15 Results for the search " overvoltage":
AC line pipeline magnetic coupling
Description:Example of overvoltage induced by magnetic coupling between a line and a pipeline
Tag(s): pipeline, coupling, induced, overvoltage
IEEE FD ZnO model
Description:This device automatically adjusts the parameters of the frequency dependent ZnO model (see figure below) as described in IEEE Working Group 3.4.11 on Surge Arrester model.
This model may be used... see more for switching and lightning transient analyses only.
This model may not be used Temporary OverVoltage (TOV) and other low frequency analyses.
Tag(s): surge, arrester, ZnO, IEEE, frequency dependent, IEEE Working Group 3.4.11
INDUCED VOLTAGES AND CURRENTS: OVERVIEW AND EVALUATION OF SIMULATION MODELS AND METHODOLOGIES
Description:In this paper induced voltages and currents caused by underground cables are calculated in cable sheaths and nearby metallic pipelines. The performance of several simulation methods and models are inv... see moreestigated in steady-state, considering also different implementations in ATP-EMTP, EMTP-RV and PSCAD/EMTDC. The analysis is extended in the simulation of transient overvoltages in cable systems, evaluating the accuracy of two widely used simulation models. The influence of different parameters is investigated, among them specifically the earth properties. Results reveal that implementing accurate earth representations, earth conduction effects have a significant impact on induced voltages at the power frequency, while for high frequency phenomena the influence is minor.
Tag(s): induced voltages
LVRT OVRT function
Description:This device is an OVRT LVRT protection device.
The user enters the curves points.
It is assumed that the curve is horizontal between two points.
Tag(s): LVRT, OVRT, ride, through, FRT, undervoltage, overvoltage
Selection of MV/LV Transformers to be Protected by Surge Arresters against Indirect Lightning Overvoltages
Description:The papers addresses the problem of locating surge protective devices in a medium voltage distribution network by means of an accurate computer model for the calculation of lightning induced overvolta... see moreges and a Monte Carlo statistical procedure. The indirect lightning performance of small network cells of different configuration are evaluated and used as a benchmark for the validation of the surge arrester locations provided by a genetic algorithm procedure. The obtained results appear useful for the lightning protection design of networks
with complex topology.
Authors: Alberto Borghetti, Fabio Napolitano, Carlo Alberto Nucci, Fabio Tossani, Gilnei J. G. Dos Santos, Donorvan R. Fagundes, Gustavo P. Lopes, Manuel L. B. Martinez
2014 International Conference on Lightning Protection (ICLP), Shanghai, China
Tag(s): distribution network; surge arresters; lightning protection.