Through virtual power plants, the integration of distributed energy such as renewable energy, energy storage equipment, and backup power has become a new science in energy management. As the proportion of renewable energy gradually increases, to solve the problem of intermittent power supply, flow batteries that can store electricity for a long time have attracted much attention.

Uninterruptible Power Supply (UPS) is a device that continuously provides backup AC power for electrical load devices and maintains the normal operation of electrical appliances when the power grid is abnormal. Uninterruptible power supply systems can be divided into online, offline, and line interactive. The power requirements of each field are different. How to choose a suitable one?