Resetting a motor controller for power system protection

A method of resetting a motor controller, the method comprising:

• identifying an unbalanced voltage condition on an alternating current bus;
• disconnecting a power converter from the alternating current bus in response to identifying the unbalanced voltage condition for at least a time period selected such that the power converter is disconnected before the alternating current bus is disconnected from a generator due to the unbalanced voltage condition;
• determining whether a tripping of the motor controller is accompanied by the unbalanced voltage condition in a power system, wherein the power system comprises the generator, the alternating current bus, a power converter, and a direct current bus, and wherein the alternating current bus receives alternating current power from the generator, the power converter converts the alternating current power on the alternating current bus to direct current power on the direct current bus, and the direct current power on the direct current bus powers the motor controller;
• determining, in response to a determination that the tripping of the motor controller is accompanied by the unbalanced voltage condition, whether the unbalanced voltage condition is less than a threshold for more than a time delay;
• resetting the motor controller in response to a determination that the unbalanced voltage condition is less than the threshold for more than the time delay;
• reconnecting the power converter to the alternating current bus in response to the determination that the unbalanced voltage condition is less than the threshold for more than the time delay.