考虑湿度气压影响的瓷绝缘子沿面类辉光放电仿真及其紫外光谱特性分析  

Simulation and Ultraviolet Spectral Characteristics of Glow-Like Discharge Along the Surface of Porcelain Insulators Considering the Influences of the Humidity and Atmospheric Pressure

作　　者：李泳霖 黄世龙[1,2] 刘云鹏[1,2] 耿江海[1,2] 牛雷雷 Li Yonglin;Huang Shilong;Liu Yunpeng;Geng Jianghai;Niu Leilei(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University,Beijing 102206 China;Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense North China Electric Power University,Baoding 071003 China)

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206 [2]华北电力大学河北省输变电设备安全防御重点实验室,保定071003

出　　处：《电工技术学报》2023年第7期1956-1969,共14页Transactions of China Electrotechnical Society

基　　金：国家重点研发计划资助项目(2018YFF01011900)。

摘　　要：为研究湿度和气压对瓷绝缘子沿面类辉光放电日盲紫外波段光辐射的影响机制,结合试验和仿真模型,从宏观、微观两个角度分析了湿度和气压对放电点日盲紫外波段光辐射产生过程的影响特性。该文首先搭建了污秽瓷绝缘子放电试验平台,利用光谱仪测量了不同湿度和气压下240~280 nm日盲紫外波段的放电发射光谱。根据发射光谱的特征谱线,确定了放电时产生日盲紫外波段光辐射的激发态N2和NO分子的具体退激跃迁反应。基于试验,利用有限元软件建立了瓷绝缘子沿面类辉光放电的二维仿真模型,主要考虑了25种粒子和37个化学反应,其中包括与产生日盲紫外波段光辐射有关的2种激发态粒子及9个相关化学反应。在模型中分别改变湿度和气压,得出了2种激发态粒子的粒子数密度及生成速率的变化特性,与试验中不同湿度和气压下的日盲紫外波段光辐射强度的变化特性进行对比分析可知,湿度、气压通过影响2种激发态粒子的产生与淬灭过程,改变了光辐射的强度。Changes in environmental factors may exert significant influences on the ultraviolet(UV)imaging detection results of discharge on polluted porcelain insulators and then affect the accuracy of subsequent UV detection results.This makes it necessary to analyze influences of environmental factors on UV discharge detection of polluted porcelain insulators.Studying the surface air discharge process using a numerical simulation model can describe the macroscopic discharge process;It also can explain problems including the formation,diffusion,migration,and disappearance of key particles in the discharge process from a more microscopic perspective.However,existing research using a simulation model for surface discharge seldom focuses on particles that induce light radiation in the solar-blind UV region in the discharge process and chemical reaction of these particles.In view of this,influences of the humidity and atmospheric pressure on the formation process of light radiation in the solar-blind UV region during glow-like discharge along the surface of porcelain insulators were evaluated from macroscopic and microscopic perspectives by combining the tests and a simulation model.A discharge test platform for polluted porcelain insulators was established,then,a spectrograph was used to acquire emission spectra of glow-like discharge in the solar-blind UV region(240 to 280 nm)under different humidifies and atmospheric pressures.Thereafter,a two-dimensional(2D)simulation model for glow-like discharge along the surface of porcelain insulators in the humid air was established using finite element software according to the test parameters and spectral analysis results.Changes in the number density and rate of formation of microscopic particles in the discharge area were obtained through simulation.Finally,the test analysis and simulation results were integrated to reveal the mechanisms causing changes in light radiation intensity in the solar-blind UV region under different humidifies and atmospheric pressures.Analysis of emiss

关 键 词：湿度和气压 瓷绝缘子沿面类辉光放电 日盲紫外波段光辐射 发射光谱 二维仿 真模型 

分 类 号：O461[理学—电子物理学] O433.4[理学—物理]