The construction of Qinghai Tibet ± 400kV DC interconnection project has encountered two “world’s most” with the highest altitude and the longest frozen soil area along the line, which need to be overcome “It is difficult to guarantee the plateau’s physical health, the plateau’s ecological environment is extremely fragile, and the construction of plateau frozen soil foundation is difficult” Three major worldwide problems.
Outstanding scientific research achievement unit: Qinghai power transmission and Transformation Engineering Co., Ltd.
The project has conducted in-depth analysis and Research on the special geological conditions and harsh climate environment such as permafrost and seasonal permafrost, desert Gobi and saline soil in high-altitude areas.
award Name: won the second prize of Qinghai Provincial Science and technology progress award issued by Qinghai Provincial People’s government.
It innovatively adopts Unconventional Construction Technology for plateau permafrost, shortens the exposure time of frozen soil, avoids the disturbance and thawing settlement of permafrost, and adopts the step-by-step equal angle division method for accurate positioning The self-designed multi-functional fixer and feeding steel rod welding process effectively solve the problems that it is difficult to ensure the purity of grounding electrode ring carbon bed and the welding quality of feeding steel rod in desert areas; a special aerial work platform is designed to effectively solve the problem of tilting and accurately hoisting the super long bushing of large converter transformer in place by adjusting the stress and cutting angle of two coordinates; create The installation control technology and management specification of “five levels of dust prevention, three items of detection and one card control” are introduced, which effectively solves the problem of gas insulated metal enclosed switchgear (GIS) in desertification saline land area The achievements have comprehensively improved the construction quality of Qinghai Tibet DC interconnection project, provided high-quality power guarantee for regional economic development, promoted the rapid growth of GDP in the whole province, and “Qaidam Basin circular economy pilot zone” Large scale development has far-reaching practical and political significance.
Producer: Mi Liansheng reviewed by: Li Yanping editor: Hu Yueguang typesetting: Kong Shande Zhou Xiaokun..
