Conference paper
Dynamic space charge behaviour in polymeric DC cables
The use of extruded insulation for DC cables involves a risk of local electric field enhancement, caused by a space charge build-up within the dielectric. In this work, the theory of charge generation and transport in polymers is applied in a numerical computer model in order to predict the formation and transport of space charges in a polymeric dielectric.
The model incorporates the processes of field assisted electron-hole pair generation from impurity atoms, trapping and charge injection at the electrodes. Its aim has been to study the field- and temperature dependent dynamic behaviour of a dielectric. Results obtained using this model-based framework are compared to measurement results obtained from Laser Induced Pressure Pulse (LIPP) space charge measurements as well as conductivity measurements on selected cable type samples.
| Language: | English |
|---|---|
| Publisher: | IEEE |
| Year: | 2002 |
| Pages: | 23-26 |
| Proceedings: | 11th International Symposium on Electrets |
| ISBN: | 0780375602 and 9780780375604 |
| Types: | Conference paper |
| DOI: | 10.1109/ISE.2002.1042936 |
| ORCIDs: | Holbøll, Joachim |
Cable insulation Charge measurement Conductivity measurement Current measurement Dielectric measurements Dielectrics and electrical insulation Polymers Pressure measurement Pulse measurements Space charge
HVDC electric power cable charge generation charge injection charge transport current density dielectric materials dynamic space charge behaviour extruded insulation field assisted electron-hole pair generation field-dependent dynamic behaviour impurity atoms leakage currents local electric field enhancement model-based framework modelling numerical analysis numerical computer model organic insulating materials polymeric DC cables polymeric dielectric polymers power cable insulation space charge space charge build-up temperature-dependent dynamic behaviour trapping
