Damping-disconnect circuit for a power converter

A system comprising:

• a damping-disconnect circuit configured for connection to a filter circuit of a power converter, the damping-disconnect circuit comprising:
• a plurality of silicon-controlled-rectifiers (SCRs), each SCR configured to be electrically connected to a capacitive network in one phase of a multi-phase filter apparatus;
• and
• a plurality of switches, each switch configured to turn ON a respective SCR of the plurality of SCRs in response to a trigger signal, wherein the damping-disconnect circuit is configured to eliminate or attenuate circulating current in the filter circuit.

A control system configured to:

• determine whether an alternating current (AC) source electrically connected to a filter circuit of a power converter is in a fault condition;
• if the AC source is not in a fault condition, determine whether the power converter is in a READY state;
• if the power converter is in the READY state, causing a thyristor in the damping-disconnect circuit to be ON such that current from the filter circuit flows in the damping-disconnect circuit;
• and
• if the power converter is not in the READY state, causing the thyristor in the damping-disconnect circuit to be OFF.