Increase in power generation capacity of electric power systems has lead to increase in the fault current level which can exceed the maximum designed short-circuit ratings of the switchgear. All the equipment therefore must have a short-circuit rating capable to withstand this level. Short-circuit currents contain extremely high energy and can damage electrical equipment. Typically, the circuit...

The single gate driven series connected power device stack possesses the advantages of high compactness and low cost. However, research its short circuit (SC) characteristic remains uncovered. This article fills this gap points out that, with driver it has potential over-current limitation. Furthermore, based on it, an improved silicon carbide (SiC) metal-oxide-semiconductor field-effect transi...

Power transformers are one of the main equipment in power production, with high cost and long manufacturing time. If a fault occurs during supply process, it will prevent normal operation system result no electricity available to users. One factors affecting safe is short circuit fault, faults at outlet substations or close proximity can also pose serious threat transformers. This article simul...

This paper proposes a comprehensive Markov model to study the reliability performance of conventional isolated multiple-switch pulse width modulation DC-DC (IMSDC-DC) converters including full-bridge, half-bridge and push-pull topologies. The suggested helps achieve more precise outcomes with better reflection real-world operation characteristics by (i) relying on self-embedded fault tolerant c...

In order to improve the power quality maintenance and reliability of power supply, different types of faults on the transmission line namely: open-circuit (OC), short-circuit (SC), high impedance faults (HIF) and the fault caused by direct lightning strike (LS) have been investigated in this paper. The disturbances have been modelled and simulated using a well-known transient simulation tool Al...

This article deals with the design of an electronic fuse for 380 V dc distribution systems. It has been devised applications that require current limitation up to 3 A, so approximately 1.2 kW. To protect main semiconductor against excessive energy dissipation, tripping time, defined as time circuit operates in current-limitation mode, varies fault magnitude, and eventually very hard conditions,...

The aim of this study is to employ the wavelet technique for diagnosis of open-circuit and short circuit faults in the dc link of Induction motor drive. The symlet wavelet is selected as the wavelet base to perform stator current analysis during faults. In this method, the stator currents are used as an input to the system. The MATLAB software is used to process discreet wavelet transform (DWT)...

5-Hydroxytryptamine (5-HT) can be released from mast cells and platelets through an IgE-dependent mechanism and may play a role in the pathogenesis of allergic bronchoconstriction. However, the effect of 5-HT on ion transport by the airway epithelium is still controversial. The objective of this study was to determine whether 5-hydroxytryptamine (5-HT) regulates NaCl transport by different mech...

The aim of this study is to employ the wavelet technique for the diagnosis of open-circuit and short circuit faults in the dc link of induction motor drive. The symlet wavelet is selected as the wavelet base to perform stator current analysis during faults. In this method, the stator currents are used as an input to the system. The MATLAB software is used to process discrete wavelet transform (...