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- 2015
吸附剂对SF6典型分解产物含量及变化规律的影响
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Abstract:
选用了电力设备中常用的吸附剂KDHF？？03分子筛,模拟研究了吸附剂对电力设备中SF6气体在局部放电下分解特性的影响,特别关注了SO2、SO2F2、S2OF10等几种典型分解产物添加吸附剂前后的产生规律。结果表明,添加吸附剂后,3种产物的含量均明显降低,SO2F2与S2OF10两种产物的吸附率(体积分数)分别达到79.92％和78.73％,SO2含量则始终低于气体分析系统的检测限度。此外,引入吸附剂之后,SO2F2与S2OF10的产生速率随着加压时间逐渐降低,其含量随时间延长逐渐饱和。最后,提出将φ(S2OF10)/φ(SO2F2)作为SF6类设备绝缘缺陷诊断判据,该比值在有、无吸附剂两种情况下表现出了很好的稳定性,添加吸附剂前后其值均稳定在1.5～2.0之间。
KDHF？？03 molecular sieve, a kind of adsorbent commonly used in electrical equipments, is chosen to investigate the effects of absorbents on SF6 decomposition characteristics under partial discharge. The formation laws of several typical products, including SO2、SO2F2、S2OF10 before and after adding adsorbents, are focused on. The results show that the contents of these three kinds of decomposition products obviously decrease after adding adsorbents, the adsorption rates of SO2F2 and S2OF10 get 79.92％ and 78.73％ respectively, and the amount of SO2 even falls below the detection limitation of gas analysis system. In addition, the productive rate of SO2F2 and S2OF10 decreases with the pressurization prolonging. Finally φ(S2OF10)/φ(SO2F2), which remains within 1.5―2.0 before and after adding adsorbents, is suggested as diagnosis criterion for insulation defects in SF6 gas？？insulated electrical equipment
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