PD故障下C4F7N-CO2-O2气体混合物固体副产物的生成特性,ACS Omega

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PD故障下C4F7N-CO2-O2气体混合物固体副产物的生成特性
ACS Omega ( IF 3.7 ) Pub Date : 2023-06-20 , DOI: 10.1021/acsomega.3c00345
Ran Zhuo _{1,

2,

3} , Mingli Fu _{1,

2,

3} , Dibo Wang _{1,

2,

3} , Yan Luo _{1,

2,

3} , Guoli Wang _{1,

2,

3} , Lei Jia _{1,

2,

3}

Affiliation

随着气体绝缘设备（GIE）安全稳定运行要求的逐步提高，环保绝缘气体C ₄ F ₇ N–CO ₂ –O _{2已成为替代SF}₆并应用的最佳选择。适用于各种中压 (MV) 和高压 (HV) GIE。目前，C ₄ F ₇ N-CO ₂ -O _{2固体分解产物的生成特征}需要研究局部放电（PD）故障下的气体混合物。本文采用针板电极模拟GIE中金属突出缺陷进行96 h PD分解试验，研究PD故障下C 4 F 7 N–CO 2 –O 2_气体混合物_固体分解_产物的_生成特性以及它们与金属导体的兼容性。发现在长期PD作用下，板电极表面中心区域出现了明显的环状固体析出物，主要包括金属氧化物(CuO)、硅酸盐(CuSiO 3 )、氟化物(CuF、_CF ) _X )、碳氧化物 (CO, CO ₂ ) 和氮氧化物 (NO, NO ₂）。_{4%O 2}的添加对PD固体析出物的元素组成和价态影响不大，但会在一定程度上降低其产率。_{气体混合物中的O 2}对金属导体的腐蚀作用比C ₄ F ₇ N弱。

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Generation Characteristics of Solid Byproducts of the C4F7N–CO2–O2 Gas Mixture under PD Fault

With the gradual improvement of the requirements for the safe and stable operation of gas-insulated equipment (GIE), the eco-friendly insulating gas C₄F₇N–CO₂–O₂ has become the best choice to replace SF₆ and apply it to various medium-voltage (MV) and high-voltage (HV) GIE. At present, the generation characteristics of solid decomposition products of the C₄F₇N–CO₂–O₂ gas mixture under partial discharge (PD) fault need to be studied. In this paper, a 96 h PD decomposition test was carried out by simulating metal protrusion defects in GIE with needle-plate electrodes to study the generation characteristics of C₄F₇N–CO₂–O₂ gas mixture solid decomposition products under PD fault and their compatibility with metal conductors. It was found that obvious ring-shaped solid precipitates appeared in the central area of the surface of the plate electrode under the action of long-term PD, mainly including metal oxides (CuO), silicates (CuSiO₃), fluorides (CuF, CF_X), carbon oxides (CO, CO₂), and nitrogen oxides (NO, NO₂). The addition of 4% O₂ has little effect on the element composition and valence state of PD solid precipitates, but it can reduce their yield to a certain extent. The corrosion effect of O₂ in the gas mixture on metal conductors is weaker than that of C₄F₇N.

更新日期：2023-06-20

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