Three-phase intelligent air switch open-phase protection method and system

The invention discloses a three-phase intelligent air switch open-phase protection method and system, and the method comprises the following steps: S1, when a three-phase circuit where an air switch is located is normal, an energy storage module carries out the energy storage action, and the electric quantity in the energy storage module supports the execution of preset actions after all modules are powered off; s2, when the power taking phase of each module is abnormal, judging an abnormal state through a software algorithm and a circuit design scheme, and switching power supply in real time; s3, by using the function of the energy storage module, supporting each module to complete early warning action, automatically protecting load equipment and knowing the field condition; and S4, after the circuit returns to normal, the energy storage module performs the energy storage action again so as to deal with the next abnormity. Functions are performed through the energy storage module to complete actions such as