CN114966475A - Intelligent detection system and method for abnormal wiring before power transmission of electric energy metering device - Google Patents
Intelligent detection system and method for abnormal wiring before power transmission of electric energy metering device Download PDFInfo
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- CN114966475A CN114966475A CN202210641248.0A CN202210641248A CN114966475A CN 114966475 A CN114966475 A CN 114966475A CN 202210641248 A CN202210641248 A CN 202210641248A CN 114966475 A CN114966475 A CN 114966475A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/55—Testing for incorrect line connections
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/22—Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units
Abstract
The invention discloses an intelligent detection system and method for abnormal wiring before power transmission of an electric energy metering device, wherein the system comprises: the field calibration device is used for collecting a voltage instantaneous value and a current instantaneous value, calculating the angle of a voltage vector and the angle of a current vector, drawing a phasor diagram, analyzing the wrong wiring type by combining the phasor diagram and the wrong wiring classification model to obtain a wiring error type, and sending the wiring error type to the central server; the central server is used for carrying out data transmission between the field calibration device and the field analysis expert system and is in wireless connection with the field calibration device; the field analysis specialized system is used for regularly or irregularly carrying out wiring checking phasor diagrams and wiring error types and feeding back the wiring checking result to the field checking device through the central server; the tester solves the technical problems that the tester in the prior art has great defects, the abnormal wiring type is incomplete, the networking function cannot be realized, the automatic checking function cannot be realized, and only partial wrong wiring conditions can be checked.
Description
Technical Field
The invention belongs to the technical field of electric energy metering, and particularly relates to an intelligent detection system and method for abnormal wiring before power transmission of an electric energy metering device.
Background
The abnormal wiring of the electric energy metering device is a common abnormal state of the electric energy metering device. The accurate judgment of the wiring condition of the electric energy metering device is an important content for judging the abnormal state of the electric energy metering device. The incorrect wiring mode of the metering loop is different according to the access mode of the electric energy meter and the types of the electric energy meter, such as a single-phase type, a three-phase three-wire type and a three-phase four-wire type, and the metering loop is various in types. The wiring mode of the electric energy metering device is complicated, and most of incorrect wiring causes inaccurate electric energy metering. Therefore, how to accurately judge the wiring condition of the electric energy metering device is always a concern for the power supply department.
The abnormal checking of the electric energy metering device is to complete the calculation of correction coefficient and back electric quantity by analyzing the quantity diagram when various wrong wires are connected. The SXY-2001D multifunctional three-phase electric energy meter field calibrator developed by Henan Saida electric technology Limited can identify 48 wrong wiring modes. The CL3121 three-phase electric energy meter field calibrator developed by Shenzhen Keluo electronic science and technology Limited can identify common wiring errors and calculate a correction coefficient in the state. The on-site tester for the AP2003 electric energy metering device, which is developed by Taiyuan Youtiao electronic technology limited, can complete wiring phasor diagram testing and 192 common wrong wiring checks of three-phase three-wire.
From the introduction of the check meter, the check meter in the prior art has the great defects that the abnormal wiring type is not complete, the networking function cannot be realized, the automatic check function cannot be realized, and only partial wrong wiring conditions can be checked.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the system and the method are used for solving the technical problems that the inspection instrument in the prior art has great defects, abnormal wiring is incomplete, a networking function cannot be realized, an automatic checking function cannot be realized, only partial wrong wiring conditions can be checked, and the like.
The technical scheme of the invention is as follows:
an electric energy metering device abnormal wiring intellectual detection system before power transmission, the system includes:
the field calibration device is used for collecting a voltage instantaneous value and a current instantaneous value, calculating the angle of a voltage vector and the angle of a current vector, drawing a phasor diagram, analyzing the wrong wiring type by combining the phasor diagram and the wrong wiring classification model to obtain a wiring error type, and sending the wiring error type to the central server;
the central server is used for data transmission between the field calibration device and the field analysis expert system and is in wireless connection with the field calibration device;
and the field analysis specialized system is used for regularly or irregularly carrying out wiring check phasor diagrams and wiring error types and feeding back the wiring check result to the field verification device through the central server.
The field calibration device comprises a field calibration instrument body, and an acquisition unit, a voltage-current phasor diagram module, a wrong wiring classification model module, a wrong wiring analysis module and a data transmission module which are arranged in the field calibration instrument body;
the acquisition unit is used for acquiring a voltage instantaneous value and a current instantaneous value required by the voltage-current phasor diagram module; the voltage and current phasor diagram module is used for calculating the angle of a voltage vector and the angle of a current vector through the acquisition unit and drawing a phasor diagram;
the wrong wiring classification model module is used for storing a wrong wiring classification model which is established according to the access mode of the electric energy meter and the type of the electric energy meter, and the wrong wiring classification model is a decision matrix;
the wrong wiring analysis module is used for analyzing the wrong wiring type by combining the phasor diagram and the wrong wiring classification model to obtain a wiring error type;
the data transmission module is used for sending the phase diagram and the wiring error type to the central server and receiving data from the central server.
The specific method for drawing the phasor diagram by the voltage and current phasor diagram module is as follows: the phase relation of each phase voltage quantity and the phase relation of each phase current quantity are respectively displayed and a phasor graph is drawn according to the phase angle between the measured voltage and the measured current by taking the A-phase voltage as the reference.
Wrong wiring classification model includes single-phase wiring model, and the three-phase four-wire is through CTPT wiring model, and the three-phase four-wire does not have PT wiring model, and the direct formula of getting into of three-phase four-wire model, three-phase three-wire are through CTPT wiring model, and three-phase three-wire is through CTPT wiring model.
The wiring error types comprise voltage phase error, current phase error, meter tail current in-out reverse connection, PT secondary polarity reverse connection and phase failure, CT secondary polarity reverse connection and short circuit.
The column vector of the wrong wiring classification model is the angle of the voltage vector, the row vector of the matrix is the angle of the current vector, and the element in the matrix is the angle difference between the current and voltage vectors of the corresponding row and column.
The wrong wiring type analysis module is used for analyzing the wrong wiring type to obtain the wiring error type and specifically comprises the following steps: establishing a corresponding table of judgment scores and wiring error types, extracting relevant characteristic phasors from an error wiring classification model based on voltage and current information, performing characteristic matching of voltage, current and power factor angles by combining a phasor diagram and the error wiring classification model, performing fuzzy operation, and finally obtaining judgment scores and comparing the corresponding table to obtain the wiring error types.
A wiring detection method of an intelligent abnormal wiring detection system before power transmission of an electric energy metering device comprises the following steps:
s1, collecting a voltage instantaneous value and a current instantaneous value required by a voltage current phasor diagram module by a collecting unit;
s2, calculating the angle of the voltage vector and the angle of the current vector through an acquisition unit and drawing a phasor diagram;
s3, inputting the phase diagram into an error wiring analysis module;
s4, the wrong wiring analysis module is used for analyzing the wrong wiring type by combining the phasor diagram and the wrong wiring classification model to obtain a wiring error type;
s5, the field analysis specialized system receives the phasor diagram and the wiring error type through the central server, and checks the phasor diagram and the wiring error type through regular or irregular wiring;
and S6, feeding back the wiring checking result to the field checking device by the expert through the central server.
The specific method for drawing the phasor diagram by the voltage-current phasor diagram module in the step S2 is as follows: the phase relation of each phase voltage quantity and the phase relation of each phase current quantity are respectively displayed and a phasor graph is drawn according to the phase angle between the measured voltage and the measured current by taking the A-phase voltage as the reference.
The step S4 of analyzing the wrong wiring type by the wrong wiring analysis module to obtain the wiring error type specifically includes the following steps: establishing a corresponding table of judgment scores and wiring error types, extracting relevant characteristic phasors from an error wiring classification model based on voltage and current information, performing characteristic matching of voltage, current and power factor angles by combining a phasor diagram and the error wiring classification model, performing fuzzy operation, and finally obtaining judgment scores and comparing the corresponding table to obtain the wiring error types.
The invention has the beneficial effects that:
the field verification device body generates voltage and current which can enable the electric energy metering device to carry out short-time normal charging, and whether the wiring of the electric energy metering device is correct or not is judged after corresponding deduction according to the fed back voltage and current values. The acquisition unit acquires current and voltage data required by drawing a phasor diagram, the voltage and current phasor diagram module draws a module, and the wrong wiring classification model module stores a wrong wiring classification model for judging wrong wiring classification of wiring. The wrong wiring analysis module is a decision matrix established according to the characteristics of the types of the electric energy metering devices, and can systematically and comprehensively detect the possible wrong wiring types of the electric energy metering devices in various wiring modes. The invention realizes the networking function and the automatic checking function. The central server is used for transmitting the data to the field analysis specialized system, so that the development condition of the wiring checking work of the electric energy metering device such as regular or irregular checking can be realized, the wiring error of the field checking device can be found in time, meanwhile, a provincial expert diagnosis platform is constructed through the field analysis specialized system, the provincial expert resources are fully utilized, the error wiring is corrected in time, and the metering dispute is avoided.
The tester solves the technical problems that the tester in the prior art has great defects, the abnormal wiring type is incomplete, the networking function cannot be realized, the automatic checking function cannot be realized, and only partial wrong wiring conditions can be checked.
Drawings
FIG. 1 is a functional block diagram of a system according to an embodiment of the present invention;
FIG. 2 is a flow chart of a phasor diagram according to an embodiment of the present invention;
fig. 3 is a flowchart of a wiring detection method according to an embodiment of the invention.
Detailed Description
As shown in fig. 1, the intelligent detection system for abnormal wiring before power transmission of the electric energy metering device of the present embodiment includes a field calibration device, a central server, and a field analysis customized system.
The field calibration device comprises a field calibration instrument body, and an acquisition unit, a voltage-current phasor diagram module, a wrong wiring classification model module, a wrong wiring analysis module and a data transmission module which are arranged in the field calibration instrument body. The acquisition unit is used for acquiring a voltage instantaneous value and a current instantaneous value required by the voltage-current phasor diagram module. The voltage and current phasor diagram module is used for calculating the angle of the voltage vector and the angle of the current vector through the acquisition unit and drawing a phasor diagram. And the wrong wiring classification model module is used for storing a wrong wiring classification model established according to the access mode of the electric energy meter and the type of the electric energy meter. The wrong wiring classification model is a decision matrix. And the wrong wiring analysis module is used for analyzing the wrong wiring type by combining the phasor diagram and the wrong wiring classification model to obtain the wiring error type. The data transmission module is used for sending the phase diagram and the wiring error type to the central server and receiving data from the central server. The misconnection classification model comprises a single-phase wiring model, a three-phase four-wire is connected through a CTPT (computer-to-programmable) wiring model, a three-phase four-wire is connected through a CTPT wiring model, a three-phase four-wire does not have a PT wiring model, a three-phase four-wire direct-entering type wiring model, a three-phase three-wire is connected through a CTPT wiring model, and a three-phase three-wire is connected through a CTPT wiring model. The wiring error types comprise voltage error phase, current error phase, meter tail current in and out reverse connection, PT secondary polarity reverse connection and phase failure, CT secondary polarity reverse connection and short circuit. The column vector of the wrong wiring classification model is the angle of the voltage vector, the row vector of the matrix is the angle of the current vector, and the element in the matrix is the angle difference between the current and voltage vectors of the corresponding row and column.
The center server is in wireless connection with the field calibration device. The central server is used for data transmission between the field verification device and the field analysis expert system.
And the field analysis specialized system is used for regularly or irregularly carrying out wiring check phasor diagram and wiring error type by experts and feeding back the wiring check result to the field checking device through the central server.
As shown in fig. 3, a method for performing wiring detection according to the intelligent detection system for abnormal wiring before power transmission of the electric energy metering device includes the following steps:
s1, collecting a voltage instantaneous value and a current instantaneous value required by a voltage current phasor diagram module by a collecting unit.
And S2, calculating the angle of the voltage vector and the angle of the current vector through the acquisition unit and drawing a phasor diagram. As shown in fig. 2, the specific method for drawing the phasor diagram by the voltage-current phasor diagram module in step S2 is as follows: the phase relation of each phase voltage quantity and the phase relation of each phase current quantity are respectively displayed and a phasor graph is drawn according to the phase angle between the measured voltage and the measured current by taking the A-phase voltage as the reference.
And S3, inputting the phase diagram into an error wiring analysis module.
And S4, the wrong wiring analysis module is used for analyzing the wrong wiring type by combining the phasor diagram and the wrong wiring classification model to obtain the wiring error type. The step S4 of analyzing the wrong wiring type by the wrong wiring analysis module to obtain the wiring error type specifically includes the following steps: establishing a corresponding table of judgment scores and wiring error types, extracting relevant characteristic phasors from an error wiring classification model based on voltage and current information, performing characteristic matching of voltage, current and power factor angles by combining a phasor diagram and the error wiring classification model, performing fuzzy operation, and finally obtaining judgment scores and comparing the corresponding table to obtain the wiring error types.
And S5, the field analysis specialized system receives the phasor diagram and the wiring error type through the central server, so that the expert regularly or irregularly checks the wiring of the phasor diagram and the wiring error type.
And S6, feeding back the wiring checking result to the field checking device by the expert through the central server.
Claims (10)
1. The utility model provides an unusual wiring intellectual detection system before electric energy metering device power transmission which characterized in that: the system comprises:
the field calibration device is used for acquiring a voltage instantaneous value and a current instantaneous value, calculating the angle of a voltage vector and the angle of a current vector, drawing a phasor diagram, analyzing the wrong wiring type by combining the phasor diagram and the wrong wiring classification model to obtain the wiring error type, and sending the wiring error type to the central server;
the central server is used for carrying out data transmission between the field calibration device and the field analysis expert system and is in wireless connection with the field calibration device;
and the field analysis customized system is used for regularly or irregularly carrying out wiring check phasor diagrams and wiring error types and feeding back the wiring check result to the field verification device through the central server.
2. The intelligent detection system for abnormal wiring before power transmission of the electric energy metering device according to claim 1, characterized in that: the field calibration device comprises a field calibration instrument body, and an acquisition unit, a voltage-current phasor diagram module, a wrong wiring classification model module, a wrong wiring analysis module and a data transmission module which are arranged in the field calibration instrument body;
the acquisition unit is used for acquiring a voltage instantaneous value and a current instantaneous value required by the voltage-current phasor diagram module; the voltage and current phasor diagram module is used for calculating the angle of a voltage vector and the angle of a current vector through the acquisition unit and drawing a phasor diagram;
the wrong wiring classification model module is used for storing a wrong wiring classification model which is established according to the access mode of the electric energy meter and the type of the electric energy meter, and the wrong wiring classification model is a decision matrix;
the wrong wiring analysis module is used for analyzing the wrong wiring type by combining the phasor diagram and the wrong wiring classification model to obtain a wiring error type;
the data transmission module is used for sending the phase diagram and the wiring error type to the central server and receiving data from the central server.
3. The intelligent detection system for abnormal wiring before power transmission of the electric energy metering device according to claim 2, characterized in that: the specific method for drawing the phasor diagram by the voltage and current phasor diagram module is as follows: the method comprises the steps of receiving continuous periodic sampling data acquired by an acquisition unit, calculating an effective value in one period according to a voltage instantaneous value and a current instantaneous value, respectively displaying the phase relationship of each phase voltage quantity and the phase relationship of each phase current quantity according to the phase angle between the measured voltage and the measured current by taking an A-phase voltage as a reference, and drawing a phasor diagram.
4. The intelligent detection system for abnormal wiring before power transmission of the electric energy metering device according to claim 1, characterized in that: the wrong wiring classification model comprises a single-phase wiring model, a three-phase four-wire is connected through a CTPT (computer-to-programmable) wiring model, a three-phase four-wire is connected through a CTPT wiring model, a three-phase four-wire direct-entering type wiring model, a three-phase three-wire is connected through a CTPT wiring model, and a three-phase three-wire is connected through a CTPT wiring model.
5. The intelligent detection system for abnormal wiring before power transmission of the electric energy metering device according to claim 2, characterized in that: the wiring error types comprise voltage phase error, current phase error, meter tail current in-out reverse connection, PT secondary polarity reverse connection and phase failure, CT secondary polarity reverse connection and short circuit.
6. The intelligent detection system for abnormal wiring before power transmission of the electric energy metering device according to claim 2, characterized in that: the column vector of the wrong wiring classification model is the angle of the voltage vector, the row vector of the matrix is the angle of the current vector, and the element in the matrix is the angle difference between the current and voltage vectors of the corresponding row and column.
7. The intelligent detection system for abnormal wiring before power transmission of the electric energy metering device according to claim 2, characterized in that: the wrong wiring type analysis module is used for analyzing the wrong wiring type to obtain the wiring error type and specifically comprises the following steps: establishing a corresponding table of judgment scores and wiring error types, extracting relevant characteristic phasors from an error wiring classification model based on voltage and current information, performing characteristic matching of voltage, current and power factor angles by combining a phasor diagram and the error wiring classification model, performing fuzzy operation, and finally obtaining judgment scores and comparing the corresponding table to obtain the wiring error types.
8. The method for detecting the wiring of the intelligent detection system for abnormal wiring before power transmission of the electric energy metering device as claimed in any one of claims 1 to 7, characterized in that: the method comprises the following steps:
s1, collecting a voltage instantaneous value and a current instantaneous value required by a voltage current phasor diagram module by a collecting unit;
s2, calculating the angle of the voltage vector and the angle of the current vector through an acquisition unit and drawing a phasor diagram;
s3, inputting the phase diagram into an error wiring analysis module;
s4, the wrong wiring analysis module is used for analyzing the wrong wiring type by combining the phasor diagram and the wrong wiring classification model to obtain a wiring error type;
s5, the field analysis specialized system receives the phasor diagram and the wiring error type through the central server, and checks the phasor diagram and the wiring error type through regular or irregular wiring;
and S6, feeding back the wiring checking result to the field checking device by the expert through the central server.
9. The method for detecting the wiring of the intelligent detection system for the abnormal wiring before the power transmission of the electric energy metering device according to claim 8, wherein the method comprises the following steps: the specific method for drawing the phasor diagram by the voltage-current phasor diagram module in the step S2 is as follows: the phase relation of each phase voltage quantity and the phase relation of each phase current quantity are respectively displayed and a phasor graph is drawn according to the phase angle between the measured voltage and the measured current by taking the A-phase voltage as the reference.
10. The method for detecting the wiring of the intelligent detection system for the abnormal wiring before the power transmission of the electric energy metering device according to claim 8, wherein the method comprises the following steps: the step S4 of analyzing the wrong wiring type by the wrong wiring analysis module to obtain the wiring error type specifically includes the following steps: establishing a corresponding table of judgment scores and wiring error types, extracting relevant characteristic phasors from an error wiring classification model based on voltage and current information, performing characteristic matching of voltage, current and power factor angles by combining a phasor diagram and the error wiring classification model, performing fuzzy operation, and finally obtaining judgment scores and comparing the corresponding table to obtain the wiring error types.
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| CN202210641248.0A CN114966475A (en) | 2022-06-07 | 2022-06-07 | Intelligent detection system and method for abnormal wiring before power transmission of electric energy metering device |
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| CN202210641248.0A CN114966475A (en) | 2022-06-07 | 2022-06-07 | Intelligent detection system and method for abnormal wiring before power transmission of electric energy metering device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116699235A (en) * | 2023-08-08 | 2023-09-05 | 安徽融兆智能有限公司 | Three-phase three-wire electric energy meter with abnormality detection function |
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2022
- 2022-06-07 CN CN202210641248.0A patent/CN114966475A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116699235A (en) * | 2023-08-08 | 2023-09-05 | 安徽融兆智能有限公司 | Three-phase three-wire electric energy meter with abnormality detection function |
| CN116699235B (en) * | 2023-08-08 | 2023-11-07 | 安徽融兆智能有限公司 | Three-phase three-wire electric energy meter with abnormality detection function |
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