Computer Modelling and Analysis of Lightning Surges in HV Substations due to Shielding Failure

Nowak, W.; Tarko, R.

doi:10.1109/tpwrd.2009.2033077

Cited by 23 publications

(20 citation statements)

References 12 publications

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“…Because of the high frequency and short duration of lightning surges, the equipment in substation can be represented by its entrance capacitances shown in Tab. 2 [11]. The busbar can be deemed a discontinuity point with n lines of identical Z surge impedance connected to it [11].…”

Section: Parameters Of 10kv Substationmentioning

confidence: 99%

“…The experimental and operating experience in Guangdong power grid show this countermeasure is effective and economical [9]. However, the application of insulated tower head and cross arms would increase the lightning surges in 10kV substation [11], which creates new hazards to the equipment in substation. It's crucial to analysis the insulation coordination of such 10kV substations.…”

Section: Introductionmentioning

confidence: 99%

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Impact of distribution line insulated tower head and cross arms on lightning surges in 10 kV substations

Jiang

et al. 2014

2014 International Conference on Lightning Protection (ICLP)

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In order to reduce the lightning trip-out rate, a kind of insulated tower head and cross arms are used in 10kV overhead distribution lines, which may lead to the increase of lightning surge amplitude and create hazards to the equipment in substations. It's crucial to analyze the insulation coordination of 10kV substations under such condition. In this paper, an EMTP model for a 10kV distribution line and substation is developed. The lightning surges and influence factors on mean time between failure (MTBF) of substation are analyzed. The results show that overvoltage on equipment of substation are greatly increased and the MTBF of main transformer and surge arrester are reduced and below the allowable limit after the use of insulated tower head and cross arms. The MTBF of main transformer are greatly influenced by the front time of lightning current, the peak current distribution and the pole grounding resistance. An additional arrester at the incoming line and the increase of absorption energy of arrester are adopted as the effective countermeasures to improve the insulation coordination of such 10kV substation.

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Section: Parameters Of 10kv Substationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impact of distribution line insulated tower head and cross arms on lightning surges in 10 kV substations

Jiang

et al. 2014

2014 International Conference on Lightning Protection (ICLP)

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“…Nowadays, the models of volt-time curves of insulators are based on leader development methods(LDM) [8], [9]. In the LDM methods, the electric discharge process includes two sections: streamer propagation, its time being T S and leader propagation, its duration being T L .…”

Section: Impulse Electric Strength Of Line Insulatorsmentioning

confidence: 99%

“…The corona is simulated with dynamic capacitance [9]. This model is connected between conductor and ground node.…”

Section: F Coronamentioning

confidence: 99%

Analysis of corona effect on lightning performance of HV overhead transmission line using ATP/EMTP

Astinfeshan

Gholami

Mohajeri

2012

2012 11th International Conference on Environment and Electrical Engineering

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This paper presents a model of lightning performance of a 400kV double circuit overhead transmission line using ATP/EMTP. Including the models of transmission line, tower surge response, footing impedance, impulse electric strength of line insulator and lightning stroke as well as corona, the paper introduces a comprehensive lightning transients study. Based on this model, the paper discussed the influence of corona on two transient phenomena known as back flashover and shielding failure. Keywords-lightning overvoltage; corona effect; ATP/EMTP; back flashover;sheilding failure I.

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“…Further important simulation details, concerning the backflashover analysis on HV transmission lines, can be found in Refs. [12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Monte Carlo method for estimating backflashover rates on high voltage transmission lines

Sarajčev

2015

Electric Power Systems Research

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Computer Modelling and Analysis of Lightning Surges in HV Substations due to Shielding Failure

Cited by 23 publications

References 12 publications

Impact of distribution line insulated tower head and cross arms on lightning surges in 10 kV substations

Impact of distribution line insulated tower head and cross arms on lightning surges in 10 kV substations

Analysis of corona effect on lightning performance of HV overhead transmission line using ATP/EMTP

Monte Carlo method for estimating backflashover rates on high voltage transmission lines

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