Title :
Space charge and anomalous discharge currents in crosslinked polyethylene
Author :
Malec, D. ; Essolbi, R. ; The-Giam, Hoang ; Bui-Ai ; Garros, B.
Author_Institution :
Lab. de Genie Electr., Univ. Paul Sabatier, Toulouse, France
fDate :
2/1/1996 12:00:00 AM
Abstract :
Transient currents in cross-linked polyethylene (XLPE) have been investigated by using different parameters: temperature T, electrical field Ep and hydrostatic pressure P. Anomalous discharging currents flowing in the same direction as charging currents were observed from T=30 to 70°C, P=0.1 to 30 MPa and Ep=13 to 33 kV/mm. The space charge was measured using the pressure wave propagation method (PWP). Theoretical calculation revealed that this anomalous behavior can result from charge migration under a partial blocking condition at the electrodes. We discuss theoretical results which are in reasonable agreement with our discharge current measurements
Keywords :
XLPE insulation; discharges (electric); space charge; 0.1 to 30 MPa; 30 to 70 C; XLPE; charge migration; cross-linked polyethylene; discharge currents; electrode blocking; pressure wave propagation; space charge; transient currents; Charge measurement; Current measurement; Electrodes; Polarization; Polyethylene; Polymers; Semiconductivity; Space charge; Temperature; Voltage;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
