Open Access Open Access  Restricted Access Subscription or Fee Access

Frequency Characteristics and Transient Response of Transmission Lines with Longitudinally Varying Ambient Temperature

Mohamed Mostafa Saied

Abstract


This paper addresses the steady state, the frequency characteristics and the transient response of
power lines in the presence of longitudinally varying ambient temperature. This variation will
lead to location-dependent line circuit parameters and to a changing equivalent circuit. The
derived models, which are based on the exact long line theory, can incorporate the impact of the
different patterns of the temperature distribution in terms of location and magnitude. Several
case studies of the resulting non-uniform lines are investigated. The results include the steadystate
response at any frequency, the transient voltage and current distributions and the line’s
input impedance under various loading conditions.
Keywords: Ambient temperature, distributed parameter circuits, frequency characteristics, line
modeling, non-uniform lines, power transmission lines, steady state, transients


Full Text:

PDF

References


M. M. Saied: ”Assessing the dynamic rating of overhead transmission lines”, European Transactions on Electrical Power Delivery (September 2007), 17(5):526 – 536

P.M. Callahan, Douglass:” An experimental evaluation of a thermal line uprating by conductor temperature and weather monitoring,” IEEE Trans. Power Delivery, Vol.3, No.4, pp. 1960-1967, Oct.1988.

V.Cecchi, A.Leger, K.Miu, and C.O.Nwankpa:”Incorporating Temperature Variations into Transmission-Line Models”, IEEE Trans. on Power Delivery, VOL. 26, No. 4, (Oct. 2011) pp. 2189-2195.

V. Cecchi, M. Knudson, and K. Miu: “System impacts of temperature dependent transmission line models,” IEEE Transactions on Power Delivery, vol. 28, no. 4, pp. 2300–2308, Oct 2013.

C. Braun, M. Rahman, V. Cecchi:” An Evaluation of Transmission Line Models Incorporating Longitudinal Temperature Variations” 978-1-5386-4881-0/18/$31.00 ©2018 IEEE

Wolfram Mathematica Tutorial Collection: “Advanced Numerical Differential Equation Solving” in Mathematica, Book, Wolfram Research, 2008, available at: the website: http://www.wolfram.com/learningcenter/tutorialcollection/AdvancedNumericalDifferentialEquationSolvingInMathematica

J. Grainger, W.D. Stevenson: ”Power System Analysis”, Book, McGraw-Hill, Inc., p. 753.

T. Hosono: Numerical Inversion of Laplace Transform and Some Applications in Wave Optics &Radio Science, Vol. 16 (1981), Issue 6, pp. 1015-1019

M.M.Saied, A.S.Alfuhaid: “Electromagnetic Transients in a Line-Transformer Cascade by Numerical Laplace Transform Technique”, IEEE Transactions on Power Apparatus and Systems, Vol. 104 (1985), Issue. 10, pp.2901-2909.

A. Greenwood: “Electrical Transients in Power Systems”, Book, John Wiley & Sons. Inc. 1999, Chapter 9.


Refbacks

  • There are currently no refbacks.


Copyright (c) 2020 Journal of Power Electronics & Power Systems

eISSN: 2249–863X