Application of quality inspection and control system to make transmission lines more efficient

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Application of quality inspection and control system to make transmission lines more efficient

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The testers use the quality inspection and control system to test the basic data of the Baihetan-Jiangsu ±800kV UHVDC transmission project

In the Geotechnical Engineering Laboratory of the China Electric Power Research Institute, the testers used the "Transmission Line Tower Foundation Quality Inspection and Control System" (referred to as the quality inspection and control system) to remotely complete the Nanchang-Changsha 1000 kV UHV line project photos, geographical location and other information review work, confirmed the latest test quantity and test conclusions. The testing personnel use the quality testing control system, which saves the time of traveling to and from each tower on the project site, and can manage the data of the test results at the first time at any location, which greatly improves the work efficiency and ensures the quality of the project construction.

In recent years, State Grid Corporation of China has vigorously promoted the quality inspection of iron tower foundations in UHV projects, and China Electric Power Research Institute has undertaken the main work. Different from general industrial buildings, transmission line engineering iron tower foundation quality inspection has the characteristics of dispersion, dynamics, various data types, large amount of information, and complex supervision process. Inspectors face new challenges in the work of iron tower foundation quality inspection. The main problems such as difficulty in traceability of paper testing data, low efficiency, slow update of testing progress, and opaque testing process.

In order to solve the above problems, since June 2018, the China Electric Power Research Institute has established an informatization research team. On the basis of fully learning from the research results of construction, transportation and other industries, the research team combines the basic characteristics and management and control requirements of transmission lines, and integrates information technologies such as the Internet of Things, mobile Internet, intelligent sensing, and global positioning systems to develop the basic quality inspection of transmission line towers control system.

The research team installed a data wireless communication module on the original basic testing equipment, adopted the system architecture based on "cloud platform + cloud + application", developed special mobile phone application software and standardized the data interface. On the cloud server, the research team set up a World Wide Web service program and a control database to store, process and display detection information. In view of the basic detection characteristics of transmission line towers, in order to meet the needs of carrying out detection work in areas without signal in the wild, the research team added an offline login function to the mobile phone application. At the same time, in order to prevent the missed detection of the tower base, an automatic location verification reminder function is set up for the mobile phone application.

In 2019, the research team completed the research and development task of the quality inspection and control system. Using this system, the research team can conduct online filing of transmission line construction projects, participating units, personnel, equipment, testing plans, testing data, testing reports, etc., realizing a paperless office and a comprehensive inspection of all stages of the tower foundation testing activities.

From 2020 to this year, in order to further improve and verify the function and performance of the quality inspection and control system, the research team has repeatedly tested and debugged the system at multiple engineering sites. After several optimization iterations, the system meets the requirements for on-site use in terms of network security, multi-network support, real-time data transmission, compatibility, and response time.Compared with the before, the application of this system reduces the data transmission process, and can timely and accurately detect the quality problems of the tower foundation and take immediate measures. The system has obtained the software copyright registration certificate issued by the National Copyright Administration.

The research team used the system for the first time in the quality inspection of the iron tower foundation of the Nanchang-Changsha 1000 kV UHV line project. At present, the system realizes the uploading and online management of static load test, high strain PDA test, low strain PIT test, crosshole sonic logging test, bolt and drill core data, and has been applied to the northern Shaanxi-Hubei ±800kV UHV DC transmission project, Baihetan-Jiangsu ± 800 kV UHV DC transmission project and other UHV engineering tower foundation quality inspection and control work.