非均匀场下SF_6短间隙正电晕放电行为  

Positive corona discharge behaviors of SF_6 short gap under non-uniform field

作　　者：郑殿春[1] 夏云双[1] 赵大伟[1] 陈春天[1] 王佳[1] 

机构地区：[1]哈尔滨理工大学工程电介质及应用技术教育部重点实验室,黑龙江哈尔滨150080

出　　处：《电机与控制学报》2013年第5期75-79,共5页Electric Machines and Control

基　　金：国家自然科学基金(51077032);黑龙江省教育厅科学技术研究项目(12511z008)

摘　　要：为深入探索SF6气体放电过程的微观机制,对大气压下10mm针-板电极SF6气体间隙的正电晕放电通道中带电粒子行为进行了研究。在尖-板电极模型的基础上,考虑了SF6间隙放电过程带电粒子电离、附着、复合、扩散以及光致电离的影响,给出了SF6短气隙正电晕放电过程的电子、正离子和负离子时空行为的表征方程,以及与空间电荷场耦合的泊松方程,并采用通量校正输运法(flux-corrected transport,FCT)对粒子连续性方程进行求解,获得了放电过程中带电粒子的时空行为规律及空间电场分布发展规律,并从空间电荷密度、放电参数、电场强度等方面与实验结果相比较,验证了模型及算法的正确性。To deeply explore the microscopic cle behaviors in lOmm gap are investigated, mechanism of SF6 gas discharge process, the charged partiduring the positive corona discharge process of SF6 at atmospheric pressure. Based on the needle-plane electrodes, the tempo-spatial evolution of positive ions, negative ions, and electrons in the discharge equations, and coupled with the Poisson process were described in details by two-dimensional continuity ＇ s equation ; meanwhile, the effect mechanisms of ionization, attachment, recombination, electron diffusion, and photoionization were also considered, and then the flux corrected transport method （FCT） was used to solve the continuity equations. The tempo-spatial regularity of the charged particles in the discharge process was gotten, and the development law of the spatial electric field was revealed. Results indicate that the space charge density, discharge parameters, and electric field intensity are consistent with experimental ones.

关 键 词：针-板电极 SF6气体 粒子行为 电场分布 电晕放电 

分 类 号：O461[理学—电子物理学]