DC power supply and distribution system

A DC power supply and distribution system comprising:

• a plurality of distribution lines provided respectively corresponding to a plurality of loads;
• a first converter to convert a voltage supplied from a first power source into a plurality of DC voltages respectively corresponding to the plurality of loads and simultaneously output the plurality of DC voltages respectively to the plurality of distribution lines;
• a second converter to convert a power supplied from a second power source into a plurality of DC powers respectively corresponding to the plurality of loads and simultaneously output the plurality of DC powers respectively to the plurality of distribution lines;
• and
• a first controller to supply control signals to the second converter to control the plurality of DC powers output to the plurality of distribution lines such that efficiency of the first converter is increased, based on information related to efficiency of the second converter,
• wherein the DC power supply and distribution system further comprises a power detector to detect a power supplied from the first power source,
• wherein the first controller provides the control signals to the second converter to control a sum of the plurality of DC powers such that a power value detected by the power detector is smaller than a predetermined value, and
• the first controller:
• generates an output power target value having a magnitude corresponding to a deviation between the power value detected by the power detector and the predetermined value, and
• supplies the control signals to the second converter to control the plurality of DC powers such that the sum of the plurality of DC powers attains the output power target value and that the output power target value decreases.