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Theoretical analysis of transient recovery voltages when clearing a transformer secondary fault
Author(s) -
Ametani Akihiro,
Kuroda Nobuhiro,
Tanimizu Toru,
Hasegawa Hiroshi,
Inaba Hideki
Publication year - 2001
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/1520-6416(200102)134:3<44::aid-eej6>3.0.co;2-s
Subject(s) - transient recovery voltage , circuit breaker , transformer , emtp , transient (computer programming) , interrupt , voltage , transient analysis , electrical engineering , crest , engineering , mechanics , control theory (sociology) , transient response , physics , materials science , computer science , voltage regulator , optics , electric power system , dropout voltage , thermodynamics , power (physics) , control (management) , transmission (telecommunications) , artificial intelligence , operating system
An analytical formula for the transient recovery voltage and its derivative dv/dt across a circuit breaker has been derived for the case of a transformer secondary fault. A comparison of the calculated results with field test and EMTP simulation results has demonstrated it to have satisfactory accuracy. By applying the formula, the effects of various circuit parameters on the transient recovery voltage and its derivative dv/dt are elucidated. The derivative dv/dt , defined conventionally as the ratio of the crest value and the time to the crest, is found to be about two‐thirds of the maximum value of dv/dt given as a function of time. In addition, a formula for the critical circuit parameters at which dv/dt across a vacuum circuit breaker reaches the critical condition, that is, the circuit breaker fails to interrupt a fault current, is derived. © 2000 Scripta Technica, Electr Eng Jpn, 134(3): 44–52, 2001