The nonlinear dielectric response of water tree degradation in a medium voltage power cable

Medium voltage (MV) cross linked polyethylene (XLPE) insulated power cables are being used in electrical power distribution system networks throughout the world. Deterioration like voids, cracks, delimitation, protrusions and contaminants in the cable insulation may initiate water tree, electrical t...

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Bibliographic Details
Main Authors: Hussain, Noor, Nor, Nursyarizal Mohd, Abdullah, Mohd Faris, Ashraf, Khalid, Baloch, Zahoor Ahmed, Bizanjo, Sohrab Khan
Format: Conference Proceeding
Language:English
Subjects:
3rd harmonic current
Degradation
FTIR
Harmonic analysis
Mathematical models
power cable
Power cable insulation
Power cables
Power system harmonics
SEM
Trees - insulation
water tree
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Summary:Medium voltage (MV) cross linked polyethylene (XLPE) insulated power cables are being used in electrical power distribution system networks throughout the world. Deterioration like voids, cracks, delimitation, protrusions and contaminants in the cable insulation may initiate water tree, electrical tree and partial discharge. Water treeing is the main cause of insulation failure in MV power cables. The nonlinear dielectric response of water tree generates harmonics in the AC loss current. This paper presents a detailed study of the characterization of XLPE cable insulation. The morphological study of XLPE cable samples has been carried out by using the Scanning Electron Microscope (SEM) and the chemical analysis has been carried out by using Fourier Transform Infrared spectroscopy (FTIR). The MATLAB/SIMULINK program has been used to model and simulate degradation in the power cable due to water tree. This model is simulated with supply frequencies at 50 Hz, 100 Hz and 150 Hz. The 3 rd harmonic current has been recorded from the total current flowing through the cable insulation. The generated harmonics have a good relationship with degradation caused by water tree.
DOI:10.1109/SCOReD.2012.6518630