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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Accelerated frequency-dependent method of characteristics for the simulation of multiconductor transmission lines in the time domain

Full text
Author(s):
Caballero, Pablo Torrez [1] ; Kurokawa, Sergio [1] ; Kordi, Behzad [2]
Total Authors: 3
Affiliation:
[1] Sao Paulo State Univ UNESP, Ilha Solteira - Brazil
[2] Univ Manitoba, Winnipeg, MB R3T 5V6 - Canada
Total Affiliations: 2
Document type: Journal article
Source: Electric Power Systems Research; v. 168, p. 55-66, MAR 2019.
Web of Science Citations: 0
Abstract

Simulation of transients in transmission lines can be time consuming and resource demanding when performed directly in the time domain using small time steps. This paper proposes an efficient implementation of the frequency-dependent method of characteristics. The proposed implementation exploits the circuit topology of the system to reduce the number of state equations. State-space matrices are then grouped and sparsity techniques are used to solve the system of the ordinary differential equations faster. We post-process the calculated state variables to reduce the memory usage and the number of memory accesses needed in each iteration and propose a technique to correct the error due to the time discretization of the travel time along the transmission line. To decouple the multiconductor transmission line equations, the real part of the modal transformation matrix at a fix frequency is considered. Presented results demonstrate that the proposed approach is accurate for overhead transmission lines, and significantly reduces the overall computation time and memory consumption of the model. (AU)

FAPESP's process: 14/17051-0 - Inclusion of the frequency effect on the Bergeron Model: representation of the short and long transmission lines taking into account electromagnetic transients resulting from switching operations and lightning
Grantee:Pablo Torrez Caballero
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 17/08486-0 - Enhancement of the Modal Transformation routine for time-domain models using real constant transformation matrices
Grantee:Pablo Torrez Caballero
Support Opportunities: Scholarships abroad - Research Internship - Doctorate