CN110958071A - Electronic transformer clock error self-calibration system and method based on 4G module - Google Patents
Electronic transformer clock error self-calibration system and method based on 4G module Download PDFInfo
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- CN110958071A CN110958071A CN201911044304.7A CN201911044304A CN110958071A CN 110958071 A CN110958071 A CN 110958071A CN 201911044304 A CN201911044304 A CN 201911044304A CN 110958071 A CN110958071 A CN 110958071A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0644—External master-clock
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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
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/03—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/12—Applying verification of the received information
- H04L63/123—Applying verification of the received information received data contents, e.g. message integrity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
- H04L9/3247—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving digital signatures
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/10—Integrity
- H04W12/106—Packet or message integrity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
Abstract
The invention discloses a 4G module-based electronic transformer clock error self-calibration system and a method, wherein the system comprises the following steps: sending an initial synchronization pulse to the tested mutual inductor module and the standard mutual inductor module by using the Beidou synchronization module; the method comprises the steps that a tested mutual inductor module obtains first clock message data; the standard mutual inductor module acquires second clock message data; the communication module sends the first clock message data and the second message data to a clock error calibration module; and the clock error calibration module is used for calculating the clock error of the tested mutual inductor according to the first clock message data and the second clock message data and sending the clock error to the tested mutual inductor module for self calibration. The error self-calibration method does not need manual inspection, so that the equipment detection and calibration work is easy, the calibration cost of the electronic transformer is reduced, the working efficiency is improved, the error self-calibration method can be completed without going out, and meanwhile, the requirement of remote magnitude traceability of the clock error of the electronic transformer is met.
Description
Technical Field
The invention relates to the technical field of electronic transformer calibration, in particular to a system and a method for electronic transformer clock error self-calibration based on a 4G module.
Background
With the advance of the construction of a digital metering system, higher requirements are put forward on technical indexes of secondary equipment, calibration and detection of an electronic transformer are particularly important for obtaining high-precision equipment sampling data, a clock error is an important parameter of the measurement precision of a merging unit of the electronic transformer, the concrete index requirements of the clock error under the working condition of the merging unit (merging unit) are indicated according to the Q/GDW 11015 and 2013 analog input type merging unit detection standard of the enterprise standard of the national power grid company, but for the merging unit, a clock error remote traceability system is not established domestically, a periodic inspection mode is generally adopted for the clock error calibration of the electronic transformer and the merging unit in a transformer substation, and the clock error traceability problem is a great problem which puzzles the field of the remote calibration of the electronic transformer.
In the daily detection calibration business, the electronic transformer needs to be calibrated regularly, and for the situation, a professional is required to disassemble equipment and then send for inspection at present, and the mode has the following defects: 1. the workload of disassembling and installing equipment is heavy, and the risk of equipment damage exists; 2. the manual inspection period is too long, and the electronic transformer with possible errors cannot be found in time, so that economic loss is caused; 3. more manpower and material resources are needed.
Disclosure of Invention
The invention provides a 4G module-based electronic transformer clock error self-calibration system and a 4G module-based electronic transformer clock error self-calibration method, which are used for solving the problem of how to remotely calibrate the clock error of an electronic transformer.
In order to solve the above problem, according to an aspect of the present invention, there is provided a 4G module-based electronic transformer clock error self-calibration system, the system including:
the Beidou synchronization module is respectively connected with the measured mutual inductor module and the standard mutual inductor module and is used for sending initial synchronization pulses to the measured mutual inductor module and the standard mutual inductor module so as to ensure that the sampling time of the measured mutual inductor is synchronous with that of the standard mutual inductor;
the mutual-inductor module under test is connected with communication module, includes: the system comprises a tested mutual inductor and a first upper computer analysis unit, wherein the first upper computer analysis unit is used for analyzing first voltage and current message data detected by the tested mutual inductor to obtain first clock message data;
the standard mutual-inductor module is connected with communication module, includes: the standard mutual inductor and the second upper computer analysis unit are used for analyzing second voltage and current message data detected by the standard mutual inductor by utilizing the second upper computer analysis unit so as to obtain second clock message data;
the communication module is connected with the clock error calibration module and used for sending the first clock message data and the second message data to the clock error calibration module;
and the clock error calibration module is used for calculating the clock error of the tested mutual inductor according to the first clock message data and the second clock message data and sending the clock error to the tested mutual inductor module for self calibration.
Preferably, wherein the system further comprises:
the setting module is used for setting test parameters, and the test parameters comprise: the test device comprises a test set value, test duration, test frequency, a Beidou synchronization module and a communication module.
Preferably, wherein the communication module comprises: the 4G communication module that is located the mutual-inductor module side of being surveyed and the 4G communication module that is located standard mutual-inductor module side, every 4G communication module is independent hardware device, includes: the system comprises a shell, a mode selection circuit, an SIM interface circuit, a communication function circuit and a server-side forwarding program, wherein the shell, the mode selection circuit, the SIM interface circuit, the communication function circuit and the server-side forwarding program are used for sending data to a far end through a cloud end; and under the condition that the 4G network communication is abnormal, storing the calibration data locally, and reconnecting and sending the calibration data after the 4G communication data is normal next time.
Preferably, wherein the system further comprises:
and the integrity checking module is used for ensuring the integrity of data in the communication process by adopting a data check code technology, carrying out data signature authentication on the transmitted data before the 4G network transmission process of the data, ensuring the integrity of the transmitted data, adding an integrity check value after the message data, and carrying out data integrity verification according to the data check code after the self-clock error calibration module receives the data.
According to another aspect of the invention, a 4G module-based electronic transformer clock error self-calibration method is provided, and the method comprises the following steps:
the Beidou synchronization module sends an initial synchronization pulse to the tested mutual inductor module and the standard mutual inductor module to ensure that the sampling time of the tested mutual inductor and the sampling time of the standard mutual inductor are synchronous;
the tested mutual inductor module analyzes first voltage and current message data detected by the tested mutual inductor by using a first upper computer analysis unit so as to obtain first clock message data;
the standard transformer module is used for analyzing second voltage and current message data detected by the standard transformer by using a second upper computer analysis unit so as to obtain second clock message data;
the communication module sends the first clock message data and the second message data to a clock error calibration module;
and the clock error calibration module calculates the clock error of the tested mutual inductor according to the first clock message data and the second clock message data, and sends the clock error to the tested mutual inductor module for self calibration.
Preferably, wherein the method further comprises:
setting test parameters, wherein the test parameters comprise: the test device comprises a test set value, test duration, test frequency, a Beidou synchronization module and a communication module.
Preferably, wherein the communication module comprises: the 4G communication module that is located the mutual-inductor module side of being surveyed and the 4G communication module that is located standard mutual-inductor module side, every 4G communication module is independent hardware device, includes: the system comprises a shell, a mode selection circuit, an SIM interface circuit, a communication function circuit and a server-side forwarding program, wherein the shell, the mode selection circuit, the SIM interface circuit, the communication function circuit and the server-side forwarding program are used for sending data to a far end through a cloud end; and under the condition that the 4G network communication is abnormal, storing the calibration data locally, and reconnecting and sending the calibration data after the 4G communication data is normal next time.
Preferably, wherein the method further comprises:
the integrity of data in the communication process is guaranteed by adopting a data check code technology, before the data is transmitted in a 4G network, data signature authentication is carried out on the transmitted data to guarantee the integrity of the transmitted data, an integrity check value is added after the message data, and after the data is received from a clock error calibration module, data integrity verification is carried out according to the data check code.
The invention provides a 4G module-based electronic transformer clock error self-calibration system and a method, which comprises the following steps: sending an initial synchronization pulse to the tested mutual inductor module and the standard mutual inductor module by using the Beidou synchronization module; the method comprises the steps that a tested mutual inductor module obtains first clock message data; the standard mutual inductor module acquires second clock message data; the communication module sends the first clock message data and the second message data to a clock error calibration module; and the clock error calibration module is used for calculating the clock error of the tested mutual inductor according to the first clock message data and the second clock message data and sending the clock error to the tested mutual inductor module for self calibration. The error self-calibration method of the invention does not need manual inspection, so that the equipment detection and calibration work is easy, the calibration cost of the electronic transformer is reduced, the working efficiency is improved, the work which needs a large amount of business trips can be finished without going out of the house, and meanwhile, the requirement of remote magnitude traceability of the clock error of the electronic transformer is also solved.
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 schematic structural diagram of a 4G module-based electronic transformer clock error self-calibration system 100 according to an embodiment of the present invention;
FIG. 2 is a diagram illustrating an example of a 4G module-based electronic transformer clock error self-calibration system according to an embodiment of the invention;
FIG. 3 is a flow chart of the self-calibration of the clock error of the electronic transformer based on the 4G module according to the embodiment of the invention; and
fig. 4 is a flowchart of a method 400 for self-calibrating a clock error of an electronic transformer based on a 4G module according to an 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 schematic structural diagram of a 4G module-based electronic transformer clock error self-calibration system 100 according to an embodiment of the present invention. As shown in fig. 1, the error self-calibration method adopted by the electronic transformer clock error self-calibration system based on the 4G module provided by the embodiment of the invention does not need manual inspection, so that the equipment detection and calibration work is easy, the calibration cost of the electronic transformer is reduced, the working efficiency is improved, a large amount of work required before business trip can be completed without going to home, and meanwhile, the requirement of remote magnitude traceability of the clock error of the electronic transformer is also met. The electronic transformer clock error self-calibration system 100 based on the 4G module provided by the embodiment of the invention comprises: the system comprises a Beidou synchronization module 101, a tested transformer module 102, a standard transformer module 103, a communication module 104 and a clock error calibration module 105.
Preferably, the Beidou synchronization module 101 is respectively connected with the measured transformer module and the standard transformer module, and is used for sending a starting synchronization pulse to the measured transformer module and the standard transformer module to ensure that the sampling time of the measured transformer and the sampling time of the standard transformer are synchronized.
Preferably, wherein the system further comprises:
the setting module is used for setting test parameters, and the test parameters comprise: the test device comprises a test set value, test duration, test frequency, a Beidou synchronization module and a communication module.
In the embodiment of the invention, the parameters of the clock error self-calibration system are set and displayed, the parameters comprise a test set value, test duration, test frequency and the like, and the parameters can be set for the Beidou synchronization module and the 4G communication module through the serial port.
In the implementation mode of the invention, in the remote calibration of the electronic transformer, the national safety of the design of an electric power system is considered, the Beidou system is adopted to provide synchronous sampling signals for the standard instrument and the measured instrument transformer, based on the Beidou time service technology, the initial synchronous pulse for sending messages is generated according to the standard pulse signals and the local clock signals calibrated by the clock calibration module by utilizing the automatic correction characteristic of the Beidou system clock, the signal synchronization between the measured instrument transformer and the standard instrument is ensured, and the reliability of the synchronous signals is provided for the Beidou system.
Preferably, the measured transformer module 102, connected to the communication module, includes: the first upper computer analysis unit is used for analyzing the first voltage and current message data detected by the tested mutual inductor to obtain first clock message data.
Preferably, the standard transformer module 103, connected with the communication module, includes: and the standard transformer and the second upper computer analysis unit are used for analyzing the second voltage and current message data detected by the standard transformer by using the second upper computer analysis unit so as to acquire second clock message data.
Preferably, the communication module 104 is connected to the clock error calibration module, and configured to send the first clock packet data and the second packet data to the clock error calibration module.
Preferably, wherein the communication module comprises: the 4G communication module that is located the mutual-inductor module side of being surveyed and the 4G communication module that is located standard mutual-inductor module side, every 4G communication module is independent hardware device, includes: the system comprises a shell, a mode selection circuit, an SIM interface circuit, a communication function circuit and a server-side forwarding program, wherein the shell, the mode selection circuit, the SIM interface circuit, the communication function circuit and the server-side forwarding program are used for sending data to a far end through a cloud end; and under the condition that the 4G network communication is abnormal, storing the calibration data locally, and reconnecting and sending the calibration data after the 4G communication data is normal next time.
Preferably, wherein the system further comprises:
and the integrity checking module is used for ensuring the integrity of data in the communication process by adopting a data check code technology, carrying out data signature authentication on the transmitted data before the 4G network transmission process of the data, ensuring the integrity of the transmitted data, adding an integrity check value after the message data, and carrying out data integrity verification according to the data check code after the self-clock error calibration module receives the data.
In the embodiment of the invention, the 4G communication module is an independent hardware device and comprises an SIM card interface circuit and a communication circuit, an indicator lamp is provided for indicating the current working state of the circuit, a power supply voltage stabilizing circuit is provided for supplying power to the 4G communication module, software is used for supplying power to the 4G communication module, and a mode selection circuit and an SIM interface which are connected with the 4G communication module, the 4G communication module sends the data to a remote end through a transfer service, and the module sets requirements according to the parameters, preliminarily analyzing and screening a large amount of data messages, completing the function of engine data circulation according to a set rule protocol, forwarding the message data to a server data queue, the server transfer program subscribes message data from the data queue, high-performance closed-loop transmission of the message data between the equipment device and the forwarding service is realized, and finally, the forwarding of the data message is realized according to a general network protocol.
In data communication, a network communication link is encrypted, data is encrypted through link nodes, encryption keys are different on each encryption node, so that the data is decrypted and then encrypted when passing through the link, the data exists in a ciphertext mode in the whole transmission process, link encryption is carried out on communication message data through combination of software and hardware in the communication link encryption, the communication message data is converted into meaningless ciphertext information through encryption key or encryption function operation, and after network transmission, a receiver converts the ciphertext information into plaintext data through a decryption function, so that safety guarantee is provided for the data transmitted on the network.
Preferably, the clock error calibration module 105 is configured to calculate a clock error of the measured transformer according to the first clock packet data and the second clock packet data, and send the clock error to the measured transformer module for self calibration.
Fig. 2 is a diagram illustrating an example of a 4G module-based electronic transformer clock error self-calibration system according to an embodiment of the invention. As shown in fig. 2, the system is divided into two parts, namely an on-site secondary side device and a detection traceability room, wherein the two parts are used for carrying out data communication through a 4G communication module and carrying out signal synchronization by utilizing a Beidou synchronization module. In the embodiment of the invention, a user operates the upper computer software to realize the function of issuing the parameters of the clock error device through the equipment serial port, and the issued parameters comprise the testing duration, the set value of the time setting error, the minimum value of the time setting error, the maximum value of the time setting error, the Beidou synchronous module parameters and the 4G communication module parameters.
In order to ensure the calibration accuracy, clock synchronization is a necessary condition, the device must ensure the signal synchronization of the tested mutual inductor and the standard mutual inductor, in the process of wired calibration, because the wired calibration standard device and the tested mutual inductor provide synchronous signals by the same synchronous clock, the device can be considered that the clock synchronization between the standard device and the mutual inductor is kept, but in the process of wireless calibration, two ends of the tested mutual inductor and the standard mutual inductor cannot adopt different clocks to provide clock signals, so that the signal synchronization of the two clock devices must be ensured, the Beidou time service is considered to be mature day by day, and the power grid system relates to national security, and the Beidou system clock synchronization is selected.
Based on the high accuracy of the Beidou system clock, all Beidou satellites and the ground measurement and control station form a closed-loop automatic correction system, and the Beidou can be considered to be stable for a long time, and the steps of realizing clock synchronization by using the Beidou time service technology are as follows: the first step is as follows: initializing a Beidou module and connecting Beidou upper computer software; the second step is that: the upper computer software judges the number of the connected satellites of the Beidou module, and ensures that the module outputs synchronous time-giving second pulse signals according to the number of the satellites; the third step: whether the number of connected satellites meets the requirement or not, if so, providing a synchronous signal for the standard device and the tested object; the fourth step: and carrying out synchronous time service and starting and stopping clock signal output according to requirements.
In the embodiment of the invention, the transmission data is encrypted. Specifically, the 4G communication module program encrypts data by using a symmetric encryption DES algorithm, and restricts access rights of other programs to network transmission data, the DES encryption algorithm is one of the most popular encryption algorithms at present, and uses the same key to encrypt and decrypt data, and the implementation flow of the encryption algorithm is as follows: the first step is as follows: input information needs to be padded, each time a fixed-length data segment is processed, the size of a DES packet is 64 bits, and if the encrypted data length is not a multiple of 64 bits, the bits are padded according to a specific rule. And secondly, carrying out encryption processing by arranging and replacing the plaintext, obtaining a function of 16 subkeys from a given initial password in the process, and carrying out bit operation processing on each subkey according to a set sequence and 16-time bit operation in one round. And thirdly, calculating 16 sub-keys, analyzing and calculating the data after initializing variables, copying each link variable into the other four variables according to groups, calculating through 4 rounds of main cycle, and sequentially operating and processing the data according to a nonlinear function to obtain 16 sub-keys at one time. And fourthly, acquiring the sub-key through the processes, and then completing the encryption function through initial replacement and extended replacement to acquire ciphertext data.
The 4G communication module is an independent device and comprises a shell, a mode selection circuit, an SIM interface circuit and a communication function module, and the 4G module comprises a server-side forwarding program and is used for sending data to a far end through a cloud end, under the condition that 4G network communication is abnormal, the program can store the calibration data locally, and after the next 4G communication data is normal, the calibration data is reconnected and sent
The clock error calibration module is self-calibration software, a C + + programming language is adopted, MFC framework development is based, a development environment is a window 7 flagship operating system, calibration data are obtained from a 4G module server in real time, the clock self-calibration software carries out unified storage management and tracing on message data, and the software comprises login authority management, parameter configuration, network communication, safety encryption, a clock error calibration function module and a calibration data derivation function.
In addition, the self-calibration software creates a user account, manages all relevant user data in the software, and realizes new creation or deletion of users, user state modification, user information inquiry, permission addition for specified users and the like through the permission management function module. The software provides the authority for special users, meets the management requirements of some special users, provides a function of setting and exporting user data in batches, performs measures of identity identification and authentication on the user identity of a login operation system to finish conversation, limit the number of illegal login times, automatically quit the illegal login and the like by utilizing a platform account uniqueness mechanism in the aspect of account authority authentication, and authenticates the authority of different users to enable the users to have the authority of data query, operation and automatic calibration.
And the integrity of data in the communication process is ensured by adopting a data check code technology. Before the 4G network transmission process of the data, the data signature authentication is carried out on the transmitted data to ensure the integrity of the data, an integrity check value is added after the message data, and the self-calibration software carries out data integrity verification according to a data check code after receiving the data.
The upper computer software of the clock error self-calibration module is deployed at a server end, the upper computer software sends message data to the clock self-calibration software through the 4G network module, and meanwhile the clock self-calibration software has a short-time data storage function. In addition, the clock error self-calibration module can export self-calibration data, and 2 data export formats are provided, including an EXCEL format and a PDF format. The self-calibration software adopts a set network communication protocol to interact with the data of the upper computer software of the clock error device, the upper computer software carries out detection and calibration services according to preset rules and feeds back the detection and calibration results of each device to the server end in real time, and the upper computer software independently carries out the services, so that the system has better expandability and the data safety is improved.
Fig. 3 is a flowchart of self-calibration of clock errors of an electronic transformer based on a 4G module according to an embodiment of the present invention. As shown in fig. 3, in the embodiment of the present invention, first, 4G module parameters are set; then, connecting the software of the 4G module with a remote server; after the connection is successful, initializing Beidou signals, and synchronizing the measurement signals of the tested mutual inductor and the standard mutual inductor according to the connection number of the Beidou satellites; and starting clock calibration parameters under the software of the upper computer of the server side, analyzing according to the acquired first message data corresponding to the tested mutual inductor and the acquired second message data corresponding to the standard mutual inductor, determining a clock error result, and feeding back to calibrate the clock of the tested mutual inductor according to the clock error result. The embodiment of the invention optimizes the detection and calibration business process, shortens the detection period and saves human resources.
Fig. 4 is a flowchart of a method 400 for self-calibrating a clock error of an electronic transformer based on a 4G module according to an embodiment of the present invention. As shown in fig. 4, a clock error self-calibration method 400 for a transformer based on a 4G module provided by the embodiment of the present invention starts from step 401, and in step 401, the beidou synchronization module sends a start synchronization pulse to the measured transformer module and the standard transformer module, so as to ensure that the sampling times of the measured transformer and the standard transformer are synchronized.
Preferably, wherein the method further comprises: setting test parameters, wherein the test parameters comprise: the test device comprises a test set value, test duration, test frequency, a Beidou synchronization module and a communication module.
In step 402, the measured transformer module analyzes the first voltage and current message data detected by the measured transformer by using the first upper computer analysis unit to obtain the first clock message data.
In step 403, the standard transformer module uses a second upper computer analysis unit to analyze the second voltage and current message data detected by the standard transformer to obtain second clock message data.
In step 404, the communication module sends the first clock message data and the second message data to a clock error calibration module.
Preferably, wherein the communication module comprises: the 4G communication module that is located the mutual-inductor module side of being surveyed and the 4G communication module that is located standard mutual-inductor module side, every 4G communication module is independent hardware device, includes: the system comprises a shell, a mode selection circuit, an SIM interface circuit, a communication function circuit and a server-side forwarding program, wherein the shell, the mode selection circuit, the SIM interface circuit, the communication function circuit and the server-side forwarding program are used for sending data to a far end through a cloud end; and under the condition that the 4G network communication is abnormal, storing the calibration data locally, and reconnecting and sending the calibration data after the 4G communication data is normal next time.
In step 405, the clock error calibration module calculates the clock error of the measured transformer according to the first clock message data and the second clock message data, and sends the clock error to the measured transformer module for self calibration.
Preferably, wherein the method further comprises: the integrity of data in the communication process is guaranteed by adopting a data check code technology, before the data is transmitted in a 4G network, data signature authentication is carried out on the transmitted data to guarantee the integrity of the transmitted data, an integrity check value is added after the message data, and after the data is received from a clock error calibration module, data integrity verification is carried out according to the data check code.
The electronic transformer clock error self-calibration method 400 based on the 4G module according to the embodiment of the present invention corresponds to the electronic transformer clock error self-calibration system 100 based on the 4G module according to another embodiment of the present invention, and is not described herein again.
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.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the scope of the invention, which is intended to be covered by the claims.
Claims (8)
1. An electronic transformer clock error self-calibration system based on a 4G module is characterized by comprising:
the Beidou synchronization module is respectively connected with the measured mutual inductor module and the standard mutual inductor module and is used for sending initial synchronization pulses to the measured mutual inductor module and the standard mutual inductor module so as to ensure that the sampling time of the measured mutual inductor is synchronous with that of the standard mutual inductor;
the mutual-inductor module under test is connected with communication module, includes: the system comprises a tested mutual inductor and a first upper computer analysis unit, wherein the first upper computer analysis unit is used for analyzing first voltage and current message data detected by the tested mutual inductor to obtain first clock message data;
the standard mutual-inductor module is connected with communication module, includes: the standard mutual inductor and the second upper computer analysis unit are used for analyzing second voltage and current message data detected by the standard mutual inductor by utilizing the second upper computer analysis unit so as to obtain second clock message data;
the communication module is connected with the clock error calibration module and used for sending the first clock message data and the second message data to the clock error calibration module;
and the clock error calibration module is used for calculating the clock error of the tested mutual inductor according to the first clock message data and the second clock message data and sending the clock error to the tested mutual inductor module for self calibration.
2. The system of claim 1, further comprising:
the setting module is used for setting test parameters, and the test parameters comprise: the test device comprises a test set value, test duration, test frequency, a Beidou synchronization module and a communication module.
3. The system of claim 1, wherein the communication module comprises: the 4G communication module that is located the mutual-inductor module side of being surveyed and the 4G communication module that is located standard mutual-inductor module side, every 4G communication module is independent hardware device, includes: the system comprises a shell, a mode selection circuit, an SIM interface circuit, a communication function circuit and a server-side forwarding program, wherein the shell, the mode selection circuit, the SIM interface circuit, the communication function circuit and the server-side forwarding program are used for sending data to a far end through a cloud end; and under the condition that the 4G network communication is abnormal, storing the calibration data locally, and reconnecting and sending the calibration data after the 4G communication data is normal next time.
4. The system of claim 1, further comprising:
and the integrity checking module is used for ensuring the integrity of data in the communication process by adopting a data check code technology, carrying out data signature authentication on the transmitted data before the 4G network transmission process of the data, ensuring the integrity of the transmitted data, adding an integrity check value after the message data, and carrying out data integrity verification according to the data check code after the self-clock error calibration module receives the data.
5. A clock error self-calibration method of a mutual inductor based on a 4G module is characterized by comprising the following steps:
the Beidou synchronization module sends an initial synchronization pulse to the tested mutual inductor module and the standard mutual inductor module to ensure that the sampling time of the tested mutual inductor and the sampling time of the standard mutual inductor are synchronous;
the tested mutual inductor module analyzes first voltage and current message data detected by the tested mutual inductor by using a first upper computer analysis unit so as to obtain first clock message data;
the standard transformer module is used for analyzing second voltage and current message data detected by the standard transformer by using a second upper computer analysis unit so as to obtain second clock message data;
the communication module sends the first clock message data and the second message data to a clock error calibration module;
and the clock error calibration module calculates the clock error of the tested mutual inductor according to the first clock message data and the second message data.
6. The method of claim 5, further comprising:
setting test parameters, wherein the test parameters comprise: the test device comprises a test set value, test duration, test frequency, a Beidou synchronization module and a communication module.
7. The method of claim 5, wherein the communication module comprises: the 4G communication module that is located the mutual-inductor module side of being surveyed and the 4G communication module that is located standard mutual-inductor module side, every 4G communication module is independent hardware device, includes: the system comprises a shell, a mode selection circuit, an SIM interface circuit, a communication function circuit and a server-side forwarding program, wherein the shell, the mode selection circuit, the SIM interface circuit, the communication function circuit and the server-side forwarding program are used for sending data to a far end through a cloud end; and under the condition that the 4G network communication is abnormal, storing the calibration data locally, and reconnecting and sending the calibration data after the 4G communication data is normal next time.
8. The method of claim 5, further comprising:
the integrity of data in the communication process is guaranteed by adopting a data check code technology, before the data is transmitted in a 4G network, data signature authentication is carried out on the transmitted data to guarantee the integrity of the transmitted data, an integrity check value is added after the message data, and after the data is received from a clock error calibration module, data integrity verification is carried out according to the data check code.
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