Comparing the gas response property of pure TNTAs, Pt-TNTAs and Au-TNTAs sensors to SF6 decomposition components, metal decoration not only enhances the gas response to the decomposition components but also realizes the selective detection to different decomposition components.
Moreover, the decomposition components, referred to as intrinsic mode functions (IMFs), are generally in good agreement with intuitive and physical signal interpretations.
On the other hand, the decomposition components (low-fluorine sulfides) corrode the surface of SF6-insulated equipment with the action of trace water and oxygen in equipment [21].
In most of the existing audio coding techniques the fundamental decomposition components or building blocks are in the frequency domain with corresponding energy associated with them.
In this paper, we will review the achievements in the filed using TiO2 nanotubes for three typical SF6 decomposition components: SO2, SOF2, and SO2F2 detection.
Pyruvic acid was formed directly from alanine, whereas acetamide was produced likely from acetaldehyde and ammonia, which are the decomposition components of alanine.
Their performances as sensors of both experimental analysis and theoretical calculation for various kinds of decomposed gases are summarized, and the further research trend on CNTs in the detection of SF6 decomposition components is also put forward.
However, SF6 gas will inevitably decomposes to various typical decomposition components: SO2, SOF2, SO2F2, etc. under partial discharge and disruptive discharge (surface flashover and creeping discharge) when insulation defects occurs in production and long term operation process [18 20].
Fitting the resistance with different concentration of SO2, SOF2, and SO2F2 (250 50, 75, and 100 ppm) shown in Fig. 12a2 c2, the response of Au-TNTAs to different kinds of SF6 decomposition components is in the following order: SO2F2 > SOF2 > SO2.
In order to evaluate and diagnose the insulation status of SF6-insulated equipment, TNTAs gas sensor becomes an effective new method to realize the function by detecting the decomposition components of SF6: SOF2 SOF2, and SO2F2.
