High Frequency Attenuation in Transmission Class Solid Dielectric Cable

High frequency attenuation in shielded distribution cable is well understood; however, this cannot be said of transmission class solid dielectric cable, which has a more complicated structure, including additional semiconducting ldquobeddingrdquo layers and a moisture barrier in the form of metal tape or corrugated metallic sheath. These additional elements cause new sources of high frequency loss relative to solid dielectric distribution cable. We report measurements of high frequency loss for transmission class solid dielectric cable with a corrugated copper sheath and for cable with a metal tape moisture barrier and wire screen (concentric neutral). Analytic approximations have been developed for the various sources of high frequency loss in these cable structures, and the analytic approximations have been checked using finite element analysis. Good agreement has been achieved between the computed and measured loss.

[1]  David Pommerenke,et al.  Discrimination between internal PD and other pulses using directional coupling sensors on HV cable systems , 1999 .

[2]  Chunchuan Xu,et al.  High frequency properties of shielded power cable. 3. Loss from neutral wire-shield interaction , 2007, IEEE Electrical Insulation Magazine.

[3]  S. A. Boggs,et al.  Propagation of partial discharge pulses in shielded power cable , 1982, Conference on Electrical Insulation & Dielectric Phenomena - Annual Report 1982.

[4]  N. H. Ahmed,et al.  On-line partial discharge detection in cables , 1997, IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena.

[5]  T. Strehl,et al.  Practical experiences in on-site PD diagnosis tests of HV power cable accessories in service , 2006, Conference Record of the 2006 IEEE International Symposium on Electrical Insulation.

[6]  G. Stone,et al.  Fundamental Limitations in the Measurement of Corona and Partial Discharge , 1982, IEEE Transactions on Electrical Insulation.

[7]  N. Oussalah,et al.  Analytic Solutions for Pulse Propagation in Shielded Power Cable for Symmetric and Asymmetric PD Pulses , 2007, IEEE Transactions on Dielectrics and Electrical Insulation.

[8]  S.A. Boggs,et al.  High frequency properties of shielded power cable. Part 2: sources of error in measuring shield dielectric properties , 2006, IEEE Electrical Insulation Magazine.