Study on the ageing of insulators based on the surface charge accumulation process

The Journal of Engineering

Wang Zhitao¹  Zhao Zhunrong¹  Ma Shuai¹  Li Qingquan²  Ren Ang²  Gao Yaochong²  Wang Peijin² 

[1] Laiwu Power Supply Company, State Grid Shandong Electric Power Company;

[2] Shandong Provincial Key laboratory of UHV Transmission Technology and Equipment School of Electrical Engineering, Shandong University;

关键词: plasma simulation;    surface discharges;    insulators;    surface charging;    Monte Carlo methods;    space charge;    plasma transport processes;    plasma collision processes;    ionisation;    plasma temperature;    surface charge accumulation process;    air tower insulator;    charge distribution;    two-dimensional mixed numerical model;    insulator string;    chemical reaction;    space charge generation mechanism;    Monte Carlo collision rule;    simulation model;    ionisation reaction;    umbrella skirt surface ions;    surface discharge;    ageing;    transient motion;    air discharge particle transport;    electron temperature;    reaction rate;    dynamic equilibrium;   

DOI  :  10.1049/joe.2018.8914

来源: DOAJ

【 摘 要 】

In order to study the transient motion of the space charge around the air tower insulator and the charge distribution of the insulator, a two-dimensional mixed numerical model of the insulator string based on chemical reaction is proposed. The simulation is used to obtain the space charge generation mechanism and its distribution on the insulator surface. The chemical reaction of particles mainly involves ionisation and recombination. Based on the simulation model, it is found that the accumulation of electrons on the surface of the insulation is the main reason for the distortion of the surface of the insulator. With the increase of the discharge time, the electron temperature decreases and the reaction rate decreases. The ionisation reaction gradually reaches the dynamic equilibrium. The umbrella skirt under the surface of the ion to stabilise the moment to be earlier than the umbrella skirt surface ions to achieve the steady state of the moment. A numerical model of air discharge based on Monte Carlo collision is proposed, which can well simulate the distribution of charge around the insulator of atmospheric tower. It is very important to study the phenomenon of the insulator along the surface discharge.

【 授权许可】

Unknown