Parallel generator systems and controllers therefor

A non-transitory computer readable medium, comprising computer executable instructions configured to cause a computer perform a method for controlling a parallel generator system, the method comprising:

• initializing a no-load regulation voltage variable (V_no_load) to a desired bus voltage;
• initializing a foldback gain variable (foldback_gain) based on a desired current sharing percentage that each of a plurality of generators sources to a total load, wherein the foldback gain variable is a slope of a foldback curve;
• initializing a calibration offset voltage variable (V_cal_offset) to zero;
• determining a respective generator's source current using current sensors in series with the respective generator's output and setting as variable (Source_current);
• determining a desired voltage regulation point based on the desired no-load regulation voltage (V_no_load), the respective generator's source current measurement (Source_current), the foldback gain (foldback_gain), and the calibration offset variable (V_cal_offset) using the following equation:
• Regulation_voltage[V]=V_no_load[V]−(Source_current[A]*foldback_gain[V/A])+V_cal_offset[V];
• determining a total current (Total_current) in the parallel generator system by summing current readings from current sensors in series with all loads;
• determining a load sharing error (Sharing_error) using the following equation to compare sharing percentage to desired sharing percentage:
• Sharing_error[%]=(Source_current[A]/Total_current[A])−Desired_sharing_percentage[%];
• and
• changing the calibration offset voltage variable (V_cal_offset) based on negative feedback of the sharing error (Sharing_error) and a constant (V_cal_offset_max) according to the following equation:
• V_cal_offset[V]=−Sharing_error[%]*V_cal_offset_max[V].