CHEN Zhen-xin, YU En-ke, WANG Yang, et al. Research on the Electric Field Distribution and Structure Optimizing of Integral Prefabricated Joint and Taped Joint[J]. 2018, 23(6): 77-81.
CHEN Zhen-xin, YU En-ke, WANG Yang, et al. Research on the Electric Field Distribution and Structure Optimizing of Integral Prefabricated Joint and Taped Joint[J]. 2018, 23(6): 77-81.DOI: 10.15938/j.jhust.2018.06.014.
Abstract:Integral prefabricated joint and taped joint are two kinds of widely used cable joint.Because of the different structure and conductivity of insulation
there is great difference in the electric field distribution between the two kinds of joints .In this paper
50.kV crosslinked polyethylene high voltage dc cable joint is selected as the research object
models of Integral Prefabricated Joint (silicone rubber insulated) and taped joint (oil impregnated paper insulated) was established and the electric field distribution in the joints was analyzed by comsol software.It is found that the electric field at the root of stress cone reached 45.kV/mm for Integral Prefabricated JointThe electric field at the root of stress cone was nearly 0.kV/mm for taped joint but the electric field at the top of reversed stress cone reached 30.kV/mm.By optimizing the structure of the taped joint
the maximum electric field is reduced to 7.kV/mm.By using Teflon as the taped insulation which can reduce the maximum electric field to 3.kV/mm.The research is a reference in the HVDC cable joints design