UHV power grid four major practical significance
“In the past, people’s attention was focused on whether the UHV could succeed. Now that we have built and successfully operated the “two straight and one on the other hand†UHV demonstration project, people began to pay attention to what role the UHV can play?†At the 3rd China Electric Power Development and Technological Innovation Academicians Forum, Huang Qili, academician of the Chinese Academy of Engineering and Honorary Chief Engineer of the Northeast Division of the State Grid Corporation of China, believes that the practical significance of the UHV is being highlighted. So, what is the practical significance of the UHV grid?
At first glance, this topic is too big. Through stratification, we know that UHV power grids have basic functions of large-scale, large-scale, large-capacity, and high-efficiency energy resource allocation, and can significantly increase the power transmission capacity, increase the distance of economic transmission, and improve the safety and stability of large power grids. . There are four practical implications for the detailed analysis: First, energy is enriched in the western region of China, and the load in the eastern region is concentrated. Energy is transferred from a place where the energy sources are more heavily concentrated, and UHV technology must be used. It is said that UHV has realized large-scale long-distance transmission, which is a reasonable way to promote the optimal allocation of energy resources; secondly, the third-generation power grid with UHV power grid as the backbone is from the beginning of design. Taking into account the need to accept renewable energy and networking, this is the practical significance of UHV to promote the development of clean energy; Third, UHV power grid and technology, need equipment manufacturing industry to upgrade simultaneously, which promotes the progress of domestic equipment manufacturing industry Fourth, it can build a large channel for intercontinental energy transmission. For example, the Sahara Desert has abundant and exploitable solar energy resources, but sparsely populated areas can not absorb so much electricity and it is only allowed to waste it. Now, with UHV, it is entirely possible to transport energy from the Sahara to the available areas and solve the problem of human energy use.
Since January 2009, the State Grid Corporation of China has built a 1000 kV AC pilot demonstration project in southeast Shanxi, Jingmen, ±800 kV DC project in Xiangjiaba, Shanghai, and 800 kV DC transmission in Sichuan Jinping-Jiangsu Sunan. Engineering and other 3 UHV AC and DC projects with the highest voltage, largest capacity, and advanced technology have been operating safely for a total of over 80 billion kilowatt-hours of power transmission, which fully validates the safety, economy, and environmental friendliness of UHV. . The UHV’s success has achieved “representing coal by electricity, replacing electricity with electricity, and electricity from afarâ€, which indicates that the development of the national power grid has entered a new stage with UHV as the lead, and intelligence as the direction and comprehensive innovation and development.
During the "Twelfth Five-Year Plan" period, UHV is an inevitable choice for power grid construction from the perspectives of energy demand, large-scale deployment of power over long distances, and the state's encouragement of high-end equipment manufacturing with independent technology. Therefore, promoting the optimal allocation of energy resources, accelerating the development of clean energy, stimulating the upgrade of equipment manufacturing industry, and building an intercontinental aisle encompasses the practical role of the UHV.
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