Advances in lightning protection and grounding systems for power systems

2004 ◽  
Author(s):  
M.M. Drabkin ◽  
R.B. Carpenter
Keyword(s):  
Power Systems ◽  
Lightning Protection

Lightning protection of power systems

2012 ◽  
Vol 85 ◽  
pp. 1 ◽  
Author(s):  
Alberto Borghetti ◽  
Shigeru Yokoyama
Keyword(s):  
Power Systems ◽  
Lightning Protection

scholarly journals Selected Issues of Safe Operation of the Railway Traffic Control System in the Event of Exposition to Damage Caused by Lightning Discharges

Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5808
Author(s):  
Renata Markowska ◽  
Zofia Wróbel
Keyword(s):  
Control System ◽  
Power Systems ◽  
Traffic Control ◽  
Lightning Discharge ◽  
Lightning Protection ◽  
Current Standard ◽  
Protection Measures ◽  
Railway Traffic ◽  
Protective Devices ◽  
Traffic Control System

Lightning discharge becomes a serious source of interference and damage for electronic and electrical power systems. Safe and reliable operation of railway traffic control systems requires proper protection against the effects of lightning. However, the current standards on lightning protection, PN-EN/EN/IEC 62305, do not cover railway objects. Moreover, there are no other standards or recommendations dedicated to the railway. The paper is an attempt to apply the procedure of lightning risk management according to PN-EN 62305-2 to select the proper protection measures in railway objects. A case study for the signal box with installed relaying and digital stations of the railway traffic control system is analyzed. The analysis comprises calculations based on the current standard PN-EN 62305-2:2012 but including the issues specific to railway traffic control. The risks of lightning losses have been calculated for two cases: without lightning protection measures and with protection measures proposed to decrease the risks below the tolerable values. The results show that a practically effective solution to reduce the risks is applying surge protective devices with proper characteristics. Another way is replacing unshielded incoming lines with shielded ones of given shield bonding way, and supplementing it with surge protective devices when necessary.

scholarly journals Application of Genetic Algorithm to Estimation of Function Parameters in Lightning Currents Approximations

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
V. Javor ◽  
K. Lundengård ◽  
M. Rančić ◽  
S. Silvestrov
Keyword(s):  
Genetic Algorithm ◽  
Power Systems ◽  
Lightning Discharge ◽  
Lightning Protection ◽  
Lightning Stroke ◽  
Vertical Antenna ◽  
Stroke Models ◽  
Triggered Lightning ◽  
Extended Function ◽  
Good Agreement

Genetic algorithm (GA) is applied for the estimation of two-peaked analytically extended function (2P-AEF) parameters in this paper. 2P-AEF is used for approximation of measured and typical lightning discharge currents. Lightning discharge channel is often modeled as thin-wire vertical antenna at perfectly conducting ground. Engineering lightning stroke models assume that the current along that channel is related to the channel-base current which may be measured at the instrumented tall towers and in triggered lightning experiments. Mathematical modeling of lightning currents is important in verification of lightning strokes models based on simultaneously measured electromagnetic fields at various distances, so as in lightning protection studies, computation of lightning induced effects and simulation of overvoltages in power systems. Typical lightning discharge currents of the first positive, first negative, and subsequent negative strokes are defined by IEC 62305 Standard based on comprehensive measurements. Parameters of 2P-AEF’s approximation of the typical negative first stroke current are determined by GA and compared to approximations obtained by other functions. Measured currents at Monte San Salvatore in Switzerland, at Morro de Cachimbo Station in Brazil, and in rocket-triggered lightning experiments at Camp Blanding in Florida are approximated by 2P-AEFs, and good agreement with experimentally measured waveshapes is obtained.

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