| 均匀场中SF6二维流注放电模型的动态仿真 |
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| 引用本文： | 王湘汉,汪沨,邱毓昌. 均匀场中SF6二维流注放电模型的动态仿真[J]. 高电压技术, 2008, 34(7): 1358-1362 |
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| 作者姓名： | 王湘汉 汪沨 邱毓昌 |
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| 作者单位： | 1. 湖南大学电气与信息工程学院,长沙,410082
2. 西安交通大学电力设备与电气绝缘国家重点实验室,西安,710049 |
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| 摘 要： | 为了对SF6气体的放电过程进行深入研究,使用含电子、正离子、负离子的连续方程对SF6气体的放电过程建模,通过耦合泊松方程进行了解决空间电荷对电场的畸变影响的研究。使用通量校正传输法(Flux-Corrected Transport)求解连续方程,并首次实现了二维情况下的SF6放电过程的动态仿真。模拟过程考虑了带电粒子及中性气体分子的电离、吸附、复合、扩散以及光电离等过程。从仿真结果可见,SF6放电时的电子崩转化成了正、负流注,并且光电离过程加速了流注的发展。通过仿真使得SF6流注放电机制的研究从定性变为定量,这对于进一步研究SF6及相关气体的放电机理具有重要意义。
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| 关 键 词： | 六氟化硫 气体放电 电子崩 流注 通量校正传输法 模拟 |
Dynamic Simulations of Two-dimensional Streamer Discharge in Uniform Field in SF6 |
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| WANG Xiang-han,WANG Feng,QIU Yu-chang. Dynamic Simulations of Two-dimensional Streamer Discharge in Uniform Field in SF6[J]. High Voltage Engineering, 2008, 34(7): 1358-1362 |
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| Authors: | WANG Xiang-han WANG Feng QIU Yu-chang |
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| Affiliation: | 1.School of Electrical and Information Engineering,Hunan University,Changsha 410082,China;2.State Key Lab for Electrical Insulation and Apparatus,Xi’an Jiaotong University,Xi’an 710049,China) |
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| Abstract: | Continuity equations for electrons,positive ions,and negative ions are used to establish discharge model in SF6.The electric field distortion caused by space-charged field is settled by coupling Possion's equation to the continuity equations.A flux-corrected transport technique is used to solve the continuity equations and a simulation of two-dimensional discharge process in SF6 is realized,which includes ionization,attachment,recombination,diffusion and photoionization.The transition of the electron avalanche into streamer in SF6 is observed during the simulation.The velocities of the anode-and cathode-directed streamers are also calculated.The simulation shows that photoionization accelerates the streamer development. |
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| Keywords: | sulfur hexafluoride gas discharge electron avalanche streamer flux-corrected transport simulation |
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