TY - GEN
T1 - Influence of surface trap parameters on AC / DC flashover of epoxy resin
AU - Cai, Zhuoli
AU - Li, Mingru
AU - Wang, Weiwang
AU - Min, Daomin
AU - Li, Shengtao
AU - Zhang, Liangxian
AU - Yang, Wei
AU - Chen, Yun
AU - Wang, Kun
N1 - Publisher Copyright:
© 2020 IEEE.
PY - 2020/9/6
Y1 - 2020/9/6
N2 - The surface flashover of electrical epoxy resin has been regarded as a key issue in high voltage insulation system. It is of great significance to study the influence factors on flashover properties of epoxy resin. Surface charge accumulation and decay is one of the key factors in flashover properties. In this paper, three types of epoxy resin samples, including CYD-128, DER-311 and 0164 were prepared, the influence of trap parameters of the epoxy resin samples on the surface flashover performance was investigated. Samples with a diameter of 50 mm and the thickness of 1 mm and 0.2 mm were prepared by the same curing procedure. Surface potential decay, DC surface flashover under SF6atmosphere, AC flashover in air under a standard atmospheric pressure were measured. The result shows that the sample DER-311 presented the highest deep trap energy level of 1.08eV. Its DC flashover voltage (33.56kV) and AC flashover voltage (6.37kV) had the lowest values. DC flashover voltage (34.56kV) of sample 0164 and its AC flashover voltage (7.46kV) are higher than that of sample DER-311. Sample CYD-128 has a proper deep trap energy level of 0.9geV and shallow trap density of 7.91×1022eV-1m-3and it had the highest flashover voltage. It is found that the flashover voltage decreased when the shallow trap density and the deep trap energy level increased. The deep trap captured a large number of electrons, leading to the surface charge accumulation. Meanwhile, the surface charges on the discharge path caused the electron avalanche and decrease in the flashover voltage. When the shallow trap density increased large enough, the migration of electrons on the sample surface becomes more easier, resulting in the decrease of the flashover voltage.
AB - The surface flashover of electrical epoxy resin has been regarded as a key issue in high voltage insulation system. It is of great significance to study the influence factors on flashover properties of epoxy resin. Surface charge accumulation and decay is one of the key factors in flashover properties. In this paper, three types of epoxy resin samples, including CYD-128, DER-311 and 0164 were prepared, the influence of trap parameters of the epoxy resin samples on the surface flashover performance was investigated. Samples with a diameter of 50 mm and the thickness of 1 mm and 0.2 mm were prepared by the same curing procedure. Surface potential decay, DC surface flashover under SF6atmosphere, AC flashover in air under a standard atmospheric pressure were measured. The result shows that the sample DER-311 presented the highest deep trap energy level of 1.08eV. Its DC flashover voltage (33.56kV) and AC flashover voltage (6.37kV) had the lowest values. DC flashover voltage (34.56kV) of sample 0164 and its AC flashover voltage (7.46kV) are higher than that of sample DER-311. Sample CYD-128 has a proper deep trap energy level of 0.9geV and shallow trap density of 7.91×1022eV-1m-3and it had the highest flashover voltage. It is found that the flashover voltage decreased when the shallow trap density and the deep trap energy level increased. The deep trap captured a large number of electrons, leading to the surface charge accumulation. Meanwhile, the surface charges on the discharge path caused the electron avalanche and decrease in the flashover voltage. When the shallow trap density increased large enough, the migration of electrons on the sample surface becomes more easier, resulting in the decrease of the flashover voltage.
KW - deep trap energy level
KW - shallow trap density
KW - surface flashover
KW - surface potential decay
UR - https://www.scopus.com/pages/publications/85099355813
U2 - 10.1109/ICHVE49031.2020.9279907
DO - 10.1109/ICHVE49031.2020.9279907
M3 - 会议稿件
AN - SCOPUS:85099355813
T3 - 7th IEEE International Conference on High Voltage Engineering and Application, ICHVE 2020 - Proceedings
BT - 7th IEEE International Conference on High Voltage Engineering and Application, ICHVE 2020 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 7th IEEE International Conference on High Voltage Engineering and Application, ICHVE 2020
Y2 - 6 September 2020 through 10 September 2020
ER -