TY - GEN
T1 - Quantum Chemistry Computing to analyze the Gas Generation Mechanism in Ester Insulating Oils
AU - Kato, Masamichi
AU - Matsumoto, Satoshi
N1 - Publisher Copyright:
© 2020 IEEE.
PY - 2020/6
Y1 - 2020/6
N2 - The thermal decomposition mechanism of ester insulating oil was investigated using quantum chemistry computing. The bond dissociation energy of each ester's molecular bond was calculated, activate energy for generation radicals estimated. Gibbs free energy difference before and after bond dissociation was calculated at 300, 400, 500, 600, and 700°C. The reaction rate at each temperature was evaluated, and the ratio of each radical was estimated. Furthermore, the reaction pathway in which radicals generate gases (H2, CH4, C2H6, C2H4, C2H2) used in DGA was searched by transition state (TS) search and intrinsic reaction coordinate (IRC) analyzing. Finally, the Gibbs free energy for these reaction pathways was calculated and the gas generation rate at each temperature was estimated. Calculated gas generation characteristic trends are consistent with the data of local heating experiments previously reported.
AB - The thermal decomposition mechanism of ester insulating oil was investigated using quantum chemistry computing. The bond dissociation energy of each ester's molecular bond was calculated, activate energy for generation radicals estimated. Gibbs free energy difference before and after bond dissociation was calculated at 300, 400, 500, 600, and 700°C. The reaction rate at each temperature was evaluated, and the ratio of each radical was estimated. Furthermore, the reaction pathway in which radicals generate gases (H2, CH4, C2H6, C2H4, C2H2) used in DGA was searched by transition state (TS) search and intrinsic reaction coordinate (IRC) analyzing. Finally, the Gibbs free energy for these reaction pathways was calculated and the gas generation rate at each temperature was estimated. Calculated gas generation characteristic trends are consistent with the data of local heating experiments previously reported.
KW - DGA
KW - Dissolved gas analysis
KW - Ester insulating oil
KW - Quantum chemistry computing
KW - Transformer
UR - http://www.scopus.com/inward/record.url?scp=85092157283&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85092157283&partnerID=8YFLogxK
U2 - 10.1109/EIC47619.2020.9158757
DO - 10.1109/EIC47619.2020.9158757
M3 - Conference contribution
AN - SCOPUS:85092157283
T3 - 2020 IEEE Electrical Insulation Conference, EIC 2020
SP - 157
EP - 162
BT - 2020 IEEE Electrical Insulation Conference, EIC 2020
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2020 IEEE Electrical Insulation Conference, EIC 2020
Y2 - 22 June 2020 through 3 July 2020
ER -