Abstract: The emergency power system is widely used as an AC backup power source for various kinds of first-class and especially important power load. Meanwhile, the wind-solar hybrid power system is the best configuration for energy use and the mode with energy storage has the best advantages in the future. A smart emergency power system with wind-solar storage is developed and an emergency power system of wind-solar hybrid with energy storage is studied by using the static transfer switch as a switch equipment to realize. This equipment can control charge and discharge process of energy storage and intelligently judge the output signal to switch rapidly.

Key words: emergency power system, wind-solar hybrid, energy storage, static transfer switch