POWER SUPPLY SYSTEM AND POWER SUPPLY MANAGEMENT DEVICE

摘要

A power supply system is provided with a sub-power supply device (10) intervening between a solar cell (11) and a power wire (70), and a power supply management device (20). The sub-power supply device (10) measures an output current value and an output voltage value of the solar cell (11). The sub-power supply device (10) outputs a direct current to the power wire (70) on the basis of the electric power obtained from the solar cell (11). The power supply management device (20) intermittently acquires the output current value and the output voltage value from the sub-power supply device. A maximum output voltage value (target voltage value) corresponding to the maximum output point of the solar cell is determined on the basis of the acquired output current value and the output voltage value. When the power supply management device (20) acquires the output voltage value from the sub-power supply device (10), the power supply management device (20) transmits a current command value which makes the output voltage value to the target voltage value, to the sub-power supply device. When the sub-power supply device (10) receives the current command value, the sub-power supply device (10) sets a value of the direct current to the received current command value.