Patent ID: 11923789
Assignee: TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS, CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 6:
7. The power converter according to claim 1, further comprising:
a switchgear placed between the inverter and the power grid;
a first voltage detector placed between the inverter and the switchgear and configured to detect a first voltage value of the AC power converted by the inverter; and
a second voltage detector placed between the switchgear and the power grid and configured to detect a second volatge value of the AC power from the power grid,
wherein the controller,
when it is detected that the anomaly occurs in the power grid based on the second voltage value, opens the switchgear and switches an operation mode from the interconnected operation mode to the isolated operation mode, and
when it is detected that the power grid is recovered from the anomaly based on the second volatge value, detects the frequency difference and the phase difference between the AC power from the inverter and the AC power from the power grid using the first voltage value and the second voltage value.