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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.)

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

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Author(s):
Colqui, Jaimis S. L. [1] ; de Araujo, Anderson R. J. [1] ; Kurokawa, Sergio [2] ; Pissolato Filho, Jose [1]
Total Authors: 4
Affiliation:
[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
Total Affiliations: 2
Document type: Journal article
Source: ENERGIES; v. 14, n. 20 OCT 2021.
Web of Science Citations: 0
Abstract

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)

FAPESP's process: 21/06157-5 - Statistical study of overvoltages due to maneuvers in the EAT transmission lines considering the freqency dependence of the electrical parameters of the soil
Grantee:Jaimis Sajid Leon Colqui
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 19/01396-1 - Modelling conventional and tall transmission towers directly in time domain for electromagnetic transient analysis
Grantee:Anderson Ricardo Justo de Araújo
Support Opportunities: Scholarships in Brazil - Post-Doctoral