水分子浓度对复合绝缘子电晕放电特性的影响研究  

Influence of Water Molecular Concentration on Corona Discharge Characteristics of Composite Insulator

作　　者：张靖 曾晗 程宏波 辛建波 王利娜 ZHANG Jing;ZENG Han;CHENG Hongbo;XIN Jianbo;WANG Lina(School of Electrical and Automation Engineering,East ChinaJiaotong University,Nanchang,330013,China;State Grid Jiangxi Electric Power Co.,Ltd.,Nanchang,330096,China)

机构地区：[1]华东交通大学电气与自动化工程学院,南昌330013 [2]国网江西省电力有限公司电力科学研究院,南昌330096

出　　处：《电瓷避雷器》2022年第2期167-174,182,共9页Insulators and Surge Arresters

基　　金：国家自然科学基金(编号:51867010)。

摘　　要：在湿热气候环境中复合绝缘子表面频发的电晕放电,会破坏绝缘子的绝缘性能。为了研究湿热环境中水分子浓度对复合绝缘子电晕放电特性的影响,采用二维数值模拟计算,仿真分析了水分子浓度对绝缘子电晕放电的电场强度、电子密度、电子温度和重粒子密度的影响。并通过氮氧环境中绝缘子电晕放电数据验证模型的准确性。通过分析仿真数据可知,在金具和曲率半径较大的伞裙边沿电子密度与水分子浓度呈负相关;阳极区域,电场强度随着水分子浓度的增加而缓慢增加,其他区域没有明显的变化;电子温度变化与电场强度的变化趋势相近;放电过程中N_(2)^(+)、O_(2)^(+)、N_(4)^(+)、O_(4)^(+)等离子密度随着水分子浓度的上升而减小,OH^(-)与·OH粒子密度随水分子浓度有小幅度波动。笔者提出的绝缘子在湿热环境下的电晕放电仿真符合实际工程情况,且对电晕放电的研究有着重要意义。The frequent corona discharge on the surface of composite insulators in humid and hot climate will damage the insulation performance of insulators. In order to study the influence of water molecular concentration on the characteristics of composite insulator corona discharge in humid and hot environment, two-dimensional numerical simulation was used to simulate and analyze the influence of water molecular concentration on the electric field intensity, the electronic number density, the electronic temperature and the influence of the heavy particle density on insulator corona discharge. The accuracy of the model is verified by insulator corona discharge data in nitrogen-oxygen environment. By analyzing the simulation data, it can be seen that the electron density is negatively correlated with the concentration of water molecules at the edge of the skirt with large gold and curvature radius. In the anode region, the electric field intensity increased slowly with the increase of water molecular concentration, but there was no significant change in other regions. The variation trend of electron temperature and electric field intensity is similar. In the discharge process, the plasma densities of N_(2)^(+), O_(2)^(+), N_(4)^(+)and O_(4)^(+)decreased with the increase of water molecular concentration, while the densities of OH^(-)and ·OH particles fluctuated slightly with water molecular concentration. The corona discharge simulation of insulators in humid and hot environment is in accordance with the actual engineering situation, and is of great significance to the study of corona discharge.

关 键 词：水分子浓度 电晕放电 复合绝缘子 电场强度 粒子密度 

分 类 号：TM216[一般工业技术—材料科学与工程]