Power supply management system for multi-port machine

The conventional power supply management system for the multi-port machine adopts a centralized management technology; each load port power supply is supplied by a single tree-form distribution network; overvoltage protection and overcurrent protection measures and the like are adopted; however, the requirements of high reliability and intelligentizing of important equipment in the industrial environment cannot be satisfied by the single power supply management technology; and the green and energy saving targets cannot be realized easily. The invention provides a power supply management system for the multi-port machine. The power supply management system adopts an annular redundant structure based on a distributed management technology; the power supply management system adopts the overvoltage protection and overcurrent protection measures; besides, protection of reverse connection, power-off monitoring, load monitoring for each load port and the independent energy saving control function are adopted by the