Comparison of Transportation Carriers in the Insulating Materials for HVDC Cable Joint

As an interface between the different insulating polymers exists in the joints of High Voltage Direct Current (HVDC) cables, the differences in the field-and-temperature dependence of the conductivities of the materials is regarded as a problem leading to interface charge accumulation and field dist...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on dielectrics and electrical insulation 2021-04, Vol.28 (2), p.555-561
Main Authors: He, Yifei, Lv, Zepeng, Wang, Xia, Wu, Yang, Su, Rui, Zhang, Chunyang, Wu, Kai
Format: Article
Language:English
Subjects:
Cables
carrier mobility
Charge injection
Charge materials
Charge transfer
Conductivity
Cross-linked polyethylene
Direct current
Electric fields
EPDM
HVDC transmission
injection
Insulation
Ionization
LDPE
Low density polyethylenes
nano-XLPE
Nanoparticles
Polyethylene
Power cable insulation
Power cables
Propylene
Space charge
Temperature
Temperature dependence
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:As an interface between the different insulating polymers exists in the joints of High Voltage Direct Current (HVDC) cables, the differences in the field-and-temperature dependence of the conductivities of the materials is regarded as a problem leading to interface charge accumulation and field distortion. In this report, using blocking materials to prevent charge injection from one or both sides of the electrodes, the contributions of charge injection and ionization in low-density polyethylene (LDPE), cross-linked polyethylene with nanoparticles (nano-XLPE) and ethylene propylene diene monomer (EPDM) are distinguished and evaluated based on the results from pulsed electro-acoustic (PEA) method. It is found that the contributions of charge injection and ionization behave differently in different materials. The mechanism behind the field-and-temperature dependences of the conductivities of the three materials is explained successfully. This study helps to clarify the charge transfer mechanism, and thus supports the quantitative calculation of the space charge and electric field distribution in cable joints.
ISSN:1070-9878
1558-4135
DOI:10.1109/TDEI.2020.009269