DBD中表相放电对电荷及能量传递的影响  

Surface Discharge Effect on Charge and Energy Transfer in DBD

作　　者：高军伟[1] 孙岩洲[1] 裴植 张燕[3] 孙念念[1] GAO Junwei;SUN Yanzhou;PEI Zhi;ZHANG Yan;SUN Niannian(School of Electrical Engineering and Automation,Henan Polytechnic University,Henan Jiaozuo 454000,China;State Grid Henan Jiaozuo Electiic Power Supply Company,Henan Jiaozuo 454000,China;School of Mechanical and Power Engineering,Henan Polytechnic University,Henan Jiaozuo 454000,China)

机构地区：[1]河南理工大学电气工程与自动化学院,河南焦作454000 [2]国网河南焦作供电公司,河南焦作454000 [3]河南理工大学机械与动力工程学院,河南焦作454000

出　　处：《高压电器》2018年第9期32-37,共6页High Voltage Apparatus

基　　金：国家自然科学基金资助项目(U1204506;11405044)~~

摘　　要：通过两组电极结构多针—板和板—板以及微腔—薄板和薄板—薄板的对比实验,研究了小曲率半径电极在DBD中产生表相放电效应的特点,对DBD的应用和推广具有重要意义。文中首先利用U-Q Lissajous图形,分析了第一组实验中气隙电压和传输电荷的不同,计算出相同功率消耗下多针—板的传输电荷约为板—板的1.5倍,并在第二组中得到验证,即微腔沿面放电的表相效应也产生较多的传输电荷;然后利用约化场强,分析电子平均能量的变化及分子振动温度的差异,讨论尖极电晕的表相效应对电荷及能量传递的影响。研究结果表明:在不均匀电场DBD中,小曲率半径电极尖端的局部约化场强可达750 Td,但大部分气隙中约化场强远低于板—板结构;受此影响,尖端电极附近的电子平均能量约为13 eV,更易在空气中发生有效碰撞电离并产生大量电荷;但此时对应分子振动温度较低,其放电过程中产生的激发态粒子少于板—板结构。To study characteristics of surface discharge effect in DBD, two sets of comparative experiments were conducted on plate-plate and multi-needle-plate electrode structures and microcavity-plate and thin plate-thin plate electrode structures. U-Q Lissajous figures were employed to analyze the air-gap voltage and charge transport in the first set of experiment, and the result showed that the transferred charge of the multi-needle-plate electrode structure was about 1.5 times that of the plate-plate structure under the same power consumption. The second set of experiment verified the above result, that is, the surface discharge effect of the microcavity produced more transferred charge. Then, reduced electric field was adopted to analyze the variation of average electron energy and the difference of mo- lecular vibration temperature, and the surface discharge effect of the needle electrode corona on transfer of charge and energy was discussed. It was revealed that, in the non-uniform electric field of DBD, the local reduced electric field of the electrode tip with small radius of curvature was up to 750 Td, but the reduced electric fields in most of the air gaps were far lower than that of the plate-plate structure. Therefore, the average electron energy around the electrode tip was about 13 eV, which facilitates collision and ionization of the electrons in air and production of a large amount of charge. However, in this case, the temperature of molecular vibration was lower, and the excited particles generated in the discharge process were less than that generated by the plate-plate structure.

关 键 词：介质阻挡放电 表相放电 U-Q LISSAJOUS图形 约化场强 电子能量 

分 类 号：TM83[电气工程—高电压与绝缘技术]