SF_6局部放电分解模拟实验研究

Study on Simulation Experiment of SF_6 Decomposition under Partial Discharge

为研究GIS内不同缺陷引起的PD与SF6分解气体组之间的关联比对关系,设计了3种引起GIS内局部放电的典型缺陷模型。在这三种缺陷模型下,分别在3个电压等级下对SF6进行96 h局部放电分解实验,检测到CF4、CO2、SO2F2以及SOF2四种分解气体组分。结果表明,在相同条件下,4种气体产量各不相同,且随时间延长而有所增加;在相同电压等级下,3种缺陷模型中气体分解特性各不相同;而在不同电压等级下,同一缺陷模型中气体含量增长规律有较大差异。

In order to study relationships between partial discharges （PD）caused by different defects in GIS and SF6 gaseous decomposition components, three kinds of typical defect models for GIS internal partial discharge are designed. With three defect models, a 96 hours experiment of SF6 decomposition under partial discharge has been carried under three different voltage levels. Four kinds of gaseous components decomposed are detected which are CF4,C02, S02F2 and SOF2. The result shows that volumes of four kinds of gaseous components are different under the same condition and it is increasing along with the time. The gaseous decomposition properties are different in three defect models under the same Voltage level;and the increasing regularities of gaseous components volume are different under same model and different voltage level.