CN112557997A

CN112557997A - Mesh-shaped electric energy sensor system convenient for error checking and error checking method

Info

Publication number: CN112557997A
Application number: CN201910914781.8A
Authority: CN
Inventors: 侯飞; 侯铁信; 汪毅; 金鹏
Original assignee: Wuhan National Survey Data Technology Co ltd
Current assignee: Shenzhen Dianant Data Technology Co ltd
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2021-03-26
Anticipated expiration: 2039-09-26
Also published as: CN112557997B

Abstract

The invention discloses a reticular electric energy sensor system convenient for error checking and an error checking method, the reticular electric energy sensor system comprises: the electric energy arrays of the multistage 1 in and n out comprise an electric energy sensor total meter positioned at an incoming line side and n electric energy sensor branch meters positioned at an outgoing line side, and the electric energy sensor total meter positioned at the incoming line side and the n electric energy sensor branch meters positioned at the outgoing line side form a relative energy conservation relation; aiming at the electric energy arrays of the adjacent two stages of 1 in and n out, the electric energy sensor branch meter positioned on the wire outlet side in the electric energy array of the previous stage 1 in and n out is an electric energy sensor general meter positioned on the wire inlet side in the electric energy array of the next stage 1 in and n out. In the invention, the data calculation scale can be reduced through the 1-in/n-out electric energy array, the multiple collinearity influence on electric energy data calculation caused by similar habits of using electric energy by users is weakened, and the calculation efficiency and the calculation precision are improved.

Description

Mesh-shaped electric energy sensor system convenient for error checking and error checking method

Technical Field

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

Background

At present, a large amount of electric energy sensors used cannot be disassembled into laboratories to detect electric energy errors because the amount of the electric energy sensors used in real life is too large. There is a need to find techniques and methods for online detection of errors in these power sensors;

for mathematical algorithms, when a mesh-shaped electric energy sensor system is large, a plurality of electric energy sensors are included in the mesh-shaped electric energy sensor system, the similarity of electric energy consumption habits of users can derive a multiple co-linearity problem of electric energy meter data, and the calculation accuracy of the data calculation method is influenced.

Conventionally, a power sensor is installed on a pipeline or a node of a measured mesh power sensor system, power at each point is measured, and a measurement error of each power sensor is separately checked as needed. The method has the problems of huge workload and high cost of error checking of the electric energy sensor.

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 mesh-shaped electric energy sensor system convenient for error checking and an error checking method aiming at solving the technical problem of multiple collinearity of electric energy data, wherein the mesh-shaped electric energy sensor system with any scale can be constructed by a 1-in n-out electric energy array, the mesh-shaped electric energy sensor system with a larger scale can be divided into a plurality of electric energy arrays with smaller scales by the 1-in n-out electric energy array, each electric energy array meets the relative energy conservation law, the error of an electric energy sensor in each electric energy array is respectively calculated, the multiple collinearity influence of electric energy data calculation caused by similar habits of using electric energy by users is weakened, and the calculation efficiency and the calculation precision are improved.

To achieve the above objects, according to one aspect of the present invention, there is provided a mesh power sensor system for facilitating error checking, the mesh power sensor system having a pipeline with power sensors constructed in a structure in which a plurality of subsystems for facilitating error calculation are aggregated, comprising: the method comprises the following steps that a plurality of electric energy meters and multi-stage 1-in-n-out electric energy arrays are used, and a power supply and utilization network topological relation between an object to be measured and a power supply is constructed through the electric energy meters and the 1-in-n-out electric energy arrays;

the electric energy array at the inlet and the outlet of each stage 1 comprises an electric energy sensor total meter at the inlet side and n electric energy sensor branch meters at the outlet side, and the electric energy sensor total meter at the inlet side and the n electric energy sensor branch meters at the outlet side form a relative energy conservation relation;

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

the electric energy meter is used as a master meter of an electric energy sensor at the top stage in the 1 in-out and n-out electric energy array, and/or the electric energy meter is used as a slave meter of an electric energy sensor at the last stage in the 1 in-out and n-out electric energy array;

at least part of the electric energy sensor sub-meters in the last stage 1 in-out electric energy array are used for being connected with the object to be measured, or the electric energy sensor general meter in the uppermost stage 1 in-out electric energy array is used for being connected with the object to be measured, or at least part of the electric energy sensor sub-meters in the middle stage 1 in-out electric energy array are used for being connected with the object to be measured.

Preferably, the power sensor includes any one of a voltage sensor, a current sensor, a shunt, or an electric power sensor.

Preferably, the 1 in n out power array is a 1 in 2 out power array, each stage of the 1 in 2 out power array includes a power sensor bus located at the incoming line side and 2 power sensor sub-meters located at the outgoing line side, and one power sensor bus located at the incoming line side and 2 power sensor sub-meters located at the outgoing line side form a relative energy conservation relation.

Preferably, the meshed electric energy sensor system further comprises an error reference standard device, and the error reference standard device is connected in series on a branch where any electric energy sensor is located;

when the error reference standard device is arranged on a branch of the electric energy array which is input and output at the last stage 1, transmitting an error reference value in a mode of progressively calculating from a lower stage to an upper stage so as to calibrate the mesh-shaped electric energy sensor system to obtain error-free data or equal error data;

when the error reference standard device is arranged on a branch of the power array which is at the top level 1 and goes in and out of n, transmitting an error reference value in a mode of progressively calculating from the upper level to the lower level so as to calibrate the mesh-shaped power sensor system and obtain error-free data or equal error data;

when the error reference standard device is arranged on a branch of the electric energy array which is input into or output from the middle stage 1, an error reference value is transmitted in a mode of calculation from the middle stage to the upper stage and in a mode of calculation from the middle stage to the lower stage, so that the mesh-shaped electric energy sensor system is calibrated to obtain error-free data or equal error data.

Preferably, the mesh power sensor system comprises a first 1 in n out power array and a second 1 in n out power array, wherein the first 1 in n out power array and the second 1 in n out power array are independent of each other;

the meshed electric energy sensor system also comprises an error reference standard device, the error reference standard device is arranged on a pipeline branch of the first 1 in n out electric energy array, the error reference standard device is also arranged on a pipeline branch of the second 1 in n out electric energy array, and a switch is arranged on the selected pipeline branch;

wherein a pipeline branch into which the error reference standard device is connected in series is switched by setting a state of a switch to selectively connect the error reference standard device in series to the first 1 in n out power array or the second 1 in n out power array.

Preferably, the mesh-shaped power sensor system comprises a microprocessor and a data transmission module, the microprocessor is connected with each power sensor, and the data transmission module is connected with the microprocessor and used for sending the power data collected by the microprocessor from each power sensor to a cloud server.

According to another aspect of the present invention, there is provided an error checking method of a mesh power sensor system, the mesh power sensor system including: the method comprises the following steps that a plurality of electric energy meters and multi-stage 1-in-n-out electric energy arrays are used, and a power supply and utilization network topological relation between an object to be measured and a power supply is constructed through the electric energy meters and the 1-in-n-out electric energy arrays;

the error checking method comprises the following steps:

in the mesh-shaped electric energy sensor system, an electric energy array with a 1-in-n-out topological relation is determined, an error reference standard device is appointed or established in the electric energy array with the 1-in-n-out topological relation, and a reference error value is given to the error reference standard device;

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

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

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

calculating the reference measurement error values of the electric energy sensors in the electric energy array with 1 in and n out through one or more times of the previous stage or the next stage to obtain the reference measurement error values of all the electric energy sensors in the electric energy array with the 1 in and n out relation;

and calculating reference measurement error values of other electric energy sensors in topological relation with the electric energy sensors in 1 in n out by taking the electric energy sensors in 1 in n out as reference standards, thereby obtaining the reference measurement error values of all the electric energy sensors in the mesh-shaped electric energy sensor 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.

Preferably, the compensating the raw measurement data according to the reference measurement error value of each electric energy sensor to obtain equal error data or error-free data includes:

compensating the corresponding original measurement data by using the reference measurement error value to obtain equal error data of the reference error value of each electric energy sensor relative to the error reference standard device; when delta X deviation exists between a real error value and a reference error value of the error reference standard device, compensating equal error data of each corresponding electric energy sensor by utilizing the delta X deviation to obtain error-free data; alternatively, the first and second electrodes may be,

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

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

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

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

a first electric energy sensor with a known real error value is connected in series on a branch circuit where any one electric energy sensor of the mesh-shaped electric energy sensor system is located;

respectively reading the electric energy data of the first electric energy sensor and the electric energy data of the electric energy sensor on the selected branch in the operation process of the mesh-shaped electric energy sensor system, and calculating the real error value of the electric energy sensor on the selected branch;

the power sensors on the selected branch act as error reference criteria and the true error value for each connected power sensor in the networked power sensor system is calculated using the calculated true error values for the power sensors on the selected branch.

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

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

Preferably, the error checking method further includes:

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

if the similarity of at least two groups of original measurement data is greater than a preset similarity threshold, the measurement errors of the electric energy sensors are calculated in a cascade mode in a grading calculation mode so as to verify the original measurement data;

if the similarity of each group of original measurement data is smaller than a preset similarity threshold, the electric energy sensors in the electric energy array at the last stage 1 in and n out are divided into sub-meters, and the electric energy sensors in the electric energy array at the top stage 1 in and n out are summed up to obtain the measurement errors of the corresponding electric energy sensors by utilizing the relative energy conservation relation, so as to check the original measurement data.

Generally, compared with the prior art, the technical scheme of the invention has the following beneficial effects: the invention provides a reticular electric energy sensor system and an error checking device convenient for error checking, the reticular electric energy sensor system provided by the invention comprises at least two stages of 1-in n-out electric energy arrays, wherein the 1-in n-out electric energy arrays not only can construct a reticular electric energy sensor system with any scale, but also can divide the reticular electric energy sensor system with a larger scale into a plurality of electric energy arrays with smaller scales through the 1-in n-out electric energy arrays, each electric energy array meets the relative energy conservation law, the error of an electric energy sensor in each electric energy array is respectively calculated, the multiple collinearity influence of electric energy data calculation caused by similarity of habits of using electric energy by users is weakened, and the calculation efficiency and the calculation accuracy 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. 1a is a schematic structural diagram of a mesh power sensor system according to an embodiment of the present invention;

FIG. 1 is a schematic diagram of a mesh power sensor system for facilitating error verification according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of another embodiment of a mesh power sensor system for facilitating error verification in accordance with the present invention;

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

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

FIG. 5 is a schematic structural diagram of another electricity meter box provided by the embodiment of the invention;

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

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

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

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

FIG. 10 is a schematic diagram of a mesh power sensor system and power sensing with a known Δ X bias according to an embodiment of the present invention;

FIG. 11 is a schematic diagram of a mesh power sensor system according to an embodiment of the present invention, with a known Δ X offset;

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

Detailed Description

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

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

The reticular electric energy sensor system of the invention is characterized in that: the mesh power sensor system may be equivalently considered as an integrated system composed of a plurality of power sensors and/or a plurality of mesh power sensor devices (wherein the minimum-granularity constituent units of the mesh power sensor device also include power sensors), and for each power sensor included in the mesh power sensor device, the mesh power sensor device has a processor for collectively processing detection data of its associated power sensor. For example, in the mesh power sensor system, at least two stages of power arrays in a 1-in-n-out topological relationship exist, and at least two stages of power arrays in a 1-in-m-out topological relationship also exist, where n and m have different values, for example, in the mesh power sensor system, at least two stages of power arrays in a 1-in-2-out topological relationship exist, and at least one stage of power arrays in a 1-in-4-out topological relationship also exists, as shown in fig. 1a, that is, the mesh power sensor system is a hybrid system of power arrays in a 1-in-n-out topological relationship and power arrays in a non-1-in-n-out topological relationship.

The electric energy sensor can be integrated with the mesh-shaped electric energy sensor device, for example, when the mesh-shaped electric energy sensor device is applied to the field of electric automobiles, each electric energy sensor integrated in the mesh-shaped electric energy sensor device can be used for detecting one or more of an exterior lamp, an interior lamp, an engine, an air conditioner, a central control assembly and a wiper; in addition, there is also a typical example scenario, for example, when the mesh-type power sensor device is applied to a home environment, at this time, each power sensor integrated in the mesh-type power sensor device may be used for detecting, primary-lying power consumption, secondary-lying power consumption, hall power consumption, kitchen power consumption, and the like, and even, the power sensors of the mesh-type power sensor device may be arranged in a one-to-one correspondence with different wiring boards, so as to perform centralized management and control on power consumption of electrical appliances connected to different wiring boards. Besides the integration methods listed above, the power sensor may be used in combination with the mesh power sensor device in a separate manner, for example, the mesh power sensor device is applied to a building electrical meter box, and is detected by the power sensors (including voltage transformers and/or current transformers) correspondingly disposed outside the mesh power sensor device and fed back to a processor in the mesh power sensor device, so that the obtaining of the real error of each power sensor is completed by the using method of the mesh power sensor device proposed by the present invention or by the mesh power sensor system proposed by the present invention, and finally it is ensured that the power data output by the mesh power sensor device corresponding to each power sensor (i.e. household) is error-free data (i.e. data calibrated by the real error), in this case, the power sensor may be separately installed outside the mesh-type power sensor device, and have respective wireless transmission modules, and establish a wireless path with the data transmission module in the mesh-type power sensor device through the wireless transmission module, and transmit the detected metering data to the processor in the mesh-type power sensor device through the wireless path.

The present invention relates to a power sensor connected to a mesh power sensor device, and a power sensor in a mesh power sensor system, which generally refers to a device for measuring a flow rate flowing through a branch, and includes various types, for example, a voltage sensor or a current sensor, according to different usage scenarios. The original measurement data measured by the electric energy sensor of the invention has measurement error; wherein, in the case that an error standard device is selected and a reference error value is configured for the error standard device, the calculated measurement error is described as a reference measurement error.

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

The equal error data according to the present invention means: for any sensor with errors, after the measurement error of the sensor is detected, the detected error value is used for carrying out error calibration processing on the original measurement data (the original measurement data has errors) of the sensor, and the errors of all the obtained calibrated electric energy data are equal to the errors caused by the detection error method. These calibrated power data are referred to as "equal error" data. The "equal error" is equal to the error value of the error reference standard itself (also described as Δ X deviation in embodiments of the invention). Under the concept of equal error, after error calibration processing, the measurement error of each electric energy data of the sensing system is the same. The equal error concept is an effective theory which is put forward by the inventor after years of research in the field of sensing systems.

The error-free data of the invention refers to: for any equal error data, when its "equal error" is measured and calibrated, the obtained data is the error-free data. Considering that it is theoretically impossible to have absolute error-free data, it can be said in other words that error-free data is data with no or negligible errors.

Example 1:

at present, when the scale of a mesh-shaped electric energy sensor 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, the calculation efficiency is reduced, and the calculation accuracy of the data calculation method is influenced. In order to solve the foregoing problems, in an embodiment, a mesh-type power sensor system convenient for error calibration is provided, where in actual use, the mesh-type power sensor system with a pipeline of power sensors is configured as a structure of a plurality of subsystems convenient for error calculation, the mesh-type power sensor system includes a plurality of power meters and a multistage 1 in/n out power array, and a power supply and utilization network topology relationship between an object to be measured and a power supply is established through the power meters and the 1 in/n out power arrays; the 1-in n-out electric energy array can not only construct a mesh electric energy sensor system of any scale, but also divide the mesh electric energy sensor system with a large scale into a plurality of electric energy arrays with a small scale through the 1-in n-out electric energy array, each electric energy array meets the relative energy conservation law, errors of electric energy sensors in each electric energy array are calculated respectively, and the multiple collinearity problem of electric energy data can be effectively reduced.

As shown in fig. 1a, the electric energy meter is used as a master meter of an electric energy sensor at the top stage in the 1 in/n out electric energy array, and/or the electric energy meter is used as a slave meter of an electric energy sensor at the last stage in the 1 in/n out electric energy array. In a practical application scenario, the electric energy measurement is mainly completed through a sensor in the 1 in-n out electric energy array, the 1 in-n out electric energy array can be an independent product in product form, and a terminal is reserved on the 1 in-n out electric energy array and is used for being connected with an external electric energy meter to construct a mesh electric energy sensor system of any scale. The electric energy meter referred to above mainly refers to a conventional electric energy meter.

At least part of the electric energy sensor sub-meters in the last stage 1 in-out electric energy array are used for being connected with the object to be measured, or the electric energy sensor general meter in the uppermost stage 1 in-out electric energy array is used for being connected with the object to be measured, or at least part of the electric energy sensor sub-meters in the middle stage 1 in-out electric energy array are used for being connected with the object to be measured. Wherein, the middle level refers to a 1 in n out power array excluding any one of the last level and the uppermost level.

In this embodiment, the electric energy sensor connected to the object to be measured is mainly used to obtain electric energy data of the sensor to be measured, and other electric energy sensors not directly connected to the sensor to be measured are mainly added in an appropriate amount to complete measurement of the object to be measured, so that the error calculation speed can be increased.

In the present embodiment, the mesh power sensor system is suitable for a dc power system, and also suitable for an ac power system (for example, an ac power system of 50HZ to 60 HZ), and also suitable for a hybrid ac/dc power system, where the ac power system includes a single-phase ac power system and also includes a three-phase ac power system. Wherein, the electric energy system is suitable for any voltage system. 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.

The meshed electric energy sensor system has in-phase networking capability, the objects to be measured are distributed in the same phase path of the three-phase system, a branch capable of being connected exists between the first meshed electric energy sensor system and the second meshed electric energy sensor system, and the first meshed electric energy sensor system is provided with an error reference standard device; the first netted electric energy sensor system and the second netted electric energy sensor system are provided with connecting terminals, and the first netted electric energy sensor system and the second netted electric energy sensor system are connected through the connecting terminals so as to construct a new 1-in-n-out electric energy array and provide a transmission line for an error reference standard device.

The mesh-shaped electric energy sensor system has the cross-phase networking capability, the object to be measured is distributed on a first phase path and a second phase path of a three-phase system, a multi-phase electric energy general meter is arranged at the input ends of the first phase path and the second phase path, the electric energy sensors in the first phase path and the second phase path are used as electric energy sensor branch meters, and the electric energy sensors and the multi-phase electric energy general meter form a new 1-input-n-output electric energy array; the first phase circuit and the second phase circuit are provided with switches, and the electric energy sensors on the first phase circuit and the second phase circuit are enabled to operate under the same voltage by switching the states of the switches, so that cross-phase transmission of an error reference standard device is realized, and the calculation of errors is completed;

and after the error calculation is finished, switching the state of the switch to enable each electric energy sensor to work under the voltage of the phase circuit where the electric energy sensor is located.

Please see the following description for the arrangement of the error reference standard device.

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

For the electric energy arrays of the two adjacent stages of 1 in and n out, the electric energy sensor branch meter positioned on the outgoing line side in the electric energy array of the previous stage of 1 in and n out is an electric energy sensor general meter positioned on the incoming line side in the electric energy array of the next stage of 1 in and n out.

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

The electric energy sensor comprises any one of a voltage sensor, a current divider or an electric power sensor, and the electric energy sensor can also be a combination of a current-voltage transformer and an electric energy meter. The voltage sensor can be a low-voltage electric energy meter or a high-voltage electric energy meter.

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

In a practical application scenario, the 1-in-2-out power array is the simplest 1-in-n-out power array with n being 2, and is a 1-in-2-out power pipeline system with a power sensor. Theoretically, a plurality of 1-in 2-out power arrays can be used to form a mesh power sensor system capable of meeting any customer requirements, the power of the mesh power sensor system can be realized through each 1-in 2-out power array, and the power sensor can calculate through the 1-in 2-out power array. The greatest technical advantage of a 1 in 2 out power array is that it minimizes the effects of multiple collinearity problems with power data.

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

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

For a mesh power sensor system with 1 inflow line and n outflow lines, the power conforms to the relative conservation of energy 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 the data for not less than n times through calculation when any one of the electric energy sensors is a known quantity.

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

w′₀＝w₀(1+x₀)

w′_i＝w_i(1+x_i)

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

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

Specifically, when the error reference standard device is arranged on a branch of the electric energy array which is at the last stage 1, in and out, the error reference value is transmitted in a mode of calculation from the lower stage to the upper stage, so as to calibrate the mesh-shaped electric energy sensor system, and obtain error-free data or equal error data; when the error reference standard device is arranged on a branch of the power array which is at the top level 1 and goes in and out of n, an error reference value is transmitted in a mode of calculation from the upper level to the lower level, so that the mesh-shaped power sensor system is calibrated, and error-free data or equal error data are obtained. In a preferred embodiment, the error reference standard device may be disposed at the middle stage, so that the calibration may be performed from the middle stage to both ends, and the calculation efficiency may be improved, specifically, when the error reference standard device is disposed on the branch of the power array at the input and output of the middle stage 1, the error reference value is transmitted by means of calculation from the middle stage to the upper stage, and by means of calculation from the middle stage to the lower stage, so as to calibrate the mesh power sensor system, and obtain error-free data or equal error data.

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

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

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

Specifically, the mesh power sensor system comprises a first 1 in n out power array and a second 1 in n out power array, wherein the first 1 in n out power array and the second 1 in n out power array are independent of each other;

the meshed electric energy sensor system also comprises an error reference standard device, the error reference standard device is arranged on a pipeline branch of the first 1 in n out electric energy array, the error reference standard device is also arranged on a pipeline branch of the second 1 in n out electric energy array, and a switch is arranged on the selected pipeline branch; wherein a pipeline branch into which the error reference standard device is connected in series is switched by setting a state of a switch to selectively connect the error reference standard device in series to the first 1 in n out power array or the second 1 in n out power array.

For example, the corresponding circuit structure design can refer to fig. 3, and the pipeline switching is performed by controlling the on/off of the corresponding switch. As shown in fig. 3, taking the 1 in 2 out power array as an example for explanation, the first 1 in 2 out power array and the second 1 in 2 out power array are independent from each other, the error reference standard device is connected in series to one of the pipeline branches of the first 1 in 2 out power array and the second 1 in 2 out power array, a switch K1 is arranged on the pipeline branch of the first 1 in 2 out power array, a switch K1 is connected in parallel to the error reference standard device, a switch K1 and the error reference standard device are both connected in series to the power sensor on the selected branch, and a switch K2 is arranged between the error reference standard device and the power sensor on the selected branch; meanwhile, a switch K3 is arranged on a pipeline branch of the second 1 inlet and 2 outlet electric energy array, a switch K3 is connected with the error reference standard device in parallel, the switch K3 and the error reference standard device are connected with the electric energy sensor on the selected branch in series, and a switch K4 is arranged between the error reference standard device and the electric energy sensor on the selected branch. The switches K1-K4 can be switch channels of relays, and the relays control the on-off of the corresponding switches K1-K4.

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

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

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

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

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

Further, the mesh-shaped electric energy sensor system comprises a microprocessor and a data transmission module, wherein the microprocessor is connected with each electric energy sensor, and the data transmission module is connected with the microprocessor and used for sending 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.

The data transmission module can transmit data inside the mesh-shaped electric energy sensor system and also can transmit data corresponding to the mesh-shaped electric energy sensor system to the outside;

the microprocessor has data processing capacity and can process data based on edge computing or cloud computing;

the data corresponding to the mesh-shaped electric energy sensor system can be stored in a local memory or uploaded to a cloud server for storage.

In practical application scenarios, the calculation and compensation of the power error inside the mesh power sensor system is continuous and is accompanied with the whole life cycle of the mesh power sensor system product.

In an actual application scene, the mesh-shaped electric energy sensor can form an integrated device, and the electric energy sensor, the data transmission module and the microprocessor are integrated into a whole to form a mesh-shaped electric energy sensor type multi-user electric energy meter; the multi-user electric energy meter has networking capability, and is an error check-free multi-user electric energy meter.

With reference to the above embodiments, the mesh-type electric energy sensor system provided by the present invention includes at least two stages of 1 in and n out electric energy arrays, wherein the 1 in and n out electric energy arrays can not only construct mesh-type electric energy sensor systems of any scale, but also divide the mesh-type electric energy sensor system with a larger scale into a plurality of electric energy arrays with a smaller scale through the 1 in and n out electric energy arrays, each electric energy array satisfies the relative energy conservation law, respectively calculates the error of the electric energy sensor in each electric energy array, reduces the multiple collinearity influence faced by calculation of electric energy data due to similar habits of using electric energy by users, and improves the calculation efficiency and calculation accuracy.

Example 2:

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

In addition, the expanded connection can be carried out through the 1-in n-out electric energy array, and the method for cascading and expanding the mesh electric energy sensor system comprises the following steps: the 2 electric energy arrays with 1 in and n out are cascaded to construct a net-shaped electric energy sensor system capable of measuring the electric energy sensor error, specifically, 1 in the electric energy array with 1 in and n out of the lower level is connected to the electric energy array with 1 in and n out of the upper level (the error is yet to be calculated) to become a part of n, and 2 electric energy arrays with 1 in and n out are connected to form 1 new net-shaped electric energy sensor system, wherein the error value of all the electric energy sensors can be obtained through calculation.

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

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

In this embodiment, a minimum mesh-shaped electric energy sensor system can be constructed by the electric energy arrays in and out of 1, the scale of the mesh-shaped electric energy sensor system is reduced as much as possible, multiple collinear influences of electric energy data calculation caused by similar habits of using electric energy by users are weakened, and the error calculation accuracy of the electric energy sensor is improved.

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

With reference to fig. 4, a product form of an electricity meter box is shown, an electric energy sensor can be specifically a sampling resistor, the electricity utilization condition of a user is obtained through the sampling resistor, wherein the sampling resistor (sub-meter) of an electric energy array of last stage 1 in 2 out is used for being coupled with a line of the user, the electricity utilization condition of the user is detected, the sampling resistors of the electric energy array of other stage 1 in 2 out are all integrated and arranged in a meter calibrating device, a large-scale power supply system is divided into a plurality of small power supply systems, the meter calibrating device can calibrate the meter in a grading manner when calibrating the meter, the data processing amount of each time is reduced, the calculation efficiency can be improved, and multiple collinearity influences faced by calculation of electric energy data caused by habitual similarity of electric energy used by the user can be weakened.

In combination with fig. 5, another product form of an electric meter box is shown, the electric energy sensor can be specifically a sampling resistor, the electricity utilization condition of a user is obtained through the sampling resistor, wherein the sampling resistor (sub-meter) of the electric energy array of the last stage 1 in and 2 out is used for being coupled with a line of the user, the electricity utilization condition of the user is detected, the sampling resistors of the electric energy array of the other stage 1 in and 2 out are all integrally arranged in a meter calibrating device, in addition, the electric meter box further comprises a user electric meter, and the user electric meter is connected with the sampling resistor located at the most end, so that the electricity utilization of the user is displayed. So divide large-scale power supply system into a plurality of little power supply systems, the school table ware can carry out the school table in grades when carrying out the school table, has reduced the data handling volume at every turn, can promote computational efficiency, moreover, can weaken the multiple collinearity influence that the custom similarity that the user used the electric energy caused electric energy data to calculate to face.

The ammeter case that figure 5 demonstrates has set up the user ammeter in user's side, and the user ammeter is used for showing user's power consumption ability, and the user can learn its power consumption ability condition through the electric energy display of user ammeter, and to a certain extent, provides the convenience for the user. However, at present, the user electric meter is generally arranged at a fixed position of a building, and the user generally cannot see the display of the user electric meter, that is, the display function of the electric meter box in the form of fig. 5 is generally not used, and the electric meter box shown in fig. 4 can be popularized to reduce the cost while the electric energy detection function is ensured.

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

Example 3:

in combination with the mesh power sensor system of the above embodiments, the present embodiment provides an error checking method of the mesh power sensor system, the mesh power sensor system includes: the electric energy array comprises at least two stages of 1 in-out electric energy arrays, wherein each stage of 1 in-out electric energy array comprises an electric energy sensor total meter positioned on an incoming line side and n electric energy sensor sub meters positioned on an outgoing line side, and the electric energy sensor total meter positioned on the incoming line side and the n electric energy sensor sub meters positioned on the outgoing line side form a relative energy conservation relation; the electric energy sensor sub-meter positioned on the outgoing line side in the electric energy array which is fed in and out at the previous stage 1 is an electric energy sensor general meter positioned on the incoming line side in the electric energy array which is fed in and out at the next stage 1, aiming at the electric energy arrays which are fed in and out at the two adjacent stages 1; the mesh-shaped electric energy sensor system also comprises an electric energy array with 1 inlet and m outlet, wherein the electric energy array with 1 inlet and m outlet and the electric energy array with one stage of 1 inlet and n outlet have a network topology relationship between a general meter and a sub meter, and the values of m and n are different.

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

step 10: in the mesh-type power sensor system, the power arrays with the 1 in-out topological relation are determined, and an error reference standard device is appointed or established in the power arrays with the 1 in-out topological relation and is endowed with a reference error value.

In an actual application scenario, in the mesh-shaped electric energy sensor system, the connection relationships among most electric energy sensors form an electric energy array in a 1-in-n-out topological relationship, and the connection relationships among only a few electric energy sensors form an electric energy array in a 1-in-m-out topological relationship, that is, the number of stages of the electric energy array with the 1-in-n-out topological relationship is greater than that of the electric energy array with the 1-in-m-out topological relationship, and the value of m is greater than n. Under the condition, the electric energy sensor with the 1 in-n out topological relation can be searched as a breakthrough, the error of the electric energy sensor with the 1 in-n out topological relation is preferentially calculated (the calculation speed is high, and the colinearity problem can be well eliminated), and then the electric energy sensor with the 1 in-n out topological relation is used as a known object to calculate the error of other electric energy sensors.

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 any one of the electrical energy sensors in the mesh electrical energy sensor system as the error reference standard device, and obtaining a Δ X deviation between an actual error value of the error reference standard device and the reference error value, as shown in fig. 7, specifically includes:

step 1111: the selected power sensor is removed from the networked power sensor system and an actual error value of the selected power sensor is measured.

Referring to fig. 1, the mesh-type power sensor system includes a large number of power sensors, where each stage of 1 n-in and n-out power arrays includes (n +1) power sensors, where one power sensor general meter is used to measure incoming line energy, n power sensor sub meters are used to measure branching line energy, and the (n +1) power sensors form a correct network topology relationship, and whether the network topology relationship is correct or not can be determined according to a correlation method.

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

Step 1112: subtracting the reference error value of the selected power sensor from the actual error value of the selected power sensor to obtain the Δ X offset.

In an alternative embodiment, a numerical value is automatically designated as the error designated value according to an actual situation, or a numerical value is selected from a standard measurement error interval as the designated value. The specified value may be different from the actual measurement error of the electric energy sensor, and the measurement error of the electric energy sensor cannot be truly reflected. And the difference value of the error designated value of the error reference standard device and the error value of the error reference standard device is equal to the delta X deviation.

The second method comprises the following steps: by using a series standard method, the error reference standard determining device is specifically configured to connect a first electric energy sensor with a known actual error value in series with a branch where any one electric energy sensor in the mesh-like electric energy sensor system is located, and then calculate to obtain a reference measurement error of each electric energy sensor in the mesh-like electric energy sensor system, as shown in fig. 8, the specific mesh-like electric energy sensor system includes:

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

Step 1122: the power sensors on the selected branch act as error reference criteria and the true error for each power sensor in the networked power sensor system is calculated using the calculated actual error values for the power sensors on the selected branch.

Compared with the first method, the second method is more suitable for example scenarios of specific applications, but in the implementation process of the second method, it is also recommended to set an interface for the first power sensor to intervene in a certain branch or multiple branches of the existing mesh-like power sensor system.

The third method comprises the following steps: by adopting a cascade computing and transmitting method, if the meshed electric energy sensor system and the adjacent first meshed electric energy sensor system and/or the second meshed electric energy sensor 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 meshed electric energy sensor system and/or the second meshed electric energy sensor 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 mesh electric energy sensor 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 mesh electric energy sensor system and each electric energy sensor in the adjacent first mesh electric energy sensor system and/or the second mesh electric energy sensor system.

Referring to fig. 10, the mesh power sensor system to be calibrated includes a multistage 1 in n out power array, the first mesh power sensor system also includes a multistage 1 in n out power array, the mesh power sensor system to be calibrated and the first mesh power sensor system belong to a mesh power sensor system Y (wherein, the mesh power sensor system Y can be understood as a second mesh power sensor system, usually observed from a larger range of mesh power sensor systems), and the power sensor 0 at the highest stage in the mesh power sensor system to be calibrated and the power sensor 0 'at the highest stage in the first quasi-mesh power sensor system form a topological relationship between the master meter and the slave meter with the power sensor m in the mesh power sensor system Y, and the power sensor (for example, the power sensor n') with known actual error in the first mesh power sensor system can be selected as an error parameter According to standard devices. Correspondingly, the relationship among the first mesh power sensor system, the mesh power sensor system Y and the mesh power sensor system can also be as shown in fig. 11, that is, the first mesh power sensor system can be represented as a single power sensor 1'.

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

In this embodiment, according to the neighboring mesh power sensor system with the known actual error value, the power sensor having the actual error value in the neighboring mesh power sensor system is 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 power sensor in the mesh power sensor system to be measured can be calculated under a relatively second power conservation environment that can be established based on the mesh power sensor system to be measured and the neighboring first mesh power sensor system and/or the second mesh power sensor 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 also puts higher demands on the architectural relationship, data sharing and computing capability of each mesh power sensor system in the current environment.

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

Specifically, the meshed electric energy sensor system comprises a first 1 in n out electric energy array and a second 1 in n out electric energy array, wherein the first 1 in n out electric energy array and the second 1 in n out electric energy array are independent from each other, namely, the first 1 in n out electric energy array is subordinate to one meshed electric energy sensor system, and the second 1 in n out electric energy array is subordinate to the other meshed electric energy sensor system; the meshed electric energy sensor system also comprises an error reference standard device, the error reference standard device is arranged on a pipeline branch of the first 1 in n out electric energy array, the error reference standard device is also arranged on a pipeline branch of the second 1 in n out electric energy array, and a switch is arranged on the selected pipeline branch; wherein a pipeline branch into which the error reference standard device is connected in series is switched by setting a state of a switch to selectively connect the error reference standard device in series to the first 1 in n out power array or the second 1 in n out power array.

In the embodiment, the error calibration of two independent 1-in-n-out power arrays can be completed through one error reference standard device, and the normal work of each other is not influenced.

In other ways, a calibration gauge may also be incorporated into the meshed power sensor system as an error reference calibration device. 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 raw measurement data of the electric energy sensors on all the input branches and all the output branches in the reticular electric energy sensor system and the raw measurement data of the error reference standard device.

In this embodiment, the raw measurement data of the individual power sensors may be automatically collected by the concentrator and transmitted to the database server. Wherein, because the electric energy sensor has the error, correspondingly, the raw measurement data has the error.

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

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

Step 13: and acquiring an electric energy array which is in an in-n-out relation with the electric energy sensor which is calculated to obtain the reference measurement error value at the previous stage or the next stage 1, and calculating to obtain the reference measurement error value of the electric energy sensor in the electric energy array corresponding to the in-n-out relation at the previous stage or the next stage 1 by utilizing the relative energy conservation relation. Step 14: and calculating the reference measurement error values of the electric energy sensors in the electric energy array with 1 in and n out through one or more times of the previous stage or the next stage to obtain the reference measurement error values of all the electric energy sensors in the electric energy array with the 1 in and n out relation.

In this embodiment, the reference measurement error values of the electric energy sensors in all the electric energy arrays with 1 in and n out are sequentially calculated in a cascade calculation manner.

Step 15: and calculating reference measurement error values of other electric energy sensors in topological relation with the electric energy sensors in 1 in n out by taking the electric energy sensors in 1 in n out as reference standards, thereby obtaining the reference measurement error values of all the electric energy sensors in the mesh-shaped electric energy sensor 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, after the reference measurement errors of all the electric energy sensors in the 1 in n out relationship are calculated, the other electric energy sensors (the sensor is not dependent on the electric energy array in the 1 in n out relationship) having the power utilization topological relationship with the electric energy sensors in the 1 in n out relationship are determined, the reference measurement error values of the other electric energy sensors are calculated by using the electric energy sensors in the 1 in n out relationship as known objects (which can be understood as error reference standards), so as to obtain the reference measurement error values of all the electric energy sensors in the mesh electric energy sensor system, and the raw measurement data is compensated according to the reference measurement error value of each electric energy sensor, so as to obtain equal error data or error-free data.

In this embodiment, the reference measurement error value is used to compensate the corresponding original measurement data, so as to obtain the equal error data of the reference error value of each electric energy sensor relative to the error reference standard device; when delta X deviation exists between a real error value and a reference error value of the error reference standard device, compensating equal error data of each corresponding electric energy sensor by utilizing the delta X deviation to obtain error-free data; alternatively, the first and second electrodes may be,

In the embodiment of the present invention, in order to improve the accuracy of the calculation, a line loss parameter variable may be further provided, but for indirect consideration of description, the line loss parameter variable is not introduced in the following detailed description process. Specifically, the following method may be adopted to obtain the measurement error of each electric energy sensor. Here, a description will be given taking an electric energy sensor as an example of an electric energy and electric energy device.

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

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

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

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

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

Therefore, when the error reference standard devices are arranged in different ways, the data calibration method corresponding to the step 12 also has a difference.

When the error reference standard device is set in the second mode or the standard table is directly quoted as the error reference standard device, the measurement error of each electric energy sensor in the mesh-shaped electric energy sensor 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 mesh electric energy sensor 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 mesh-shaped electric energy sensor 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 Δ X deviation. Therefore, one electric energy sensor can be selected at will to obtain the actual error value of the electric energy sensor so as to obtain the delta X deviation of the mesh-shaped electric energy sensor system, and therefore the compensated electric energy data of other electric energy sensors can be calibrated to obtain error-free electric energy data.

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

Example 4:

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

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

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

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

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

Based on this way, the error reference standard device generally selects a pipeline where the electric energy sensor sub-meter in the electric energy array located at the last stage 1 in n out is located, or selects a certain electric energy sensor sub-meter in the electric energy array located at the last stage 1 in n out as the error reference standard device. Then, the original measurement data is compensated according to the same error compensation method to obtain error-free data.

Example 5:

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

The processor 41 and the memory 42 may be connected by a bus or other means, and fig. 12 illustrates the connection by a bus as an example.

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

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

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

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

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

Claims

1. A networked power sensor system for facilitating error checking, wherein the networked power sensor system with a pipeline of power sensors is configured as an aggregate of a plurality of subsystems for facilitating error calculation, comprising: the method comprises the following steps that a plurality of electric energy meters and multi-stage 1-in-n-out electric energy arrays are used, and a power supply and utilization network topological relation between an object to be measured and a power supply is constructed through the electric energy meters and the 1-in-n-out electric energy arrays;

the electric energy array at the inlet and the outlet of each stage 1 comprises an electric energy sensor total meter at the inlet side and n electric energy sensor branch meters at the outlet side, and the electric energy sensor total meter at the inlet side and the n electric energy sensor branch meters at the outlet side form a relative energy conservation relation; the electric energy sensor sub-meter positioned on the outgoing line side in the electric energy array which is fed in and out at the previous stage 1 is an electric energy sensor general meter positioned on the incoming line side in the electric energy array which is fed in and out at the next stage 1, aiming at the electric energy arrays which are fed in and out at the two adjacent stages 1;

2. The meshed power sensor system according to claim 1, wherein the meshed power sensor system has in-phase networking capability, the objects to be measured are distributed in the same phase path of a three-phase system, there is a branch between a first meshed power sensor system and a second meshed power sensor system that can be connected, and the first meshed power sensor system has an error reference standard device;

the first netted electric energy sensor system and the second netted electric energy sensor system are provided with connecting terminals, and the first netted electric energy sensor system and the second netted electric energy sensor system are connected through the connecting terminals so as to construct a new 1-in-n-out electric energy array and provide a transmission line for an error reference standard device.

3. The meshed electric energy sensor system according to claim 1, wherein the meshed electric energy sensor system has a cross-phase networking capability, the objects to be measured are distributed on a first phase path and a second phase path of a three-phase system, a multi-phase electric energy general meter is arranged at the input ends of the first phase path and the second phase path, the electric energy sensors in the first phase path and the second phase path are used as electric energy sensor branch meters, and a new 1-in-n-out electric energy array is formed by the electric energy general meter and the multi-phase electric energy general meter;

the first phase circuit and the second phase circuit are provided with switches, and the electric energy sensors on the first phase circuit and the second phase circuit are enabled to operate under the same voltage by switching the states of the switches, so that cross-phase transmission of an error reference standard device is realized, and the calculation of errors is completed;

4. The mesh power sensor system of claim 1, wherein the power sensor comprises any one of a voltage sensor, a current sensor, a shunt, or an electrical power sensor.

5. The meshed power sensor system of claim 1, wherein the 1 in n out power arrays are 1 in 2 out power arrays, each 1 in 2 out power array comprising one incoming side power sensor bus and 2 outgoing side power sensor sub-meters, one incoming side power sensor bus and 2 outgoing side power sensor sub-meters in a relative energy conservation relationship.

6. The meshed power sensor system of claim 1, further comprising an error reference standard device connected in series with a branch of any one of the power sensors;

7. The meshed power sensor system of claim 1, wherein the meshed power sensor system comprises a first 1 in n out power array and a second 1 in n out power array, wherein the first 1 in n out power array and the second 1 in n out power array are independent of each other;

8. The mesh power sensor system of claim 1, comprising a microprocessor connected to each power sensor and a data transmission module connected to the microprocessor for transmitting power data collected by the microprocessor from each power sensor to a cloud server;

9. The meshed power sensor system of claim 8, wherein the power sensors, the data transmission module and the microprocessor are integrated to form a meshed multi-user power meter of the power sensor type;

the multi-user electric energy meter has networking capability, and is an error check-free multi-user electric energy meter.

10. A method of error checking a meshed power sensor system, the meshed power sensor system comprising: the method comprises the following steps that a plurality of electric energy meters and multi-stage 1-in-n-out electric energy arrays are used, and a power supply and utilization network topological relation between an object to be measured and a power supply is constructed through the electric energy meters and the 1-in-n-out electric energy arrays;

the error checking method comprises the following steps:

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

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

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

13. The error-checking method according to claim 11, characterized in that the error reference standard means and the assigned reference error value are determined, in particular:

14. The error-checking method of claim 11, wherein the error is referenced to an error value of a standard device, comprising:

15. The error-checking method of claim 11, further comprising: