Open AccessCorona characteristics of conductor with TiO 2 hydrophilic film subjected to DC high voltage
Author(s) -
Bian Xingming,
Lin Yaoyu,
Pi Xinan,
Lu Tiebing,
Xu Feifei,
Li Haibing,
Ma Yanxiang
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.8424
Subject(s) - conductor , materials science , corona (planetary geology) , corona discharge , voltage , high voltage , electrical engineering , optoelectronics , engineering physics , composite material , physics , engineering , astrobiology , venus
Water drops on the surface of conductors influence the ambient electric fields and decrease corona inception voltage. A conductor coated with TiO 2 film was developed to prevent effects of droplets. The corona inception voltage of conductors in different conditions was measured. The experiments were designed to study effects of three factors including UV‐light, the position of water drops, and mass fraction of TiO 2 on corona discharge. The influences on the three factors to the corona inception discharge were summarised. Different processes of corona occurred when a water drop on upper or lower surface of the conductor. The contact angle is smaller when the conductor is coated with the paint containing TiO 2 because TiO 2 is hydrophilic under UV‐light. UV‐light can improve TiO 2 's hydrophilia. The ingredients of the paint are insulated. These ingredients prevent the adsorption of space charge and enlarge ionisation layers, thus the corona discharge will be restrained. With the increase of TiO 2 's mass fraction under the UV‐light, the impact of water drops to discharge is further inhibited and the corona inception discharge voltage is increased.