Patent ID: 11901807
Assignee: KABUSHIKI KAISHA TOSHIBA
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. A power system control method comprising:
controlling a switch, the switch shorting-circuit between a first power conversion apparatus and a power storage apparatus, the switch being connected in parallel to a second power conversion apparatus,
the first power conversion apparatus converting power which is generated from natural energy and converted by a third power conversion apparatus connected in an input-side of the first power conversion apparatus and outputting the converted power to a power distribution grid, and a contact point between the switch and the first power conversion apparatus being connected to the power distribution grid via the first power conversion apparatus,
the second power conversion apparatus converting surplus power that has not been converted by the first power conversion apparatus and charging the power storage apparatus with the converted power, or converting power discharged from the power storage apparatus and supplying the converted power to the first power conversion apparatus;

controlling opening and closing of the switch;
controlling the switch based on a voltage that is output by the first power conversion apparatus;
controlling the switch based on a difference between the voltage that is output by the first power conversion apparatus and a first voltage; and
controlling the switch based on a frequency of power that is output by the first power conversion apparatus.