813 / 2022-04-01 01:43:02

Study on Electrical Tree Suppression of SIR / EVA Blends under Temperature Gradient

Electrical Tree

IEEE ICHVE 2022 / 1-PAGE ABSTRACT

Study on Electrical Tree Suppression of SIR / EVA Blends under Temperature Gradient

Deng Fuyu

Sichuan Vocational and Technical College, Suining, Sichuan 629000

dfytju@foxmail.com



Purpose/Aim

SIR materials are widely used in insulation of high voltage cable accessories, and SIR electrical tree are the main cause of insulation failure. It is important to enhance the electrical tree suppression ability to maintain the safe and stable operation of power equipment.In this paper, the inhibition effect of SIR/EVA blends on the initiation and growth of electric tree under temperature gradient was studied by electrical tree degradation experiment, which provided experimental basis and theoretical support for enhancing the suppression ability of SIR electrical tree.



Experimental/Modeling methods

In this paper, SIR/EVA blends were prepared based on physical blending method, and the inhibition effect of SIR/EVA blends on the initiation and growth of electrical tree was studied under the condition of temperature gradient by scanning electron microscopy, infrared spectroscopy and tensile strength experiments.



Results/discussion

It is found that SIR/EVA blends can enhance the electrical tree suppression ability. This is consistent with the theoretical analysis results that physical cross-linking of SIR and EVA increases the threshold of molecular chain break, hindering the transport of thermal electrons to break the molecular chain and interface of SIR, thus leading to the enhancement of the inhibitory force of electrical tree.



Conclusions

In this paper, it is proposed and verified that SIR/EVA blends have a good inhibitory effect on electrical tree.