Comparison of Different Methods for Characterization of DC Conductivity of Insulating Polymers
Paper in proceeding, 2020
to estimate the field-dependent conductivity from one single measurement. Frequency domain dielectric spectroscopy (FDS) measurements allow to estimate the DC conductivity from the low frequency response. Two materials, low density polyethylene (LDPE) and cross-linked polyethylene (XLPE), were used. The SPD measurements overestimated the conductivities of both materials compared to those obtained by the charging current method for the entire studied range of temperature (30-70 ºC) and electric field (10–50 kV/mm). At the same, FDS measurements underestimated the temperature dependency of the conductivity for both LDPE and XLPE. It was noticed that the SPD technique demonstrated a very good repeatability and required significantly shorter measuring time compared to other methods.
charging current
electric conductivity
dielectric response
Frequency domain dielectric spectroscopy
polymeric insulation
surface potential
Author
Sarath Kumara
Chalmers, Electrical Engineering, Electric Power Engineering
Xiangdong Xu
Chalmers, Electrical Engineering, Electric Power Engineering
Thomas Hammarström
Chalmers, Electrical Engineering, Electric Power Engineering
Amir Masoud Pourrahimi
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Christian Müller
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Yuriy Serdyuk
Chalmers, Electrical Engineering, Electric Power Engineering
Proceedings of the 2020 IEEE 3rd International Conference on Dielectrics, ICD 2020
435-438 9342018
9781728189833 (ISBN)
Valencia, Spain,
Advanced characterization of new insulation materials for next generation of HVDC power cables
Chalmers, 2019-01-01 -- 2020-12-31.
Areas of Advance
Energy
Subject Categories
Polymer Technologies
Other Electrical Engineering, Electronic Engineering, Information Engineering
DOI
10.1109/ICD46958.2020.9342018