Stress Distribution In Two Layers Of H.V.D.C Cable Insulation For Cooling Outer Conductor

Stress Distribution In Two Layers Of H.V.D.C CableInsulation For Cooling Outer ConductorFarook K. Amouri Mohammed R. AlmallahB.Sc. M. Phil Ph. D B.Sc. M.Sc Ph. DProfessor in High Voltage and Machine Senior engineer in the General Directorate ofEngineering, a dean of College of Engineering, Electricity Transmission Northern,Mosul University, Iraq. Ministry of Electricity, Iraq.E-mail: [emailprotected] E-mail: [emailprotected].AbstractIn DC transmission, Stress inversion is a complex phenomena occurring in thecable insulation seriously hampering the design of HVDC cables. Radial variation of thetemperature dependent DC conductivity, forces the stress inversion under certainconditions. A new proposed power cable with two insulation layers (XLPE and oil) withforced coolant oil has been analyzed under DC voltage to improve the performance ofDC cables.The new proposed cooling method increase the ampacity of the cable, reducingspace charge affection and reducing the radial temperature drop which is in turncausing less variation in DC stress distribution.Keywords: Cooling, DC Power Cable, Electrical Stress. . .. . XLPE( . ( . .