Title :
A study on AC voltage aging characteristic of ZnO varistor by TSC
Author :
Tu, Youping ; He, Jie ; Wang, Qian ; Ding, Lijian
Author_Institution :
Beijing Key Lab. of High Voltage, North China Electr. Power Univ., Beijing, China
Abstract :
ZnO varistors are highly non-ohmic resistor and they are widely utilized in protecting electric power transmission line and electronic device against the dangerous overvoltage or voltage surge, and the AC voltage aging characteristic of ZnO varistors is one of the most concerning performance parameters. In this paper, the thermally stimulated current (TSC) performance of ZnO samples has been investigated before and after an accelerated aging test, which was prepared with a common formula. The experimental results show that with the increasing of aging time, the temperature corresponding to TSC peak increases slowly and the trap level becomes deeper, in addition to, the TSC current peak volume and the trapped charges increase markedly.
Keywords :
ageing; power transmission lines; power transmission protection; varistors; zinc compounds; AC voltage aging characteristic; ZnO; electric power transmission line protection; electronic device; nonohmic resistor; thermally stimulated current; varistor; voltage surge; Accelerated aging; Arresters; Manufacturing industries; Space charge; Surge protection; Temperature; Testing; Varistors; Voltage control; Zinc oxide; TSC; ZnO varistor; ions immigration;
Conference_Titel :
Properties and Applications of Dielectric Materials, 2009. ICPADM 2009. IEEE 9th International Conference on the
Conference_Location :
Harbin
Print_ISBN :
978-1-4244-4367-3
Electronic_ISBN :
978-1-4244-4368-0
DOI :
10.1109/ICPADM.2009.5252304
