The first international set! 100 MW advanced compressed air energy storage power station connected to grid
The world's first 100 MW advanced compressed air energy storage demonstration power station. Photo courtesy of the Institute of Engineering Thermophysics, Chinese Academy of Sciences
The world's first 100 MW advanced compressed air energy storage demonstration power station. Photo courtesy of the Institute of Engineering Thermophysics, Chinese Academy of Sciences
At 17:00 on September 30, the world's first 100-megawatt advanced compressed air energy storage national demonstration project was successfully connected to the grid for power generation in Zhangjiakou, Hebei.
The total scale of the project is 100 MW/400 MWh, and the core equipment autonomy rate is 100%. It can generate more than 132 million kWh of electricity every year. It can provide power protection for about 50,000 users during peak power consumption, and can save standard coal every year. 42,000 tons, reducing carbon dioxide emissions by 109,000 tons. It is a new type of compressed air energy storage power station with the largest single-machine scale and the highest efficiency in the world.
The technology of the demonstration project is provided by the Institute of Engineering Thermophysics, Chinese Academy of Sciences (hereinafter referred to as the Institute of Engineering Thermophysics), the investor is Giant Group Zhangbei Giant Energy Co., Ltd., and the equipment provider is China Reserve National Energy (Beijing) Technology Co., Ltd. The project will start construction in October 2020, complete equipment installation and system integration in December 2021, and start live commissioning.
Xu Yujie, a researcher at the Institute of Engineering Thermophysics and director of the Energy Storage R&D Center, told the China Science Journal that energy storage technology is the key supporting technology to achieve the goal of "carbon peaking and carbon neutrality". Advanced compressed air energy storage technology has large scale and high cost. It is a long-term and large-scale energy storage technology with great development potential, which can realize peak regulation, frequency regulation, and regulation of power system. Phase, spinning reserve, black start, etc., have broad development space and strong competitiveness in improving power system efficiency, safety and economy.
The reporter learned that traditional compressed air energy storage mainly uses low-valley and low-quality electricity to compress and store air in large gas storage caves; during peak electricity consumption, high-pressure air is released from the gas storage caves, and the same fuel is burned to drive turbines to generate electricity. , has been commercially used in Germany and the United States. However, there are three main technical bottlenecks in traditional compressed air energy storage: first, relying on fossil fuels to provide heat sources; second, relying on natural gas storage caves, such as rock caves, salt caves, abandoned mines, etc.; third, the system is inefficient and needs to be further improve.
In recent years, in response to the bottleneck of traditional compressed air energy storage technology, countries have actively developed new compressed air energy storage technologies, including regenerative compressed air energy storage systems, isothermal compressed air energy storage systems, and liquefied air energy storage systems. The Institute of Engineering Thermophysics has been focusing on the research and development of compressed air energy storage technology since 2004. In 2009, it originally proposed a new principle of advanced compressed air energy storage technology. Since 2013, from 1.5 MW, 10 MW to 100 MW, basic theories such as system process coupling and dynamic optimization have been developed, and key technologies such as multi-stage compressors and expanders, and high-efficiency and compact heat storage heat exchangers have been broken through. As well as system integration and control technology, an engineering demonstration has been completed.
Xu Yujie introduced that after the completion of Zhangjiakou International's first 100-megawatt advanced compressed air energy storage national demonstration project, a new model of large-scale energy storage system operation and a strategic emerging industry cluster will be formed, which will effectively promote the scale and industrialization of my country's compressed air energy storage technology. The development process of commercialization is of milestone significance for promoting the energy revolution and building a new power system.
The above-mentioned related work has been supported by the Chinese Academy of Sciences’ Class A pilot project “Key Technologies and Demonstration of Transformative Clean Energy”, the National Development and Reform Commission National Renewable Energy Demonstration Zone Major Project, and the National Science Fund for Distinguished Young Scholars.