Make clean and low-carbon energy "beautiful"

With the increasing proportion of renewable energy generation such as wind and light in the future, there is an urgent need to develop a new power system with new energy as the main body

Data show that the current carbon emissions of China's energy industry account for more than 80% of the national total, and the carbon emissions of the power industry account for more than 40% of the energy industry. It is estimated that by 2060, China's direct electricity consumption will account for 70% of the overall energy consumption, plus indirect electricity consumption, this proportion will reach 90%. To achieve the goal of "double carbon", energy is the main battlefield, electricity is the main force, and vigorously develop new energy sources such as wind and solar energy is the key. The construction of a new power system with new energy as the main body will help ensure the realization of carbon peak and carbon neutrality.

Clean energy, such as nuclear power, hydropower, wind power and photovoltaic, is mainly delivered to end users through the power grid. Du Xiangwan believes that the future energy transformation with new energy as the main body involves the energy system as a whole, and the power grid will play a key role in the consumption of the whole clean energy. Therefore, with the substantial increase in wind and photoelectric installed capacity, it is an urgent problem to be solved whether the output of high-quality power can meet the balance of supply and demand. The development of photovoltaic and wind power has subverted the development disadvantage of insufficient energy resource endowments in China in the past, and the endowment basis for the development of traditional power systems is undergoing great changes, and the planning of new power systems should conform to the development trend of The Times.

Tang Guangfu, academician of the Chinese Academy of Engineering and president of the Global Energy Internet Research Institute, said that from the energy supply side, nearly 70% of the energy in the future will be replaced by renewable energy, including clean energy such as hydropower, nuclear energy, wind energy, solar energy, and must be converted into electricity to be used. From the energy demand side, about 70% of the energy use scenarios will be electricity consumption, such as electric vehicles in the transportation industry. Therefore, the power system will play a central role in the energy transition. Considering the external dependence of China's oil and natural gas, as well as the international energy environment we are facing, we must vigorously play the central role of the power system in the energy transformation. The current power system is dominated by stable thermal power generation, and China has a good renewable energy resource endowment, which is suitable for vigorously developing a clean energy system dominated by photovoltaic and wind power. With the increasing proportion of renewable energy generation such as wind and light in the future, we urgently need to develop a new power system with new energy as the main body.

Li Liwu, academician of the Chinese Academy of Engineering and Chairman of the Expert Committee of China Southern Power Grid Corporation, believes that the design of the new power system needs to adapt to the dispersion of renewable energy resources such as wind and light, with random and intermittent characteristics. In the future, China's wind and photoelectric installed capacity is very large, and the power system will undergo fundamental changes. To construct a new power system with new energy as the main body, it is necessary to fully consider these characteristics of new energy.

What kind of technical path can be chosen for the construction of new power system? Tang Guangfu believes that the important characteristics of clean energy power generation represented by photovoltaic and wind power are volatility and intermittence, in order to vigorously develop clean and low-carbon energy, the new power system needs to adapt to the characteristics and requirements of a high proportion of clean energy power generation, and technically must highlight flexibility and flexibility. On the one hand, China's future energy system to clean energy as the main body, with flexible adjustment ability of coal power and gas power is an important means to compensate for wind power, photovoltaic intermittence, flexible power generation mode must need flexible power system as support; On the other hand, the flexibility of power system means to promote the wide application of flexible transmission mode represented by flexible DC. Compared to traditional methods, flexible DC technology is like a fully controllable pump, which can accurately control the direction, speed and flow of water. Through the flexible transformation of the power system, it makes the regulation more flexible, ensures the safe and stable operation of the grid, and is more suitable for large-scale access of clean energy.

We will support the development of clean energy with the strength of national strategic science and technology, and encourage the people to develop a lifestyle that meets the goal of "double carbon"