Intelligent operation and maintenance method of digital electric energy metering equipment based on intelligent terminal APP

Abstract

The invention discloses an intelligent operation and maintenance method and system for digital electric energy metering equipment based on an intelligent terminal APP. The method comprises the following steps: filing a digital electric energy metering device; acquiring and storing entered archive data of the digital electric energy metering device, report data determined based on operation and maintenance supervision work, task data and equipment operation data; querying the archive data, the report data, the task data and the equipment operation data according to a preset dimension to obtain a query result; and carrying out operation and maintenance on the digital electric energy metering device based on the query result. The method is oriented to the metering professional staff of the power grid company, supports the metering professional staff of the power grid company to quickly operate and maintain the digital electric energy meter, the merging unit, the electronic transformer and other metering devices of the transformer substation, and can provide an efficient operation and maintenance means for the metering staff of the power company.

Description

Technical Field

[0001] This invention relates to the field of operation and maintenance technology of digital power metering devices in substations, and more specifically, to an intelligent operation and maintenance method and system for digital power metering equipment based on a smart terminal APP. Background Technology

[0002] With the advancement of digitalization and intelligentization in the power industry, digital energy metering systems, represented by digital energy meters, merging units, and electronic instrument transformers, have been applied in digital substations.

[0003] However, the merging units in digital metering systems involve multiple disciplines such as protection, measurement and control, and metering. Multiple disciplines simultaneously manage parameters such as APPID, SVID, channel number, and transformation ratio within the merging unit. This leads to maintenance difficulties when parameter settings are changed during actual operation due to information isolation between different disciplines. Therefore, how to provide parameter information quickly, conveniently, and accurately has become a crucial issue that digital metering equipment needs to address.

[0004] Therefore, there is a need for an intelligent operation and maintenance method for digital power metering equipment based on a smart terminal APP. Summary of the Invention

[0005] This invention proposes an intelligent operation and maintenance method and system for digital power metering equipment based on a smart terminal APP, in order to solve the problem of how to efficiently perform intelligent operation and maintenance of power metering equipment in digital substations.

[0006] To address the aforementioned problems, according to one aspect of the present invention, an intelligent operation and maintenance method for digital energy metering equipment based on a smart terminal APP is provided, the method comprising:

[0007] Establish files for digital energy metering devices;

[0008] Acquire and store the archive data of the digital energy metering device, the report data determined based on operation and maintenance supervision, the task data, and the equipment operation data;

[0009] The query results are obtained by querying the archive data, report data, task data, and equipment operation data according to preset dimensions.

[0010] Operation and maintenance of digital power metering devices based on query results.

[0011] Preferably, the digital energy metering device includes: a substation digital energy meter, a merging unit, and an electronic current transformer.

[0012] Preferably, the process of establishing records for digital energy metering devices includes:

[0013] Acquire images of the nameplate and barcode of the target digital energy metering device, perform image recognition, and obtain the device nameplate information and barcode information;

[0014] Asset matching and filing are performed based on the barcode information. If a corresponding digital energy metering device can be matched using the barcode information, the file data of the corresponding digital energy metering device is read. If a corresponding digital energy metering device cannot be matched using the barcode information, a file is created based on the nameplate information and barcode information, and the file creation is approved when the file review is passed.

[0015] Preferably, the query results obtained by querying the archive data, report data, task data, and equipment operation data according to preset dimensions include:

[0016] The parameters of the digital energy metering device are obtained through an Ethernet interface to Bluetooth module / serial interface to Bluetooth module and transmitted to the smart terminal APP via Bluetooth. This enables the smart terminal APP to interact with the parameters in the main station database and return the database parameters to the smart terminal APP. The merging unit and the electronic current transformer correspond to the Ethernet interface to Bluetooth module, and the digital energy meter corresponds to the serial interface to Bluetooth module.

[0017] Preferably, the operation and maintenance of the digital energy metering device based on the query results includes:

[0018] The calibration instrument for the digital energy metering device is connected to the smart terminal APP via an Ethernet-to-Bluetooth module or a USB-to-Bluetooth module. The calibration report is automatically uploaded to the main station database via the smart terminal APP, and the calibration report can be queried based on the smart terminal APP.

[0019] According to another aspect of the present invention, an intelligent operation and maintenance method system for digital power metering equipment based on a smart terminal APP is provided, the system comprising:

[0020] The filing unit is used to file records for digital energy metering devices;

[0021] The data acquisition unit is used to acquire and store the archive data of the digital energy metering device, the report data determined based on the operation and maintenance supervision work, the task data, and the equipment operation data.

[0022] The query unit is used to query the archive data, report data, task data, and equipment operation data according to preset dimensions and obtain query results;

[0023] The calibration unit is used for the operation and maintenance of digital energy metering devices based on query results.

[0024] Preferably, the digital energy metering device includes: a substation digital energy meter, a merging unit, and an electronic current transformer.

[0025] Preferably, the filing unit files the digital energy metering device, including:

[0026] Acquire images of the nameplate and barcode of the target digital energy metering device, perform image recognition, and obtain the device nameplate information and barcode information;

[0027] Asset matching and filing are performed based on the barcode information. If a corresponding digital energy metering device can be matched using the barcode information, the file data of the corresponding digital energy metering device is read. If a corresponding digital energy metering device cannot be matched using the barcode information, a file is created based on the nameplate information and barcode information, and the file creation is approved when the file review is passed.

[0028] Preferably, the query unit queries the archive data, report data, task data, and equipment operation data according to preset dimensions to obtain query results, including:

[0029] The parameters of the digital energy metering device are obtained through an Ethernet interface to Bluetooth module / serial interface to Bluetooth module and transmitted to the smart terminal APP via Bluetooth. This enables the smart terminal APP to interact with the parameters in the main station database and return the database parameters to the smart terminal APP. The merging unit and the electronic current transformer correspond to the Ethernet interface to Bluetooth module, and the digital energy meter corresponds to the serial interface to Bluetooth module.

[0030] Preferably, the calibration unit performs operation and maintenance of the digital energy metering device based on the query results, including:

[0031] The calibration instrument for the digital energy metering device is connected to the smart terminal APP via an Ethernet-to-Bluetooth module or a USB-to-Bluetooth module. The calibration report is automatically uploaded to the main station database via the smart terminal APP, and the calibration report can be queried based on the smart terminal APP.

[0032] This invention provides an intelligent operation and maintenance method and system for digital energy metering equipment based on a smart terminal APP, comprising: establishing a file for the digital energy metering device; acquiring and storing the recorded file data, report data, task data, and equipment operation data determined based on operation and maintenance supervision work of the digital energy metering device; querying the file data, report data, task data, and equipment operation data according to preset dimensions to obtain query results; and performing operation and maintenance of the digital energy metering device based on the query results. This invention is aimed at metering professionals in power grid companies, supporting them in quickly operating and maintaining metering devices such as digital energy meters, merging units, and electronic instrument transformers in substations. Firstly, it enables rapid querying and association of file information for metering devices such as digital energy meters, merging units, and electronic instrument transformers in substations through a smart terminal APP; secondly, it enables rapid calibration and operation and maintenance of digital energy metering devices in substations through a smart terminal APP, providing power company metering personnel with efficient operation and maintenance methods. Attached Figure Description

[0033] Exemplary embodiments of the present invention can be more fully understood by referring to the following figures:

[0034] Figure 1 A flowchart of an intelligent operation and maintenance method 100 for a digital energy metering device based on a smart terminal APP according to an embodiment of the present invention;

[0035] Figure 2 This is an architecture diagram of a digital energy metering device operation and maintenance APP according to an embodiment of the present invention;

[0036] Figure 3 This is an interactive diagram of a digital energy metering device operation and maintenance APP according to an embodiment of the present invention.

[0037] Figure 4 A flowchart for creating a file according to an embodiment of the present invention;

[0038] Figure 5 This is an interactive diagram illustrating a parameter query operation according to an embodiment of the present invention;

[0039] Figure 6 This is an interactive schematic diagram of the calibration operation according to an embodiment of the present invention;

[0040] Figure 7 This is a schematic diagram of the structure of an intelligent operation and maintenance system 700 for digital substation power metering equipment based on a smart terminal APP according to an embodiment of the present invention. Detailed Implementation

[0041] Exemplary embodiments of the invention will now be described with reference to the accompanying drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to fully and completely disclose the invention and to fully convey its scope to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the drawings is not intended to limit the invention. In the drawings, the same units / elements are referred to by the same reference numerals.

[0042] Unless otherwise stated, the terms used herein (including technical terms) have their common meaning as understood by one of ordinary skill in the art. Furthermore, it is understood that terms defined in commonly used dictionaries should be understood to have a meaning consistent with the context of their relevant field, and not to be interpreted as having an idealized or overly formal meaning.

[0043] Figure 1 This is a flowchart of an intelligent operation and maintenance method 100 for digital energy metering equipment based on a smart terminal APP according to an embodiment of the present invention. Figure 1 As shown, the intelligent operation and maintenance method for digital energy metering equipment based on a smart terminal APP provided by this invention is aimed at metering professionals in power grid companies. It supports their rapid operation and maintenance of metering devices such as digital energy meters, merging units, and electronic instrument transformers in substations. Firstly, it enables rapid querying and association of information on metering devices such as digital energy meters, merging units, and electronic instrument transformers in substations through the smart terminal APP. Secondly, it enables rapid calibration and maintenance of digital energy metering devices in substations through the smart terminal APP, providing power company metering personnel with efficient operation and maintenance methods. The intelligent operation and maintenance method 100 for digital energy metering equipment based on a smart terminal APP provided by this invention begins at step 101, where the digital energy metering device is documented.

[0044] Preferably, the digital energy metering device includes: a substation digital energy meter, a merging unit, and an electronic current transformer.

[0045] Preferably, the process of establishing records for digital energy metering devices includes:

[0046] Acquire images of the nameplate and barcode of the target digital energy metering device, perform image recognition, and obtain the device nameplate information and barcode information;

[0047] Asset matching and filing are performed based on the barcode information. If a corresponding digital energy metering device can be matched using the barcode information, the file data of the corresponding digital energy metering device is read. If a corresponding digital energy metering device cannot be matched using the barcode information, a file is created based on the nameplate information and barcode information, and the file creation is approved when the file review is passed.

[0048] The method of the present invention is based on Figure 2 The operation and maintenance of the digital energy metering device shown is implemented through an APP, which can be installed on smart terminals such as mobile phones and tablets. Figure 2 As shown, the data architecture of the operation and maintenance APP plans the data flow process from bottom to top, and is divided into mobile display layer, mobile application layer, storage layer, business application layer, and data display layer.

[0049] The mobile display layer is used for archiving digital metering devices. On-site personnel can carry out on-site operation and maintenance and supervision work according to standardized operation and supervision procedures, and report any problems found during the supervision process.

[0050] The mobile application layer is used to aggregate archive data, report data, and data such as operators, operation time, operation location, and task number collected from mobile devices, and push the data to the storage layer.

[0051] The storage layer is used to create archive data, report data, task data, etc. in the database.

[0052] The business application layer is used to acquire equipment files and report data by unit, site, metering point, and equipment. It processes data such as filing plans, filing tasks, and operation and maintenance and supervision tasks.

[0053] The data display layer is used to display the operating status data of digital metering devices; it provides functions such as file query and report query; and it provides operation and maintenance supervision and task management functions to support operation and maintenance supervision and management, and operation and maintenance supervision task management.

[0054] The configuration method of the operation and maintenance APP is as follows Figure 3 As shown, the maintenance app utilizes a cloud-edge collaboration model, deploying the application on mobile phones, tablets, and other terminals, and a database on the main site. The maintenance app, deployed as a micro-application on smart terminals, supports data entry tasks such as device profiles, calibration work, and monitoring problem descriptions. Its main site database can be configured with a cloud system to support data storage and display. Data security is ensured through information security isolation and other measures.

[0055] Taking a mobile phone as an example, the method for establishing a digital energy metering device file in a mobile APP according to the present invention is as follows: Figure 4As shown, image recognition technology is used to create files on-site. Specifically, image recognition technology identifies the nameplate and barcode of the measuring device. The first step is to match the device information in the cloud system database based on the device barcode number. The second step is to directly read the file if existing device information can be matched; otherwise, the file is created by reading or inputting parameter information based on the image recognition results. The third step is for staff to review the accuracy of the file and approve its creation.

[0056] In step 102, the archive data of the digital power metering device, the report data determined based on the operation and maintenance supervision work, the task data, and the equipment operation data are obtained and stored.

[0057] In this invention, the data entry and storage of archive data of digital power metering devices, report data determined by operation and maintenance supervision work, task data and equipment operation data are carried out based on the mobile application layer and the storage layer.

[0058] In step 103, the archive data, report data, task data, and equipment operation data are queried according to preset dimensions to obtain query results.

[0059] Preferably, the query results obtained by querying the archive data, report data, task data, and equipment operation data according to preset dimensions include:

[0060] The parameters of the digital energy metering device are obtained through an Ethernet interface to Bluetooth module / serial interface to Bluetooth module and transmitted to the smart terminal APP via Bluetooth. This enables the smart terminal APP to interact with the parameters in the main station database and return the database parameters to the smart terminal APP. The merging unit and the electronic current transformer correspond to the Ethernet interface to Bluetooth module, and the digital energy meter corresponds to the serial interface to Bluetooth module.

[0061] Taking mobile phones as an example, combined with Figure 5 As shown, an interface-to-Bluetooth module is configured, and a matching program for communication protocols for modifying parameters of different digital energy metering devices is integrated into the module. In the method for querying parameters of digital energy metering devices based on a mobile APP, the interface-to-Bluetooth module is used to read the parameters of the digital energy metering device via Ethernet (or serial interface), transmit the data to the mobile APP via Bluetooth, and the mobile APP interacts with the parameters in the main station database. The database can release stored parameters, and the mobile APP verifies the consistency between the main station data and the field data, and then uploads the parameters. Among them, devices such as merging units correspond to Ethernet connections, and digital energy meters correspond to serial interface connections.

[0062] In step 104, the operation and maintenance of the digital energy metering device is carried out based on the query results.

[0063] Preferably, the operation and maintenance of the digital energy metering device based on the query results includes:

[0064] The calibration instrument for the digital energy metering device is connected to the smart terminal APP via an Ethernet-to-Bluetooth module or a USB-to-Bluetooth module. The calibration report is automatically uploaded to the main station database via the smart terminal APP, and the calibration report can be queried based on the smart terminal APP.

[0065] Taking mobile phones as an example, combined with Figure 6 As shown, during operation and maintenance, digital energy metering devices can be calibrated via a mobile app. This is achieved by developing an Ethernet (or USB) to Bluetooth interface module, integrating a matching program for communication protocols used in transmitting calibration reports from different digital energy metering devices. Specifically, the calibration process is as follows: Figure 6 As shown, the calibrator can be connected to a mobile app via an Ethernet (or USB to Bluetooth) adapter to automatically record the calibration results from the calibrator.

[0066] The operation and maintenance method of this invention has been applied and tested in the Ningxia 110kV Ningdong Substation. It supports the metering personnel of Ningxia Power Company to quickly establish device file data, query device parameters, and carry out metering device calibration and other operation and maintenance, and solves the problem of operation and maintenance difficulties caused by information isolation between different professions after the device parameter settings are changed in actual operation.

[0067] The method of this invention can establish archive information of digital energy metering devices such as digital energy meters, merging units, and electronic instrument transformers in substations, and provide a method for querying parameters of digital energy metering devices; it can also establish a method for linking work orders such as fault diagnosis and metering calibration of digital energy metering devices in substations, and provide a method for rapid operation and maintenance of digital energy metering devices.

[0068] Figure 7 This is a schematic diagram of the intelligent operation and maintenance system 700 for digital substation power metering equipment based on a smart terminal APP, according to an embodiment of the present invention. Figure 7 As shown, the intelligent operation and maintenance method system 700 for digital power metering equipment based on a smart terminal APP provided by the embodiments of the present invention includes: a filing unit 701, a data acquisition unit 702, a query unit 703, and a calibration unit 704.

[0069] Preferably, the filing unit 701 is used to file digital energy metering devices.

[0070] Preferably, the digital energy metering device includes: a substation digital energy meter, a merging unit, and an electronic current transformer.

[0071] Preferably, the filing unit 701 files the digital energy metering device, including:

[0072] Acquire images of the nameplate and barcode of the target digital energy metering device, perform image recognition, and obtain the device nameplate information and barcode information;

[0073] Asset matching and filing are performed based on the barcode information. If a corresponding digital energy metering device can be matched using the barcode information, the file data of the corresponding digital energy metering device is read. If a corresponding digital energy metering device cannot be matched using the barcode information, a file is created based on the nameplate information and barcode information, and the file creation is approved when the file review is passed.

[0074] Preferably, the data acquisition unit 702 is used to acquire and store the recorded archive data of the digital power metering device, the report data determined based on the operation and maintenance supervision work, the task data, and the equipment operation data.

[0075] Preferably, the query unit 703 is used to query the archive data, report data, task data and equipment operation data according to preset dimensions to obtain query results.

[0076] Preferably, the query unit 703 queries the archive data, report data, task data, and equipment operation data according to preset dimensions to obtain query results, including:

[0077] The parameters of the digital energy metering device are obtained through an Ethernet interface to Bluetooth module / serial interface to Bluetooth module and transmitted to the smart terminal APP via Bluetooth. This enables the smart terminal APP to interact with the parameters in the main station database and return the database parameters to the smart terminal APP. The merging unit and the electronic current transformer correspond to the Ethernet interface to Bluetooth module, and the digital energy meter corresponds to the serial interface to Bluetooth module.

[0078] Preferably, the calibration unit 704 is used for the operation and maintenance of the digital power metering device based on the query results.

[0079] Preferably, the calibration unit 704 performs operation and maintenance of the digital energy metering device based on the query results, including:

[0080] The calibration instrument for the digital energy metering device is connected to the smart terminal APP via an Ethernet-to-Bluetooth module or a USB-to-Bluetooth module. The calibration report is automatically uploaded to the main station database via the smart terminal APP, and the calibration report can be queried based on the smart terminal APP.

[0081] The intelligent operation and maintenance system 700 for digital substation power metering equipment based on a smart terminal APP in an embodiment of the present invention corresponds to the intelligent operation and maintenance method 100 for digital power metering equipment based on a smart terminal APP for determining the operation quality of the power enterprise communication network in another embodiment of the present invention, and will not be described again here.

[0082] The present invention has been described with reference to a few embodiments. However, it will be apparent to those skilled in the art that other embodiments besides those disclosed above fall equivalently within the scope of the present invention.

[0083] Generally, all terms used in this invention are interpreted according to their ordinary meaning in the art, unless otherwise expressly defined herein. All references to “a / the / the [device, component, etc.]” ​​are openly interpreted as at least one instance of said device, component, etc., unless otherwise expressly stated. The steps of any method disclosed herein need not be performed in the exact order disclosed unless explicitly stated otherwise.

[0084] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can 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, etc.) containing computer-usable program code.

[0085] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can 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, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0086] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1The function specified in one or more boxes.

[0087] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the present invention.

Claims

1. A method for intelligent operation and maintenance of digital power metering equipment based on a smart terminal APP, characterized in that, The method includes: Establish files for digital energy metering devices; Acquire and store the archive data of the digital energy metering device, the report data determined based on operation and maintenance supervision, the task data, and the equipment operation data; The query results are obtained by querying the archive data, report data, task data, and equipment operation data according to preset dimensions. Operation and maintenance of digital power metering devices based on query results.

2. The method according to claim 1, characterized in that, The digital energy metering device includes: a substation digital energy meter, a merging unit, and an electronic instrument transformer.

3. The method according to claim 1, characterized in that, Establish records for digital energy metering devices, including: Acquire images of the nameplate and barcode of the target digital energy metering device, perform image recognition, and obtain the device nameplate information and barcode information; Asset matching and filing are performed based on the barcode information. If a corresponding digital energy metering device can be matched using the barcode information, the file data of the corresponding digital energy metering device is read. If a corresponding digital energy metering device cannot be matched using the barcode information, a file is created based on the nameplate information and barcode information, and the file creation is approved when the file review is passed.

4. The method according to claim 1, characterized in that, The query results are obtained by querying the archive data, report data, task data, and equipment operation data according to preset dimensions, including: The parameters of the digital energy metering device are obtained through an Ethernet interface to Bluetooth module / serial interface to Bluetooth module and transmitted to the smart terminal APP via Bluetooth. This enables the smart terminal APP to interact with the parameters in the main station database and return the database parameters to the smart terminal APP. The merging unit and the electronic current transformer correspond to the Ethernet interface to Bluetooth module, and the digital energy meter corresponds to the serial interface to Bluetooth module.

5. The method according to claim 1, characterized in that, Operation and maintenance of digital energy metering devices based on query results include: The calibration instrument for the digital energy metering device is connected to the smart terminal APP via an Ethernet-to-Bluetooth module or a USB-to-Bluetooth module. The calibration report is automatically uploaded to the main station database via the smart terminal APP, and the calibration report can be queried based on the smart terminal APP.

6. A smart operation and maintenance method system for digital power metering equipment based on a smart terminal APP, characterized in that, The system includes: The filing unit is used to file records for digital energy metering devices; The data acquisition unit is used to acquire and store the archive data of the digital energy metering device, the report data determined based on the operation and maintenance supervision work, the task data, and the equipment operation data. The query unit is used to query the archive data, report data, task data, and equipment operation data according to preset dimensions and obtain query results; The calibration unit is used for the operation and maintenance of digital energy metering devices based on query results.

7. The system according to claim 6, characterized in that, The digital energy metering device includes: a substation digital energy meter, a merging unit, and an electronic instrument transformer.

8. The system according to claim 6, characterized in that, The filing unit files digital energy metering devices, including: Acquire images of the nameplate and barcode of the target digital energy metering device, perform image recognition, and obtain the device nameplate information and barcode information; Asset matching and filing are performed based on the barcode information. If a corresponding digital energy metering device can be matched using the barcode information, the file data of the corresponding digital energy metering device is read. If a corresponding digital energy metering device cannot be matched using the barcode information, a file is created based on the nameplate information and barcode information, and the file creation is approved when the file review is passed.

9. The system according to claim 6, characterized in that, The query unit queries the archive data, report data, task data, and equipment operation data according to preset dimensions to obtain query results, including: The parameters of the digital energy metering device are obtained through an Ethernet interface to Bluetooth module / serial interface to Bluetooth module and transmitted to the smart terminal APP via Bluetooth. This enables the smart terminal APP to interact with the parameters in the main station database and return the database parameters to the smart terminal APP. The merging unit and the electronic current transformer correspond to the Ethernet interface to Bluetooth module, and the digital energy meter corresponds to the serial interface to Bluetooth module.

10. The system according to claim 6, characterized in that, The calibration unit performs operation and maintenance of the digital energy metering device based on the query results, including: The calibration instrument for the digital energy metering device is connected to the smart terminal APP via an Ethernet-to-Bluetooth module or a USB-to-Bluetooth module. The calibration report is automatically uploaded to the main station database via the smart terminal APP, and the calibration report can be queried based on the smart terminal APP.

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