The traditional power system is a continuous operation system that integrates power production, transmission, distribution, and consumption. The application of energy storage adds a link to store electrical energy to the traditional power system, transforming the power system from a “rigid” system to a “flexible” system, greatly improving the safety, flexibility, and reliability of the power system [1–3]. Especially, facing the inherent needs of the development of renewable energy scale integration and consumption, smart grid and energy internet, energy storage is given a “cornerstone” role positioning.