December 25, cold, Pentium River has become quiet in the sea. New District in Xining City, the National Grid Xining Power Supply Company 110 kV Shuishuihe intelligent substation, the staff after commissioning the equipment , The substation was put into operation formally, and the first underground trans-river power corridor in Qinghai, which is a substation supporting project, was completed and run.
Engineer introduced intelligent support system
The staff is debugging the system
It is the first time that the power corridor across the river is built in our province and its construction has accumulated rich experience for similar projects in the future and also laid a solid foundation for further optimizing power grid structure and power quality in Xining. "Chief Engineer Xu Shishan told reporters.
According to the design of intelligent substation, the first equipment adopts "a device body + intelligent component" to realize the intelligent and static investment of 197840000 yuan, the dynamic investment of 201950000 yuan, the planning main transformer capacity is 3 × 63 MVA, initial construction 2 × 63 MVA, 110 kV final 3 return lines, the installation of 5 circuit breakers, once completed, 10 kV final 36 back to the outgoing line, the initial construction of 24 back to the line, the installation of 33 circuit breakers.
The substation's underground river power corridor is located in the core area of Haihu New District with an elevation of 2,400 meters and a total length of 345 meters. Although we mainly used advanced construction techniques such as advanced exploration, curtain grouting and shallow burying, Hard difficulty, but also pay attention to prevent permeable, but we have overcome, in the history of power construction in Qinghai is of great significance. "Xu Shishan Road.
Reporters on the scene saw the appearance of the substation with the other side of the Swish River Salzburg Salzburg form a response to the formation of the consistency of the landscape, and underground river construction is also to make the city's development more beautiful and harmonious, This construction method will not cause damage to the surrounding roads and landscapes, and will not affect the daily travel of surrounding residents.
In the specific excavation process, large-sized machinery can not enter due to the influence of complex ground topography such as the shallow water table and rock layers throughout the Huangshui River. In order to ensure the construction technology, safety, quality and operation progress, the State Grid Qinghai Electric The Bank dynamically adjusted operational risks and hired domestic senior engineers to provide professional training for construction teams so that construction workers can fully grasp the construction technology.
'Shallow and undercutting excavation process is the use of artificial bit by bit digging, the average daily dredging about two meters, the middle to overcome the rock excavation, serious underground water seepage, safety factor and other difficulties, after more than 210 days of hard work, Ensure that the pipe gallery schedule on time, quality and quantity through. "Xu Shishan said.
As the new 110-kilovolt Dingtao substation to cross the Xijiao Expressway, coupled with the extremely cold weather, for the construction of great difficulties, the State Grid Xining actively communicate with the relevant government departments, organized several construction site will be held , Closely formulate the sealing operation plan and measures to overcome a series of difficulties such as the severe weather, high danger coefficient and large construction intensity, and ensure the smooth passage of the expressway through a series of continuous high-altitude construction operations of just 4 days The total length of 593 meters of the highway display.
As one of the important projects for the upgrading of Xining distribution network, the 110 kV Shuishui River Power Transmission and Transformation Project, with its full operation, will provide a steady stream of clean power for the green development of Xining and will also satisfy the entire Haihu New District and green space, Wanda and other major shopping district in the next 20 years the development of electricity load demand.