Method and controller for controlling a power transmission network

A method for controlling an arrangement of components in a power transmission network, the arrangement of components comprising a power converter, a main circuit breaker, a pre-insertion resistor, a PIR, and a PIR bypass switch, wherein the PIR is configured to limit a current flowing through the power converter, the PIR bypass switch is configured to selectively insert or bypass the PIR, the main circuit breaker is connected to an AC network, the main circuit breaker is initially closed, and the PIR bypass switch is initially open such that the PIR is inserted and configured to limit the current flowing through the power converter;

• the method comprising:
• acquiring, by a controller, information indicative of a fault in the power transmission network;
• in response to acquiring the information indicative of a fault in the power transmission network:
• providing, by the controller, a first command to close the PIR bypass switch, whereby to bypass the PIR;
• and
• providing, by the controller, a second command to open the main circuit breaker, whereby to disconnect the power converter from the AC network.