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Recently, the State Grid Corporation of China's scientific and technological achievements "on-line detection and dynamic evaluation technology and application of atmospheric corrosion of electrical metal materials" has reached the international leading level after identification. This is another achievement made by the "Power Grid Material Corrosion and Protection Technology Team" of the State Grid Corporation of China.
A few days ago, the scientific and technological achievements of State Grid Corporation of China "On-line detection and dynamic evaluation technology and application of atmospheric corrosion of electrical metal materials" have reached the international leading level after identification. This is the scientific and technological research team of State Grid Corporation of "Grid material corrosion and protection technology" Another result achieved by the team.
The team led by Li Xingeng, the chief expert of Shandong Electric Power Research Institute of State Grid, is adhering to the innovative concept of "success stems from the persistence of trying again", constantly overcoming difficult problems, and establishing online intelligence through advanced corrosion detection technology. Atmospheric corrosion monitoring platform. In 2016, the world's first regional dynamic atmospheric corrosion map was drawn, which can accurately grasp the atmospheric corrosion of the monitoring area in real time, and is used for the selection of anti-corrosion design materials, equipment selection and operation of transmission and transformation project. Maintenance and risk control provide accurate decision-making data support, build a dynamic corrosion auxiliary analysis and evaluation system, and realize long-term stable detection of atmospheric corrosion behavior of metal materials.
A comprehensive overview of the map for real-time evaluation of atmospheric corrosion
"It is very interesting to recall the inspiration for creating the world's first regional dynamic atmospheric corrosion map." Wang Xiaoming, a member of the team, said, "Atmosphere Corrosion diagrams are an important tool for guiding engineering anti-corrosion, but due to the lack of data and old, the original corrosion diagrams are not easy to use. During another project promotion meeting, I discussed this matter with the chief expert Li Xingeng, and we collided. The idea of using sensor data to draw corrosion maps."
For scientific researchers, there is nothing impossible, only unexpected. A good idea is the most precious. In 2012, the chief expert Li Xingeng led the team to create the world's first regional dynamic atmospheric corrosion map.
The dynamic atmospheric corrosion map is made up of an instrument specially used to detect atmospheric corrosion (intelligent atmospheric corrosion detector),Continuously detect the corrosion rate of standard metal materials exposed to the inspection site in real time, and use modern wireless communication technology to transmit the data back to the computing center, and the computer intelligent analysis system calculates and automatically draws the atmospheric corrosion map. Compared with traditional atmospheric corrosion maps, dynamic atmospheric corrosion mapping does not require tedious manual long-term exposure corrosion test detection, can directly reflect the real-time corrosion situation of metal materials in the regional atmospheric environment, and can update the data online in real time.
In the process of creating the world's first regional dynamic atmospheric corrosion map, the team also encountered countless roadblocks. "Traditional cross-type, comb-type and interval-type sensors do not respond under low humidity, cross-contamination of the cathode and anode corrosion products of the sensor, low detection accuracy, short life, and cannot meet the needs of long-term outdoor use." Fan Zhibin, a member of the team, said, " Through countless tests, the innovative design of the mesh laminate structure has improved the sensitivity of the sensor. The use of inert cathodes avoids the cross-contamination of cathode and anode corrosion products, improves the detection accuracy and service life, and successfully solves the problem. Problem."
Today, the regional dynamic atmospheric corrosion map technology created by the team uses a smart atmospheric corrosion detector deployed on site to detect and transmit data once every 10 minutes, including corrosion current, relative humidity, and temperature, which are analyzed and processed by the platform , 24 hours to update a picture. Solved the problem of too long period of time to build and update the atmospheric corrosion map, and the data lags behind the environmental change, and realized the real-time evaluation of atmospheric corrosion of the atmospheric environment. The mapped data can not only follow the changes of environmental conditions, but also long-term monitoring and correction of evaluation results.
Comprehensively promote the realization of stable detection to ensure the safety of equipment
The implementation of the dynamic atmospheric corrosion map project can fully grasp the environmental corrosion law and geographical distribution characteristics of power grid component materials, master the environmental corrosion detection and evaluation technology of power grid materials, and reduce the damage caused by corrosion Hidden dangers of the power grid. It can produce significant economic and social benefits in the anti-corrosion design, operation and maintenance of power transmission and transformation equipment, which is in line with the development of national big data and the construction of State Grid Corporation. It has Chinese characteristics International leading energy Internet enterprise and "One Four" "Wing" development layout related requirements.
Once, when the team analyzed the atmospheric corrosion map drawn, it was found that in an agricultural area in a plain, the corrosion data was abnormally high, which was quite different from the prediction. The project team immediately dispatched technical personnel to conduct on-site inspections. After field investigations, it was found that there are many small workshop-type chemical plants in the local area, resulting in an increase in the corrosion factors in the atmospheric environment. The map shows that the corrosion data is abnormally high.
Establish a corrosion and protection evaluation system for power transmission equipment materials based on dynamic atmospheric corrosion maps, which can provide important data support for differentiated anti-corrosion design, project life prediction, and operation and maintenance, to ensure equipment safety and improve anti-corrosion technology and economy Sex plays an important role. As of November 2021, Zhongshi Yitong Company of the institute has completed the promotion and application of the results in 10 network provinces including Shandong, Jilin, Anhui, Sichuan, Fujian, Liaoning, and Shaanxi. The State Grid Headquarters has accumulatively connected to intelligent atmospheric corrosion There are 316 detectors, which are planned to be fully promoted in the State Grid system, with a total of more than 20 million sets of access terminals. Among them, Shandong, Jilin, Anhui, Sichuan, Fujian, Shaanxi, Chongqing, Zhejiang and Hunan have access to data for mapping conditions. Shandong, Jilin, Liaoning, Shaanxi, Anhui, and Fujian have completed the construction of substation system platforms. Anhui, Sichuan, Fujian, Shaanxi, Liaoning, Chongqing, Zhejiang, and Hunan have completed the terminal deployment and installation work and the data has been connected to the main station of the State Grid Corporation.
"Take ceaselessness as the body, and daily innovation as the way." The team has taken nearly 10 years to continuously research and develop dynamic atmospheric corrosion map technology, which is convenient for users. By reading the map, the atmospheric corrosion level of the place of interest can be easily and quickly obtained to determine the severity of corrosion of the materials exposed to the atmospheric environment and provide a basis for formulating corrosion protection technology strategies.
In the next step, the team will deploy the "Smart Atmospheric Corrosion Detector" detection station in the area covered by the Shandong company in the project of "Data Mining Based on Grid Atmospheric Corrosion Map and Service Life Evaluation Technology of Grid Equipment" to obtain the atmospheric environment For the original data of metal corrosion, the State Grid Corporation of China's "Smart Atmospheric Corrosion Detection Platform System" is built online, which can output the "State Grid Dynamic Atmospheric Corrosion Map" and the site's corrosion evaluation results in real time, which can be used by more than 100 licensed users at the same time Access, browse and download user demand data in order to increase the application of project results and broaden its scope of application,Let the corrosion dynamics of power transmission and transformation equipment in the atmosphere be fully visible in real time, and make outstanding contributions to the corrosion and protection of power transmission and transformation equipment.
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