10.04.2018
March 12, “People’s Daily” online — In 0.0008 seconds, wind and solar energy from Gansu City is sent to a conversion station in Xiangtan City District of Hunan Province. This amazing technology of a high-voltage power line of ±800 kilovolts was awarded the state prize of the highest degree for its contribution to scientific and technological progress in China in 2017.
The technology of direct current transmission with a high voltage of ±800 kilovolts is the most advanced power transmission technology in the world with high voltage, maximum transmission capacity and transmission distance. Thanks to this technology, the ability to transfer energy on a large scale and over long distances is significantly increased. Thus, the possibility of highly efficient development and large-scale deployment of clean energy has appeared.
Simultaneously with the steady progress of the construction of a high-voltage energy network, the stimulation of energy transformation in the world is accelerating, and the construction of a global energy network has been given an impetus. Against the background of global trends in the electric power industry, as well as in the context of large-scale development, distribution and use of clean energy, China is striving to promote a model based on the “smart electric network+ power transmission via 1000kv transmission lines of clean energy”.
In September 2015, Chinese President Xi Jinping, speaking at a UN meeting, said that China supports the construction of a global energy network, the promotion of clean and green energy to meet the corresponding needs in the world. In March 2016, the international organization for cooperation and cooperation in the creation of a global energy network – GEIDCO (Global Energy Interconnection Development and Cooperation Organization) was established, which became the first international energy organization created on the initiative of China.
According to the chairman of GEIDCO, Liu Zhenya, the world has rich resources of clean energy, but their distribution is uneven. Currently, 85% of the clean energy resources in Eurasia and Africa are concentrated in the territory that stretches from North Africa through Central Asia to the Russian Far East. The distance between the areas that are rich in clean energy sources and the areas that need them is several thousand kilometers. This requires the transformation of clean energy sources into electricity for long-distance transmission and large-scale placement.
In 2014 and 2015, the State Electric Grid Corporation of China won a tender for the construction of the first and second stages of a project for the transmission of direct current with a high voltage of ±800 kilovolts in the mountains of Brazil. At the same time, the corporation, together with Kazakhstan, Russia and Mongolia, is conducting an analysis of the feasibility of interrelated high-voltage projects. The South China Electric Grid Company (China Southern Power Grid Company Limited) has at its disposal 12 cross-border network lines that connect China with Laos, Myanmar and Vietnam. The total volume of electricity exchange with neighboring countries reaches 47.124 billion kWh.
The global energy network not only converts coal, oil, water, wind and sunlight into electricity and transports it over long distances, but also contributes to the optimized allocation of resources on a large scale. At the same time, it uses the difference in time zones, seasons and costs to implement the mutual complement of clean energy in different areas, as well as to maximize energy efficiency and efficiency.
In the future, the Arctic wind will “light” electric lamps in Beijing homes, and the equatorial sunlight will “give energy” to electric cars on the streets of Shenzhen.
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