Dividing and setting strategy of improving calculation efficiency for needle electrode corona discharge with a large-scale space
作者机构：International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma PhysicsState Key Laboratory of Advanced Electromagnetic Engineering and TechnologySchool of Electrical Engineering and ElectronicsHuazhong University of Science and TechnologyWuhanChina Digital Grid Research Institute of China Southern Power GridGuangzhouChina Zhuzhou CRRC Times Electric Co.Ltd.(TEC)ZhuzhouChina
出 版 物：《High Voltage》 (高电压（英文）)
年 卷 期：2022年第7卷第3期
页 面：429-438页
核心收录：
学科分类：0808[工学-电气工程] 07[理学] 0701[理学-数学]
基 金：National Key Research and Development Program of China,Grant/Award Numbers:2016YFC0401002,2016YFC0401006 National Natural Science Foundation of China,Grant/Award Numbers:51577080,51821005。
主 题：electrode calculation partition
摘 要：Needle electrodes are widely used in the research of corona discharge.Aiming at the problem of needle electrode discharge in a large-scale space(tens or even hundreds of centimetres),a hybrid model was proposed in the previous work.However,its indis-pensable multiple iterations result in huge computation and further limit its wide appli-cations.Therefore,a strategy to improve the computing efficiency by setting initial values in different computational domains is put forward in this work.Three types of setting initial values(global constant,partition constant and partition exponent)are simulated and compared in detail.The calculation results show that the calculation efficiency can be increased by 1.4 times simply through setting initial values of charged particles as different constants for the divided subdomains,and further be improved by 4.3 times by setting those in the ionization region as an exponential distribution.The extension of the pro-posed strategy has also been discussed under various voltages,which shows that the results under other voltages can be quickly obtained based on the fitted coefficients under a specific voltage,and the improvement can reach up to 10 times.The accuracy of calculated results has been demonstrated by a needle-plate electrode device with a vertical distance of 25 cm.This research provides an effective strategy for improving the computing efficiency of corona discharge in a large-scale space,and implies the potential in optimizing the analyses of complex electrodes.
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