| 摘要 |
PROBLEM TO BE SOLVED: To provide a parallel-off control device capable of performing parallel-off of a distributed power source and a commercial power supply system during single operation without affecting detection of single operation in another distributed power supply system.SOLUTION: The parallel-off control device includes: a single operation determination part 27 for determining occurrence of single operation of a distributed power supply system 1 which is operated while being interconnected with a commercial power supply system 11; a phase detection part 26 for detecting a phase of an AC voltage of the commercial power supply system 11; a delay part 28 in which, when it is determined by the single operation determination part 27 that the single operation occurs, while defining the phase of the AC voltage at the time of the determination as a reference, a delay signal is generated that is delayed by a half cycle of the phase or more; and an instruction part 29 in which, when the delay signal is received, a parallel-off signal instructing the parallel-off of the commercial power supply system and the distributed power supply system is generated. |
