Ground fault protection systems and methods

摘要

A ground fault protection system (216) is disclosed. The ground fault protection system may include a controller (306) that is configured to receive signals representing a ground fault detection voltage and a DC link voltage of a machine (100). Based on the ground fault detection voltage and the DC link voltage, the controller may determine a ground fault detection percentage value. The controller may compare an absolute value of the worst case component insulation voltage with a rated insulation voltage of a component of the machine. When the absolute value of the worst case component insulation voltage is higher than the rated insulation voltage, the controller may determine a new DC link voltage based on the rated insulation voltage and the ground fault detection percentage value, and may output a signal for operating the machine by using the new DC link voltage.