CN112557999A

CN112557999A - Multi-user electric energy meter and error checking method convenient for error checking

Info

Publication number: CN112557999A
Application number: CN201910914797.9A
Authority: CN
Inventors: 侯飞; 侯铁信; 汪毅; 金鹏
Original assignee: Wuhan National Survey Data Technology Co ltd
Current assignee: Shenzhen Dianant Data Technology Co ltd
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2021-03-26
Anticipated expiration: 2039-09-26
Also published as: CN112557999B

Abstract

The invention discloses a multi-user electric energy meter convenient for error checking and an error checking method, wherein the electric energy meter comprises the following components: the electric energy arrays at least comprise two stages of 1 in-out electric energy arrays, wherein each stage of 1 in-out electric energy array comprises an electric energy sensor general meter positioned at an incoming line side and n electric energy sensor sub meters positioned at an outgoing line side, and the electric energy sensor general meter positioned at the incoming line side and the n electric energy sensor sub meters positioned at the outgoing line side form a relative energy conservation relation; the electric energy sensor branch meter positioned on the outgoing line side in the electric energy array which is fed in and n out at the previous stage 1 is an electric energy sensor general meter positioned on the incoming line side of the electric energy array which is fed in and n out at the next stage 1. In the invention, the multi-user electric energy meter with real-time error calculation and detection can be designed and manufactured by the 1 in/n out electric energy array, the 1 in/n out electric energy array can reduce the data calculation scale, and the multiple collinearity influence on electric energy data calculation caused by the regularity and similarity of the habit of using electric energy by a user can be weakened.

Description

Multi-user electric energy meter and error checking method convenient for error checking

Technical Field

The invention belongs to the technical field of intelligent meter measurement, and particularly relates to a multi-user electric energy meter and an error checking method convenient for error checking.

Background

At present, a large amount of electric energy meters used cannot be disassembled into laboratory detection electric energy errors due to too large use amount in real life. Technologies and methods for online detection of errors of these electric energy meters are urgently needed;

for mathematical algorithms, when the power utilization system is large, the electric energy meters contained in the power utilization system are many, the multiple collinearity problem of the electric energy meter data can be derived due to the similarity of the electric energy consumption habits of users, and the calculation accuracy of the data calculation method is influenced.

Conventionally, an electric energy meter secondary meter is installed on a pipeline or a node of an electric energy meter to be measured, or an error detection device is temporarily installed additionally, electric energy of each point is measured, and a measurement error of each user electric energy meter is verified respectively when needed. The method has the problems of huge workload and high cost of error checking of the electric energy meter.

In view of the above, overcoming the drawbacks of the prior art is an urgent problem in the art.

Disclosure of Invention

Aiming at the defects or the improvement requirements of the prior art, the invention provides a multi-user electric energy meter and an error checking method convenient for error checking, and aims to construct an electric energy meter of any scale through an electric energy array with 1 in and n out, divide an electric energy meter system with a large electric user scale into a plurality of electric energy arrays with small scales through the electric energy array with 1 in and n out, meet a relative energy conservation law for each electric energy array, respectively calculate the error of an electric energy sensor in each electric energy array, weaken the multiple collinearity influence on 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.

To achieve the above object, according to one aspect of the present invention, there is provided a multi-user electric energy meter facilitating error checking, in which a power supply system of a pipeline with electric energy sensors is constructed in a structure in which a plurality of subsystems facilitating error calculation are aggregated, including: the electric energy array comprises at least two stages of 1 in-out electric energy arrays, wherein each stage of 1 in-out electric energy array comprises an electric energy sensor total meter positioned on an incoming line side and n electric energy sensor sub meters positioned on an outgoing line side, and the electric energy sensor total meter positioned on the incoming line side and the n electric energy sensor sub meters positioned on the outgoing line side form a relative energy conservation relation;

the electric energy sensor sub-meter positioned on the outgoing line side in the electric energy array which is fed in and out at the previous stage 1 is an electric energy sensor general meter positioned on the incoming line side in the electric energy array which is fed in and out at the next stage 1, aiming at the electric energy arrays which are fed in and out at the two adjacent stages 1;

the electric energy sensor general meter in the electric energy array at the top 1 in n out is used for being connected with a power supply line, and the electric energy sensor sub meter in the electric energy array at the last 1 in n out is used for being connected with different loads of a plurality of user terminals and used as an independent electric energy meter for a plurality of users.

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

In the 1 in and n out electric energy array, the electric energy sensor general meter positioned at the wire inlet side can be a three-phase electric energy meter with three-phase wire inlet, and the corresponding multi-user electric energy meter at the wire outlet side can be a three-phase electric energy meter with three-phase wire outlet or a single-phase electric energy meter with single-phase wire outlet; or, the electric energy sensor general meter positioned at the incoming line side can be a single-phase electric energy meter with a single-phase power supply, and the corresponding multi-user electric energy meter at the outgoing line side is a single-phase electric energy meter with a single-phase outgoing line.

Preferably, the 1 in n out electric energy array is a 1 in 2 out electric energy array, and the electric energy meter comprises a first-stage 1 in 2 out electric energy array;

the electric energy sensor general meter positioned on the incoming line side is used as an electric energy meter of 1 user and is used for being connected with the incoming line of a power supply, and the electric energy sensor branch meters positioned on the outgoing line side are connected in series in two paths of loads on the user side; or the like, or, alternatively,

the electric energy sensor general meter positioned on the incoming line side is used as an electric energy meter general meter of 1 user and is used for being connected with a power incoming line, and the electric energy sensor sub-meters positioned on the outgoing line side are connected in series on power supply branches of 2 user sides and are used as electric energy meters of 2 users.

Preferably, the multi-user electric energy meter further comprises an interface provided with an error reference standard device, and the error reference standard device is connected in series on a branch of the multi-user electric energy meter where a designated electric energy sensor is located through the interface;

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

when the error reference standard device is arranged on a branch of the electric energy array which is at the top level 1 and enters or exits n, an error reference value is transmitted in a mode of progressively calculating from the upper level to the lower level so as to calibrate the electric energy meter and obtain error-free data or equal error data;

when the error reference standard device is arranged on a branch of the electric energy array which is input into or output from the middle stage 1, an error reference 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 that the electric energy meter is calibrated to obtain error-free data or equal error data.

Preferably, the incoming line power supply of the multi-user electric energy meter is three-phase power, the interior of the multi-user electric energy meter 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 operate on different phases and are mutually independent in electrical connection;

the electric energy meter also comprises an error reference standard device, the error reference standard device is arranged on a pipeline branch of the first 1 in n out electric energy array, 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 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 first 1 in n out electric energy array or the second 1 in n out electric energy array, thereby realizing the inter-phase transmission of the known error values of the error reference standard device.

Preferably, the multi-user electric energy meter is divided into a first multi-user electric energy meter and a second multi-user electric energy meter, the first multi-user electric energy meter comprises a first 1 in n out electric energy array, the second multi-user electric energy meter 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 be different phases and can be independent from each other in electrical connection;

the multi-user electric energy meter further comprises an error reference standard device, the error reference standard device is arranged on a pipeline branch of the first 1 in n out electric energy array, 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 the pipeline branch into which the error reference standard device is connected in series is switched by setting the 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, so that the standard error data of the error reference standard device between different multi-user electric energy meters can be transmitted.

Preferably, the multi-user electric energy meter comprises a microprocessor and a data transmission module, 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 collected 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 a multi-user electric energy meter, the electric energy meter including: the electric energy array comprises at least two stages of 1 in-out electric energy arrays, wherein each stage of 1 in-out electric energy array comprises an electric energy sensor total meter positioned on an incoming line side and n electric energy sensor sub meters positioned on an outgoing line side, and the electric energy sensor total meter positioned on the incoming line side and the n electric energy sensor sub meters positioned on the outgoing line side form a relative energy conservation relation;

the electric energy sensor main meter in the electric energy array at the top stage 1 inlet n outlet is used for being connected with an inlet wire of a power supply, and the electric energy sensor sub meter in the electric energy array at the last stage 1 inlet n outlet is used for being connected with different loads of a plurality of users at a user side;

the error checking method comprises the following steps:

an error reference standard device is additionally arranged in the multi-user electric energy meter interface and is endowed with a reference error value;

acquiring original measurement data of electric energy sensors on all input branches and all output branches in the multi-user electric energy meter and original measurement data of the error reference standard device;

calculating a reference measurement error value of the electric energy sensor in the electric energy array with 1 in and n out of which the error reference standard device is positioned by utilizing a relative energy conservation relation aiming at the electric energy array with 1 in and n out of which the error reference standard device is positioned;

acquiring an electric energy array which is in an in-n-out relation with an electric energy sensor which is calculated to obtain a reference measurement error value at the previous stage or the next stage 1, and calculating to obtain the reference measurement error value of the electric energy sensor in the electric energy array corresponding to the in-n-out relation of the previous stage or the next stage 1 by utilizing a relative energy conservation relation;

and calculating the reference measurement error values of the electric energy sensors in the electric energy array with 1 in and n out through one or more times of the previous stage or the next stage, thereby obtaining the reference measurement error values of all the electric energy sensors in the multi-user electric energy meter, 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 the error-free data of all the user electric energy meters.

Preferably, the compensating the raw measurement data according to the reference measurement error value of each electric energy sensor to obtain equal error data or 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 sensor relative to the error reference standard device; when 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 sensor by utilizing 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 sensor according to the real error value of the error reference standard device.

Preferably, the Δ X deviation between the real error value and the reference error value of the error reference standard device is obtained by:

taking down the selected electric energy sensor as an error reference standard device, and measuring the real error value of the taken-down electric energy sensor; and subtracting the reference error value of the selected power sensor from the real error value of the taken power sensor to obtain the delta X 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 real error value is connected in series with an interface additionally arranged on a branch circuit where an appointed electric energy sensor of the multi-user electric energy meter is positioned;

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 in the operation process of the multi-user electric energy meter, and calculating the real error value of the electric energy sensor on the selected branch;

and the electric energy sensor on the selected branch is used as an error reference standard device, and the real error of each connected electric energy sensor in the electric energy meter is calculated by using the calculated real error value of the electric energy sensor on the selected branch.

Preferably, the error is referenced to a reference error value of a standard device, including:

in the multi-user electric energy meter, after any electric energy sensor is selected as an error reference standard device, a preset reference error value is matched with a measurement error of the error reference standard device, wherein the difference value between the preset reference error value of the error reference standard device and an actual error value of the error reference standard device is equal to delta X deviation.

Preferably, the error checking method further includes:

after the original measurement data of the electric energy sensor 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 errors of the electric energy sensors are 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 sensors in the electric energy array at the last stage 1 in and n out are divided into sub-meters, and the electric energy sensors in the electric energy array at the top stage 1 in and n out are summed up to obtain the measurement errors of the corresponding electric energy sensors by utilizing the relative energy conservation relation, so as to check the original measurement data.

Generally, compared with the prior art, the technical scheme of the invention has the following beneficial effects: the invention provides an electric energy meter and an error checking device convenient for error checking, the electric energy meter provided by the invention comprises at least two stages of 1 in n out electric energy arrays, wherein the 1 in n out electric energy arrays can not only construct electric energy meters of any scale, but also design and manufacture multi-user electric energy meters with real-time error calculation and detection and the 1 in n out electric energy arrays, the electric energy meters with larger scale can be divided into a plurality of electric energy arrays with smaller scale through the 1 in n out electric energy arrays, each electric energy array meets the relative energy conservation law, errors of electric energy sensors in each electric energy array are respectively calculated, the multiple collinearity influence of electric energy data calculation caused by the regularity and similarity of electric energy use habits of users is 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 a multi-user electric energy meter convenient for error checking according to an embodiment of the present invention;

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

FIG. 3 is a schematic 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 structural diagram of another electricity meter box provided by the embodiment of the invention;

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

FIG. 7 is a flowchart illustrating a first implementation manner of step 10 in FIG. 6 according to an embodiment of the present invention;

fig. 8 is a schematic flow chart of a second implementation manner of step 10 in fig. 6 according to an embodiment of the present invention;

fig. 9 is a schematic flowchart of a third implementation manner of step 10 in fig. 6 according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of an electric energy meter and an electric energy sensor with a known Δ X deviation according to an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of an electric energy meter according to an embodiment of the present invention, which is offset from another known Δ X;

fig. 12 is a schematic structural diagram of an error calibration 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 sensor 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 sensor with errors, after the measurement error of the sensor is detected, the detected error value is used for carrying out error calibration processing on the original measurement data (the original measurement data has errors) of the sensor, and the errors of all the obtained calibrated electric energy data are equal to the errors caused by the detection error 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:

at present, when the electric energy meter is large in scale, due to the similarity of electric energy consumption habits of users, the problem of multiple collinearity of electric energy meter data can be derived, the calculation efficiency can be reduced, and the calculation accuracy of the data calculation method is influenced. In practical use, the power supply system of the pipeline with the electric energy sensor is constructed into a structure of a plurality of subsystems which are convenient for error calculation, the electric energy meter comprises at least two stages of 1 in and n out electric energy arrays, wherein the 1 in and n out electric energy arrays can not only construct electric energy meters of any scale, but also divide electric energy meters with larger scale into a plurality of electric energy arrays with smaller scale through the 1 in and n out electric energy arrays, each electric energy array meets the law of relative energy conservation, errors of the electric energy sensor in each electric energy array are calculated respectively, and the multiple collinearity problem of electric energy data can be effectively reduced.

Wherein the plurality of power sensors for each power array conform to a correct network topology relationship. The network topology relation refers to the connection and the affiliation relation between the incoming line side electric energy sensor and the 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 relatively speaking, and the concepts of the incoming line side electric energy sensor and the outgoing line side electric energy sensor are a relation between an electric energy general meter and an electric energy branch meter.

With reference to fig. 1, a schematic structural diagram of the multi-user electric energy meter of the present embodiment is illustrated, where the multi-user electric energy meter includes: the electric energy array comprises at least two stages of 1 in-out electric energy arrays, wherein each stage of 1 in-out electric energy array comprises an electric energy sensor main meter positioned on an incoming line side and n electric energy sensor sub meters positioned on an outgoing line side, and the electric energy sensor main meter positioned on the incoming line side and the n electric energy sensor sub meters positioned on the outgoing line side form a relative energy conservation relation. Wherein n is a positive integer and n is more than or equal to 2.

The electric energy sensor sub-meter positioned on the outgoing line side in the electric energy array which is fed in and out at the previous stage 1 is an electric energy sensor general meter positioned on the incoming line side in the electric energy array which is fed in and out at the next stage 1, aiming at the electric energy arrays which are fed in and out at the two adjacent stages 1; the electric energy sensor general meter in the electric energy array at the top 1 in n out is used for being connected with a power supply line, and the electric energy sensor sub meter in the electric energy array at the last 1 in n out is used for being connected with different loads of a plurality of user terminals and used as an independent electric energy meter for a plurality of users.

In practical use, the electric energy meter is connected with the cloud service end or the processing end to upload data acquired by each electric energy sensor, and the cloud service end or the processing end can perform data compensation according to the error checking method of the following embodiments to obtain data without errors or the like.

In this embodiment, the upper stage and the lower stage are relative concepts, wherein the electric energy sensor excluding the electric energy sensor at the uppermost stage and the electric energy sensor at the last stage, and the electric energy sensor located in the middle, among different electric energy arrays with 1 in and n out, may be dependent on the electric energy array with 1 in and n out at the upper stage, or dependent on the electric energy array with 1 in and n out at the lower stage, and when a certain electric energy sensor is dependent on the electric energy array with 1 in and n out at the upper stage, the electric energy sensor is an electric energy sensor sub-meter; when a certain electric energy sensor belongs to the electric energy array which enters and exits from the next stage 1, the electric energy sensor is an electric energy sensor general meter.

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

The smaller the value of n is, the smaller the computing system corresponding to the electric energy array with 1 input and n output is, and the smaller the multiple collinearity influence is. In a 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 level of the 1-in-2-out electric energy array comprises an electric energy sensor total meter positioned on an incoming line side and 2 electric energy sensor branch meters positioned on an outgoing line side, the electric energy sensor total meter positioned on the incoming line side and the electric energy sensor branch meters positioned on the outgoing line 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 problems is the best.

In a practical application scenario, the simplest electric energy meter can be designed based on a 1-in 2-out electric energy array, namely, the multi-user electric energy meter comprises a first-stage 1-in 2-out electric energy array, electric energy metering chips and current and voltage sensors are respectively arranged on an inlet wire and an outlet wire, the electric energy of the inlet wire and the outlet wire conforms to the electric energy conservation relation, measurement error values of a master meter and a branch meter can be obtained through electric energy data calculation, and the master meter and the branch meter can be compensated by utilizing the error values to enable the error to be close to 0 error.

In actual use, the electric energy meter can be used for measuring the electricity utilization condition of a single user, the electric energy sensor main meter positioned on the incoming line side is used as the electric energy meter of 1 user and is used for being connected with the incoming line of a root power supply, and the 2 electric energy sensor branch meters positioned on the outgoing line side are connected in series in two paths of loads on the user side.

In other use, the electric energy meter can be used for measuring the electricity utilization conditions of two different users, compared with the application, the difference exists in the wiring mode, the wiring mode is correspondingly adjusted, the electric energy sensor main meter positioned at the incoming line side is used as the electric energy meter main meter of 1 user and is used for being connected with a power supply incoming line, and the electric energy sensor branch meters positioned at the outgoing line side are connected in series on the power supply branch circuits of 2 user sides and are used as the electric energy meters of 2 users.

In a practical application scenario, the 1-in-2-out power array is the simplest 1-in-n-out power array with n being 2, and is a 1-in-2-out power pipeline system with a power sensor. Theoretically, an electric energy meter which can meet the requirements of any customer can be formed by using a plurality of 1-in 2-out electric energy arrays, the electric energy of the electric energy meter can be realized by each 1-in 2-out electric energy array, and the electric energy sensor can calculate through the 1-in 2-out electric energy array. The greatest technical advantage of a 1 in 2 out power array is that it minimizes the effects of multiple collinearity problems with power data.

Sometimes, considering the constraints of the number of users and the construction cost of the electric energy meter, the scale of the electric energy array unit needs to be increased, and compared with the minimum scale of n being 2, the suppression effect of part of multiple collinearity problems is sacrificed when the electric energy array is fed in and fed out by 1; without loss of generality, the 1 in n out power array is taken as a subject of discussion below.

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

For a 1 inflow pipeline and n outflow pipelines electric energy meter, the electric energy meets the relative energy conservation relation, namely the following formula is satisfied:

wherein w is in the above formula₀，x₀And w_i，x_iAnd respectively representing the original measurement data and the error of the 1 electric energy sensor summary table corresponding to the ith electric energy sensor.

In the foregoing formula, x₀And x_iThe error value of other electric energy sensors can be obtained by reading the data for not less than n times through calculation when any one of the electric energy sensors is a known quantity.

The calculated error values are used for compensating the readings of the electric energy sensor general meter and the electric energy sensor sub-meter, so that electric energy data without errors or the like can be obtained:

w′₀＝w₀(1+x₀)

w′_i＝w_i(1+x_i)

wherein, w'₀And w'_iRespectively representing the electric energy data of the compensated electric energy sensor general meter and the electric energy sensor sub-meter, wherein the compensated data also meet the relative energy conservation relation:

in the 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 the error correction is performed on the electric energy meter.

The multi-user electric energy meter further comprises an interface additionally provided with an error reference standard device, and the error reference standard device is connected in series on a branch of the multi-user electric energy meter where a designated electric energy sensor is located through the interface to detect errors.

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: and selecting an electric energy sensor on a branch of the electric energy array which enters or exits from a certain stage 1 as an error reference standard device, and endowing a reference error value for the error reference standard device.

Specifically, when the error reference standard device is arranged on a branch of the electric energy array which is input and output at the last stage 1, the error reference value is transmitted in a mode of calculation from the lower stage to the upper stage, so that the electric energy meter is calibrated to obtain error-free data or equal error data; when the error reference standard device is arranged on a branch of the electric energy array which is at the top level 1 and goes in and out of n, an error reference value is transmitted in a mode of calculation from the upper level to the lower level, so that the electric energy meter is calibrated, and error-free data or equal error data are obtained. 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 power array at the middle stage 1, the error reference value is transmitted by a manner of calculation from the middle stage to the upper stage, and by a manner of calculation from the middle stage to the lower stage, so as to calibrate the power meter, and obtain error-free data or equal error data.

For example, a "1" in a 1 in n out power array of each lower level (for which an error value has been calculated) may be a subset of a "n" in another 1 in n out power array of an upper level (for which an error has yet to be calculated); similarly, a subset of "n" in the power array of 1 in n out of each upper level (for which the error value has been calculated) may be "1" in "1 n array unit" of another lower level (for which the error value has yet to be calculated). In this way, the error reference value is transferred in a cascading manner, and the electric energy sensors in each independent 1-in-n-out electric energy array are checked respectively.

When delta X deviation exists between the real error value and the reference error value of the error reference standard device, the delta X deviation is used for compensating the equal error data of each corresponding electric energy sensor to obtain error-free data. 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 sensor directly according to the real error value of the error reference standard device.

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

Specifically, the incoming line power supply of the multi-user electric energy meter is three-phase power, the interior of the multi-user electric energy meter 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 operate on different phases and are mutually independent in electrical connection;

the electric energy meter also comprises an error reference standard device, the error reference standard device is arranged on a pipeline branch of the first 1 in n out electric energy array, 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 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 first 1 in n out electric energy array or the second 1 in n out electric energy array, thereby realizing the inter-phase transmission of the known error values of the error reference standard device.

For example, the corresponding circuit structure design can refer to fig. 3, and the pipeline switching is performed by controlling the on/off of the corresponding switch. As shown in fig. 3, taking the 1 in 2 out power array as an example for explanation, the first 1 in 2 out power array and the second 1 in 2 out power array are independent from each other, the error reference standard device is connected in series to one of the pipeline branches of the first 1 in 2 out power array and the second 1 in 2 out power array, a switch K1 is arranged on the pipeline branch of the first 1 in 2 out power array, a switch K1 is connected in parallel to the error reference standard device, a switch K1 and the error reference standard device are both connected in series to the power sensor on the selected branch, and a switch K2 is arranged between the error reference standard device and the power sensor on the selected branch; meanwhile, a switch K3 is arranged on a pipeline branch of the second 1 inlet and 2 outlet electric energy array, 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 sensor on the 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-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 in series to the corresponding pipeline of the first 1 in 2 out electric energy array, and the error reference standard device is used for carrying out error checking on the electric energy sensors in the first 1 in 2 out electric energy array.

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 to the corresponding pipeline of the second 1 in 2 out electric energy array in series, and the error reference standard device is used as an error reference standard to carry out error checking on the electric energy sensors in the second 1 in 2 out electric energy array.

In the embodiment, the error calibration of two independent 1-in 2-out power arrays can be completed through one error reference standard device, and the normal work of each other is not influenced. In the 1 in/n out power array, the method of sharing the standard is similar, and will not be described herein.

Wherein, the standard method of concatenation refers to: the electric energy sensor with known error is connected in series with any branch pipeline in the electric energy array with 1 inlet and n outlets to be used as an error reference standard device, and the electric energy sensor error calculation of the electric energy array with 1 inlet and n outlets can be completed.

The post correction method comprises the following steps: and selecting 1 branch electric energy sensor in the 1 in-out and n-out electric energy array, giving a reference error value to the selected branch electric energy sensor, and calculating the errors of all the electric energy sensors of the 1 in-out and n-out electric energy array. Any branch pipeline electric energy sensor is taken down from the electric energy array with the 1 in/n out, the real error value of the electric energy sensor is measured by using a standard experimental method, the deviation 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 sensors is corrected by using the deviation, the real error of all the electric energy sensors can be obtained, and then the original measurement data is corrected, so that error-free data can be obtained.

In practical use, the multi-user electric energy meter is divided into a first multi-user electric energy meter and a second multi-user electric energy meter, the first multi-user electric energy meter comprises a first 1 in n out electric energy array, the second multi-user electric energy meter 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 be different phases and can be independent from each other in electrical connection;

Further, the multi-user electric energy meter comprises a microprocessor and a data transmission module, 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 collected by the microprocessor from each electric energy sensor 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 sensors with the preset number. The acquisition end of the sub-meter of the electric energy sensor 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 sends detection data acquired from the electric energy sensors to the cloud server when necessary.

With the combination of the above embodiments, the electric energy meter provided by the invention includes at least two stages of electric energy arrays with 1 in and n out, wherein the electric energy array with 1 in and n out can not only construct an electric energy meter with any scale, but also divide an electric energy meter with a large scale into a plurality of electric energy arrays with a small scale through the electric energy array with 1 in and n out, each electric energy array satisfies the law of relative energy conservation, respectively calculates the error of the electric energy sensor in each electric energy array, weakens the multiple collinearity influence faced by calculation of electric energy data caused by similar habits of using electric energy by users, and improves the calculation efficiency and the calculation accuracy.

In addition, when error calibration is performed, an error out-of-limit alarm may be set, and specifically, the judgment may be performed according to the following formula:

in the foregoing formula w₀，x₀And w_i，x_iRespectively representing the original measurement data and the error corresponding to the 1 electric energy sensor general meter and the ith electric energy sensor sub-meter, and C is an alarm threshold value.

When the electric quantity difference value between the general meter and the sub-meter is larger than the threshold value C, error out-of-limit warning is carried out, which indicates that the error of the electric energy sensor is larger and needs to be corrected, and the correction can be carried out according to the following error correction method.

Example 2:

in practical use, the 1 in/n out electric energy array has multiple application scenarios, for example, the 1 in/n out electric energy array can be used as an error correction tool of an electric energy meter, and the 1 in/n out electric energy array is used as an error-free sensor system to check errors of electric energy sensors connected in series on a pipeline branch thereof by using calculation errors and error compensation; the 1-in n-out electric energy array can be used as a subsystem of a mesh electric energy sensor system; the electric energy meter is designed and manufactured by adopting the principle of 1 in and n out electric energy array.

In addition, the electric energy arrays with 1 inlet and n outlets can be connected in an expanding way, and the method for cascading expanding the electric energy meters comprises the following steps: the electric energy meter capable of measuring errors of the electric energy sensors can be constructed by cascading 2 electric energy arrays with 1 in and n out, specifically, 1 in the electric energy array with 1 in and n out of the lower level is connected to the electric energy array with 1 in and n out of the upper level (the error is yet to be calculated) to become a sub-group of n, and 2 electric energy arrays with 1 in and n out are connected to form 1 new electric energy meter, wherein the error values of all the electric energy sensors can be obtained through calculation.

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

By the aid of the mode, the risk that the electric energy data are lost due to work of the electric energy sensor can be avoided.

In this embodiment, a minimum electric energy meter can be constructed through the electric energy array with 1 in and n out, the scale of the electric energy meter is reduced as much as possible, multiple collinearity influences of electric energy data calculation caused by similar habits of using electric energy by users are 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 electric meter box is exemplified below.

With reference to fig. 4, a product form of an electricity meter box is shown, an electric energy sensor can be specifically a sampling resistor, the electricity utilization condition of a user is obtained through the sampling resistor, wherein the sampling resistor (sub-meter) of an electric energy array of last stage 1 in 2 out is used for being coupled with a line of the user, the electricity utilization condition of the user is detected, the sampling resistors of the electric energy array of other stage 1 in 2 out are all integrated and arranged in a meter calibrating device, a large-scale power supply system is divided into a plurality of small power supply systems, the meter calibrating device can calibrate the meter in a grading manner when calibrating the meter, the data processing amount of each time is reduced, the calculation efficiency can be improved, and multiple collinearity influences faced by calculation of electric energy data caused by habitual similarity of electric energy used by 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 specifically a sampling resistor, the electricity utilization 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 line of the user, the electricity utilization condition of the user is detected, the sampling resistors of the electric energy array of the other stage 1 in and 2 out are all integrally arranged in a meter calibrating device, in addition, the electric meter box further comprises a user electric meter, and the user electric meter is connected with the sampling resistor located at the most end, so that the electricity utilization of the user is displayed. So divide large-scale power supply system into a plurality of little power supply systems, the school table ware can carry out the school table in grades when carrying out the school table, has reduced the data handling volume at every turn, can promote computational efficiency, moreover, can weaken the multiple collinearity influence that the custom similarity that the user used the electric energy caused electric energy data to calculate to face.

The ammeter case that figure 5 demonstrates has set up the user ammeter in user's side, and the user ammeter is used for showing user's power consumption ability, and the user can learn its power consumption ability condition through the electric energy display of user ammeter, and to a certain extent, provides the convenience for the user. However, at present, the user electric meter is generally arranged at a fixed position of a 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, and the electric meter box shown in fig. 4 can be popularized to reduce the cost while the electric energy detection function is ensured.

Wherein, the ammeter case that figure 4 demonstrates does not set up the user's ammeter in user's side, promptly, does not have for being used for providing the function that shows the electric energy, when the user need acquire its power consumption circumstances, can establish connection with corresponding cloud server, acquires its power consumption circumstances through the network, so, can reduce this part of user's ammeter, also can reduce the installation of user's ammeter moreover, can reduce product cost and installation cost greatly.

Example 3:

with reference to the electric energy meter of the foregoing embodiment, this embodiment provides an error checking method for a multi-user electric energy meter, where the multi-user electric energy meter includes: the electric energy array comprises at least two stages of 1 in-out electric energy arrays, wherein each stage of 1 in-out electric energy array comprises an electric energy sensor total meter positioned on an incoming line side and n electric energy sensor sub meters positioned on an outgoing line side, and the electric energy sensor total meter positioned on the incoming line side and the n electric energy sensor sub meters positioned on the outgoing line side form a relative energy conservation relation; the electric energy sensor sub-meter positioned on the outgoing line side in the electric energy array which is fed in and out at the previous stage 1 is an electric energy sensor general meter positioned on the incoming line side in the electric energy array which is fed in and out at the next stage 1, aiming at the electric energy arrays which are fed in and out at the two adjacent stages 1;

the electric energy sensor main meter in the electric energy array at the top 1 inlet n outlet is used for being connected with an inlet wire of a power supply, and the electric energy sensor sub meter in the electric energy array at the last 1 inlet n outlet is used for being connected with different loads of a plurality of users at a user side.

In this embodiment, when performing error calibration, an error out-of-limit alarm may be set, and specifically, the determination may be performed according to the following formula:

In this embodiment, the error may be predicted as above, and when the error exceeds the preset threshold C, the error checking method shown in fig. 6 is executed.

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

step 10: and an error reference standard device is additionally arranged in the multi-user electric energy meter interface and is endowed with 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 sensor in the electric energy meter as the error reference standard device, and obtaining a Δ X 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 power meter and an actual error value of the selected power sensor is measured.

Referring to fig. 1, the electric energy meter includes a large number of electric energy sensors, where each stage of 1 input and n output electric energy arrays includes (n +1) electric energy sensors, where one electric energy sensor general meter is used to measure input line energy, n electric energy sensor sub meters are used to measure branch line energy, and the (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 n-in and n-out electric energy array of each stage 1, one electric energy sensor can be selected from the (n +1) electric energy sensors to be used 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 Δ X offset.

In an alternative embodiment, a numerical value is automatically designated as the error designated value according to an actual situation, or a numerical value is selected from a standard measurement error interval as the designated value. The specified value may be different from the actual measurement error of the electric energy sensor, and the measurement error of the electric energy sensor cannot be truly reflected. And the difference value of the error designated value of the error reference standard device and the 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, specifically, a first electric energy sensor with a known actual error value is connected in series to an interface additionally installed on a branch where an electric energy sensor designated by a multi-user electric energy meter is located, and then the reference measurement error of each electric energy sensor in the electric energy meter is obtained through calculation, as shown in fig. 8, the specific electric energy meter includes:

step 1121: and respectively reading the electric energy data of the first electric energy sensor and the electric energy data of the electric energy sensors on the branches in the running process of the multi-user electric energy meter, and calculating the actual error value of the electric energy sensor on the selected branch.

Step 1122: and the electric energy sensors on the selected branch are used as error reference standard devices, and the real error of each electric energy sensor in the electric energy meter is calculated by using the calculated actual error value of the electric energy sensors on the selected branch.

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 the first electric energy sensor to be intervened is also recommended to be arranged in a certain branch or a plurality of branches of the existing electric energy meter.

The third method comprises the following steps: by adopting a cascade computing and transmitting method, if the electric energy meter and an adjacent first electric energy meter and/or second electric energy meter can construct a relative second electric energy conservation environment, the error reference standard device is determined, specifically, an electric energy sensor with a known actual error value is selected from the first electric energy meter and/or the second electric energy meter as the error reference standard device; then, the calculating to obtain the reference measurement error of each electric energy sensor in the electric energy meter, as shown in fig. 9, specifically includes:

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

Referring to fig. 10, the electric energy meter to be calibrated includes a multi-stage 1 in n out electric energy array, the first electric energy meter also includes a multi-stage 1 in n out electric energy array, the electric energy meter to be calibrated and the first electric energy meter belong to the electric energy meter Y (wherein, the electric energy meter Y can be understood as a second electric energy meter, usually observed from a wider range of electric energy meters), and the electric energy sensor 0 at the uppermost stage in the electric energy meter to be calibrated and the electric energy sensor 0 'at the uppermost stage in the first quasi electric energy meter and the electric energy sensor m in the electric energy meter Y form a topological relationship between the total meter and the sub-meters, and the electric energy sensor (e.g. the electric energy sensor n') with known actual error in the first electric energy meter can be selected as an error reference standard device. Correspondingly, the relationship among the first electric energy meter, the electric energy meter Y and the electric energy meter can also be as shown in fig. 11, that is, the first electric energy meter can be represented as a single electric energy sensor 1'.

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

In this embodiment, according to the adjacent electric energy meter with the known actual error value, the electric energy sensor with the actual error value in the adjacent electric energy meter is selected as an error reference standard device, and the reference error value determined according to this method is the actual error value (also described as a real error), so that the actual error value of each electric energy sensor in the electric energy meter to be measured can be calculated under the condition that a relatively second electric energy conservation environment can be established based on the electric energy meter to be measured and the adjacent first electric energy meter and/or second electric energy meter.

In the third mode, when the error reference standard device is set, the measurement error of each electric energy sensor obtained in 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, 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 also puts higher requirements on the architectural relationship, data sharing and computing power of each electric energy meter in the current environment.

The method is as follows: a standard sharing mode is adopted, an electric energy sensor with a known or unknown error is connected in series with any branch pipeline in 1 electric energy array with 1 inlet and n outlets to be used as an error reference standard device, and the electric energy sensor error calculation corresponding to the electric energy array with 1 inlet and n outlets can be completed. Then, the same electric energy sensor with known or unknown error is connected in series to any branch pipeline in the adjacent 1 electric energy arrays with 1 inlet and n outlets through pipeline switching, and the electric energy sensor is used as an error reference standard device, so that the electric energy sensor error calculation of the adjacent 1 electric energy arrays with 1 inlet and n outlets can be completed. By sharing the standard method, the error magnitude transfer between 2 independent 1 in n out power arrays can be used.

Specifically, the multi-user electric energy meter 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 independent of each other, that is, the first 1 in n out electric energy array is subordinate to one electric energy meter, and the second 1 in n out electric energy array is subordinate to another electric energy meter; the electric energy meter also comprises an error reference standard device, the error reference standard device is arranged on a pipeline branch of the first 1 in n out electric energy array, 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; wherein a pipeline branch into which the error reference standard device is connected in series is switched by setting a state of a switch to selectively connect the error reference standard device in series to the first 1 in n out power array or the second 1 in n out power array.

In the embodiment, the error calibration of two independent 1-in-n-out power arrays 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 be incorporated into the power meter 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 sensors on all the input branches and the output branches in the multi-user electric energy meter 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 transmitted to the database server. Wherein, because the electric energy sensor has the error, correspondingly, the raw measurement data has the error.

Step 12: and calculating the reference measurement error value of the electric energy sensor in the electric energy array with 1 in and n out of which the error reference standard device is positioned by utilizing the relative energy conservation relation aiming at the electric energy array with 1 in and n out of 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 acquiring an electric energy array which is in an in-n-out relation with the electric energy sensor which is calculated to obtain the reference measurement error value at the previous stage or the next stage 1, and calculating to obtain the reference measurement error value of the electric energy sensor in the electric energy array corresponding to the in-n-out relation at the previous stage or the next stage 1 by utilizing the relative energy conservation relation.

Step 14: and calculating the reference measurement error values of the electric energy sensors in the electric energy array with 1 in and n out through one or more times of the previous stage or the next stage, thereby obtaining the reference measurement error values of all the electric energy sensors in the electric energy meter, 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 the error-free data of all the user electric energy meters.

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 sensor relative to the error reference standard device; when 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 sensor by utilizing the delta X deviation to obtain error-free data; alternatively, the first and second electrodes may be,

In the embodiment of the present invention, in order to improve the accuracy of the calculation, a line loss parameter variable may be further provided, but for indirect consideration of description, the line loss parameter variable 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, a description will be given taking an electric energy sensor as an example of an electric energy and electric energy device.

For a power supply system with m power supply lines and n consumers, the electric energy meter comprises at least (m + n) electric energy sensors, the electric energy (electric energy data) flowing through the electric energy meter conforms to the relative electric energy conservation law, namely: the sum of the input electric energy is the sum of the electric energy consumed by the user.

In this embodiment, a relative power conservation relation is established according to a first formula, where the first formula specifically is:

wherein, W_iRaw measurement data, X, of a power sensor representing the ith incoming line_iThe measurement error of the electric energy sensor of the ith incoming line is represented; w_jRaw measurement data, X, of the electric energy sensor representing the jth outgoing line_jAnd the measurement error of the electric energy sensor of the j outgoing line is shown. The meaning of the relative power conservation relation here is, for example, that power is: the line loss between the power sensors is usually included in the error of the power sensors, so as to form a relative power conservation equation.

And then 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 errors between the obtained compensated electric energy data and the real electric energy data are equal to the delta X deviation (namely equal deviation). That is, the (m + n) pieces of power data at any time point given by the power meter have a same error. This Δ X deviation is an equal error, which is the error of the error reference standard itself in the error measurement method. This means that the equal error of the error reference standard device is detected using any method, and the error value of the remaining (m + n-1) data is also known, thereby obtaining the true value (error-free data) of the power value.

Therefore, when the error reference standard devices are arranged in different ways, the data calibration method 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 sensor in the electric energy meter 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 to obtain error-free data.

When the error reference standard device is selected in the above manner, the measurement error of each electric energy sensor in the electric energy meter is obtained based on the error reference standard device, and the measurement error is the reference measurement error of each electric energy sensor and may not be equal to the actual error value. And calibrating the original measurement data according to the reference measurement error 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 electric energy meter, and error-free data can be obtained after the equal errors need to be eliminated.

Due to the equal error theory, the actual error value of each electric energy sensor minus the reference measurement error thereof is correspondingly equal to the Δ X deviation. Therefore, one electric energy sensor can be selected at will to obtain the actual error value of the electric energy sensor so as to obtain the delta X deviation of the electric energy meter, and therefore the compensated electric energy data of other electric energy sensors can be calibrated to obtain error-free electric energy data.

In this embodiment, after the Δ X deviation is obtained, the compensated power data of each power sensor is calibrated according to the Δ X deviation to obtain error-free power data of each power sensor, where the error-free power data is data with no error theoretically or data with negligible error.

Example 4:

in a practical application scenario, the embodiment divides a large-scale electric energy meter into a plurality of 1-in n-out electric energy arrays, and mainly aims to reduce the problem of collinearity caused by the similarity of electric energy data of users. When the electric energy data of the user does not have the similarity problem, the error of each electric energy sensor can be directly calculated according to a traditional mode to verify the original measurement data, another optional scheme is provided based on the actual use condition of the user, the processor can selectively select any mode to calculate according to the actual data scale, and the calculation flexibility is improved.

Specifically, the implementation of the present embodiment is as follows:

after the raw measurement data of the electric energy sensor is collected, determining the similarity of each raw measurement data, for example, determining the similarity of each raw measurement data in a curve or histogram drawing manner, wherein if two groups of raw measurement data are basically equal, it indicates that the similarity of the two groups of raw measurement data is extremely high, and the problem of co-linearity may be caused; if the two groups of original measurement data are not basically equal, the similarity of the original measurement data is not high, and the problem of co-linearity is basically not caused.

In the actual calculation process, if the similarity of at least two sets of raw measurement data is greater than the preset similarity threshold, the measurement errors of the electric energy sensors are calculated in a cascade manner in a hierarchical calculation manner, so as to verify the raw measurement data (i.e., the manner corresponding to embodiment 3).

If the similarity of each group of original measurement data is smaller than a preset similarity threshold, the electric energy sensors in the electric energy array at the last stage 1 in and n out are divided into sub-meters, and the electric energy sensors in the electric energy array at the top stage 1 in and n out are summed up to obtain the measurement errors of the corresponding electric energy sensors by utilizing the relative energy conservation relation, so as to check the original measurement data. Namely, an energy conservation formula is directly established between the electric energy sensor general meter in the electric energy array positioned at the top 1 in/n out and the electric energy sensor sub-meter in the electric energy array positioned at the last 1 in/n out, and the error of the corresponding electric energy sensor is determined so as to calibrate the original measurement data.

Based on this way, the error reference standard device generally selects a pipeline where the electric energy sensor sub-meter in the electric energy array located at the last stage 1 in n out is located, or selects a certain electric energy sensor sub-meter in the electric energy array located at the last stage 1 in n out as the error reference standard device. Then, the original measurement data is compensated 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 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. 12, 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. 12 illustrates the connection by a bus as an example.

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

1. A multi-user electric energy meter facilitating error checking, wherein a power supply system of a pipeline with electric energy sensors is constructed in a structure of a plurality of subsystems for facilitating error calculation, comprising: the electric energy array comprises at least two stages of 1 in-out electric energy arrays, wherein each stage of 1 in-out electric energy array comprises an electric energy sensor total meter positioned on an incoming line side and n electric energy sensor sub meters positioned on an outgoing line side, and the electric energy sensor total meter positioned on the incoming line side and the n electric energy sensor sub meters positioned on the outgoing line side form a relative energy conservation relation;

2. The multi-user electric energy meter according to claim 1, wherein the electric energy sensor comprises any one or more of a voltage sensor, a current sensor, an electric power sensor, or an electric energy sensor.

3. The multi-user electric energy meter according to claim 1, wherein in the 1 in and n out electric energy array, the electric energy sensor general meter at the incoming line side can be a three-phase electric energy meter with three-phase incoming lines, and the multi-user electric energy meter at the corresponding outgoing line side can be a three-phase electric energy meter with three-phase outgoing lines or a single-phase electric energy meter with single-phase outgoing lines; or, the electric energy sensor general meter positioned at the incoming line side can be a single-phase electric energy meter with a single-phase power supply, and the corresponding multi-user electric energy meter at the outgoing line side is a single-phase electric energy meter with a single-phase outgoing line.

4. The multi-user electric energy meter according to claim 1, wherein the 1 in n out electric energy array is a 1 in 2 out electric energy array, and the multi-user electric energy meter comprises a primary 1 in 2 out electric energy array;

5. The multi-user electric energy meter according to claim 1, further comprising an interface to which an error reference standard device is attached, the error reference standard device being connected in series via the interface to a branch of the multi-user electric energy meter in which a specific electric energy sensor is located;

6. The multi-user electric energy meter according to claim 1, wherein the incoming line power supply of the multi-user electric energy meter is three-phase power, and the interior of the multi-user electric energy meter 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 operate on different phases and are electrically independent from each other;

7. The multi-user electric energy meter according to claim 1, wherein the multi-user electric energy meter is divided into a first multi-user electric energy meter and a second multi-user electric energy meter, the first multi-user electric energy meter comprises a first 1 in n out electric energy array, the second multi-user electric energy meter 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 are different phases and can be electrically independent from each other;

8. The multi-user electric energy meter according to claim 1, comprising a microprocessor and a data transmission module, wherein the microprocessor is connected to each electric energy sensor, and the data transmission module is connected to the microprocessor and is configured to send the electric energy data collected by the microprocessor from each electric energy sensor to a cloud server.

9. An error checking method for a multi-user electric energy meter, the electric energy meter comprising: the electric energy array comprises at least two stages of 1 in-out electric energy arrays, wherein each stage of 1 in-out electric energy array comprises an electric energy sensor total meter positioned on an incoming line side and n electric energy sensor sub meters positioned on an outgoing line side, and the electric energy sensor total meter positioned on the incoming line side and the n electric energy sensor sub meters positioned on the outgoing line side form a relative energy conservation relation;

the error checking method comprises the following steps:

10. The error-checking method of claim 9, wherein the compensating the raw measurement data according to the reference measurement error value of each power sensor to obtain the equal error data or the error-free data comprises:

11. The error checking method according to claim 10, wherein obtaining Δ X deviation between a true error value and a reference error value of the error reference standard device specifically comprises:

taking down the selected electric energy sensor as an error reference standard device, and measuring the real error value of the taken-down electric energy sensor; and subtracting the reference error value of the selected electric energy sensor from the real error value of the taken-down electric energy sensor to obtain the delta X deviation.

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

13. The error-checking method of claim 10, wherein the error is referenced to an error value of a standard device, comprising:

in the multi-user electric energy meter, after any electric energy sensor is selected as an error reference standard device, a preset reference error value is matched with a measurement error of the error reference standard device, wherein the difference value between the preset reference error value of the error reference standard device and an actual error value of the error reference standard device is equal to the delta X deviation.

14. The error-checking method of claim 10, further comprising: