Recently, one of Asia's largest flywheel energy storage vehicles appeared in China's ten art venues outside, attracted everyone's attention. This flywheel energy storage electric vehicle has a capacity of 1000 kVA and uses the most advanced mobile uninterrupted emergency power supply system in China. It stores mechanical energy in the form of rotating mass and can operate at 7700 rpm or more per minute. When the main power supply blackout, uninterruptible power supply UPS will be stored in the flywheel mechanical energy into electrical energy, and high-power diesel generator system organically integrated through the intelligent process control, to achieve seamless incision in milliseconds to take the loop Of the low-voltage load, and the flywheel energy storage flywheel unit has a one-way irreversible power supply to ensure that anti-power transmission does not occur. The power car has the advantages of fast power supply, good power supply, strong anti-shock load capability and high reliability, and has superior environmental adaptability. At the same time, when the utility vehicle detects that the mains power is restored, the flywheel unit will conduct a 2-minute mains power quality test. After detecting no problem, the flywheel energy storage power car will cut back the mains power supply to store energy. At this point, the generator set oil machine will maintain the hot standby state for 3-5 minutes to prevent the external power supply failure again, 3-5 minutes after the generator set to automatically stop running.