环保型绝缘气体逃逸束流特性研究  

Escape beam characteristics of environmentally friendly insulating gas

作　　者：许元博 武绍琮 陈庚[1] 屠幼萍[1] XU Yuanbo;WU Shaocong;CHEN Geng;TU Youping(State Key Laboratory of Renewable Electrical Power System,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206

出　　处：《绝缘材料》2025年第2期25-31,共7页Insulating Materials

基　　金：国家自然科学基金面上项目(51877080)。

摘　　要：为了获得纳秒脉冲电压作用下环保型绝缘气体的逃逸束流特性,对洁净空气、SF_(6)和C_(4)F_(7)N/CO_(2)混合气体中逃逸电子的产生规律进行研究。通过搭建逃逸电子收集平台,检测在不同气压的纯净空气、SF_(6)和C_(4)F_(7)N/CO_(2)混合气体条件下,施加不同幅值的纳秒脉冲电压时产生逃逸电子的电荷量。结果表明:纳秒脉冲作用下低能电子会加速转变为逃逸电子,纳秒脉冲电压幅值越高,气体压强越低,绝缘气体产生的逃逸电子电荷量越大。洁净空气对逃逸电子产生的抑制效果相对较弱,SF_(6)和C_(4)F_(7)N/CO_(2)混合气体对逃逸电子产生有明显的抑制效果,随气压升高,C_(4)F_(7)N/CO_(2)混合气体相对于SF_(6)对逃逸电子产生的抑制效果更加明显。In order to obtain the escape beam characteristics of environmentally friendly insulating gas under the action of nanosecond pulse voltage,the generation laws of the escape electrons in clean air,SF_(6),and C_(4)F_(7)N/CO_(2) gas mixture were studied.An escape electron collection platform was built,and the charge amount of the generated escape electrons was measured when different amplitudes of nanosecond pulse voltages were applied to clean air,SF_(6),and C_(4)F_(7)N/CO_(2) gas mixture under different gas pressures.The results show that the low-energy electrons will accelerate and transform to escape electrons under the action of nanosecond pulse.The higher the nanosecond pulse voltage amplitude,the lower the gas pressure,and the larger the charge amount of escape electrons generated by insulating gas.The clean air has relatively weak inhibition on the generation of escape electrons,and the SF_(6) and C_(4)F_(7)N/CO_(2) gas mixture have obvious inhibition effect on the generation of escape electrons.As the pressure increases,the inhibition effect on the generation of escape electrons of C_(4)F_(7)N/CO_(2) gas mixture is more obvious than that of SF_(6).

关 键 词：GIS 纳秒脉冲 逃逸电子 气压 

分 类 号：TM213[一般工业技术—材料科学与工程]