Results 41 to 50 of about 7,353 (217)
International Journal of Educational Leadership and ManagementEl liderazgo de directores/as de establecimientos EMTP tiene múltiples desafíos de gestión, tanto desde lo administrativo como lo pedagógico, pues deben responder a las demandas del ámbito laboral y social.
Andrea Carrasco-Sáez +1 more
doaj +1 more source
Energies, 2020 Protection of transformers, as one of the most expensive equipment in the power system, against lightning overvoltage impulses is a vital task. This paper, for the first time so far, investigates the effects of a filtered spark gap on the protection ...
Mahdi Pourakbari-Kasmaei +6 more
doaj +1 more source
Proximity-Aware Calculation of Cable Series Impedance for Systems of Solid and Hollow Conductors [PDF]
, 2014 Wide-band cable models for the prediction of electromagnetic transients in power systems require the accurate calculation of the cable series impedance as function of frequency.
Gustavsen, Bjorn +2 more
core +1 more source
IET Electric Power Applications, Volume 20, Issue 1, January/December 2026.This paper primarily investigates the patterns of overvoltage changes during an interruption of oil‐immersed iron‐core reactors by circuit breakers and their distribution along the axial windings of the reactor, which optimises the winding structure. ABSTRACT This paper primarily investigates the patterns of overvoltage changes during an interruption ...
Hongyan Nie +4 more
wiley +1 more source
Analytical Frameworks and Theories of Electric Power in Non‐Linear Circuits
IET Generation, Transmission &Distribution, Volume 20, Issue 1, January/December 2026.Based on the challenges of distorted currents and non‐linear components in modern power grids, this article reviews seminal electrical power theories that seek to generalize the traditional definitions of active, reactive, and apparent power. It provides a detailed analysis of their mathematical foundations, practical implementation, and validity.
Rafael Escudero, Luis Ibarra
wiley +1 more source
Energies, 2019 A new approach to lightning transient studies including complex grounding grids is presented in this paper. The grounding system is modeled in Matlab/Simulink based on the transmission line theory.
Vegard Steinsland +3 more
doaj +1 more source
First record of the epizoic red seaweed Polysiphonia carettia Hollenberg in the Mediterranean Sea. [PDF]
, 2001 Primera cita del alga roja epizoica Polysiphonia carettia Hollenberg en el mar Mediterráneo Key words. Caretta caretta, epibionts, Mediterranean Sea, Polysiphonia carettia. Palabras claves.
Báez, José C. +4 more
core +4 more sources
IET Science, Measurement &Technology, Volume 20, Issue 1, January/December 2026.This article presents a practical parameter‐extraction method for a lumped‐element three‐phase transformer model based on primary‐current data from a finite‐element simulation. In particular, the no‐load and short‐circuit cases are used to extract the leakage parameters, also capturing load cases.
Alexander Sauseng +3 more
wiley +1 more source
The Journal of Engineering, 2018 The modelling of tower grounding device is the key for calculation of lightning strike response and lightning withstand level. In order to solve this problem, this study proposes a method to calculate the lightning response of transmission line grounding
Huaifei Chen +6 more
doaj +1 more source
Development of diagnostic and prognostic algorithms for SF6 puffer circuit breakers from transient waveforms: a validation proposal [PDF]
, 2009 - This paper presents a validation proposal for development of diagnostic and prognostic algorithms for SF6 puffer circuit-breakers reproduced from actual site waveforms.
Kam, Shui-cheong, Ledwich, Gerard
core +1 more source