| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a DC power feeding system in which a voltage of a DC bus bar can be maintained using a power storage device even at both normal power supply and power failure of a commercial power system. <P>SOLUTION: By a control means 14, the operation of a rectifier 2 is controlled so that the voltage of the DC bus bar 4 becomes a reference voltage in system linkage when the voltage of the commercial power system 3 satisfies a normal operation condition, the power storage device 1 is charged and operated when the voltage of the DC bus bar 4 is equal to or more than an upper limit voltage in the system linkage which is higher than the reference voltage in the system linkage, and the power storage device 1 is discharged and operated when the voltage of the DC bus bar 4 is equal to or less than a lower limit voltage in the system linkage which is lower than the reference voltage in the system linkage. At the same time, the operation of the rectifier 2 is stopped when the voltage of the commercial power system 3 does not satisfy a predetermined normal operation condition, the power storage device 1 is charged and operated when the voltage of the DC bus bar 4 is higher than the reference voltage in independent operation, and the power storage device 1 is discharged and operated when the voltage of the DC bus bar 4 is lower than the reference voltage in the independent operation. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
