Power system protection

An apparatus comprising:

• a condition detector configured to identify a condition at an input to a power converter from an alternating current bus, wherein the alternating current bus receives alternating current power from a generator, the power converter converts the alternating current power on the alternating current bus to direct current power on a direct current bus, the direct current power on the direct current bus powers a load, the condition is common mode current on the alternating current bus exceeding a first common mode current threshold simultaneously with input current to the power converter exceeding an input current threshold, and the condition is caused by at least one of the power converter, the direct current bus, or the load;
• and
• a breaker controller configured to disconnect the power converter from the alternating current bus in response to identifying the condition for at least a time period, wherein the time period is selected such that the breaker controller disconnects the power converter from the alternating current bus before the alternating current bus is disconnected from the generator due to the condition.

A method for protecting a power system, wherein the method comprising:

• identifying a condition at an input to a power converter from an alternating current bus, wherein the alternating current bus receives alternating current power from a generator, the power converter converts the alternating current power on the alternating current bus to direct current power on a direct current bus, the direct current power on the direct current bus powers a load, the condition is common mode current on the alternating current bus exceeding a first common mode current threshold simultaneously with input current to the power converter exceeding an input current threshold, and the condition is caused by at least one of the power converter, the direct current bus, or the load;
• and
• disconnecting the power converter from the alternating current bus in response to identifying the condition for at least a time period, wherein the time period is selected such that the power converter is disconnected from the alternating current bus before the alternating current bus is disconnected from the generator due to the condition.

A method for protecting a power system, the method comprising:

• identifying a condition at an input to a power converter from an alternating current bus, wherein the alternating current bus receives alternating current power from a generator, the power converter converts the alternating current power on the alternating current bus to direct current power on a direct current bus, the direct current power on the direct current bus powers a load, and wherein the condition is common mode current on the alternating current bus exceeding a first common mode current threshold simultaneously with input current to the power converter exceeding an input current threshold;
• and
• disconnecting the power converter from the alternating current bus in response to identifying the condition.

An apparatus comprising:

• a condition detector configured to identify a condition at an input to a power converter from an alternating current bus, wherein the alternating current bus receives alternating current power from a generator, the power converter converts the alternating current power on the alternating current bus to direct current power on a direct current bus, the direct current power on the direct current bus powers a load, and wherein the condition is common mode current on the alternating current bus exceeding a first common mode current threshold simultaneously with input current to the power converter exceeding an input current threshold;
• and
• a breaker controller configured to disconnect the power converter from the alternating current bus in response to identifying the condition.