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Overvoltages caused by switching unloaded cable lines by a vacuum switch
Electrical Engineering, 2004The paper presents results of the studies on overvoltages generated while switching unloaded medium voltage (MV) power cable lines by a vacuum switch. The studies were carried out while switching real MV cable lines and their physical models. It has been found that overvoltages and overcurrents are generated during switching, and that under certain ...
Ryszard Batura, Władysław Opydo
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Harmonics and transient overvoltages due to capacitor switching
[Proceedings] 1992 Rural Electric Power Conference. Papers presented at the 36th Annual Conference, 1993This work presents a study of the steady-state and transient effects of power factor correction capacitors on the utility and on the customer. In the presence of harmonic-producing loads, capacitors used for power factor correction can cause parallel or series resonance problems which tend to increase the total harmonic distortion (THD) of the voltage ...
A.A. Girgis +3 more
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Overvoltages in power transformers caused by no-load switching
IEEE Transactions on Power Delivery, 1995When an unloaded power transformer is switched on via a relatively long cable, sometimes extreme high voltages appear at the secondary side of the transformer. These overvoltages are caused by a resonant phenomenon that occurs when the resonant frequencies of the transformer and the cable match.
Paap, G.C. (author) +2 more
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Mitigation of microgrid's switching overvoltages using supercapacitor
2017 Nineteenth International Middle East Power Systems Conference (MEPCON), 2017The mitigation of the switching overvoltages on microgrid systems is investigated in this paper using the supercapacitor. A comparison between a traditional switching overvoltages mitigation method, such as surge arrester, and the proposed supercapacitor-based mitigation method is studied.
Eman A. Awad +2 more
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Reduction of switching overvoltages by means of controlled switching
2020122
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Switching overvoltages in motor circuits for petrochemical applications
Record of Conference Papers. Industry Applications Society Forty-Seventh Annual Conference. 2000 Petroleum and Chemical Industry Technical Conference (Cat. No.00CH37112), 2002The switching of HV motor circuits in the MW range can cause large overvoltages on motor terminals. The amplitude of the resulting voltage spikes depends on breaker and circuit characteristics. If the amplitude of switching overvoltages exceeds the BIL (basic insulation level) of the motor, overvoltage protection circuitry should be installed to ...
M. Berth, L. Kung, E.F.D.E. Limbeek
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Reduction of Switching Overvoltages in EHV and UHV Systems
IEEE Transactions on Power Apparatus and Systems, 1971The reduction of switching overvoltages by means of synchronized circuit-breakers with pre-insertion resistors is studied. The influence of system and breaker parameters is ascertained. The study shows that the reduction obtainable in a shunt-compensated system is sufficient for future UHV applications.
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Switching overvoltages caused by shunt reactor switching and mitigation methods
IET Conference Proceedings, 2023P. Hackl +5 more
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Transformer modelling for switching overvoltages
Proceedings. Joint International Power Conference Athens Power Tech,, 2005B.C. Papadias +2 more
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Phase-Phase Switching Overvoltages, Transmission Lines
2018Phase-phase insulation naturally occurs in stations—between buses and from one piece of equipment to another. Therefore the phase-phase strike distance and SSFOR should always be considered in station insulation coordination studies. A phase-phase insulation always exists with a phase-to-ground insulation.
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