| 摘要 |
PROBLEM TO BE SOLVED: To obtain a distributed power supply system that detects a single operation speedily and reliably. SOLUTION: This power supply system is provided with a zero-phase detecting means 32 for a connected point voltage VAC, a frequency detecting means 33 of the connected point voltage, a storage means 31 which stores the latest frequency data, a data selecting means 34 which selects frequency data whose absolute values of the difference from a reference frequency is largest, and the older if there are a plurality of the maximum frequencies, from among the plurality of frequency data, an output frequency determining means 35 which determines the output frequency by adding on a shift value in the direction of stimulating the deviation, if the selected frequency data deviates from the reference frequency, a current outputting means 36 which starts by synchronizing the AC current output of the determined frequency with the zero-phase of a given order of a cycle of at least two cycles or more from one cycle, on which the latest frequency data stored in the storage means is based, and an independent operation detecting means 37 which judges the operation to be in an independent operation state, if the state that frequency deviates from the reference frequency by a given frequency or more satisfies the conditions for detecting the independent operation.
|
