Port low-voltage shore power management system and method based on Internet of Things

The invention relates to the technical field of port low-voltage shore power, in particular to a port low-voltage shore power management system and method based on the Internet of Things, and the system comprises the steps: collecting the power demands of berthing ships, obtaining the demand ratios, processing the demand ratios, obtaining a normal demand ratio set, and dividing the demand ratios according to grades; the method comprises the steps of collecting temperatures generated when low-voltage frequency conversion devices of all demand levels work, calculating threshold temperatures of all the demand levels, collecting duration for the low-voltage frequency conversion devices to reach the threshold temperatures, establishing a prediction model for the duration for the low-voltage frequency conversion devices of all the demand levels to reach the threshold temperatures, and collecting the power demand of a current ship in real time. And obtaining the demand level, inputting the power demand into the same