In the usual practice, evaluation of overvoltages due to direct lightning strikes overhead power lines is focused on representation effects current injection, whilst coupling between conductors and electromagnetic pulse (LEMP) disregarded. Motivated by recent results obtained for case a medium voltage line configuration with shield wire, this paper extends analysis assess contribution LEMP perf...

surge and rotating stall phenomena are two dynamic instabilities that occur in both axial and centrifugal compressors. surge is the stream instability phenomenon in compressor that imposes severe damages to the compressors. nowadays, suppressing surge phenomenon is one of the most important issues in oil and gas industries, especially when flow reduction or gas reflux is considered. this resear...

In order to understand the thermal and electrical properties of surge arrester under standard climatic conditions, it would be useful evaluate heating progression in its different elements. These are constituted heterogeneous materials, which have physical nonlinear along arrester. Temperature predicting solutions for zinc oxide ceramic blocks provide fundamental elements electrothermal materia...

The application of transmission line surge arresters (TLSAs) is one the main approaches found to boost performance overhead lines (OHTLs) against atmospheric discharges. Thus, this work proposes a methodology for optimal placement TLSAs in OHTLs based on combination an optimization algorithm - inspired by General Variable Neighbourhood Search and Genetic Algorithm ATP (Alternative Transient Pro...

Nowadays, plenty of sensitive electronic devices are installed in secondary circuits substations. When lightning strikes a substation and transmission line, currents flow into the grounding structure through shield wires surge arresters primary circuit, overvoltages induced on control cables circuit owing to effect transient ground potential rises electromagnetic coupling. Shielded one counterm...