Full-Wave and Circuit-Based Simulations of Cable Insulation Aging/Damage Using Time-Frequency Domain Reflectometry
- Resource Type
- Conference
- Authors
- Arman, Ahmed S.; Ali, Mohammod; Glass, S. W.; Fifield, Leonard S.
- Source
- 2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Electrical Insulation and Dielectric Phenomena (CEIDP), 2021 IEEE Conference on. :531-534 Dec, 2021
- Subject
- Engineered Materials, Dielectrics and Plasmas
Power, Energy and Industry Applications
Time-frequency analysis
Continuous wavelet transforms
Reflectometry
Aging
Cable insulation
Wavelet analysis
Time-domain analysis
- Language
- ISSN
- 2576-2397
This paper presents a combined full-wave and circuit-based simulation study to investigate the important topic of cable insulation aging and physical damage. The analysis employs the time-frequency domain reflectometry (TFDR) technique that combines the advantages of both time domain reflectometry (TDR) and frequency domain reflectometry (FDR) for improved location identification and feature resolution. Coaxial cable sections with a location containing insulation aging or physical damage are simulated using Ansys High Frequency Structure Simulator (HFSS). Simulated scattering (S) parameters are then imported into the Advanced Design System (ADS) solver for time domain simulation where a Gaussian windowed chirp signal or ‘chirplet’ is launched. Finally, continuous wavelet transform (CWT) is applied in MATLAB to perform time-frequency analysis of the reflected waveforms. The results reveal that a small change in the relative permittivity of the insulation or the presence of a small point of physical damage on the insulation is reflected as a considerable change in the CWT magnitude demonstrating the efficacy of the method.