By the end of 2019, there were more than 580 electrochemical energy storage power stations in China

Energy storage plays an important role in "improving quality and ensuring quantity" for a new generation of energy power systems, and is a necessary support for the large-scale application of renewable energy.

The random fluctuation of photovoltaic power generation and wind power generation brings great pressure to the frequency and voltage balance of the power system. Energy storage technology has the characteristics of sensitive response and adjustment, which can respond to the frequency and voltage adjustment requirements of the power system in real time and improve the power quality of the system. At present, power-type "quality-upgrading" energy storage projects have been demonstrated and commercialized around the world, and gradually participate in the auxiliary AGC frequency regulation of power systems, but the service life and performance of power-type energy storage battery systems still need to be greatly improved and improved.

New energy power generation also has the characteristics of anti-peak regulation, which also brings huge pressure to the capacity balance of source, network and load in the power system. In the future, with the rapid development of distributed photovoltaic and electric vehicle industries, the uncertainty of electricity load will gradually increase, and the load peak-to-valley difference will also increase. The energy storage system can play the "storage/discharge" function of peak shaving and valley filling to ensure the staggered balance of power system capacity requirements. At present, the capacity-based "capacity-guaranteed" energy storage projects have not been applied on a large scale. develop. In addition, it is also necessary to consider the resource supply and recovery of the entire industry chain, because the development of renewable energy requires the support of renewable energy storage.

Therefore, the cost and environmental protection of energy storage are major challenges facing the world today. It is necessary to build a market-oriented green energy storage technology innovation system, and develop different energy storage technologies for specific application scenarios, from materials, devices, systems and Collaborative innovation at multiple levels such as application, reduce energy storage costs by more than half through disruptive technology development, improve the performance of electrochemical energy storage systems to a fully controllable level, and need to consider environmental loads and resource regeneration The whole industry chain design and application .

In order to promote the healthy and sustainable development of energy storage technology and industry, my country has always adhered to the direction of market-oriented development, actively introduced industrial policies, and promoted market-oriented reforms. In 2017, the National Energy Administration of China and relevant departments jointly issued the "Guiding Opinions on Promoting Energy Storage Technology and Industrial Development" to encourage energy storage technology research and development, carry out project demonstrations, and began to establish and improve the market mechanism for energy storage to participate in electric auxiliary services. . Under the guidance of policies, China's energy storage technology and industry are developing steadily. As of the end of 2019, China's cumulative installed capacity of energy storage exceeded 32GW, ranking among the top in the world. Among them, there were more than 580 electrochemical energy storage power stations.

Technological innovation in China's energy storage field is active, and the number of patent applications is increasing year by year, and a few original technologies have achieved breakthroughs. In the future, it is also necessary to strengthen the establishment of a market application-oriented green energy storage technology research and development system and a talent training system. With a good market-oriented environment, in response to the "stuck neck" problem of large capacity, low cost, and easy recycling, actively promote energy storage technology. Innovation, reduce the cost of energy storage application, promote the development of energy storage technology and industry, and help the global energy clean transformation.