Wang Ruixiang, president of China Machinery Industry Federation, delivered a speech at the China International Energy Summit and Exhibition on July 26: "With the deepening of science and technology and industrial transformation, energy technology innovation and innovation in energy consumption mode lead energy transformation, Energy Internet technology and micro-energy network are in the ascendant, reflecting the direct integration and development of information technology, intelligent technology and traditional energy technology, and is an important technical support for the market-oriented development of the energy industry."
(This article reprinted from: Energy Magazine Author: Wang Xiaoyun)
Global Energy Internet Blueprint
According to a recent report jointly released by the International Energy Agency and other agencies, China's contribution to global energy consumption is over 35%. At present, global energy is dominated by clean energy, electricity is the center, interconnected, and a shared modern energy system is built, representing the trend and direction of world energy development.
Shen Hong, director of the Global Energy Internet Development Cooperation Organization, said: "Building a global energy interconnection is conducive to the efficient development, deployment and utilization of clean energy."
What is the Global Energy Internet? Shen Hong proposed: “The global energy Internet is smart grid + UHV grid + clean energy.†Clean energy development is the core goal; the development of UHV technology provides the possibility to build a global clean energy Internet platform, only through UHV The power grid can realize large-scale and long-distance clean energy transportation; the smart grid can effectively solve the problem of clean energy consumption.
According to the Global Energy Internet Development Cooperation, the future clean energy ratio will increase from 22.8% in 2016 to 71.6% in 2050. The global power generation capacity will increase from 6.17 billion kilowatts in 2016 to 266.7 billion kilowatts, of which clean energy generation Installed and power generation will account for more than 80% of the world's total installed capacity and total power generation, and electricity will become the dominant energy source. On this basis, the organization also proposed future global power supply installation forecast, reaching 26.7 billion kilowatts by 2050 and 31.9 billion kilowatts by 2070. Global clean energy installed capacity surpassed fossil energy by 2030, and reached 83% in 2050. In 2070, it further increased to 92%.
At the meeting, the reporter learned that the global energy Internet has three characteristics. First, high, the proportion of clean energy is extremely high, it is expected to reach more than 90% in 2070; the second is large, covering all continents; the third is far, referring to the long distance of transportation.
In the future, the global energy Internet will form a nine-in-one and nine-horizon energy channel, extensively interconnected clean energy bases and load centers, achieving global deployment of clean energy, and large-scale mutual assistance across time zones and across seasons.
Including global large-scale solar power generation base, wind power base, and hydropower base. Among them, the world's large-scale solar power infrastructure is mainly distributed in North Africa, West Asia, Central Asia, Western China, the western United States, Mexico, Chile and Australia; wind power is mainly in the Arctic Greenland, Sakhalin Island, and western China, Europe The North Sea, the central United States; and the planning of hydropower bases, mainly distributed in China's Jinsha River, Yarlung Zangbo River and other basins, Southeast Asia Mekong River, Irrawaddy River, South America's Amazon drinking basin, Sweden, Finland and so on.
Key technology innovation needs
The global energy Internet mainly promotes clean energy, while clean energy has the characteristics of volatility and intermittentness, which requires innovation in key technologies. At the meeting, Shen Hong made the following summary of the key technologies needed to promote the global energy Internet:
The first is grid-friendly technology for large renewable energy bases. The goal is to make clean energy have external characteristics similar to conventional energy sources, and to be controllable, measurable, and feasible, so that it can maintain the original stability of the grid with a high proportion of intervention in the grid.
Followed by a wide range of network, source, Dutch, and storage complementary technologies. According to the data, China has started research. In the past, Qinghai has achieved 100% clean energy supply for one week. On a global scale, it puts higher demands on larger networks, sources, Dutch and storage.
The third is large-scale energy storage technology. As an alternative and regulatory resource, energy storage provides the necessary conditions for global energy Internet clean energy access.
The fourth is photovoltaic thermal combined power generation technology. In the future, global energy Internet wind power, photovoltaics, large-scale access, we need to improve the power grid. At present, one of the problems is that the scale of light and heat is small. Due to temperature problems, it is impossible to achieve ultra-high-critical technology. One is that the cost of light and heat is relatively high.
The fifth is the UHV flexible DC grid technology. In the clean energy-rich areas, the grid conditions are relatively weak, and conventional DC transportation cannot meet the requirements of grid distribution. UHV flexible DC will become the technology needed for the global energy Internet in the future.
The sixth is the UHV submarine DC cable technology. Many of the planned global energy Internets are cross-sea, such as access to the Mediterranean, China, Japan, Korea, Indonesia, Southeast Asia and Australia, the Caribbean, and so on. From the current situation, the submarine cable can achieve 600 lurking and the transmission capacity to 2 million. This is still different from the global energy Internet scale. In the future, we need to develop a large capacity of plus or minus 800 to plus or minus 1000. Cable.
The seventh is superconducting direct current transmission technology. In some areas, if the use of ultra-large DC transmission technology can play a better role, but the current status of superconducting DC research is not very satisfactory, can not reach the stage of engineering.
The eighth is the regulation technology of large power grids. At present, the State Grid Corporation has carried out a lot of research on the coordinated control of the large power grid, and has achieved fruitful results. However, it is not yet known for the larger-scale power grid. It is still unknown, so the future will be for large-scale renewable cleaning. Energy collection, long-distance transmission, and grid configuration all require large-scale grid control technology.
The ninth is the AC/DC hybrid power grid stability control technology. Stable control technology is an important part of the global energy Internet work.
The tenth is the broadband oscillation suppression technology.
Eleven is the electric energy replacement technology. Including electric heating, geothermal pumps, industrial electric boilers, electric vehicles, etc., aiming to increase the proportion of electric energy consumption in the terminal, the future is also urgently needed.
Twelve is power electronics technology. This is a strategic technology that plays an important supporting role in the high-power electronicization of the power grid. The future development trend is to develop in a more compact and denser direction.
Thirteen is artificial intelligence cognitive technology. A high proportion of clean energy access will inevitably lead to very complex changes in the operational characteristics of the grid, and artificial intelligence cognitive technology can improve the ability to control large-scale global energy Internet.
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