Recently, some key words on the construction of the power grid, such as the construction of the “modern power grid systemâ€, the improvement of the “regional backbone power gridâ€, and the development of “UHV...transmission technologyâ€, which are announced in the “12th Five-Year Plan†announced recently, are attracting attention. Experts analyze that China's power grid construction in the next five years will be based on "adapting to the requirements of large-scale cross-regional transmission and new energy generation grid-connected", focusing on "improving the regional backbone power grid", accelerating the development of UHV transmission technology, and accelerating the construction of "modern power grid system" . The “Twelfth Five-Year Plan†for promoting cross-regional power transmission and new energy power generation proposes: “Adapt to the requirements of large-scale trans-regional transmission and new energy generation grid-connected, accelerate the construction of modern power grid system, further expand the scale of west-to-east power transmission, and improve the regional backbone The power grid, the development of high-capacity, high-efficiency, long-distance advanced transmission technologies such as UHV, relying on advanced technologies such as information, control and energy storage to promote the construction of smart grids, effectively strengthen the construction and transformation of urban and rural power grids, and enhance the power grid capacity and power supply for power grid optimization. Reliability.†At the same time, it is clearly required to “accelerate the construction of large-scale power transmission projects for coal-fired power, hydropower and wind power bases, and form a number of trans-regional transmission channels using UHV technologyâ€. Bai Jianhua, deputy chief economist and director of the Energy Strategy and Planning Institute of the State Grid Energy Research Institute, said in an interview with Xinhua News Agency that the so-called "modern power grid system" is actually based on "UHV transmission" and "relying on information, A smart grid system that is fully promoted by advanced technologies such as control and energy storage. Accelerate the construction of “modern power grid system†to promote “large-scale trans-regional transmission and new energy generation grid-connectedâ€, which indicates that the country has mentioned the issue of cross-regional transmission and new energy generation grid-connected in the “Twelfth Five-Year Planâ€. . Bai Jianhua said that the biggest feature of China's economic map is that energy resources are concentrated in the west and north, and the consumption areas are concentrated in the east and south. The country has planned and started the construction of large-scale coal-electricity integration bases in the west and north, and built in the southwest. The hydropower base will build large-scale wind power bases in Jiuquan, western Inner Mongolia, and Zhangbei, as well as the energy supply pattern of the future large nuclear power bases. This will inevitably require "large-scale, long-distance cross-regional transmission", and future development will depend on the construction of UHV transmission channels. According to Bai Jianhua, at present, China's wind power installed capacity is developing rapidly, and a wind power base with relatively concentrated wind power plants is formed. The installed capacity of the eight major wind power bases has accounted for 80% of the total installed capacity. The five major wind power bases are located in the Sanbei area (North China, Northwest China, Northeast China), and there is a serious abandonment of wind due to grid consumption problems. phenomenon. "The country started from this, and clearly set out the goal of grid-connected transmission and new energy power generation in the 'Twelfth Five-Year Plan'. To achieve this goal, only UHV transmission is needed." Bai Jianhua said, "especially for The integration of wind power is particularly important because wind power is unstable. Only by using UHV to integrate wind power into the large power grid and transmitting it to load centers in North China, Central China, and East China, wind power development can become a reality, and the wind abandonment problem can be effectively solved. He is optimistic that after the UHV transmission, the current problem of up to 25% of the wind is expected to be controlled at around 1%. The industry generally believes that 5% of grid abandonment is an allowable range. Comprehensively accelerate the construction of UHV transmission project Zhang Ke, deputy director of the development planning department of State Grid Corporation, told Xinhua News Agency that according to the plan, during the "Twelfth Five-Year Plan" period, the country will be built "Sanhua" (North China - Central China - East China), Northeast, The four major regional power grids in the northwest and the south; UHV DC transmission lines are built between the four regional power grids, and the “three vertical and three horizontal†UHV AC grids are built inside the “Sanhua†regional power grid. State Grid Corporation announced at the beginning of the year that it will invest more than 500 billion yuan in five years to build a "three vertical and three horizontal" UHV AC backbone network and 11 UHV DC transmission projects. The investment amount is equivalent to two Three Gorges projects, of which about two-thirds of the investment in UHV. Shu Yinyu, deputy general manager of State Grid Corporation, once again stressed at the company's 2011 UHV project construction work meeting held in Zhengzhou at the end of last month that UHV is the top priority of the “Twelfth Five-Year†grid development, and the project construction faces many new ones. challenge. He said: "The 'Twelfth Five-Year Plan' is a key period for accelerating the construction of UHV power grids. It is a tough period for continuously leading UHV technology. It is an opportunity period for consolidating and enhancing the capacity for independent innovation. It is a period of improvement in the control and control capabilities of UHV projects... ... In order to successfully achieve the UHV construction goals, we must insist on UHV as the top priority... Fully promote the scientific development of UHV power grids." The company is pushing hard to promote these major projects. The company's work conference document put forward this year, "To ensure that the Huainan (South Fujian)-Shanghai UHV AC project was approved in the first quarter, and strive to approve the Ximeng-Nanjing, Huainan (Nanjing)-Shanghai UHV exchange project in the first half of the year..." Zhang Ke revealed The start-up "roads" of these projects are working hard on time.
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