CN114063003A - Electric energy meter measurement error detection method and system based on cell, and storage medium - Google Patents
Electric energy meter measurement error detection method and system based on cell, and storage medium Download PDFInfo
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- CN114063003A CN114063003A CN202210008538.1A CN202210008538A CN114063003A CN 114063003 A CN114063003 A CN 114063003A CN 202210008538 A CN202210008538 A CN 202210008538A CN 114063003 A CN114063003 A CN 114063003A
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Abstract
The invention discloses a method, a system and a storage medium for detecting measurement errors of an electric energy meter based on a cell area, relating to the technical field of electric energy meter measurement and comprising the following steps: dividing a station area into small electric quantity station areas, setting a total electric energy meter, a branch electric energy meter and a standard electric energy meter, taking electric quantity readings of the total electric energy meter, a plurality of branch electric energy meter readings and electric quantity readings of each user electric energy meter, judging whether the user electric energy meter generates electric energy measurement errors in a period to be detected according to the electric quantity readings of the total electric energy meter and the electric quantity readings of the user electric energy meters, judging the small electric quantity station area range generating the measurement errors according to the electric quantity readings of the branch electric energy meters and the electric quantity readings of the user electric energy meters if the user electric energy meters fail, and comparing the electric quantity readings of the user electric energy meters with the electric quantity readings of the standard electric energy meters after determining the target small electric quantity station area range to obtain the user electric energy meter generating the measurement failures. The method can quickly and accurately find the fault electric energy meter, simplifies the steps and reduces the detection cost.
Description
Technical Field
The invention relates to the technical field of electric energy meter measurement, in particular to a method and a system for detecting measurement errors of an electric energy meter based on a cell area and a storage medium.
Background
In an electric power system, a transformer area refers to a power supply area or range of a certain transformer, and a small-power transformer area is a small-range power supply area. The electric energy meter is a metering device for calculating the electric energy consumption condition in a small electric quantity platform area, collects related electric utilization event information through the electric energy meter storing and metering the electric utilization condition data of a user, sets fixed time, establishes a communication relation with an upper computer, transmits the data out, and carries out electric energy trade settlement according to the data.
Whether the electric energy meter can realize accurate calculation directly has important influence on benefits of power grid companies, users and power supply enterprises. The conditions of errors, faults, electricity stealing and the like occurring in the running process of the electric energy meter can be timely and accurately found, so that the benefits of a power company and the rights and interests of users can be maintained. Accurate monitoring of the operating state of an electric energy meter is an important task at the management level of electric power companies. However, in actual situations, it is difficult to accurately monitor the operation state of the electric energy meter and timely find errors and faults, and the conventional monitoring mode is usually on-site inspection or periodic removal and detection, which results in huge waste of manpower and material resources.
Therefore, how to detect the electric energy meter in the distribution room in real time guarantees that the electric energy meter with electric energy metering faults is accurately detected while saving manpower and material resources, and the technical personnel in the field need to solve the problems.
Disclosure of Invention
In view of this, the invention provides a method, a system and a storage medium for detecting measurement errors of an electric energy meter based on a cell.
In order to achieve the above purpose, the invention provides the following technical scheme:
a method for detecting the measurement error of an electric energy meter based on a cell comprises the following steps:
step 1, dividing a transformer area into N small-electric-quantity transformer areas;
step 2, setting a total electric energy meter, N branch electric energy meters and N standard electric energy meters;
step 3, the electric quantity reading of the total electric energy meter, the electric quantity readings of the N branch electric energy meters and the electric quantity reading of each user electric energy meter at the current moment are taken at intervals, and then the measured value of the total electric quantity of the distribution room, the measured value of the electric quantity of the N small electric quantity distribution rooms and the measured value of the electric quantity of each user in the time interval t are obtained;
step 4, acquiring total fixed line loss in the transformer area according to the measured value of the total electric quantity of the transformer area;
step 5, judging whether the total electricity consumption in the distribution area conforms to the law of conservation of energy or not according to the total electricity measurement value of the distribution area, the electricity measurement value of each user and the total fixed line loss in the distribution area within the time interval t, if so, indicating that the electric energy meters of the users in the distribution area normally work, and if not, entering step 6;
step 6, acquiring fixed line loss in each small electric quantity distribution area according to the electric quantity measured values of the N small electric quantity distribution areas;
step 7, judging whether the total electric quantity consumption in each small electric quantity distribution area conforms to an energy conservation law or not according to the electric quantity measured value of the N small electric quantity distribution areas in the time interval t, the electric quantity measured value of each user and the fixed line loss in each small electric quantity distribution area, and obtaining small electric quantity distribution areas which do not conform to the energy conservation law;
step 8, in the small electric quantity distribution area which does not accord with the energy conservation law, a console is used for sequentially connecting the standard electric energy meter in the small electric quantity distribution area to each user electric line, and the electric quantity measurement value of the standard electric energy meter and the electric quantity measurement value of the user in a time interval t are obtained;
and 9, judging whether the difference value between the measured value of the standard electric energy meter and the measured value of the user electric energy meter exceeds a set threshold value or not, if so, indicating that the user electric energy meter generates an electric quantity measurement error, and obtaining an electric quantity measurement error value of the user electric energy meter.
Optionally, after the user electric energy meter generating the electric quantity measurement error is obtained in step 9, the user electric energy meter is repaired or replaced.
Optionally, in step 1, the distribution of the user zones in the distribution area is divided into N small electric quantity distribution areas.
Optionally, the total electric energy meter is arranged in the total electric transmission line and is used for obtaining a total electric quantity measured value in the distribution room, the branch electric energy meter is arranged in each small electric quantity distribution room and is used for obtaining an electric quantity measured value in the corresponding small electric quantity distribution room, and the standard electric energy meter is arranged in each small electric quantity distribution room and is used for obtaining a standard electric quantity measured value of each user.
Optionally, in step 3, according to the time interval balanced sampling method, the electric quantity readings of the total electric energy meter, the electric quantity readings of the N branch electric energy meters, and the electric quantity reading of each user electric energy meter at the current time are taken every time interval t, that is, the operation of step 3 is performed every time interval t.
Optionally, in step 5, the condition that the total amount of electricity used in the station area within the time interval t meets the law of conservation of energy is as follows: the total power measurement of the cell = each user power measurement + the total fixed line loss in the cell.
Optionally, in step 7, the condition that the total electricity consumption of each small electricity platform region in the time interval t meets the energy conservation law is as follows: the small-power distribution area power measurement value = each user power measurement value of the small-power distribution area + fixed line loss in the small-power distribution area.
The invention also discloses an electric energy meter measurement error detection system based on the cell, which comprises the user electric energy meters arranged on each user electric line, a control console, a total electric energy meter, N branch electric energy meters and N standard electric energy meters;
an electrical switch is arranged between the standard electric energy meter and the user electric circuit, the console is connected with the electrical switch, and the standard electric energy meter is controlled to be connected to the user electric circuit by controlling the conduction state of the electrical switch;
the console is respectively connected with the total electric energy meter, the N branch electric energy meters and the N standard electric energy meters and is used for taking electric quantity readings of each electric energy meter, calculating difference values according to the electric quantity readings and obtaining electric quantity measurement values of each electric energy meter;
the total electric energy meter is arranged in a total electric transmission line and used for obtaining a total electric quantity measured value in a distribution area, the branch electric energy meters are arranged in each small electric quantity distribution area and used for obtaining electric quantity measured values in the corresponding small electric quantity distribution areas, and the standard electric energy meters are arranged in each small electric quantity distribution area and used for obtaining standard electric quantity measured values of each user.
A computer storage medium having a computer program stored thereon, the computer program, when executed by a processor, implementing the steps of a method for cell-based measurement error detection of electric energy meters as recited in any of the above.
The technical scheme can show that the invention discloses and provides a method, a system and a storage medium for detecting the measurement error of the electric energy meter based on the cell area, and compared with the prior art, the method, the system and the storage medium have the following beneficial effects:
the method divides a station area into a plurality of small electric quantity station areas, sets a total electric energy meter in each station area, sets a branch electric energy meter and a standard electric energy meter in each small electric quantity station area, and judges whether a user electric energy meter generates an electric energy measurement error or not in a period to be detected according to the total electric energy meter metering value and the user electric energy meter metering value. And if the user electric energy meter fails in the time period, judging the range of the small electric quantity distribution area with the measurement error through the metering value of the branch electric energy meter and the metering value of the user electric energy meter. After the target small electric quantity distribution area range is determined, the control console sequentially controls the standard electric energy meters to be connected to the user electric line, the user electric energy meter metering value and the standard electric energy meter metering value are compared, and finally the user electric energy meters with the measurement faults are determined. And then the fault electric energy meter can be replaced or maintained. The method can quickly and accurately find the fault electric energy meter. And the method of the invention firstly judges whether the user electric energy meter generates the electric energy measuring error in the period to be detected, if not, the subsequent operation is not carried out, thereby simplifying the steps and reducing the detection cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a flow chart of the method steps of the present invention;
FIG. 2 is a schematic diagram of the system of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a method for detecting the measurement error of an electric energy meter based on a cell, which is shown in figure 1 and comprises the following steps:
step 1, dividing a distribution area into N small electric quantity distribution areas according to distribution of user intervals in the distribution area.
Step 2, setting a total electric energy meter, N branch electric energy meters and N standard electric energy meters; the total electric energy meter is arranged in a total electric transmission line and used for obtaining a total electric quantity measured value in a distribution area, the branch electric energy meters are arranged in each small electric quantity distribution area and used for obtaining electric quantity measured values in the corresponding small electric quantity distribution areas, and the standard electric energy meters are arranged in each small electric quantity distribution area and used for obtaining standard electric quantity measured values of each user.
And 3, according to a time interval balanced sampling method, the total electric energy meter electric quantity reading, the N branch electric energy meter electric quantity readings and each user electric energy meter electric quantity reading at the current moment are taken at intervals, and then the station area total electric quantity measurement value, the N small electric quantity station area electric quantity measurement values and each user electric quantity measurement value in the time interval t are obtained.
And (3) calling the electric quantity reading of the current electric energy meter, the electric quantity readings of the N branch electric energy meters and the electric quantity reading of each user electric energy meter at intervals of time t, namely, carrying out the operation of the step (3) at intervals of time t.
And 4, acquiring the total fixed line loss in the transformer area according to the measured value of the total electric quantity of the transformer area.
The total fixed line loss = total electricity measurement value of the transformer area line loss rate, wherein the line loss rate can be obtained by collecting in advance under the condition of normal power supply, and the line loss rate = (line loss electricity/power supply quantity) × 100% = (power supply quantity-power sale quantity)/power supply quantity = (1-power sale quantity/power supply quantity) × 100%.
Step 5, judging whether the total electricity consumption in the distribution area conforms to the law of conservation of energy or not according to the total electricity measurement value of the distribution area in the time interval t, the electricity measurement value of each user and the total fixed line loss in the distribution area: total electric quantity measured value F of transformer areaA= sum of measured values of electricity of each subscriber in district
+ total fixed line loss S in station areaAIf yes, indicating that the user electric energy meter in the transformer area works normally, and if not, entering step 6.
And 6, acquiring fixed line loss in each small electric quantity transformer area according to the electric quantity measured values of the N small electric quantity transformer areas, wherein the fixed line loss of the small electric quantity transformer areas = the measured value of the electric quantity of the small electric quantity transformer areas.
Step 7, judging whether the total electricity consumption in each small electricity distribution area conforms to the law of energy conservation or not according to the N small electricity distribution area electricity measurement values in the time interval t, each user electricity measurement value and the fixed line loss in each small electricity distribution area: the electric quantity measurement value of the small electric quantity distribution area = the electric quantity measurement value of each user of the small electric quantity distribution area + the fixed line loss in the small electric quantity distribution area, so that the small electric quantity distribution area which is not in accordance with the law of conservation of energy is obtained, and the electric energy meter of the user generating the electric quantity measurement error is located in the small electric quantity distribution area.
And 8, in the small electric quantity distribution area which does not accord with the energy conservation law, using the console to sequentially connect the standard electric energy meter in the small electric quantity distribution area into each user electric line, and obtaining the electric quantity measurement value of the standard electric energy meter and the electric quantity measurement value of the user in the time interval t.
Specifically, the console controls the corresponding power switch to enable the standard electric energy meter to be connected to a line using circuit of a target user.
And 9, judging whether the difference value between the measured value of the standard electric energy meter and the measured value of the user electric energy meter exceeds a set threshold value or not, if so, indicating that the user electric energy meter generates an electric quantity measurement error, and obtaining an electric quantity measurement error value of the user electric energy meter.
In another embodiment, after the user electric energy meter generating the electric quantity measurement error is obtained in step 9, the user electric energy meter is repaired or replaced.
The embodiment of the invention also provides an electric energy meter measurement error detection system based on the cell, which is shown in fig. 2 and comprises a user electric energy meter arranged on each user electric line, a control console, a total electric energy meter, N branch electric energy meters and N standard electric energy meters; the console is not shown in fig. 2.
An electrical switch is arranged between the standard electric energy meter and the user electric circuit, the console is connected with the electrical switch, and the standard electric energy meter is controlled to be connected to the user electric circuit by controlling the conduction state of the electrical switch;
the console is respectively connected with the total electric energy meter, the N branch electric energy meters and the N standard electric energy meters and is used for taking electric quantity readings of each electric energy meter, calculating difference values according to the electric quantity readings and obtaining electric quantity measurement values of each electric energy meter;
the total electric energy meter is arranged in a total electric transmission line and used for obtaining a total electric quantity measured value in a distribution area, the branch electric energy meters are arranged in each small electric quantity distribution area and used for obtaining electric quantity measured values in the corresponding small electric quantity distribution areas, and the standard electric energy meters are arranged in each small electric quantity distribution area and used for obtaining standard electric quantity measured values of each user.
In a specific embodiment, after a small electric quantity distribution area where the user electric energy meter generating the electric quantity measurement error is located is known, each user electric energy meter in the small electric quantity distribution area is detected. Referring to fig. 2, if the small electric quantity station area where the user electric energy meter generating the electric quantity measurement error is located is the small electric quantity station area where the branch electric energy meter 1 is located, all the user electric energy meters in the small electric quantity station area need to be detected. Firstly, detecting the user electric energy meter 11, controlling the on-off control to open the electric switch 11.1, closing the electric switch 11.2, keeping the line of other users unchanged, acquiring the electric quantity change value of the user electric energy meter 11 and the electric quantity change value of the standard electric energy meter 1 within a time interval t, calculating a difference value, judging whether the difference value exceeds a set threshold value, and if the difference value exceeds the set threshold value, indicating that the electric energy measurement fault occurs in the user electric energy meter 11. And closing the electrical switch 11.1, opening the electrical switch 11.2, opening the electrical switch 12.1, closing the electrical switch 12.2, and detecting the user electric energy meter 12. According to the method, whether all the user electric energy meters in the small electric quantity distribution area normally operate or not is detected in sequence.
Specifically, the electrical switch may employ a relay.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A method for detecting the measurement error of an electric energy meter based on a cell is characterized by comprising the following steps:
step 1, dividing a transformer area into N small-electric-quantity transformer areas;
step 2, setting a total electric energy meter, N branch electric energy meters and N standard electric energy meters;
step 3, the electric quantity reading of the total electric energy meter, the electric quantity readings of the N branch electric energy meters and the electric quantity reading of each user electric energy meter at the current moment are taken at intervals, and then the measured value of the total electric quantity of the distribution room, the measured value of the electric quantity of the N small electric quantity distribution rooms and the measured value of the electric quantity of each user in the time interval t are obtained;
step 4, acquiring total fixed line loss in the transformer area according to the measured value of the total electric quantity of the transformer area;
step 5, judging whether the total electricity consumption in the distribution area conforms to the law of conservation of energy or not according to the total electricity measurement value of the distribution area, the electricity measurement value of each user and the total fixed line loss in the distribution area within the time interval t, if so, indicating that the electric energy meters of the users in the distribution area normally work, and if not, entering step 6;
step 6, acquiring fixed line loss in each small electric quantity distribution area according to the electric quantity measured values of the N small electric quantity distribution areas;
step 7, judging whether the total electric quantity consumption in each small electric quantity distribution area conforms to an energy conservation law or not according to the electric quantity measured value of the N small electric quantity distribution areas in the time interval t, the electric quantity measured value of each user and the fixed line loss in each small electric quantity distribution area, and obtaining small electric quantity distribution areas which do not conform to the energy conservation law;
step 8, in the small electric quantity distribution area which does not accord with the energy conservation law, a console is used for sequentially connecting the standard electric energy meter in the small electric quantity distribution area to each user electric line, and the electric quantity measurement value of the standard electric energy meter and the electric quantity measurement value of the user in a time interval t are obtained;
and 9, judging whether the difference value between the measured value of the standard electric energy meter and the measured value of the user electric energy meter exceeds a set threshold value or not, if so, indicating that the user electric energy meter generates an electric quantity measurement error, and obtaining an electric quantity measurement error value of the user electric energy meter.
2. The method as claimed in claim 1, wherein the user electric energy meter having the electric energy measurement error is repaired or replaced after the user electric energy meter having the electric energy measurement error is obtained in the step 9.
3. The method as claimed in claim 1, wherein in step 1, the distribution of subscriber zones in the cell is divided into N small electric energy cells.
4. The method according to claim 1, wherein the total power meter is disposed in a total power transmission line and used for obtaining a total power measurement value in a cell, the branch power meter is disposed in each cell and used for obtaining a power measurement value in a corresponding cell, and the standard power meter is disposed in each cell and used for obtaining a standard power measurement value for each user.
5. The method for detecting the measurement error of the electric energy meter based on the cell as claimed in claim 1, wherein in step 3, the total electric energy meter electric quantity reading at the current moment, the electric quantity readings of the N branch electric energy meters and the electric quantity reading of each user electric energy meter are taken every time interval t according to the time interval balanced sampling method, i.e. the operation of step 3 is performed every time interval t.
6. The method for detecting the measurement error of the electric energy meter based on the cell as claimed in claim 1, wherein in the step 5, the condition that the total electric quantity of the cell in the time interval t meets the energy conservation law is as follows: the total power measurement of the cell = each user power measurement + the total fixed line loss in the cell.
7. The method for detecting the measurement error of the electric energy meter based on the cell as claimed in claim 1, wherein in the step 7, the condition that the total electric quantity of each small electric energy cell area in the time interval t conforms to the law of conservation of energy is as follows: the small-power distribution area power measurement value = each user power measurement value of the small-power distribution area + fixed line loss in the small-power distribution area.
8. A system for detecting the measurement error of an electric energy meter based on a cell comprises a user electric energy meter arranged on each user electric line, and is characterized by further comprising a control console, a total electric energy meter, N branch electric energy meters and N standard electric energy meters;
an electrical switch is arranged between the standard electric energy meter and the user electric circuit, the console is connected with the electrical switch, and the standard electric energy meter is controlled to be connected to the user electric circuit by controlling the conduction state of the electrical switch;
the console is respectively connected with the total electric energy meter, the N branch electric energy meters and the N standard electric energy meters and is used for taking electric quantity readings of each electric energy meter, calculating difference values according to the electric quantity readings and obtaining electric quantity measurement values of each electric energy meter;
the total electric energy meter is arranged in a total electric transmission line and used for obtaining a total electric quantity measured value in a distribution area, the branch electric energy meters are arranged in each small electric quantity distribution area and used for obtaining electric quantity measured values in the corresponding small electric quantity distribution areas, and the standard electric energy meters are arranged in each small electric quantity distribution area and used for obtaining standard electric quantity measured values of each user.
9. A computer storage medium, characterized in that the computer storage medium has stored thereon a computer program which, when being executed by a processor, implements the steps of a method for cell-based measurement error detection of electric energy meters according to any of claims 1 to 7.
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