CN112347321A - Test management system for factory test of box-type transformer substation - Google Patents

Test management system for factory test of box-type transformer substation Download PDF

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Publication number
CN112347321A
CN112347321A CN202011239981.7A CN202011239981A CN112347321A CN 112347321 A CN112347321 A CN 112347321A CN 202011239981 A CN202011239981 A CN 202011239981A CN 112347321 A CN112347321 A CN 112347321A
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CN
China
Prior art keywords
test
box
data
factory
type substation
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Pending
Application number
CN202011239981.7A
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Chinese (zh)
Inventor
卞阳
陆斌
徐昌文
郑国荣
蒋震寰
叶长徽
缪忠杰
沈建浩
刘峰
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Hangzhou Power Equipment Manufacturing Co Ltd
Hangzhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Original Assignee
Hangzhou Power Equipment Manufacturing Co Ltd
Hangzhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
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Application filed by Hangzhou Power Equipment Manufacturing Co Ltd, Hangzhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd filed Critical Hangzhou Power Equipment Manufacturing Co Ltd
Priority to CN202011239981.7A priority Critical patent/CN112347321A/en
Publication of CN112347321A publication Critical patent/CN112347321A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/90Details of database functions independent of the retrieved data types
    • G06F16/903Querying
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00Measuring or testing not otherwise provided for
    • G01D21/02Measuring two or more variables by means not covered by a single other subclass
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/90Details of database functions independent of the retrieved data types
    • G06F16/903Querying
    • G06F16/9038Presentation of query results
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K17/00Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06QINFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q10/00Administration; Management
    • G06Q10/06Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
    • G06Q10/063Operations research, analysis or management
    • G06Q10/0639Performance analysis of employees; Performance analysis of enterprise or organisation operations
    • G06Q10/06395Quality analysis or management
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06QINFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
    • G06Q50/04Manufacturing
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/30Computing systems specially adapted for manufacturing

Abstract

The application discloses test management system of box-type substation factory test, including the integrated test terminal that has first wireless communication part and the data center that has the second wireless communication part of integration, test terminal is used for dispatching the factory test to box-type substation, and through first wireless communication part with data transmission to second wireless communication part in and save in data center, data center is connected with management terminal and customer end, management terminal is used for sending operating signal to test terminal based on administrator's instruction, the customer end is used for showing test terminal's data for the customer based on customer's data inquiry instruction. The test management system for the delivery test of the box-type substation can realize the networked and intelligent management of the delivery test of the box-type substation, simplify the test process, improve the working efficiency and ensure the safety and authenticity of test data.

Description

Test management system for factory test of box-type transformer substation
Technical Field
The invention belongs to the technical field of transformer substation testing, and particularly relates to a test management system for a factory test of a box-type transformer substation.
Background
The box-type substation is a brand-new substation rising after a civil substation, and plays an increasingly important role in a power system by the characteristics of high automation degree, flexible combination mode, investment conservation, short construction period and the like. The factory test of the box-type substation is the basis for guaranteeing the quality of the box-type substation and the stable and reliable operation of a power distribution network, but most of the current factory tests are off-line, each test needs to be manually wired according to test procedures, some test projects need to be operated repeatedly, the test process is complex, the intelligent degree and the automation degree are low, the test efficiency is low, test data records are still stopped in a discrete paper or digital file storage stage, the test data are not beneficial to test data sharing, once a certain department delays in the whole product quality inspection process, the whole production process is influenced, in addition, the standardized consciousness of testers is not strong, the tests are not orderly according to operation, and the damage to personnel and equipment can be caused. Therefore, how to improve the factory test efficiency of the box-type substation and ensure the factory quality of the box-type substation is a problem to be solved urgently in the work of the power system.
Disclosure of Invention
In order to solve the problems, the invention provides a test management system for a factory test of a box-type substation, which can realize networked and intelligent management of the factory test of the box-type substation, simplify the test process, improve the working efficiency and ensure the safety and authenticity of test data.
The invention provides a test management system for a factory test of a box-type substation, which comprises a test terminal integrated with a first wireless communication component and a data center integrated with a second wireless communication component, wherein the test terminal is used for performing the factory test on the box-type substation, transmitting data to the second wireless communication component through the first wireless communication component and storing the data in the data center, the data center is connected with a management terminal and a client, the management terminal is used for sending an operation signal to the test terminal based on an instruction of a manager, and the client is used for displaying the data of the test terminal to a client based on a data query instruction of the client.
Preferably, in the test management system for the delivery test of the box-type substation, the test terminal comprises a test terminal host, an intelligent test module, a power module and a fast wiring terminal panel.
Preferably, in the test management system for the factory test of the box-type substation, the client further includes a feedback module, which is used for feeding back problems found by the user in the use of the box-type substation to the data center.
Preferably, in the test management system for the factory test of the box-type substation, the test terminal host has an RS485 interface and a USB interface, and is used for connecting the intelligent test module.
Preferably, in the test management system for the delivery test of the box-type substation, the data center includes a database module, a test management module and an information pushing module, the test management module is used for controlling a plurality of departments to access the database module with corresponding authorities, and the information pushing module is used for pushing test related information to the plurality of departments.
Preferably, in the test management system for the delivery test of the box-type substation, the database module is an SQL Server database having a project information table, a product parameter data table, a production progress data table, a test plan data table, a test data table, a user information table, a mechanical property test table, a mechanical operation test table, and a general check table.
Preferably, in the test management system for the delivery test of the box-type substation, the intelligent test module includes an energization operation test unit, a transformer test unit, a main circuit resistance test unit and a circuit breaker performance test unit.
Preferably, in the test management system for the factory test of the box-type substation, the test terminal host includes a test object identification unit, a standardized communication interface, a display unit, and a test data input unit.
Preferably, in the test management system for the delivery test of the box-type substation, the test data input unit includes a text input subunit, a picture input subunit and a video input subunit.
Preferably, in the test management system for the delivery test of the box-type substation, the test object identification unit includes a barcode identification subunit, a two-dimensional code identification subunit, and a radio frequency identification subunit.
As can be seen from the above description, the test management system for the factory test of the box-type substation, provided by the invention, includes the test terminal integrated with the first wireless communication component and the data center integrated with the second wireless communication component, the test terminal is used for performing the factory test on the box-type substation, and transmits data to the second wireless communication component through the first wireless communication component and stores the data in the data center, the data center is connected with the management terminal and the client, the management terminal is used for sending an operation signal to the test terminal based on an instruction of a manager, and the client is used for displaying the data of the test terminal to a client based on a data query instruction of the client, so that networked and intelligent management of the factory test of the box-type substation can be realized, the test process is simplified, and the working efficiency is improved, and the safety and the authenticity of test data are ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic diagram of an embodiment of a test management system for a factory test of a box-type substation provided by the invention;
fig. 2 is a layered schematic diagram of a specific test management system for a factory test of a box-type substation;
FIG. 3 is a schematic flow chart of test data according to an embodiment of the present application;
FIG. 4 is a diagram of a database physical model according to an embodiment of the present application;
FIG. 5 is a functional diagram of a test management system according to an embodiment of the present application.
Detailed Description
The core of the invention is to provide a test management system for a factory test of a box-type substation, which can realize networked and intelligent management of the factory test of the box-type substation, simplify the test process, improve the working efficiency and ensure the safety and the authenticity of test data.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 shows an embodiment of a test management system for a factory test of a box-type substation, where fig. 1 is a schematic diagram of an embodiment of a test management system for a factory test of a box-type substation, the system includes a test terminal 2 integrated with a first wireless communication component 1 and a data center 4 integrated with a second wireless communication component 3, the test terminal 2 is used for performing a factory test on the box-type substation, and transmits data to the second wireless communication component 3 through the first wireless communication component 1 and stores the data in the data center 4, the data center 4 is connected with a management terminal 5 and a client 6, the management terminal 5 is used for sending an operation signal to the test terminal 2 based on an instruction of a manager, and the client 6 is used for displaying data of the test terminal 2 to a client based on a data query instruction of the client.
It should be noted that, as shown in fig. 2 specifically, fig. 2 is a layered schematic diagram of a test management system of a factory test of a box-type substation, and the test management system of the factory test of the box-type substation is divided into a test layer, a management layer and a user layer, where the test layer uses a test terminal 2 as a core, and adopts modularization to implement functions of obtaining a test plan, executing the factory test, analyzing test data, uploading test data, and the like, the management layer uses a data center 4 as a link, connects and cooperates a relevant department door to complete factory test work, and the user layer is used to receive a request of an equipment user, respond to data display, and feed back a product problem to the data center 4. The first wireless communication component 1 and the second wireless communication component 3 may be but not limited to Wi-Fi communication devices, and the test terminal 2 may also obtain a test plan through a Wi-Fi network, assist a tester to complete various tests in a programmed and intelligent manner, analyze test results and upload test data, thereby implementing information interaction between a test layer and a management layer.
As can be seen from the above description, in the embodiment of the test management system for the factory test of the box-type substation provided by the invention, because the testing terminal integrated with the first wireless communication component and the data center integrated with the second wireless communication component are included, the testing terminal is used for carrying out factory test on the box-type transformer substation, the data is transmitted to the second wireless communication part through the first wireless communication part and stored in the data center, the data center is connected with a management terminal and a client, the management terminal is used for sending an operation signal to the test terminal based on an instruction of a manager, the client is used for displaying the data of the test terminal to a client based on a data query instruction of the client, therefore, networked and intelligent management of the delivery test of the box-type transformer substation can be realized, the test process is simplified, the working efficiency is improved, and the safety and the authenticity of test data are ensured.
In a specific embodiment of the above test management system for the delivery test of the box-type substation, the test terminal 2 may specifically include a test terminal host, an intelligent test module, a power module, and a fast wiring terminal panel. The test terminal host is a control core of the test terminal, and the test terminal is coordinated to work in order to complete various delivery tests. The test terminal host is provided with test terminal software, the main function is to obtain a test plan and guide testers to complete various tests item by item and item by item according to the test plan, the test terminal host can be provided with an RS485 interface and a USB interface and used for being connected with an intelligent test module to complete programmed one-key test operation of various test projects, development of new test equipment can be carried out according to working requirements, and the test equipment can complete various tests by programmed one-key operation under the control of the test terminal host. In addition, the standardized communication interface can automatically acquire related test data with the existing tester and upload the test data to the data center. The intelligent test module can comprise a power-on operation test unit, a transformer test unit, a main loop resistance test unit and a circuit breaker performance test unit. The quick connection terminal block can realize quick connection with external equipment, the wiring speed is increased, and the wiring steps are simplified.
In another specific embodiment of the test management system for the box-type substation factory test, the client 6 may further include a feedback module, configured to feed back a problem found by a user in use of the box-type substation to the data center. Under the condition, the equipment user can inquire data of the data center through the Internet with a certain authority, track the production progress, the factory test result and the like of the equipment, and feed back the problems occurring in the running process of the equipment to a manufacturer, so that the optimization and improvement of the equipment by the manufacturer are facilitated.
In another specific embodiment of the above test management system for the factory test of the box-type substation, the data center 4 includes a database module, a test management module and an information pushing module, the test management module is configured to control a plurality of departments to access the database module with corresponding authorities, and the information pushing module is configured to push test related information to the plurality of departments. The system comprises a database module, a test management system and a general check table, wherein the database module is an SQL Server database which is provided with a project information table, a product parameter data table, a production progress data table, a test plan data table, a test data table, a user information table, a mechanical characteristic test table, a mechanical operation experiment table and a general check table, and can store various types of data in a classified manner, for example, a user name, a user password, a user authority, a user company, a user type and a device number are stored in a user table, a user inquires device information in an authority range according to all authorities, and the authority range is determined by a device coding list. And recording equipment test information from a fifth field in the test data table, and determining the name of a table of contents to be inquired by extracting the content of the field by a user to realize data storage and inquiry. The test management system can be factory test overall process management software developed by a B/S framework, each department in a management layer can access the system by a browser with certain authority, the information pushing module can realize the timely pushing of various information in test information flow, and when a certain node of a network completes the corresponding work, the data is uploaded to a data center, and the next work is pushed to the related department in a prompting mode.
In an embodiment of the above test management system for a factory test of a box-type substation, the test terminal host may include a test object identification unit, a standardized communication interface, a display unit and a test data input unit, and the test data input unit may include a text input subunit, a picture input subunit and a video input subunit, that is, the input of the test data may be implemented in a text, picture or video manner, and other manners may be adopted, and the test object identification unit may include a barcode identification subunit, a two-dimensional code identification subunit and a radio frequency identification subunit, that is, a barcode, a two-dimensional code or a radio frequency identification code on the test object may be swiped to identify which device is, and a type identification code may be used, which is not limited herein.
In summary, the testing terminal in the system adopts a modular integrated design and has a compatible testing interface and a testing module, and for different testing requirements, the testing modules and the existing tester establish communication with the testing terminal host through a standardized communication interface, and the modules complete the testing of the inspection project in a programmed one-key operation mode under the control of the testing terminal host. The data center is a set of data management analysis software and a database, and comprises a database, a test management system and an information pushing service, wherein the database provides a data storage function and stores various types of data such as equipment information, project information, test information and the like in a classified manner, the test management system is factory test overall process management software developed by a B/S framework, and each department in the management layer can access the system by a browser with certain authority.
Referring to fig. 3, fig. 3 is a schematic diagram of a test data flow according to an embodiment of the present application, where a quality inspection department, a test terminal, and a production department perform information interaction through a data center. The quality inspection department accesses a database and a data sheet related to the test project through the test management system to generate a test plan, the test terminal acquires corresponding product information by identifying a test object code, and rapidly retrieves and acquires the test plan from the data center by utilizing Wi-Fi (wireless fidelity), develops a programmed test, analyzes test data and uploads the test data. Once the product has quality problems, the information pushing service pushes the related product information to a production department for maintenance and retest until the product quality reaches the standard, and finally, a delivery test report is generated by an inspection department. In addition, the sales department can complete project information and user information filling and uploading work according to product orders, and after a production department receives a new production task, the production department can produce a unique identification code for each product, so that each subsequent department can quickly identify the product, and the test work efficiency is improved. The equipment user can also access the data center through the Internet network, know the production progress and quality of the product, or feed back the problems found in the use process of the product through the data center, so as to be beneficial to the improvement of the product.
Referring to fig. 4, fig. 4 is a diagram of a physical model of a database according to an embodiment of the present application. The data center stores various types of data in the factory test process, and an SQL Server database is adopted and comprises a project information table, a product parameter data table, a production progress data table, a test plan data table, a test data table, a user information table, a mechanical characteristic test table, a mechanical operation test table, a general check table and the like. Such as user name, user password, user privileges, user company, user type, and device number in the user table. And the user inquires the equipment information in the authority range according to all the authorities, wherein the authority range is determined by the equipment coding list. And recording equipment test information from a fifth field in the test data table, and determining the name of a table of contents to be inquired by extracting the content of the field by a user to realize data storage and inquiry.
Referring to fig. 5, fig. 5 is a functional diagram of a test management system of an application embodiment. The test management system software is test management software developed by a B/S framework, and is a coordination scheduling center of the whole factory test management system, related departments realize the functions of test plan generation, database management, test data query, user management and the like through the test system management software, wherein the use rights of all departments in the test management system software are different according to different responsibilities of the related departments, for example, a quality inspection department can not only complete the conventional functions of test plan generation, test data retrieval query and the like, but also can perform high-permission operations such as increasing, deleting, modifying and the like on a data table, and the like, and the transmission of factory test data is accelerated by using the test management system software as a link among multiple departments, so that the understanding of the related departments on the test data is facilitated, the optimized design of products is realized to the greatest extent, and the product quality is improved.
The system closely relates a test layer, a management layer and a user layer, wherein the test layer takes a test terminal as a core and adopts a cooperative operation mechanism to assist testers to intelligently and orderly finish a product delivery test, the management layer is the core of test information interaction and delivery test management, all departments of an enterprise collaborate to participate in the whole delivery test process, the user layer provides an Internet external network access function to lay a foundation for the test data use of equipment users and the product problem feedback, the test terminal adopts a modularized integrated design and is provided with a compatible test interface and a test module, aiming at different test requirements, each test module and an existing tester establish communication with a test terminal host through a standardized communication interface, and each module finishes an inspection project test in a programmed one-key operation mode under the control of the test terminal host. The test data exchange process takes a test management system as a management core and takes a database as a test data transfer station. The multiple departments manage delivery tests through the test management system and push test data to the database for storage, and each department realizes information exchange among the multiple departments through accessing the database.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The test management system for the factory test of the box-type substation is characterized by comprising a test terminal integrated with a first wireless communication component and a data center integrated with a second wireless communication component, wherein the test terminal is used for performing the factory test on the box-type substation, transmits data to the second wireless communication component through the first wireless communication component and stores the data in the data center, the data center is connected with a management terminal and a client, the management terminal is used for sending an operation signal to the test terminal based on an instruction of a manager, and the client is used for displaying the data of the test terminal to a client based on a data query instruction of the client.
2. The factory test management system of the box-type substation according to claim 1, wherein the test terminal comprises a test terminal host, an intelligent test module, a power module and a quick wiring terminal panel.
3. The factory test management system for the box-type substation according to claim 1, wherein the client further comprises a feedback module for feeding back problems found by a user in use of the box-type substation to the data center.
4. The factory test management system of the box-type substation according to claim 2, wherein the test terminal host has an RS485 interface and a USB interface for connecting the intelligent test module.
5. The factory test management system of the box-type substation, according to claim 1, characterized in that the data center comprises a database module, a test management module and an information pushing module, wherein the test management module is used for controlling a plurality of departments to access the database module with corresponding authorities, and the information pushing module is used for pushing test related information to the plurality of departments.
6. The factory test management system for the box-type substation according to claim 5, wherein the database module is an SQL Server database having a project information table, a product parameter data table, a production progress data table, a test plan data table, a test data table, a user information table, a mechanical property test table, a mechanical operation test table and a general check table.
7. The factory test management system of the box-type substation according to claim 2, wherein the intelligent test module comprises a power-on operation test unit, a transformer test unit, a main loop resistance test unit and a circuit breaker performance test unit.
8. The factory test management system for the box-type substation according to claim 2, wherein the test terminal host comprises a test object identification unit, a standardized communication interface, a display unit and a test data input unit.
9. The factory test management system for the box-type substation according to claim 8, wherein the test data input unit comprises a text input subunit, a picture input subunit and a video input subunit.
10. The system for testing and managing factory tests of box-type substations according to claim 8, wherein the test object identification unit includes a barcode identification subunit, a two-dimensional code identification subunit and a radio frequency identification subunit.
CN202011239981.7A 2020-11-09 2020-11-09 Test management system for factory test of box-type transformer substation Pending CN112347321A (en)

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CN103996142A (en) * 2013-02-16 2014-08-20 上海思创电器设备有限公司 Electrical test measurement and control management method based on portable terminal
CN204731342U (en) * 2015-06-30 2015-10-28 国网山东省电力公司电力科学研究院 A kind of mobile terminal for transformer field test
CN107192945A (en) * 2017-06-30 2017-09-22 中国西电电气股份有限公司 A kind of network high-tension switch gear trial system and method
CN111208763A (en) * 2020-01-15 2020-05-29 安徽华明电气设备有限公司 Box-type substation maintenance management system and method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090307763A1 (en) * 2008-06-05 2009-12-10 Fiberlink Communications Corporation Automated Test Management System and Method
CN103996142A (en) * 2013-02-16 2014-08-20 上海思创电器设备有限公司 Electrical test measurement and control management method based on portable terminal
CN103647686A (en) * 2013-12-19 2014-03-19 北京伊神华虹系统工程技术有限公司 Data monitoring and management system and method
CN204731342U (en) * 2015-06-30 2015-10-28 国网山东省电力公司电力科学研究院 A kind of mobile terminal for transformer field test
CN107192945A (en) * 2017-06-30 2017-09-22 中国西电电气股份有限公司 A kind of network high-tension switch gear trial system and method
CN111208763A (en) * 2020-01-15 2020-05-29 安徽华明电气设备有限公司 Box-type substation maintenance management system and method

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