Results 151 to 160 of about 329 (178)
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2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), 2021
Long Temporary Over-voltages (TOVs) due to pole-to-ground faults occur in HVDC cable transmission systems with VSC. Preliminary experimental and numerical studies of the possible adverse effects of these long TOVs on HVDC extruded insulation cables have been started by the authors, focusing on one single DC-XLPE insulated 320-kV case-study cable for ...
G. Mazzanti, B. Diban
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Long Temporary Over-voltages (TOVs) due to pole-to-ground faults occur in HVDC cable transmission systems with VSC. Preliminary experimental and numerical studies of the possible adverse effects of these long TOVs on HVDC extruded insulation cables have been started by the authors, focusing on one single DC-XLPE insulated 320-kV case-study cable for ...
G. Mazzanti, B. Diban
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Special methods for the calculation of temporary overvoltages due to transformer saturation
2001 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.01CH37194), 2002Summary form only given as follows. During power restoration, the energization of a no load transformer can lead to high overvoltages, the amplitude being sensible to initial conditions. This document describes an approach based on the AUTO program, which is a complementary tool to EMTP, and may help the understanding of the behaviour of the electrical
M. Rioual, C. Sicre, K.B. Driss
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Insulation co-ordination for continuous operating voltages and temporary overvoltages
Electrical Engineering, 2005This paper presents an approach to the insulation co-ordination of electric-power installations in the scope of the continuous operating voltages and temporary overvoltages; this approach opens the possibility to calculate the necessary required withstand voltages of unit insulations for short-duration (1 min) power-frequency test voltage, with respect
Zdravković, Zlatoje +2 more
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, 2020 Analytical prediction of abnormal temporary overvoltages due to ground faults in MV networks
Electric Power Systems Research, 2007Abstract The paper deals with the temporary overvoltages that build up in radial MV distribution networks following the inception of a 1-phase-to-ground fault. It will be demonstrated that, for extended cable/overhead MV distribution networks with ungrounded neutral, in case of low resistance faults at critical locations along overhead lines, the ...
GATTA, Fabio Massimo +3 more
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Energy stresses of station surge arresters due to temporary overvoltages
2009Usually the voltage rating of station surge arresters is chosen higher than the amplitude of the temporary overvoltages (TOV) which can occur in the power system. This approach leads to the use of arresters with a high protection levels, especially if the system is not solidly grounded, which do not reduce the level of slow-front and fast-front ...
Pavić, Ivica +2 more
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Ground Fault Temporary Overvoltages in MV Networks: Evaluation and Experimental Tests
IEEE Transactions on Power Delivery, 2012Single-phase-to-ground faults may cause substantial temporary overvoltages (TOVs) in large radial medium-voltage networks with isolated neutral, even over 3-p.u. phase to ground. Resonant neutral earthing limits these overvoltages to 1.8 p.u. but credible earthing apparatus failures might trigger TOVs up to 2.4 p.u. This paper presents the ground fault
Alberto Cerretti +5 more
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A Mitigation Strategy for Temporary Overvoltages Caused by Grid-Connected Photovoltaic Systems
IEEE Transactions on Energy Conversion, 2015Widespread penetration of distributed generators (DGs) into the power system has aggravated the problem of temporary overvoltages (TOVs), which can inflict substantial damages on the DGs, equipment, and other customers. Through slight modifications to the power-electronic circuit and its control, this paper proposes a strategy for limiting the TOVs ...
Hamidreza Ghoddami, Amirnaser Yazdani
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ANALYSIS OF TEMPORARY OVERVOLTAGES IN THE INTEGRATION OF ELECTRICAL ENERGY STORAGE SYSTEMS
Zbornik radovaThe increasing demand for electrical energy by consumers presents a key challenge for the power system due to its impact on system stability. This leads to deviations in voltage and frequency from nominal values, a problem further exacerbated by the integration of renewable energy sources (RES) into the distribution network due to their variability. To
Suzana Nikolić +2 more
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