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Analysis of Lightning Overvoltages on Overhead Hybrid Lines
2022 36th International Conference on Lightning Protection (ICLP), 2022This paper analyzes the overvoltages associated with direct strokes to a hybrid overhead line (138 kV and 13.8 kV circuits sharing the same structures). The voltages are calculated using the EMTP-RV, and their dependence on parameters such as the stroke current front time, soil resistivity, and impedance of the grounding system is discussed.
Moraes, L. B. +6 more
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Modeling of Nonlinear Elements during Lightning Overvoltage Simulations
2008 International Conference on High Voltage Engineering and Application, 2008The paper presents some problems of lightning overvoltage modeling in transmission lines with nonlinear elements. The presented results were obtained mostly for fast front transients of subsequent lightning return stroke currents. The effectiveness of numerical algorithms of nonlinear models and possibilities of their development for such transients ...
J. Bajorek +3 more
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Overvoltages in photovoltaic systems induced by lightning strikes
2012 International Conference on Lightning Protection (ICLP), 2012The high number of photovoltaic systems raises questions regarding their operational security even under extremely weather conditions like thunderstorms. Therefore a simplified model of a photovoltaic system, consisting of typical arrangement of solar-panels, was investigated.
Z. Benesova +3 more
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Lightning induced overvoltages: effects on consumer service entrance
2003 IEEE Bologna Power Tech Conference Proceedings,, 2004This work presents evaluations concerning lightning induced overvoltages on low voltage distribution lines. The results were obtained by simulation, employing an elaborated electromagnetic model. Sensitivity analyses were developed in order to relate the effect of physical characteristics of line to the level of induced overvoltage at consumer service ...
F.H. Silveira, S. Visacro
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Lightning overvoltages on complex low-voltage distribution networks
Electric Power Systems Research, 2012Abstract This paper presents a theoretical investigation on lightning overvoltages on low-voltage (LV) networks installed in urban areas. The combined effect of lightning-induced voltages and transferred lightning surges through distribution transformers is taken into account.
Alberto De Conti +2 more
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Overvoltage investigation of wind farm under lightning strokes
IET Conference on Renewable Power Generation (RPG 2011), 2011Wind turbine generators are frequently subjected to lightning due to their locations and height. So, the performance of wind farm under such events is worthy investigated. This paper studies the surge propagation through wind farm when a lightning hits blade of one of the wind turbines.
A.M. Abd-Elhady +2 more
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Lightning and overvoltage protection of wind power farms
2011 International Symposium on Lightning Protection, 2011Wind power farms are prone to lightning due to their height, especially when installed off-shore. Very different voltage stresses are expected compared to three phase power systems. Test standards, technical specifications and application principles have been developed only recently on CENELEC level.
Bernhard Richter, Vincent Crevenat
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Calculating Lightning Overvoltages Transferred Through a Transformer
1998Lightning overvoltages transferred from the high-voltage system through the generator transformer to medium-voltage circuit of the power plant are calculated. The determination of transformer capacitances is described. A close lightning strike at high-voltage transmission line 220 kV is simulated.
Uglešić, Ivo, Lukić, Mažana
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Lightning overvoltages in wires within the buildings
IEEE 1991 International Symposium on Electromagnetic Compatibility, 2002Electromagnetic fields generated by lightning currents may cause damage or interference in the operation of electronic and electric systems. Particularly hazardous to equipment operating within a building is a direct lightning strike to the building or its vicinity.
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Lightning-Induced Overvoltages Transferred Through Distribution Power Transformers
IEEE Transactions on Power Delivery, 2009This paper deals with the calculation of lightning-induced overvoltages on medium-voltage (MV) and low-voltage (LV) distribution networks taking into account the presence of MV-LV distribution transformers and, in particular, the surge transfer through them.
BORGHETTI, ALBERTO +4 more
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