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Lightning protection experiment will be carried out by using rocket triggered lightning in Lake Jatiluhur in West Java, Indonesia. rocket pull up a copper wire located at the bottom side of the rocket and launched from the top of a platform to trigger the lightning. Copper wire connected to a measuring instrument at the launching pad. Up to a certain height, when strong electric field penetration...
This paper presents an open framework for the lightning performance of overhead lines. The goal is to provide the technical community with a common set of tools to allow an objective assessment of voltage and current transient responses due to lightning strikes. As it is developed as open source, all the modeling involved can be further modified or improved. It is developed considering mainly the...
In this work is presented in a simulated environment, the analysis of the required length of conterpoise cable connected to the ground rod in a transmission line located in Maceió, Brazil, capable of avoiding the phenomenon known as back flashover, in other words, the disruptive discharges of return in the chain of insulators when subjected to standardized atmospheric discharges considering some values...
This paper presents a study of the lightning performance of subtransmission lines located in high ground flash density areas according to the design of the grounding systems. Analysis of the behavior of 69 kV and 138 kV lines under direct lightning strokes is performed for grounding systems dimensioned based on a fixed value of the low frequency resistance established by Brazilian regulations, and...
The strike of lightning directly or even nearby an electrical installation produces electromagnetic pulses and consequently induces over voltages on equipment ports inside a building structure. From an electromagnetic compatibility point of view, knowledge of the magnetic fields in the internal structures is essential for the development of protective systems against surges. This paper presents an...
Calculation results of attachment probability to conductors of 220–500 kV overhead transmission lines without shielding wire depending on polarity of instantaneous voltage are presented. For overhead lines with a horizontal arrangement of conductors without shielding wire the probability that a negatively charged lightning will strike to a positively charged phase rather than to a negatively charged...
This paper presents an evaluation of transient electromagnetic phenomena inside lightning protection systems (LPS) model of truss bridge resulting from direct lightning strikes. The simulation model is base on the coupled transmission line network in the frequency domain combined with the Fourier transform technique, which is employed to evaluate the electromagnetic transient surge current distribution...
Corona discharge causes the attenuation and distortion of lightning and switching surges propagating along overhead transmission lines. Therefore, knowledge on surge corona characteristics is of great importance for insulation coordination studies. Most of the studies pertaining to corona effects on wave propagation on overhead line conductors neglect the fact that surge corona inception is stochastic...
In this paper, we use a combination of circuit and magnetic field to study simulation analysis of electromagnetic effect on buried metal pipes when lightning 330kV transmission lines. Through the establishment of EMPT time domain simulation model, the distribution characteristics of the lightning current and the current of the tower are obtained when the transmission line tower is struck by lightning...
Large-scale ground-mounted PV plants, because of their large extend and localization, can be subject to lightning strikes. When a lightning strike falls into the area of the PV plant, the earthing system is affected by the current flowing in the lightning channel and potentially dangerous overvoltages may occur. Thus, the investigation on the performance of the grounding system is of paramount interest...
In this work, a general code is obtained to facilitate the simulation of the electromagnetic transient response of a transmission line excited by a nearby lightning stroke using EMTP-type programs, namely ATP (Alternative Transients Program) and PSCAD (Power Systems Computer Aided Design). Initially, a frequency domain model of a field-excited (illuminated) line is implemented using Taylor's formulation...
Evaluation of surface electric fields, which is well described by Poisson equation, is of great importance on many occasions in power system. This paper proposes a boundary element method for long slender conductors. Examples show the method is convergent and shows great potential for the evaluation of electric field generated by slender conductors.
This paper analyzed the effect of the multi-grounded neutral on the peak values and waveforms of the lightning induced voltages (LIVs) in an overhead power distribution line. The results show that the LIV waveforms observed close to a neutral grounding point are smooth, while those observed around the mid-point between two consecutive grounding points are oscillatory. The waveform oscillations are...
Lightning strokes cause mainly outages of transmission lines. A lightning study takes into consideration possible impacts of lightning strokes on transmission systems. The lightning performance of multi-circuit transmission tower with AC and DC circuits is investigated. Till today lightning analysis of HVDC and HVAC systems were done separately. Since both systems will be installed on the same tower,...
Lightning currents with high-frequency oscillations have been measured on the top of the Peissenberg Tower in Germany. In 2007, the tower top section was replaced by a smaller construction. After the replacement, the frequency of the oscillation changed from formerly ∼12.5 MHz to MHz. The pulsation was less significant for the currents at lower tower sections and for the nearby electric and magnetic...
In Japan, the introduction of smart meters into distribution systems has recently been accelerating. Since smart meters are low-voltage electronic equipment, they are considered to be vulnerable to disturbances such as lightning surge. In this study, we first experimentally examined the lighting failure of smart meters caused by a transient magnetic field. Then, we calculated the lightning damage...
This paper shows that the criteria for the installation of surge protective devices (SPD) in power distribution panels as prescribed in standards on lightning protection and on low-voltage electrical installations may not prevent damages of sensitive electronic equipment, regardless of the protection level of the SPD and ground impedance. This is due to a not so evident source of damages related to...
This paper addressed surge propagation on a vertical line with a discontinuity. A formula of surge reflection coefficient expressed by specially-defined surge impedance was introduced, which is similar to that of a conventional transmission line. The formula for the discontinuity with a lumped resistance was also presented. With these formulas, surges on the line with the discontinuity can be evaluated...
A majority of failures in power transmission line are due to trip-out in power transmission line as a result of lightning strike on power transmission line or pole and tower, how to reduce trip-out rate in transmission line becomes focus of attention in electric power system at the present time. The paper has established model for lightning current amplitude and impulse coefficient of ground device...
Based on the method of moment (MOM) and marching on-in-time method (MOT), a new method to solve the time domain integral equation (TDIE) was put forward, which can be used to investigate the transient response of the complex electrical networks and those with lumped parameters electrical element effectively. With the axial currents on the metal conductors taken as unknown variables, and the piecewise...
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