Application possibilities of special lightning protection systems of overhead distribution and transmission lines

Banjanin, Mladen

doi:10.1016/j.ijepes.2018.03.006

Cited by 27 publications

(6 citation statements)

References 13 publications

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“…Therefore, several lightning protection systems such as surge arresters, shield wires, etc. were applied in the field and considered in the research activities [6]. Surge arresters represented the most applied overvoltage protection system against the lightning strokes.…”

Section: Introductionmentioning

confidence: 99%

Limiting surge arrester failure under direct lightning strokes for attaining service continuity of distribution networks

Sabiha

2020

IET Generation, Transmission & Distribution

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Section: Introductionmentioning

confidence: 99%

Limiting surge arrester failure under direct lightning strokes for attaining service continuity of distribution networks

Sabiha

2020

IET Generation, Transmission & Distribution

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“…In order to reduce lightning failure, it is necessary to conduct field investigation on the transmission lines and conduct comprehensive analysis based on the actual conditions such as line channel, landform and lightning density. By adopting new lightning protection devices [16], differentiated lightning protection transformation is carried out pertinently. Unbalanced insulation technology is adopted for the double circuit in the same tower to avoid the double circuit trip at the same time.…”

Section: Measures and Suggestions To Prevent Transmission Line Trimentioning

confidence: 99%

Fault Statistics and Analysis of 220-kV and Above Transmission Lines in a Southern Coastal Provincial Power Grid of China

Chen

2020

IEEE Open J. Power Energy

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Because the causes of transmission line faults are not known clearly at present, this paper proposes fault classification for transmission lines, and analyses the characteristics of different faults. Using the transmission line faults data of southern coastal provincial power grid from 2007 to 2018, this paper analyses the influence and distribution of transmission line faults affected by lightning, typhoon, wildfire, foreign object and external damage. These five faults are the main factors affecting the safe and stable operation of transmission lines in this region. According to the different fault classification and statistical rules, the design standards for important transmission lines should be improved. Considering the factors of micro-topography, micro-meteorology and engineering cost, the inspection and maintenance of existing lines should be strengthened. The statistics and analysis will be helpful to the research, development and application of new theories, new technologies and new equipment in disaster prevention and reduction from the aspects of disaster prediction and monitoring.

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“…More often than not, guy wires are used in the dead-end, transformer poles and also in the angles of the line route. Guy wire is modeled by an equivalent constant parameter (CD) line model with a surge impedance of 450 Ω [38,39]. Guy wire earthing system can be modeled as a constant resistance since the current conducted through this wire is relatively low and does not initiate the soil ionization [40].…”

Section: Guy Wirementioning

confidence: 99%

“…However, in this work, due to considering the arsenic-impregnated pole under the wet condition, which has a relatively low resistance, the earthing system described in Section 2.5 is used. The distance of the guy wire from the metallic part of the cross arm is 2 m. It is worth mentioning that, for the guy wire earthing system, the footing resistance is considered to be 40 times higher than the pole grounding resistance [38].…”

Section: Guy Wirementioning

confidence: 99%

Optimized Protection of Pole-Mounted Distribution Transformers against Direct Lightning Strikes

2020

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Direct lightning strikes on overhead phase conductors result in high overvoltage stress on the medium voltage (MV) terminals of pole-mounted transformers, which may cause considerable damage. Therefore, introducing an efficient protection strategy would be a remedy for alleviating such undesirable damages. This paper investigates the optimized protection of MV transformers against direct lightning strikes on the phase conductors. To this end, first, the impacts of grounding densities (number of grounded intermediate poles between every two successive transformer poles) on the probability of overvoltage stress on transformer terminals are investigated. Then, the implications of guy wire, as a supporting device for ungrounded intermediate poles, on reducing the overvoltage stress on transformers, are studied. Finally, the role of a surge arrester in mitigating the overvoltage stress of non-surge-arrester-protected transformer poles is scrutinized. The investigations are conducted on a sample MV network with 82 wood poles comprising 17 pole-mounted transformers protected by spark gaps. To provide in-depth analysis, two different poles, namely creosote- and arsenic-impregnated poles, are considered under wet and dry weather conditions. A sensitivity analysis is performed on grounding distances and on a combination of guy wire and grounded intermediate poles while taking into account soil ionization. The results provide a clear picture for the system operator in deciding how many grounded intermediate poles might be required for a system to reach the desired probabilities of transformers experiencing overvoltage stress and how the surge arrester and guy wires contribute to mitigating undesirable overvoltage stress.

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Application possibilities of special lightning protection systems of overhead distribution and transmission lines

Cited by 27 publications

References 13 publications

Limiting surge arrester failure under direct lightning strokes for attaining service continuity of distribution networks

Limiting surge arrester failure under direct lightning strokes for attaining service continuity of distribution networks

Fault Statistics and Analysis of 220-kV and Above Transmission Lines in a Southern Coastal Provincial Power Grid of China

Optimized Protection of Pole-Mounted Distribution Transformers against Direct Lightning Strikes

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