CN114152805B - Electric energy meter structure for checking errors by users at home and error checking method - Google Patents
Electric energy meter structure for checking errors by users at home and error checking method Download PDFInfo
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention discloses an electric energy meter structure for checking errors by users and a checking error method thereof. The method is suitable for a home scene environment, so that the error correction of the home electric energy meter can be completed under the condition of minimum circuit adjustment required by a user, the multiple co-linearity influence of electric energy data calculation caused by the similarity of habit of using electric energy of the user can be weakened, and the calculation efficiency and calculation precision are improved.
Description
Technical Field
The invention belongs to the technical field of intelligent meter measurement, and particularly relates to an electric energy meter structure for checking errors by a user at home and a checking error method.
Background
Currently, a large number of flow sensors, such as electricity meters, water meters, gas meters, or other flow meters, are used because they are 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 an electric energy meter structure and an error checking method for checking errors of users, which aim to not only construct an electric energy measuring system with any scale through an electric energy sensor with a three-way array structure, but also divide the electric energy measuring system with a larger scale into a plurality of electric energy arrays with smaller scales through the electric energy sensor with the three-way array structure, each electric energy array meets the relative energy conservation law, calculates the errors of the electric energy sensor in each electric energy array respectively, weakens the influence of multiple collinearity on electric energy data calculation caused by the similarity of habits of the users using electric energy, improves the calculation efficiency and the calculation accuracy, and solves the technical problem of multiple collinearity of the electric energy data.
In order to achieve the above purpose, in a first aspect, the present invention provides an electric energy meter structure for checking errors by users at home, wherein an error self-checking circuit with a three-way array structure is added in a traditional electric energy meter body to form an electric energy meter for checking errors by users at home.
Preferably, the electric energy meter structure is a 1-in and 2-out electric energy split structure, the electric energy split structure forms an electric energy meter structure conforming to the electric energy conservation relation, wherein 1 inlet pipeline is provided with a total meter module, 2 outlet pipelines are respectively provided with an auxiliary meter module 1 and an auxiliary meter module 2 which are connected in series with error reference standard devices on a user power line, the total meter module is connected in series with a bus pipeline where the user electric energy meter module is located, and the auxiliary meter module 1 is connected in series with the bus pipeline of the user electric energy meter module and is positioned at the downstream of the total meter module, and belongs to the user power line of normal electricity; the auxiliary meter module 2 is connected with the error reference standard device in series and is arranged on a branch pipeline, and the branch pipeline is coupled with the total meter module and the connecting pipeline of the auxiliary meter module 1 to form a three-way structure, and the auxiliary meter module is specifically:
And establishing a mathematical model by utilizing the electric energy conservation relation of the electric energy meter structure, calculating the electric energy measurement error of the total meter module according to the electric energy data detected by the total meter module and the auxiliary meter module 1 of the three-way structure and the electric energy data detected by the auxiliary meter module 2 or the error reference standard device, and continuously and iteratively calculating the measurement error of the total meter module and the auxiliary meter by utilizing the calculated error to compensate the newly measured electric energy data to obtain the total meter module without errors or equal errors, and calculating the error of the user electric energy meter module by utilizing the electric energy data of the total meter module, the error of the total meter module and the electric energy data of the user electric energy meter module to realize the measurement of the error of the user electric energy meter module so as to realize the self-calibration of the electric energy meter error.
Preferably, the electric energy meter structure comprises a microprocessor and a data transmission module, wherein the microprocessor is connected with each user electric energy metering module, the total meter metering module, the auxiliary meter module 1, the auxiliary meter module 2 and the error reference standard device, the data transmission module is connected with the microprocessor and used for calculating the error edge of the electric energy meter structure for checking errors by self and/or sending electric energy data collected from each user electric energy metering module, the total meter metering module, the auxiliary meter module 1, the auxiliary meter module 2 and the error reference standard device to the cloud server.
Preferably, the compensating the original measurement data according to the reference measurement error value of the error reference standard device 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 reference error values of the electric energy metering module, the total meter metering module, the auxiliary meter module 1 and the auxiliary meter module 2 of each user relative to an 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 corresponding error data of each user electric energy metering module, the total meter metering module, the auxiliary meter module 1, the auxiliary meter module 2 and the like by utilizing the delta X deviation to obtain error-free data; or alternatively
And directly calculating to obtain error-free data corresponding to the user electric energy metering module, the total meter metering module, the auxiliary meter module 1 and the auxiliary meter module 2 in each three-way array structure according to the actual error value of the error reference standard device.
Preferably, the error reference standard device comprises:
In the electric energy measurement system, after any one of the user electric energy measurement module, the total table measurement module, the auxiliary table module 1 and the auxiliary table module 2 is selected as an error reference standard device, a preset reference error value is matched for the measurement error of the error reference standard device, wherein the difference value between the preset reference error value of the error reference standard device and the true error value of the error reference standard device is equal to DeltaX deviation.
Preferably, after completing the layout of the three-way array in the electric energy meter structure and completing the calculation of the electric energy measurement errors of the total meter module, the auxiliary meter module 1 and the auxiliary meter module 2 respectively arranged on the 1-inlet and 2-outlet lines, the continuous iterative calculation of the errors of the user electric energy meter modules on the corresponding pipelines is completed by using the measurement data with the corrected errors in the three-way array.
Preferably, the pipeline of the second outlet where the error reference standard device is located is led out from a single pipeline which is originally only provided with the user electric energy metering module; after passing through the node position of the corresponding leading-out second outlet pipeline, the original single pipeline forms a first outlet pipeline corresponding to the second outlet pipeline, and a secondary table is additionally arranged on the corresponding first outlet pipeline;
and setting an error reference standard device on the second outlet pipeline, and selecting an electric appliance with a working state meeting a preset condition as energy consumption equipment on the second outlet pipeline.
Preferably, the preset condition is that the energy consumption of the equipment on the first outlet pipeline is controlled within 10 times of the energy consumption of the equipment on the second outlet pipeline.
Preferably, if the user is provided with a branching device at home, the corresponding branching device is used for respectively transmitting the electric energy from the user electric energy metering module to different areas in the room through respective tripping switches; the method is led out from a single pipeline which is originally provided with only a user electric energy metering module, and specifically comprises the following steps:
a node for leading out a second outlet pipeline is arranged between the outlet end of the user electric energy metering module and the inlet of the tripping switch; or alternatively
And directly selecting the outlet ends of the two tripping switches to serve as the first outlet pipeline and the second outlet pipeline respectively, and setting other tripping switches in an open state and only setting the tripping switches corresponding to the first outlet pipeline and the second outlet pipeline in a closed state when checking errors.
Preferably, a deconcentrator is preset on a main line before the user household deconcentration is finished at the downstream of the original user electric energy metering module, and the deconcentrator forms a 1-in and 2-out three-way array structure; the auxiliary meter is sleeved on a first outgoing line corresponding to a normal user electric line in the three-way array structure in a voltage transformer and/or current transformer mode; the error reference standard device is arranged on the second output line in a serial connection mode.
In a second aspect, the invention also provides a method for checking errors of a user's own electric energy meter structure, the electric energy meter structure is a 1-in and 2-out electric energy split structure, the electric energy split structure forms an electric energy meter structure conforming to the electric energy conservation relation, a total meter module is arranged on 1 inlet pipeline, auxiliary meters and error reference standard devices on user power lines are respectively arranged on 2 outlet pipelines, wherein the total meter module is connected in series on a bus pipeline where the user electric energy meter module is located, and the auxiliary meters are connected in series on the bus pipeline of the user electric energy meter module and are positioned at the downstream of the total meter module, and belong to the user power lines of normal electricity consumption; the error reference standard device is arranged on a branch pipeline, and the branch pipeline is coupled with the total surface metering module and the connecting pipeline of the auxiliary meter to form a three-way structure, and the error reference standard device is specifically:
And establishing a mathematical model by utilizing the electric energy conservation relation of the electric energy meter structure, calculating the electric energy measurement error of the total meter module according to the electric energy data detected by the total meter module, the auxiliary meter and the error reference standard device of the three-way structure, and continuously and iteratively calculating the measurement errors of the total meter module and the auxiliary meter by utilizing the calculated error to compensate the electric energy data obtained by new measurement so as to obtain the total meter module without errors or with equal errors.
Preferably, the compensating the original measurement data according to the reference measurement error value of the error reference standard device 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 reference error values of the electric energy metering module, the total meter metering module, the auxiliary meter module 1 and the auxiliary meter module 2 of each user relative to an 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 corresponding error data of each user electric energy metering module, the total meter metering module, the auxiliary meter module 1, the auxiliary meter module 2 and the like by utilizing the delta X deviation to obtain error-free data; or alternatively
And directly calculating to obtain error-free data corresponding to the user electric energy metering module, the total meter metering module, the auxiliary meter module 1 and the auxiliary meter module 2 in each three-way array structure according to the actual error value of the error reference standard device.
In general, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects: the invention provides an electric energy meter structure and an error checking method for checking errors of a user, which are suitable for a home scene environment, and can finish error checking of the electric energy meter of the user under the condition of minimum circuit adjustment required by the user.
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 the structural relationship of each electric energy sensor in an electric energy meter structure for checking errors of users themselves according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a method for checking errors of an electric energy meter structure by a user according to an embodiment of the present invention;
Fig. 3 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.
The invention is technically characterized in that a set of error self-checking circuit with a three-way array structure is added in a traditional electric energy meter body: the user electric energy metering module is an electric energy meter (for example, the electric energy meter can be directly expressed as a household ammeter for a user) for user charging and settlement, and the error self-checking circuit with the three-way array structure is formed by the fact that through the total surface metering module which is connected with the user electric energy metering module in series, electric energy flows into the user household in 2 paths, one path is a normal electricity utilization 'user electricity utilization line 1', and the upper surface of the electric energy meter is connected with an auxiliary meter module 1 in series; the other path is a special meter calibrating line 2, a secondary meter module 2 is connected in series on the meter calibrating line, 1 standard electric energy meter with known errors can be connected in series, the meter calibrating line can be opened or disconnected when the user normally uses electricity, and the user electric energy metering module, the 2 secondary meter modules and the standard electric energy meter with known errors jointly form a three-way array when the meter calibrating line is opened, so that the function of calculating errors of electric energy data is realized.
The second technical characteristic of the invention is that: the 2 nd subscriber line exists, and can enter the home of a user or be placed outdoors by a third party to perform error checking on the electric energy meter.
The third technical feature of the invention is: the standard electric energy meter with known error is installed in the user's home, and can be a temporary socket with an electric energy metering function, an electric energy meter, and any electric energy metering device with detected error.
The fourth technical feature of the invention is the appearance structure of the electric energy meter: the meter body of the ' user's electric energy meter capable of checking errors ' is provided with 1 wire inlet wiring terminal and at least 2 wire outlet wiring terminals.
Example 1:
As shown in fig. 1, an electric energy meter structure for checking errors of users' own home is a 1-in and 2-out electric energy splitting structure, the electric energy splitting structure forms an electric energy meter structure conforming to the electric energy conservation relation, wherein 1 inlet pipeline is provided with a total meter module, 2 outlet pipelines are respectively provided with an auxiliary meter and an error reference standard device on a user power line, the total meter module is connected in series on a bus pipeline where the user power meter module is located, and the auxiliary meter is connected in series on the bus pipeline of the user power meter module and is positioned at the downstream of the total meter module, belonging to the user power line of normal power consumption; the error reference standard device is arranged on a branch pipeline, and the branch pipeline is coupled with the total surface metering module and the connecting pipeline of the auxiliary meter to form a three-way structure, and the error reference standard device is specifically:
And establishing a mathematical model by utilizing the electric energy conservation relation of the electric energy meter structure, calculating the electric energy measurement error of the total meter module according to the electric energy data detected by the total meter module, the auxiliary meter and the error reference standard device of the three-way structure, compensating the electric energy data obtained by new measurement by the calculated error, and continuously and iteratively calculating the measurement errors of the total meter module and the auxiliary meter to obtain the total meter module without errors or with 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 embodiment of the invention is suitable for a home scene environment, and the error correction of the home electric energy meter can be completed under the condition of minimum circuit adjustment required by a user.
The invention is different from the common sense that the error value of the user electric energy metering module is measured by directly connecting the known error standard electric energy meter in series on the user electric energy metering module, the traditional method has larger change on the original line, and the traditional method is impractical for a user to operate the main line where the user electric energy metering module is positioned and set the known error standard electric energy meter on the corresponding main line.
The electric energy meter structure for checking the errors of the user's own home provided by the embodiment of the invention can enable the common user who does not know electricity to finish checking the metering errors of the electric energy meter of the user's own home. The scheme of the invention only needs to connect the auxiliary meter module in series on the power consumption line where one trip switch is located, and connect the standard error electric energy meter in series on the power consumption line where the other trip switch is located, and at the moment, the other trip switches are all in an off state. Therefore, the whole self-home power supply system is in relative electric energy conservation relation formed by the user electric energy metering module, the auxiliary meter module and the standard electric energy meter with known errors.
In the actual use process, the auxiliary meter module and the known error standard electric energy meter can be manufactured into a structure similar to a socket type, and corresponding microprocessors and data transmission modules are arranged in corresponding plugs, so that collected output can be processed and sent correspondingly.
In combination with the embodiment of the invention, there is a preferred implementation scheme, the electric energy meter structure comprises a microprocessor and a data transmission module, the microprocessor is connected with each user electric energy metering module, the total meter metering module, the auxiliary meter module 1, the auxiliary meter module 2 and the error reference standard device, the data transmission module is connected with the microprocessor and is used for calculating the error edge of the electric energy meter structure for checking the error by self and/or sending electric energy data collected from each user electric energy metering module, the total meter metering module, the auxiliary meter module 1, the auxiliary meter module 2 and the error reference standard device to the cloud server.
In combination with the embodiment of the present invention, there is a preferred implementation scheme, and compensating the original measurement data according to the reference measurement error value of the error reference standard device, 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 reference error values of the electric energy metering module, the total meter metering module, the auxiliary meter module 1 and the auxiliary meter module 2 of each user relative to an 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 corresponding error data of each user electric energy metering module, the total meter metering module, the auxiliary meter module 1, the auxiliary meter module 2 and the like by utilizing the delta X deviation to obtain error-free data; or alternatively
And directly calculating to obtain error-free data corresponding to the user electric energy metering module, the total meter metering module, the auxiliary meter module 1 and the auxiliary meter module 2 in each three-way array structure according to the actual error value of the error reference standard device.
There is a preferred implementation manner in connection with the embodiment of the present invention, where the error refers to a reference error value of a standard device, and includes:
In the electric energy measurement system, after any one of the user electric energy measurement module, the total table measurement module, the auxiliary table module 1 and the auxiliary table module 2 is selected as an error reference standard device, a preset reference error value is matched for the measurement error of the error reference standard device, wherein the difference value between the preset reference error value of the error reference standard device and the true error value of the error reference standard device is equal to DeltaX deviation.
In combination with the embodiment of the invention, a preferred implementation scheme exists, after the layout of the three-way array in the electric energy meter structure is completed, and the calculation of the electric energy measurement errors of the total meter metering modules, the auxiliary meter modules 1 and the auxiliary meter modules 2 respectively arranged on the 1-inlet and 2-outlet lines is completed, the continuous iterative calculation of the errors of the user electric energy metering modules on the corresponding pipelines is completed by using the metering data with the corrected errors in the three-way array.
In the specific implementation process of the embodiment of the invention, the electric energy and access side where the corresponding user electric energy metering module is located are not excluded from being provided with detection interface terminals in advance after the invention is substantially popularized in the future, the corresponding detection interface terminals are used for completing the arrangement of the auxiliary meter module directly on the electric energy main line where the user enters the home (namely, the line where the user electric energy metering module is located), the auxiliary meter module is positioned at the power supply downstream of the user electric energy metering module, and the lead-out wire position of the standard device with corresponding known error is positioned between the user electric energy metering module and the auxiliary meter module, so that a better compact 1-in 2-out three-way array structure is formed. Specific: the pipeline of the second outlet where the error reference standard device is located is led out from a single pipeline which is originally only provided with a user electric energy metering module; after passing through the node position of the corresponding second outlet pipeline, the original single pipeline forms a first outlet pipeline corresponding to the second outlet pipeline, and a secondary table module 1 is additionally arranged on the corresponding first outlet pipeline;
and setting an error reference standard device on the second outlet pipeline, and selecting an electric appliance with a working state meeting a preset condition as energy consumption equipment on the second outlet pipeline.
The preset condition is that the energy consumption of the equipment on the first outlet pipeline is controlled within 10 times of the energy consumption of the equipment on the second outlet pipeline. The requirement here is to limit the mutual difference between the metering magnitude of the line where the secondary meter module is located and the metering magnitude of the line where the standard device with known error is located. For example, if the measurement magnitude of the line where the standard device with known error is located is far smaller than the measurement magnitude of the line where the secondary meter module is located, the calculation accuracy is lost correspondingly when the calculation of the relative energy conservation mathematical model is performed.
Summarizing at least two given auxiliary meter setting modules and knowing that if a user is provided with a branching device at home, the corresponding branching device is used for respectively conveying the electric energy from the user electric energy metering module to different areas in a room through respective tripping switches; the method is led out from a single pipeline which is originally provided with only a user electric energy metering module, and specifically comprises the following steps:
a node for leading out a second outlet pipeline is arranged between the outlet end of the user electric energy metering module and the inlet of the tripping switch; or alternatively
And directly selecting the outlet ends of the two tripping switches to serve as the first outlet pipeline and the second outlet pipeline respectively, and setting other tripping switches in an open state and only setting the tripping switches corresponding to the first outlet pipeline and the second outlet pipeline in a closed state when checking errors.
An optional implementation scheme is also provided in combination with the embodiment of the invention, a deconcentrator is preset on a main line before the user household deconcentration is completed at the downstream of the original user electric energy metering module, and the deconcentrator forms a 1-in and 2-out three-way array structure; the auxiliary meter is sleeved on a first outgoing line corresponding to a normal user electric line in the three-way array structure in a voltage transformer and/or current transformer mode; the error reference standard device is arranged on the second output line in a serial connection mode.
Example 2:
The invention provides a verification error method of a user's own electric energy meter structure, which is suitable for realizing the corresponding method process of the electric energy meter structure provided by the embodiment 1, wherein the electric energy meter structure is a 1-in and 2-out electric energy split structure, the electric energy split structure forms an electric energy meter structure conforming to the electric energy conservation relation, 1 inlet pipeline is provided with a total meter module, 2 outlet pipelines are respectively provided with a secondary meter module 1 and a secondary meter module 2 on a user power line which are connected with error reference standard devices in series, the total meter module is connected with a bus pipeline where the user electric energy meter module is located in series, and the secondary meter module 1 is connected with the bus pipeline of the user electric energy meter module in series and positioned at the downstream of the total meter module, belonging to the user power line of normal power consumption; the auxiliary meter module 2 is connected with the error reference standard device in series and is arranged on a branch pipeline, and the branch pipeline is coupled with the total meter module and the connecting pipeline of the auxiliary meter so as to form a three-way structure, as shown in fig. 2, the specific structure is that:
In step 201, a mathematical model is established by using the electric energy conservation relation of the electric energy meter structure, and the electric energy measurement error of the total meter module is calculated according to the electric energy data detected by the total meter module and the auxiliary meter module 1 of the three-way structure and the electric energy data detected by the auxiliary meter module 2 or the error reference standard device.
In step 202, the calculated error compensates the newly measured electric energy data, and the measurement errors of the total meter measuring module and the auxiliary meter are continuously and iteratively calculated to obtain the total meter measuring module without errors or with equal errors.
The embodiment of the invention is suitable for a home scene environment, and the error correction of the home electric energy meter can be completed under the condition of minimum circuit adjustment required by a user.
In combination with the embodiment of the present invention, there is an optional implementation scheme, and compensating the original measurement data according to the reference measurement error value of the error reference standard device, 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 reference error values of the electric energy metering module, the total meter metering module, the auxiliary meter module 1 and the auxiliary meter module 2 of each user relative to an 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 corresponding error data of each user electric energy metering module, the total meter metering module, the auxiliary meter module 1, the auxiliary meter module 2 and the like by utilizing the delta X deviation to obtain error-free data; or alternatively
And directly calculating to obtain error-free data corresponding to the user electric energy metering module, the total meter metering module, the auxiliary meter module 1 and the auxiliary meter module 2 in each three-way array structure according to the actual error value of the error reference standard device.
The error calculation and compensation of the electric energy sensor (comprising the user electric energy metering module, the total meter metering module, the auxiliary meter module 1, the auxiliary meter module 2 and the like) 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 0,x0 and w i,xi in the foregoing formula represent raw measurement data and errors of the total table of 1 power sensor corresponding to the ith power sensor, respectively. Wherein w 0、w1 and w 2 are respectively applicable to the power metering data corresponding to the total metering module in fig. 1, the power metering data of the sub-meter module 1 and the power metering data of the sub-meter module 2.
In the foregoing formula, if any one of x 0 and x i is a known quantity, the error value of the other power sensor can be calculated by reading the data 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＝w0(1+x0)
w′i＝wi(1+xi)
Wherein, w '0 and w' i represent the electric energy data of the compensated electric energy sensor total surface unit and the electric energy sensor sub-meter respectively, 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.
Example 3:
Fig. 3 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. 3, 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. 3 as a bus connection.
The memory 42, as a storage medium for storing a nonvolatile computer-readable storage medium, can be used to store nonvolatile software programs and nonvolatile computer-executable programs, such as the error detection method in embodiment 2. 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 or optical disk, and 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 (7)
1. The utility model provides a user's self-checking error's electric energy meter structure which characterized in that, it forms a user's self-checking error's electric energy meter to add a set of three-way array structure's error self-checking circuit in a traditional electric energy meter body;
the system comprises an original user electric energy metering module, a user household branching module and a user household branching module, wherein the user household branching module is arranged in the user household branching module, and the user household branching module is arranged in the user household branching module; the auxiliary meter is sleeved on a first outgoing line corresponding to a normal user power line in the three-way array structure in a voltage transformer and/or current transformer mode; the error reference standard device is arranged on the second output line in a serial connection mode;
The electric energy meter structure is a 1-in and 2-out electric energy splitting structure, the electric energy splitting structure forms an electric energy meter structure which accords with the electric energy conservation relation, a total meter metering module is arranged on 1 inlet pipelines, a first auxiliary meter module (1) and a second auxiliary meter module (2) on user power lines are respectively arranged on 2 outlet pipelines and are connected with error reference standard devices or appointed error reference standard devices in series, the total meter metering module is connected with a bus pipeline where the user power metering module is located in series, and the first auxiliary meter module (1) is connected with the bus pipeline where the user power metering module is located in series and is positioned at the downstream of the total meter metering module and belongs to user power lines for normal power consumption; the second auxiliary meter module (2) is connected with the error reference standard device in series and is arranged on a branch pipeline, and the branch pipeline is coupled with the total meter module and the connecting pipeline of the first auxiliary meter module (1) to form a three-way structure, and the specific structure is that:
Establishing a mathematical model by utilizing an electric energy conservation relation of an electric energy meter structure, calculating an electric energy measurement error of the electric energy meter structure according to electric energy data detected by a total meter measuring module and a first auxiliary meter module (1) of the three-way structure and electric energy data detected by a second auxiliary meter module (2) or an error reference standard device, compensating the newly measured electric energy data by the calculated error, continuously and iteratively calculating the measurement errors of the total meter measuring module and the auxiliary meter to obtain a total meter measuring module without errors or equal errors, calculating errors of a user electric energy measuring module by utilizing the electric energy data of the total meter measuring module, the errors of the total meter measuring module and the electric energy data of the user electric energy measuring module, and realizing the measurement of the errors of the user electric energy measuring module, thereby realizing the self-calibration of the electric energy meter errors;
After finishing the layout of the three-way array in the electric energy meter structure and finishing the calculation of the electric energy measurement errors of the total meter measuring modules, the first auxiliary meter module (1) and the second auxiliary meter module (2) which are respectively arranged on 1 inlet line and 2 outlet lines, finishing the continuous iterative calculation of the errors of the user electric energy measuring modules on the corresponding pipelines by using the measuring data after the error revision in the three-way array;
the pipeline of the second outlet where the error reference standard device is located is led out from a single pipeline which is originally only provided with a user electric energy metering module; after passing through the node position of the corresponding leading-out second outlet pipeline, the original single pipeline forms a first outlet pipeline corresponding to the second outlet pipeline, and a first auxiliary table module (1) is additionally arranged on the corresponding first outlet pipeline;
Setting an error reference standard device on the second outlet pipeline, and selecting an electric appliance with a working state meeting preset conditions as energy consumption equipment on the second outlet pipeline;
The preset condition is that the energy consumption of the equipment on the first outlet pipeline is controlled within 10 times of the energy consumption of the equipment on the second outlet pipeline.
2. The electric energy meter structure of user self-checking errors according to claim 1, characterized in that the electric energy meter structure comprises a microprocessor and a data transmission module, the microprocessor is connected with each user electric energy metering module, the total meter metering module, the first auxiliary meter module (1), the second auxiliary meter module (2) and the error reference standard device, the data transmission module is connected with the microprocessor and is used for calculating error edges of the electric energy meter structure of self-checking errors and/or sending electric energy data collected from each user electric energy metering module, the total meter metering module, the first auxiliary meter module (1), the second auxiliary meter module (2) and the error reference standard device to a cloud server.
3. The structure of a power meter for checking errors by a user's own home as set forth in claim 1, wherein compensating the raw measurement data according to the reference measurement error value of the error reference standard device to obtain the constant 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 reference error values of each user electric energy metering module, the total meter metering module, the first auxiliary meter module (1) and the second auxiliary meter module (2) 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 equivalent error data of the corresponding user electric energy metering modules, the total meter metering modules, the first auxiliary meter module (1) and the second auxiliary meter module (2) by utilizing the delta X deviation to obtain error-free data; or alternatively
And directly calculating error-free data corresponding to the user electric energy metering module, the total meter metering module, the first auxiliary meter module (1) and the second auxiliary meter module (2) in each three-way array structure according to the actual error value of the error reference standard device.
4. A user-by-home error checking power meter architecture as claimed in claim 3, wherein the reference error value of the error reference standard means comprises:
In the electric energy measurement system, after any one of the user electric energy measurement module, the total meter measurement module, the first auxiliary meter module (1) and the second auxiliary meter module (2) is selected as an error reference standard device, a preset reference error value is matched for the measurement error of the error reference standard device, wherein the difference value between the preset reference error value of the error reference standard device and the true error value of the error reference standard device is equal to DeltaX deviation.
5. The structure of claim 1, wherein if the user is provided with a branching device, the branching device is used for respectively transmitting the electric energy from the user electric energy metering module to different areas in the room through the tripping switch; the method is led out from a single pipeline which is originally provided with only a user electric energy metering module, and specifically comprises the following steps:
a node for leading out a second outlet pipeline is arranged between the outlet end of the user electric energy metering module and the inlet of the tripping switch; or alternatively
And directly selecting the outlet ends of the two tripping switches to serve as the first outlet pipeline and the second outlet pipeline respectively, and setting other tripping switches in an open state and only setting the tripping switches corresponding to the first outlet pipeline and the second outlet pipeline in a closed state when checking errors.
6. The error checking method for the electric energy meter structure of the user's home is used for the electric energy meter structure of the user's home error checking according to claim 1, and is characterized in that the electric energy meter structure is a 1-in and 2-out electric energy split structure, the electric energy split structure forms an electric energy meter structure conforming to the electric energy conservation relation, a total meter measuring module is arranged on 1 inlet pipeline, auxiliary meters and error reference standard devices on user electric wires are respectively arranged on 2 outlet pipelines, the total meter measuring module is connected in series with a bus pipeline where the user electric energy measuring module is located, and the auxiliary meters are connected in series with the bus pipeline of the user electric energy measuring module and are positioned at the downstream of the total meter measuring module, and belong to the user electric wires of normal electricity consumption; the error reference standard device is arranged on a branch pipeline, and the branch pipeline is coupled with the total surface metering module and the connecting pipeline of the auxiliary meter to form a three-way structure, and the error reference standard device is specifically:
And establishing a mathematical model by utilizing the electric energy conservation relation of the electric energy meter structure, calculating the electric energy measurement error of the total meter module according to the electric energy data detected by the total meter module, the auxiliary meter and the error reference standard device of the three-way structure, and continuously and iteratively calculating the measurement errors of the total meter module and the auxiliary meter by utilizing the calculated error to compensate the electric energy data obtained by new measurement so as to obtain the total meter module without errors or with equal errors.
7. The method for checking errors in a structure of a user's own electric energy meter according to claim 6, wherein compensating the original measurement data according to the reference measurement error value of the error reference standard device to obtain the constant error data or the error-free data comprises:
Compensating corresponding original measurement data by using the reference measurement error value to obtain equal error data of reference error values of each user electric energy metering module, the total meter metering module, the first auxiliary meter module (1) and the second auxiliary meter module (2) 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 equivalent error data of the corresponding user electric energy metering modules, the total meter metering modules, the first auxiliary meter module (1) and the second auxiliary meter module (2) by utilizing the delta X deviation to obtain error-free data; or alternatively
And directly calculating error-free data corresponding to the user electric energy metering module, the total meter metering module, the first auxiliary meter module (1) and the second auxiliary meter module (2) in each three-way array structure according to the actual error value of the error reference standard device.
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