CN112285630A - Mutual inductor detection method and system - Google Patents
Mutual inductor detection method and system Download PDFInfo
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- CN112285630A CN112285630A CN202010966551.9A CN202010966551A CN112285630A CN 112285630 A CN112285630 A CN 112285630A CN 202010966551 A CN202010966551 A CN 202010966551A CN 112285630 A CN112285630 A CN 112285630A
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- mutual inductor
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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
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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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
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
- G01R35/007—Standards or reference devices, e.g. voltage or resistance standards, "golden references"
Abstract
The invention discloses a mutual inductor detection method and a system, wherein the method comprises the following steps: receiving measurement parameters of a mutual inductor to be tested through a mutual inductor tester; testing the mutual inductor to be tested based on the measurement parameters to obtain detection data of the mutual inductor to be tested; and correcting the detection data through the mutual inductor tester according to the test environment of the mutual inductor to be tested, and acquiring a corrected detection data result.
Description
Technical Field
The invention relates to the technical field of electric energy measurement, in particular to a mutual inductor detection method and system.
Background
With the rapid development of the internet, the technology of the internet of things is widely applied to various industries of national economy in China, and forms a large pattern of cooperative work of object-to-object perception, interconnection, intelligence and the like. However, the work task of the transformer error checking still depends on the off-line flow management, or part of the work task can be managed by means of internal telephone, short message and the like, so that the detection work efficiency of the transformer is influenced, and the transformer detection has no uniform standardized management mode. In addition, the existing mutual inductor check meter does not have the data communication capability with a system intranet (such as an MDS system, namely a provincial metering production scheduling platform, and a national network platform integrating the overall process management of planning, verification, storage, distribution and the like), and the detection result data can only be stored and transmitted in a paper file mode. The current situation of transformer error detection work cannot meet the requirements of the construction of a ubiquitous Internet of things system, the research on a field transformer calibration technology and a management technology with automatic data uploading is developed, and a networked and intelligent transformer calibration system is imperatively established.
Disclosure of Invention
The technical scheme of the invention provides a method and a system for detecting a mutual inductor, which aim to solve the problem of how to accurately detect the mutual inductor based on error correction.
In order to solve the above problem, the present invention provides a method for detecting a transformer, including:
receiving measurement parameters of a mutual inductor to be tested through a mutual inductor tester;
testing the mutual inductor to be tested based on the measurement parameters to obtain detection data of the mutual inductor to be tested;
and correcting the detection data through the mutual inductor tester according to the test environment of the mutual inductor to be tested, and acquiring a corrected detection data result.
Preferably, before receiving the measurement parameters of the transformer to be tested by the transformer tester, the method comprises the following steps:
the mobile operation terminal and the mutual inductor tester carry out key agreement;
sending the encrypted measurement parameters to the mutual inductor tester through the mobile operation terminal;
and the mutual inductor tester analyzes the received encrypted measurement parameters to obtain the analyzed measurement parameters.
Preferably, the correcting the detection data according to the test environment of the transformer to be tested includes:
correcting standard errors, namely correcting errors of the detection data according to a preset rule;
temperature correction, namely calculating temperature correction of the detection data according to the parameters of the tested mutual inductor and the environmental temperature recorded by the mutual inductor tester, and correcting the detection data based on the temperature correction;
frequency correction, namely calculating frequency correction of the detection data according to the parameters of the tested mutual inductor and the power supply frequency recorded by the mutual inductor tester, and correcting the detection data based on the frequency correction;
and load/pressure drop correction, namely measuring the pressure drop of a secondary circuit during the operation of the tested transformer and the secondary load during the operation, calculating the load/pressure drop correction of the detection data according to the pressure drop of the secondary circuit during the operation and the secondary load during the operation, and correcting the detection data based on the load/pressure drop correction.
Preferably, after the detecting data is corrected according to the testing environment of the transformer to be tested and the corrected detecting data result is obtained, the method further includes:
and encrypting the detection data result through the mobile operation terminal, and sending the encrypted detection data result to the management platform.
Preferably, the detecting data result is encrypted by the mobile operation terminal, and the encryption mode includes: identity authentication, electronic signatures, or data encryption.
Based on another aspect of the present invention, the present invention provides a transformer detection system, including: a mutual inductor to be tested and a mutual inductor tester;
the mutual inductor tester is used for receiving the measurement parameters of the mutual inductor to be tested;
testing the mutual inductor to be tested by the mutual inductor tester based on the measurement parameters to obtain the detection data of the mutual inductor to be tested;
and correcting the detection data through the mutual inductor tester according to the test environment of the mutual inductor to be tested, and acquiring a corrected detection data result.
Preferably, the system further comprises a mobile job terminal for:
carrying out key agreement with the mutual inductor tester through the mobile operation terminal;
sending the encrypted measurement parameters to the mutual inductor tester through the mobile operation terminal;
and analyzing the received encrypted measurement parameters through the mutual inductor tester to obtain the analyzed measurement parameters.
Preferably, the modifying, by the transformer tester, the detection data according to the test environment of the transformer to be tested includes:
the standard error correction unit is used for correcting errors of the detection data according to a preset rule;
the temperature correction unit is used for calculating the temperature correction quantity of the detection data according to the parameters of the tested mutual inductor and the environmental temperature recorded by the mutual inductor tester, and correcting the detection data based on the temperature correction quantity;
the frequency correction unit is used for calculating the frequency correction of the detection data according to the parameters of the tested mutual inductor and the power supply frequency recorded by the mutual inductor tester, and correcting the detection data based on the frequency correction;
and the load/voltage drop correction unit is used for measuring the voltage drop of the secondary circuit during the operation of the tested transformer and the secondary load during the operation, calculating the load/voltage drop correction of the detection data according to the voltage drop of the secondary circuit during the operation and the secondary load during the operation, and correcting the detection data based on the load/voltage drop correction.
Preferably, the system further comprises a mobile operation terminal, further configured to:
and encrypting the detection data result through the mobile operation terminal, and sending the encrypted detection data result to the management platform.
Preferably, the detecting data result is encrypted by the mobile operation terminal, and the encryption mode includes: identity authentication, electronic signatures, or data encryption.
The technical scheme of the invention provides an intelligent mutual inductor calibrator with error correction and automatic data uploading functions, namely, a standard error correction operation module, a temperature correction module, a load/voltage drop correction module, a frequency correction module, a communication module and an information input function are added on the basis of original error model calculation. According to the technical scheme, the detection data can be corrected according to the test environment, and accurate detection of the mutual inductor is realized.
Drawings
A more complete understanding of exemplary embodiments of the present invention may be had by reference to the following drawings in which:
FIG. 1 is a flow chart of a method for detecting a transformer in accordance with a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram of an intelligent transformer calibrator in-situ work flow according to a preferred embodiment of the present invention; and
fig. 3 is a block diagram of a transformer sensing system according to a preferred embodiment of the present invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Fig. 1 is a flowchart of a transformer detection method according to a preferred embodiment of the present invention. The invention provides a method for an intelligent mutual inductor calibrator with error correction and automatic uploading functions of detection data.
As shown in fig. 1, the present invention provides a method for detecting a transformer, including:
preferably, in step 101: and receiving the measurement parameters of the mutual inductor to be tested through the mutual inductor tester. Preferably, before receiving the measurement parameters of the transformer to be tested by the transformer tester, the method comprises the following steps:
the mobile operation terminal and the mutual inductor tester carry out key agreement;
sending the encrypted measurement parameters to a mutual inductor tester through the mobile operation terminal;
and the mutual inductor tester analyzes the received encrypted measurement parameters to obtain the analyzed measurement parameters.
Preferably, at step 102: and testing the mutual inductor to be tested based on the measurement parameters to obtain the detection data of the mutual inductor to be tested.
Preferably, in step 103: and correcting the detection data through the mutual inductor tester according to the test environment of the mutual inductor to be tested, and acquiring the corrected detection data result.
Preferably, the correcting the detection data according to the test environment of the transformer to be tested includes:
correcting standard errors, namely correcting errors of the detection data according to a preset rule;
temperature correction, namely calculating the correction of the detection data according to the parameters of the detected mutual inductor and the environmental temperature recorded by the mutual inductor tester;
frequency correction, namely calculating the correction of the detection data according to the parameters of the detected mutual inductor and the power supply frequency recorded by the mutual inductor tester;
and load/voltage drop correction, namely measuring the voltage drop of the secondary circuit during the operation of the tested transformer and the secondary load during the operation, and calculating the correction of the detection data according to the voltage drop of the secondary circuit during the operation and the secondary load during the operation.
The invention respectively provides a correction operation module, a temperature correction module, a load/pressure drop correction module, a frequency correction module, a communication module and an information input function as follows:
(1) correcting the standard instrument, namely correcting the standard instrument by a method of a regulation JJG 313 current transformer for measurement and a regulation JJG 314 voltage transformer for measurement when the used standard instrument is higher than the detected transformer by an accurate level;
(2) temperature and frequency correction mainly aims at a CVT part, and correction quantity is calculated through an internal formula according to parameters of the CVT to be detected and the environment temperature and the power frequency recorded by a transformer calibrator;
(3) when load/voltage drop is corrected, the voltage drop of an actual secondary circuit of the mutual inductor and an actual secondary load need to be measured, and after the actual load is input, the module can calculate according to an internal formula to obtain the correction quantity.
And all the correction amounts are superposed on the actual visual value error of the mutual inductor calibrator, and then the field error detection data of the mutual inductor is obtained.
(4) In the aspect of data communication, a mobile operation terminal is used as a transmission medium, the data acquisition of the transformer calibrator is carried out in the modes of identity authentication, electronic signature and data encryption, and the communication with a transformer management module in an intranet system is realized through a Bluetooth mode and the micro-application of a transformer of the mobile operation terminal.
Preferably, after the detection data is corrected according to the test environment of the transformer to be tested and the corrected detection data result is obtained, the method further includes:
and encrypting the detection data result through the mobile operation terminal, and sending the encrypted detection data result to the management platform.
Preferably, the mobile operation terminal encrypts the detection data result, and the encryption mode includes: identity authentication, electronic signatures, or data encryption.
The invention provides a technical method of an intelligent mutual inductor calibrator, which can correct detection data of a mutual inductor according to a test environment, and upload measurement parameters and data results of the mutual inductor to an intranet system through a mobile operation terminal.
The invention provides a technical method of an intelligent mutual inductor calibrator with error correction and automatic data uploading functions aiming at the problems of the mutual inductor calibrator at the present stage, namely, a standard error correction operation module, a temperature correction module, a load/pressure drop correction module, a frequency correction module, a communication module and an information input function are added on the basis of the original error model calculation. According to the technology, detection data can be corrected according to a test environment, the measurement parameters and data results of the mutual inductor calibrator are uploaded to an intranet system through a closed-loop management system by means of a mobile operation terminal, a communication part adopts a safety chip encryption module to walk through the closed-loop management system, pushing of extranet data to an intranet is safely achieved, the current situation that the management and control risk of the data capacity of the mutual inductor calibrator is high is solved, and technical support is provided for achieving mutual inductor service Internet of things.
Fig. 2 is a flow chart of the field work of the intelligent transformer calibrator designed according to the present invention, wherein an MDS system can initiate a task work order, an SG186 system can provide ledger information of a tested transformer, and an SG-MDS is a national grid metering production scheduling platform and can be shown as a result.
(1) Firstly, an MDS system initiates a transformer field check work order, the work order is distributed to a mobile operation terminal, and field operation personnel develop transformer detection work according to information in the work order. After the detection work is finished, field operating personnel submit the detection data to the MDS system through the mobile operation terminal to form closed-loop management;
(2) before the mutual inductor detection is carried out, firstly, Bluetooth is turned on, the Bluetooth is paired with a mobile operation terminal, and after the connection is confirmed to be established, parameters are issued to a mutual inductor detection data acquisition and transmission device through the mobile operation terminal for detection;
(3) the encryption and decryption of data are realized between the mobile operation terminal and the mutual inductor calibrator through the safety unit and the safety chip, and the safety and high efficiency of the data transmission process are ensured. Before data interaction, key agreement and key downloading are carried out between the mobile operation terminal and the intelligent transformer calibrator; when the instruction is issued, the mobile operation terminal encrypts the message through the safety unit and then sends the message to the check meter; a safety chip arranged in the calibrator analyzes the message and executes a corresponding instruction; when data are uploaded, the data are converted into ciphertext through the security chip and sent to the mobile operation terminal, the mobile operation terminal analyzes the data through the security unit, then an intranet front volume service program is displayed or called on the mobile operation terminal, the data are uploaded to an upper-layer service application system, and finally automatic collection and recording and paperless operation of mutual inductor detection data are achieved.
Fig. 3 is a block diagram of a transformer sensing system according to a preferred embodiment of the present invention. As shown in fig. 3, the present invention provides a transformer detection system, which includes: a mutual inductor to be tested and a mutual inductor tester;
the transformer tester is used for receiving the measurement parameters of the transformer to be tested. Preferably, the system further comprises a mobile job terminal for:
carrying out key agreement with a mutual inductor tester through the mobile operation terminal;
sending the encrypted measurement parameters to a mutual inductor tester through the mobile operation terminal;
and analyzing the received encrypted measurement parameters through a mutual inductor tester to obtain the analyzed measurement parameters.
Testing the mutual inductor to be tested based on the measurement parameters through a mutual inductor tester to obtain the detection data of the mutual inductor to be tested;
and correcting the detection data through the mutual inductor tester according to the test environment of the mutual inductor to be tested, and acquiring the corrected detection data result.
Preferably, the modifying the detection data by the instrument transformer tester according to the test environment of the instrument transformer to be tested includes:
the standard error correction unit is used for correcting errors of the detection data according to a preset rule;
the temperature correction unit is used for calculating the temperature correction quantity of the detection data according to the parameters of the tested mutual inductor and the environmental temperature recorded by the mutual inductor tester, and correcting the detection data based on the temperature correction quantity;
the frequency correction unit is used for calculating the frequency correction of the detection data according to the parameters of the tested mutual inductor and the power supply frequency recorded by the mutual inductor tester, and correcting the detection data based on the frequency correction;
and the load/voltage drop correction unit is used for measuring the voltage drop of the secondary circuit during the operation of the tested transformer and the secondary load during the operation, calculating the load/voltage drop correction of the detection data according to the voltage drop of the secondary circuit during the operation and the secondary load during the operation, and correcting the detection data based on the load/voltage drop correction.
Preferably, the system further comprises a mobile job terminal, further configured to:
and encrypting the detection data result through the mobile operation terminal, and sending the encrypted detection data result to the management platform.
Preferably, the mobile operation terminal encrypts the detection data result, and the encryption mode includes: identity authentication, electronic signatures, or data encryption.
The transformer calibrator provided by the invention is standard calibration equipment and is responsible for carrying out on-site calibration on the power transformer, and the calibration result is uploaded to the mobile operation terminal through the safe wireless transmission device.
The invention realizes the real-time interaction of the standardized management and the checking process of the field operation process through the mobile operation terminal, receives the checking result uploaded by the field checking instrument, and uploads the result to the MDS system through the acquisition operation and maintenance closed-loop data channel. In order to facilitate the development of on-site verification work, the mobile operation terminal can acquire verification task data and equipment basic archive information from an MDS (system development subsystem) in real time, and can also initiate a verification task and newly build or supplement plant stations and test article information.
The invention collects the operation and maintenance closed loop to provide a data interaction channel, and uploads and issues a verification task, the test article file information and the verification result information.
The MDS system is responsible for overall management of field verification work of the power transformer, makes a verification plan, issues verification tasks, receives verification results and provides basic information of verification equipment, a standard device and a test sample file for the field verification work.
(5) Basic sample file information is provided by the SG186 system through a data synchronization mechanism with the MDS system.
(6) And each MDS system uploads the verification result data to a national network metering production scheduling platform (SG-MDS).
The invention provides an intelligent mutual inductor detection system, which is characterized in that mutual inductor detection data can be automatically uploaded to an intranet system through a mobile operation terminal after error correction and safety encryption, and the mutual inductor detection data is not used for realizing automatic communication from a detection site to a national network system;
the invention provides a push path for detecting data from an external network to an internal network, namely, the detection data of a check meter is converted into a ciphertext through a security chip and sent to a mobile operation terminal, the mobile operation terminal analyzes the data through a security unit and then displays the data on the mobile operation terminal or uploads the data to an upper-layer service application system, and finally, the automatic collection and recording and paperless operation of the mutual inductor detection data are realized.
The invention has been described with reference to a few embodiments. However, other embodiments of the invention than the one disclosed above are equally possible within the scope of the invention, as would be apparent to a person skilled in the art from the appended patent claims.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the [ device, component, etc ]" are to be interpreted openly as referring to at least one instance of said device, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
Claims (10)
1. A method of transformer detection, the method comprising:
receiving measurement parameters of a mutual inductor to be tested through a mutual inductor tester;
testing the mutual inductor to be tested based on the measurement parameters to obtain detection data of the mutual inductor to be tested;
and correcting the detection data through the mutual inductor tester according to the test environment of the mutual inductor to be tested, and acquiring a corrected detection data result.
2. The method of claim 1, wherein the receiving, by the instrument transformer tester, the measurement parameters of the instrument transformer to be tested comprises:
the mobile operation terminal and the mutual inductor tester carry out key agreement;
sending the encrypted measurement parameters to the mutual inductor tester through the mobile operation terminal;
and the mutual inductor tester analyzes the received encrypted measurement parameters to obtain the analyzed measurement parameters.
3. The method of claim 1, wherein the modifying the detection data according to the testing environment of the transformer to be tested comprises:
correcting standard errors, namely correcting errors of the detection data according to a preset rule;
temperature correction, namely calculating temperature correction of the detection data according to the parameters of the tested mutual inductor and the environmental temperature recorded by the mutual inductor tester, and correcting the detection data based on the temperature correction;
frequency correction, namely calculating frequency correction of the detection data according to the parameters of the tested mutual inductor and the power supply frequency recorded by the mutual inductor tester, and correcting the detection data based on the frequency correction;
and load/pressure drop correction, namely measuring the pressure drop of a secondary circuit during the operation of the tested transformer and the secondary load during the operation, calculating the load/pressure drop correction of the detection data according to the pressure drop of the secondary circuit during the operation and the secondary load during the operation, and correcting the detection data based on the load/pressure drop correction.
4. The method of claim 1, wherein after the modifying the detection data according to the testing environment of the transformer to be tested and obtaining the modified detection data result, the method further comprises:
and encrypting the detection data result through the mobile operation terminal, and sending the encrypted detection data result to the management platform.
5. The method of claim 4, wherein the mobile operation terminal encrypts the detection data result in an encryption manner comprising: identity authentication, electronic signatures, or data encryption.
6. A transformer detection system, the system comprising: a mutual inductor to be tested and a mutual inductor tester;
the mutual inductor tester is used for receiving the measurement parameters of the mutual inductor to be tested;
testing the mutual inductor to be tested by the mutual inductor tester based on the measurement parameters to obtain the detection data of the mutual inductor to be tested;
and correcting the detection data through the mutual inductor tester according to the test environment of the mutual inductor to be tested, and acquiring a corrected detection data result.
7. The system of claim 6, further comprising a mobile job terminal for:
carrying out key agreement with the mutual inductor tester through the mobile operation terminal;
sending the encrypted measurement parameters to the mutual inductor tester through the mobile operation terminal;
and analyzing the received encrypted measurement parameters through the mutual inductor tester to obtain the analyzed measurement parameters.
8. The system of claim 6, wherein the modifying, by the transformer tester, the detection data according to the testing environment of the transformer to be tested comprises:
the standard error correction unit is used for correcting errors of the detection data according to a preset rule;
the temperature correction unit is used for calculating the temperature correction quantity of the detection data according to the parameters of the tested mutual inductor and the environmental temperature recorded by the mutual inductor tester, and correcting the detection data based on the temperature correction quantity;
the frequency correction unit is used for calculating the frequency correction of the detection data according to the parameters of the tested mutual inductor and the power supply frequency recorded by the mutual inductor tester, and correcting the detection data based on the frequency correction;
and the load/voltage drop correction unit is used for measuring the voltage drop of the secondary circuit during the operation of the tested transformer and the secondary load during the operation, calculating the load/voltage drop correction of the detection data according to the voltage drop of the secondary circuit during the operation and the secondary load during the operation, and correcting the detection data based on the load/voltage drop correction.
9. The system of claim 6, further comprising a mobile job terminal, further configured to:
and encrypting the detection data result through the mobile operation terminal, and sending the encrypted detection data result to the management platform.
10. The system of claim 9, wherein the mobile operation terminal encrypts the detection data result in an encryption manner comprising: identity authentication, electronic signatures, or data encryption.
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| CN202010966551.9A CN112285630A (en) | 2020-09-15 | 2020-09-15 | Mutual inductor detection method and system |
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| CN202010966551.9A CN112285630A (en) | 2020-09-15 | 2020-09-15 | Mutual inductor detection method and system |
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