Network-based power supply system

A powered device powered based on a network, wherein the powered device receives electric energy over the network, and the powered device comprises:

• a detector, wherein the detector is configured to detect, based on a voltage signal and a current signal that are received from the network, whether power overload protection is triggered;
• a plurality of power modules;
• and
• a controller, wherein
• the controller is configured to:
• in response to detecting, by the detector, that the power overload protection is not triggered, start the plurality of power modules one by one in a specific order until either all the plurality of power modules are started or the detector detects that the power overload protection is triggered after a specific power module of the plurality of power modules is started;
• in response to detecting, by the detector, that the power overload protection is triggered, select, according to the specific order and based on the specific power module, one or more of the plurality of power modules as a power module combination of the powered device;
• and
• determine a load power of the powered device based on the power module combination.

A network-based power supply system, wherein the network-based power supply system comprises a power sourcing equipment, and the network-based power supply system determines a power consumption level of a powered device based on a load power of the powered device, wherein the powered device receives electric energy over a network, and the powered device comprises:

• a detector, wherein the detector is configured to detect, based on a voltage signal and a current signal that are received from the network, whether power overload protection is triggered;
• a plurality of power modules;
• and
• a controller, wherein
• the controller is configured to:
• in response to detecting, by the detector, that the power overload protection is not triggered, start the plurality of power modules one by one in a specific order until either all the plurality of power modules are started or the detector detects that the power overload protection is triggered after a specific power module is started;
• in response to detecting, by the detector, that the power overload protection is triggered, select, according to the specific order and based on the specific power module, one or more of the plurality of power modules as a power module combination of the powered device;
• and
• determine a load power of the powered device based on the power module combination.