高压开关SF<sub>6</sub>-Cu电弧净辐射系数计算

doi:10.19595/j.cnki.1000-6753.tces.171750

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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SF₆电弧中,来自触头烧蚀的铜蒸气会显著影响SF₆电弧的辐射过程。为了给考虑触头烧蚀的SF₆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SF₆-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SF₆-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SF₆-Cu电弧的NEC显著提高。

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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

Abstract：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.

Key words： SF₆ arc copper vapor radiation transport net emission coefficient atomic spectrum molecular spectrum

收稿日期: 2017-12-26 出版日期: 2018-12-17

PACS:

TM561

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

作者简介: 仲林林男,1990年生,博士,讲师,研究方向为放电等离子体基础理论与应用、大数据与人工智能技术。E-mail：mathboylinlin@gmail.com（通信作者）;王小华男,1978年生,教授,博士生导师,研究方向为电器智能化理论与技术、低温等离子体及应用。E-mail：xhw@mail.xjtu.edu.cn

引用本文:

仲林林, 王小华, 荣命哲. 高压开关SF₆-Cu电弧净辐射系数计算[J]. 电工技术学报, 2018, 33(23): 5600-5606. Zhong Linlin, Wang Xiaohua, Rong Mingzhe. Calculation of Net Emission Coefficients of SF₆-Cu Arc in High-Voltage Circuit Breakers. Transactions of China Electrotechnical Society, 2018, 33(23): 5600-5606.

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