Energy Storage Science and Technology ›› 2020, Vol. 9 ›› Issue (5): 1562-1565.doi: 10.19799/j.cnki.2095-4239.2020.0252

• Energy Storage System and Engineering • Previous Articles     Next Articles

Demand analysis of large scale energy storage in Chinas power system

Zheyi PEI1(), Gaofeng FAN1(), Xiaohui QIN2   

  1. 1.State Grid Corporation of China, Beijing 100031, China
    2.China Electric Power Research Institute, Beijing 100192, China
  • Received:2020-07-22 Revised:2020-08-14 Online:2020-09-05 Published:2020-09-08
  • Contact: Gaofeng FAN E-mail:pei-zheyi@sgcc.com.cn;fan-gaofeng@sgcc.com.cn

Abstract:

China is speeding up the construction of a clean, low-carbon, safe and efficient energy system. The remarkable feature is to promote the rapid development of new energy installation. However, with the continuous increase of new energy installation, the random fluctuation of its output has brought huge peak regulation pressure to the power balance, and has become the main factor restricting the high proportion of new energy consumption. At the same time, due to the weak support of power electronic equipment of new energy, the security and stability of high proportion of new energy power system is also facing great challenges. Combined with the characteristics of new energy distribution, as well as the regulation demand brought by its rapid growth, this paper puts forward the analysis principle of enhancing power system regulation capacity and allocating energy storage; Combined with the safe operation requirements of UHV power grid, the role of energy storage in improving the security of UHV power grid is analyzed. The GW level energy storage is configured in the receiving end power grid to participate in the power grid frequency safety control, which can effectively reduce the impact of power imbalance, reduce the amplitude of system frequency drop, improve the frequency recovery characteristics, and ensure the frequency stability of the system. Comprehensive analysis shows that promoting the application of GW level electrochemical energy storage and building a more flexible and efficient power system can not only effectively promote the healthy development and efficient utilization of new energy, but also effectively guarantee the safe and stable operation of the power system with high proportion of new energy and high proportion of power electronic equipment. The pilot application of electrochemical energy storage in power system has gained a lot of experience, which lays a good foundation for the next large-scale application.

Key words: new energy, electrochemical energy storage, stability

CLC Number: