| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power distribution system capable of preventing the lifetime of each electric apparatus from being shortened and preventing loss due to power conversion. <P>SOLUTION: A DC apparatus 102 connected to a DC power feeding line Wdc and constituting an illumination system K102 or a home alarm system K104 detects its own power reception voltage, transmits the detected power reception voltage together with apparatus identification information of its own to a DC power feeding section 101, and the DC power feeding section 101 acquires the apparatus identification information and the power reception voltage from each DC apparatus 102. The DC power feeding section 101 which has received the power reception voltage calculates a voltage drop value for each DC apparatus 102 by subtracting the power reception voltage from a set voltage. The DC power feeding section 101 which has calculated the voltage drop values of all the DC apparatuses 102 estimates a DC apparatus 102 having the maximum voltage drop value as a the DC apparatus 102 which is the furthest from its own apparatus, compares the voltage drop value of the furthest DC apparatus 102 with a threshold value, and estimates the residual usable power in the DC power feeding lines Wdc if the voltage drop value is smaller than the threshold value. <P>COPYRIGHT: (C)2009,JPO&INPIT |
