Investigation of Operating Point Setting and Stability Behavior of LVDC Arc Flashes

Short circuits in electrical power systems often lead to arc flashes, prompting increased demands for protection, especially in LVDC systems. Static equivalent circuit models are commonly used to estimate arc flash characteristics under steady-state conditions. However, these models typically overlook dynamic behavior around the operating point and its impact on arc fault stability. Laboratory measurements in a DC test circuit with various parameters were conducted to investigate operating point setting and arc fault extinguishing tendencies. Insights into dynamic stability and stability indicators were derived, aiding in the selection of appropriate personal protective equipment (PPE) during hazard assessments.