Investigation of Electrical Faults in a DC Microgrid Based on the Identification of Impedances in Differential Mode

Locating defects and their speed of resolution is the most ambitious goal of an electrical installation. In this context, the work proposes an investigation study in a DC microgrid based on the identification of the differential mode impedance as a reference model, more than on the diagnosis of the degradation of the passive components and in particular the filter capacitors. The model presents the whole system which allows it to monitor the state of the whole cell. It facilitates the maintenance of the installation in the preventive as corrective and increases the system reliability. The document provides analytical analysis tested by simulation and validated experimentally over a wide frequency range.