An Analysis of Reducing Back Flashover Faults with Surge Arresters on 69/138 kV Double Circuit Transmission Lines Due to Direct Lightning Strikes on the Shield Wires

Malcolm, Newman; Aggarwal, R.K.

doi:10.1049/cp.2014.0070

Cited by 10 publications

(9 citation statements)

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“…Several methods have been proposed to keep failure rates low and to avoid damage and disturbance to the OHTL system. These methods include improving tower footing resistance, installing earth wires, and transmission lightning arrester (TLA) installation [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Transmission Lightning Arrester Locations Using Tflash

et al. 2016

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Section: Introductionmentioning

confidence: 99%

Analysis of Transmission Lightning Arrester Locations Using Tflash

et al. 2016

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“…Recently, surge arresters (SA) are implemented on the line to reduce LTR. Some studies used Electromagnetic Transient Program (EMTP) software to analyze the impact of lightning strike on the line [12][13][14][15][16][17][18] and to evaluate the impact of surge arrester and tower footing resistance [14][15][16] on the lightning performance. In fact, to reduce LTR of a transmission line, the SA installation at all towers of a line is almost impossible because of high cost of SA.…”

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confidence: 99%

Reduction of the number of faults caused by lightning for transmission line

Phan

2019

IJECE

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In this paper, author proposed an algorithm to determine method which is used to reduce the fault number caused by lightning on a transmission line. The algorithm is developed based on three methods including increase in the insulator string length, surge arrester installation, and surge arrester installation in combination with increase in the insulator string length. The output of algorithm is the proposed method which makes the number of faults caused by lightning satisfy the requirement and its investment is the cheapest in them. Based on this algorithm, the reasonable method (the number of tower positions needing to improve) to reduce the number of lightning caused faults of the transmission line can determine if we know the ratio of the required number lightning caused faults to the current value. This algorithm is applied to a transmission line to propose an improving method so that the fault number satisfies the requirement. This algorithm is implemented to a 220kV transmission line. The calculation results show the reasonable method and it also indicates in detail which towers should install surge arrester, which towers should increase the insulator string length.

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“…It was stated in [5] that both the first and subsequent lightning strokes have resulted in flashover of insulators on 69 kV and 138 kV transmission towers. Likewise, lightning is one of the main contributing factors for trip-out rate on the 69 kV and 138 kV transmission lines in Jamaica [6]. It must be emphasized that high voltage transmission lines with lower voltage levels such as 69 kV and 138 kV are very vulnerable to insulators flashover because of their relatively low critical impulse flashover voltage (CFO) ratings [6,7].…”

mentioning

confidence: 99%

“…Likewise, lightning is one of the main contributing factors for trip-out rate on the 69 kV and 138 kV transmission lines in Jamaica [6]. It must be emphasized that high voltage transmission lines with lower voltage levels such as 69 kV and 138 kV are very vulnerable to insulators flashover because of their relatively low critical impulse flashover voltage (CFO) ratings [6,7]. Hence, lightning strokes terminating directly onto these lines are likely to cause flashover of the insulators.…”

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Assessment of shielding performance of 69/138 kV transmission lines exposed to lightning strikes

Malcolm

Aggarwal

2015

2015 IEEE Power &Amp; Energy Society General Meeting

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Lightning is the leading cause of power interruptions on overhead transmission lines. The insulators used on overhead 69 kV and 138 kV transmission lines are likely to flashover whenever there is a direct lightning strike on the phase conductors due to their relatively low insulation levels. However, significant improvement can be achieved with the appropriate design of transmission line tower structures. This paper presents an analysis of the shielding failure flashover rate (SFFOR) occurrence on both 69 kV and 138 kV transmission tower lines and tower structures. This analysis is based on an electrogeometrical model recommended by the IEEE Standards 1243:1997.The analysis accounts for the striking distance of the geometry of the transmission lines and tower structures, the critical impulse flashover voltage (CFO) of the insulators, the statistical distribution of lightning current parameters and the keraunic level of the location of the lines. The proposed assessment is supported by the recommendations of CIGRE TB 549 (2013) for lightning parameters, which define the statistical distributions of lightning current parameters. The results show that shielding angle lower than 30 degrees predicts substantially lower SFFOR. Also, insulators with higher CFO ratings contribute to lower SFFOR. The analysis presented, therefore, could be applied to the design of high voltage transmission line support structures. Index Terms-Critical impulse flashover voltage, Lightning protection, Shielding failure flashover rate, Transmission line towers, Surge protection device I.

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An Analysis of Reducing Back Flashover Faults with Surge Arresters on 69/138 kV Double Circuit Transmission Lines Due to Direct Lightning Strikes on the Shield Wires

Abstract: analysis of reducing back flashover faults with surge arresters on 69/138 kV double circuit transmission lines due to direct lightning strikes on the shield wires'

Cited by 10 publications

References 0 publications

Analysis of Transmission Lightning Arrester Locations Using Tflash

Analysis of Transmission Lightning Arrester Locations Using Tflash

Reduction of the number of faults caused by lightning for transmission line

Assessment of shielding performance of 69/138 kV transmission lines exposed to lightning strikes

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