Luo L.-S.,Beijing Super High Voltage Corporation of North China Grid Corporation |
Yao W.-J.,Beijing Super High Voltage Corporation of North China Grid Corporation |
Wang J.,Beijing Super High Voltage Corporation of North China Grid Corporation |
Li C.-R.,North China Electrical Power University |
And 3 more authors.
Dianwang Jishu/Power System Technology
The decomposition mechanism of SF6, the constituent of the decomposed gases of SF6 and their stability under various failures occurred in gas insulated switchgear (GIS) are analyzed. On this basis, it is thought that following decomposed gases such as SOF2, SO2, SO2F2, HF, SOF4 and S2F10 can be used as the characteristic gasses characterizing the partial discharge (PD) of GIS; by means of detecting the constitution of SOF2+SO2 and HF within GIS, whether there is internal partial discharge inside GIS or not can be judged. According to the content of HF, the state of internal PD inside GIS as well as whether the internal PD is increasingly extending can be determined. Source