Wang Ruixiang, President of China Machinery Industry Federation, delivered a speech at China International Energy Summit and exhibition “With the in-depth promotion of science, technology and industrial reform, energy science and technology innovation and energy consumption mode innovation lead energy transformation. Energy Internet technology and micro energy network are in the ascendant, which reflects the direct integrated development of information technology, intelligent technology and traditional energy technology, and is an important technical support for the market-oriented development of energy industry.”

Analysis on the development trend and direction of global energy Internet


Global energy Internet blueprint

According to the latest report jointly released by the International Energy Agency and other agencies, China’s contribution to global energy consumption reduction is more than 35%. At present, the global energy is a modern energy system dominated by clean energy, centered on electricity, interconnected and shared, which represents 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, allocation and utilization of clean energy.”

What is the global energy Internet? Shen Hong put forward: “the global energy Internet is smart grid + UHV grid + clean energy”, in which clean energy development is the core goal; The development of UHV technology provides the possibility of building a global clean energy Internet platform. Only through UHV power grid can large-scale and long-distance clean energy transmission be realized; Smart grid can effectively solve the problem of clean energy consumption.

According to the prediction of the global energy Internet development cooperation organization, in the future, the proportion of clean energy will increase from 22.8% in 2016 to 71.6% in 2050, and the global power generation installed capacity will increase from 6.17 billion kw in 2016 to 266.7 billion kw, of which the proportion of clean energy power generation installed capacity and power generation will exceed 80% of the global total installed capacity and power generation, and electricity will become the leading energy at the terminal. On this basis, the organization also put forward the forecast of global power installation in the future. It is expected to reach 26.7 billion kw by 2050 and 31.9 billion kw by 2070. The proportion of global clean energy installation will exceed that of fossil energy before 2030, reach 83% in 2050 and further increase to 92% in 2070.

At the meeting, the reporter learned that the global energy Internet has three characteristics. First, the proportion of clean energy is very high, which is expected to reach more than 90% in 2070; Second, it is large, covering all continents of the world; The third is far, which refers to the long conveying distance.

In the future, the global energy Internet will form a nine vertical and nine horizontal energy channel, widely interconnect clean energy bases and load centers, realize the global allocation of clean energy, and provide large-scale mutual assistance across time zones and seasons.

Including global large-scale solar power generation base, wind power base and hydropower base. Among them, the global large-scale solar power generation infrastructure is mainly distributed in North Africa, West Asia, Central Asia, Western China, western United States, Mexico, Chile and Australia; Wind power is mainly in Greenland and Sakhalin in the Arctic, Western China, the North Sea in Europe and the central United States; There is also the planning of hydropower bases, which are mainly distributed in the Jinsha River, Yarlung Zangbo River and other basins in China, the Mekong River and Irrawaddy River in Southeast Asia, the Amazon River Basin in South America, Sweden, Finland and so on.

Key technology innovation needs

The global energy Internet mainly promotes clean energy, which has the characteristics of volatility and intermittence, which requires innovation in key technologies. At the meeting, Shen Hong summarized the recent key technologies that need innovation to promote the global energy Internet as follows:

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, controllable, measurable and feasible, so that it can maintain the original stability of the power grid when it is involved in the power grid in a high proportion.

The second is the complementary technology of large-scale network, source, load and storage. According to the data, research has been carried out in China. Some time ago, Qinghai realized 100% clean energy power supply for a week. Globally, it puts forward higher requirements for larger networks, sources, loads and storage.

The third is large-scale energy storage technology. As an alternative and regulatory resource, energy storage provides necessary conditions for clean energy access to the global energy Internet.

The fourth is photovoltaic solar thermal combined power generation technology. In the future, a large proportion of wind power and photovoltaic power will be connected to the global energy Internet. We need to improve the power consumption of the power grid. At present, one of the problems is that the scale of photothermal is small. Due to the problem of temperature, it is impossible to achieve ultra-high critical technology, and the other is that the cost of photothermal is relatively high.

The fifth is UHV flexible DC power grid technology. The power grid conditions in clean energy rich areas are relatively weak, and conventional DC transmission can not meet the requirements of power grid distribution. UHV flexible DC will become the technology needed by the global energy Internet in the future.

The sixth is UHV submarine DC cable technology. Many of the planned global energy Internet are cross sea, such as the access of the Mediterranean, China, Japan, South Korea, Indonesia, Southeast Asia and Australia, and the Caribbean. Judging from the current situation, submarine cables can achieve 600 latency and transport capacity to 2 million, which is still a gap with the demand for the scale of the global energy Internet. In the future, we need to further develop super large capacity cables ranging from plus or minus 800 to plus or minus 1000 latency.

The seventh is superconducting DC transmission technology. In some areas, if the ultra large DC transmission technology can play a better role, but the current research status of superconducting DC is not very ideal and can not reach the stage of engineering.

The eighth is the regulation technology of large power grid. At present, the State Grid Corporation of China has carried out a lot of research on the coordinated control of large-scale power grid and achieved fruitful results. However, it is still unknown whether the larger-scale power grid has the regulation ability. Therefore, large-scale power grid control technology is required for large-scale renewable clean energy collection, long-distance transmission and power grid configuration in the future.

The ninth is the stability control technology of AC / DC hybrid power grid. Stability control technology is an important part of the global energy Internet.

The tenth is broadband oscillation suppression technology.

11. Electric energy substitution technology. Including electric heating, geothermal pump, industrial electric boiler, electric vehicle and so on, which aims to improve the proportion of electric energy in terminal consumption. It is also urgently needed in the future.

Twelve is power electronics technology. This is a strategic technology, which plays an important supporting role in the high proportion of power electronization of the power grid. The future development trend is to be more compact and more dense.

Thirteen is artificial intelligence cognitive technology. A high proportion of clean energy access will inevitably lead to very complex changes in the operation characteristics of the power grid. The cognitive technology of artificial intelligence can improve the ability to control the large-scale global energy Internet.

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