CN114152810A

CN114152810A - Three-phase electric energy sensor with three-way array structure and measuring system and method thereof

Info

Publication number: CN114152810A
Application number: CN202010936472.3A
Authority: CN
Inventors: 侯飞; 侯铁信; 金鹏; 汪毅; 钟晓清; 郑华; 刘春华; 段愿; 朱政
Original assignee: Wuhan National Survey Data Technology Co ltd
Current assignee: Wuhan National Survey Data Technology Co ltd
Priority date: 2020-09-08
Filing date: 2020-09-08
Publication date: 2022-03-08
Anticipated expiration: 2040-09-08
Also published as: CN114152810B

Abstract

The invention discloses a three-phase electric energy sensor with a three-way array structure and a measuring system and method thereof. The method comprises the steps of establishing a mathematical model by utilizing the electric energy conservation relation of an electric energy system, calculating electric energy measurement error devices of electric energy sensing units respectively arranged on 1 inlet and 2 outlets or 2 inlets and 1 outlet pipeline of the electric energy sensor with the three-way array structure by utilizing electric energy data detected by the electric energy sensor with the error reference standard device with the three-way array structure, and continuously and iteratively calculating the measurement error of the electric energy sensing units by utilizing the electric energy data obtained by the newly measured error compensation through calculation to obtain the electric energy sensor with the three-way array structure without error or the like. The multiple collinearity influence on electric energy data calculation caused by the similarity of the habits of using electric energy by users is weakened, and the calculation efficiency and the calculation precision are improved.

Description

Three-phase electric energy sensor with three-way array structure and measuring system and method thereof

Technical Field

The invention belongs to the technical field of intelligent meter measurement, and particularly relates to a three-phase electric energy sensor with a three-way array structure, a measurement system formed by the three-phase electric energy sensor and a measurement method.

Background

At present, a large number of meters such as an electric meter, a water meter, a gas meter or other flow meters are used, and the flow rate error cannot be detected in a laboratory due to too large amount of usage in real life. There is a need to find techniques and methods for online detection of errors in these flow sensors;

for a mathematical algorithm, when a flow measurement system is large, a plurality of flow sensors are included in the flow measurement system, the multiple collinearity problem of flow meter data can be derived from the similarity of user flow consumption habits, and the calculation accuracy of the data calculation method is influenced.

Conventionally, flow sensors are installed on a pipeline or a node of a measured flow measurement system, and a flow at each point is measured, and it is necessary to separately verify a measurement error of each flow sensor. The problem that this kind of method brings is that the work load of flow sensor error check-up is huge, and the cost is too high.

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

Disclosure of Invention

The invention provides a three-phase electric energy sensor with a three-way array structure, a measuring system and a measuring method thereof, aiming at constructing the electric energy measuring system with any scale by the three-phase electric energy sensor with the three-way array structure, dividing the electric energy measuring system with larger scale into a plurality of electric energy arrays with smaller scale by the three-phase electric energy sensor with the three-way array structure, wherein each electric energy array meets the law of relative energy conservation, respectively calculating the error of the three-phase electric energy sensor in each electric energy array, weakening the multiple collinearity influence of electric energy data calculation caused by similar habits of using electric energy by users, improving the calculation efficiency and the calculation precision, and solving the technical problem of multiple collinearity of electric energy data.

In order to achieve the above object, in a first aspect, the present invention provides a three-phase electric energy sensor with a three-phase array structure, the three-phase electric energy sensor with the three-phase array structure includes a 1-in 2-out or 2-in 1-out three-phase electric energy shunt structure, the electric energy shunt structure constitutes a three-phase electric energy system conforming to the electric energy conservation relation, wherein electric energy sensing units are respectively disposed on 1 inlet and 2 outlet or 2-in 1-out pipelines, an error reference standard device is connected in series on any pipeline, a mathematical model is established according to the electric energy conservation relation, and the electric energy data collected by the electric energy sensing units and the error reference standard device are utilized to complete the calculation of the measurement error of the electric energy sensing units, wherein the three-phase electric energy shunt structure includes 3 sets of single-phase three-phase electric energy sensor structures with 1-in 2-out or 2-in 1-out single-phase three-phase electric energy sensor structures with independent a phase, B phase and C phase single-phase electric energy sensing units under a 3 meter method electric energy measurement method An electric energy sensor; or, the three-phase electric energy shunting structure comprises 2 sets of single-phase three-way array structure electric energy sensors which are formed by 2 sets of independent single-phase electric energy sensing units and are relatively independent, wherein the single-phase three-way array structure electric energy sensors are 2 sets of single-phase electric energy sensors with 1 inlet and 2 outlet or 2 inlet and 1 outlet, and any set of single-phase three-way array structure electric energy sensors is selected; wherein, the electric energy sensing unit concrete expression is each single-phase electric energy sensing unit, and is specific:

establishing a mathematical model by utilizing the power conservation relation of a power system, calculating power measurement errors of power sensing units respectively arranged on inlet and outlet pipelines of the single-phase three-way array structure power sensor through power data detected by the power distribution structure and the error reference standard device, continuously and iteratively calculating the measurement errors of the power sensing units by utilizing the newly measured power data compensated by the calculated errors, and obtaining the single-phase power sensor of the three-way array structure power sensor without errors or the like;

the three-phase electric energy sensor with the three-way array structure is used for constructing an electric energy system with a measurable electric energy error, and the array layout of the electric energy system with the measurable electric energy error is completed in a mode of cascading the three-phase electric energy sensor with the three-way array structure.

Preferably, the three-phase electric energy sensor of the three-phase array structure is a three-phase electric energy sensor of 1 three-phase array structure with 3 single-phase three-phase array structure electric energy sensors, and specifically:

each single-phase three-way array structure electric energy sensor with 1 inlet and 2 outlets or 2 inlets and 1 outlets forms a single-phase electric energy system which accords with the electric energy conservation relation, wherein single-phase electric energy sensing units are respectively arranged on the single-phase pipelines with 1 inlet and 2 outlets or 2 inlets and 1 outlets, a mathematical model is established according to the electric energy conservation relation by connecting a single-phase error reference standard device on any pipeline in series, the calculation of the measuring error of the single-phase electric energy sensing units is completed by utilizing the electric energy data collected by the single-phase electric energy sensing units and the single-phase error reference standard device, the measuring error of the single-phase electric energy sensing units with A, B, C three phases is respectively calculated, the combined phase electric energy measuring error of the three-phase electric energy sensors with the three-way array structure is obtained by combined phase calculation, and the newly measured three-phase electric energy data is compensated by the calculated combined phase error, and continuously and iteratively calculating and compensating the measurement error of the electric energy sensing unit to obtain the three-phase electric energy sensor with the three-way array structure of the electric energy shunting structure without error or equal error.

Preferably, the three-phase electric energy sensor of the three-phase array structure is a three-phase electric energy sensor of a three-phase array structure formed by 2 single-phase three-phase array structure electric energy sensors, and specifically comprises:

1 single-phase three-way array structure electric energy sensor is connected with phase A current and phase AB voltage, the other 1 single-phase three-way array structure electric energy sensor is connected with phase C current and phase BC voltage, each single-phase 1-in 2-out or 2-in 1-out single-phase three-way array structure electric energy sensor forms a single-phase electric energy system conforming to the electric energy conservation relation, wherein, single-phase electric energy sensing units are respectively arranged on 1 inlet and 2 outlets or 2-in 1-out single-phase pipelines, a mode of connecting a single-phase error reference standard device in series on any pipeline is adopted, a mathematical model is established according to the electric energy conservation relation, electric energy data collected by the single-phase electric energy sensing units and the single-phase error reference standard device are utilized to complete the calculation of the measuring error of the single-phase electric energy sensing units, after the measuring error of the 2 single-phase electric energy sensing units is respectively calculated, the calculation is carried out through phase combination, and obtaining the three-phase electric energy sensor with the three-phase electric energy shunt structure without error or equal error by obtaining the phase combination electric energy measurement error of the three-phase electric energy sensor with the three-phase array structure, compensating newly measured three-phase electric energy data through the calculated phase combination error, and continuously and iteratively calculating and compensating the measurement error of the electric energy sensing unit.

In a second aspect, the present invention provides an electric energy measuring system composed of three-phase electric energy sensors in a three-way array structure, in an electric energy system provided with the three-phase electric energy sensors in the three-way array structure according to the first aspect, including: the three-phase electric energy sensor comprises at least two three-phase electric energy sensors with a three-way array structure, wherein each three-phase electric energy sensor with the three-way array structure of each three-way array structure comprises an electric energy sensing general meter unit positioned at an inflow side and 2 electric energy sensing sub meter units positioned at an outflow side; in a single-phase three-way array structure electric energy sensor, the electric energy of 1 electric energy sensing general meter unit and 2 electric energy sensing sub meter units form a relative electric energy conservation relation;

the three-phase electric energy sensors of the three-way array structure with the two adjacent stages of 1 in and 2 out are positioned in the same phase of electric energy, the electric energy sensing sub-meter unit positioned on the outflow side in the three-phase electric energy sensor of the three-way array structure with the one-stage 1 in and 2 out is an electric energy sensing main meter unit positioned on the inflow side in the three-phase electric energy sensor of the three-way array structure with the one-stage 1 in and 2 out.

Preferably, the electric energy measuring system is characterized by comprising n three-phase electric energy sensors with a three-way array structure, wherein every two three-phase electric energy sensors with the three-way array structure are mutually independent;

the electric energy measuring system further comprises an error reference standard device, and the error reference standard device is connected in series to any pipeline branch of any three-phase electric energy sensor of the n three-phase electric energy sensors of the three-phase array structure.

Preferably, if the electric energy measurement system adopts a 2-meter method electric energy measurement method, the electric energy measurement system comprises at least 2 three-phase electric energy measurement error reference standard devices, the three-phase electric energy measurement error reference standard devices are connected in series to two single-phase three-way array structure electric energy sensors of any one three-way array structure three-phase electric energy sensor, or at least 3 error reference standard devices, and the 3 error reference standard devices are respectively connected in series to any branch of the 3 single-phase three-way array structure electric energy sensors with 1 inlet and 2 outlet;

when the error reference standard device is arranged on a branch of the three-way array at the

last stage

1, 2, an error reference value is transmitted in a mode of calculation from the lower level to the upper level, so that the electric energy measuring system is calibrated to obtain error-free data or equal error data;

when the error reference standard device is arranged on a branch of the tee array at the top level 1, the inlet and the outlet 2, 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 measuring system and obtain error-free data or equal error data;

when the error reference standard device is arranged on a branch of the three-way array from the middle stage 1 to the inlet stage 2, 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 as to calibrate the electric energy measuring system and obtain error-free data or equal error data.

Preferably, the electric energy measuring system comprises a microprocessor and a data transmission module, the microprocessor is connected with each three-phase electric energy sensor, and the data transmission module is connected with the microprocessor and used for calculating the error edge of the three-phase electric energy sensor with the three-way array structure and/or sending electric energy data collected from each three-phase electric energy sensor to the cloud server.

In a third aspect, the present invention further provides a method for measuring an electric energy measurement system composed of three-phase electric energy sensors in a three-way array structure, where the electric energy measurement system composed of three-phase electric energy sensors in a three-way array structure includes: the three-phase electric energy sensor is of a three-way array structure with at least two stages of 1 in and 2 out, wherein the three-way array with each stage of 1 in and 2 out comprises an electric energy sensing total meter positioned at an inflow side and 2 three-phase electric energy sensor sub-meter units positioned at an outflow side, and the electric energy sensing total meter positioned at the inflow side and the 2 three-phase electric energy sensor sub-meter units positioned at the outflow side form a relative electric energy conservation relation;

the three-phase electric energy sensor sub-meter unit is positioned on the outflow side in the three-way array of the inlet 2 and the outlet 2 of the previous stage 1, and is an electric energy sensing general meter of the inlet side of the three-way array of the inlet 2 and the outlet 2 of the next stage 1;

the error checking method comprises the following steps:

an error reference standard device is appointed or established in the electric energy measuring system, and a reference error value is given to the error reference standard device;

acquiring original measurement data of three-phase electric energy sensors on all input branches and output branches in the electric energy measurement system and original measurement data of the error reference standard device;

calculating reference measurement error values of the three-phase electric energy sensors in the 1-in 2-out three-way array where the error reference standard device is located by utilizing a mathematical model established by a relative electric energy conservation relation aiming at the 1-in 2-out three-way array where the error reference standard device is located;

acquiring a three-phase electric energy sensor of a three-way array structure which has a relation of 1 in 2 out at the previous stage or the next stage with the three-phase electric energy sensor of the three-way array structure which has been calculated to obtain a reference measurement error value, and calculating to obtain the reference measurement error value of the electric energy sensing unit in the three-way array corresponding to 1 in 2 out at the previous stage or the next stage by utilizing a relative electric energy conservation relation;

and calculating the reference measurement error value process of the three-phase electric energy sensors in the three-way array with 1 inlet and 2 outlets by one or more times of the previous stage or the next stage to obtain the reference measurement error values of the three-phase electric energy sensors with all three-way array structures in the electric energy measurement system, and compensating the original measurement data according to the reference measurement error value of the three-phase electric energy sensor with each three-way array structure to obtain 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 sensing unit 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 three-phase electric energy sensor relative to the error reference standard device; when a delta X deviation exists between a real error value and a reference error value of the error reference standard device, compensating equal error data of each corresponding three-phase 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 of the three-phase electric energy sensor corresponding to each three-way array structure according to the real error value of the error reference standard device.

Preferably, the obtaining of the Δ X deviation between the real error value and the reference error value of the error reference standard device specifically includes:

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

Preferably, the error reference standard means and the assigned reference error value are determined as follows:

a first three-phase electric energy sensor unit with a known real error value is connected in series to any pipeline branch of any three-phase electric energy sensor of any three-way array structure of the electric energy measuring system;

in the running process of the electric energy measuring system, respectively reading the electric energy data of the first three-phase electric energy sensor unit and the electric energy data of the three-phase electric energy sensor on the selected branch, and calculating the real error value of the three-phase electric energy sensor on the selected branch;

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

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

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

Preferably, the method for measuring the electric energy system formed by the three-way array further comprises:

after the original measurement data of the three-phase 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 larger than a preset similarity threshold, the measurement error of each three-phase electric energy sensor is calculated in a cascade mode in a grading calculation mode 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, the three-phase electric energy sensors in the three-way array at the last stage 1 in 2 out are divided into sub-meters, and the electric energy sensor general meter in the three-way array at the top stage 1 in 2 out and the electric energy sensor general meter utilize the relative electric energy conservation relation to obtain the measurement error of the corresponding three-phase electric energy sensors so as to check the original measurement data.

Preferably, after the layout of the three-way array in the electric energy system is completed, and the electric energy measurement error calculation of the three-phase electric energy sensor respectively arranged on the 1 inlet line and the 2 outlet lines is completed, the error of the electric energy measurement device in the electric energy system on the corresponding pipeline is continuously and iteratively calculated by using the measurement data obtained after the error correction in the three-way array.

Generally, compared with the prior art, the technical scheme of the invention has the following beneficial effects: the invention provides a three-phase electric energy sensor with a three-way array structure, a measuring system and a measuring method formed by the three-phase electric energy sensor, wherein the electric energy measuring system comprises at least two three-phase electric energy sensors with the three-way array structure, the three-phase electric energy sensor with the three-way array structure can be used for constructing an electric energy measuring system with any scale, the three-phase electric energy sensor with the three-way array structure can be used for dividing an electric energy measuring system with a large scale into a plurality of electric energy arrays with small scales, each electric energy array meets the relative energy conservation law, errors of the three-phase electric energy sensor in each electric energy array are respectively calculated, multiple collinearity influences of electric energy data calculation caused by similarity of habits of using electric energy of users are weakened, and the calculating efficiency and the calculating 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 single-phase three-way array structure electric energy sensor in a three-phase electric energy sensor with a three-way array structure according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a measurement system formed by single-phase three-way array structure electric energy sensors on one phase in a three-phase electric energy sensor of a three-way array structure provided in 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 a measurement method of an electric energy system formed by a three-way array 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 structural diagram of an error measurement apparatus according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

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

The error reference standard device refers to a standard device used as an error reference standard, so that the determination error in the description refers to the standard device, and the electric energy data reported by the error reference standard device is used as the error reference standard for breaking the homogeneous equation in the calculation process. Whether using physical experimentation or mathematical calculation, the measurement of any one quantity is relative to a reference; the detection of any one measurement error is relative to an error reference, and the standard or data for the error reference is referred to as the error reference. For example, a "standard meter" in the experiment of error checking of the conventional electric energy meter is an error reference standard. When the error is calculated by using the electric energy data, the data error of the electric energy 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:

a three-phase electric energy sensor with a three-way array structure is shown in figure 1 (which is a schematic diagram of the three-phase electric energy sensor with the three-way array structure under a 3-meter electric energy metering method), the three-phase electric energy sensor with the three-way array structure comprises a 1-in 2-out or 2-in 1-out three-phase electric energy shunt structure, the electric energy shunt structure forms a three-phase electric energy system which accords with an electric energy conservation relation, wherein electric energy sensing units are respectively arranged on pipelines of 1 inlet and 2 outlets or 2-in 1-out pipelines, an error reference standard device is connected on any pipeline in series, a mathematical model is established according to the electric energy conservation relation, electric energy data collected by the electric energy sensing units and the error reference standard device are utilized to complete calculation of measurement errors of the electric energy sensing units, and the three-phase electric energy shunt structure is under the 3-meter electric energy metering method, the single-phase three-way array structure electric energy sensor comprises 3 sets of single-phase three-way array structure electric energy sensors which are independent and are formed by independent A-phase, B-phase and C-phase single-phase electric energy sensing units, wherein the single-phase three-way array structure electric energy sensors are 1 in and 2 out or 2 in and 1 out; or, the three-phase electric energy shunting structure comprises 2 sets of single-phase three-way array structure electric energy sensors which are formed by 2 sets of independent single-phase electric energy sensing units and are relatively independent, wherein the single-phase three-way array structure electric energy sensors are 2 sets of single-phase electric energy sensors with 1 inlet and 2 outlet or 2 inlet and 1 outlet, and any set of single-phase three-way array structure electric energy sensors is selected; wherein, the electric energy sensing unit concrete expression is each single-phase electric energy sensing unit, and is specific:

establishing a mathematical model by utilizing the power conservation relation of a power system, calculating power measurement errors of power sensing units respectively arranged on inlet and outlet pipelines of the single-phase three-way array structure power sensor through power data detected by the power distribution structure and the error reference standard device, continuously and iteratively calculating the measurement errors of the power sensing units by utilizing the newly measured power data compensated by the calculated errors, and obtaining the single-phase power sensor of the three-way array structure power sensor without errors or the like; it is based on the principle that the measurement error of the electric energy sensing unit is continuously calculated in an iterative manner until the difference between the results of the calculated error values of the two times is smaller than a preset value (the preset value is obtained according to experience and test experiments, and is not specifically described here), and then the error-free or equal error value of each electric energy sensor in the single-phase three-way array structure electric energy sensor can be determined.

The embodiment of the invention provides a three-phase electric energy sensor with a three-way array structure, wherein the three-phase electric energy sensor with the three-way array structure can be used for constructing an electric energy measuring system with any scale, the electric energy measuring system with a large scale can be divided into a plurality of electric energy arrays with small scales through the three-phase electric energy sensor with the three-way array structure, each electric energy array meets the relative energy conservation law, errors of the three-phase electric energy sensor in each electric energy array are calculated respectively, multiple collinearity influences of electric energy data calculation caused by similar habits of using electric energy by users are weakened, and the calculating efficiency and the calculating precision are improved.

In the embodiment of the present invention, if the three-phase electric energy sensor with the three-way array structure uses 3 single-phase three-way array structure electric energy sensors to form 1 three-phase electric energy sensor with the three-way array structure with the 3-meter method, specifically:

On the other hand, in the embodiment of the present invention, if the three-phase electric energy sensor with the three-way array structure uses 2 single-phase three-way array structure electric energy sensors to form 1 three-phase electric energy sensor with the three-way array structure with the 2-meter method, specifically:

Example 2:

the present invention also provides an electric energy measuring system constituted by a three-phase electric energy sensor of a three-way array structure, in an electric energy system provided with a three-phase electric energy sensor of a three-way array structure as described in embodiment 1, the electric energy measuring system includes: the three-phase electric energy sensor comprises at least two three-phase electric energy sensors with a three-way array structure, wherein each three-phase electric energy sensor with the three-way array structure of each three-way array structure comprises an electric energy sensing general meter unit positioned at an inflow side and 2 electric energy sensing sub meter units positioned at an outflow side; in a single-phase three-way array structure electric energy sensor, the electric energy of 1 electric energy sensing general meter unit and 2 electric energy sensing sub meter units form a relative electric energy conservation relation; as shown in fig. 2, a schematic diagram of a cascade structure effect is formed by taking a certain phase of a three-phase electric meter as an example;

The embodiment of the invention provides a measuring system formed by three-phase electric energy sensors of a three-way array structure, wherein the three-phase electric energy sensors of the three-way array structure can be used for constructing an electric energy measuring system of any scale, the electric energy measuring system with a large scale can be divided into a plurality of electric energy arrays with small scales through the three-phase electric energy sensors of the three-way array structure, each electric energy array meets the law of relative energy conservation, errors of the three-phase electric energy sensors in each electric energy array are calculated respectively, multiple collinearity influences of users on electric energy data calculation caused by similar habits of using electric energy are weakened, and the calculating efficiency and the calculating precision are improved.

In combination with the embodiment of the present invention, there is a preferred implementation scheme, where the electric energy measurement system includes n three-phase electric energy sensors of a three-way array structure, where every two three-phase electric energy sensors of each three-way array structure are independent of each other;

In combination with the embodiment of the present invention, there is a preferred implementation scheme, where the electric energy measurement system adopts a 2-meter method for electric energy measurement, the electric energy measurement system includes at least 2 three-phase electric energy measurement error reference standard devices, the three-phase electric energy measurement error reference standard devices are connected in series to two single-phase three-way array structure electric energy sensors of any three-way array structure three-phase electric energy sensor, or includes at least 3 error reference standard devices, and the 3 error reference standard devices are respectively connected in series to any branch of each of 3 1-in 2-out single-phase three-way array structure electric energy sensors;

last stage

In combination with the embodiment of the present invention, there is a preferred implementation scheme, where the power measurement system includes a microprocessor and a data transmission module, the microprocessor is connected to each three-phase power sensor, and the data transmission module is connected to the microprocessor, and is used for calculating an error edge of the three-phase power sensor in the three-way array structure, and/or is used for sending power data collected from each three-phase power sensor to the cloud server.

In combination with the embodiment of the present invention, there is a preferred implementation scheme, where the electric energy measurement system further includes an error reference standard device, and the error reference standard device is connected in series to any branch of the three-phase electric energy sensor of the three-way array structure;

last stage

Example 3:

the embodiment of the invention also provides a measuring method of an electric energy measuring system formed by the three-phase electric energy sensor with the three-way array structure, and the electric energy system formed by the three-phase electric energy sensor with the three-way array structure comprises the following steps: the three-phase electric energy sensor is of a three-way array structure with at least two stages of 1 in and 2 out, wherein the three-way array with each stage of 1 in and 2 out comprises an electric energy sensing total meter positioned at an inflow side and 2 three-phase electric energy sensor sub-meter units positioned at an outflow side, and the electric energy sensing total meter positioned at the inflow side and the 2 three-phase electric energy sensor sub-meter units positioned at the outflow side form a relative electric energy conservation relation;

the error checking method comprises the following steps:

The embodiment of the invention provides a measuring method formed by three-phase electric energy sensors of a three-way array structure, wherein the three-phase electric energy sensors of the three-way array structure can be used for constructing an electric energy measuring system of any scale, the electric energy measuring system with a large scale can be divided into a plurality of electric energy arrays with small scales through the three-phase electric energy sensors of the three-way array structure, each electric energy array meets the law of relative energy conservation, errors of the three-phase electric energy sensors in each electric energy array are calculated respectively, multiple collinearity influences of users on electric energy data calculation caused by similar habits of using electric energy are weakened, and the calculating efficiency and the calculating precision are improved.

In combination with the embodiment of the present invention, there is a preferred implementation scheme, where the compensating the raw measurement data according to the reference measurement error value of each electrical energy sensing unit to obtain equal error data or error-free data includes:

An optimal implementation scheme is provided in combination with the embodiment of the present invention, and the Δ X deviation between the true error value and the reference error value of the error reference standard device is obtained, specifically:

A preferred implementation exists in conjunction with the embodiments of the present invention to determine an error reference standard device and a reference error value assigned thereto, specifically:

There is a preferred implementation in combination with the embodiment of the present invention, where the reference error value of the error reference standard device includes:

In combination with the embodiment of the present invention, there is a preferred implementation, where the method for measuring an electric energy system formed by a three-way array further includes:

In combination with the embodiment of the present invention, there is a preferred implementation scheme that after completing the layout of the three-way array in the electric energy system and completing the calculation of the electric energy measurement errors of the three-phase electric energy sensors respectively arranged on the 1 inlet line and the 2 outlet lines, the error of the electric energy measurement device in the electric energy system on the corresponding pipeline is continuously and iteratively calculated by using the measurement data obtained by revising the errors in the three-way array.

Example 4:

at present, when the scale of an electric energy measurement system is large, due to the similarity of electric energy consumption habits of users, the problem of multiple collinearity of electric energy meter data is derived, so that not only can the calculation efficiency be reduced, but also the calculation accuracy of the data calculation method is influenced. In the embodiments and the following embodiments of the present invention, the single-phase power sensor in the three-phase power sensor is taken as an object of description to show the specific implementation processes of embodiments 1 to 3 of the present invention. As for those skilled in the art, the process of implementing the phase combination calculation according to the 3-table method or the 2-table method belongs to the well-known technical content in the field of three-phase power, and therefore, the description is omitted.

In order to solve the foregoing problems, the present embodiment provides an electric energy measuring system convenient for error calibration, in practical use, the electric energy measuring system of a pipeline with an electric energy sensor is configured as a structure of a plurality of subsystems convenient for error calculation, the electric energy measuring system includes at least two stages of electric energy sensors with a 1-in-2-out single-phase three-way array structure, wherein the electric energy sensor with the 1-in-2-out single-phase three-way array structure can not only configure an electric energy measuring system of any scale, but also divide each single-phase electric energy measuring system in a three-phase electric energy measuring system with a large scale into a plurality of electric energy arrays with a small scale through the electric energy sensor with the 1-in-2-out single-phase three-way array structure, each electric energy array satisfies a relative energy conservation law, and calculates errors of the electric energy sensors in each electric energy array respectively, the problem of multiple collinearity of the 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. 2, a schematic structural diagram of the electric energy measurement system of the present embodiment is described, and the electric energy measurement system includes: the electric energy sensor with the three-way array structure comprises at least two stages of 1-in 2-out electric energy sensors, wherein each stage of the 1-in 2-out electric energy sensors with the three-way array structure comprises an electric energy sensor general meter unit positioned on an incoming line side and 2 electric energy sensor sub meter units positioned on an outgoing line side, and a relative energy conservation relation is formed by the electric energy sensor general meter unit positioned on the incoming line side and the 2 electric energy sensor sub meter units positioned on the outgoing line side.

The electric energy sensors of the single-phase three-way array structure with the two adjacent stages of 1 in and 2 out are divided into meter units at the wire outlet side in the electric energy sensors of the single-phase three-way array structure with the one-stage 1 in and 2 out, and the electric energy sensors of the single-phase three-way array structure with the one-stage 1 in and 2 out are a total meter unit at the wire inlet side.

In this embodiment, the upper stage and the lower stage are relative concepts, wherein the electric energy sensor excluding the uppermost stage and the last stage is an electric energy sensor located in the middle, and among the different electric energy sensors of the single-phase three-way array structure with 1 in and 2 out, the electric energy sensor may be an electric energy sensor belonging to the single-phase three-way array structure with 1 in and 2 out of the upper stage, or an electric energy sensor belonging to the single-phase three-way array structure with 1 in and 2 out of the lower stage, and when a certain electric energy sensor is an electric energy sensor belonging to the electric energy sensor of the single-phase three-way array structure with 1 in and 2 out of 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 sensor of the single-phase three-way array structure with the inlet and the outlet of the next stage 1, the electric energy sensor is an electric energy sensor general meter.

The error calculation and compensation of the electric energy sensor of the 1-in 2-out three-way array structure is explained.

For a 1 inflow line and 2 outflow line power measurement system, the power conforms to the relative power conservation relationship, i.e., the following equation is satisfied:

wherein w is in the above formula₀，x₀And 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 data for not less than 2 times by using any known quantity.

The calculated error value is used for compensating the reading of the electric energy sensor general meter unit and the reading of 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 unit and the electric energy sensor sub-meter, wherein the compensated data also meet the relative energy conservation relation:

in the foregoing calculation process, an error reference standard needs to be set, and error-free data or equal error data can be obtained through the error reference standard, so that error correction is performed on the electric energy measurement system.

The selection or setting of the reference standard for error includes at least the following ways: a cascade computing transfer method; a method of sharing a standard; a standard method of concatenation; and (4) a post correction method.

The cascade computation transfer method comprises the following steps: an electric energy sensor is selected as an error reference standard device on a branch of the electric energy sensor of the single-phase three-way array structure from the inlet 1 to the outlet 2 of a certain stage, and a reference error value is given to the error reference standard device.

Specifically, when the error reference standard device is arranged on a branch of the single-phase three-way array structure electric energy sensor with the

last stage

1, 2 and out, an error reference value is transmitted in a mode of progressive calculation from a lower stage to an upper stage so as to calibrate the electric energy measuring system, and error-free data or equal error data is obtained; when the error reference standard device is arranged on a branch of the single-phase three-way array structure electric energy sensor with the inlet and outlet of the uppermost level 1 and the outlet of the uppermost level 2, an error reference value is transmitted in a mode of progressive calculation from the upper level to the lower level so as to calibrate the electric energy measuring system and obtain error-free data or equal error data. In a preferred embodiment, the error reference standard device may be disposed at the middle stage, so that the calibration may be performed from the middle stage to both ends, and the calculation efficiency may be improved, specifically, when the error reference standard device is disposed on the branch of the single-phase three-way array structure electric energy sensor at the

middle stage

1 and 2, the error reference value is transmitted by a manner of calculation from the middle stage to the upper stage and a manner of calculation from the middle stage to the lower stage, so as to calibrate the electric energy measurement system, and obtain error-free data or equal error data.

For example, a "1" in the power sensor of the single-phase three-way array structure with 1 in 2 out at each lower level (for which the error value is calculated) may be a subset of a "2" in the power sensor of the single-phase three-way array structure with 1 in 2 out at another upper level (for which the error value is yet to be calculated); similarly, one subset of "2" in the single-phase three-way array structure electric energy sensor of 1 in 2 out at each upper level (with error values already calculated) can be "1" in the "1 in 2 array unit" at another lower level (with errors yet to be calculated). In this way, error reference values are transmitted in a cascading mode, and verification is performed on each independent electric energy sensor in the electric energy sensors with the single-phase three-way array structure with 1 inlet and 2 outlets respectively.

When delta X deviation exists between the real error value and the reference error value of the error reference standard device, the equal error data of each corresponding electric energy sensor is compensated by the delta X deviation, and error-free data are obtained. When the reference error value of the error reference standard device is the same as the real error value of the error reference standard device, calculating to obtain error-free data corresponding to each electric energy 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: one known or unknown error electric energy sensor is connected in series with any branch pipeline in 1 single-phase three-way array structure electric energy sensors with 1 inlet and 2 outlets and used as an error reference standard device, and the electric energy sensor error calculation corresponding to the single-phase three-way array structure with 1 inlet and 2 outlets can be completed. Then, the same electric energy sensor with known or unknown error is connected in series to any branch pipeline of the electric energy sensors of the adjacent 1 single-phase three-way array structure with 1 inlet and 2 outlets through pipeline switching, and the branch pipeline is used as an error reference standard device, so that the electric energy sensor error calculation of the adjacent 1 single-phase three-way array structure with 1 inlet and 2 outlets can be completed. By sharing the standard method, the error value transfer can be carried out between 2 independent single-phase three-way array structure electric energy sensors with 1 in and 2 out.

Specifically, the power measurement system comprises a first 1-in 2-out single-phase three-way array structure power sensor and a second 1-in 2-out single-phase three-way array structure power sensor, wherein the first 1-in 2-out single-phase three-way array structure power sensor and the second 1-in 2-out single-phase three-way array structure power sensor are independent of each other;

the electric energy measuring system further comprises an error reference standard device, the error reference standard device is arranged on a pipeline branch of the electric energy sensor with the single-phase three-way array structure at the first 1 in 2 out, the error reference standard device is also arranged on a pipeline branch of the electric energy sensor with the single-phase three-way array structure at the second 1 in 2 out, and a switch is arranged on the selected pipeline branch; wherein, the pipeline branch into which the error reference standard device is connected in series is switched through the state of a setting switch so as to selectively connect the error reference standard device in series to the first 1-in 2-out single-phase three-way array structure electric energy sensor or the second 1-in 2-out single-phase three-way array structure electric energy sensor.

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 single-phase three-way array structure power sensor with 1 in 2 out as an example for explanation, the power sensor with the first single-phase three-way array structure with 1 in 2 out and the power sensor with the second single-phase three-way array structure with 1 in 2 out are independent, the error is connected in series with the standard device on one of the pipeline branches of the power sensor with the single-phase three-way array structure with 1 in 2 out and the power sensor with the single-phase three-way array structure with 1 in 2 out, meanwhile, a switch K1 is arranged on a pipeline branch of the electric energy sensor of the single-phase three-way array structure with the first 1 inlet and the second 2 outlet, a switch K1 is connected with an error reference standard device in parallel, the switch K1 and the error reference standard device are both connected with the electric energy sensor on the selected branch in series, a switch K2 is arranged between the error reference standard device and the electric energy sensor on the selected branch circuit; meanwhile, a switch K3 is arranged on a pipeline branch of the electric energy sensor of the single-phase three-way array structure with the second 1 inlet and the second 2 outlet, a switch K3 is connected with the error reference standard device in parallel, the switch K3 and the error reference standard device are both 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 electric energy sensor of the single-phase three-way array structure of the first 1 in 2 out, and the electric energy sensor of the single-phase three-way array structure of the first 1 in 2 out is subjected to error checking as an error reference standard.

In practical use, when the switch K1 is set to be in a closed state, the switch K2 is set to be in an open state, the switch K3 is set to be in an open state, and the switch K4 is set to be in a closed state, the error reference standard device is connected in series to the corresponding pipeline of the electric energy sensor of the single-phase three-way array structure in the second 1 in 2 out, and the electric energy sensor of the single-phase three-way array structure in the second 1 in 2 out is subjected to error checking as an error reference standard.

In the embodiment, the error calibration of the two independent 1-in 2-out single-phase three-way array structure electric energy sensors can be completed through one error reference standard device, and the normal work of each other is not influenced. In the single-phase three-way array structure power sensor with 1 in and 2 out, the method for sharing the standard is similar, and the detailed description is omitted.

Wherein, the standard method of concatenation refers to: any branch pipeline of the electric energy sensor with known errors is connected in series into the electric energy sensor with the single-phase three-way array structure with the inlet 1 and the outlet 2 and used as an error reference standard device, and the electric energy sensor error calculation with the single-phase three-way array structure with the inlet 1 and the outlet 2 can be completed.

The post correction method comprises the following steps: and selecting 1 branch electric energy sensor in the electric energy sensors of the single-phase three-way array structure with 1 inlet and 2 outlets, giving a reference error value to the branch electric energy sensors, and calculating the errors of all the electric energy sensors of the single-phase three-way array structure with 1 inlet and 2 outlets. The method comprises the steps of taking down any branch pipeline electric energy sensor from the single-phase three-way array structure electric energy sensor with the inlet 1 and the outlet 2, measuring a real error value by using a standard experimental 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, and correcting original measurement data to obtain error-free data.

Further, the electric energy measuring system 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 the 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 measurement system provided by the invention includes at least two stages of electric energy sensors with a 1-in 2-out single-phase three-way array structure, wherein the electric energy sensors with the 1-in 2-out single-phase three-way array structure can not only construct an electric energy measurement system of any scale, but also divide an electric energy measurement system with a large scale into a plurality of electric energy arrays with a small scale through the electric energy sensors with the 1-in 2-out single-phase three-way array structure, each electric energy array satisfies a relative energy conservation law, errors of the electric energy sensors in each electric energy array are respectively calculated, multiple collinearity influences facing electric energy data calculation caused by the habit similarity of using electric energy by users are weakened, and the calculation efficiency and the calculation accuracy are improved.

Example 5:

in practical use, the single-phase three-way array structure electric energy sensor with 1 in and 2 out has various application scenarios, for example, the single-phase three-way array structure electric energy sensor with 1 in and 2 out can be used as an error correction tool of an electric energy meter, and the single-phase three-way array structure electric energy sensor with 1 in and 2 out is used as an error-free sensor system by utilizing calculation error and error compensation to check the error of the electric energy sensor connected in series on a pipeline branch of the electric energy sensor; the single-phase three-way array structure electric energy sensor with the inlet 1 and the outlet 2 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 the single-phase three-way array structure of 1 inlet and 2 outlet.

In addition, the single-phase three-way array structure electric energy sensors with 1 inlet and 2 outlets can be connected in an expanding mode, and the method for cascading expanding the electric energy measuring system comprises the following steps: the electric energy measuring system capable of measuring the errors of the electric energy sensors can be constructed by cascading 2 single-phase three-way array structure electric energy sensors with 1 inlet and 2 outlet, specifically, 1 in the electric energy sensors with the single-phase three-way array structure with 1 inlet and 2 outlet in the lower level is connected to the electric energy sensors with the single-phase three-way array structure with 1 inlet and 2 outlet in the upper level (to be calculated for errors) to become a subset of 2, and 2 electric energy sensors with the single-phase three-way array structure with 1 inlet and 2 outlet are connected to form 1 new electric energy measuring system, wherein the error values of all the electric energy sensors can be obtained through calculation.

In addition, the 1-in-2-out single-phase three-way array structure electric energy sensor can cope with sensor burst faults, for example, for 3 electric energy sensors in the 1-in-2-out single-phase three-way array structure electric energy sensors, if the jth electric energy sensor has a burst fault and loses the function of electric energy measurement, the electric energy data w 'of the burst fault electric energy sensor 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 measurement system can be constructed by the single-phase three-way array structure electric energy sensor with 1 in and 2 out, the scale of the electric energy measurement system is reduced as much as possible, multiple collinearity influences on 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 single-phase three-way array of power sensors with 1 in and 2 out in an electric meter box is illustrated 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 the electric energy sensor with the single-phase three-way array structure of the last stage 1 in and 2 out is used for being coupled with a line of the user to detect the electricity utilization condition of the user, the sampling resistors of the electric energy sensors with the single-phase three-way array structure of the other stage 1 in and 2 out are all integrated in a meter calibrating device, so that 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 at each time is reduced, the calculation efficiency can be improved, and the multiple collinearity influence faced by the electric energy data calculation caused by the habit similarity of the electricity utilization of the user can be weakened.

Combine fig. 5, the product form of another kind of ammeter case has been demonstrated, electric energy sensor specifically can be sampling resistor, acquire user's power consumption condition through sampling resistor, wherein, last one-level 1 advances 2 single-phase three-way array structure's electric energy sensor's sampling resistor (branch table) is used for coupling with user's circuit, with the power consumption condition of detection user, other level 1 advances 2 single-phase three-way array structure's electric energy sensor's sampling resistor of structure and all integrates and set up in the school table ware, furthermore, ammeter case still includes user's ammeter, user's ammeter is connected with the sampling resistor who is located the most end, with the power consumption that shows the user. 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 capacity at every turn, can promote computational efficiency, moreover, can weaken the multiple collinearity influence that the custom similarity that the user used the electric quantity caused electric energy data to calculate to face.

The ammeter case that figure 5 demonstrates has set up the user's ammeter in user's side, and the user's ammeter is used for showing user's power consumption, and the user can learn its power consumption condition through the electric quantity display of user's 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 electric meter box in the form of fig. 5 has a display function which is not used, and the electric meter box shown in fig. 4 can be popularized to reduce the cost while ensuring the electric quantity detection function.

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 quantity, when the user need acquire its power consumption condition, can establish the connection with corresponding cloud server, acquires its power consumption condition 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 6:

with reference to the electric energy measurement system in the foregoing embodiment, this embodiment provides a measurement method for an electric energy system formed by a three-way array of the electric energy measurement system, where the electric energy measurement system includes: the electric energy sensor with the single-phase three-way array structure comprises at least two stages of 1-in 2-out electric energy sensors, wherein each stage of 1-in 2-out electric energy sensor with the single-phase three-way array structure comprises an electric energy sensor general meter unit positioned on an incoming line side and 2 electric energy sensor sub meter units positioned on an outgoing line side, and a relative energy conservation relation is formed by the electric energy sensor general meter unit positioned on the incoming line side and the 2 electric energy sensor sub meter units positioned on the outgoing line side; the electric energy sensors of the single-phase three-way array structure with the two adjacent stages of 1 in and 2 out are divided into meter units, positioned on the wire outlet side, of the electric energy sensors of the single-phase three-way array structure with the one-stage 1 in and 2 out, and a total meter of the electric energy sensors, positioned on the wire inlet side, of the electric energy sensors of the single-phase three-way array structure with the one-stage 1 in and 2 out;

referring to fig. 6, the method for measuring the electric energy system formed by the three-way array includes the following steps:

step 10: an error reference standard device is designated or established in the electric energy measurement system and is assigned a reference error value.

In this embodiment, in order to calibrate the raw data, an error reference standard device needs to be set first, and then the raw measurement data needs to be calibrated based on the error reference standard device, so as to eliminate errors and obtain more accurate power data. There are at least several ways to set the error reference standard device.

The first method is as follows: by using a post calibration method, the determining an error reference standard device, specifically, selecting an electric energy sensor as an error reference standard device in the electric energy measurement system, 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 measurement system and an actual error value of the selected power sensor is measured.

Referring to fig. 2, the electric energy measurement system includes a large number of electric energy sensors, wherein each of the electric energy sensors of the single-phase three-way array structure with 1 inlet and 2 outlets in each stage includes 3 electric energy sensors, one electric energy sensor general meter is used for measuring incoming line energy, 2 electric energy sensor branch meters are used for measuring branch line energy, and the 3 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.

Aiming at the single-phase three-way array structure electric energy sensor with the inlet and the outlet of each stage 1, one electric energy sensor can be selected from 3 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 deviation.

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 is specifically configured to connect a first electric energy sensor unit with a known actual error value in series on a branch where any one electric energy sensor in the electric energy measurement system is located, and then calculate to obtain a reference measurement error of each electric energy sensor in the electric energy measurement system, as shown in fig. 8, the specific electric energy measurement system includes:

step 1121: and respectively reading the electric energy data of the first electric energy sensor unit and the electric energy data of the electric energy sensors on the branches in the running process of the electric energy measuring system, 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 measuring system is calculated by using the calculated actual error value of the electric energy sensors on the selected branch.

In the implementation process of the second mode, it is also recommended to set an interface for the first power sensor unit to intervene in a certain branch or multiple branches of the existing power measurement system.

The third method comprises the following steps: by adopting a cascade computing and transferring method, if the electric energy measuring system and the adjacent first electric energy measuring system and/or second electric energy measuring system can construct a relative second electric energy conservation environment, the error reference standard determining device is specifically that an electric energy sensor with a known actual error value is arbitrarily selected from the first electric energy measuring system and/or the second electric energy measuring system to serve as the error reference standard device; then, the calculating to obtain the reference measurement error of each electric energy sensor in the electric energy measurement system, 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 measuring system and each electric energy sensor in the adjacent first electric energy measuring system and/or second electric energy measuring system.

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

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

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 of the third way also puts higher demands on the architectural relationship, data sharing and computing capability of each electric energy measurement system in the current environment.

The method is as follows: by adopting a standard sharing mode, one known or unknown error electric energy sensor is connected in series with any branch pipeline of 1 single-phase three-way array structure electric energy sensors with 1 inlet and 2 outlets and used as an error reference standard device, and the error calculation of the electric energy sensors corresponding to the single-phase three-way array structure with 1 inlet and 2 outlets can be completed. Then, the same electric energy sensor with known or unknown error is connected in series to any branch pipeline of the electric energy sensors of the adjacent 1 single-phase three-way array structure with 1 inlet and 2 outlets through pipeline switching, and the branch pipeline is used as an error reference standard device, so that the electric energy sensor error calculation of the adjacent 1 single-phase three-way array structure with 1 inlet and 2 outlets can be completed. By sharing the standard method, the error value transfer can be carried out between 2 independent single-phase three-way array structure electric energy sensors with 1 in and 2 out.

Specifically, the power measurement system comprises a first 1-in 2-out single-phase three-way array structure power sensor and a second 1-in 2-out single-phase three-way array structure power sensor, wherein the first 1-in 2-out single-phase three-way array structure power sensor and the second 1-in 2-out single-phase three-way array structure power sensor are independent of each other, that is, the first 1-in 2-out single-phase three-way array structure power sensor is subordinate to one power measurement system, and the second 1-in 2-out single-phase three-way array structure power sensor is subordinate to the other power measurement system; the electric energy measuring system further comprises an error reference standard device, the error reference standard device is arranged on a pipeline branch of the electric energy sensor with the single-phase three-way array structure at the first 1 in 2 out, the error reference standard device is also arranged on a pipeline branch of the electric energy sensor with the single-phase three-way array structure at the second 1 in 2 out, and a switch is arranged on the selected pipeline branch; wherein, the pipeline branch into which the error reference standard device is connected in series is switched through the state of a setting switch so as to selectively connect the error reference standard device in series to the first 1-in 2-out single-phase three-way array structure electric energy sensor or the second 1-in 2-out single-phase three-way array structure electric energy sensor.

In the embodiment, the error calibration of the two independent 1-in 2-out single-phase three-way array structure electric energy sensors can be completed through one error reference standard device, and the normal work of each other is not influenced.

In other ways, a standard meter may also be incorporated into the power measurement system as an error reference standard. The setting manner of the error reference standard device is selected according to actual conditions, and is not particularly limited herein.

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

In this embodiment, the raw measurement data of the individual 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 a reference measurement error value of the electric energy sensor in the electric energy sensor of the single-phase three-way array structure with 1 inlet and 2 outlets in which the error reference standard device is positioned by utilizing a relative energy conservation relation.

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 a 1-in-2-out relation with the electric energy sensor which is 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 sensor of the single-phase three-way array structure corresponding to the 1-in-2-out relation of the upper stage or the lower stage by utilizing a relative energy conservation relation.

Step 14: and calculating the reference measurement error value process of the electric energy sensors in the single-phase three-way array structure with 1 inlet and 2 outlets by one or more times of the previous stage or the next stage to obtain the reference measurement error values of all the electric energy sensors in the electric energy measurement system, and compensating the original measurement data according to the reference measurement error value of each electric energy sensor to obtain equal error data or error-free data.

In this embodiment, the reference measurement error value is used to compensate the corresponding original measurement data, so as to obtain the equal error data of the reference error value of each electric energy 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.

When the error reference standard devices are arranged in different modes, the data calibration mode corresponding to the step 12 also has a difference.

When the second mode is adopted to set an error reference standard device or directly quote a standard meter as the error reference standard device, the measurement error of each electric energy sensor in the electric energy measurement system 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 measurement system is obtained based on the error reference standard device, and 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 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 measurement system, and error-free data can be obtained after the equal-error data needs 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 DeltaX 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 measuring system, and the compensated electric energy data of other electric energy sensors are 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 7:

fig. 10 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. 10, 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. 10 illustrates the connection by a bus as an example.

The memory 42 serves as a storage medium for storing a nonvolatile computer readable, and may be used to store a nonvolatile software program and a nonvolatile computer executable program, such as the measurement methods in embodiments 2 to 6. Processor 41 executes the measurement method by executing non-volatile software programs and instructions stored in memory 42.

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

It should be noted that, for the information interaction, execution process and other contents between the modules and units in the apparatus and system, the specific contents may refer to the description in the embodiment of the method of the present invention because the same concept is used as the embodiment of the processing method of the present invention, and are not described herein again.

Those of ordinary skill in the art will appreciate that all or part of the steps of the various methods of the embodiments may be implemented by associated hardware as instructed by a program, which may be stored on a computer-readable storage medium, which may include: a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and the like.

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A three-phase electric energy sensor with a three-way array structure is characterized in that the three-phase electric energy sensor with the three-way array structure comprises a 1-in 2-out or 2-in 1-out three-phase electric energy shunting structure, the three-phase electric energy shunting structure forms a three-phase electric energy system conforming to an electric energy conservation relation, electric energy sensing units are respectively arranged on pipelines of the 1-in 2-out or 2-in 1-out, a mathematical model is established according to the electric energy conservation relation in a mode of serially connecting error reference standard devices on any pipeline or in a mode of appointing the error reference standard devices, electric energy data collected by the electric energy sensing units and the error reference standard devices are utilized to complete calculation of measurement errors of the electric energy sensing units, and the three-phase electric energy shunting structure comprises 3 sets of single-phase three-way array junctions of the 1-in 2-out or the 2-in 1-out single-phase three-way array junctions which are relatively independent and are formed by single-phase electric energy sensing units of the A phase, the B phase and the C phase under a 3 meter method electric energy measurement method An electric energy sensor; or, the three-phase electric energy shunting structure comprises 2 sets of single-phase three-way array structure electric energy sensors which are formed by 2 sets of independent single-phase electric energy sensing units and are relatively independent, wherein the single-phase three-way array structure electric energy sensors are 2 sets of single-phase electric energy sensors with 1 inlet and 2 outlet or 2 inlet and 1 outlet, and any set of single-phase three-way array structure electric energy sensors is selected; wherein, the electric energy sensing unit concrete expression is each single-phase electric energy sensing unit, and is specific:

establishing a mathematical model by utilizing the power conservation relation of a power system, calculating power measurement errors of power sensing units respectively arranged on inlet and outlet pipelines of the single-phase three-way array structure power sensor through power data detected by the three-phase power distribution structure and the error reference standard device, compensating newly measured power data by utilizing the calculated errors, continuously and iteratively calculating the measurement errors of the power sensing units, and obtaining the single-phase power sensor of the three-way array structure power sensor without errors or the like;

2. The three-phase electric energy sensor with the three-way array structure according to claim 1, wherein the three-phase electric energy sensor with the three-way array structure is formed by 3 single-phase three-way array structure electric energy sensors to form 1 three-phase electric energy sensor with the three-way array structure with the 3-meter method, specifically:

each single-phase three-way array structure electric energy sensor with 1 in 2 out or 2 in 1 out forms a single-phase electric energy system which accords with the electric energy conservation relation, wherein single-phase electric energy sensing units are respectively arranged on the single-phase pipelines with 1 in 2 out or 2 in 1 out, a mathematical model is established according to the electric energy conservation relation by connecting a single-phase error reference standard device on any pipeline in series, the calculation of the measurement error of the single-phase electric energy sensing units is completed by utilizing the electric energy data collected by the single-phase electric energy sensing units and the single-phase error reference standard device, the measurement error of the single-phase electric energy sensing units with A, B, C three phases is respectively calculated, the phase-combining electric energy measurement error of the three-phase electric energy sensor with the three-way array structure is obtained by phase-combining calculation, and the newly measured three-phase electric energy data is compensated by the calculated phase-combining error, and continuously and iteratively calculating and compensating the measurement error of the electric energy sensing unit to obtain the three-phase electric energy sensor with the three-way array structure of the electric energy shunting structure without error or equal error.

3. The three-phase electric energy sensor with the three-way array structure according to claim 1, wherein the three-phase electric energy sensor with the three-way array structure is formed by 2 single-phase three-way array structure electric energy sensors to form 1 three-phase electric energy sensor with the three-way array structure with the 2-meter method, specifically:

1 single-phase three-way array structure electric energy sensor is connected with phase A current and phase AB voltage, the other 1 single-phase three-way array structure electric energy sensor is connected with phase C current and phase BC voltage, each single-phase 1-in 2-out or 2-in 1-out single-phase three-way array structure electric energy sensor forms a single-phase electric energy system which accords with the electric energy conservation relation, wherein single-phase electric energy sensing units are respectively arranged on the single-phase pipelines of 1-in 2-out or 2-in 1-out, a mathematical model is established according to the electric energy conservation relation by utilizing the electric energy data collected by the single-phase electric energy sensing units and the single-phase error reference standard device to complete the calculation of the measuring error of the single-phase electric energy sensing units, and the combined phase electric energy measuring error of the three-phase electric energy sensor of the three-way array structure is obtained by combined phase calculation after the measuring errors of the 2 single-phase electric energy sensing units are respectively calculated, and compensating newly measured three-phase electric energy data through the calculated phase-combining error, continuously and iteratively calculating and compensating the measurement error of the electric energy sensing unit, and obtaining the three-phase electric energy sensor with the three-way array structure of the electric energy shunting structure without error or equal error.

4. An electric power measuring system constituted by three-phase electric power sensors of a three-way array structure, comprising, in an electric power system provided with the three-phase electric power sensors of the three-way array structure of claim 1: the three-phase electric energy sensor comprises at least two stages of three-way array structures, wherein the three-phase electric energy sensor corresponding to each stage of three-way array structure comprises 1 electric energy sensing general meter unit positioned at an inflow side and 2 electric energy sensing sub meter units positioned at an outflow side; in a single-phase three-way array structure electric energy sensor, the electric energy of 1 electric energy sensing general meter unit and 2 electric energy sensing sub meter units form a relative electric energy conservation relation;

5. The electric energy measurement system formed by the three-phase electric energy sensors of the three-way array structure as claimed in claim 4, wherein the electric energy measurement system comprises n three-phase electric energy sensors of the three-way array structure, wherein every two three-phase electric energy sensors of the three-way array structure are independent;

6. The electric energy measuring system formed by the three-phase electric energy sensors with the three-way array structure according to claim 5, wherein the electric energy measuring system comprises at least 2 single-phase electric energy measuring error reference standard devices if a 2-meter electric energy measuring method is adopted, and the single-phase electric energy measuring error reference standard devices are connected in series with two single-phase electric energy sensors of any one three-phase electric energy sensor with the 2-meter three-way array structure of the electric energy measuring system; if the electric energy measuring system adopts a 3-meter method electric energy metering method, or comprises at least 3 single-phase error reference standard devices, wherein the 3 single-phase error reference standard devices are respectively connected in series on a branch of any one three-way array structure 3 single-phase electric energy sensors of the electric energy measuring system;

when the error reference standard device is arranged on a branch of the three-way array at the last stage 1, 2, an error reference value is transmitted in a mode of calculation from the lower level to the upper level, so that the electric energy measuring system is calibrated to obtain error-free data or equal error data;

7. The electric energy measurement system formed by the three-phase electric energy sensors of the three-way array structure as claimed in claim 5, wherein the electric energy measurement system comprises a microprocessor and a data transmission module, the microprocessor is connected with each three-phase electric energy sensor, the data transmission module is connected with the microprocessor and is used for error edge calculation of the three-phase electric energy sensors of the three-way array structure and/or is used for sending electric energy data collected from each three-phase electric energy sensor to a cloud server.

8. A measuring method of an electric energy measuring system composed of three-phase electric energy sensors of a three-way array structure is characterized in that the electric energy system composed of the three-phase electric energy sensors of the three-way array structure comprises the following steps: the three-phase electric energy sensor is of a three-way array structure with at least two stages of 1 in and 2 out, wherein the three-way array with each stage of 1 in and 2 out comprises an electric energy sensing total meter positioned at an inflow side and 2 three-phase electric energy sensor sub-meter units positioned at an outflow side, and the electric energy sensing total meter positioned at the inflow side and the 2 three-phase electric energy sensor sub-meter units positioned at the outflow side form a relative electric energy conservation relation;

the error checking method comprises the following steps:

9. The method for measuring a power measuring system composed of three-phase power sensors with a three-way array structure according to claim 8, wherein the step of compensating the raw measurement data according to the reference measurement error value of each power sensor unit to obtain equal error data or error-free data comprises:

10. The method for measuring an electric energy measuring system composed of three-phase electric energy sensors with a three-way array structure according to claim 9, wherein the Δ X deviation between the true error value and the reference error value of the error reference standard device is obtained by:

11. The method for measuring an electric energy measuring system composed of three-phase electric energy sensors with a three-way array structure according to claim 9, wherein an error reference standard device and a given reference error value are determined, and specifically:

12. The method of claim 9, wherein the error is referenced to a reference error value of a standard device, and comprises:

13. The method for measuring a power measuring system composed of three-phase power sensors of a three-way array structure according to claim 9, wherein the method for measuring a power measuring system composed of a three-way array structure further comprises:

14. The method of claim 8, wherein after the layout of the tee array in the power system and the calculation of the power measurement errors of the three-phase power sensors respectively disposed on the 1 inlet and 2 outlet lines are completed, the error of the power measurement device in the power system on the corresponding pipeline is continuously and iteratively calculated by using the measurement data obtained by correcting the errors in the tee array.