Suppression Mechanism of TiO2 for the Partial Discharge of Oil-paper Insulation in Intensive Electric Field
Paper in proceedings, 2019

With the rapid development of modern HVDC transmission technology, higher insulation properties are put forward on the oil-paper insulation system of the transformer, which determine the transformer service life to a certain extent. Traditional transformer oil-paper insulation is becoming increasingly difficult to meet the demands of insulation system with large capacity and miniaturization at ultra-high voltage level. In order to improve the insulation strength of oil-paper system, the insulation cellulose paper modified by TiO2 nanoparticles of different diameters (5 nm, 10 nm, 20 nm, 30 nm) were prepared, in addition, each of modified cellulose paper has different mass fraction of TiO2 nanoparticles (1%, 3%, 5%, 7% wt.). The partial discharge (PD) detection platform was established, and the partial discharge inception voltage (PDIV) values of the oil-paper insulation system with and without nanoparticles were measured. To investigate the PD characteristics, the PD waveforms and PD frequency spectrums of modified cellulose paper and the unmodified were obtained. The suppression mechanism of TiO2 nanoparticles on PD was explored through scanning electron microscope (SEM) observation. All the experiment results indicate that adding nano-TiO2 is beneficial to enhance the insulation properties of oil-paper insulation, and the optimum diameter and mass fraction of TiO2 nanoparticles to suppress oil-paper PD were obtained.

Partial discharge


Insulation system



Daosheng Liu

Jiangxi University of Science and Technology

Yajie Wu

Jiangxi University of Science and Technology

Xiangdong Xu

Chalmers, Electrical Engineering, Electric Power Engineering, Power grids and Components

Jing Ye

Jiangxi University of Science and Technology

Jiachen Li

Jiangxi University of Science and Technology

Shangqun Yu

Sanbian Sci.-Tech. Co., Ltd

Xiaolong Li

Shenyang University of Technology

Proceedings - IEEE International Conference on Dielectric Liquids

21533725 (ISSN) 21533733 (eISSN)

Vol. 2019-June 8796771

20th IEEE International Conference on Dielectric Liquids, ICDL 2019
Roma, Italy,

Subject Categories

Paper, Pulp and Fiber Technology

Other Engineering and Technologies not elsewhere specified

Other Electrical Engineering, Electronic Engineering, Information Engineering



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