Patent ID: 11936307
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A power control system comprising:
a power converter of self-excited type including a first arm and a second arm each including one or more switching elements, the power converter performing power conversion between a DC system and an AC system;
an AC circuit breaker and a current control circuit connected in series on a path between the AC system and the power converter; and
the current control circuit including a current-limiting resistor and a disconnector connected in parallel,

a controller to instruct the disconnector to close after an initial charge of the power converter and open the AC circuit breaker when an impedance of a line between a first node located on a first end side of the current control circuit and a second node located on a second end side of the current control circuit is not less than a first threshold and an accumulated value of a current flowing through the current control circuit within a certain period of time is not less than a second threshold.