China has the ability to take the lead in building a space solar power plant

"With the support of relevant departments, after more than ten years of continuous research on space solar power plants in China, we have greatly reduced the level with advanced countries in the world and entered the world's forefront." Professor Li Ming, Director of Science and Technology Committee of China Academy of Aerospace Technology Co., Ltd. 1 According to the reporter from the Daily Science and Technology Daily, "If we can maintain and further increase our research and development efforts, China is expected to become the first country in the world to build a solar power station with practical value."

Data Map: Space Solar Power Plant Schematic

Wang Li, a five-hospital researcher, said at the same time that not only do domestic experts have this confidence, but also in the international community that China has the ability and conditions to “lead” in this field.

Compared with fossil fuels, which are increasingly depleted and have serious environmental pollution problems, space solar energy is an efficient, long-lasting and clean energy source. Through a space solar power station operating in the universe, solar energy can be collected and converted on a large scale, and power can be transmitted wirelessly to the ground power grid with a power generation rate of 1 to 5 GW, which is equivalent to that of a surface nuclear power plant. Compared with solar power stations on the ground and wind power and hydropower, space solar power stations are not affected by natural factors such as day and night, weather, and regional latitude, and the power transmission is flexible. It can provide directional power or mobile power to remote areas, affected areas, and important facilities. To provide innovative solutions for improving the power energy structure and power supply, social benefits are extremely high.

The construction of a space solar power station is facing major technical challenges. It far exceeds existing space facilities in terms of weight and scale, and is known as the "Manhattan Project" in the aerospace and energy fields in the new era. Since the related concept was put forward in 1968, the U.S. government and enterprises have invested nearly 100 million U.S. dollars and have implemented a number of research and development plans. In 2004, Japan officially included the development of space solar power stations in the long-term planning of the national space industry as a long-term support for the three major space projects. One of the key areas; Russian aerospace companies are actively promoting cooperation with Chinese companies in space solar power plant projects; India, South Korea, and the European Space Agency are also conducting related research.

Since 2008, China has included the research and development of space solar power stations into the country's advanced research and planning. In recent years, space solar power station schemes such as non-light-concentrating platforms, secondary symmetric light-concentrating systems, multi-rotary joints, and ball-type energy collection arrays have been proposed, and important advances have been made in key technologies such as wireless energy transmission. At present, China has initially achieved the transition from "following" to "running" in the research of space solar power plants, and has become an important force in promoting the development of space solar power plants internationally.

Wang Li said that in addition to technology, the construction and operation of space solar power plants also require huge investments, broad markets, and environmental and policy factors. With comprehensive factors, countries have turned their attention to China and believe that China should play an important role in this field. Traction.

Being able to "lead" in the international arena is a rare opportunity for our country. "As far as the aerospace field is concerned, there are still large gaps in comparison with the international advanced level in manned spaceflight, deep space exploration, heavy-lift launch vehicles, and space stations." Wang Li said, "We want to build aerospace power, in addition to the above aspects. To narrow the gap, we should also look for other strategic commanding heights. The options are limited, but now there is such an opportunity in front of them."

He believes that China should not miss this opportunity. In a strategic sense, China’s environmental and energy problems are severe. If we can obtain rich and clean energy from space, such projects are worth trying. From the perspective of comprehensive benefits, the construction of space solar power plants brings tremendous traction to technological innovation and emerging industries. It is a super project that can take into account the needs of national security strategies and promote technological innovation.

According to China's relevant expert group's argumentation and suggestion, China should devote itself to completing the verification of space UHV power transmission and wireless energy transmission in the next 10 to 15 years. We will strive to achieve the mid-to-long-term goals of “building a megawatt-class space solar power plant by 2030 and building a capacity for a commercial-space solar power plant by 2050”. However, the above plan has not yet been approved by the state.

At the second technical seminar on space solar power station development held recently, the participating experts called for the hope that the country will expedite the establishment of a major scientific and technological special project for space solar power generation, and promote related technologies to achieve major breakthroughs at an early date. Wang Li said that at present, there are dozens of research institutes, universities and enterprises in China that are conducting research on key technologies such as ultra-high voltage power generation and transmission, efficient wireless energy transmission, and on-orbit assembly of super-large space structures. Due to the lack of guidance from major projects, The current research power and research objectives are relatively decentralized. It is necessary to adopt national projects, integrate relevant research, further clarify goals, accelerate the pace of R&D, and achieve a real “leadership” in the field of solar power plants.

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