Title :
Accurate modeling of underground cable earth impedances for electromagnetic transients
Author_Institution :
Dept. of Electr. Eng., Autonomous Univ., Leon
Abstract :
An accurate methodology for calculating transients on underground cable systems is presented in this paper. Ground impedance loops ZE (omega) of the system are calculated solving Pollaczek´s integral. Pollaczek´s solutions are extended to the Laplace complex frequency domain ZE(s) through VECTFIT. Comparisons between approximate ground models are shown through relative error criterion on transient step responses validated with a classical case reported in the literature
Keywords :
Laplace equations; electric impedance; frequency-domain analysis; integral equations; transient response; transients; underground cables; Laplace complex frequency domain; Pollaczek integral; VECTFIT; earth impedances; electromagnetic transients; error criterion; transient step responses; underground cable; Earth; Electromagnetic modeling; Frequency dependence; Frequency domain analysis; Function approximation; Impedance; Power cables; Skin effect; Transient analysis; Underground power cables; Pollaczek´s integral; transient response; underground cable earthreturn impedances; vector fitting;
Conference_Titel :
Power Engineering Society General Meeting, 2006. IEEE
Conference_Location :
Montreal, Que.
Print_ISBN :
1-4244-0493-2
DOI :
10.1109/PES.2006.1709103
