A DC 220 V battery pack broke down during the switching of the power supply in a power plant
meanwhile the interlock start of diesel generator was not successful. It resulted in a series of abnormal events such as abnormal DC system
UPS system power failure
DCS system power failure
tripping occurred after the successful start of each DC lube oil pump and so on. This paper analyzes the influence of the failure of the DC 220 V battery pack and the failure of the diesel generator to other systems and equipment
and puts forward corresponding treatments and suggestions.