy array, the switch K3 is connected with an error reference standard device in parallel, the switch K3 and the error reference standard device are connected with an electric energy sensor on a selected branch in series, and a switch K4 is arranged between the error reference standard device and the electric energy sensor on the selected branch. The switches K1 to K4 can be specifically switch channels of relays, and the on-off of the corresponding switches K1 to K4 is controlled through the relays.

In actual use, when the switch K1 is set to be in an open state, the switch K2 is set to be in a closed state, the switch K3 is set to be in a closed state, and the switch K4 is set to be in an open state, the error reference standard device is connected in series to a pipeline corresponding to the first 1 in 2 out electric energy array, and is used as an error reference standard to perform error checking on the electric energy sensors in the first 1 in 2 out electric energy array.

In actual use, when the switch K1 is set to be in a closed state, the switch K2 is set to be in an open state, the switch K3 is set to be in an open state, and the switch K4 is set to be in a closed state, the error reference standard device is connected in series to a pipeline corresponding to the second 1 in 2 out electric energy array, and is used as an error reference standard to perform error checking on the electric energy sensors in the second 1 in 2 out electric energy array.

In this embodiment, the error calibration of two independent 1 in and 2 out power arrays can be completed by one error reference standard device, and the normal operation of each other is not affected. In the 1 in and n out power arrays, the method of sharing the standard is similar, and will not be described here again.

The serial standard method refers to the following steps: the electric energy sensor with known error is connected in series with any branch pipeline in the 1 in and n out electric energy array and used as an error reference standard device, so that the electric energy sensor error calculation of the 1 in and n out electric energy array can be completed.

The post-correction method refers to: and selecting 1 branch electric energy sensor in the 1 in and n out electric energy array, giving a reference error value to the branch electric energy sensor, and calculating the error of all the electric energy sensors in the 1 in and n out electric energy array. Taking down any branch pipeline electric energy sensor from the 1 in/out electric energy array, measuring the real error value by using a standard experiment method, calculating the deviation between the set reference error value and the real error value, correcting the errors of all the electric energy sensors by using the deviation, obtaining the real errors of all the electric energy sensors, correcting the original measured data, and obtaining error-free data.

In an actual application scene, the electric meter box is divided into a first electric meter box and a second electric meter box, wherein the first electric meter box comprises a first 1 in-n out electric energy array, the second electric meter box comprises a second 1 in-n out electric energy array, and the first 1 in-n out electric energy array and the second 1 in-n out electric energy array can belong to different phases and can be mutually independent in electrical connection;

Further, the ammeter case includes microprocessor and data transmission module, microprocessor is connected with each electric energy sensor, data transmission module with microprocessor links to each other for send the electric energy data that microprocessor gathered from each electric energy sensor to cloud server.

The preset number of I/O ports in the microprocessor are set to be connected with the data transmission ends of the preset number of electric energy sensors. The acquisition end of the electric energy sensor sub-meter positioned at the last stage is coupled with a user line and/or a user pipeline which are responsible for detection, and is used for feeding back the actual use condition of the corresponding user to the microprocessor; the data transmission module is connected with the microprocessor, and transmits detection data acquired from each electric energy sensor to the cloud server when the detection data are needed.

In combination with the above embodiments, the electric meter box provided by the invention includes at least two stages of 1 in/n out electric energy arrays, wherein the 1 in/n out electric energy arrays not only can construct electric meter boxes of any scale, but also can divide electric meter boxes of larger scale into a plurality of electric energy arrays of smaller scale through the 1 in/n out electric energy arrays, each electric energy array meets the law of relative conservation of energy, the error of an electric energy sensor in each electric energy array is calculated respectively, the multiple collinearity influence of electric energy data calculation caused by the habit similarity of using electric energy of a user is weakened, and the calculation efficiency and calculation precision are improved.

Example 2:

in practical use, the 1 in and n out electric energy array has various application situations, for example, the 1 in and n out electric energy array can be used as an error meter calibrating tool of an electric energy meter, and the 1 in and n out electric energy array is used as an error-free sensor system by calculating errors and compensating errors, so that errors of electric energy sensors connected in series on a pipeline branch of the electric energy sensor system are calibrated; the 1 in and n out electric energy array can be used as a subsystem of a net-shaped electric energy sensor system; the principle design and the manufacturing of the electric energy meter of the electric energy array with 1 in and n out are adopted.

In addition, the electric energy arrays with 1 in and n out can be connected in an expansion mode, and the method for cascading the electric meter box comprises the following steps: by cascading 2 1 in/out electric energy arrays, an electric meter box capable of measuring errors of the electric energy sensors can be constructed, specifically, 1 in the 1 in/out electric energy array of the lower level is connected to the 1 in/out electric energy array of the upper level (error to be calculated) to form a part in n, and the 2 1 in/out electric energy arrays are connected to form 1 new electric meter box, wherein error values of all the electric energy sensors can be calculated.

In addition, the 1 in/n out power array can cope with the sensor burst fault, for example, for (n+1) power sensors in the 1 in/n out power array, if there is the j-th power sensor burst fault, the power measurement function is lost, and the power data w 'of the burst fault power sensor can be obtained by the following formula' _j ：

By the above way, the risk of losing electrical energy data due to the operation of the electrical energy sensor can be avoided.

In this embodiment, the minimum electric meter box can be constructed through the electric energy array with 1 in and n out, so that the electric meter box scale is reduced as much as possible, the multiple collinearity influence of electric energy data calculation caused by the habit similarity of using electric energy by users is weakened, and the error calculation accuracy of the electric energy sensor is improved.

The use of a 1 in 2 out power array in an electricity meter box is illustrated below.

In combination with fig. 4, a product form of an ammeter box is shown, the electric energy sensor can be a sampling resistor specifically, the electricity consumption condition of a user is obtained through the sampling resistor, wherein the sampling resistor (sub-meter) of the electric energy array of the last stage 1 in and 2 out is used for being coupled with a circuit of the user so as to detect the electricity consumption condition of the user, the sampling resistors of the electric energy arrays of other stages 1 in and 2 out are integrated and arranged in a meter corrector, so that a large-scale power supply system is divided into a plurality of small power supply systems, the meter corrector can conduct meter correction in a grading manner when performing meter correction, the data processing capacity of each time is reduced, the calculation efficiency can be improved, and the multiple collinearness influence of electric energy data calculation caused by the habit similarity of using electric energy of the user can be weakened.

In combination with fig. 5, another product form of an electric meter box is shown, the electric energy sensor can be a sampling resistor, and the electricity consumption situation of a user is obtained through the sampling resistor, wherein the sampling resistor (sub-meter) of the electric energy array of the last stage 1 in and 2 out is used for coupling with a circuit of the user so as to detect the electricity consumption situation of the user, the sampling resistors of the electric energy arrays of other stages 1 in and 2 out are integrated and arranged in a meter corrector, in addition, the electric meter box further comprises a user electric meter, and the user electric meter is connected with the sampling resistor positioned at the most terminal so as to display the electricity consumption of the user. Therefore, the large-scale power supply system is divided into a plurality of small power supply systems, when the meter calibrating device is used for calibrating the meter, the meter calibrating can be carried out in a grading manner, the data processing amount of each time is reduced, the calculation efficiency can be improved, and the multiple collinearity influence on the calculation of the electric energy data caused by the habit similarity of using the electric energy of a user can be weakened.

The ammeter case that fig. 5 shows has set up the user ammeter at the user side, and the user ammeter is used for showing the power consumption of user, and the user can learn its power consumption condition through the electric energy display of user ammeter, to a certain extent, provides the convenience for the user. However, currently, the user electric meter is generally disposed at a fixed location of the building, and the user generally cannot see the display of the user electric meter, that is, the display function of the electric meter box in the form of fig. 5 is generally not used, so that the electric meter box illustrated in fig. 4 can be popularized for reducing the cost while guaranteeing the electric energy detection function.

The electric meter box shown in fig. 4 is not provided with a user electric meter on the user side, that is, the electric meter box is not provided with a function of displaying electric energy, when a user needs to acquire the electric energy consumption condition of the user, the electric meter box can be connected with a corresponding cloud server, and the electric energy consumption condition of the user is acquired through a network, so that the component of the user electric meter can be reduced, the installation of the user electric meter can be reduced, and the product cost and the installation cost can be greatly reduced.

Example 3:

in combination with the electric meter box of the foregoing embodiment, the present embodiment provides an error checking method of an electric meter box, where the electric meter box includes a plurality of user electric energy meters and a meter calibrator, the meter calibrator includes a plurality of electric energy sensors, and a power supply topology network formed by the plurality of electric energy sensors in the meter calibrator and the plurality of user electric energy meters includes: the system comprises at least two stages of 1-in and n-out electric energy arrays, wherein each stage of 1-in and n-out electric energy array comprises a total table of electric energy sensors positioned at an inlet side and n sub-tables of electric energy sensors positioned at an outlet side, and the total table of the electric energy sensors positioned at the inlet side and the n sub-tables of the electric energy sensors positioned at the outlet side form a relative energy conservation relation; the electric energy sensor sub-meter positioned on the wire outlet side in the electric energy array of the 1 in/n outlet of the upper stage is a total table of electric energy sensors positioned on the wire inlet side in the electric energy array of the 1 in/n outlet of the lower stage aiming at the electric energy arrays of the 1 in/n outlets of the adjacent two stages; the user electric energy meter is arranged in the electric energy array of the last stage 1 in and n out, and can serve as an electric energy sensor sub-meter.

Referring to fig. 6, the error checking method includes the steps of:

step 10: an error reference standard is specified or established in the meter box and a reference error value is assigned thereto.

In this embodiment, in order to calibrate the original data, an error reference standard device is set first, and then the original measurement data is calibrated based on the error reference standard device, so as to eliminate errors and obtain more accurate electric energy data. There are at least the following ways of setting up the error reference standard means.

Mode one: by adopting a post calibration method, the determining an error reference standard device, specifically, selecting an electric energy sensor in the electric meter box as the error reference standard device, obtaining a Δx deviation between an actual error value of the error reference standard device and the reference error value, as shown in fig. 7, specifically includes:

step 1111: the selected power sensor is removed from the meter box and the actual error value of the selected power sensor is measured.

Referring to fig. 1, the electric meter box includes a plurality of electric energy sensors, wherein, for each stage 1 in/out electric energy array, each electric energy array includes (n+1) electric energy sensors, wherein, a total table of electric energy sensors is used for measuring incoming line energy, and n sub tables of electric energy sensors are used for measuring branching energy, and (n+1) electric energy sensors form a correct network topology relationship, and whether the network topology relationship is correct or not can be determined according to a correlation method.

For the power array of each stage 1 in and n out, one power sensor can be selected from any one of the (n+1) power sensors to serve as an error reference standard device.

Step 1112: subtracting the reference error value of the selected power sensor from the actual error value of the selected power sensor to obtain the DeltaX deviation.

In an alternative embodiment, a numerical value is self-specified as an error specified value according to actual conditions, or a numerical value can be selected from a standard measurement error interval as the specified value. The specified value may be in and out of the true measurement error of the power sensor, and may not truly reflect the measurement error of the power sensor. The difference between the error appointed value of the error reference standard device and the true error value of the error reference standard device is equal to the DeltaX deviation.

Mode two: the serial standard method is adopted, the device for determining the error reference standard is specifically that a first electric energy sensor with a known actual error value is connected in series on a branch where any electric energy sensor in the electric meter box is located, and then the reference measurement error of each electric energy sensor in the electric meter box is obtained through calculation, as shown in fig. 8, the specific electric meter box comprises:

Step 1121: and in the operation process of the ammeter box, respectively reading the electric energy data of the first electric energy sensor and the electric energy data of the electric energy sensor on the branch, and calculating the actual error value of the electric energy sensor on the selected branch.

Step 1122: and the electric energy sensor on the selected branch is used as an error reference standard device, and the calculated actual error value of the electric energy sensor on the selected branch is used for calculating the actual error of each electric energy sensor in the electric meter box.

Compared with the first mode, the second mode is more suitable for the example scene of the specific application, but in the implementation process of the second mode, an interface for accessing the first electric energy sensor is also recommended to be arranged in a certain branch or a plurality of branches of the existing electric meter box.

Mode three: adopting a cascade calculation transmission method, wherein the electric meter box and the adjacent first electric meter box and/or second electric meter box can construct a relative second electric energy conservation environment, and determining an error reference standard device, namely arbitrarily selecting an electric energy sensor with a known actual error value from the first electric meter box and/or the second electric meter box as the error reference standard device; the calculating obtains a reference measurement error of each electric energy sensor in the electric meter box, as shown in fig. 9, specifically including:

Step 1131: and establishing an energy equation according to the second energy conservation environment by using the electric meter box and each electric energy sensor in the adjacent first electric meter box and/or second electric meter box.

Referring to fig. 10, the electric meter box to be calibrated includes a multi-stage 1 in/n out electric energy array, the first electric meter box also includes a multi-stage 1 in/n out electric energy array, the electric meter box to be calibrated and the first electric meter box are simultaneously affiliated to an electric meter box Y (wherein, the electric meter box Y can be understood as a second electric meter box which is usually observed from a larger range of electric meter boxes), an electric energy sensor 0 positioned at the uppermost stage in the electric meter box to be calibrated and an electric energy sensor 0 'positioned at the uppermost stage in the first standard electric meter box form a topological relation between a total table and a sub table together with an electric energy sensor m in the electric meter box Y, and an electric energy sensor (for example, an electric energy sensor n') with a known actual error in the first electric meter box can be selected as an error reference standard device. Correspondingly, the relationship among the first meter box, the meter box Y and the meter box may also be as shown in fig. 11, that is, the first meter box may be represented as a single electric energy sensor 1'.

Step 1132: and calculating the actual error of each electric energy sensor in the electric meter box according to the actual error value of the error reference standard device.

In this embodiment, the electric energy sensors having actual error values in the adjacent electric meter boxes may be selected as error reference standard devices according to the adjacent electric meter boxes having known actual error values, where the reference error value determined according to this method is an actual error value (also described as a true error), so that the actual error value of each electric energy sensor in the electric meter box to be measured may be calculated under a condition that a relative second electric energy conservation environment can be constructed based on the electric meter box to be measured and the adjacent first electric meter box and/or second electric meter box.

In the third mode, when the error reference standard device is set, the measurement error of each electric energy sensor obtained according to the following step 12 is the actual error value of each electric energy sensor, and after the corresponding original data is calibrated through the actual error value, error-free electric energy data can be obtained. In general, the third mode is the most intelligent mode, but the specific implementation of the third mode also puts higher demands on the architecture relation, the sharing of data and the computing capacity of each ammeter box in the current environment.

Mode four: by adopting a standard sharing mode, an electric energy sensor with known or unknown error is connected into any branch pipeline in the 1-in and n-out electric energy arrays in series and used as an error reference standard device, and the electric energy sensor error calculation corresponding to the 1-in and n-out electric energy arrays can be completed. Then, the same known or unknown error electric energy sensor is connected into any branch pipeline in the adjacent 1 in/out electric energy arrays in series through pipeline switching, and is used as an error reference standard device, so that the error calculation of the electric energy sensor of the adjacent 1 in/out electric energy arrays can be completed. By sharing the standard approach, the error magnitude transfer between 2 independent 1 in n out power arrays can be used.

Specifically, the electric meter box comprises a first 1 in-n out electric energy array and a second 1 in-n out electric energy array, wherein the first 1 in-n out electric energy array and the second 1 in-n out electric energy array are mutually independent, namely, the first 1 in-n out electric energy array is subordinate to one electric meter box, and the second 1 in-n out electric energy array is subordinate to the other electric meter box; the electric meter box further comprises an error reference standard device, wherein the error reference standard device is arranged on a pipeline branch of the first 1 in/n out electric energy array, and the error reference standard device is also arranged on a pipeline branch of the second 1 in/n out electric energy array, and a switch is arranged on the selected pipeline branch; and switching a pipeline branch into which the error reference standard device is connected by setting a state of a switch so as to selectively connect the error reference standard device in series to the first 1 in/n out electric energy array or the second 1 in/n out electric energy array.

In this embodiment, the error calibration of two mutually independent 1 in/n out power arrays can be completed by one error reference standard device, and the normal operation of each other is not affected.

In other ways, a standard table can also be introduced into the meter box, which standard table serves as an error reference standard. The arrangement of the error reference standard device is selected according to the actual situation, and is not particularly limited here.

Step 11: and acquiring the original measurement data of the electric energy sensors on all input branches and output branches in the electric meter box and the original measurement data of the error reference standard device.

In this embodiment, the raw measurement data of the individual power sensors may be automatically collected by the concentrator and transferred to the database server. Wherein, because of errors in the electrical energy sensor, correspondingly, the original measurement data has errors.

Step 12: and calculating a reference measurement error value of an electric energy sensor in the 1-in and n-out electric energy array where the error reference standard device is positioned by utilizing a relative energy conservation relation aiming at the 1-in and n-out electric energy array where the error reference standard device is positioned.

In this embodiment, a cascade progressive calculation manner may be adopted to transfer the reference error value, so that the scale of data calculation may be reduced, the calculation efficiency may be improved, and the co-linearity problem caused by the similarity of the user electric energy data may be reduced.

Step 13: and acquiring an electric energy array with the upper-stage or lower-stage 1 in-n out relation with the electric energy sensor which has been calculated to obtain the reference measurement error value, and calculating to obtain the reference measurement error value of the electric energy sensor in the electric energy array corresponding to the upper-stage or lower-stage 1 in-n out by utilizing the relative energy conservation relation.

Step 14: and calculating the reference measurement error value process of the electric energy sensors in the 1-in and n-out electric energy array through one or more previous or next stages, so as to obtain the reference measurement error values of all the electric energy sensors in the electric meter box, and compensating the original measurement data according to the reference measurement error value of each electric energy sensor to obtain the equal-error data or error-free data.

In the embodiment, the corresponding original measurement data is compensated by using the reference measurement error value to obtain the equal error data of the reference error value of each electric energy sensor relative to the error reference standard device; when the delta X deviation exists between the true error value and the reference error value of the error reference standard device, compensating the equal error data of the corresponding electric energy sensors by using the delta X deviation to obtain error-free data; or alternatively, the process may be performed,

In the embodiment of the invention, in order to improve the accuracy of calculation, the parameter variable of the line loss can also be used, however, in order to consider the indirection of the description, the parameter variable of the line loss is not introduced in the following detailed description process. Specifically, the following method may be adopted to obtain the measurement error of each electric energy sensor. Here, an electric power sensor will be described as an example of an electric power device.

For a power supply system with m power supply lines and n power consuming users, the meter box contains at least (m+n) power sensors, and the power (power data) flowing through the meter box accords with the relative power conservation law, namely: sum of input electrical energy = sum of consumer electrical energy.

In this embodiment, a relative conservation relation of electric energy is established according to a first formula, wherein the first formula is specifically:

wherein W is _i Raw measurement data of the electric energy sensor representing the ith incoming line, X _i Representing the measurement error of the electric energy sensor of the ith incoming line; w (W) _j Raw measurement data of the electric energy sensor representing the jth line, X _j Indicating the measurement error of the power sensor of the j-th wire. The meaning of the relative conservation of electric energy is that electric energy is, for example: the line losses between the power sensors are typically included in the errors of the power sensors, thereby forming a relative conservation of power equation.

And substituting the original measurement data corresponding to the error reference standard device, the reference error value corresponding to the error reference standard device and the original measurement data of other electric energy sensors into a formula I to obtain the measurement error of each electric energy sensor.

After each electric energy sensor is compensated by adopting the reference measurement error, the error between the obtained compensated electric energy data and the real electric energy data is equal to the delta X deviation (i.e. equal deviation). That is, (m+n) pieces of power data at any one time point given by the electric meter box have the same error. The Δx deviation is an equal error, which is the error of the error reference standard itself in the error measurement method. This means that the error reference standard means are checked for an equal error using any method, i.e. the error values of the remaining (m+n-1) data are known, resulting in a true value of the power value (error free data).

Therefore, when the setting modes of the error reference standard device are different, the data calibration modes corresponding to step 12 are also different.

When the error reference standard device is set in the second mode or the standard table is directly referenced as the error reference standard device, the measurement error of each electric energy sensor in the electric meter box is obtained based on the error reference standard device, the measurement error is the actual error value of each electric energy sensor, and then the corresponding original measurement data is calibrated based on the actual error value of each electric energy sensor, so that error-free data are obtained.

When the error reference standard device is selected in the foregoing manner, the measurement error of each electric energy sensor in the electric meter box is obtained based on the error reference standard device, where the measurement error is a reference measurement error of each electric energy sensor, and may not be equal to an actual error value. And calibrating the original measurement data according to the reference measurement errors to obtain compensated electric energy data, wherein the compensated electric energy data corresponding to each electric energy sensor is equal error data aiming at the ammeter box, and error-free data can be obtained after the equal errors are required to be eliminated.

Due to the equal error theory, the actual error value of each electric energy sensor minus the reference measurement error thereof corresponds to the Δx deviation. Therefore, an electric energy sensor can be selected at will to acquire an actual error value thereof so as to acquire the delta X deviation of the ammeter box, and thus the compensated electric energy data of other electric energy sensors are calibrated to acquire error-free electric energy data.

In this embodiment, after the Δx deviation is obtained, the compensated electric energy data of each electric energy sensor is calibrated according to the Δx deviation, so as to obtain error-free electric energy data of each electric energy sensor, where the error-free electric energy data is data that has no errors in theory or data that has negligible errors.

Example 4:

in an actual application scenario, the embodiment divides a large-scale ammeter box into a plurality of 1-in and n-out electric energy arrays, which is mainly used for reducing the co-linearity problem caused by the similarity of electric energy data of users. When the similarity problem does not exist in the electric energy data of the user, the error of each electric energy sensor can be calculated directly in a traditional mode so as to verify the original measured data, another alternative scheme is provided based on the actual use condition of the user, and the processor can select any mode according to the actual data scale to perform calculation, so that the flexibility of calculation is improved.

Specifically, the implementation manner of this embodiment is as follows:

after the original measurement data of the electric energy sensor are collected, the similarity condition of each original measurement data is determined, for example, the similarity condition of each original measurement data can be determined by drawing a curve or a histogram, wherein if two groups of original measurement data are basically equal, the similarity of the two groups of original measurement data is extremely high, and the problem of collinearity is possibly caused; if the two groups of original measurement data are not basically equal, the original measurement data are not high in similarity, and the problem of collinearity is basically not caused.

In the actual calculation process, if there are at least two groups of raw measurement data with similarity greater than the preset similarity threshold, a hierarchical calculation mode is adopted to calculate measurement errors of each electric energy sensor in cascade, so as to verify the raw measurement data (i.e. the mode corresponding to the embodiment 3).

If the similarity of each group of original measurement data is smaller than a preset similarity threshold value, dividing the electric energy sensors in the electric energy array of the last stage 1 in and n out into a meter and a total table of the electric energy sensors in the electric energy array of the uppermost stage 1 in and n out, and obtaining measurement errors of the corresponding electric energy sensors by utilizing a relative energy conservation relation so as to verify the original measurement data. The method comprises the steps of directly establishing an energy conservation formula between a total table of the electric energy sensors in the electric energy array at the inlet and the outlet of the uppermost stage 1 and a sub table of the electric energy sensors in the electric energy array at the inlet and the outlet of the last stage 1, and determining errors of the corresponding electric energy sensors so as to calibrate original measurement data.

In this way, the error reference standard device generally selects, as the error reference standard device, the electric energy sensor sub-meter located in the electric energy array located in the last stage 1 in and out, or selects, as the error reference standard device, the electric energy sensor sub-meter located in the electric energy array located in the last stage 1 in and out. And then, compensating the original measurement data according to the same error compensation method to obtain error-free data.

Example 5:

fig. 12 is a schematic structural diagram of an error calibration device according to an embodiment of the present invention. The error calibration device of the present embodiment includes one or more processors 41 and a memory 42. In fig. 12, a processor 41 is taken as an example.

The processor 41 and the memory 42 may be connected by a bus or otherwise, which is illustrated in fig. 12 as a bus connection.

The memory 42, as a nonvolatile computer-readable storage medium for storing one error calibration method, can be used to store nonvolatile software programs and nonvolatile computer-executable programs, such as the error calibration methods in embodiments 1 to 6. The processor 41 performs the error calibration method by running non-volatile software programs and instructions stored in the memory 42.

Memory 42 may include high-speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, memory 42 may optionally include memory located remotely from processor 41, which may be connected to processor 41 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

It should be noted that, because the content of information interaction and execution process between modules and units in the above-mentioned device and system is based on the same concept as the processing method embodiment of the present invention, specific content may be referred to the description in the method embodiment of the present invention, and will not be repeated here.

Those of ordinary skill in the art will appreciate that all or a portion of the steps in the various methods of the embodiments may be implemented by a program that instructs associated hardware, the program may be stored on a computer readable storage medium, the storage medium may include: read Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk, optical disk, or the like.

It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims

1. The utility model provides a ammeter case convenient to check error, its characterized in that constructs the power supply system who has the current sensor into the structure that a plurality of subsystems that are convenient for calculate error sum, ammeter case includes a plurality of user's electric energy meters and school table ware, user's electric energy meter with school table ware is integrated together, including a plurality of current sensor in the school table ware, include in the power supply topology network that a plurality of current sensor in the school table ware and a plurality of user's ammeter formed: the system comprises at least two stages of 1 in and 2 out electric energy arrays, wherein each stage of 1 in and 2 out electric energy array comprises a current sensor total surface positioned on an incoming line side and 2 current sensor sub-meters positioned on an outgoing line side, and the current sensor total surface positioned on the incoming line side and the 2 current sensor sub-meters positioned on the outgoing line side form a relative energy conservation relation;

The current sensor sub-meter positioned on the wire outlet side in the adjacent two-stage 1-in 2-out electric energy arrays in the upper-stage 1-in 2-out electric energy array is a current sensor summary meter positioned on the wire inlet side in the next-stage 1-in 2-out electric energy array;

the user electric energy meter is arranged in the electric energy array of the last stage 1 in and 2 out, and can also serve as a current sensor sub-meter;

the meter calibrating device is used for acquiring the electric quantity data of each current sensor and the electric quantity data of the user electric energy meter so as to detect errors of all the user electric energy meters;

the error checking method comprises the following steps:

collecting original measurement data of current sensors on all input branches and output branches in the ammeter box and original measurement data of the error reference standard device;

calculating reference measurement error values of all current sensors in the 1-in 2-out electric energy array where the error reference standard device is located by utilizing a relative energy conservation relation aiming at the 1-in 2-out electric energy array where the error reference standard device is located;

Acquiring an electric energy array with a previous stage or next stage 1-in-2-out relation with the current sensor with the reference measurement error value calculated, and calculating the reference measurement error value of the current sensor in the electric energy array with the corresponding previous stage or next stage 1-in-2-out relation by utilizing the relative energy conservation relation;

and calculating the reference measurement error value process of the current sensors in the 1-in and 2-out electric energy array through one or more previous or next stages, so as to obtain the reference measurement error values of all the current sensors in the electric meter box, and compensating the original measurement data according to the reference measurement error value of each current sensor to obtain the equal-error data or error-free data.

2. The meter box of claim 1, wherein the 1 in 2 out electrical energy array is a 1 in 2 out electrical energy array, each stage of the 1 in 2 out electrical energy array comprises a current sensor summary meter on an incoming line side and 2 current sensor sub-meters on an outgoing line side, and a current sensor summary meter on the incoming line side and 2 current sensor sub-meters on the outgoing line side form a relative energy conservation relationship.

3. The meter box of claim 1, further comprising an error reference standard device connected in series with a branch where any current sensor is located, or by adding an error reference standard device to a newly added load branch;

When the error reference standard device is arranged on a branch of the electric energy array from the last stage 1 in to 2 out, transmitting an error reference value in a progressive calculation mode from a lower level to an upper level so as to calibrate an electric meter box, and obtaining error-free data or equal error data;

when the error reference standard device is arranged on a branch of the electric energy array of which the uppermost stage 1 is in and out of the electric energy array, transmitting an error reference value in a progressive calculation mode from the upper layer to the lower layer so as to calibrate the electric meter box, and obtaining error-free data or equal error data;

when the error reference standard device is arranged on a branch of the electric energy array from the middle stage 1 to 2, the error reference value is transmitted by a mode of progressive calculation from the middle stage to the upper stage and a mode of progressive calculation from the middle stage to the lower stage, so that the electric meter box is calibrated, and error-free data or error-free data are obtained.

4. The electrical meter box of claim 1, comprising a first 1 in 2 out electrical energy array and a second 1 in 2 out electrical energy array, wherein the first 1 in 2 out electrical energy array and the second 1 in 2 out electrical energy array are in different phases and are independent of each other in electrical contact;

The electric meter box further comprises an error reference standard device, wherein the error reference standard device is arranged on a pipeline branch of the first 1-in and 2-out electric energy array, and the error reference standard device is also arranged on a pipeline branch of the second 1-in and 2-out electric energy array, and a switch is arranged on the selected pipeline branch;

and switching a pipeline branch into which the error reference standard device is connected by setting a state of a switch so as to selectively connect the error reference standard device in series to the first 1-in 2-out electric energy array or the second 1-in 2-out electric energy array.

5. The meter box of claim 1, wherein the meter box is divided into a first meter box and a second meter box, the first meter box comprises a first 1 in 2 out electrical energy array, the second meter box comprises a second 1 in 2 out electrical energy array, wherein the first 1 in 2 out electrical energy array and the second 1 in 2 out electrical energy array are in different phases, or the first 1 in 2 out electrical energy array and the second 1 in 2 out electrical energy array are independent of each other in electrical connection;

The state of the switch is set to switch the pipeline branch into which the error reference standard device is connected in series, so that the error reference standard device is selectively connected in series to the first 1-in-2-out electric energy array or the second 1-in-2-out electric energy array, and standard error data of the error reference standard device among different ammeter boxes are transmitted.

6. The electricity meter box of claim 1, wherein the electricity meter box comprises a microprocessor connected to each of the current sensors and a data transmission module connected to the microprocessor for transmitting the electrical energy data collected by the microprocessor from each of the current sensors to the cloud server.

7. The error checking method for the electric meter box is characterized in that the electric meter box comprises a plurality of user electric energy meters and a meter corrector, the meter corrector comprises a plurality of current sensors, and a power supply topology network formed by the plurality of current sensors in the meter corrector and the plurality of user electric energy meters comprises the following steps: the system comprises at least two stages of 1 in and 2 out electric energy arrays, wherein each stage of 1 in and 2 out electric energy array comprises a current sensor total surface positioned on an incoming line side and 2 current sensor sub-meters positioned on an outgoing line side, and the current sensor total surface positioned on the incoming line side and the 2 current sensor sub-meters positioned on the outgoing line side form a relative energy conservation relation;

the user electric energy meter is arranged in the electric energy array of the last stage 1 in and 2 out, and can serve as a current sensor sub-meter;

the error checking method comprises the following steps:

8. The method of claim 7, wherein compensating the raw measurement data based on the reference measurement error value of each current sensor to obtain the constant error data or the error-free data comprises:

compensating corresponding original measurement data by using the reference measurement error value to obtain equal error data of the reference error value of each current sensor relative to the error reference standard device; when the delta X deviation exists between the true error value and the reference error value of the error reference standard device, compensating the equal error data of the corresponding current sensors by using the delta X deviation to obtain error-free data; or alternatively, the process may be performed,

and directly calculating error-free data corresponding to each current sensor according to the true error value of the error reference standard device.

9. The error checking method according to claim 8, wherein the Δx deviation between the true error value and the reference error value of the error reference standard device is obtained, in particular:

removing the current sensor selected as the error reference standard device, and measuring the true error value of the removed current sensor; the actual error value of the removed current sensor is subtracted from the reference error value of the selected current sensor to obtain a DeltaX deviation.

10. The error checking method according to claim 8, characterized in that the error reference standard means and the assigned reference error value are determined, in particular:

a first current sensor with a known true error value is connected in series on a branch where any current sensor of the ammeter box is located;

in the operation process of the ammeter box, respectively reading the electric energy data of the first current sensor and the electric energy data of the current sensor on the selected branch, and calculating the real error value of the current sensor on the selected branch;

the current sensor on the selected branch is used as an error reference standard device, and the calculated true error value of the current sensor on the selected branch is used for calculating the true error of each connected current sensor in the ammeter box.

11. The error checking method of claim 8, wherein the reference error value of the error reference standard means comprises:

in an ammeter box, after any selected current sensor is used as an error reference standard device, a preset reference error value is matched with a measurement error of the error reference standard device, wherein the difference value between the preset reference error value of the error reference standard device and an actual error value of the error reference standard device is equal to DeltaX deviation.

12. The error checking method according to claim 8, characterized in that the error checking method further comprises:

after the original measurement data of the current sensor are collected, determining the similarity condition of each original measurement data;

if the similarity of at least two groups of original measurement data is larger than a preset similarity threshold, adopting a hierarchical calculation mode to calculate measurement errors of all current sensors in a cascading way so as to verify the original measurement data;

if the similarity of each group of original measurement data is smaller than a preset similarity threshold value, dividing the current sensors in the electric energy array at the last stage 1 in and 2 out into a meter and a total table of the current sensors in the electric energy array at the uppermost stage 1 in and 2 out, and obtaining measurement errors of the corresponding current sensors by utilizing a relative energy conservation relationship so as to verify the original measurement data.