Linearized System and Fault Modeling Methods for DC-Grids Including Factorial Analysis

For the purpose of refined fault detection in DC grids, linear models of components, cabling and possible faults can be applied in order to model the first milliseconds after a possible sudden event. Using a semi-analytical model, a factorial analysis of signals at voltage and current sensors is set up – specific signal patterns representing either fault events or changes between normal operation modes are estimated. With these results, refined fault detection methods avoiding false tripping can be implemented and parametrized.