TY - JOUR
T1 - Accurate computation of transient profiles along multiconductor transmission systems by means of the numerical laplace transform
AU - Nuricumbo-Guillen, Rodrigo
AU - Gomez, Pablo
AU - Espino-Cortes, Fermin P.
AU - Uribe, Felipe A.
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/10/1
Y1 - 2014/10/1
N2 - In this paper, transient internal profiles along multiconductor transmission lines are obtained from a model described in the q-s domain (spatial frequencyoral frequency). In such domain, the telegrapher equations of the line are defined in a direct algebraic form. Applying boundary conditions, these equations can be easily solved for V (q,s) and I (q,s). Then, the inverse numerical Laplace transform is applied successively (twice) to obtain v (z,t) and i (z,t), that is, the voltage and current profiles along the line. Besides, since the line's electrical parameters are defined in the frequency domain, the frequency dependence of such parameters is included in a straightforward manner. Test cases corresponding to an overhead line, a transformer winding, an underground power cable, and a transmission network are evaluated in order to demonstrate the accuracy and versatility of the proposed method. The results are compared with those obtained with Alternative Transients Program/Electromagnetic Transients Program and PSCAD/EMTDC at specific points along the transmission systems under analysis, given that the space discretization is cumbersome and prone to error accumulation in these time-domain simulation programs.
AB - In this paper, transient internal profiles along multiconductor transmission lines are obtained from a model described in the q-s domain (spatial frequencyoral frequency). In such domain, the telegrapher equations of the line are defined in a direct algebraic form. Applying boundary conditions, these equations can be easily solved for V (q,s) and I (q,s). Then, the inverse numerical Laplace transform is applied successively (twice) to obtain v (z,t) and i (z,t), that is, the voltage and current profiles along the line. Besides, since the line's electrical parameters are defined in the frequency domain, the frequency dependence of such parameters is included in a straightforward manner. Test cases corresponding to an overhead line, a transformer winding, an underground power cable, and a transmission network are evaluated in order to demonstrate the accuracy and versatility of the proposed method. The results are compared with those obtained with Alternative Transients Program/Electromagnetic Transients Program and PSCAD/EMTDC at specific points along the transmission systems under analysis, given that the space discretization is cumbersome and prone to error accumulation in these time-domain simulation programs.
KW - Numerical Laplace transform (NLT)
KW - transient internal overvoltages
KW - transmission-line modeling
UR - http://www.scopus.com/inward/record.url?scp=84907510013&partnerID=8YFLogxK
U2 - 10.1109/TPWRD.2014.2313526
DO - 10.1109/TPWRD.2014.2313526
M3 - Artículo
SN - 0885-8977
VL - 29
SP - 2385
EP - 2393
JO - IEEE Transactions on Power Delivery
JF - IEEE Transactions on Power Delivery
IS - 5
M1 - 6797979
ER -