Researchon multi-field numerical simulation of ablation resistance of CuW alloy with graphene
With the continuous increase of power demand,the system operation of high-voltage power grid and ultra-high-voltage power grid needs to be guaranteed,and the breaking life of high-voltage circuit breaker has become an important factor in the safe operation of high-voltage and higher voltage network lines.In the process of electric contact breaking off at high voltage,due to the breakdown discharge and arcing ablation,the surface of electric contact will produce material transfer,which will lead to the failure of electric contact after many times of accumulation,thus resulting in potential safety hazard.It is very important to improve the ablative re-sistance of electrical contacts,but the evaluation of ablative performance still depends on expensive type test.In this paper,the preparation and properties of graphene/CuW alloy and the physical process of breaking high-voltage electrical contact are investigated.Then,a high-voltage ablation simulation model of electrical contacts was established by using the modified CuW contact material doped with graphene.It was found that the distri-bution of graphene in CuW was uniform,and the density and mechanical properties of CuW were improved,so that the electrical contact had better mechanical and electrical properties.The temperature distribution of elec-tric contact under arc erosion is obtained by theoretical simulation and simulation model calculation of high volt-age ablation process of electric contact.By comparing the temperature distribution of the electric contact under arc erosion between the graphite modified CuW and the traditional CuW,it is found that the graphite modified CuW has stronger resistance to electric erosion.In this paper,the strengthening mechanism of graphene in CuW alloy is explained,and the theoretical and simulation guidance for further research and development of gra-phene-doped CuW contact is provided.
graphene modified materialCuW alloyelectric contactfinite element methodsimulation
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维普
