Study on the Feature Space Detection Method of DC Arc Fault for Photovoltaic system

An arc fault on the DC side of photovoltaic system is a potential safety hazard and difficult to detect due complexity systems. The detection method series in systems investigated here. test platform for established collect current signal under normal conditions. In this study, time domain characteristics, frequency time-frequency characteristics are compared by analysing data from before after states: corresponding feature vectors used construct space system, according position detected, so as realise effective information. Then establishing introduced key parameters determined. Finally, anti-interference ability verified. results showed that both feasible accurate.