高压开关SF_6-Cu电弧净辐射系数计算  

Calculation of Net Emission Coefficients of SF_6-Cu Arc in High-Voltage Circuit Breakers

作　　者：仲林林 王小华[2] 荣命哲[2] Zhong Linlin;Wang Xiaohua;Rong Mingzhe(School of Electrical Engineering Southeast University Nanjing 210096 China;State Key Laboratory of Electrical Insulation and Power Equipment School of Electrical Engineering Xi'an Jiaotong University Xi’an 710049 China)

机构地区：[1]东南大学电气工程学院,南京210096 [2]电力设备电气绝缘国家重点实验室(西安交通大学电气工程学院),西安710049

出　　处：《电工技术学报》2018年第23期5600-5606,共7页Transactions of China Electrotechnical Society

基　　金：中央高校基本科研业务费专项资金资助项目(2242018K40076)

摘　　要：辐射是高温电弧等离子体能量输运的主要过程之一。在高压SF_6电弧中,来自触头烧蚀的铜蒸气会显著影响SF_6电弧的辐射过程。为了给考虑触头烧蚀的SF_6电弧仿真提供辐射相关的基础数据,在原子线状谱、原子连续谱及分子谱辐射计算研究的基础上,建立了高压开关SF_6-Cu电弧净辐射系数(NEC)计算模型,分析了电弧半径、电弧压力及铜蒸气浓度对SF_6-Cu电弧NEC的影响规律。研究发现:低温时,共振谱线占据主导;高温时,非共振谱线占据主导。NEC随电弧半径增大而下降,随电弧压力增强而升高。铜相比氟和硫等非金属元素更容易激发,谱线辐射强度更高,因此铜蒸气的存在使得SF_6-Cu电弧的NEC显著提高。Radiation is one of the key processes of energy transport in high-temperature arc plasmas.In high-pressure SF6 arc,the copper vapor resulting from electrode erosion shows significant influences on the radiation transport in SF6 arc.In order to provide the basic data of radiation for the simulation of SF6 arc with consideration of electrode erosion,the calculation model for net emission coefficients(NEC)of SF6-Cu arc in high-voltage circuit breakers was established in this work based on the study of atomic lines,atomic continuum,and molecular spectrum.The effects of arc radius,arc pressure,and copper concentration were analyzed on the NEC of SF6-Cu arc.It is found that the resonance lines and non-resonance lines dominate the NEC at low and high temperatures respectively.With the increase of arc radius,the values of NEC are reduced.With the increase of arc pressure,the values of NEC are raised.The existence of copper vapor strongly raises the values of NEC because copper is easier to ionize and excite than nonmetallic elements such as fluorine and sulfur.

关 键 词：SF6 电弧 铜蒸气 辐射输运 净辐射系数 原子光谱 分子光谱 

分 类 号：TM561[电气工程—电器]