Influence regularity of O2 on dielectric and decomposition properties of C4F7N-CO2-O2 gas mixture for medium-voltage equipment
Influence regularity of O2 on dielectric and decomposition properties of C4F7N-CO2-O2 gas mixture for medium-voltage equipment
复制标题
O2对中压设备用C4F7N-CO2-O2气体混合物介电性能和分解性能的影响规律
DOI：
10.1049/hve.2019.0219
复制
发表时间：
2020-06-01
期刊：
影响因子：
4.4
通讯作者：
Cui, Zhaolun
中科院分区：
文献类型：
--
作者：
Li, Yi;Zhang, Xiaoxing;Cui, Zhaolun
氟化腈（C4 F7 N）混合气体是最有希望取代六氟化硫用于气体绝缘设备的气体。在这项研究中，作者探讨了氧气对C4 F7 N-CO2-O-2气体混合物的介电和分解性能的影响。结果表明，含2、4、6、8和10%O-2的C4 F7 N-CO2-O-2混合气体的介电强度比C4 F7 N-CO2分别提高了4.85%、6.49%、7.70%、3.21%和2.74%。在C_4F_7 N-CO_2混合气体中加入2- 6%O ~-_2，可有效地降低大部分分解副产物CF_4、CO、C_2F_6、C_3F_6、C_3F_8、CF_3CN、C_2F_5CN、（CN）（2）的含量。而高氧含量（>6%）会导致C_4F_7N的分解率增加，这对C_4F_7N混合气体的稳定性有不利影响。在中压工程应用中，一般建议在C_4F_7 N-CO_2混合气体中加入2- 6%O（2），以提高其绝缘性能，并抑制C_4F_7N在放电中的分解。
Fluorinated nitrile (C4F7N) gas mixture has been introduced as the most promising candidate to replace sulfur hexafluoride using in gas-insulated equipment. In this study, the authors explored the influence of oxygen on the dielectric and decomposition properties of C4F7N-CO2-O-2 gas mixture. The authors found that the dielectric strength of the C4F7N-CO2-O-2 gas mixture with 2, 4, 6, 8 and 10% O-2 was increased by 4.85%, 6.49%, 7.70%, 3.21% and 2.74% compared with C4F7N-CO2. The addition of 2-6% O-2 to the C4F7N-CO2 gas mixture could effectively reduce the content of most of the decomposition by-products such as CF4, CO, C2F6, C3F6, C3F8, CF3CN, C2F5CN, (CN)(2). While igh content of oxygen (>6%) results in higher decomposition of C4F7N, which has a negative effect on the stability of C4F7N gas mixture. Generally, it is recommended to add 2-6% O(2)in the C4F7N-CO2 gas mixture to improve its insulation properties as well as inhibit the decomposition of C4F7N in the discharge for medium-voltage engineering application.