Xining.com Xining June 4th (Luo Yunpeng Sun Yichen) On the 4th, the reporter learned from China National Grid Qinghai Electric Power Company that the Qinghai Haixi-main network transmission channel capacity improvement project entered the power outage construction phase, during the 17-day power outage construction period. It will complete the hoisting work of the first 750 kV series compensation engineering platform in China. After the project is put into operation, it will solve the problem of large-scale photovoltaic power transmission restriction in the Haixi area of ​​Qinghai.
The picture shows the construction site of the 750 kV series repair project. Photo by Zou Jianhua
The theoretical installed capacity of solar energy in Qinghai can reach 4.7 billion kilowatts, accounting for about 11% of China. It is an important area of ​​solar photovoltaic power generation in Qinghai Province in the Haixi Mongolian Tibetan Autonomous Prefecture of Qinghai Province in the hinterland of Qaidam. According to the statistics of China State Grid Qinghai Electric Power Company, as of the end of 2017, Qinghai New Energy installed 9.53 million kilowatts, accounting for 37.5% of the total installed capacity of Qinghai Power Grid.
As the first 750 kV series repair project in China, this power outage involves 5 transmission lines of 750 kV Yuehai Line, Haichai Line and ±400 kV Chai Line. It is the largest power outage construction of Qinghai Power Grid in recent years. operation.
The picture shows the construction site of the 750 kV series repair project. Photo by Zou Jianhua
"This time during the power outage construction, it is necessary to complete the hoisting of 46 750 kV frame, the removal of the 9-base of the tower, the construction of the new tower 3 and the electrical installation." Zhang Jianhua, the general manager in charge of the construction, introduced that during this period, Qinghai The Haixi 750 kV line is sent out to carry out the construction of the Qinghai-Tibet Railway. The construction of the project faces many difficulties, such as less construction experience, short effective construction time, multiple cross-operations in various professions, and heavy power-saving tasks.
It is understood that the construction uses a number of scientific and technological innovations and new materials, such as the use of animation to carry out on-site technical simulation, independent design software to accurately calculate the stability of the frame and the material used for the arrester; at the same time use high strength in concrete mixing Grouting material, a new material, can meet the design requirements with 48-hour strength, which helps to improve the quality and efficiency of the construction and ensure the construction progress.
Wu Tongsheng, head of the on-site command team of the Haixi Substation, said that the project is expected to be completed and put into operation in November 2018. The operating time is expected to be 45 days in 2018. After the addition of string compensation, it can be increased. Qinghai's new energy consumption space is 570 million kWh, which can increase the total consumption of 780 million kWh.
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