Particle-Initiated Breakdown Characteristics of Conical Insulator in N2 GAS and N2/02 Mixture under DC Voltage
Particle-Initiated Breakdown Characteristics of Conical Insulator in N2 GAS and N2/02 Mixture under DC Voltage
复制标题
DOI：
10.1109/tei.1987.298971
复制
发表时间：
1987-02
期刊：
影响因子：
--
通讯作者：
M. Hara;K. Adachi;H. Tobata;M. Akazaki;F. L. Mao
中科院分区：
文献类型：
--
作者：
M. Hara;K. Adachi;H. Tobata;M. Akazaki;F. L. Mao
在N2和79%N2/21%O2气体混合物中实验研究了锥形间隔物的颗粒引发的击穿特性，以提供确定被金属颗粒污染的电介质间隔物的击穿电压的基本参数。实验结果表明，在一定的条件下，颗粒污染隔离层的击穿电压随|90-|，而相反，清洁间隔物的反射率随着|90-|在0的范围内|90-|其中，间隔件角度φ被定义为间隔件表面与阳极平面电极之间的角度。在给定间隔物的情况下，当颗粒在N2/02混合物中放置在非常靠近阳极处，并且在N2气体中放置在电极上或非常靠近电极处时，击穿电压显示最小值（MBDV）。在给出MBDV的颗粒条件下，电晕稳定效果不太有效。MBDV随着气体压力和丝颗粒直径的减小而减小。临界颗粒长度取决于间隔物的形状，超过该临界颗粒长度，击穿电压被颗粒降低。MBDV的分析，包括放电传播所需的最小电场沿着间隔物表面和由于颗粒上的圆柱形间隔物的场增强的效果显示出相当好的协议与实验结果。
Particle-initiated breakdown characteristics of conical spacers were investigated experimentally in N2 and 79% N2/21% 02 gas mixture to provide fundamental parameters determining the breakdown voltage of a dielectric spacer contaminated by metallic particles. Experimental results show that the breakdown voltage of a particle-contaminated spacer increases with the value of |90-¿|, while in contrary that of the clean spacer decreases with the value of |90-¿| in the region of ¿ of 0|90-¿|60 degrees where the spacer angle ¿ is defined as the angle between the spacer surface and the anode plane electrode. With a given spacer the breakdown voltage reveals the minimum value (MBDV) when a particle was placed very near the anode in N2/02 mixture, and on or very near the electrodes in N2 gas. At the particle conditions giving the MBDV, the corona stabilization effect is less effective. The MBDV decreases with decreasing in the gas pressure and the wire particle diameter. The critical particle length beyond which the breakdown voltage is lowered by the particle depends on the spacer shape. Analysis of the MBDV to include a minimum electric field necessary for discharge propagation along the spacer surface and the effect of the field enhancements due to particle on a cylindrical spacer shows fairly good agreement with the experimental results.