CN114152810B - Three-phase electric energy sensor with three-way array structure and measuring system and method thereof - Google Patents
Three-phase electric energy sensor with three-way array structure and measuring system and method thereof Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
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Abstract
The invention discloses a three-phase electric energy sensor with a three-way array structure and a measuring system and method thereof. And establishing a mathematical model by utilizing the electric energy conservation relation of the electric energy system, calculating electric energy measurement error devices of electric energy sensing units respectively arranged on 1 inlet and 2 outlets or 2 inlets and 1 outlet pipelines of the electric energy sensor of the three-way array structure by utilizing electric energy data detected by the electric energy sensor of the three-way array structure and the error reference standard device, and obtaining the electric energy sensor of the three-way array structure without errors or equal errors by utilizing the calculated error to compensate the newly measured electric energy data and continuously iterating the measurement error of the electric energy sensing units. The method reduces the multiple collinearity influence of electric energy data calculation caused by the habit similarity of using electric energy of users, and improves the calculation efficiency and calculation accuracy.
Description
Technical Field
The invention belongs to the technical field of intelligent meter measurement, and particularly relates to a three-phase electric energy sensor with a three-way array structure, a measurement system and a measurement method formed by the three-phase electric energy sensor.
Background
Currently, there are a large number of uses, such as electricity meters, water meters, gas meters or other flow meters, because the amount of use in real life is too large to be removed back to the laboratory for detecting flow errors. There is a need to find techniques and methods for online detection of these flow sensor errors;
for the mathematical algorithm, when the flow measurement system is relatively large, a plurality of flow sensors are included in the flow measurement system, the similarity of the user flow consumption habits can derive the multiple collinearity problem of the flow meter data, and the calculation accuracy of the data calculation method is affected.
Conventionally, flow sensors are installed on the pipeline or at the nodes of the flow measurement system to be measured, and the flow of each point is measured, and the measurement error of each flow sensor is checked separately when needed. The problem with this approach is that the flow sensor error checking is labor intensive and cost prohibitive.
In view of this, overcoming the drawbacks of the prior art is a problem to be solved in the art.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the invention provides a three-phase electric energy sensor with a three-way array structure and a measurement system and a measurement method formed by the three-phase electric energy sensor, and aims to not only construct an electric energy measurement system with any scale through the three-phase electric energy sensor with the three-way array structure, but also divide the electric energy measurement system with a larger scale into a plurality of electric energy arrays with smaller scale through the three-phase electric energy sensor with the three-way array structure, wherein each electric energy array meets the relative energy conservation law, respectively calculates the error of the three-phase electric energy sensor in each electric energy array, weakens the multiple collinearity influence on electric energy data calculation caused by the habit similarity of using electric energy of a user, improves the calculation efficiency and the calculation precision, and solves the technical problem of multiple collinearity of electric energy data.
In order to achieve the above objective, in a first aspect, the present invention provides a three-phase electric energy sensor with a three-way array structure, where the three-phase electric energy sensor with a three-way array structure includes a three-phase electric energy splitting structure with 1 in and 2 out or 2 in and 1 out, the electric energy splitting structure forms a three-phase electric energy system conforming to an electric energy conservation relationship, where electric energy sensing units are respectively disposed on 1 inlet and 2 outlet or 2 in and 1 out pipelines, an error reference standard device is connected in series on any pipeline, a mathematical model is built according to the electric energy conservation relationship, and calculation of measurement errors of the electric energy sensing units is completed by using electric energy data collected by the electric energy sensing units and the error reference standard device, where the three-phase electric energy splitting structure includes relatively independent 3 sets of single-phase three-way array structure electric energy sensors with 1 in and 2 in and 1 out, which are formed by independent a phase single-phase electric energy sensing units with a phase electric energy metering method of 3 meters; or, the three-phase electric energy splitting structure comprises 2 sets of independent single-phase electric energy sensing units forming 2 sets of single-phase three-way array structure electric energy sensors with 1-in and 2-out or 2-in and 1-out, and any set of single-phase three-way array structure electric energy sensors are used for the three-phase three-way array structure electric energy sensors; wherein, the electric energy sensing unit is embodied as each single-phase electric energy sensing unit, specifically:
Establishing a mathematical model by utilizing the electric energy conservation relation of an electric energy system, calculating electric energy measurement errors of electric energy sensing units respectively arranged on inlet and outlet pipelines of the single-phase three-way array structure electric energy sensor by utilizing electric energy data detected by the electric energy shunt structure and the error reference standard device, and continuously and iteratively calculating the measurement errors of the electric energy sensing units by utilizing the calculated errors to compensate the newly measured electric energy data to obtain the single-phase electric energy sensor of the three-way array structure of the single-phase three-way array structure electric energy sensor without errors or equal errors;
the three-phase electric energy sensor of the three-way array structure is used for constructing an electric energy system with measurable electric energy errors, and the array layout of the electric energy system with measurable electric energy errors is completed in a manner of cascading the three-phase electric energy sensors of the three-way array structure.
Preferably, the three-phase electric energy sensor with the three-way array structure uses 3 single-phase electric energy sensors with the three-way array structure to form 1 three-phase electric energy sensor with the three-way array structure with the 3 meter method, and the three-phase electric energy sensor is specifically:
each single-phase 1-in 2-out or 2-in 1-out three-way array structure electric energy sensor forms a single-phase electric energy system which accords with the electric energy conservation relation, wherein 1 inlet and 2 outlets or 2-in 1-out single-phase pipelines are respectively provided with single-phase electric energy sensing units, a mathematical model is established according to the electric energy conservation relation by connecting a single-phase error reference standard device in series on any pipeline, calculation of measuring errors of the single-phase electric energy sensing units is completed by utilizing electric energy data acquired by the single-phase electric energy sensing units and the single-phase error reference standard device, after measuring errors of the single-phase electric energy sensing units of A, B, C three phases are calculated respectively, phase-combination electric energy measuring errors of the three-phase electric energy sensor of the three-way array structure are obtained through phase-combination calculation, the three-phase electric energy data obtained through new measurement of the phase-combination error compensation obtained through calculation are continuously and iteratively calculated and compensated, and the three-phase electric energy sensor of the three-way array structure of the electric energy shunt structure without errors or the like errors is obtained.
Preferably, the three-phase electric energy sensor with the three-way array structure uses 2 single-phase electric energy sensors with the three-way array structure to form 1 three-phase electric energy sensor with the three-way array structure with the 2 meter method, and the three-phase electric energy sensor is specifically:
the three-phase electric energy sensor comprises 1 single-phase three-way array structure electric energy sensor, C-phase current and BC inter-phase voltage, wherein the 1 single-phase three-way array structure electric energy sensor is connected with A-phase current and AB inter-phase voltage, the other 1 single-phase three-way array structure electric energy sensor is connected with C-phase current and BC inter-phase voltage, each single-phase three-way array structure electric energy sensor with 1 inlet and 2 outlet or 2 inlet and 1 outlet is formed into a single-phase electric energy system conforming to the electric energy conservation relation, single-phase electric energy sensing units are respectively arranged on the 1 inlet and 2 outlet or 2 inlet and 1 outlet single-phase pipelines, a single-phase error reference standard device is connected in series on any pipeline, a mathematical model is established according to the electric energy conservation relation, electric energy data acquired by the single-phase electric energy sensing units and the single-phase error reference standard device are utilized, calculation of measurement errors of the single-phase electric energy sensing units is completed, after the measurement errors of the 2 single-phase electric energy sensing units are calculated respectively, the combined phase electric energy measurement errors of the three-phase electric energy sensor with the three-phase array structure are obtained, the combined phase electric energy data obtained through new measurement of the combined phase error compensation are calculated, and the three-phase electric energy sensor with the three-phase structure is continuously calculated and the three-phase electric energy sensor with the three-phase structure.
In a second aspect, the present invention provides an electric energy measurement system composed of three-phase electric energy sensors of a three-way array structure, in an electric energy system provided with three-phase electric energy sensors of a three-way array structure according to the first aspect, comprising: the three-phase electric energy sensor of the three-way array structure of at least two stages comprises an electric energy sensing total surface unit positioned on the inflow side and 2 electric energy sensing sub-meter units positioned on the outflow side corresponding to each three-phase electric energy sensor of the three-way array structure of each stage; in a single-phase three-way array structure electric energy sensor, the electric energy of 1 electric energy sensing total surface unit and 2 electric energy sensing sub-meter units form a relative electric energy conservation relation;
the three-phase electric energy sensor of the three-way array structure of the adjacent two stages 1 in and 2 out is positioned in the same phase of electric energy, the electric energy sensing sub-meter unit positioned on the outflow side of the three-phase electric energy sensor of the three-way array structure of the upper stage 1 in and 2 out is an electric energy sensing total surface unit positioned on the inflow side of the three-phase electric energy sensor of the three-way array structure of the lower stage 1 in and 2 out.
Preferably, the electric energy measurement system comprises n three-phase electric energy sensors with three-way array structures, wherein the three-phase electric energy sensors with three-way array structures are mutually independent;
The electric energy measurement system further comprises an error reference standard device, and the error reference standard device is connected in series to any pipeline branch of any three-way array structure of the three-phase electric energy sensors of the n three-way array structures.
Preferably, if the electric energy measurement system adopts a 2-meter electric energy measurement method, the electric energy measurement system comprises at least 2 three-phase electric energy measurement error reference standard devices, wherein the three-phase electric energy measurement error reference standard devices are connected in series with two single-phase three-way array structure electric energy sensors of a three-way array structure of any one three-phase electric energy sensor, or at least 3 error reference standard devices, and the 3 error reference standard devices are respectively connected in series with any branch of each of the 3 single-phase 1-in and 2-out three-way array structure electric energy sensors;
when the error reference standard device is arranged on a branch of the three-way array of which the last stage 1 is in and out, transmitting an error reference value in a progressive calculation mode from a lower level to an upper level so as to calibrate an electric energy measurement system and obtain error-free data or equal error data;
when the error reference standard device is arranged on a branch of the three-way array of which the uppermost stage 1 is in and out of the 2 th stage, an error reference value is transmitted in a progressive calculation mode from the upper layer to the lower layer so as to calibrate the electric energy measurement system, and error-free data or equal error data are obtained;
When the error reference standard device is arranged on a branch of the three-way array with the middle stage 1 in and 2 out, an error reference value is transmitted by a mode of progressive calculation from the middle stage to the upper layer and a mode of progressive calculation from the middle stage to the lower layer so as to calibrate the electric energy measurement system and obtain error-free data or equal error data.
Preferably, the electric energy measurement system comprises a microprocessor and a data transmission module, wherein the microprocessor is connected with each three-phase electric energy sensor, and the data transmission module is connected with the microprocessor and used for calculating error edges of the three-phase electric energy sensors in the three-way array structure and/or sending electric energy data acquired from each three-phase electric energy sensor to the cloud server.
In a third aspect, the present invention also provides a measurement method of an electric energy measurement system constituted by three-phase electric energy sensors of a three-way array structure, the electric energy system constituted by three-phase electric energy sensors of a three-way array structure comprising: the three-phase electric energy sensor of the three-way array structure of at least two stages 1 in and 2 out, wherein the three-way array of each stage 1 in and 2 out comprises an electric energy sensing total surface positioned on the inflow side and 2 three-phase electric energy sensor sub-meter units positioned on the outflow side, and the electric energy sensing total surface positioned on the inflow side and the 2 three-phase electric energy sensor sub-meter units positioned on the outflow side form a relative electric energy conservation relation;
The three-phase electric energy sensor meter dividing unit is used for dividing three-way arrays of 1 in and 2 out of adjacent two stages into three-way arrays of 1 in and 2 out of the upper stage into three-way arrays of 1 in and 2 out of the lower stage into three-way arrays of the lower stage;
the error checking method comprises the following steps:
designating or establishing an error reference standard device in the electric energy measurement system and giving a reference error value to the error reference standard device;
collecting original measurement data of three-phase electric energy sensors on all input branches and output branches in the electric energy measurement system and original measurement data of the error reference standard device;
calculating to obtain reference measurement error values of three-phase electric energy sensors in the three-way array with the 1-in and 2-out of the error reference standard device by utilizing a mathematical model established by relative electric energy conservation relation aiming at the three-way array with the 1-in and 2-out of the error reference standard device;
acquiring a three-phase electric energy sensor of a three-way array structure with a higher-level or lower-level 1-in-2-out relation with the three-phase electric energy sensor of the three-way array structure with the calculated reference measurement error value, and calculating the reference measurement error value of an electric energy sensing unit in the three-way array with the corresponding higher-level or lower-level 1-in-2-out relation by utilizing the relative electric energy conservation relation;
And calculating the reference measurement error value process of the three-phase electric energy sensors in the three-way array with the 1-in and 2-out through one or more previous or next stages, so as to obtain the reference measurement error values of all three-way electric energy sensors with three-way array structures in the electric energy measurement system, and compensating the original measurement data according to the reference measurement error values of the three-way electric energy sensors with each three-way array structure to obtain the equal-error data or error-free data.
Preferably, the compensating the original measurement data according to the reference measurement error value of each electric energy sensing unit to obtain the equal error data or the error-free data includes:
compensating corresponding original measurement data by using the reference measurement error value to obtain equal error data of the reference error value of each three-phase electric energy sensor relative to the error reference standard device; when the delta X deviation exists between the true error value and the reference error value of the error reference standard device, compensating the equal error data of the corresponding three-phase electric energy sensors by using the delta X deviation to obtain error-free data; or,
and directly calculating to obtain error-free data of the three-phase electric energy sensors corresponding to the three-way array structures according to the true error value of the error reference standard device.
Preferably, the Δx deviation between the true error value and the reference error value of the error reference standard device is obtained, specifically:
taking down the three-phase electric energy sensor selected as an error reference standard device, and measuring the true error value of the taken-down three-phase electric energy sensor; and subtracting the reference error value of the selected three-phase electric energy sensor from the actual error value of the removed three-phase electric energy sensor to obtain delta X deviation.
Preferably, the error reference standard means and the assigned reference error value are determined, in particular:
a first three-phase electric energy sensor unit with a known true error value is connected in series on any pipeline branch of the three-phase electric energy sensor of any three-way array structure of the electric energy measurement system;
in the operation process of the electric energy measurement system, respectively reading electric energy data of the first three-phase electric energy sensor unit and electric energy data of the three-phase electric energy sensor on the selected branch, and calculating the real error value of the three-phase electric energy sensor on the selected branch;
the three-phase electric energy sensors on the selected branch are used as error reference standard devices, and the calculated true error values of the three-phase electric energy sensors on the selected branch are used for calculating the true error of each connected three-phase electric energy sensor in the electric energy measurement system.
Preferably, the error reference standard device includes:
in the electric energy measurement system, after any three-phase electric energy sensor is selected as an error reference standard device, a preset reference error value is matched with a measurement error of the error reference standard device, wherein the difference value between the preset reference error value of the error reference standard device and an actual error value of the error reference standard device is equal to DeltaX deviation.
Preferably, the method for measuring the electric energy system formed by the tee joint array further comprises the following steps:
after the original measurement data of the three-phase electric energy sensor are collected, determining the similarity condition of each original measurement data;
if the similarity of at least two groups of original measurement data is larger than a preset similarity threshold, adopting a hierarchical calculation mode to calculate measurement errors of each three-phase electric energy sensor in a cascading way so as to verify the original measurement data;
if the similarity of each group of original measurement data is smaller than a preset similarity threshold value, dividing the three-phase electric energy sensors in the three-way array of the last stage 1 in and 2 out into a meter and a total electric energy sensor table in the three-way array of the uppermost stage 1 in and 2 out, and obtaining measurement errors of the corresponding three-phase electric energy sensors by utilizing a relative electric energy conservation relationship so as to verify the original measurement data.
Preferably, after completing the layout of the three-way array in the electric energy system and completing the calculation of the electric energy measurement errors of the three-phase electric energy sensors respectively arranged on the 1-inlet and 2-outlet lines, the measurement data after error revision in the three-way array is used for completing the continuous iterative calculation of the errors of the electric energy measurement devices in the electric energy system on the corresponding pipeline.
In general, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects: the invention provides a three-phase electric energy sensor with a three-way array structure and a measurement system and a measurement method thereof, wherein the electric energy measurement system comprises at least two three-phase electric energy sensors with the three-way array structure, the three-phase electric energy sensors with the three-way array structure not only can construct an electric energy measurement system with any scale, but also can divide the electric energy measurement system with a larger scale into a plurality of electric energy arrays with smaller scales through the three-phase electric energy sensors with the three-way array structure, each electric energy array meets the relative energy conservation law, the errors of the three-phase electric energy sensors in each electric energy array are calculated respectively, the multiple collinearity influence of electric energy data calculation caused by the similarity of habits of users is weakened, and the calculation efficiency and calculation precision are improved.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings that are required to be used in the embodiments of the present invention will be briefly described below. It is evident that the drawings described below are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
Fig. 1 is a schematic diagram of a single-phase three-way array structure electric energy sensor in a three-way array structure three-phase electric energy sensor according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a measurement system formed by a single-phase three-way array structure electric energy sensor on a certain phase in a three-way array structure electric energy sensor according to an embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of a circuit structure based on a sharing standard according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electric meter box according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of another embodiment of an electricity meter box;
FIG. 6 is a schematic diagram of a method for measuring an electrical energy system formed by a three-way array according to an embodiment of the present invention;
FIG. 7 is a flow chart of a first implementation of step 10 of FIG. 6 according to an embodiment of the present invention;
FIG. 8 is a flow chart of a second implementation of step 10 of FIG. 6 provided by an embodiment of the present invention;
FIG. 9 is a flow chart of a third implementation of step 10 of FIG. 6 provided by an embodiment of the present invention;
fig. 10 is a schematic structural diagram of an error measurement device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The error reference standard device refers to a standard device used as an error reference standard, so that the error reference standard device is determined in the description, and in a certain sense, electric energy data reported by the error reference standard device is used as an error reference standard for breaking homogeneous equations in the calculation process. Whether using physical experimentation or mathematical calculations, the measurement of any one quantity is relative to a reference datum; any one measurement error is detected relative to an error reference standard, and the etalon or data for the error reference standard is referred to as the error reference standard. For example, a "standard meter" in the experiment of error checking of the conventional electric energy meter is an error reference standard. When calculating an error using the power data, the data error of the power sensor used as the reference datum is the error reference standard calculated at this time.
The constant error data according to the present invention is: for any sensor with errors, after the error calibration processing is performed on the original measurement data of the sensor (the original measurement data has errors) by using the detected error value after the measurement error of any sensor with errors is detected, all the errors of the obtained calibrated electric energy data still exist are equal to the errors brought by the error detection method. These calibrated power data are referred to as "equierror" data. The "isoerror" is equal to the error value of the error reference standard itself (also described as Δx deviation in various embodiments of the invention). Under the concept of the same error, after error calibration processing, the measurement error of each piece of electric energy data of the sensing system is the same. The concept of error is an effective theory which is proposed by the inventor after years of research aiming at the field of sensing systems.
The error-free data according to the invention are: for any isoerror data, when its "isoerror" is measured and calibrated, the resulting data is error-free data. In view of the fact that it is theoretically impossible to have absolute error-free data, it is possible in other words that the error-free data is data with no errors or negligible errors.
Example 1:
as shown in fig. 1 (which is a schematic diagram of a three-phase electric energy sensor with a three-phase array structure under a 3-meter electric energy metering method), the three-phase electric energy sensor with the three-phase array structure comprises a three-phase electric energy splitting structure with 1 in and 2 out or 2 in and 1 out, the three-phase electric energy splitting structure forms a three-phase electric energy system conforming to an electric energy conservation relation, electric energy sensing units are respectively arranged on pipelines with 1 inlet and 2 outlets or 2 in and 1 out, an error reference standard device is connected in series on any pipeline, a mathematical model is established according to the electric energy conservation relation, and electric energy data acquired by the electric energy sensing units and the error reference standard device is utilized to finish calculation of measurement errors of the electric energy sensing units, wherein the three-phase electric energy splitting structure comprises a relatively independent three-phase array structure with 3 sets of 1 in and 2 out or 2 in and 1 out, which is composed of independent A-phase, B-phase and C-phase single-phase electric energy sensing units under the 3-meter electric energy metering method; or, the three-phase electric energy splitting structure comprises 2 sets of independent single-phase electric energy sensing units forming 2 sets of single-phase three-way array structure electric energy sensors with 1-in and 2-out or 2-in and 1-out, and any set of single-phase three-way array structure electric energy sensors are used for the three-phase three-way array structure electric energy sensors; wherein, the electric energy sensing unit is embodied as each single-phase electric energy sensing unit, specifically:
Establishing a mathematical model by utilizing the electric energy conservation relation of an electric energy system, calculating electric energy measurement errors of electric energy sensing units respectively arranged on inlet and outlet pipelines of the single-phase three-way array structure electric energy sensor by utilizing electric energy data detected by the electric energy shunt structure and the error reference standard device, and continuously and iteratively calculating the measurement errors of the electric energy sensing units by utilizing the calculated errors to compensate the newly measured electric energy data to obtain the single-phase electric energy sensor of the three-way array structure of the single-phase three-way array structure electric energy sensor without errors or equal errors; the method is based on the fact that the measurement error of the electric energy sensing unit is continuously calculated in an iterative manner until the difference between the calculated error values is smaller than a preset value (the preset value is obtained according to experience and test experiments and is not described in detail herein), and then the error-free or equal error value of each electric energy sensor in the single-phase three-way array structure electric energy sensor can be determined.
The three-phase electric energy sensor of the three-way array structure is used for constructing an electric energy system with measurable electric energy errors, and the array layout of the electric energy system with measurable electric energy errors is completed in a manner of cascading the three-phase electric energy sensors of the three-way array structure.
The embodiment of the invention provides a three-phase electric energy sensor with a three-way array structure, wherein the three-phase electric energy sensor with the three-way array structure not only can construct an electric energy measuring system with any scale, but also can divide the electric energy measuring system with a larger scale into a plurality of electric energy arrays with smaller scales through the three-phase electric energy sensor with the three-way array structure, each electric energy array meets the relative energy conservation law, the error of the three-phase electric energy sensor in each electric energy array is calculated respectively, the multiple collinearity influence on electric energy data calculation caused by the habit similarity of using electric energy of a user is weakened, and the calculation efficiency and calculation precision are improved.
In the embodiment of the invention, if three-phase electric energy sensors with a three-way array structure use 3 single-phase electric energy sensors with a three-way array structure, 1 three-phase electric energy sensor with a three-way array structure with a 3-meter method, the specific steps are as follows:
each single-phase 1-in 2-out or 2-in 1-out three-way array structure electric energy sensor forms a single-phase electric energy system which accords with the electric energy conservation relation, wherein 1 inlet and 2 outlets or 2-in 1-out single-phase pipelines are respectively provided with single-phase electric energy sensing units, a mathematical model is established according to the electric energy conservation relation by connecting a single-phase error reference standard device in series on any pipeline, calculation of measuring errors of the single-phase electric energy sensing units is completed by utilizing electric energy data acquired by the single-phase electric energy sensing units and the single-phase error reference standard device, after measuring errors of the single-phase electric energy sensing units of A, B, C three phases are calculated respectively, phase-combination electric energy measuring errors of the three-phase electric energy sensor of the three-way array structure are obtained through phase-combination calculation, the three-phase electric energy data obtained through new measurement of the phase-combination error compensation obtained through calculation are continuously and iteratively calculated and compensated, and the three-phase electric energy sensor of the three-way array structure of the electric energy shunt structure without errors or the like errors is obtained.
On the other hand, in the embodiment of the present invention, if 2 single-phase three-way array structure electric energy sensors are used as the three-phase electric energy sensors of the three-way array structure, 1 three-phase electric energy sensor of the three-way array structure of the 2 meter method, the specific is:
the three-phase electric energy sensor comprises 1 single-phase three-way array structure electric energy sensor, C-phase current and BC inter-phase voltage, wherein the 1 single-phase three-way array structure electric energy sensor is connected with A-phase current and AB inter-phase voltage, the other 1 single-phase three-way array structure electric energy sensor is connected with C-phase current and BC inter-phase voltage, each single-phase three-way array structure electric energy sensor with 1 inlet and 2 outlet or 2 inlet and 1 outlet is formed into a single-phase electric energy system conforming to the electric energy conservation relation, single-phase electric energy sensing units are respectively arranged on the 1 inlet and 2 outlet or 2 inlet and 1 outlet single-phase pipelines, a single-phase error reference standard device is connected in series on any pipeline, a mathematical model is established according to the electric energy conservation relation, electric energy data acquired by the single-phase electric energy sensing units and the single-phase error reference standard device are utilized, calculation of measurement errors of the single-phase electric energy sensing units is completed, after the measurement errors of the 2 single-phase electric energy sensing units are calculated respectively, the combined phase electric energy measurement errors of the three-phase electric energy sensor with the three-phase array structure are obtained, the combined phase electric energy data obtained through new measurement of the combined phase error compensation are calculated, and the three-phase electric energy sensor with the three-phase structure is continuously calculated and the three-phase electric energy sensor with the three-phase structure.
Example 2:
the present invention also provides an electrical energy measurement system composed of three-phase electrical energy sensors of a three-way array structure, in an electrical energy system provided with three-phase electrical energy sensors of a three-way array structure as described in embodiment 1, comprising: the three-phase electric energy sensor of the three-way array structure of at least two stages comprises an electric energy sensing total surface unit positioned on the inflow side and 2 electric energy sensing sub-meter units positioned on the outflow side corresponding to each three-phase electric energy sensor of the three-way array structure of each stage; in a single-phase three-way array structure electric energy sensor, the electric energy of 1 electric energy sensing total surface unit and 2 electric energy sensing sub-meter units form a relative electric energy conservation relation; as shown in fig. 2, a schematic diagram of the cascading structure effect is formed by taking one phase of the three-phase ammeter as an example;
the three-phase electric energy sensor of the three-way array structure of the adjacent two stages 1 in and 2 out is positioned in the same phase of electric energy, the electric energy sensing sub-meter unit positioned on the outflow side of the three-phase electric energy sensor of the three-way array structure of the upper stage 1 in and 2 out is an electric energy sensing total surface unit positioned on the inflow side of the three-phase electric energy sensor of the three-way array structure of the lower stage 1 in and 2 out.
The embodiment of the invention provides a measurement system formed by three-phase electric energy sensors of a three-way array structure, wherein the three-phase electric energy sensors of the three-way array structure not only can construct an electric energy measurement system of any scale, but also can divide the electric energy measurement system of a larger scale into a plurality of electric energy arrays of a smaller scale through the three-phase electric energy sensors of the three-way array structure, each electric energy array meets the law of relative conservation of energy, the errors of the three-phase electric energy sensors in each electric energy array are calculated respectively, the multiple collinearity influence on electric energy data calculation caused by the similarity of the habit of using electric energy of a user is weakened, and the calculation efficiency and the calculation precision are improved.
In combination with the embodiment of the invention, a preferred implementation scheme exists, and the electric energy measurement system comprises n three-phase electric energy sensors with three-way array structures, wherein the three-phase electric energy sensors with three-way array structures are mutually independent;
the electric energy measurement system further comprises an error reference standard device, and the error reference standard device is connected in series to any pipeline branch of any three-way array structure of the three-phase electric energy sensors of the n three-way array structures.
In combination with the embodiment of the invention, a preferred implementation scheme exists, if the electric energy measurement system adopts a 2-meter electric energy measurement method, the system comprises at least 2 three-phase electric energy measurement error reference standard devices, the three-phase electric energy measurement error reference standard devices are connected in series with two single-phase three-way array structure electric energy sensors of a three-way array structure of any one, or at least 3 error reference standard devices, and the 3 error reference standard devices are respectively connected in series with any branch of each of the 3 single-phase 1-in 2-out three-way array structure electric energy sensors;
when the error reference standard device is arranged on a branch of the three-way array of which the last stage 1 is in and out, transmitting an error reference value in a progressive calculation mode from a lower level to an upper level so as to calibrate an electric energy measurement system and obtain error-free data or equal error data;
when the error reference standard device is arranged on a branch of the three-way array of which the uppermost stage 1 is in and out of the 2 th stage, an error reference value is transmitted in a progressive calculation mode from the upper layer to the lower layer so as to calibrate the electric energy measurement system, and error-free data or equal error data are obtained;
When the error reference standard device is arranged on a branch of the three-way array with the middle stage 1 in and 2 out, an error reference value is transmitted by a mode of progressive calculation from the middle stage to the upper layer and a mode of progressive calculation from the middle stage to the lower layer so as to calibrate the electric energy measurement system and obtain error-free data or equal error data.
In combination with the embodiment of the invention, a preferred implementation scheme exists, and the electric energy measurement system comprises a microprocessor and a data transmission module, wherein the microprocessor is connected with each three-phase electric energy sensor, and the data transmission module is connected with the microprocessor and is used for calculating the error edges of the three-phase electric energy sensors in a three-way array structure and/or sending electric energy data acquired from each three-phase electric energy sensor to a cloud server.
In combination with the embodiment of the invention, a preferred implementation scheme exists, and the electric energy measurement system comprises n three-phase electric energy sensors with three-way array structures, wherein the three-phase electric energy sensors with three-way array structures are mutually independent;
the electric energy measurement system further comprises an error reference standard device, and the error reference standard device is connected in series to any pipeline branch of any three-way array structure of the three-phase electric energy sensors of the n three-way array structures.
There is a preferred implementation scheme in combination with the embodiment of the invention, the electric energy measurement system further comprises an error reference standard device, and the error reference standard device is connected in series on any branch of the three-phase electric energy sensor with the three-way array structure;
when the error reference standard device is arranged on a branch of the three-way array of which the last stage 1 is in and out, transmitting an error reference value in a progressive calculation mode from a lower level to an upper level so as to calibrate an electric energy measurement system and obtain error-free data or equal error data;
when the error reference standard device is arranged on a branch of the three-way array of which the uppermost stage 1 is in and out of the 2 th stage, an error reference value is transmitted in a progressive calculation mode from the upper layer to the lower layer so as to calibrate the electric energy measurement system, and error-free data or equal error data are obtained;
when the error reference standard device is arranged on a branch of the three-way array with the middle stage 1 in and 2 out, an error reference value is transmitted by a mode of progressive calculation from the middle stage to the upper layer and a mode of progressive calculation from the middle stage to the lower layer so as to calibrate the electric energy measurement system and obtain error-free data or equal error data.
In combination with the embodiment of the invention, a preferred implementation scheme exists, and the electric energy measurement system comprises a microprocessor and a data transmission module, wherein the microprocessor is connected with each three-phase electric energy sensor, and the data transmission module is connected with the microprocessor and is used for calculating the error edges of the three-phase electric energy sensors in a three-way array structure and/or sending electric energy data acquired from each three-phase electric energy sensor to a cloud server.
Example 3:
the embodiment of the invention also provides a measuring method of the electric energy measuring system formed by the three-phase electric energy sensors with the three-way array structure, the electric energy system formed by the three-phase electric energy sensors with the three-way array structure comprises the following steps: the three-phase electric energy sensor of the three-way array structure of at least two stages 1 in and 2 out, wherein the three-way array of each stage 1 in and 2 out comprises an electric energy sensing total surface positioned on the inflow side and 2 three-phase electric energy sensor sub-meter units positioned on the outflow side, and the electric energy sensing total surface positioned on the inflow side and the 2 three-phase electric energy sensor sub-meter units positioned on the outflow side form a relative electric energy conservation relation;
the three-phase electric energy sensor meter dividing unit is used for dividing three-way arrays of 1 in and 2 out of adjacent two stages into three-way arrays of 1 in and 2 out of the upper stage into three-way arrays of 1 in and 2 out of the lower stage into three-way arrays of the lower stage;
The error checking method comprises the following steps:
designating or establishing an error reference standard device in the electric energy measurement system and giving a reference error value to the error reference standard device;
collecting original measurement data of three-phase electric energy sensors on all input branches and output branches in the electric energy measurement system and original measurement data of the error reference standard device;
calculating to obtain reference measurement error values of three-phase electric energy sensors in the three-way array with the 1-in and 2-out of the error reference standard device by utilizing a mathematical model established by relative electric energy conservation relation aiming at the three-way array with the 1-in and 2-out of the error reference standard device;
acquiring a three-phase electric energy sensor of a three-way array structure with a higher-level or lower-level 1-in-2-out relation with the three-phase electric energy sensor of the three-way array structure with the calculated reference measurement error value, and calculating the reference measurement error value of an electric energy sensing unit in the three-way array with the corresponding higher-level or lower-level 1-in-2-out relation by utilizing the relative electric energy conservation relation;
and calculating the reference measurement error value process of the three-phase electric energy sensors in the three-way array with the 1-in and 2-out through one or more previous or next stages, so as to obtain the reference measurement error values of all three-way electric energy sensors with three-way array structures in the electric energy measurement system, and compensating the original measurement data according to the reference measurement error values of the three-way electric energy sensors with each three-way array structure to obtain the equal-error data or error-free data.
The embodiment of the invention provides a measurement method formed by three-phase electric energy sensors of a three-way array structure, wherein the three-phase electric energy sensors of the three-way array structure not only can construct an electric energy measurement system of any scale, but also can divide the electric energy measurement system of a larger scale into a plurality of electric energy arrays of a smaller scale through the three-phase electric energy sensors of the three-way array structure, each electric energy array meets the law of relative conservation of energy, the error of the three-phase electric energy sensor in each electric energy array is calculated respectively, the multiple collinearity influence on electric energy data calculation caused by the similarity of the habit of using electric energy of a user is weakened, and the calculation efficiency and the calculation precision are improved.
In combination with the embodiment of the present invention, there is a preferred implementation scheme, the compensating the original measurement data according to the reference measurement error value of each electric energy sensing unit, to obtain the equal error data or the error-free data includes:
compensating corresponding original measurement data by using the reference measurement error value to obtain equal error data of the reference error value of each three-phase electric energy sensor relative to the error reference standard device; when the delta X deviation exists between the true error value and the reference error value of the error reference standard device, compensating the equal error data of the corresponding three-phase electric energy sensors by using the delta X deviation to obtain error-free data; or,
And directly calculating to obtain error-free data of the three-phase electric energy sensors corresponding to the three-way array structures according to the true error value of the error reference standard device.
In combination with the embodiment of the invention, there is a preferred implementation scheme, and the method for acquiring the DeltaX deviation between the true error value and the reference error value of the error reference standard device specifically comprises the following steps:
taking down the three-phase electric energy sensor selected as an error reference standard device, and measuring the true error value of the taken-down three-phase electric energy sensor; and subtracting the reference error value of the selected three-phase electric energy sensor from the actual error value of the removed three-phase electric energy sensor to obtain delta X deviation.
There is a preferred implementation scheme in combination with the embodiment of the present invention, which determines the error reference standard device and the assigned reference error value, specifically:
a first three-phase electric energy sensor unit with a known true error value is connected in series on any pipeline branch of the three-phase electric energy sensor of any three-way array structure of the electric energy measurement system;
in the operation process of the electric energy measurement system, respectively reading electric energy data of the first three-phase electric energy sensor unit and electric energy data of the three-phase electric energy sensor on the selected branch, and calculating the real error value of the three-phase electric energy sensor on the selected branch;
The three-phase electric energy sensors on the selected branch are used as error reference standard devices, and the calculated true error values of the three-phase electric energy sensors on the selected branch are used for calculating the true error of each connected three-phase electric energy sensor in the electric energy measurement system.
There is a preferred implementation manner in connection with the embodiment of the present invention, where the reference error value of the error reference standard device includes:
in the electric energy measurement system, after any three-phase electric energy sensor is selected as an error reference standard device, a preset reference error value is matched with a measurement error of the error reference standard device, wherein the difference value between the preset reference error value of the error reference standard device and an actual error value of the error reference standard device is equal to DeltaX deviation.
There is a preferred implementation scheme in combination with the embodiment of the present invention, where the method for measuring an electric energy system formed by the three-way array further includes:
after the original measurement data of the three-phase electric energy sensor are collected, determining the similarity condition of each original measurement data;
if the similarity of at least two groups of original measurement data is larger than a preset similarity threshold, adopting a hierarchical calculation mode to calculate measurement errors of each three-phase electric energy sensor in a cascading way so as to verify the original measurement data;
If the similarity of each group of original measurement data is smaller than a preset similarity threshold value, dividing the three-phase electric energy sensors in the three-way array of the last stage 1 in and 2 out into a meter and a total electric energy sensor table in the three-way array of the uppermost stage 1 in and 2 out, and obtaining measurement errors of the corresponding three-phase electric energy sensors by utilizing a relative electric energy conservation relationship so as to verify the original measurement data.
In combination with the embodiment of the invention, a preferred implementation scheme exists, after completing the layout of the three-way array in the electric energy system and completing the calculation of the electric energy measurement errors of the three-phase electric energy sensors respectively arranged on the 1-inlet and 2-outlet lines, the continuous iterative calculation of the errors of the electric energy measurement devices in the electric energy system on the corresponding pipelines is completed by using the measurement data after the error correction in the three-way array.
Example 4:
at present, when the electric energy measurement system is large in scale, due to the similarity of electric energy consumption habits of users, the problem of multiple collinearity of electric energy meter data can be derived, so that the calculation efficiency is reduced, and the calculation accuracy of a data calculation method is affected. In the embodiments of the present invention and the subsequent embodiments, specific implementation procedures of embodiments 1 to 3 of the present invention will be shown with emphasis on a single-phase power sensor among three-phase power sensors as an illustration object. As a person skilled in the art, the process of implementing the phase-combining calculation further according to the 3-table method or the 2-table method belongs to the technical content known in the three-phase power field, and thus will not be repeated.
In order to solve the foregoing problems, the present embodiment provides an electrical energy measurement system for facilitating error checking, in practical use, the electrical energy measurement system with a pipeline of electrical energy sensors is configured as a structure of a plurality of subsystems for facilitating error calculation, the electrical energy measurement system includes at least two electrical energy sensors with a 1 in and 2 out single-phase three-way array structure, wherein the electrical energy sensors with the 1 in and 2 out single-phase three-way array structure can not only configure any scale of electrical energy measurement system, but also divide each single-phase electrical energy measurement system in the three-phase electrical energy measurement system with a larger scale into a plurality of smaller scale electrical energy arrays, each electrical energy array satisfies the relative energy conservation law, and calculates the error of the electrical energy sensor in each electrical energy array, so as to effectively reduce the multiple co-linearity problem of electrical energy data.
Wherein the plurality of power sensors in each power array conform to the correct network topology. The network topology relationship refers to connection and attribution relationship between an incoming line side electric energy sensor and an outgoing line side electric energy sensor, wherein the concepts of the incoming line side electric energy sensor and the outgoing line side electric energy sensor are relative terms, and the network topology relationship is a relationship between an electric energy summary table and an electric energy sub-meter.
With reference to fig. 2, a schematic structural diagram of the power measuring system of the present embodiment is described, the power measuring system including: the electric energy sensor of the three-way array structure of at least two stages 1 in and 2 out, wherein the electric energy sensor of the three-way array structure of each stage 1 in and 2 out comprises an electric energy sensor total surface unit positioned on an inlet side and 2 electric energy sensor sub-meter units positioned on an outlet side, and the electric energy sensor total surface unit positioned on the inlet side and the 2 electric energy sensor sub-meter units positioned on the outlet side form a relative energy conservation relation.
The meter dividing unit is used for dividing the electric energy sensor of the adjacent two-stage 1 in and 2 out single-phase three-way array structure into meter units at the outlet side of the electric energy sensor of the upper-stage 1 in and 2 out single-phase three-way array structure, and is a total meter unit of the electric energy sensor of the next-stage 1 in and 2 out single-phase three-way array structure at the inlet side of the electric energy sensor.
In this embodiment, the upper stage and the lower stage are relative concepts, wherein the uppermost stage of the electric energy sensor and the last stage of the electric energy sensor are removed, the electric energy sensor located in the middle is the electric energy sensor of the single-phase three-way array structure with 1 in and 2 out of the electric energy sensors of different 1 in and 2 out, the electric energy sensor of the single-phase three-way array structure with 1 in and 2 out of the upper stage can be subordinate to the electric energy sensor of the single-phase three-way array structure with 1 in and 2 out of the lower stage, and when a certain electric energy sensor is subordinate to the electric energy sensor of the single-phase three-way array structure with 1 in and 2 out of the upper stage, the electric energy sensor is an electric energy sensor sub-meter; when one electric energy sensor belongs to the electric energy sensor with the single-phase three-way array structure of the next stage 1 in 2 out, the electric energy sensor is the total table of the electric energy sensors.
The error calculation and compensation of the electric energy sensor with the 1-in and 2-out three-way array structure are explained.
For an electrical energy measurement system with 1 inlet line and 2 outlet lines, the electrical energy meets the relative energy conservation relationship, namely, the following formula is satisfied:
wherein w in the foregoing formula 0 ，x 0 And w i ，x i Representing the total surface of 1 electric energy sensor and the original measurement data and error corresponding to the ith electric energy sensor.
In the foregoing formula, x 0 And x i Any one of the data is a known quantity, and the error value of other electric energy sensors can be obtained through calculation by reading the data for at least 2 times.
And compensating the readings of the total table unit of the electric energy sensor and the sub table of the electric energy sensor by using the calculated error value, so that electric energy data without errors or equal errors can be obtained:
w′ 0 ＝w 0 (1+x 0 )
w′ i ＝w i (1+x i )
wherein w' 0 And w' i The data respectively represent the electric energy data of the compensated electric energy sensor total surface unit and the electric energy sensor sub-meter, and the compensated data also satisfy the relative energy conservation relation:
in the foregoing calculation process, an error reference standard needs to be set, and error-free data or error-free data can be obtained by using the error reference standard, so as to perform error correction on the electric energy measurement system.
The selection or setting of the error reference criteria includes at least the following: a cascading calculation transfer method; a method of sharing criteria; a standard method is connected in series; post-correction methods.
The cascade calculation transfer method refers to the following steps: and selecting an electric energy sensor on a branch of the electric energy sensor with a single-phase three-way array structure with 1 in and 2 out of a certain stage as an error reference standard device, and endowing the error reference standard device with a reference error value.
Specifically, when the error reference standard device is arranged on a branch of the electric energy sensor of the single-phase three-way array structure of which the last stage 1 is in and out, an error reference value is transmitted in a way of progressive calculation from a lower level to an upper level so as to calibrate an electric energy measurement system, and error-free data or equal error data are obtained; when the error reference standard device is arranged on a branch of the electric energy sensor of the single-phase three-way array structure with the inlet and the outlet of the uppermost stage 1, the error reference value is transmitted in a progressive calculation mode from the upper layer to the lower layer so as to calibrate the electric energy measurement system, and error-free data or equal error data are obtained. In a preferred embodiment, the error reference standard device may be disposed at an intermediate stage, so that the error reference standard device may be calibrated from the intermediate stage to two ends respectively, so as to improve the calculation efficiency, specifically, when the error reference standard device is disposed on a branch of the electric energy sensor with a single-phase three-way array structure of 1 in and 2 out of the intermediate stage, the error reference value is transmitted by means of progressive calculation from the intermediate stage to the upper stage and progressive calculation from the intermediate stage to the lower stage, so as to calibrate the electric energy measurement system, and obtain error-free data or equal error data.
For example, "1" in each single-phase three-way array structure of 1 in 2 out of the lower level (the error value has been calculated) may be a subset of "2" in another single-phase three-way array structure of 1 in 2 out of the upper level (the error has yet to be calculated); similarly, a subset of "2" in each single-phase three-way array structure of 1 in 2 out (for which the error value has been calculated) of the upper hierarchy may be "1" in another "1 in 2 array unit" of the lower hierarchy (for which the error has yet to be calculated). In this way, error reference values are transmitted in a cascading manner, and verification is performed on the electric energy sensors in the single-phase three-way array structure of each independent 1 in and 2 out electric energy sensor.
When the delta X deviation exists between the true error value and the reference error value of the error reference standard device, the delta X deviation is utilized to compensate the equal error data of the corresponding electric energy sensors, and error-free data are obtained. When the reference error value of the error reference standard device is the same as the true error value of the error reference standard device, the error-free data corresponding to each electric energy sensor is obtained directly according to the true error value of the error reference standard device.
The method for sharing the standard refers to the following steps: the electric energy sensor with known or unknown error is connected into any branch pipeline of 1 single-phase three-way array structure with 1 in and 2 out in series, and is used as an error reference standard device, so that the calculation of the electric energy sensor with the single-phase three-way array structure with 1 in and 2 out can be completed. Then, the same known or unknown error electric energy sensor is connected into any branch pipeline of the adjacent 1-in and 2-out single-phase three-way array structure through pipeline switching, and is used as an error reference standard device, so that the error calculation of the adjacent 1-in and 2-out single-phase three-way array structure electric energy sensor can be completed. By sharing the standard method, the error value can be transferred between 2 independent 1-in and 2-out single-phase three-way array structure electric energy sensors.
Specifically, the electric energy measurement system comprises a first electric energy sensor with a 1-in and 2-out single-phase three-way array structure and a second electric energy sensor with a 1-in and 2-out single-phase three-way array structure, wherein the first electric energy sensor with the 1-in and 2-out single-phase three-way array structure and the second electric energy sensor with the 1-in and 2-out single-phase three-way array structure are mutually independent;
The electric energy measurement system further comprises an error reference standard device, wherein the error reference standard device is arranged on a pipeline branch of the electric energy sensor of the first 1-in and 2-out single-phase three-way array structure, the error reference standard device is also arranged on a pipeline branch of the electric energy sensor of the second 1-in and 2-out single-phase three-way array structure, and a switch is arranged on the selected pipeline branch; and switching a pipeline branch into which the error reference standard device is connected by setting a state of a switch so as to selectively connect the error reference standard device in series to the first 1-in 2-out single-phase three-way array structure electric energy sensor or the second 1-in 2-out single-phase three-way array structure electric energy sensor.
For example, referring to fig. 3, the corresponding circuit structure design can be used for switching the pipeline by controlling the on-off of the corresponding switch. As shown in fig. 3, taking the electric energy sensor with the single-phase three-way array structure with the 1 in and 2 out as an example for explanation, the electric energy sensor with the single-phase three-way array structure with the 1 in and 2 out and the electric energy sensor with the single-phase three-way array structure with the second 1 in and 2 out are mutually independent, the error reference standard device is simultaneously connected in series on one pipeline branch of the electric energy sensor with the single-phase three-way array structure with the first 1 in and 2 out and the electric energy sensor with the single-phase three-way array structure with the second 1 in and 2 out, meanwhile, a switch K1 is arranged on a pipeline branch of the electric energy sensor with the single-phase three-way array structure with the first 1 in and 2 out, the switch K1 is connected in parallel with the error reference standard device, the switch K1 is connected in series with the electric energy sensor on a selected branch, and a switch K2 is arranged between the error reference standard device and the electric energy sensor on the selected branch; meanwhile, a switch K3 is arranged on a pipeline branch of the electric energy sensor of the second 1-in 2-out single-phase three-way array structure, the 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 to K4 can be specifically switch channels of relays, and the on-off of the corresponding switches K1 to K4 is controlled through the relays.
In actual use, when the switch K1 is set to be in an open state, the switch K2 is set to be in a closed state, the switch K3 is set to be in a closed state, and the switch K4 is set to be in an open state, the error reference standard device is connected in series to a pipeline corresponding to the electric energy sensor of the first 1 in 2 out single-phase three-way array structure, and is used as an error reference standard to perform error checking on the electric energy sensor of the first 1 in 2 out single-phase three-way array structure.
In actual use, when the switch K1 is set to be in the closed state, the switch K2 is set to be in the open state, the switch K3 is set to be in the open state, and the switch K4 is set to be in the closed state, the error reference standard device is connected in series to a pipeline corresponding to the electric energy sensor of the second 1 in 2 out single-phase three-way array structure, and is used as an error reference standard to perform error checking on the electric energy sensor of the second 1 in 2 out single-phase three-way array structure.
In this embodiment, the error calibration of the two independent 1 in and 2 out single-phase three-way array electric energy sensors can be completed by one error reference standard device, and the normal operation of each other is not affected. In the electric energy sensor with the 1-in and 2-out single-phase three-way array structure, the standard sharing method is similar, and is not repeated here.
The serial standard method refers to the following steps: the electric energy sensor with known error is connected into any branch pipeline of the electric energy sensor with the 1-in and 2-out single-phase three-way array structure in series and used as an error reference standard device, so that the error calculation of the electric energy sensor with the 1-in and 2-out single-phase three-way array structure can be completed.
The post-correction method refers to: and selecting 1 branch electric energy sensors in the electric energy sensor with the 1-in and 2-out single-phase three-way array structure, giving reference error values to the branch electric energy sensors, and calculating errors of all the electric energy sensors in the electric energy sensor with the 1-in and 2-out single-phase three-way array structure. Taking down any branch pipeline electric energy sensor from the electric energy sensor with the single-phase three-way array structure of 1 in and 2 out, measuring the real error value by using a standard experiment method, calculating the deviation between the set reference error value and the real error value by using the set reference error value and the real error value, correcting the errors of all the electric energy sensors by using the deviation, obtaining the real errors of all the electric energy sensors, correcting the original measured data, and obtaining error-free data.
Further, the electric energy measurement 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 electric energy data acquired by the microprocessor from each electric energy sensor to the cloud server.
The preset number of I/O ports in the microprocessor are set to be connected with the data transmission ends of the preset number of electric energy sensors. The acquisition end of the electric energy sensor sub-meter positioned at the last stage is coupled with a user line and/or a user pipeline which are responsible for detection, and is used for feeding back the actual use condition of the corresponding user to the microprocessor; the data transmission module is connected with the microprocessor, and transmits detection data acquired from each electric energy sensor to the cloud server when the detection data are needed.
In combination with the above embodiments, the electric energy measurement system provided by the invention includes at least two electric energy sensors with 1 in and 2 out single-phase three-way array structures, wherein the electric energy sensors with 1 in and 2 out single-phase three-way array structures not only can construct an electric energy measurement system with any scale, but also can divide the electric energy measurement system with larger scale into a plurality of electric energy arrays with smaller scale through the electric energy sensors with 1 in and 2 out single-phase three-way array structures, each electric energy array meets the law of relative conservation of energy, and the error of the electric energy sensor in each electric energy array is calculated respectively, so that the influence of multiple collinearity of electric energy data calculation caused by the similarity of habit of using electric energy of a user is weakened, and the calculation efficiency and calculation precision are improved.
Example 5:
in practical use, the electric energy sensor with the 1 in and 2 out single-phase three-way array structure has various application situations, for example, the electric energy sensor with the 1 in and 2 out single-phase three-way array structure can be used as an error meter calibrating tool of an electric energy meter, and the electric energy sensor with the 1 in and 2 out single-phase three-way array structure is used as an error-free sensor system for calibrating errors of the electric energy sensors connected in series on a pipeline branch of the electric energy meter by calculating errors and compensating errors; the electric energy sensor with the 1-in and 2-out single-phase three-way array structure can be used as a subsystem of a netlike electric energy sensor system; the principle design and the manufacturing of the electric energy meter of the electric energy sensor adopting the 1-in and 2-out single-phase three-way array structure are adopted.
In addition, the electric energy sensor with a 1-in and 2-out single-phase three-way array structure can be connected in an expansion mode, and the method for cascading the expansion electric energy measurement system comprises the following steps of: by cascading 2 single-phase three-way array structure electric energy sensors with 1 in and 2 out, an electric energy measurement system capable of measuring errors of the electric energy sensors can be constructed, specifically, "1" in the single-phase three-way array structure electric energy sensors with 1 in and 2 out of the lower layer is connected to the single-phase three-way array structure electric energy sensors with 1 in and 2 out of the upper layer (error to be calculated) to form a part of "2", and the single-phase three-way array structure electric energy sensors with 2 1 in and 2 out of the single-phase three-way array structure electric energy sensors are connected to form a new electric energy measurement system, wherein error values of all the electric energy sensors can be calculated.
In addition, the 1 in 2 out single-phase three-way array structure electric energy sensor can cope with the sudden fault of the sensor, for example, for 3 electric energy sensors in the 1 in 2 out single-phase three-way array structure electric energy sensor, if the jth electric energy sensor has sudden fault, the electric energy measuring function is lost, and the electric energy data w 'of the sudden fault electric energy sensor can be obtained through the following formula' j ：
By the above way, the risk of losing electrical energy data due to the operation of the electrical energy sensor can be avoided.
In this embodiment, the minimum electric energy measurement system can be constructed by the electric energy sensor with the 1-in and 2-out single-phase three-way array structure, so that the scale of the electric energy measurement system is reduced as much as possible, the multiple collinearity influence of electric energy data calculation caused by the habit similarity of using electric energy of a user is weakened, and the error calculation accuracy of the electric energy sensor is improved.
Next, the use of the electric energy sensor in the 1 in 2 out single-phase three-way array structure in the electric meter box is exemplified.
In combination with fig. 4, a product form of an ammeter box is shown, the electric energy sensor can be a sampling resistor, the electricity consumption condition of a user is obtained through the sampling resistor, wherein the sampling resistor (sub-meter) of the electric energy sensor with the single-phase three-way array structure of the last stage 1 in and 2 out is used for being coupled with a circuit of the user so as to detect the electricity consumption condition of the user, the sampling resistors of the electric energy sensors with the single-phase three-way array structure of the other stages 1 in and 2 out are integrated and arranged in a meter corrector, so that a large-scale power supply system is divided into a plurality of small power supply systems, the meter corrector can conduct meter correction in a grading manner when performing meter correction, the data processing quantity of each time is reduced, the calculation efficiency is improved, and the habit similarity of the electricity consumption of the user can be weakened to cause multiple collinearing influence of electric energy data calculation.
In combination with fig. 5, a product form of another electric meter box is shown, the electric energy sensor can be a sampling resistor, and the electricity consumption condition of the user is obtained through the sampling resistor, wherein the sampling resistor (sub-meter) of the electric energy sensor with the single-phase three-way array structure of the last stage 1 in and 2 out is used for coupling with the circuit of the user so as to detect the electricity consumption condition of the user, the sampling resistors of the electric energy sensors with the single-phase three-way array structure of the other stages 1 in and 2 out are all integrated and arranged in the meter corrector, in addition, the electric meter box further comprises a user electric meter, and the user electric meter is connected with the sampling resistor positioned at the most terminal so as to display the electricity consumption of the user. Therefore, the large-scale power supply system is divided into a plurality of small power supply systems, when the meter calibrating device is used for calibrating the meter, the meter calibrating can be carried out in a grading manner, the data processing amount of each time is reduced, the calculation efficiency can be improved, and the multiple collinearity influence on electric energy data calculation caused by the habit similarity of the electric quantity used by a user can be weakened.
The ammeter case that fig. 5 shows has set up the user ammeter at the user side, and the user ammeter is used for showing the power consumption of user, and the user can learn its power consumption condition through the electric quantity display of user ammeter, to a certain extent, provides the convenience for the user. However, currently, the user electric meter is generally disposed at a fixed location of the building, and the user generally cannot see the display of the user electric meter, that is, the display function of the electric meter box in the form of fig. 5 is generally not used, so that the electric meter box illustrated in fig. 4 can be popularized in order to reduce the cost while ensuring the electric quantity detection function.
The electricity meter box shown in fig. 4 is not provided with a user electricity meter on the user side, that is, the function of displaying the electricity is not provided, when the user needs to acquire the electricity consumption condition of the user, the connection can be established with the corresponding cloud server, and the electricity consumption condition of the user can be acquired through a network, so that the component of the user electricity meter can be reduced, the installation of the user electricity meter can be reduced, and the product cost and the installation cost can be greatly reduced.
Example 6:
in combination with the electric energy measurement system of the above embodiment, the present embodiment provides a measurement method of an electric energy system constituted by a three-way array of the electric energy measurement system, the electric energy measurement system includes: the electric energy sensor of the single-phase three-way array structure of at least two stages 1 in and 2 out comprises an electric energy sensor total surface unit positioned at an inlet side and 2 electric energy sensor sub-meter units positioned at an outlet side, wherein the electric energy sensor total surface unit positioned at the inlet side and the 2 electric energy sensor sub-meter units positioned at the outlet side form a relative energy conservation relation; the meter dividing unit is used for dividing the electric energy sensor of the adjacent two-stage 1 in 2 out single-phase three-way array structure into meter units at the outlet side of the electric energy sensor of the upper-stage 1 in 2 out single-phase three-way array structure, and is a total table of the electric energy sensors of the lower-stage 1 in 2 out single-phase three-way array structure at the inlet side;
Referring to fig. 6, the method for measuring the electric energy system formed by the three-way array comprises the following steps:
step 10: an error reference standard device is assigned or built into the power measurement system and assigned a reference error value.
In this embodiment, in order to calibrate the original data, an error reference standard device is set first, and then the original measurement data is calibrated based on the error reference standard device, so as to eliminate errors and obtain more accurate electric energy data. There are at least the following ways of setting up the error reference standard means.
Mode one: by adopting a post calibration method, the determining an error reference standard device, specifically, selecting an electric energy sensor as an error reference standard device in the electric energy measurement system, obtaining a Δx deviation between an actual error value of the error reference standard device and the reference error value, as shown in fig. 7, specifically includes:
step 1111: the selected power sensor is removed from the power measurement system and the actual error value of the selected power sensor is measured.
Referring to fig. 2, the electric energy measurement system includes a plurality of electric energy sensors, wherein the electric energy sensors of the single-phase three-way array structure for each stage 1 in and 2 out each comprise 3 electric energy sensors, wherein one electric energy sensor is used for measuring incoming line energy, 2 electric energy sensor sub-meters are used for measuring branching energy, and 3 electric energy sensors form a correct network topology relationship, and whether the network topology relationship is correct or not can be determined according to a correlation method.
For the single-phase three-way array structure of the electric energy sensor of each stage 1 in and 2 out, one electric energy sensor can be selected from any one of 3 electric energy sensors to serve as an error reference standard device.
Step 1112: subtracting the reference error value of the selected power sensor from the actual error value of the selected power sensor to obtain the DeltaX deviation.
In an alternative embodiment, a numerical value is self-specified as an error specified value according to actual conditions, or a numerical value can be selected from a standard measurement error interval as the specified value. The specified value may be in and out of the true measurement error of the power sensor, and may not truly reflect the measurement error of the power sensor. The difference between the error appointed value of the error reference standard device and the true error value of the error reference standard device is equal to the DeltaX deviation.
Mode two: by adopting a serial standard method, the error determining reference standard device is specifically that a first electric energy sensor unit with a known actual error value is connected in series on a branch where any electric energy sensor in the electric energy measurement system is located, and then the reference measurement error of each electric energy sensor in the electric energy measurement system is obtained through calculation, as shown in fig. 8, the specific electric energy measurement system includes:
Step 1121: and in the operation process of the electric energy measurement system, respectively reading the electric energy data of the first electric energy sensor unit and the electric energy data of the electric energy sensor on the branch, and calculating the actual error value of the electric energy sensor on the selected branch.
Step 1122: and the electric energy sensor on the selected branch is used as an error reference standard device, and the calculated actual error value of the electric energy sensor on the selected branch is used for calculating the actual error of each electric energy sensor in the electric energy measurement system.
In comparison, the second mode is more suitable for the example scenario of the specific application, but in the implementation process of the second mode, it is also recommended to set an interface for accessing the first power sensor unit in a certain branch or branches of the existing power measurement system.
Mode three: adopting a cascade calculation transmission method, wherein the electric energy measurement system and the adjacent first electric energy measurement system and/or second electric energy measurement system can construct a relative second electric energy conservation environment, and then determining an error reference standard device, specifically, arbitrarily selecting an electric energy sensor with a known actual error value from the first electric energy measurement system and/or the second electric energy measurement system as the error reference standard device; the calculating obtains a reference measurement error of each electric energy sensor in the electric energy measurement system, as shown in fig. 9, specifically including:
Step 1131: and establishing an energy equation according to the second electric energy conservation environment by the electric energy measurement system and each electric energy sensor in the adjacent first electric energy measurement system and/or second electric energy measurement system.
Step 1132: and calculating the actual error of each electric energy sensor in the electric energy measurement system according to the actual error value of the error reference standard device.
In this embodiment, the electric energy sensor having the actual error value in the adjacent electric energy measurement system may be selected as the error reference standard device according to the adjacent electric energy measurement system having the known actual error value, and the reference error value determined according to this method is the actual error value (also described as the true error), so that the actual error value of each electric energy sensor in the electric energy measurement system to be measured can be calculated under the circumstance that the electric energy measurement system to be measured is based on the adjacent first electric energy measurement system and/or the adjacent second electric energy measurement system can construct a relative second electric energy conservation environment.
In the third mode, when the error reference standard device is set, the measurement error of each electric energy sensor obtained according to the following step 12 is the actual error value of each electric energy sensor, and after the corresponding original data is calibrated through the actual error value, error-free electric energy data can be obtained. In general, the third mode is the most intelligent, but the specific implementation of the third mode also puts higher demands on the architecture relationship, the sharing of data and the computing capacity of each electric energy measurement system in the current environment.
Mode four: by adopting a standard sharing mode, one electric energy sensor with known or unknown error is connected into any branch pipeline of 1 single-phase three-way array structure with 1 in and 2 out in series, and the electric energy sensor with 1 in and 2 out single-phase three-way array structure can be used as an error reference standard device, so that the electric energy sensor error calculation of the single-phase three-way array structure with 1 in and 2 out can be completed. Then, the same known or unknown error electric energy sensor is connected into any branch pipeline of the adjacent 1-in and 2-out single-phase three-way array structure through pipeline switching, and is used as an error reference standard device, so that the error calculation of the adjacent 1-in and 2-out single-phase three-way array structure electric energy sensor can be completed. By sharing the standard method, the error value can be transferred between 2 independent 1-in and 2-out single-phase three-way array structure electric energy sensors.
Specifically, the electric energy measurement system comprises a first electric energy sensor with a 1-in 2-out single-phase three-way array structure and a second electric energy sensor with a 1-in 2-out single-phase three-way array structure, wherein the first electric energy sensor with the 1-in 2-out single-phase three-way array structure and the second electric energy sensor with the 1-in 2-out single-phase three-way array structure are mutually independent, namely, the first electric energy sensor with the 1-in 2-out single-phase three-way array structure is subordinate to one electric energy measurement system, and the second electric energy sensor with the 1-in 2-out single-phase three-way array structure is subordinate to the other electric energy measurement system; the electric energy measurement system further comprises an error reference standard device, wherein the error reference standard device is arranged on a pipeline branch of the electric energy sensor of the first 1-in and 2-out single-phase three-way array structure, the error reference standard device is also arranged on a pipeline branch of the electric energy sensor of the second 1-in and 2-out single-phase three-way array structure, and a switch is arranged on the selected pipeline branch; and switching a pipeline branch into which the error reference standard device is connected by setting a state of a switch so as to selectively connect the error reference standard device in series to the first 1-in 2-out single-phase three-way array structure electric energy sensor or the second 1-in 2-out single-phase three-way array structure electric energy sensor.
In this embodiment, the error calibration of the two independent 1 in and 2 out single-phase three-way array electric energy sensors can be completed by one error reference standard device, and the normal operation of each other is not affected.
In other ways, a standard meter can also be introduced into the power measurement system, which standard meter serves as an error reference standard. The arrangement of the error reference standard device is selected according to the actual situation, and is not particularly limited here.
Step 11: and acquiring the original measurement data of the electric energy sensors on all input branches and output branches in the electric energy measurement system and the original measurement data of the error reference standard device.
In this embodiment, the raw measurement data of the individual power sensors may be automatically collected by the concentrator and transferred to the database server. Wherein, because of errors in the electrical energy sensor, correspondingly, the original measurement data has errors.
Step 12: and calculating a reference measurement error value of the electric energy sensor in the electric energy sensor with the single-phase three-way array structure with the 1 in and 2 out of the error reference standard device by utilizing a relative energy conservation relation.
In this embodiment, a cascade progressive calculation manner may be adopted to transfer the reference error value, so that the scale of data calculation may be reduced, the calculation efficiency may be improved, and the co-linearity problem caused by the similarity of the user electric energy data may be reduced.
Step 13: and acquiring an electric energy array with a higher-level or lower-level 1-in-2-out relation with the electric energy sensor with the reference measurement error value, and calculating the reference measurement error value of the electric energy sensor in the single-phase three-way array structure corresponding to the higher-level or lower-level 1-in-2-out relation by utilizing the relative energy conservation relation.
Step 14: and calculating the reference measurement error value process of the electric energy sensors in the 1-in and 2-out single-phase three-way array structure through one or more previous or next stages, thereby obtaining the reference measurement error values of all the electric energy sensors in the electric energy measurement system, and compensating the original measurement data according to the reference measurement error value of each electric energy sensor to obtain the equal-error data or error-free data.
In the embodiment, the corresponding original measurement data is compensated by using the reference measurement error value to obtain the equal error data of the reference error value of each electric energy sensor relative to the error reference standard device; when the delta X deviation exists between the true error value and the reference error value of the error reference standard device, compensating the equal error data of the corresponding electric energy sensors by using the delta X deviation to obtain error-free data; or,
And directly calculating error-free data corresponding to each electric energy sensor according to the true error value of the error reference standard device.
When the setting modes of the error reference standard device are different, the data calibration modes corresponding to the step 12 are also different.
When the error reference standard device is set in the second mode or the standard meter is directly referenced as the error reference standard device, the measurement error of each electric energy sensor in the electric energy measurement system is obtained based on the error reference standard device, the measurement error is the actual error value of each electric energy sensor, and then the corresponding original measurement data is calibrated based on the actual error value of each electric energy sensor, so that error-free data are obtained.
When the error reference standard device is selected in the foregoing manner, the measurement error of each electric energy sensor in the electric energy measurement system is obtained based on the error reference standard device, where the measurement error is a reference measurement error of each electric energy sensor, and may not be equal to an actual error value. And calibrating the original measurement data according to the reference measurement errors to obtain compensated electric energy data, wherein the compensated electric energy data corresponding to each electric energy sensor is equal error data aiming at the electric energy measurement system, and error-free data can be obtained after the equal errors are required to be eliminated.
Due to the equal error theory, the actual error value of each electric energy sensor minus the reference measurement error thereof corresponds to the Δx deviation. Therefore, an electric energy sensor can be arbitrarily selected to obtain the actual error value thereof so as to obtain the delta X deviation of the electric energy measurement system, and the compensated electric energy data of other electric energy sensors are calibrated to obtain error-free electric energy data.
In this embodiment, after the Δx deviation is obtained, the compensated electric energy data of each electric energy sensor is calibrated according to the Δx deviation, so as to obtain error-free electric energy data of each electric energy sensor, where the error-free electric energy data is data that has no errors in theory or data that has negligible errors.
Example 7:
fig. 10 is a schematic structural diagram of an error calibration device according to an embodiment of the present invention. The error calibration device of the present embodiment includes one or more processors 41 and a memory 42. In fig. 10, a processor 41 is taken as an example.
The processor 41 and the memory 42 may be connected by a bus or otherwise, which is illustrated in fig. 10 as a bus connection.
The memory 42 is used as a non-volatile computer-readable storage medium for storing a non-volatile software program and a non-volatile computer-executable program, and is used for storing the measurement methods in embodiments 2 to 6. The processor 41 performs the measurement method by running non-volatile software programs and instructions stored in the memory 42.
Memory 42 may include high-speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, memory 42 may optionally include memory located remotely from processor 41, which may be connected to processor 41 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
It should be noted that, because the content of information interaction and execution process between modules and units in the above-mentioned device and system is based on the same concept as the processing method embodiment of the present invention, specific content may be referred to the description in the method embodiment of the present invention, and will not be repeated here.
Those of ordinary skill in the art will appreciate that all or a portion of the steps in the various methods of the embodiments may be implemented by a program that instructs associated hardware, the program may be stored on a computer readable storage medium, the storage medium may include: read Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk, optical disk, or the like.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (13)
1. The three-phase electric energy sensor of the three-way array structure comprises a 1-in 2-out or 2-in 1-out three-phase electric energy splitting structure, wherein the three-phase electric energy splitting structure forms a three-phase electric energy system conforming to the electric energy conservation relation, electric energy sensing units are respectively arranged on the pipelines of the 1-in 2-out or 2-in 1-out, a mathematical model is established according to the electric energy conservation relation in a mode of connecting an error reference standard device in series or a mode of designating the error reference standard device on any pipeline, and calculation of measuring errors of the electric energy sensing units is completed by utilizing electric energy data acquired by the electric energy sensing units and the error reference standard device, wherein the three-phase electric energy splitting structure comprises relatively independent 3 sets of 1-in 2-out or 2-in 1-out single-phase three-way electric energy sensors formed by independent A-phase, B-phase and C-phase single-phase electric energy sensing units under the 3-meter electric energy metering method; or, the three-phase electric energy splitting structure comprises 2 sets of independent single-phase electric energy sensing units forming 2 sets of single-phase three-way array structure electric energy sensors with 1-in and 2-out or 2-in and 1-out, and any set of single-phase three-way array structure electric energy sensors are used for the three-phase three-way array structure electric energy sensors; wherein, the electric energy sensing unit is embodied as each single-phase electric energy sensing unit, specifically: establishing a mathematical model by utilizing the electric energy conservation relation of an electric energy system, calculating electric energy measurement errors of electric energy sensing units respectively arranged on inlet and outlet pipelines of the single-phase three-way array structure electric energy sensor by using electric energy data detected by the three-phase electric energy shunt structure and the error reference standard device, compensating the newly measured electric energy data by using the calculated errors, and continuously and iteratively calculating the measurement errors of the electric energy sensing units to obtain the single-phase electric energy sensor of the three-way array structure of the single-phase three-way array structure electric energy sensor without errors or equal errors; in an electrical energy system, comprising: the three-phase electric energy sensor of the three-way array structure comprises at least two stages, wherein the three-phase electric energy sensor corresponding to each stage of three-way array structure comprises 1 electric energy sensing total surface unit positioned on the inflow side and 2 electric energy sensing sub-meter units positioned on the outflow side; in a single-phase three-way array structure electric energy sensor, the electric energy of 1 electric energy sensing total surface unit and 2 electric energy sensing sub-meter units form a relative electric energy conservation relation;
The three-phase electric energy sensor of the three-way array structure of the 1 in and 2 out of the adjacent two stages is positioned in the same phase of electric energy, and the electric energy sensing sub-meter unit positioned on the outflow side of the three-phase electric energy sensor of the three-way array structure of the 1 in and 2 out of the upper stage is an electric energy sensing total surface unit positioned on the inflow side of the three-phase electric energy sensor of the three-way array structure of the 1 in and 2 out of the lower stage;
the error checking method comprises the following steps:
designating or establishing an error reference standard device in the electric energy measurement system and giving a reference error value to the error reference standard device;
collecting original measurement data of three-phase electric energy sensors on all input branches and output branches in the electric energy measurement system and original measurement data of the error reference standard device;
calculating to obtain reference measurement error values of three-phase electric energy sensors in the three-way array with the 1-in and 2-out of the error reference standard device by utilizing a mathematical model established by relative electric energy conservation relation aiming at the three-way array with the 1-in and 2-out of the error reference standard device;
acquiring a three-phase electric energy sensor of a three-way array structure with a higher-level or lower-level 1-in-2-out relation with the three-phase electric energy sensor of the three-way array structure with the calculated reference measurement error value, and calculating the reference measurement error value of an electric energy sensing unit in the three-way array with the corresponding higher-level or lower-level 1-in-2-out relation by utilizing the relative electric energy conservation relation;
Calculating the reference measurement error value process of the three-phase electric energy sensors in the three-way array with 1 in and 2 out through one or more previous or next steps, so as to obtain the reference measurement error values of the three-phase electric energy sensors with all three-way array structures in the electric energy measurement system, and compensating the original measurement data according to the reference measurement error values of the three-phase electric energy sensors with each three-way array structure to obtain equal-error data or error-free data;
the method comprises the steps of connecting an electric energy sensor with known or unknown errors in series into any branch pipeline of 1 single-phase three-way array structure with 1 in and 2 out, and using the branch pipeline as an error reference standard device to finish the calculation of the electric energy sensor with the single-phase three-way array structure with 1 in and 2 out; the same known or unknown error electric energy sensor is connected into any branch pipeline of the adjacent 1-in and 2-out single-phase three-way array structure through pipeline switching, and is used as an error reference standard device to finish the error calculation of the adjacent 1-in and 2-out single-phase three-way array structure electric energy sensor.
2. The electric energy measurement system composed of three-phase electric energy sensors of three-way array structure according to claim 1, wherein the electric energy measurement system comprises n three-phase electric energy sensors of three-way array structure, wherein the three-phase electric energy sensors of each three-way array structure are mutually independent;
The electric energy measurement system further comprises an error reference standard device, and the error reference standard device is connected in series to any pipeline branch of any three-way array structure of the three-phase electric energy sensors of the n three-way array structures.
3. The electric energy measurement system composed of three-phase electric energy sensors with the three-way array structure according to claim 2, wherein if the electric energy measurement system adopts a 2-meter electric energy measurement method, the electric energy measurement system comprises at least 2 single-phase electric energy measurement error reference standard devices, and the single-phase electric energy measurement error reference standard devices are connected in series with two single-phase electric energy sensors of the three-phase electric energy sensors with the three-way array structure with any 2-meter electric energy measurement system; if the electric energy measuring system adopts a 3-meter electric energy measuring method or comprises at least 3 single-phase error reference standard devices, the 3 single-phase error reference standard devices are respectively connected in series on branches in 3 single-phase electric energy sensors of any three-way array structure of the electric energy measuring system;
when the error reference standard device is arranged on a branch of the three-way array of which the last stage 1 is in and out, transmitting an error reference value in a progressive calculation mode from a lower level to an upper level so as to calibrate an electric energy measurement system and obtain error-free data or equal error data;
When the error reference standard device is arranged on a branch of the three-way array of which the uppermost stage 1 is in and out of the 2 th stage, an error reference value is transmitted in a progressive calculation mode from the upper layer to the lower layer so as to calibrate the electric energy measurement system, and error-free data or equal error data are obtained;
when the error reference standard device is arranged on a branch of the three-way array with the middle stage 1 in and 2 out, an error reference value is transmitted by a mode of progressive calculation from the middle stage to the upper layer and a mode of progressive calculation from the middle stage to the lower layer so as to calibrate the electric energy measurement system and obtain error-free data or equal error data.
4. The system for measuring electric energy formed by three-phase electric energy sensors with three-way array structure according to claim 2, wherein the electric energy measuring system comprises a microprocessor and a data transmission module, the microprocessor is connected with each three-phase electric energy sensor, the data transmission module is connected with the microprocessor and is used for calculating error edges of the three-phase electric energy sensors with three-way array structure and/or sending electric energy data collected from each three-phase electric energy sensor to a cloud server.
5. The electric energy measurement system composed of three-phase electric energy sensors with three-way array structure according to claim 1, wherein the three-phase electric energy sensors with three-way array structure are composed of 3 single-phase three-way array structure electric energy sensors with three-way array structure of 1 meter method, and specifically:
each single-phase 1-in 2-out or 2-in 1-out three-way array structure electric energy sensor forms a single-phase electric energy system which accords with the electric energy conservation relation, wherein single-phase electric energy sensing units are respectively arranged on single-phase pipelines of the 1-in 2-out or 2-in 1-out, a mathematical model is built according to the electric energy conservation relation by connecting a single-phase error reference standard device in series on any pipeline, electric energy data acquired by the single-phase electric energy sensing units and the single-phase error reference standard device are utilized to finish calculation of measurement errors of the single-phase electric energy sensing units, after the measurement errors of the A, B, C three-phase single-phase electric energy sensing units are respectively calculated, the phase-combining electric energy measurement errors of the three-phase electric energy sensor of the three-way array structure are obtained through phase-combining calculation, the three-phase electric energy data obtained through new measurement of the phase-combining error compensation obtained through calculation are continuously iterated and calculated, and the measurement errors of the electric energy sensing units are compensated, and the three-phase electric energy sensor of the three-way array structure of the three-way structure with no error or equal error is obtained.
6. The electric energy measurement system composed of three-phase electric energy sensors with three-way array structure according to claim 1, wherein the three-phase electric energy sensors with three-way array structure are composed of 2 single-phase three-way array structure electric energy sensors with three-way array structure of 1 meter method, and specifically:
the three-phase electric energy sensor comprises 1 single-phase three-way array structure electric energy sensors, C-phase current and BC inter-phase voltage, wherein the 1 single-phase three-way array structure electric energy sensors are connected with A-phase current and AB inter-phase voltage, the other 1 single-phase three-way array structure electric energy sensors are connected with C-phase current and BC inter-phase voltage, each 1-in 2-out or 2-in 1-out single-way array structure electric energy sensor forms a single-phase electric energy system conforming to an electric energy conservation relation, single-phase electric energy sensing units are respectively arranged on the 1-in 2-out or 2-in 1-out single-phase pipelines, a single-phase error reference standard device is connected in series on any pipeline, a mathematical model is built according to the electric energy conservation relation, calculation of measurement errors of the single-phase electric energy sensing units is completed by utilizing electric energy data acquired by the single-phase electric energy sensing units and the single-phase error reference standard device, after the measurement errors of the 2 single-phase electric energy sensing units are respectively calculated, the combined phase electric energy measurement errors of the three-phase electric energy sensor of the three-way array structure are obtained, the three-phase electric energy sensor of the three-phase electric energy array structure is obtained by combining phase calculation and the combined phase electric energy data obtained by new measurement compensation of the combined phase error compensation, and the three-phase electric energy sensor of the three-phase structure of the three-phase electric energy sensor structure without errors or the error or the like.
7. The measuring method of the electric energy measuring system formed by three-phase electric energy sensors of the three-way array structure is characterized in that the electric energy system formed by three-phase electric energy sensors of the three-way array structure comprises the following steps: the three-phase electric energy sensor of the three-way array structure of at least two stages 1 in and 2 out, wherein the three-way array of each stage 1 in and 2 out comprises an electric energy sensing total surface positioned on the inflow side and 2 three-phase electric energy sensor sub-meter units positioned on the outflow side, and the electric energy sensing total surface positioned on the inflow side and the 2 three-phase electric energy sensor sub-meter units positioned on the outflow side form a relative electric energy conservation relation;
the three-phase electric energy sensor meter dividing unit is used for dividing three-way arrays of 1 in and 2 out of adjacent two stages into three-way arrays of 1 in and 2 out of the upper stage into three-way arrays of 1 in and 2 out of the lower stage into three-way arrays of the lower stage;
the error checking method comprises the following steps:
designating or establishing an error reference standard device in the electric energy measurement system and giving a reference error value to the error reference standard device;
collecting original measurement data of three-phase electric energy sensors on all input branches and output branches in the electric energy measurement system and original measurement data of the error reference standard device;
Calculating to obtain reference measurement error values of three-phase electric energy sensors in the three-way array with the 1-in and 2-out of the error reference standard device by utilizing a mathematical model established by relative electric energy conservation relation aiming at the three-way array with the 1-in and 2-out of the error reference standard device;
acquiring a three-phase electric energy sensor of a three-way array structure with a higher-level or lower-level 1-in-2-out relation with the three-phase electric energy sensor of the three-way array structure with the calculated reference measurement error value, and calculating the reference measurement error value of an electric energy sensing unit in the three-way array with the corresponding higher-level or lower-level 1-in-2-out relation by utilizing the relative electric energy conservation relation;
calculating the reference measurement error value process of the three-phase electric energy sensors in the three-way array with 1 in and 2 out through one or more previous or next steps, so as to obtain the reference measurement error values of the three-phase electric energy sensors with all three-way array structures in the electric energy measurement system, and compensating the original measurement data according to the reference measurement error values of the three-phase electric energy sensors with each three-way array structure to obtain equal-error data or error-free data;
the method comprises the steps of connecting an electric energy sensor with known or unknown errors in series into any branch pipeline of 1 single-phase three-way array structure with 1 in and 2 out, and using the branch pipeline as an error reference standard device to finish the calculation of the electric energy sensor with the single-phase three-way array structure with 1 in and 2 out; the same known or unknown error electric energy sensor is connected into any branch pipeline of the adjacent 1-in and 2-out single-phase three-way array structure through pipeline switching, and is used as an error reference standard device to finish the error calculation of the adjacent 1-in and 2-out single-phase three-way array structure electric energy sensor.
8. The method for measuring the three-phase power sensor-structured three-phase power measuring system according to claim 7, wherein the compensating the original measurement data according to the reference measurement error value of each power sensor unit to obtain the equal-error data or the error-free data comprises:
compensating corresponding original measurement data by using the reference measurement error value to obtain equal error data of the reference error value of each three-phase electric energy sensor relative to the error reference standard device; when the delta X deviation exists between the true error value and the reference error value of the error reference standard device, compensating the equal error data of the corresponding three-phase electric energy sensors by using the delta X deviation to obtain error-free data; or,
and directly calculating to obtain error-free data of the three-phase electric energy sensors corresponding to the three-way array structures according to the true error value of the error reference standard device.
9. The method for measuring the electric energy of the electric energy measuring system composed of three-phase electric energy sensors with three-way array structure according to claim 8, wherein the Δx deviation between the true error value and the reference error value of the error reference standard device is obtained, specifically:
Taking down the three-phase electric energy sensor selected as an error reference standard device, and measuring the true error value of the taken-down three-phase electric energy sensor; and subtracting the reference error value of the selected three-phase electric energy sensor from the actual error value of the removed three-phase electric energy sensor to obtain delta X deviation.
10. The method for measuring the electric energy of the electric energy measuring system composed of three-phase electric energy sensors with three-way array structure according to claim 8, wherein the error reference standard device and the assigned reference error value are determined specifically:
a first three-phase electric energy sensor unit with a known true error value is connected in series on any pipeline branch of the three-phase electric energy sensor of any three-way array structure of the electric energy measurement system;
in the operation process of the electric energy measurement system, respectively reading electric energy data of the first three-phase electric energy sensor unit and electric energy data of the three-phase electric energy sensor on the selected branch, and calculating the real error value of the three-phase electric energy sensor on the selected branch;
the three-phase electric energy sensors on the selected branch are used as error reference standard devices, and the calculated true error values of the three-phase electric energy sensors on the selected branch are used for calculating the true error of each connected three-phase electric energy sensor in the electric energy measurement system.
11. The method for measuring the power measuring system composed of three-phase power sensors of three-way array structure according to claim 8, wherein the reference error value of the error reference standard device comprises:
in the electric energy measurement system, after any three-phase electric energy sensor is selected as an error reference standard device, a preset reference error value is matched with a measurement error of the error reference standard device, wherein the difference value between the preset reference error value of the error reference standard device and an actual error value of the error reference standard device is equal to DeltaX deviation.
12. The method for measuring the electric energy of the electric energy measuring system composed of three-phase electric energy sensors with the three-way array structure according to claim 8, wherein the method for measuring the electric energy of the electric energy system composed of the three-way array structure further comprises:
after the original measurement data of the three-phase electric energy sensor are collected, determining the similarity condition of each original measurement data;
if the similarity of at least two groups of original measurement data is larger than a preset similarity threshold, adopting a hierarchical calculation mode to calculate measurement errors of each three-phase electric energy sensor in a cascading way so as to verify the original measurement data;
if the similarity of each group of original measurement data is smaller than a preset similarity threshold value, dividing the three-phase electric energy sensors in the three-way array of the last stage 1 in and 2 out into a meter and a total electric energy sensor table in the three-way array of the uppermost stage 1 in and 2 out, and obtaining measurement errors of the corresponding three-phase electric energy sensors by utilizing a relative electric energy conservation relationship so as to verify the original measurement data.
13. The method for measuring the three-phase power sensor-structured three-way power measuring system according to claim 7, wherein the error-corrected measurement data of the three-way array is used to complete the continuous iterative calculation of the error of the power measuring device in the power system on the corresponding pipeline after the layout of the three-way array in the power system is completed and the calculation of the power measuring errors of the three-phase power sensors respectively provided on the 1-inlet and 2-outlet lines is completed.
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