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

Autor(es)

Caballero, Pablo Torrez ^[1] ; Kurokawa, Sergio ^[1] ; Kordi, Behzad ^[2]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Ilha Solteira - Brazil

^[2] Univ Manitoba, Winnipeg, MB R3T 5V6 - Canada

• Tipo de documento: Artigo Científico
• Fonte: Electric Power Systems Research; v. 168, p. 55-66, MAR 2019.
• Citações Web of Science: 0

Resumo

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)

• Processo FAPESP: 14/17051-0 - Inclusão do efeito da frequência no modelo de Bergeron: representação de linhas de transmissão curtas e longas considerando transitórios eletromagnéticos resultantes de operações de manobras e de descargas atmosféricas
• Beneficiário: Pablo Torrez Caballero
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 17/08486-0 - Aprimoramento da rotina de transformação modal para modelos desenvolvidos no domínio do tempo usando matrizes de transformação reais e constantes
• Beneficiário: Pablo Torrez Caballero
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado