Observation of current waveshapes of lightning strokes on transmission towers

Narita, Takayuki; Yamada, Takeshi; Mochizuki, Azuma; Zaima, Eiichi; Ishii, Masaru

doi:10.1109/61.847285

Cited by 68 publications

(29 citation statements)

References 6 publications

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“…The back flashover is simulated by closing the parallel switch. Once the back flashover occurs, the voltage across insulator goes down to zero [1,9].…”

Section: Modeling Of Back Flashovermentioning

confidence: 99%

Back Flashover Analysis Improvement of a 220 kV Double Circuit Transmission Line

Radhika¹,

Suryakalavathi

2013

Fifth International Conference on Advances in Recent Technologies in Communication and Computing (ARTCom 2013)

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The objective of this paper, is to design a 220kV double circuit transmission model, which includes six insulator strings with six cross arms and other components of the Transmission line i.e phase and ground conductors, line towers associated grounding systems with a surge of 100KA, 4/10 μs. The transmission line and back flashover event was modeled by frequency dependent fast front transient models due to the nature of higher frequency dependency of lightning strokes typically ranging from 1KHZ to 30 MHZ. Tower with two OHGW was taken in this work. Back flash over mechanism is modeled and triggered to the existing system by an external control module with powerful electrical tool PSCAD/EMTDC. Metal Oxide Transmission Line Arresters were used in this work as a solution for the back flashover. However, considering acceptable probabilistic failure as one outage per year per 100km line length, and suggested basic insulation level (BIL) of 1050KV, the arrester rating was calculated to be 196KV and its parametric determination for a one column arrester with an overall length of 1.45 meters is done. Simulation is carried out by placing Metal Oxide Arrester in each phase and recovering the string voltage without causing violent impact to the power grid.

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“…The back flashover is simulated by closing the parallel switch. Once the back flashover occurs, the voltage across insulator goes down to zero [1,9].…”

Section: Modeling Of Back Flashovermentioning

confidence: 99%

Back Flashover Analysis Improvement of a 220 kV Double Circuit Transmission Line

Radhika¹,

Suryakalavathi

2013

Fifth International Conference on Advances in Recent Technologies in Communication and Computing (ARTCom 2013)

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“…For example, Japanese guidelines warrant a lightning current of 100 kA amplitude with a 1 ms front duration and 70 ms wave duration, hitting the very first transmission line tower from the 275 kV substation in order to design (or analyse) its overvoltage protection [13]. Current parameters that are this strict might not be necessary in every case of 110 or 220 kV substations.…”

Section: Introductionmentioning

confidence: 95%

Parametric analysis of lightning stroke incidence to HV transmission line towers

Sarajčev

Goić

2010

Euro. Trans. Electr. Power

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SUMMARYA parametric analysis of lightning stroke incidence to high voltage (HV) transmission line towers is presented in this paper. It is based on a mathematical model that accounts for the transmission line geometry, keraunic level, statistical distribution of lightning current parameters and correlation between statistical variables defining the lightning current waveshape. Theoretical analysis is backed by the most recent propositions of parameters that define statistical distributions and then applied to the typical HV transmission line example. The results provide insight into the selection procedure for the lightning current parameters (i.e. amplitude, front duration, wave duration and polarity) associated with lightning stroke incidence to transmission line towers. This selection procedure could be applied in backflashover analysis as well as in the analysis (and design) of HV transformer station overvoltage protection.

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“…In many actual waveforms of lightning current, the wavefront rises gradually at first but then rises steeply [9]. Hence, we may assume a steep lightning current flowing into the distribution line in the case of a direct stroke.…”

Section: Introductionmentioning

confidence: 98%

A distribution line model for lightning overvoltage studies

Matsuura

Noda

Asakawa

et al. 2010

Electrical Engineering Japan

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SUMMARYRecently, the focus of lightning protection measures for distribution lines has moved from a nearby lightning stroke to a direct lightning stroke. Studies of direct lightning stroke countermeasures are generally carried out by digital simulations using the EMTP (Electro-Magnetic Transients Program). Thus, components of a distribution line must be modeled appropriately in the EMTP for accurate simulations.The authors have previously clarified the surge response of a distribution line by pulse tests using a reducedscale distribution line model. In this paper, first, the results of the pulse tests are simulated in the EMTP using a conventional model which represents a distribution pole by a single lossless distributed-parameter line model, and comparisons with the test results show that transient overvoltages generated at the insulators cannot accurately be reproduced by the conventional model. This indicates that a special treatment is required to represent the transient response of a distribution pole and wires. Then, this paper proposes new EMTP models of the pole and wires which can reproduce the transient overvoltages at the insulators. The parameter values of the proposed models can be determined based on a pulse test result.

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Observation of current waveshapes of lightning strokes on transmission towers

Cited by 68 publications

References 6 publications

Back Flashover Analysis Improvement of a 220 kV Double Circuit Transmission Line

Back Flashover Analysis Improvement of a 220 kV Double Circuit Transmission Line

Parametric analysis of lightning stroke incidence to HV transmission line towers

A distribution line model for lightning overvoltage studies

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