An Accurate Evaluation of Switching Impulse Voltages for High-Voltage Tests

Peerawut Yutthagowith
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Peerawut Yutthagowith: School of Engineering, King Mongkut’s Institute of Technology Ladkrabang, 1 Chalongkrung Rd., Ladkrabang, Bangkok 10520, Thailand

Energies, 2022, vol. 15, issue 13, 1-10

Abstract: For assessment of the insulation performance of high-voltage (HV) equipment installed in extra-high-voltage (EHV) systems, switching impulse voltage tests are performed in an HV testing laboratory. The waveform parameters of the switching impulse voltages are defined by peak voltage ( U p ), time to crest ( T p ), and time to half ( T 2 ) according to IEC 60060-1. In this paper, a new, simplified, and accurate approach used for determination of the waveform parameters of the switching impulse voltages is presented. The formula used in the evaluation of T p was derived from analytically simulated two-exponential waveforms, where T p and T 2 are in the ranges of 20 ?s to 300 ?s and 1000 ?s to 4000 ?s, respectively. The accuracy of the proposed approach was validated by the waveforms collected from the test waveform data generator (TDG) provided by IEC 61083-2, simulations, and experiments. It is found that the accuracy of the proposed approach is relatively higher than the expressions provided by IEC 60060-1 and previously developed. The proposed method is an alternative and useful approach for evaluating the waveform parameters of the standard switching impulse voltage.

Keywords: evaluation of waveform parameters; high-voltage tests; insulation performance; switching impulse voltage (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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