How the switching-surge family affects line insulation

Kalb, J. W.

doi:10.1109/ee.1963.6541405

Cited by 7 publications

(2 citation statements)

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“…Time-to-flashovers for SI voltages were observed to be between 150-350 µs time range, where the positive impulses gave lower values. The test results were in concordance with the flashovers times reported in [15,21].…”

Section: Wet Test Conditionssupporting

confidence: 88%

Impacts of corona rings on the insulation performance of composite polymer insulator strings

İlhan

Özdemir

Ismailoglu

2015

IEEE Trans. Dielect. Electr. Insul.

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Corona rings can improve the insulation performance of insulator strings because of their electric field grading property or can decrease the insulation performance due to their arc clearance reduction property. The resulting insulation performance of the string which is under the influence of those two conflicting effects depends on the corona ring parameter settings. Therefore, a detailed experimental work is required to determine the insulation performance for different types of test voltages under different ambient conditions. This paper presents the results of experimental studies regarding the effects of corona rings on the insulation performance of 380 kV non-ceramic V-insulator strings. Those effects and flashover routes were determined for lightning impulses, switching impulses and AC voltages. Corona ring diameter, corona tube diameter, and mounting height were selected as the ring design parameters. Experimental studies were performed for the strings including corona rings of different design parameters as well as for the ring free strings. Test results were discussed from discharge development physics point of view and optimal configuration was determined for the strings.

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Section: Wet Test Conditionssupporting

confidence: 88%

Impacts of corona rings on the insulation performance of composite polymer insulator strings

İlhan

Özdemir

Ismailoglu

2015

IEEE Trans. Dielect. Electr. Insul.

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“…The switching impulses are oscillatory in nature, due to inductance associated with a transformer, a machine, or a line, and the capacitance of the line or cable. Because of the complex nature of the network in a system, the switching impulse may have more than one frequency superimposed in these switching transients, and the rate at which these oscillations die down depends on the resistance and other losses in the system that reduce the transient to zero until a steady state is reached [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Oscillatory Switching Impulse Flashover Characteristics of Insulator Strings under Normal Weather Conditions

Jayaraju¹,

Nair²,

Prabhakar

2003

Electric Power Components and Systems

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Recent investigations have shown the occurrence of nonstandard impulse waveforms on power systems, such as double exponential waves having different front and tail times, linearly rising over voltages, and oscillatory switching impulse voltages (OSIV). This article describes the flashover study of standard disc type insulators, under the application of unidirectional and bidirectional oscillatory switching impulse voltages in normal weather conditions. This helps in understanding the performance of power transmission lines with oscillatory switching impulse voltages.

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Analysis of the Dielectric Characteristics of Gaseous Nitrogen According to Various Temperatures and Pressures for a Magnet System

Nam

Lee

et al. 2016

J Supercond Nov Magn

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How the switching-surge family affects line insulation

Cited by 7 publications

References 0 publications

Impacts of corona rings on the insulation performance of composite polymer insulator strings

Impacts of corona rings on the insulation performance of composite polymer insulator strings

Oscillatory Switching Impulse Flashover Characteristics of Insulator Strings under Normal Weather Conditions

Analysis of the Dielectric Characteristics of Gaseous Nitrogen According to Various Temperatures and Pressures for a Magnet System

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