ZHAO Qingbin, HUANG Shi, YAN Duifeng, et al. Calculation of Short-circuit Current and Transient Recovery Voltage for Circuit-breakers Intended for Controlled Switching During T100a Test[J]. High voltage apparatus, 2024, 60(3): 80-86.
DOI:
ZHAO Qingbin, HUANG Shi, YAN Duifeng, et al. Calculation of Short-circuit Current and Transient Recovery Voltage for Circuit-breakers Intended for Controlled Switching During T100a Test[J]. High voltage apparatus, 2024, 60(3): 80-86. DOI: 10.13296/j.1001-1609.hva.2024.03.010.
Calculation of Short-circuit Current and Transient Recovery Voltage for Circuit-breakers Intended for Controlled Switching During T100a Test
the increase of asymmetry degree of major loop current for T100a test of circuit-breaker intended for controlled switching leads to the parameters of current and transient recovery voltage (
TRV
) provided in IEC 62271-101:2021 appendix A and E not to be applicable any longer. In order to calculate these parameters quickly and accurately
it is proposed in this paper such method that takes the short circuit current symmetrical component as the foundation to calculate current parameters and obtain the
TRV
correction coefficient through the time-domain analysis
which is of simpleness
high efficiency
flexibility and wide application range. Its calculation result and the calcualtion value by the traditional formula are in agreement
and are also recognized by IEC WG67 as well as included in appendix N of IEC TS 62271-319 (DTS).