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2012•IEEE Transactions on Dielectrics and Electrical InsulationRequires access

Analysis of very fast transient overvoltages (VFTO) from onsite measurements on 800 kV GIS

Yunge Li, Yong Shang, Lin Zhang, Rongpei Shi, Wei Shi

Open publisher page 43 citations

Abstract

In IEC 60071-1 and 62271-102, there is neither standard voltage shape nor standard peak value for very fast transient overvoltages (VFTO). Previous work by other researchers had classified VFTO into two types. A new type was identified in this paper based on an onsite test on a commercially-operated 800 kV GIS. Disconnectors were opened/closed under real operation conditions. Characteristics of the new VFTO type were analyzed, including times of the arc restrikes between the contacts of the disconnectors, trapped charge, damping time constant, magnitude, rise rate, and oscillating frequency. The results of this paper are expected to be of help for the completion of standards on VFTO.

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What this paper is about

In IEC 60071-1 and 62271-102, there is neither standard voltage shape nor standard peak value for very fast transient overvoltages (VFTO). Previous work by other researchers had classified VFTO into two types. A new type was identified in this paper based on an onsite test on a commercially-operated 800 kV GIS. Disconnectors were opened/closed under real operation conditions. Characteristics of the new VFTO type were analyzed, including times of the arc restrikes between the contacts of the disconnectors, trapped charge, damping time constant, magnitude, rise rate, and oscillating frequency. The results of this paper are expected to be of help for the completion of standards on VFTO.

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OpenAlex reports 43 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

In IEC 60071-1 and 62271-102, there is neither standard voltage shape nor standard peak value for very fast transient overvoltages (VFTO). Previous work by other researchers had classified VFTO into two types. A new type was identified in this paper based on an onsite test on a commercially-operated 800 kV GIS. Disconnectors were opened/closed under real operation conditions. Characteristics of the new VFTO type were analyzed, including times of the arc restrikes between the contacts of the disconnectors, trapped charge, damping time constant, magnitude, rise rate, and oscillating frequency. The results of this paper are expected to be of help for the completion of standards on VFTO.

Key concepts: Transient (computer programming), Overvoltage, Voltage, Transient analysis, Electrical engineering, Materials science, Electronic engineering, Engineering

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