基于窗口分形维数的直流MEA电力系统鲁棒串联电弧检测

The rapid development of more-electric transportation has led to increased use of higher voltage dc circuit architecture and battery storage. These developing technologies create a higher risk of dc arc failure resulting from component or insulation degradation. Arc faults present a risk to system reliably and safety, starting electrical fires that could prove catastrophic in transportation applications. To ensure ongoing passenger safety, the development of rapid dc arc fault detection methods is necessary. This article further develops the windowed fractal dimension (WFD) arc detection method for a range of linear and nonlinear loads, including networks containing switching power convertors. Results consistently show a substantial change in WFD at arc onset, and whilst the arc is sustained, for all load conditions. The outcome is a new method of fast dc arc detection requiring fewer calculation steps, fewer parameter settings, and reduced commissioning when compared to other arc detection methods, and can be used in tandem with existing protection schemes to provide a clear and robust indication of dc arc failure and prevent circuit damage.