Voltage harmonic content of long artificially generated electrical arc in out-door experiment at 500 kV towers

This study involves the application of Short Time Discrete Fourier Transform in order to obtain the harmonic content of voltage between the terminals of 647 artificially generated long electrical arcs. Non-confined tests were conducted on three 500 kV towers specially built inside a laboratory facility, in order to represent as close as possible actual transmission line conditions. The 1-s duration arcs were artificially generated along the 4 m insulator string of a 500 kV tower by imposing a sustained 60 Hz current. The arc voltage harmonic content can be used to identify the moment at which the arc is stabilized in the air and only after this instant measured data can be used to derive mathematical arc model. A statistical analysis of the results, considering only the period for which the arc is stabilized, enabled the establishment of the harmonic signature of the electric arcs for a large arc current amplitude range. From the results it can be stated that an accurate arc model should properly reproduce the presented harmonic content for any arc current level.

[1]  Gilmário B Santos,et al.  Visual evaluation of the length of artificially generated electrical discharges by 3D-snakes , 2011, IEEE Transactions on Dielectrics and Electrical Insulation.

[2]  G. Ban,et al.  IMPROVED SECONDARY ARC MODELS BASED ON IDENTIFICATION OF ARC PARAMETERS FROM STAGED FAULT TEST RECORDS , 2002 .

[3]  C. M. Portela,et al.  Secondary Arc Voltage and Current Harmonic Content for Field Tests Results , 2009 .

[4]  Vladimir Terzija,et al.  A new approach to the arcing faults detection for fast autoreclosure in transmission systems , 1995 .

[5]  J. Giesbrecht,et al.  Secondary Arc Extinction and Detection Real and Simulated , 2008 .

[6]  P. Schegner,et al.  Determination of secondary arc extinction time and characterization of fault conditions of single-phase autoreclosures , 2005, 2005 International Conference on Future Power Systems.

[7]  Jong-Bae Park,et al.  A numerical algorithm for adaptive reclosing based on the calculation of the faulted phase voltage total harmonic distortion factor , 2004, IEEE Power Engineering Society General Meeting, 2004..

[8]  S.B.A. Camara,et al.  Single-phase auto-reclosure studies: secondary arc model research including a 500kV line experimental circuit , 2008, 2008 International Conference on High Voltage Engineering and Application.

[9]  C. M. Portela,et al.  Adaptative Single-Phase Autoreclosing Based on Secondary Arc Voltage Harmonic Signature , 2009 .

[10]  M. Tavares,et al.  Transmission system parameters optimization - sensitivity analysis of secondary arc current and recovery voltage , 2004, IEEE Power Engineering Society General Meeting, 2004..

[11]  K. H. Milne.  Single-Pole Reclosing Tests on Long 275-Kv Transmission Lines , 1963 .