Solar and Wind Power Generation in China

Solar and Wind Power Generation in China


Since 2000, many large-scale solar power stations and wind power stations have been built in China due to great support for new energy. Whether these projects are invested and constructed by the state or private business, they all have two common features. They are all synchronized and connected to the national grid and they all use energy trading as the main or only profit. Through the state's vigorous support stage, it will mainly increase the infrastructure construction of the national new energy power station, and secondly promote people's direct understanding of new energy. This stage can be called the new energy support development stage.
 
Secondly, after the 531 policy in 2018, after China canceled the subsidy policy for photovoltaics, subsidies for wind power generation and battery energy storage were reduced or canceled. Many companies that directly obtain state new energy subsidies deeply feel the cruelty of the 531 policy, and many companies developed in large scale and radical development have gone bankrupt one after another. Later, with the reduction in the price of new energy products, new energy has been well developed in many rigid-demand fields. With the transition in 2018 and 2019, it can be said that 2020 is now in the application and development stage of the new energy. At present, many new energy projects or products are directly aimed at providing power services, which is the initial stage of direct application.
 
Solar power generation is a clean, sustainable and highly efficient way of generating electricity. However, the sunlight that hits the earth's surface is generally only about 70% of that outside the atmosphere due to the influence of the earth's surface by the atmosphere and weather conditions. If a power station is built in space outside the earth's atmosphere, the power generation efficiency will be much higher than that on the earth, and it will not be affected by the alternation of day and night on the earth's surface, weather conditions, and the latitude of the earth, and it can always be in a state of power generation.
 
One problem with this technology is how to transmit the electrical energy generated in space to the earth, because space is still hundreds or tens of thousands of kilometers away from the earth's surface, and humans are still unable to pull metal transmission lines from space to the earth's surface. Therefore, it is generally believed that space solar power generation is only a science fiction thing. However, what many friends may not have thought is that such a power station has already been built in Bishan District, Chongqing City, China.
 
According to the "Chongqing Daily" report on June 18, China's first space solar power station experimental base officially started construction in Bishan District, Chongqing City. The project has a total investment of about 2.6 billion RMB; the first batch of construction funds is 100 million RMB. The core experimental construction area is about 22000 square meters, and the space solar power station experimental science comprehensive building and test platform will be built; facilities such as the launch test site and the balloon platform debugging site will be built on another experimental area with 70667 square meters. The peripheral construction area covers an area of ‚Äč‚Äčabout 111333 square meters, mainly building a space breeding area and a science and education center.
 
The space solar power station in Chongqing
 
After completion, it will become China's first large-scale comprehensive experimental base integrating space solar technology testing, key research and new industry cultivation. It will focus on the preliminary demonstration, simulation, verification and application work, which will have great significance for China to change the traditional energy transmission mode and solve the problems of energy supply in the future.
 
The space solar power station is to establish a solar energy collection and conversion station on the space orbit outside the earth's atmosphere. After collecting the solar energy, it transmits the energy back to the ground collection station through wireless energy transmissions such as microwaves and laser; the collection station converts it into electrical energy and outputs it to the outside, and you can continue to supply power.
 
Bishan Chongqing is also building the world's first space solar power station, which will become the first real space power station for mankind after completion. Many friends may not believe this. In fact, Chongqing City has already started the layout in this area. In 2018, related units such as Chongqing University, China Academy of Space Technology Xi'an Branch and the University of Electronic Science and Technology jointly built the experimental base of the Mountain Space Solar Power Station. The person in charge is Academician Shizhong Yang of the Chinese Academy of Engineering.
 
The space solar power station planned to be built at the base will be arranged in space 36,000 kilometers from the ground, and will not be affected by natural factors such as the earth's day and night, weather, regional latitude, etc. The data shows that one square meter of photovoltaic cells can generate 10 to 14 Kilowatts of electricity, and the same area of solar panels will generate electricity dozens of times that of the ground, so only 2 million square meters of photovoltaic panels are required, which is equivalent to the installed capacity of the Three Gorges Power Station. The space solar power station is also called the "Three Gorges in Space". In fact, solar panels with 2 million square meters only have an area of two square kilometers. It is not impossible to build it.
 
According to Academician Yang Shizhong's plan, the space solar power station experimental base and R&D platform will be built around 2020. Although some time has been delayed due to the epidemic, this step is currently underway; the second step is to realize small and medium-scale solar power plants around 2025. The stratospheric solar power plant is connected to the grid for power generation. The stratosphere is located at an altitude of 10 kilometers to 50 kilometers above the troposphere, so it will not be affected by the surface weather; the third step is to carry out system application of the power station for large-scale space solar energy after 2025. The construction of China’s Three Gorges in Space is already in progress, and the space power station will also run along with the earth in the near future.
 
Many friends may wonder how the electricity generated by solar panels in space is transmitted to the earth. Academician Shizhong Yang also answered this. The electric energy of the space solar power station is mainly transmitted through wireless transmission such as microwaves, which is equivalent to pulling a transmission line from space to the ground. Targeted power supply or mobile power supply in disaster-stricken areas can solve the problems of power generation and power supply in some areas.