TY - GEN
T1 - Distinct Initiation Processes of Vacuum Flashover under Non-Uniform Field
T2 - 2nd International Conference on Electrical Materials and Power Equipment, ICEMPE 2019
AU - Sun, G. Y.
AU - Yang, N.
AU - Zhang, S.
AU - Guo, B. H.
AU - Zhou, R. D.
AU - Zhou, C. H.
AU - Zhang, G. J.
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/4
Y1 - 2019/4
N2 - Vacuum flashover commonly appears over dielectric material, deteriorating reliability and longevity of electrical equipment. We present two distinctive modes where flashover initiates from cathode or anode, with fundamentally different mechanisms and discharge developments. Simulation and theories are provided, corroborated by experimental results of detected optical characteristics. The cathode-initiated flashover (CIF) is due to a multipactor formed over surface which then induces outgassing and a low pressure gas discharge. The anode-initiated flashover (AIF), on the other hand, is triggered by partial leakage near anode triple junction due to strong vertical field, which then fuels the discharge with two ionization zones starting from both junctions to converge. A multiphase framework is given conceptually to combine both CIF and AIF. Their relations with field distribution, beam injection are clarified as well.
AB - Vacuum flashover commonly appears over dielectric material, deteriorating reliability and longevity of electrical equipment. We present two distinctive modes where flashover initiates from cathode or anode, with fundamentally different mechanisms and discharge developments. Simulation and theories are provided, corroborated by experimental results of detected optical characteristics. The cathode-initiated flashover (CIF) is due to a multipactor formed over surface which then induces outgassing and a low pressure gas discharge. The anode-initiated flashover (AIF), on the other hand, is triggered by partial leakage near anode triple junction due to strong vertical field, which then fuels the discharge with two ionization zones starting from both junctions to converge. A multiphase framework is given conceptually to combine both CIF and AIF. Their relations with field distribution, beam injection are clarified as well.
UR - https://www.scopus.com/pages/publications/85067901804
U2 - 10.1109/ICEMPE.2019.8727253
DO - 10.1109/ICEMPE.2019.8727253
M3 - 会议稿件
AN - SCOPUS:85067901804
T3 - ICEMPE 2019 - 2nd International Conference on Electrical Materials and Power Equipment, Proceedings
SP - 182
EP - 186
BT - ICEMPE 2019 - 2nd International Conference on Electrical Materials and Power Equipment, Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
Y2 - 7 April 2019 through 10 April 2019
ER -