Title :
The effect of cable structure on space charge formation
Author :
Khalil, M.S. ; Zaky, A.A.
Author_Institution :
Naval Coll., Alexandria, Egypt
Abstract :
An experimental investigation of space charges in LDPE (low-density polyethylene) and XLPE (cross-linked polyethylene) cables with different semiconductor layers is presented. The space-charge distribution was investigated using the field probe technique as a direct method. It was found that the structure of the semiconducting layers as well as the voltage polarity of the conductor have a marked effect on the space-charge distribution. The results provide direct experimental evidence on the polarity of space charges formed in HVDC (high-voltage, direct-current) cables. Their distribution helps to explain the reduction of the breakdown voltage that occurs on polarity reversal.<>
Keywords :
cable insulation; organic insulating materials; polymers; probes; space charge; HVDC; LDPE; XLPE; breakdown voltage; cable structure; cross-linked polyethylene; field probe technique; low-density polyethylene; polarity reversal; semiconductor layers; space charge formation; voltage polarity; Cable insulation; Conducting materials; Conductors; HVDC transmission; Power cable insulation; Power cables; Probes; Semiconductivity; Solids; Space charge;
Journal_Title :
Electrical Insulation, IEEE Transactions on
