Title :
Space charge in extruded insulation under DC divergent field
Author :
Tingxi, Sun ; Jingui Li ; Qiliang, Ying ; Zouyi Fan
Author_Institution :
Dept. of Appl. Chem., Shanghai Jiaotong Univ., China
Abstract :
Curves of thermally stimulated current (TSC) from XLPE (cross-linked polyethylene) specimens were obtained and in turn used to determine the trap depths of the specimens with charge transfer complexes (CTC), antistatic agents, and polypropylene and polystyrene additives. The relation between space charge in dielectrics and charge-injection time was established. By studying tree growth in various specimens in relation to space charge, it is found that when CTC, antistatic agents, and MgPc are doped in PE, the rate of tree growth is slowed; there exists a special relation between the length of electrical trees under AC after DC prestress and the value of DC prestress
Keywords :
cable insulation; electric breakdown of solids; electron traps; organic insulating materials; power cables; space charge; AC stress; DC divergent field; DC prestress; XLPE; antistatic agents; charge transfer complexes; charge-injection time; cross-linked polyethylene; dielectrics; extruded insulation; polypropylene additives; polystyrene additives; power cable insulation; space charge; thermally stimulated current; trap depths; tree growth; Breakdown voltage; Charge transfer; Dielectrics and electrical insulation; Electric breakdown; Electrodes; Electrons; Needles; Polymers; Space charge; Trees - insulation;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1988. Proceedings., Second International Conference on Properties and Applications of
Conference_Location :
Beijing
DOI :
10.1109/ICPADM.1988.38490
