Systems and methods for power interruption

A power distribution module for use in a power distribution system, said power distribution module comprising:

• a plurality of power interruption circuits, wherein each of said plurality of power interruption circuits is configured to provide direct current (DC) power to a respective load, each of said plurality of power interruption circuits comprising:
• a shunt resistor;
• a plurality of switches;
• an amplifier configured to amplify a DC voltage across said shunt resistor;
• an analog to digital converter configured to convert the amplified voltage into a digitized shunt voltage value;
• and
• a microprocessor configured to:
• calculate a resistance of said shunt resistor based on a measured temperature of said shunt resistor;
• determine a digitized value of a current flowing through said shunt resistor based on the digitized shunt voltage value and the calculated resistance;
• determine a digitized value of a DC output voltage of said power interruption circuit;
• calculate, from the digitized current value and the digitized output voltage value, a power provided by said power interruption circuit to the respective load;
• adjust the calculated power to correct errors determined based on an age of said power distribution module;
• compare the calculated power to a threshold power level;
• and
• control said plurality of switches based on the comparison.

A method for controlling direct current (DC) power supplied to a load through a current interruption circuit, said method comprising:

• determining, using a processing device, a digitized value of a current flowing through a shunt resistor in the current interruption circuit, the determining comprising:
• amplifying a DC shunt voltage across the shunt resistor;
• and
• converting the DC shunt voltage into a digitized value of the DC shunt voltage;
• calculating a resistance of the shunt resistor based on a measured temperature of the shunt resistor;
• and
• determining the digitized value of the current based on the digitized DC shunt voltage value and the calculated resistance;
• calculating, using the processing device, a DC power provided by the current interruption circuit to the load, the power calculated from the digitized current value and the digitized output voltage value;
• adjusting the calculated DC power to correct errors determined based on an age of the power distribution module;
• comparing the calculated DC power to a threshold power level;
• and
• controlling at least one switch in the current interruption circuit based on the comparison.