摘要
由于SF6气体的温室效应,减少SF6气体的使用具有深远的社会意义,用SF6/N2混合气体取代纯SF6气体作为高压电器设备的绝缘介质是减少使用SF6气体的有效措施。介绍了SF6/N2混合气体的优点。从气体放电理论出发,对不同比例SF6/N2混合气体的绝缘性能进行了分析,结果表明:SF6体积分数仅为20%的SF6/N2混合气体击穿强度为相同气体压力纯SF6的70%左右;若SF6体积分数为20%的SF6/N2混合气体的击穿强度要达到纯SF6气体的击穿强度,其总压力应为纯SF6气体的1.4倍。新东北电气集团高压开关有限公司研制的采用20%SF6和80%N2混合气体绝缘,总压为0.6 MPa的550 kV SF6/N2混合气体母线在机械工业高压电器产品质量检测中心(沈阳)顺利通过了绝缘型式试验,且其雷电冲击耐受水平高达1 842.5 kV。因此,用SF6/N2混合气体作为550 kV母线的绝缘介质是切实可行的。
Due to greenhouse effect of SF6, it is necessary to substitute SF6/N2 gas mixture for SF6 gas as insulation medium in electric power equipment. In this paper, advantages of SF6/N2 mixtures are discussed. The insulation performances of the SF6/N2 gas mixtures with different SF6 contents are analyzed according to gas discharge theory. The results show that： the critical field strength of the SF6/N2 gas mixture with 20% of SF6 in volume reaches 70% that of pure SF6 under same pressure, and the SF6/Nz gas mixture with 20% SF6 can achieve the same critical field strength with that of pure SF6 if the pressure of the mixture is 1.4 times of that of pure SF6. The 0.6 MPa 20% SFs/ 80%N2 gas mixture insulated 550 kV busbar developed by New Northeast Electric Group High Voltage Switchgear Co., Ltd. has passed the insulation tests in High Voltage Apparatus Quality Test ＆ Research Center of Machinery Industry（Shenyang）, and its lightning impulse withstand level reaches to 1 842.5 kV.
出处
《高压电器》
CAS
CSCD
北大核心
2014年第1期77-80,共4页
High Voltage Apparatus
