Arc faults pose challenges to electric safety, which can cause serious fire hazards. However, the commonly used arc fault detection method is prone nuisance tripping. This paper proposed a hybrid based on improved Mel-Frequency Ceptral Coefficients (MFCC) for preprocessing and neural network model identification called ARC_MFCC. As per IEC 62606, twelve different loads/scenarios are considered ...

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...

DC series arc fault(DCSAF) in photovoltaic systems is a controversial issue owing to the challenges related its modeling and protection. This article focuses on efficient models based Schwarz model for DCSAF utilizing actual recorded data. The original has four parameters, containing two coefficients orders, all parameters are constant. Despite that uses invariant modeling, proposed employ whic...

In the research of fault arc detection technology, proper signal denoising can greatly improve recognition ability algorithm. Therefore, this study proposes a current enhancement algorithm based on improved spectral subtraction from statistical law electrical noise in low-voltage distribution system and principle According to results algorithm, selects an appropriate reference as basis for esti...

Characterization of the fault space of a cipher to filter out a set of faults potentially exploitable for fault attacks (FA), is a problem with immense practical value. A quantitative knowledge of the exploitable fault space is desirable in several applications, like security evaluation, cipher construction and implementation, design, and testing of countermeasures etc. In this work, we investi...

Abstract The Vrancea seismic zone, located in the bend region of South-Eastern Carpathians, is a unique area with both crustal and intermediate-depth activity known as one most active Europe. Moderate seismicity recorded all over Carpathian region, but far more intense occurs small subcrustal seismogenic volume beneath SE‐bend arc about 20 × 50 km lateral 110 vertical extent (70–180 depth). A s...