Statistical characteristics and mechanism analysis of adhered particle on surface under strong electric field--颗粒学报PARTICUOLOGY

Jiang, Y., Li, L., Lu, M., Wang, R., Jiang, Y., Liu, S., & Su, C. (2019). Statistical characteristics and mechanism analysis of adhered particle on surface under strong electric field. Particuology, 43, 110-122. https://doi.org/10.1016/j.partic.2018.03.016

Statistical characteristics and mechanism analysis of adhered particle on surface under strong electric field

Yunpeng Jiang ^a, Lee Li ^a *, Ming Lu ^b, Rumeng Wang ^a, Yiwen Jiang ^a, Shanfeng Liu ^b, Chao Su ^c

a State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science & Technology, Wuhan 430074, China
b State Grid Henan Electric Power Research Institute, Zhengzhou 450052, China
c Qingyuan Power Supply Bureau of Guangdong Power Grid Corporation, Guangdong 511515, China

10.1016/j.partic.2018.03.016

Volume 43, April 2019, Pages 110-122

Received 21 June 2017, Revised 16 March 2018, Accepted 29 March 2018, Available online 9 October 2018, Version of Record 19 February 2019.

E-mail: leeli@hust.edu.cn

Highlights

• Particle diameter distribution on the insulator surface with strong electric field was measured.

• A collision model was established in order to analyze the trajectory of particles.

• Relative humidity and wind speed have an obvious effect on the adhesion of particles.

• The particle diameter distribution of adhered particles shows significant concentration.

• The higher relative humidity is, the more the adhered particles are.

Abstract

Insulators on high-voltage transmission lines are almost the only man-made structures on the Earth’s surface intended for long-term operation under strong electric fields. After samples of natural contaminant particles were collected from insulator surfaces in China, it was found that the particle diameter distribution (PDD) was mainly concentrated in the 5–50 μm range. To analyze the statistical characteristics of these particles, this work studies the physical processes of particle collision and adhesion using the theories of hydrodynamics and collision dynamics. The physical model considers coupling of the fluid field and the electric field, introduces an adhesion criterion, and establishes a particle and surface collision model. The effects of relative humidity, wind speed, aerodynamic shape, electric field type, and electric field strength on particle adhesion were analyzed. The results show that the relative humidity and wind speed have very significant effects and the influences of the electric field type and the electric field strength are obvious, but the influence of the aerodynamic shape is relatively weak. The simulation results support the statistical characteristics determined in this work. The physical model established here provides reference values for study of the adhesion characteristics of particles on surfaces under electric fields.

Graphical abstract

Keywords

Contaminant particle; Collision; Adhesion; Particle diameter; Simulation analysis

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