Results 171 to 180 of about 3,083 (217)
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Virtual Instrument for Lightning Impulse Tests
IEEE Transactions on Power Delivery, 2007We propose an objective formulation of the impulse analysis problem from a signal analysis viewpoint. The winding response is quintessentially that of a deterministic network to a finite energy signal, with breakdown and partial discharge being inherently nonlinear events.
A. Palani, V. Jayashankar
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A new proposal for the evaluation of lightning impulses
Proceedings of the 6th International Conference on Properties and Applications of Dielectric Materials (Cat. No.00CH36347), 2002In this contribution a new method for the characterization of lightning impulses superimposed with oscillations and overshoot is presented. The proposal bases on experimental investigation on lightning impulse tests performed with different dielectric media in the framework of an European project.
K. Hackemack +3 more
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Electrical parameters of water at lightning impulse
Proceedings of the 2014 15th International Scientific Conference on Electric Power Engineering (EPE), 2014This paper deals with the description of the behavior of water at lightning impulses. The electric potential distribution in water at lightning impulses is simulated for the calculation of the safe distance. There are not hazardous conditions to human body at distances greater than the safe distance.
Michal Krbal +3 more
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Lightning Impulse Voltage Evaluation
2017This research studied and developed software for lightning impulse voltage parameters evaluation. Full lightning impulse voltage of 9 cases in TDG program had been used as references for software tested. This software created 2 types of voltage waveform which are mean curve and approximate real curve. Kalman Filter had been used for mean curve.
Nopphadon Khodpun, Krisada Vilailak
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Modern impulse generators for testing lightning arresters
Electrical Engineering, 19421. Thorough testing of lightning arresters requires a wide variety of impulse-current waves. 2. The strictly mathematical calculation of circuit constants to produce such waves is limited to the few cases where the circuit resistance is constant. 3. Valve-type lightning arresters have a resistance that is intentionally a function of voltage or current ...
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Modelling HV reference dividers for lightning impulses
11th International Symposium on High-Voltage Engineering (ISH 99), 1999In this paper a numerical model for the simulation of the performances of HV reference dividers is presented; the model, based on a numerical procedure coupling electric field analysis and electrical circuit, is applied to the analysis of the 200 kV lightning impulse reference divider of the Istituto Elettrotecnico Nazionale Galileo Ferraris in Italy.
BOTTAUSCIO, ORIANO +3 more
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Effects of Soil Ionization and Lightning Impulse Corona on Lightning Current Strike
2020With the new structural changes of power system that has emerged in recent years, which makes manufacturing units transmit more and more electrical power from the transmission lines, it is expected that a wider voltage collapse in the power systems happens.
Amouzad Mahdiraji, Ebadollah +1 more
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Coaxial attenuators for standard lightning impulse measurements
2012 Conference on Precision electromagnetic Measurements, 2012Characteristics of coaxial resistive attenuators of digital instrument for the standard full lightning impulse(LI) measurement are studied. The amplitude - frequency characteristics and the input impedance of two kinds of attenuators are analyzed. An approach to evaluation the scale factor of peak voltage for the attenuators are introduced based on the
Na Liu, Yiye Wu, Jiawei Chen
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Impulse current testing system for simulating lightning effect
2014 International Conference on Audio, Language and Image Processing, 2014This paper introduced the impulse current testing system for simulating lightning effects. The shield method to suppress the interference was addressed in this paper. After compared with three filter methods, it was verified that the wavelet transform is most suitable for measuring the impulse by using the digital filter technology to get the actual ...
Yi Lin, Qibin Zhou
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Lightning Impulse Current Tests on Conductive Fabrics. [PDF]
CoRR, 2019 Submitted to "Journal of Industrial Textiles"The large amount of electric current associated to lightning discharges is hazardous for living beings, equipment, structures and buildings.
Jorge A. Cristancho C. +5 more
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