The most popular Three Gorges Project as the cente

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Three channels of West to East power transmission with the Three Gorges Project as the center speed up this year, Build Lianhe transmission lines in four directions, East, West, North and south. At the same time, this year will expand the north, central and South three main

the relevant person in charge of the State Power Corporation recently said that in order to cope with the shortage of power supply, China will take the Three Gorges Project as the center, rely on Huazhong power, radiate in the four directions of East, West, North and south, and build Lianhe transmission lines in the four directions of East, West, North and south. At the same time, the scale of the three main west to East power transmission channels in the north, the middle and the South will be expanded this year to speed up the pace of West to East power transmission

according to the characteristics and development trend of China's electricity, in order to promote the optimal allocation of power resources in a wider range, the State Power Corporation has formulated the development strategy of "west to East power transmission, north-south mutual supply, and nationwide connection", and the process of trans regional connection and trans regional transmission has been greatly accelerated

the main body of power transmission from the west to the East is three channels: Beitong suggests that such problems mainly include two parts: first, develop Inner Mongolia West and Shanxi coal power in North China power, and build corresponding AC transmission channels to transmit power to Beijing, Tianjin, Hebei and Shandong respectively; The second is to develop coal-fired power in Northern Shaanxi, Gansu Qinghai Ningxia hydro thermal power, and power transmission in Beijing, Tianjin and Hebei. The middle passage is planned as follows: the Xiluodu and Xiangjiaba hydropower stations in the lower reaches of Jinsha River are planned to start construction in, and the units will be put into operation successively in to transmit power to East and central China. Nantong road will mainly use 500kV AC/DC hybrid mode to transmit power to Guangdong and Guangxi

in terms of North-South mutual power supply and cross regional power interconnection, during the "Eleventh Five Year Plan" period, in addition to the implementation of the defined Three Gorges Right Bank to Shanghai DC project, the main projects planned to be constructed include the northwest to North China DC transmission project, the northwest and Sichuan Chongqing joint project, (3) the damage tolerance method is based on fracture mechanics. When the damage tolerance method is used to calculate the fatigue life, the critical crack length of the material is first determined according to the fracture toughness of the material; Then the initial length of the crack in the part was confirmed by nondestructive testing and other methods. The project of back-to-back connection between central China and North China was carried out. At the same time, the power transmission from Yangcheng, Shanxi Province to East China was strengthened and the connection between North China and East China was realized. At the end of the 11th Five Year Plan period, in coordination with the development of the Three Gorges underground power station, a DC transmission project to transmit power to North China will be built, and a trunk channel supported by the Three Gorges will be formed between the north and the south

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