Owning to extensively enhancement of renewable energy resources in the distribution grids, employment such sources is also associated with various issues as islanding problem. In this paper, an effective method has been proposed for detection micro-grids comprised inverter or direct fed types distributed generations. The designed based on intrinsic modes voltage signal measured at PCC point. Mo...

Owning to the extensive enhancement of renewable energy resources in distribution grids, employment such sources has also introduced various issues, as islanding problem. In this paper, an effective method is proposed for detection micro-grids. The employs concept potential function drive index. Based on swing and equations, criterion derived based rate change function. index (IDI) takes into a...

Active distributed generations (ADGs) are more prevalent near consumer premises. However, the ADG penetration contribute a lot of dynamic changes in power distribution networks which cause different protection and control issues. Islanding is one crucial problems related to such ADGs; on other hand, islanding detection also challenging aspect. Therefore, an extensive review real-time depiction ...

• The AFD, SFS, SMS, and SVS active islanding detection methods. studied methods provide good times within the new grid standards. have under different parameters scenarios. are compared for first time in a detailed study. This paper systematically analyzes performance case studies scenarios of most well-known (IDMs) single-phase grid-connected photovoltaic (PV) systems. They named as follows: ...

The behavior of chromosomal inversions in Escherichia coli depends upon the region they affect. Regions flanking the replication terminus have been termed nondivisible zones (NDZ) because inversions ending in the region were either deleterious or not feasible. This regional phenomenon is further analyzed here. Thirty segments distributed between 23 and 29 min on the chromosome map have been sub...

Neuroblastoma (NB) is a pediatric cancer. New therapies for high-risk NB aim to induce cell differentiation and to inhibit MYCN and ALK signaling in NB. The vasoactive intestinal peptide (VIP) and the pituitary adenylate cyclase-activating polypeptide (PACAP) are 2 related neuropeptides sharing common receptors. The level of VIP increases with NB differentiation. Here, the effects of VIP and PA...

The adsorption and reaction in supercritical CO2 of the titanate coupling reagent NDZ-201 on the surfaces of seven metal oxide particles, SiO2, Al2O3, ZrO2, TiO2 (anatase), TiO2 (rutile), Fe2O3, and Fe3O4, was investigated. FTIR and TG analysis indicated that the adsorption and reaction were different on different particle surfaces. On SiO2 and Al2O3 particles, there was a chemical reaction of ...

The protection against the unintentional islanding of Grid-Tied inverters is an important electrical security issue addressed by main Standards. This concern justified in face fact that can lead to abrupt variations voltage and frequency, damages, professional accidents, power quality degradation, out-of-phase reclosure. In response concern, literature has proposed several Anti-Islanding Protec...

Microgrids that are integrated with distributed energy resources (DERs) provide many benefits, including high power quality, efficiency and low carbon emissions, to the grid. operated either in grid-connected or island modes running on different strategies. However, one of major technical issues a microgrid is unintentional islanding, where failure trip may lead serious consequences terms prote...