Patent ID: 11909201
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 3:
4. The multi-terminal DC power transmission system according to claim 2, wherein
among the protection zones, a first protection zone includes a first DC bus,
the first DC bus is connected to a plurality of DC transmission lines included in a plurality of protection zones adjacent to the first protection zone,
a first individual protective device provided corresponding to the first protection zone is configured, when detecting faulty current flowing in any of the DC transmission lines, to further detect a direction in which the faulty current flows and transmit the fault signal including information on the direction in which faulty current flows to the common control device, and
the common control device is configured to estimate a fault occurrence zone where a fault occurs among the protection zones, based on the timestamp and the information on the direction in which faulty current flows.