Optimization of Lumped Parameter Models to Mitigate Numerical Oscillations in the Transient Responses of Short Transmission Lines

Autor(es)

Colqui, Jaimis S. L. ^[1] ; de Araujo, Anderson R. J. ^[1] ; Kurokawa, Sergio ^[2] ; Pissolato Filho, Jose ^[1]

Afiliação do(s) autor(es)

^[1] State Univ Campinas UNICAMP, Sch Elect & Comp Engn, BR-13083872 Campinas, SP - Brazil

^[2] Sao Paulo State Univ UNESP, Dept Elect Enegineering, BR-15385000 Ilha Solteira - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ENERGIES; v. 14, n. 20 OCT 2021.
• Citações Web of Science: 0

Resumo

The Lumped Parameter Model (LPM) is a known approach to represent overhead transmission lines (TLs), especially when these elements comprehend a few tens of kilometers. LPMs employ a large number of cascaded pi-circuits to compute accurately the transient responses. These responses contain numerical spurious oscillations (NSO) characterized by erroneous peaks which distort the transient responses, mainly their peak values. Two modified LPM topologies composed of damping resistances inserted along the longitudinal or transversal branches of the cascaded pi-circuits offer significant mitigations in the NSO. In this paper, in an effort to have the maximum mitigation of the NSO and low distortion in the transient responses, two modified topologies with optimized damping resistances are proposed to represent short TLs. Results demonstrate expressive attenuation in the peaks of NSO which reflect good agreement in comparison with the responses computed by the Bergeron's line model. The mitigation of the NSO is carried out directly in the time domain and it does not require either analog or digital filters.Furthermore, no frequency-to-time transformations are necessary in this procedure. These alternative topologies can be incorporated into any electromagnetic transient program to study switching operations in power systems.</p> (AU)

• Processo FAPESP: 21/06157-5 - Estudo estatístico das sobretensões transitórias em sistemas de potência: modelagem de linhas de transmissão de EAT e sistemas de aterramento em solos com parâmetros variáveis com a frequência
• Beneficiário: Jaimis Sajid Leon Colqui
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 19/01396-1 - Representação de torres convencionais e elevadas de linhas de transmissão diretamente no domínio do tempo para análises de transitórios eletromagnéticos
• Beneficiário: Anderson Ricardo Justo de Araújo
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado