Effects of simulation models of overhead transmission line basic components on backflashover surges impinging on GIS substations

Overvoltages arising in 150 kV and 400 kV GIS substations due to backflashover of the incoming overhead transmission lines were computed with the aid of ATP-EMTP simulations, by considering the effects of several simulation models of the basic transmission line components. The protection offered against impinging surges by surge arresters operating at the substation entrance is evaluated with respect to the basic insulation level of the GIS system. The computed overvoltages vary considerably among tower grounding system models and among insulator string flashover models whereas rather insignificantly among tower simulation models. There is no systematic variation in computed overvoltages among insulator string flashover models. Single vertical lossless line models and a constant rather than a current dependent resistance are considered, in terms of simulation simplicity and safe design, as satisfactory for simulating transmission line tower and its grounding resistance, respectively, in insulation coordination studies of substations.

[1]  Akihiro Ametani,et al.  Experimental evaluation of a UHV tower model for lightning surge analysis , 1995 .

[2]  Y. Baha,et al.  Numerical electromagnetic field analysis on lightning surge response of tower with shield wire , 2000 .

[3]  Masaru Ishii,et al.  Multistory transmission tower model for lightning surge analysis , 1991 .

[4]  Takehisa Hara,et al.  Sensitivity Analysis on Grounding Models for 500kV Transmission Lines , 2001 .

[5]  C. A. Jordan,et al.  Lightning computation for transmission line with overhead ground wires , 1934 .

[6]  Mat Darveniza,et al.  Tower Surge Impedance , 1969 .

[7]  Ieee Report.  A simplified method for estimating lightning performance of transmission lines , 1985 .

[8]  William A. Chisholm,et al.  Lightning Surge Response of Ground Electrodes , 1989, IEEE Power Engineering Review.

[9]  Wasyl Janischewskyj,et al.  Estimating lightning performance of transmission line 2--Updates to analytical models , 1993 .

[10]  L. Guardado,et al.  Comparison of transmission tower models for evaluating lightning performance , 2003, 2003 IEEE Bologna Power Tech Conference Proceedings,.

[11]  F. S. Young,et al.  Estimating Lightning Performance of Transmission Lines , 1964 .

[12]  V. J. Longo,et al.  A Simplified Method for Estimating Lightning Performance of Transmission Lines , 1985, IEEE Transactions on Power Apparatus and Systems.

[13]  A. Ametani,et al.  A method of a lightning surge analysis recommended in Japan using EMTP , 2005, IEEE Transactions on Power Delivery.

[14]  C. Menemenlis,et al.  Wave Propagation on Nonuniform Lines , 1982, IEEE Transactions on Power Apparatus and Systems.

[15]  E. E. Oettle.  A new general estimation curve for predicting the impulse impedance of concentrated earth electrodes , 1988 .

[16]  H. Elahi,et al.  Modeling guidelines for fast front transients , 1996 .

[17]  Yasuhiro Matsumoto,et al.  Observation and analysis of multiphase back flashover on the Okushishiku Test Transmission Line caused by winter lightning , 1998 .

[18]  C. F. Wagner,et al.  A New Approach to the Calculation or the Lightning Perrormance or Transmission Lines III-A Simplified Method: Stroke to Tower , 1960, Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems.

[19]  H. Torres,et al.  Influence of grounding system modeling on Transient analysis of transmission lines due to direct lightning strike , 2005, 2005 IEEE Russia Power Tech.

[20]  W. Boeck.  Insulation Co-Ordination of GIS, Return of Experience, On Site Tests and Diagnostic Techniques , 1998 .

[21]  Akihiro Ametani,et al.  Frequency-dependent impedance of vertical conductors and a multiconductor tower model , 1994 .

[22]  P. Chowdhuri,et al.  Parameters of lightning strokes: a review , 2005, IEEE Transactions on Power Delivery.

[23]  A. Porrino,et al.  Performance of Large Air Gaps under Lightning Overvoltages: Experimental Study and Analysis of Accuracy of Predetermination Methods , 1989, IEEE Power Engineering Review.

[24]  T. Hara,et al.  Modelling of a transmission tower for lightning-surge analysis , 1996 .

[25]  W. Chisholm,et al.  Travel Time of Transmission Towers , 1985, IEEE Transactions on Power Apparatus and Systems.